CN112846952A - Step-removing synchronous grinding method for inner holes with straight sections and arc sections - Google Patents
Step-removing synchronous grinding method for inner holes with straight sections and arc sections Download PDFInfo
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- CN112846952A CN112846952A CN202110099516.6A CN202110099516A CN112846952A CN 112846952 A CN112846952 A CN 112846952A CN 202110099516 A CN202110099516 A CN 202110099516A CN 112846952 A CN112846952 A CN 112846952A
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- grinding
- inner hole
- shaft
- telescopic rod
- hole
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B27/00—Other grinding machines or devices
- B24B27/0076—Other grinding machines or devices grinding machines comprising two or more grinding tools
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/22—Equipment for exact control of the position of the grinding tool or work at the start of the grinding operation
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- Mechanical Engineering (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
Abstract
The invention discloses a step-removing synchronous grinding method for an inner hole with a straight section and an arc section, and belongs to the field of machining. The grinding method comprises the following steps: s1, providing a grinder; s2, clamping the workpiece to enable the axis of the straight inner hole of the workpiece to be overlapped with the axis of the first grinding shaft; s3, starting the electric telescopic rod, and extending the electric telescopic rod to drive the driving block to move; s4, when the first and second grinding shafts reach a maximum stroke, the first and second grinding heads coincide at a first position; s5, the first processor controls the first feeding telescopic rod to retract a preset distance A, and the second processor controls the second feeding telescopic rod to extend the preset distance A; and S6, retracting the electric telescopic rod to drive the first grinding shaft and the second grinding shaft to return to the initial positions. The invention can polish the junction and remove small steps or intersection marks at the junction.
Description
Technical Field
The invention relates to the field of machining, in particular to a method for synchronously grinding steps of inner holes of straight sections and arc sections.
Background
In the field of product processing, processing inner holes of products is a common processing mode. For some precision parts, the precision size and the surface roughness of the inner hole are all required to be higher. Usually, for external dimensions, such as the outer diameter of a rod or a component, which are easy to machine, dimensional accuracy can be effectively ensured by a grinding machine. However, for the inner hole, feeding is inconvenient to control, and the machining allowance is small, so that the product is unqualified easily due to the problems of improper feeding control, residual burrs after machining and the like during finish machining. The traditional equipment such as through hole grinding machine, hole burnishing machine, the unit is with high costs, and the operating efficiency is lower. To the accurate part of minor diameter, also require higher to the precision of grinding the axle, grind the axle and diminish in the back diameter of grinding, need often change the grinding axle so that can guarantee the machining dimension, lead to batch production cost on the high side, production efficiency is lower.
As shown in fig. 1, for some pipe parts, the pipe parts have both a straight section inner hole and an arc section inner hole (such as a communicating pipe), and when the inner holes are polished, the straight section inner hole and the arc section inner hole have different extension tracks, and are usually polished separately twice, so that the processing efficiency is low; in addition, because arc hole and straight section hole separately polished during, both polished juncture can cause this juncture to appear little step and/or handing-over mark because of the difference of both sides polishing time, grinding degree etc. leads to the precision variation of whole part.
Disclosure of Invention
The invention provides a synchronous grinding method for removing steps of inner holes of both straight sections and arc sections, which can solve the problems that in the prior art, when parts which simultaneously have the inner holes of the straight sections and the inner holes of the arc sections are machined, the machining efficiency is low, and small steps and/or joint marks occur at the junctions of the inner holes of the arc sections and the inner holes of the straight sections.
A synchronous grinding method for removing steps of a straight section inner hole and an arc section inner hole is used for grinding the inner hole of a workpiece, the workpiece at least comprises a straight section inner hole and an arc section inner hole, the arc section inner hole is communicated with the straight section inner hole, and the straight section inner hole is tangent to the arc section inner hole, and the grinding method comprises the following steps:
s1, providing a grinder, the grinder comprising:
the base is provided with a guide sliding chute, and the extending track of the guide sliding chute is a standard arc section;
the driving device comprises an electric telescopic rod, a driving block, a first connecting rod, a second connecting rod and a sliding block, the driving block is fixedly connected to the output end of the electric telescopic rod, the electric telescopic rod is used for driving the driving block to move, one end of the first connecting rod is fixedly connected to the driving block, the other end of the first connecting rod is hinged to one end of the second connecting rod, the other end of the second connecting rod is hinged to the sliding block, and the sliding block is slidably arranged in the sliding groove;
one end of the first grinding shaft is fixedly arranged on the driving block, and the other end of the first grinding shaft is provided with a first grinding head for grinding a straight inner hole part of a workpiece;
one end of the second grinding shaft is fixedly connected to the sliding block, a second grinding head is arranged at the other end of the second grinding shaft, the second grinding shaft is of an arc-shaped structure, the radian of the second grinding shaft is the same as that of the guide sliding groove, and the second grinding head is used for grinding an arc-shaped inner hole part of a workpiece; when the sliding block moves, the second grinding shaft is driven to slide along the extending direction of the guide sliding chute; one end of the straight inner hole is communicated and tangent with one end of the arc-shaped inner hole;
when the electric telescopic rod acts, the first grinding shaft and the second grinding shaft are driven to act synchronously through the driving block; and the number of the first and second groups,
the stair removing device comprises a first processor, a first wireless transceiving module, a first feeding telescopic rod, a second processor, a second wireless transceiving module and a second feeding telescopic rod, wherein the first feeding telescopic rod and the first wireless transceiving module are both in signal connection with the first processor, and the second feeding telescopic rod and the second wireless transceiving module are both in signal connection with the second processor;
a first containing chamber is formed in the first grinding shaft, and a second containing chamber is formed in the second grinding shaft;
the first feeding telescopic rod is fixedly arranged in the first accommodating chamber, and the first grinding head is arranged at the output end of the first feeding telescopic rod; the second feeding telescopic rod is fixedly arranged in the second accommodating chamber, and the second grinding head is arranged at the output end of the second feeding telescopic rod;
the first and second abrading heads have at least first and second operating states:
when the first working state is achieved, the first feeding telescopic rod extends, and the first grinding head is located in the straight inner hole; the second feeding extension rod is shortened, and the second grinding head is positioned in the arc-shaped inner hole;
when the grinding head is in a second working state, the first feeding telescopic rod is shortened, the first grinding head is positioned in the straight inner hole, the second feeding telescopic rod is extended, and the second grinding head is positioned in the straight inner hole;
s2, clamping the workpiece to enable the axis of the straight inner hole of the workpiece to be coincident with the axis of the first grinding shaft, and enabling the axis of the arc-shaped inner hole and the axis of the second grinding shaft to be on the same arc;
s3, starting the electric telescopic rod, extending the electric telescopic rod to drive the driving block to move, driving the first grinding shaft to move towards the direction of the straight inner hole when the driving block moves, grinding the straight inner hole, driving the second connecting rod through the first connecting rod to drive the sliding block to slide in the guide sliding groove, and driving the second grinding shaft to move towards the arc-shaped inner hole through the sliding block to grind the arc-shaped inner hole;
s4, when the first and second grinding shafts reach a maximum stroke, the first and second grinding heads coincide at a first position; the first wireless transceiving module receives a signal and controls the first feeding telescopic rod to retract a preset distance A through the first processor; the second wireless receiving and transmitting module receives signals and controls the second feeding telescopic rod to extend for a preset distance A through the second processor; passing a second grinding head over the first position to grind the step;
s5, the first processor controls the first telescopic feeding rod to retract a preset distance a, the second processor controls the second telescopic feeding rod to extend a preset distance a, and the first and second polishing heads both return to the first position and coincide;
and S6, retracting the electric telescopic rod to drive the first grinding shaft and the second grinding shaft to return to the initial positions.
