CN113478066A - Follow-up fixture for friction stir processing of surface of valve plate of gate valve and follow-up control method - Google Patents
Follow-up fixture for friction stir processing of surface of valve plate of gate valve and follow-up control method Download PDFInfo
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- CN113478066A CN113478066A CN202110813568.5A CN202110813568A CN113478066A CN 113478066 A CN113478066 A CN 113478066A CN 202110813568 A CN202110813568 A CN 202110813568A CN 113478066 A CN113478066 A CN 113478066A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/26—Auxiliary equipment
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Abstract
A follow-up fixture for friction stir processing of the surface of a valve plate of a gate valve and a follow-up control method are characterized by comprising an upper pressing device, a lower pressing device, a bearing, a motor, a gear, a bottom plate, a pressing plate, an information processor and the like. Before processing, the valve plate is firstly positioned on the bottom plate, then the bearing is arranged on the mounting ring of the bottom plate, then the upper pressing device and the lower pressing device are fixed together and arranged on the outer ring of the bearing, simultaneously, the gear in the lower pressing device is matched with the gear connected with the motor, and then the upper pressing device and the lower pressing device are pressed by the pressing plate. During processing, the information processor automatically calculates the rotating speed of the upper pressing device and the lower pressing device which are matched with the stirring head through the motion track of the stirring head, and drives the upper pressing device and the lower pressing device to move through the motor, thereby constantly providing a motion space for the motion of the stirring head. The invention is easy to realize and convenient to control, and can carry out friction stir processing on the surface of the whole valve plate.
Description
Technical Field
The invention belongs to the field of special fixtures, in particular to a stirring friction welding fixture, and specifically relates to a follow-up fixture for stirring friction machining of a gate valve plate surface and a follow-up control method.
Background
The valve plate is the key part in the gate valve, and destruction such as corruption, wearing and tearing easily take place in long-term use, can directly influence the life of gate valve after the valve plate produces destruction such as corruption, wearing and tearing. The surface of the valve plate is modified by adopting a friction stir processing technology, so that the performances of corrosion resistance, wear resistance and the like of the surface of the valve plate can be effectively improved, and the service life of the valve plate is prolonged. Because the stirring head needs to continuously move to different positions on the surface of the valve plate when the surface of the valve plate is subjected to stirring friction processing, and the universal fixture in the conventional stirring friction equipment cannot meet the requirement on continuous processing of the whole surface of the valve plate, a follow-up fixture for stirring friction processing of the surface of the valve plate of the gate valve needs to be designed, and an effective control method is provided to enable the motion of the follow-up fixture and the motion of the stirring head to be synchronously carried out.
Disclosure of Invention
The invention aims to provide a follow-up fixture for friction stir processing of the surface of a valve plate of a gate valve and a follow-up control method, aiming at the problem that a universal fixture in friction stir processing equipment cannot continuously process the whole surface of the valve plate.
One of the technical schemes of the invention is as follows:
a follow-up fixture for friction stir processing of the surface of a gate valve plate mainly comprises an upper pressing device, a lower pressing device, a bearing, a motor, a gear, an installation ring, a fixed V-shaped block, a telescopic short cylindrical pin, a movable V-shaped block, a pressing plate, an information processor and the like.
The upper pressing device is of a circular structure, an upper connecting hole, a pressing groove and an ejection groove are designed on the upper pressing device, the upper connecting hole is used for being connected with the lower pressing device, the pressing groove is used for positioning when the pressing plate is pressed, and the ejection groove is used for positioning when the upper pressing device is ejected.
The utility model discloses a valve plate, including lower closing device, lower connecting hole, movable hole, plain bearing and installation hole, the gear is used for the gear cooperation that links to each other with the motor to carry out the transmission down among the closing device, the connecting hole is used for linking to each other with last closing device down, the movable hole is used for providing the motion space for the stirring head, the width of movable hole is greater than the diameter of stirring head, the whole length in movable hole is greater than the radius of valve plate, plain bearing is located closing device's bottom surface down, makes and goes up closing device and still can rotate on the valve plate upper surface under the circumstances that is compressed tightly, the installation hole is used for cooperating with the bearing inner race.
The motor is connected with the gear, the gear is matched with a gear in the lower pressing device, and the motor is used for driving the lower pressing device to rotate.
The telescopic short cylindrical pin comprises a base, a mounting hole and a short cylindrical pin, wherein the mounting hole is used for fixing the telescopic short cylindrical pin on the clamp bottom plate, and the short cylindrical pin can extend out of or retract into the base.
