CN111843072B - Crossover hole electrolysis radius anchor clamps - Google Patents
Crossover hole electrolysis radius anchor clamps Download PDFInfo
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- CN111843072B CN111843072B CN202010780332.1A CN202010780332A CN111843072B CN 111843072 B CN111843072 B CN 111843072B CN 202010780332 A CN202010780332 A CN 202010780332A CN 111843072 B CN111843072 B CN 111843072B
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- hole
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H3/00—Electrochemical machining, i.e. removing metal by passing current between an electrode and a workpiece in the presence of an electrolyte
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H11/00—Auxiliary apparatus or details, not otherwise provided for
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
The invention relates to a crossed hole electrolytic rounding fixture which comprises a base, an insulating sleeve, a water inlet pipe, a cathode rod and a cathode head, wherein the base is used for being connected with a workpiece to be machined, and an inlet and an outlet are formed in the base; the insulating sleeve comprises an upper sleeve body and a lower sleeve body, and the upper sleeve body is used for being connected with the base; the water inlet pipe is connected to the insulating sleeve, the water inlet pipe is communicated with a central hole of the insulating sleeve, the central hole is used for conveying electrolyte input through the water inlet pipe to a cross hole of a cross hole on a workpiece to be machined, an opening communicated with the central hole is formed in the side wall of the lower end part of the lower sleeve body, the upper end of the cathode rod extends into the central hole, the upper end of the cathode rod is connected with the water inlet pipe, the cathode head is connected to the lower end of the cathode rod, and the end part of the cathode head extends out of the lower sleeve body through the opening; the end of the cathode tab can extend into the second aperture. The invention has stronger electric field during processing, and can improve the flow rate of the electrolyte at the cross orifice, so that the electrolysis speed is higher, and the invention is more favorable for forming larger electrolysis rounding.
Description
Technical Field
The invention relates to the field of electrolytic machining, in particular to a crossed hole electrolytic rounding clamp.
Background
A large amount of burr flash often remains in the orifice at the intersection of the cross holes after machining, and on the other hand, the pressure in the high-pressure oil passage of many parts is large, and stress concentration is particularly caused at the orifice at the intersection of the cross holes. Therefore, deburring or rounding of the orifice at the intersection of the intersecting holes is always a difficult point for machining, especially for the intersecting holes of the high-pressure oil ducts, the rounding of the orifice will influence the stress of the part in the working state of the high-pressure oil, and if the rounding is small, irregular or poor in roughness, the stress will be too large, which is also one of the main reasons for the cracking of the part.
Disclosure of Invention
The invention aims to provide a cross hole electrolytic rounding clamp so as to effectively perform electrolytic rounding on an orifice at the joint of cross holes.
The invention relates to a crossed hole electrolytic rounding clamp, which is used for rounding a crossed hole opening of a crossed hole of a workpiece to be machined, wherein the crossed hole of the workpiece to be machined is provided with a first hole and a second hole which are crossed with each other; the insulating sleeve comprises an upper sleeve body and a lower sleeve body, the upper sleeve body is used for being connected with the base, and the lower sleeve body can extend into the first hole through the inlet; the water inlet pipe is connected to the insulating sleeve, the water inlet pipe is communicated with a central hole of the insulating sleeve, the central hole is used for conveying electrolyte input through the water inlet pipe to a cross hole of a cross hole on the workpiece to be machined, an opening communicated with the central hole is formed in the side wall of the lower end part of the lower sleeve body, the upper end of the cathode rod extends into the central hole, the upper end of the cathode rod is connected with the water inlet pipe, the cathode head is connected to the lower end of the cathode rod, and the end part of the cathode head extends out of the lower sleeve body through the opening; in use, the end of the cathode head is able to extend into the second hole through the cross bore of the cross hole in the workpiece to be machined.
Further, the cathode tabs are inclined upward from the root to the end.
The positioning device further comprises a positioning pin, an upper positioning hole in interference fit with the positioning pin is formed in the upper sleeve body, and a lower positioning hole in clearance fit with the positioning pin is formed in the base.
Furthermore, the upper end of centre bore is equipped with the internal thread, be equipped with on the inlet tube with internal thread complex external screw thread.
Further, the water inlet pipe, the cathode rod and the cathode head are all made of conducting materials.
Further, the base and the insulating sleeve are both made of insulating materials.
Further, the lower extreme of inlet tube is equipped with connecting portion, be equipped with the connecting hole that the opening is down on the connecting portion, the upper end of negative pole with connecting hole interference fit.
Further, the opening extends upwards from the lower end surface of the lower sleeve body.
Further, the diameter of the cathode head is larger than that of the cathode rod.
Furthermore, the outer surface of the end part of the cathode head is a convex curved surface.