More preferably, the grinder further comprises a first and a second abdicating spring;
the first grinding shaft comprises a first rod body and a first general detection sleeve, the shape of the first general detection sleeve is matched with that of the first rod body, the second grinding shaft comprises a second rod body and a second general detection sleeve, and the shape of the second general detection sleeve is matched with that of the second rod body;
the first general detection sleeve comprises a first general detection section and a first stop section, the diameter of the rod body is smaller than that of a straight inner hole of a workpiece, the outer diameter of the first general detection section is the lower limit value of the diameter of the straight inner hole of the workpiece, the outer diameter of the first stop section is the upper limit value of the diameter of the straight inner hole of the workpiece, and the diameter of the first rod body is smaller than that of the first general detection section; the first general detection sleeve is slidably sleeved on the first rod body, one end of the first abdicating spring is fixedly connected to the first general detection sleeve, and the other end of the first abdicating spring is fixedly connected to the first grinding shaft;
the second general inspection sleeve comprises a second general inspection section and a second open-stop section, the diameter of the second rod body is smaller than the diameter of the arc-shaped inner hole of the workpiece, the outer diameter of the second general inspection section is the lower limit value of the diameter of the arc-shaped inner hole of the workpiece, the outer diameter of the second open-stop section is the upper limit value of the diameter of the arc-shaped inner hole of the workpiece, and the diameter of the second rod body is smaller than the diameter of the second general inspection section; the second general detection sleeve is slidably sleeved on the second rod body, one end of the second abdicating spring is fixedly connected to the second general detection sleeve, and the other end of the second abdicating spring is fixedly connected to the second grinding shaft;
the S3 further includes:
s31, when the first open inspection section enters the straight inner hole, the second open inspection section enters the arc inner hole, and the first open-stop section and the second open-stop section both move backwards, the step S4 is carried out;
otherwise, returning to S2, and carrying out S4 when the first through detection section enters the straight inner hole, the second through detection section enters the arc inner hole, and the first through stopping section and the second through detection section move backwards.
Preferably, the first grinding head and the second grinding head each comprise a first support block, a second support block, a connecting rod, an elastic pad and a grinding layer, and the first support block and the second support block are connected through the connecting rod; the output end of the first feeding telescopic rod is fixedly connected to a first supporting block or a second supporting block in the first grinding head, and the output end of the second feeding telescopic rod is fixedly connected to a first supporting block or a second supporting block in the second grinding head; an air inlet hole is formed in the first grinding shaft, a second air inlet hole is formed in the second grinding shaft, and the first feeding telescopic rod and the second feeding telescopic rod are fixedly arranged in the first air inlet hole and the second air inlet hole respectively; the driving block is provided with a first communicating hole which is communicated with the first air inlet; a second communication hole is formed in the sliding block and penetrates into the second air inlet hole; the first communicating hole and the second communicating hole are externally connected with an air inlet pipe;
the elastic pad is of an annular structure, two ends of the elastic pad are respectively connected to the first supporting block and the second supporting block in a sealing mode, the grinding layer is wrapped on the outer side of the elastic pad, and when the first air inlet hole and/or the second air inlet hole are/is inflated, the elastic pad drives the grinding layer to protrude outwards along the radial direction of the first grinding shaft and/or the second grinding shaft;
the S3 includes:
s31, connecting the air inlet pipe with an external air source;
s32, start external air supply and start electric telescopic handle, make electric telescopic handle drive first grinding axle with the second grinding axle removes, the cushion under the effect of atmospheric pressure to first grinding axle and/or the outside protruding deformation in week of second grinding axle drives the grinding layer is contradicted at straight hole and/or arc hole surface.
Preferably, the first supporting block and the second supporting block are both provided with a pressure relief hole, and the axis of the pressure relief hole coincides with the axis of the first grinding shaft and/or the axis of the second grinding shaft.
Preferably, the first grinding head and the second grinding head are both grinding rings, each grinding ring comprises a ring body, a support shaft and a rotating blade, an air inlet hole and a second air inlet hole are respectively formed in the first grinding shaft and the second grinding shaft, and the first feeding telescopic rod and the second feeding telescopic rod are respectively and fixedly arranged in the first air inlet hole and the second air inlet hole; the driving block is provided with a first communicating hole which is communicated with the first air inlet; a second communication hole is formed in the sliding block and penetrates into the second air inlet hole; the front ends of the first air inlet hole and the second air inlet hole are both hollow structures and are used for enabling air to flow out; the rotating blade is positioned in the first air inlet hole or the second air inlet hole, the ring body is positioned outside the first grinding shaft or the second grinding shaft, the supporting shaft is rotatably arranged at the front end of the first grinding shaft or the second grinding shaft, the rotating blade is fixedly installed at one end of the supporting shaft positioned in the first air inlet hole or the second air inlet hole, and the ring body is fixedly installed at one end of the supporting shaft positioned outside the first grinding shaft or the second grinding shaft;
the end part of the support shaft, which is positioned in the first air inlet hole or the second air inlet hole, is provided with a T-shaped sliding block; the output ends of the first feeding telescopic rod and the second feeding telescopic rod are respectively provided with a T-shaped sliding groove matched with the T-shaped sliding block, and the T-shaped sliding block of the supporting shaft in the first grinding head is rotatably arranged in the T-shaped sliding groove on the first feeding telescopic rod; the T-shaped sliding block of the supporting shaft in the second grinding head is rotatably arranged in a T-shaped sliding groove on the second feeding telescopic rod;
an inflation cavity is formed in the ring body, the cross section of the ring body is of a C-shaped structure, the ring body is provided with an opening end and a bottom wall opposite to the opening end, the opening end faces the first grinding shaft or the second grinding shaft, the bottom wall is provided with a drainage hole, and the area of the projection of the drainage hole in the axial direction of the first grinding shaft or the second grinding shaft is smaller than the area of the projection of the opening end in the axial direction of the first grinding shaft or the second grinding shaft;
the periphery of the ring body is hermetically coated with an annular elastic pad, one side of the elastic pad, which is far away from the ring body, is fixedly provided with a grinding layer, and when the air inlet is filled with air, the elastic pad drives the grinding layer to bulge outwards along the radial direction of the ring body;
when the air inlet is filled with air, the rotating blades drive the ring body to rotate under the action of airflow;
the S3 includes:
s31, connecting the air inlet pipe with an external air source;
s32, starting an external air source and starting the electric telescopic rod to enable the electric telescopic rod to drive the first grinding shaft and the second grinding shaft to move, wherein the first grinding shaft and the second grinding shaft respectively move towards a straight inner hole and an arc inner hole, and the elastic pad is bulged outwards towards the peripheral sides of the first grinding shaft and the second grinding shaft under the action of air pressure to deform so as to drive the grinding layer to abut against the surface of the inner hole;
and S33, the airflow drives the rotating blades to rotate, and the rotating blades drive the ring body to rotate through the supporting shaft.
The invention provides a synchronous step-removing grinding method with straight and arc inner holes, which drives a driving block through a single power source, the driving block synchronously drives a first grinding shaft and a second grinding shaft to move, the first grinding shaft polishes the inner hole of the straight section, the second grinding shaft polishes the inner hole of the arc section, and the synchronous polishing of the straight section and the arc section is realized; the first grinding head and the second grinding head are driven to respectively extend or shorten by utilizing the first feeding telescopic rod and the second feeding telescopic rod, after the first grinding head and the second grinding head respectively finish grinding the straight section inner hole and the arc-shaped inner hole, the first grinding head retracts, the second grinding head extends, and the second grinding head is driven to enter the straight section inner hole, so that the junction is ground, and small steps or intersection marks of the junction are removed.
Drawings
FIG. 1 is a schematic structural view of a part to be processed in the present invention;
FIG. 2 is a schematic structural diagram of a method for synchronously polishing inner holes of straight and arc sections by removing steps according to the present invention;
FIG. 3 is a front view of FIG. 2;
FIG. 4 is a schematic diagram of a first grinding spindle in one embodiment;
FIG. 5 is a schematic view of a first grinding spindle according to another embodiment;
FIG. 6 is a schematic structural view of a second grinding shaft in another embodiment;
FIG. 7 is a schematic diagram of a first polishing head in one embodiment;
FIG. 8 is an enlarged view of a portion A of FIG. 7;
FIG. 9 is a schematic diagram of a second polishing head in one embodiment;
FIG. 10 is an enlarged view of a portion of FIG. 9 at B;
FIG. 11 is a schematic view of a first polishing head according to another embodiment;
FIG. 12 is an enlarged view of a portion of FIG. 11 at C;
FIG. 13 is a first schematic diagram of a system for synchronously polishing inner holes of straight and arc sections by removing steps according to the present invention;
FIG. 14 is a second schematic diagram of a system for synchronously polishing inner holes of straight and arc sections with steps removed according to the present invention.
Description of reference numerals:
10 a first grinding shaft; 101 a first polishing head; 102 a first rod body; 103 a first pass inspection section; 104 a first stop-pass section; 105 a first abdicating spring; 106 a connecting rod; 107 a polishing layer; 108 an elastic pad; 109 a first intake hole; 110 first pressure relief vent; 11 a support block; 20, an electric telescopic rod; 21 a drive block; 211 a first via hole; 22 a first link; 23 a second link; 24 sliding blocks; 241 a second communication hole; 30 a second grinding shaft; 301 a second polishing head; 302 a second shaft body; 303 a second pass detection section; 304 a second pass-through section; 305 a second yield spring; 306 a second air intake; 40 grinding ring; 401 a ring body; 402 a drain hole; 403 inflating the chamber; 41 supporting the shaft; 42 rotating the blade; 50 a base; 51 a guide chute; 60 a first feed telescoping rod; 61 a first wireless transceiver module; 70 a second feeding telescopic rod; 71 second radio transceiver module.
Detailed Description
An embodiment of the present invention will be described in detail below with reference to the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the embodiment.
The first embodiment is as follows:
as shown in fig. 1, the workpiece at least has a straight section inner hole and an arc section inner hole, the arc section inner hole is communicated with the straight section inner hole, and the straight section inner hole is tangent to the arc section inner hole.