According to the invention, the cathode head is arranged, so that the electric field is stronger during processing, and the flow velocity of the electrolyte at the cross orifice can be increased, so that the electrolysis speed is higher, and the formation of larger electrolysis radius is facilitated; the cathode head is arranged to be in a hook-shaped structure, so that the cathode head is particularly suitable for electrolytic rounding of the crossed orifice, and particularly suitable for electrolytic rounding of the crossed orifice when the crossed angle of the crossed hole is an acute angle.
Drawings
FIG. 1 is a schematic structural view of a cross-hole electrolytic rounding fixture according to the present invention;
FIG. 2 is a schematic view of the structure of the insulating sheath;
FIG. 3 is a schematic view of the cathode rod and the cathode head;
fig. 4 is an assembly view of the cathode rod and the cathode head.
In the figure: 1-a base; 2, insulating sleeve; 3, water inlet pipe; 4-cathode bar; 5-cathode head; 6, positioning pins; 7, an upper sleeve body; 8, a lower sleeve body; 9-a central hole; 10-internal thread; 11-upper positioning holes; 12-an opening; 13-water inlet channel; 14-an outlet; 15-curved surface; 16-connecting hole; 17-a workpiece to be processed.
Detailed Description
The invention will be further explained with reference to the drawings.
A cross-hole electrolytic rounding jig as shown in fig. 1 to 3 for rounding cross-hole openings of cross-holes of a work piece 17, the cross-holes of the work piece 17 having a first hole and a second hole which cross each other, the cross-hole electrolytic rounding jig comprising a base 1, an insulating sleeve 2, a water inlet pipe 3, a cathode rod 4 and a cathode head 5, the base 1 being for connection with the work piece 17, the base 1 being provided with an inlet for corresponding to the first hole and an outlet 14 for corresponding to the second hole; the insulating sleeve 2 comprises an upper sleeve body 7 and a lower sleeve body 8, the upper sleeve body 7 is used for being connected with the base 1, and the lower sleeve body 8 can extend into the first hole through the inlet; the water inlet pipe 3 is connected to the insulating sleeve 2, the water inlet pipe 3 is communicated with a central hole 9 of the insulating sleeve 2, the central hole 9 is used for conveying electrolyte input through the water inlet pipe 3 to an intersection hole of an intersection hole on a workpiece 17 to be processed, an opening 12 communicated with the central hole 9 is arranged on the side wall of the lower end part of the lower sleeve body 8, the upper end of the cathode rod 4 extends into the central hole 9, the upper end of the cathode rod 4 is connected with the water inlet pipe 3, the cathode head 5 is connected to the lower end of the cathode rod 4, and the end part of the cathode head 5 extends out of the lower sleeve body 8 through the opening 12; in use, the end of the cathode head 5 can extend into the second hole through the cross bore of the cross hole in the member 17 to be machined. The eccentricity of the end of the cathode tab 5 with respect to the central axis of the cathode rod 4 is based on the fact that the end of the cathode tab 5 can protrude into the second hole without interference, that is, when the cathode rod 4 and the lower sleeve 8 are coaxially disposed, the eccentricity of the end of the cathode tab 5 with respect to the central axis of the cathode rod 4 is greater than the radius of the first hole.
In this embodiment, the cathode tabs 5 are inclined upward from the root to the end, and the cathode tabs 5 form a barb structure at the lower end of the cathode rod 4. The barb structure is more favorable to increasing the resistance, more is favorable to promoting the velocity of flow of electrolyte.
In this embodiment, the positioning device further includes a positioning pin 6, an upper positioning hole 11 that is in interference fit with the positioning pin 6 is disposed on the upper sleeve body 7, and a lower positioning hole that is in clearance fit with the positioning pin 6 is disposed on the base 1. The outer diameter of the upper sleeve body 7 is larger than that of the lower sleeve body 8, and the upper positioning hole 11 is formed in the position, protruding out of the lower sleeve body 8, of the upper sleeve body 7.
In this embodiment, the upper end of the central hole 9 is provided with an internal thread 10, and the water inlet pipe 3 is provided with an external thread matching with the internal thread 10. The connection between the insulating sleeve 2 and the water inlet pipe 3 is realized through the matching of the internal thread 10 and the external thread.
In the present embodiment, the water inlet pipe 3, the cathode rod 4 and the cathode head 5 are all made of metal materials with good conductivity and corrosion resistance, such as: bronze alloys.
In the present embodiment, the base 1 and the insulating sheath 2 are made of materials having good insulating and corrosion-resistant properties, such as: polytetrafluoroethylene.
In this embodiment, the lower end of the water inlet pipe 3 is provided with a connecting portion, the connecting portion is provided with a connecting hole with a downward opening 12, and the upper end of the cathode rod 4 is in interference fit with the connecting hole. A water inlet channel 13 communicated with the central hole 9 is arranged in the water inlet pipe 3.