As shown in fig. 2 and 3, an embodiment of the present invention provides a method for synchronously grinding an inner hole of a straight section and an inner hole of an arc section, where the method includes:
s1, providing a grinder, the grinder comprising:
a base 50, on which a guide chute 51 is provided, an extending track of the guide chute 51 is a standard arc segment;
the driving device comprises an electric telescopic rod 20, a driving block 21, a first connecting rod 22, a second connecting rod 23 and a sliding block 24, wherein the driving block 21 is fixedly connected to the output end of the electric telescopic rod 20, the electric telescopic rod 20 is used for driving the driving block 21 to move, one end of the first connecting rod 22 is fixedly connected to the driving block 21, the other end of the first connecting rod 22 is hinged to one end of the second connecting rod 23, the other end of the second connecting rod 23 is hinged to the sliding block 24, and the sliding block 24 is slidably arranged in the sliding groove;
one end of the first grinding shaft 10 is fixedly arranged on the driving block 21, and the other end of the first grinding shaft 10 is provided with a first grinding head 101 for grinding a straight inner hole part of a workpiece;
one end of the second grinding shaft 30 is fixedly connected to the sliding block 24, the other end of the second grinding shaft 30 is provided with a second grinding head 301, the second grinding shaft 30 is of an arc-shaped structure, the radian of the second grinding shaft is the same as that of the guide sliding groove 51, and the second grinding head 301 is used for grinding an arc-shaped inner hole part of a workpiece; when the slide block 24 moves, the second grinding shaft 30 is driven to slide along the extending direction of the guide sliding chute 51; one end of the straight inner hole is communicated and tangent with one end of the arc-shaped inner hole;
when the electric telescopic rod 20 acts, the driving block 21 drives the first grinding shaft 10 and the second grinding shaft 30 to act synchronously; and the number of the first and second groups,
the stair removing device comprises a first processor, a first wireless transceiver module 61, a first feeding telescopic rod 60, a second processor, a second wireless transceiver module 71 and a second feeding telescopic rod 70, wherein the first feeding telescopic rod 60 and the first wireless transceiver module 61 are in signal connection with the first processor, and the second feeding telescopic rod 70 and the second wireless transceiver module 71 are in signal connection with the second processor;
a first containing chamber is formed in the first grinding shaft 10, and a second containing chamber is formed in the second grinding shaft 30;
the first feeding telescopic rod 60 is fixedly arranged in the first accommodating chamber, and the first grinding head 101 is arranged at the output end of the first feeding telescopic rod 60; the second feeding telescopic rod 70 is fixedly arranged in the second accommodating chamber, the second grinding head 301 is arranged at the output end of the second feeding telescopic rod 70, and when the second feeding telescopic rod 70 extends, the second grinding head 301 is driven to extend along the tangential direction of the second grinding shaft 30;
the first polishing head 101 and the second polishing head 301 have at least a first operating state and a second operating state:
when in the first working state, the first feeding telescopic rod 60 extends, and the first grinding head 101 is positioned in the straight inner hole; the second feeding extension rod is shortened, and the second grinding head 301 is positioned in the arc-shaped inner hole;
when in the second working state, the first telescopic feeding rod 60 is shortened, the first polishing head 101 is located in the straight inner hole, the second telescopic feeding rod 70 is extended, and the second polishing head 301 is located in the straight inner hole.
S2, clamping the workpiece to ensure that the axis of the straight inner hole of the workpiece is superposed with the axis of the first grinding shaft 10, and the axis of the arc-shaped inner hole and the axis of the second grinding shaft 30 are positioned on the same arc;
s3, starting the electric telescopic rod 20, extending the electric telescopic rod 20 to drive the driving block 21 to move, when the driving block 21 moves, driving the first grinding shaft 10 to move towards the direction of the straight inner hole to grind the straight inner hole, and simultaneously driving the second connecting rod 23 through the first connecting rod 22 to drive the sliding block 24 to slide in the guide sliding groove 51, and driving the second grinding shaft 30 to move towards the arc inner hole through the sliding block 24 to grind the arc inner hole;
s4, when the first grinding shaft 10 and the second grinding shaft 30 reach the maximum stroke, the first grinding head 101 and the second grinding head 301 are overlapped at the first position; the first wireless transceiver module 61 receives the signal, and controls the first feeding telescopic rod 60 to retract to a preset distance a through the first processor; the second wireless transceiver module 71 receives the signal, and the second processor controls the second feeding telescopic rod 70 to extend for a preset distance a; passing the second grinding head 301 over the first position, thereby grinding the step;
s5, the first processor controls the first telescopic feeding rod 60 to retract a preset distance a, the second processor controls the second telescopic feeding rod 70 to extend a preset distance a, and the first polishing head 101 and the second polishing head 301 both return to the first position and coincide;
s6, the electric telescopic rod 20 retracts to drive the first grinding shaft 10 and the second grinding shaft 30 to return to the initial position.
When the grinding device works, a workpiece is fixed, so that the axis of the inner hole of the straight section is overlapped with the axis of the first grinding shaft 10, and the axis of the inner hole of the arc-shaped section and the axis of the second grinding shaft 30 are positioned on the same arc. Starting the electric telescopic rod 20, the electric telescopic rod 20 drives the driving block 21 to move, the driving block 21 drives the first grinding shaft 10 to move, the first grinding shaft moves towards the inner hole of the straight section and grinds the inner hole of the straight section, meanwhile, the driving block 21 drives the second connecting rod 23 to move through the first connecting rod 22, the second connecting rod 23 drives the sliding block 24 to move, as the sliding block 24 can only slide in the guide sliding groove 51, the sliding block 24 can slide along the track of the guide sliding groove 51, and further drives the second grinding shaft 30 to move along the axial direction of the inner hole of the arc section and grind the inner hole, when the end parts of the first grinding head 101 and the second grinding head 301 are overlapped (at the moment, the electric telescopic rod 20 reaches the maximum stroke), a signal is sent to the first wireless transceiver module 61 and the second wireless transceiver module 71 through an external controller, the first wireless transceiver module 61 and the second wireless transceiver module 71 receive the signal and respectively send the signal to the first processor and the second processor, the first processor controls the first feeding telescopic rod 60 to retract to drive the first grinding head 101 to retract, the second processor controls the second feeding telescopic rod 70 to extend to drive the second grinding head 301 to extend into the straight inner hole, and the extending direction of the second feeding telescopic rod 70 is the same as the axial direction of the straight inner hole, so that the second grinding head 301 can grind the junction, and the junction mark of the junction is ground. This grinds machine has realized adopting single power supply through above-mentioned structure, carries out the synchronous of straight section hole and segmental arc hole simultaneously and polishes, need not complicated control system, has guaranteed synchronous precision, has carried out the processing of polishing to the handing-over trace of juncture simultaneously, avoids appearing step and handing-over trace.
Example two:
on the basis of the first embodiment, as the machining allowance is smaller during grinding, the requirement on dimensional accuracy is higher, frequent inspection is performed after grinding is needed, and the machining and inspection efficiency is reduced, as shown in fig. 5 and 6, the first milling shaft 10 further comprises a first abdicating spring 105 and a second abdicating spring 305, the first milling shaft 10 comprises a first rod body 102 and a first general inspection sleeve, the first general inspection sleeve is adapted to the shape of the first rod body 102 and is in a straight rod shape, the second milling shaft 30 comprises a second rod body 302 and a second general inspection sleeve, the second general inspection sleeve is adapted to the shape of the second rod body 302 and is in an arc structure, the radian of the second general inspection sleeve is the same as that of an inner hole of an arc section of a workpiece, and the second general inspection sleeve is positioned on the same arc curve;
the first general detection sleeve comprises a first general detection section 103 and a first through stopping section 104, the diameter of the rod body is smaller than that of a straight inner hole of a workpiece, the outer diameter of the first general detection section 103 is the lower limit value of the diameter of the straight inner hole of the workpiece, the outer diameter of the first through stopping section 104 is the upper limit value of the diameter of the straight inner hole of the workpiece, and the diameter of the first rod body 102 is smaller than that of the first general detection section 103; the first general detection sleeve is slidably sleeved on the first rod body 102, one end of a first abdicating spring 105 is fixedly connected to the first general detection sleeve, and the other end is fixedly connected to the first grinding shaft 10;
the second general detection sleeve comprises a second general detection section 303 and a second stop-go section 304, the diameter of the second rod body 302 is smaller than the diameter of the arc-shaped inner hole of the workpiece, the outer diameter of the second general detection section 303 is the lower limit value of the diameter of the arc-shaped inner hole of the workpiece, the outer diameter of the second stop-go section 304 is the upper limit value of the diameter of the arc-shaped inner hole of the workpiece, and the diameter of the second rod body 302 is smaller than the diameter of the second general detection section 303; the second general detection sleeve is slidably sleeved on the second rod body 302, one end of the second abdicating spring 305 is fixedly connected to the second general detection sleeve, and the other end is fixedly connected to the second grinding shaft 30.
The S3 further includes:
s31, when the first open inspection section 103 enters a straight inner hole, the second open inspection section 303 enters an arc inner hole, and the first open-stop section 104 and the second open-stop section 304 both move backwards, performing S4;
otherwise, returning to S2, and performing S4 when the first pass inspection section 103 enters the straight inner hole, the second pass inspection section 303 enters the arc inner hole, and the first pass stop section 104 and the second pass inspection section 303 move backward.
In operation, as the grinding is continued, when the first grinding shaft 10 and/or the second grinding shaft 30 moves beyond the inner hole of the straight section and/or the inner hole of the arc section, the first passing section 103 and the second passing section 303 can pass through and the first passing stopping section 104 and the second passing stopping section 304 cannot pass through, the machining is qualified. When the workpiece is not machined in place, only the electric telescopic rod 20 needs to be controlled to retract, and reciprocating grinding is achieved. In order to avoid the damage caused by the collision of the first through section 104, the second through section 304 and/or the first through section 103 and the second through section 303 against the orifice, in the above scheme, the first through detection sleeve and the second through detection sleeve are slidably arranged on the grinding shaft and are respectively connected to the first grinding shaft 10 and the second grinding shaft 30 through the first spring and the second spring, so that the first through detection sleeve and the second through detection sleeve can form a yielding position when touching the orifice, an operator has enough observation time, and the damage of the orifice is avoided.
Example three:
on the basis of the first or second embodiment, since the outer diameter of the polishing head becomes smaller after a polishing head with a fixed size is used for multiple times, the polished aperture becomes smaller, and a new polishing head needs to be frequently replaced, so that the processing cost is higher, in this embodiment, as shown in fig. 7 to 10, 4, the first polishing head 101 and the second polishing head 301 each include a first supporting block 11, a second supporting block 12, a connecting rod 106, an elastic pad 108 and a polishing layer 107, and the first supporting block 11 and the second supporting block 12 are connected by the connecting rod 106; the output end of the first feeding telescopic rod 60 is fixedly connected to the first supporting block 11 or the second supporting block 12 in the first grinding head 101, and the output end of the second feeding telescopic rod 70 is fixedly connected to the first supporting block 11 or the second supporting block 12 in the second grinding head 301; an air inlet hole is formed in the first grinding shaft 10, a second air inlet hole 306 is formed in the second grinding shaft 30, and the first feeding telescopic rod 60 and the second feeding telescopic rod 70 are respectively and fixedly arranged in the first air inlet hole 109 and the second air inlet hole 306; the driving block 21 is provided with a first communicating hole 211, and the first communicating hole 211 is communicated with the first air inlet 109; a second communication hole 241 is formed in the slider 24, and the second communication hole 241 penetrates into the second air inlet hole 306; the first communicating hole 211 and the second communicating hole 241 are externally connected with an air inlet pipe;
as shown in fig. 8 and 10, the elastic pad 108 is an annular structure, two ends of the elastic pad are respectively connected to the first supporting block 11 and the second supporting block 12 in a sealing manner, the outer side of the elastic pad 108 is covered with the grinding layer 107, and when the first air inlet hole 109 and/or the second air inlet hole 306 are inflated, the elastic pad 108 drives the grinding layer 107 to protrude outward along the radial direction of the first grinding shaft 10 and/or the second grinding shaft 30.
The S3 includes:
s31, connecting the air inlet pipe with an external air source;
s32, an external air source is started, the electric telescopic rod 20 drives the first grinding shaft 10 and the second grinding shaft 30 to move, and the elastic pad 108 protrudes outwards from the periphery of the first grinding shaft 10 and/or the second grinding shaft 30 under the action of air pressure to deform, so that the grinding layer 107 is driven to abut against the surfaces of the straight inner hole and/or the arc inner hole.
During grinding, air is introduced through the first air inlet holes 109 and/or the second air inlet holes 306, and the air is filled in the first air inlet holes 109 and/or the second air inlet holes 306, so that the elastic pad 108 is pressed by air pressure, and the outward protrusion is pressed against the surface of the inner hole, and grinding is realized. Because the elasticity surplus of elastic pad 108 is great, can form through atmospheric pressure and warp to effective compensation grinding layer 107 that thins gradually, thereby can effectively reduce the change frequency of grinding head, although the deflection of elastic pad 108 is uncontrollable, combine to lead to examining cover work, can realize not shutting down the detection, consequently can improve machining efficiency under the circumstances that has great compensation surplus.