In this embodiment, the opening 12 extends upward from the lower end of the lower housing 8 for ease of assembly.
In this embodiment, the diameter of the cathode head 5 is larger than that of the cathode rod 4, which is more beneficial to increase the resistance and increase the flow rate of the electrolyte.
In this embodiment, the outer surface of the end of the cathode head 5 is a convex curved surface 15, which can reduce the damage to the wall of the first hole and reduce the assembly difficulty.
As shown in fig. 4, in specific implementation, a connection hole 16 may be disposed on the cathode head 5 to be engaged with the lower end of the cathode rod 4, the lower end of the cathode rod 4 is engaged with the connection hole 16, the cathode rod 4 and the cathode head 5 are fixedly connected together by welding, and then the root of the cathode head 5 is polished flat, and the end of the cathode head 5 is polished to be a curved surface 15.
In the embodiment, the base 1 is provided with a cavity matched with the workpiece 17 to be processed, and the workpiece 17 to be processed is loaded into the cavity to realize the connection between the base 1 and the workpiece 17 to be processed.
Before the electrolytic chamfering fixture for the cross hole is used, the fixture components except the base 1 are assembled, the positioning pin 6 is arranged in the upper positioning hole 11, and the lower part of the positioning pin 6 needs to be exposed out of one section of the upper sleeve body 7 for positioning. Then the water inlet pipe 3 is screwed into the insulating sleeve 2. The welded assembly of cathode rod 4 and cathode tab 5 is then attached to the inlet tube 3 in an orientation that is aligned prior to assembly to ensure that the center axis of the cathode tab 5 is substantially in the same plane as the center axis of the locator pin 6. Since the cathode rod 4 is interference fit with the water inlet tube 3, the welded assembly of the cathode rod 4 and the cathode head 5 needs to be knocked with a small force during installation to prevent the cathode rod 4 from bending.
When the electrolytic chamfering fixture for the cross hole is used, the workpiece to be machined 17 is firstly loaded into the cavity of the base 1, and the workpiece to be machined 17 is rotated to enable the first hole and the second hole of the workpiece to be machined 17 to be basically aligned with the inlet and the outlet 14 on the base 1 respectively. The jig assemblies other than the base 1 are then inserted together into the first hole. Because the eccentricity of the cathode head 5 is larger than the radius of the first hole, when the cathode rod 4 and the cathode head 5 assembly are arranged in the first hole, the cathode head 5 is subjected to the resistance of the hole wall of the first hole to drive the cathode rod 4 to bend, when waiting that negative pole head 5 adorns cross drill way position, negative pole 4 is the original state of rebounding again for the tip of negative pole head 5 stretches into the second hole, consequently packs into and need slowly pack into, avoids packing into and causes negative pole head 5 and negative pole 4 to damage too soon. Finally, a power supply anode is connected to the workpiece 17 to be processed, a power supply cathode is connected to the water inlet pipe 3, and an electrolyte water pipe is connected to the water inlet pipe 3.
During electrolytic machining, the direct-current power supply is started, and electrolyte flows into the central hole 9 of the insulating sleeve 2 through the water inlet pipe 3, passes through the opening 12, passes through the cross hole of the workpiece 17 to be machined, and then flows out of the second hole and the outlet 14. At this time, the workpiece 17 to be machined is an anode, the cathode head 5 and the cathode rod 4 are cathodes, which form an electrolytic field by the electrolyte, and the anode is electrolyzed to gradually form a round by the washing of the electrolyte.
This intersection hole electrolysis radius anchor clamps are superior to other electrolysis anchor clamps because, increased the design of negative pole head 5 on the negative pole 4, resistance grow when electrolyte flows through negative pole head 5 department, and the electrolyte velocity of flow is faster, and electrolysis speed is higher, is favorable to forming great electrolysis radius, is favorable to guaranteeing electrolysis roughness. The cathode rod 4 and the cathode head 5 are hook-shaped structures, so that the resistance is improved, and the flow speed of the electrolyte is improved. Meanwhile, the cathode head 5 can extend into the second hole, so that the electric field is stronger during processing, and the formation of a larger rounding of electrolysis is facilitated. The unique hook-shaped design structure of the cathode rod 4 and the cathode head 5 is particularly suitable for electrolytic rounding of the cross orifices, particularly when the cross angle of the cross hole is an acute angle. In the experiment, the electrolytic rounding clamp for the crossed hole can ensure that the rounding of the crossed hole opening in the range of R0.5mm-R2m is carried out, and can also ensure the electrolytic surface roughness.