Since the chips formed during grinding remain in the hole and the chips scratch the surface of the inner hole during grinding, and the smoothness is reduced, in this embodiment, as shown in fig. 8 and 10, a pressure relief hole 110 is formed in the support block, and the axis of the pressure relief hole 110 coincides with the axis of the grinding shaft. The diameter of the pressure relief hole 110 is smaller than the diameters of the first intake hole 109 and the second intake hole 306. Therefore, although the pressure relief hole 110 will cause the air flow to flow out, the aperture of the pressure relief hole 110 is smaller, so that a higher air pressure can still be maintained in the air inlet, and the elastic cushion 108 can effectively compensate.
Example four:
in another embodiment, as shown in fig. 11 and 12, each of the first polishing head 101 and the second polishing head 301 is a polishing ring 40, the polishing ring 40 includes a ring body 401, a supporting shaft 41 and a rotating blade 42, and an air inlet hole and a second air inlet hole 306 are respectively opened in the first polishing shaft 10 and the second polishing shaft 30; the driving block 21 is provided with a first communicating hole 211, and the first communicating hole 211 is communicated with the first air inlet 109; a second communication hole 241 is formed in the slider 24, and the second communication hole 241 penetrates into the second air inlet hole 306; the front ends of the first air inlet hole 109 and the second air inlet hole 306 are hollow structures, so that air can flow out; the rotating blade 42 is located in the first air inlet hole 109 or the second air inlet hole 306, the ring body 401 is located outside the first grinding shaft 10 or the second grinding shaft 30, the support shaft 41 is rotatably disposed at the front end of the first grinding shaft 10 or the second grinding shaft 30, the rotating blade 42 is fixedly mounted at one end of the support shaft 41 located in the first air inlet hole 109 or the second air inlet hole 306, and the ring body 401 is fixedly mounted at one end (end far from the driving block 21) of the support shaft 41 located outside the first grinding shaft 10 or the second grinding shaft 30;
an inflation cavity 403 is formed in the ring body 401, the cross section of the ring body 401 is of a C-shaped structure, the ring body 401 is provided with an open end and a bottom wall opposite to the open end, the open end faces the grinding shaft, the bottom wall is provided with a drainage hole 402, and the area of the projection of the drainage hole 402 in the axial direction of the grinding shaft is smaller than the area of the projection of the open end in the axial direction of the first grinding shaft 10 or the second grinding shaft 30, so that high pressure can be effectively formed in the inflation cavity 403;
the circumferential side of the ring body 401 is hermetically wrapped with an annular elastic pad 108, one side of the elastic pad 108, which is far away from the ring body 401, is fixedly provided with a grinding layer 107, and when the air is filled in the air inlet, the elastic pad 108 drives the grinding layer 107 to protrude outwards along the radial direction of the ring body 401;
when the air inlet is filled with air, the rotating blades 42 drive the ring body 401 to rotate under the action of the air flow.
The S3 includes:
s31, connecting the air inlet pipe with an external air source;
s32, starting an external air source and starting the electric telescopic rod 20, so that the electric telescopic rod 20 drives the first grinding shaft 10 and the second grinding shaft 30 to move, the first grinding shaft 10 and the second grinding shaft 30 respectively move towards a straight inner hole and an arc inner hole, the elastic pad 108 protrudes and deforms outwards towards the peripheral sides of the first grinding shaft 10 and the second grinding shaft 30 under the action of air pressure, and drives the grinding layer 107 to abut against the surface of the inner hole;
s33, the airflow drives the rotating blade 42 to rotate, and the rotating blade 42 drives the ring body 401 to rotate through the supporting shaft 41.
The during operation, aerify through the intake pipe, the air current passes through the inlet port, the fretwork position that sees through the inlet port front end gets into aerifys chamber 403, because the projected area of discharge orifice 402 is less than the area of ring body 401 open end, consequently, the air input of air current is greater than the air output, thereby make and form atmospheric pressure in aerifing chamber 403, force cushion 108 to warp, it contradicts on the lateral wall of hole to drive wearing layer 107, and the air current flow in-process, can drive the blade and rotate, blade rotation drives ring body 401 and rotates and then drive wearing layer 107, because the grinding axle itself has a rotation rate, the rotation rate of grinding layer 107 adds ring body 401's rotation rate for the rotation rate of grinding axle, thereby realize high-speed grinding, improve grinding efficiency and effect.
The above disclosure is only for a few specific embodiments of the present invention, however, the present invention is not limited to the above embodiments, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.
Claims (5)
1. A synchronous grinding method for removing steps of a straight section inner hole and an arc section inner hole is used for grinding the inner hole of a workpiece, the workpiece at least comprises a straight section inner hole and an arc section inner hole, the arc section inner hole is communicated with the straight section inner hole, and the straight section inner hole is tangent to the arc section inner hole, and the grinding method is characterized by comprising the following steps of:
s1, providing a grinder, the grinder comprising:
the base is provided with a guide sliding chute, and the extending track of the guide sliding chute is a standard arc section;
the driving device comprises an electric telescopic rod, a driving block, a first connecting rod, a second connecting rod and a sliding block, the driving block is fixedly connected to the output end of the electric telescopic rod, the electric telescopic rod is used for driving the driving block to move, one end of the first connecting rod is fixedly connected to the driving block, the other end of the first connecting rod is hinged to one end of the second connecting rod, the other end of the second connecting rod is hinged to the sliding block, and the sliding block is slidably arranged in the sliding groove;
one end of the first grinding shaft is fixedly arranged on the driving block, and the other end of the first grinding shaft is provided with a first grinding head for grinding a straight inner hole part of a workpiece;
one end of the second grinding shaft is fixedly connected to the sliding block, a second grinding head is arranged at the other end of the second grinding shaft, the second grinding shaft is of an arc-shaped structure, the radian of the second grinding shaft is the same as that of the guide sliding groove, and the second grinding head is used for grinding an arc-shaped inner hole part of a workpiece; when the sliding block moves, the second grinding shaft is driven to slide along the extending direction of the guide sliding chute; one end of the straight inner hole is communicated and tangent with one end of the arc-shaped inner hole;
when the electric telescopic rod acts, the first grinding shaft and the second grinding shaft are driven to act synchronously through the driving block; and the number of the first and second groups,
the stair removing device comprises a first processor, a first wireless transceiving module, a first feeding telescopic rod, a second processor, a second wireless transceiving module and a second feeding telescopic rod, wherein the first feeding telescopic rod and the first wireless transceiving module are both in signal connection with the first processor, and the second feeding telescopic rod and the second wireless transceiving module are both in signal connection with the second processor;
a first containing chamber is formed in the first grinding shaft, and a second containing chamber is formed in the second grinding shaft;
the first feeding telescopic rod is fixedly arranged in the first accommodating chamber, and the first grinding head is arranged at the output end of the first feeding telescopic rod; the second feeding telescopic rod is fixedly arranged in the second accommodating chamber, and the second grinding head is arranged at the output end of the second feeding telescopic rod;
the first and second abrading heads have at least first and second operating states:
when the first working state is achieved, the first feeding telescopic rod extends, and the first grinding head is located in the straight inner hole; the second feeding extension rod is shortened, and the second grinding head is positioned in the arc-shaped inner hole;
when the grinding head is in a second working state, the first feeding telescopic rod is shortened, the first grinding head is positioned in the straight inner hole, the second feeding telescopic rod is extended, and the second grinding head is positioned in the straight inner hole;
s2, clamping the workpiece to enable the axis of the straight inner hole of the workpiece to be coincident with the axis of the first grinding shaft, and enabling the axis of the arc-shaped inner hole and the axis of the second grinding shaft to be on the same arc;
s3, starting the electric telescopic rod, extending the electric telescopic rod to drive the driving block to move, driving the first grinding shaft to move towards the direction of the straight inner hole when the driving block moves, grinding the straight inner hole, driving the second connecting rod through the first connecting rod to drive the sliding block to slide in the guide sliding groove, and driving the second grinding shaft to move towards the arc-shaped inner hole through the sliding block to grind the arc-shaped inner hole;
s4, when the first and second grinding shafts reach a maximum stroke, the first and second grinding heads coincide at a first position; the first wireless transceiving module receives a signal and controls the first feeding telescopic rod to retract a preset distance A through the first processor; the second wireless receiving and transmitting module receives signals and controls the second feeding telescopic rod to extend for a preset distance A through the second processor; passing a second grinding head over the first position to grind the step;
s5, the first processor controls the first telescopic feeding rod to retract a preset distance a, the second processor controls the second telescopic feeding rod to extend a preset distance a, and the first and second polishing heads both return to the first position and coincide;
and S6, retracting the electric telescopic rod to drive the first grinding shaft and the second grinding shaft to return to the initial positions.
2. The synchronous de-stepping grinding method for the inner holes of the straight sections and the arc sections simultaneously as claimed in claim 1, wherein the grinding machine further comprises a first abdicating spring and a second abdicating spring;
the first grinding shaft comprises a first rod body and a first general detection sleeve, the shape of the first general detection sleeve is matched with that of the first rod body, the second grinding shaft comprises a second rod body and a second general detection sleeve, and the shape of the second general detection sleeve is matched with that of the second rod body;
the first general detection sleeve comprises a first general detection section and a first stop section, the diameter of the rod body is smaller than that of a straight inner hole of a workpiece, the outer diameter of the first general detection section is the lower limit value of the diameter of the straight inner hole of the workpiece, the outer diameter of the first stop section is the upper limit value of the diameter of the straight inner hole of the workpiece, and the diameter of the first rod body is smaller than that of the first general detection section; the first general detection sleeve is slidably sleeved on the first rod body, one end of the first abdicating spring is fixedly connected to the first general detection sleeve, and the other end of the first abdicating spring is fixedly connected to the first grinding shaft;
the second general inspection sleeve comprises a second general inspection section and a second open-stop section, the diameter of the second rod body is smaller than the diameter of the arc-shaped inner hole of the workpiece, the outer diameter of the second general inspection section is the lower limit value of the diameter of the arc-shaped inner hole of the workpiece, the outer diameter of the second open-stop section is the upper limit value of the diameter of the arc-shaped inner hole of the workpiece, and the diameter of the second rod body is smaller than the diameter of the second general inspection section; the second general detection sleeve is slidably sleeved on the second rod body, one end of the second abdicating spring is fixedly connected to the second general detection sleeve, and the other end of the second abdicating spring is fixedly connected to the second grinding shaft;
the S3 further includes:
s31, when the first open inspection section enters the straight inner hole, the second open inspection section enters the arc inner hole, and the first open-stop section and the second open-stop section both move backwards, the step S4 is carried out;
otherwise, returning to S2, and carrying out S4 when the first through detection section enters the straight inner hole, the second through detection section enters the arc inner hole, and the first through stopping section and the second through detection section move backwards.
3. The synchronous stepped-down grinding method for internal bores with straight sections and arc sections as claimed in claim 1, wherein said first grinding head and said second grinding head each comprise a first supporting block, a second supporting block, a connecting rod, an elastic pad and a grinding layer, said first supporting block and said second supporting block being connected by said connecting rod; the output end of the first feeding telescopic rod is fixedly connected to a first supporting block or a second supporting block in the first grinding head, and the output end of the second feeding telescopic rod is fixedly connected to a first supporting block or a second supporting block in the second grinding head; an air inlet hole is formed in the first grinding shaft, a second air inlet hole is formed in the second grinding shaft, and the first feeding telescopic rod and the second feeding telescopic rod are fixedly arranged in the first air inlet hole and the second air inlet hole respectively; the driving block is provided with a first communicating hole which is communicated with the first air inlet; a second communication hole is formed in the sliding block and penetrates into the second air inlet hole; the first communicating hole and the second communicating hole are externally connected with an air inlet pipe;
the elastic pad is of an annular structure, two ends of the elastic pad are respectively connected to the first supporting block and the second supporting block in a sealing mode, the grinding layer is wrapped on the outer side of the elastic pad, and when the first air inlet hole and/or the second air inlet hole are/is inflated, the elastic pad drives the grinding layer to protrude outwards along the radial direction of the first grinding shaft and/or the second grinding shaft;
the S3 includes:
s31, connecting the air inlet pipe with an external air source;
s32, start external air supply and start electric telescopic handle, make electric telescopic handle drive first grinding axle with the second grinding axle removes, the cushion under the effect of atmospheric pressure to first grinding axle and/or the outside protruding deformation in week of second grinding axle drives the grinding layer is contradicted at straight hole and/or arc hole surface.
4. The method for synchronously grinding the inner hole of the straight section and the inner hole of the arc section simultaneously by removing the step of claim 1, wherein the first supporting block and the second supporting block are both provided with a pressure relief hole, and the axis of the pressure relief hole is coincided with the axis of the first grinding shaft and/or the second grinding shaft.