Claims (10)
1. A cross hole electrolytic rounding jig for rounding a cross hole opening of a cross hole of a to-be-machined member having a first hole and a second hole which cross each other, characterized in that: the electrolytic rounding fixture for the cross hole comprises a base, an insulating sleeve, a water inlet pipe, a cathode rod and a cathode head, wherein the base is used for being connected with a workpiece to be machined, and an inlet corresponding to the first hole and an outlet corresponding to the second hole are formed in the base; the insulating sleeve comprises an upper sleeve body and a lower sleeve body, the upper sleeve body is used for being connected with the base, and the lower sleeve body can extend into the first hole through the inlet; the water inlet pipe is connected to the insulating sleeve, the water inlet pipe is communicated with a central hole of the insulating sleeve, the central hole is used for conveying electrolyte input through the water inlet pipe to a cross hole of a cross hole on the workpiece to be machined, an opening communicated with the central hole is formed in the side wall of the lower end part of the lower sleeve body, the upper end of the cathode rod extends into the central hole, the upper end of the cathode rod is connected with the water inlet pipe, the cathode head is connected to the lower end of the cathode rod, and the end part of the cathode head extends out of the lower sleeve body through the opening; in use, the end of the cathode head is able to extend into the second hole through the cross bore of the cross hole in the workpiece to be machined.
2. The cross-hole electrolytic rounding jig according to claim 1, characterized in that: the cathode head is inclined upward from the root to the end.
3. The cross-hole electrolytic rounding clamp of claim 1, characterized in that: the positioning device is characterized by further comprising a positioning pin, wherein an upper positioning hole in interference fit with the positioning pin is formed in the upper sleeve body, and a lower positioning hole in clearance fit with the positioning pin is formed in the base.
4. The cross-hole electrolytic rounding jig according to claim 1, characterized in that: the upper end of centre bore is equipped with the internal thread, be equipped with on the inlet tube with internal thread complex external screw thread.
5. The cross-hole electrolytic rounding clamp of claim 1, characterized in that: the water inlet pipe, the cathode rod and the cathode head are all made of conductive materials.
6. The cross-hole electrolytic rounding jig according to claim 1, characterized in that: the base and the insulating sleeve are both made of insulating materials.
7. The cross-hole electrolytic rounding clamp of claim 1, characterized in that: the lower extreme of inlet tube is equipped with connecting portion, be equipped with the connecting hole that the opening is down on the connecting portion, the upper end of negative pole with connecting hole interference fit.
8. The cross-hole electrolytic rounding clamp of claim 1, characterized in that: the opening extends upwards from the lower end surface of the lower sleeve body.
9. The cross-hole electrolytic rounding jig according to claim 1, characterized in that: the diameter of the cathode head is larger than that of the cathode rod.
10. The cross-hole electrolytic rounding jig according to claim 1, characterized in that: the outer surface of the end part of the cathode head is a convex curved surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010780332.1A CN111843072B (en) | 2020-08-05 | 2020-08-05 | Crossover hole electrolysis radius anchor clamps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010780332.1A CN111843072B (en) | 2020-08-05 | 2020-08-05 | Crossover hole electrolysis radius anchor clamps |
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| Publication Number | Publication Date |
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| CN111843072A CN111843072A (en) | 2020-10-30 |
| CN111843072B true CN111843072B (en) | 2023-03-28 |
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| CN202010780332.1A Active CN111843072B (en) | 2020-08-05 | 2020-08-05 | Crossover hole electrolysis radius anchor clamps |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115770914B (en) * | 2022-11-23 | 2024-07-23 | 重庆红江机械有限责任公司 | Electrolytic rounding clamp for oil sprayer body |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101870018A (en) * | 2010-05-31 | 2010-10-27 | 重庆红江机械有限责任公司 | Electrochemical machining method of fuel nozzle spray orifice inner orifice and adopted electrochemical fixture |
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| JP3382982B2 (en) * | 1992-10-26 | 2003-03-04 | 株式会社ソディック | Machining fluid jet / suction device for electric discharge machine |
| JP4274026B2 (en) * | 2004-04-05 | 2009-06-03 | 株式会社デンソー | Electrolytic processing method |
| CN104827128A (en) * | 2015-06-03 | 2015-08-12 | 铜陵市永生机电制造有限责任公司 | Tool for manually removing burrs of cross hole |
| CN110625207B (en) * | 2019-09-23 | 2021-02-26 | 常州工学院 | Cathode tool and method for removing burrs of internal cross hole through electrolysis |
| CN111151829A (en) * | 2020-01-20 | 2020-05-15 | 常州工学院 | Electrolytic deburring device and method for deep and long crossed holes |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101870018A (en) * | 2010-05-31 | 2010-10-27 | 重庆红江机械有限责任公司 | Electrochemical machining method of fuel nozzle spray orifice inner orifice and adopted electrochemical fixture |
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