5. The method for synchronously grinding steps of an inner hole with straight sections and arc sections as claimed in claim 1, wherein the first grinding head and the second grinding head are both grinding rings, each grinding ring comprises a ring body, a supporting shaft and a rotating blade, an air inlet hole and a second air inlet hole are respectively formed in the first grinding shaft and the second grinding shaft, and the first feeding telescopic rod and the second feeding telescopic rod are respectively and fixedly arranged in the first air inlet hole and the second air inlet hole; the driving block is provided with a first communicating hole which is communicated with the first air inlet; a second communication hole is formed in the sliding block and penetrates into the second air inlet hole; the front ends of the first air inlet hole and the second air inlet hole are both hollow structures and are used for enabling air to flow out; the rotating blade is positioned in the first air inlet hole or the second air inlet hole, the ring body is positioned outside the first grinding shaft or the second grinding shaft, the supporting shaft is rotatably arranged at the front end of the first grinding shaft or the second grinding shaft, the rotating blade is fixedly installed at one end of the supporting shaft positioned in the first air inlet hole or the second air inlet hole, and the ring body is fixedly installed at one end of the supporting shaft positioned outside the first grinding shaft or the second grinding shaft;
the end part of the support shaft, which is positioned in the first air inlet hole or the second air inlet hole, is provided with a T-shaped sliding block; the output ends of the first feeding telescopic rod and the second feeding telescopic rod are respectively provided with a T-shaped sliding groove matched with the T-shaped sliding block, and the T-shaped sliding block of the supporting shaft in the first grinding head is rotatably arranged in the T-shaped sliding groove on the first feeding telescopic rod; the T-shaped sliding block of the supporting shaft in the second grinding head is rotatably arranged in a T-shaped sliding groove on the second feeding telescopic rod;
an inflation cavity is formed in the ring body, the cross section of the ring body is of a C-shaped structure, the ring body is provided with an opening end and a bottom wall opposite to the opening end, the opening end faces the first grinding shaft or the second grinding shaft, the bottom wall is provided with a drainage hole, and the area of the projection of the drainage hole in the axial direction of the first grinding shaft or the second grinding shaft is smaller than the area of the projection of the opening end in the axial direction of the first grinding shaft or the second grinding shaft;
the periphery of the ring body is hermetically coated with an annular elastic pad, one side of the elastic pad, which is far away from the ring body, is fixedly provided with a grinding layer, and when the air inlet is filled with air, the elastic pad drives the grinding layer to bulge outwards along the radial direction of the ring body;
when the air inlet is filled with air, the rotating blades drive the ring body to rotate under the action of airflow;
the S3 includes:
s31, connecting the air inlet pipe with an external air source;
s32, starting an external air source and starting the electric telescopic rod to enable the electric telescopic rod to drive the first grinding shaft and the second grinding shaft to move, wherein the first grinding shaft and the second grinding shaft respectively move towards a straight inner hole and an arc inner hole, and the elastic pad is bulged outwards towards the peripheral sides of the first grinding shaft and the second grinding shaft under the action of air pressure to deform so as to drive the grinding layer to abut against the surface of the inner hole;
and S33, the airflow drives the rotating blades to rotate, and the rotating blades drive the ring body to rotate through the supporting shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110099516.6A CN112846952A (en) | 2021-01-25 | 2021-01-25 | Step-removing synchronous grinding method for inner holes with straight sections and arc sections |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110099516.6A CN112846952A (en) | 2021-01-25 | 2021-01-25 | Step-removing synchronous grinding method for inner holes with straight sections and arc sections |
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| CN112846952A true CN112846952A (en) | 2021-05-28 |
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| RU2182531C2 (en) * | 2000-01-19 | 2002-05-20 | Блурцян Давид Рафикович | Internal grinding method |
| US20050107001A1 (en) * | 2003-11-18 | 2005-05-19 | Dieter Moeller | Grinding apparatus for blending defects on turbine blades and associated method of use |
| CN101850431A (en) * | 2010-04-09 | 2010-10-06 | 四川三洲川化机核能设备制造有限公司 | Method and device for machining inner bending holes of main nuclear power pipeline bend on horizontal boring machine |
| CN103042460A (en) * | 2011-11-04 | 2013-04-17 | 浙江天兴管业有限公司 | Outside polishing device for bended pipe fittings |
| CN103862225A (en) * | 2012-12-14 | 2014-06-18 | 上海重型机器厂有限公司 | Processing method for inner hole of elbow of nuclear power main pipeline |
| CN207508469U (en) * | 2018-02-08 | 2018-06-19 | 一诺精工（威海）有限公司 | A kind of arcuate socket electric discharge device |
| CN209978787U (en) * | 2019-08-09 | 2020-01-21 | 宜春先锋军工机械有限公司 | Inner diameter detection measuring tool for annular part |
| CN111975489A (en) * | 2020-08-26 | 2020-11-24 | 上海远葆工业设计有限公司 | Metal grinding device |
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2021
- 2021-01-25 CN CN202110099516.6A patent/CN112846952A/en not_active Withdrawn
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2182531C2 (en) * | 2000-01-19 | 2002-05-20 | Блурцян Давид Рафикович | Internal grinding method |
| US20050107001A1 (en) * | 2003-11-18 | 2005-05-19 | Dieter Moeller | Grinding apparatus for blending defects on turbine blades and associated method of use |
| CN101850431A (en) * | 2010-04-09 | 2010-10-06 | 四川三洲川化机核能设备制造有限公司 | Method and device for machining inner bending holes of main nuclear power pipeline bend on horizontal boring machine |
| CN103042460A (en) * | 2011-11-04 | 2013-04-17 | 浙江天兴管业有限公司 | Outside polishing device for bended pipe fittings |
| CN103862225A (en) * | 2012-12-14 | 2014-06-18 | 上海重型机器厂有限公司 | Processing method for inner hole of elbow of nuclear power main pipeline |
| CN207508469U (en) * | 2018-02-08 | 2018-06-19 | 一诺精工（威海）有限公司 | A kind of arcuate socket electric discharge device |
| CN209978787U (en) * | 2019-08-09 | 2020-01-21 | 宜春先锋军工机械有限公司 | Inner diameter detection measuring tool for annular part |
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Application publication date: 20210528 |