The pressure plate is provided with a connecting hole, an anti-skid pattern and a plane bearing, the connecting hole is used for connecting with an automatic clamping mechanism 17, the automatic clamping mechanism can move up and down, the valve plate can be pressed down downwards, the valve plate can be disassembled upwards, the anti-skid pattern is used for preventing skid when the upper and lower pressure devices are ejected upwards and acts in an ejection groove of the upper pressure device, and the plane bearing is used for pressing the upper and lower pressure devices on the valve plate and still enabling the upper and lower pressure devices to rotate and act in a compression groove of the upper pressure device.
The information processor is used for collecting motion trail data of the stirring head from the stirring friction processing equipment system, automatically calculating the rotating speed of the pressing device matched with the motion of the stirring head, and driving the pressing device to rotate through the motor and the gear, and the information processor can feed the motion trail of the stirring head back to the motor in real time, so that the motion of the stirring head and the rotation of the pressing device are synchronously carried out, and the accurate control of the clamp follow-up device is realized.
The second technical scheme of the invention is as follows:
a follow-up control method for friction stir processing of the surface of a valve plate of a gate valve is characterized by comprising the following steps of: firstly, mounting a bearing inner ring on a mounting ring of a base plate, fixing an upper pressing device and a lower pressing device together through a bolt group, then positioning a valve plate, namely, firstly, putting the valve plate on a clamp base plate and contacting with a fixed V-shaped block 11, then partially extending a cylindrical pin of a telescopic short cylindrical pin 12 into a radial hole in the valve plate, then pushing a movable V-shaped block 13 to contact with the outer circular surface of the valve plate, then sleeving the fixed upper pressing device and the fixed lower pressing device into a bearing outer ring and meshing a gear in the lower pressing device with a gear connected with a motor, then pressing a pressing plate to press a pressing groove of the upper pressing device, and finally positioning a stirring head to the center of the valve plate; during formal processing, the information processor automatically calculates the rotating speed of the motor matched with the feeding speed F, x and the y coordinate of the stirring head for circular motion by continuously acquiring the feeding speed and the y coordinate, and synchronously transmits the rotating speed to the motor, and the pressing device is driven by the motor to rotate, so that a processing space is provided for the motion of the stirring head, and the follow-up automatic control of the clamp is realized.
When the stirring head moves on the surface of the valve plate, the information processor can acquire the advancing speed F of the stirring head in circular motion and the coordinates x and y of the stirring head moving on the horizontal plane, the origin of coordinates is arranged at the center of a circle of the valve plate, and the stirring head meets the following formula when moving:
wherein:
the angular velocity of the stirring head in the circular motion on the surface of the valve plate.
The following can be obtained:
to ensure that the mixing head has sufficient movement space in the movable hole of the lower pressing device, the lower pressing device should rotate synchronously at the same angular speed while the mixing head makes a circular movement, i.e. the mixing head rotates synchronously at the same angular speed
The peripheral speed v of the gear wheel in the lower press at its pitch circle1Can be expressed as:
wherein:
r is the pitch circle radius of the gear in the lower press.
If the peripheral speed v of the gear in the lower pressing device is ensured1The rotational angular velocity of the gear connected to the motor
Can be expressed as:
wherein: and r is the radius of a reference circle of a gear connected with the motor.
Speed n of the motor and
the relationship between them is:
the following can be obtained:
therefore, after acquiring the forward speed F of the stirring head in circular motion and the coordinates x and y of the stirring head in motion on the plane of the valve plate, the information processor can calculate the motor rotating speed n when the lower pressing device and the stirring head move synchronously through a formula (6), and transmits the value to the motor, so that the motor drives the lower pressing device to rotate, the information processor continuously acquires the F, x and y of the stirring head in motion, processes the F, x and y and feeds back the F, x and y to the motor, and the synchronous motion of the lower pressing device and the stirring head is realized.
The invention has the beneficial effects that:
1. the invention continuously provides a motion space for the friction stir processing of the stirring head by utilizing the principle that the clamp pressing device automatically rotates along with the motion trail of the stirring head, and the pressing device can rotate while pressing the valve plate, thereby realizing the requirement of friction stir processing on the complete surface of the valve plate of the gate valve.
2. The follow-up control method of the clamp is simple, the control process adopts gear transmission, the transmission process is stable and easy to realize, and the synchronous control of the pressing device can be completed according to the movement of the stirring head.
3. The function of the invention can be realized by improving the original universal workbench of the friction stir equipment, the valve plate is simple to mount and dismount, and the operation in the machining process is simple.
Drawings
FIG. 1 is an overall exploded view of a follow-up jig and a follow-up control method for friction stir processing of the surface of a valve plate of a gate valve.
Fig. 2 is a top view of the upper compression device.
Fig. 3 is a bottom view of the upper compressing device.
Figure 4 is a top view of the lower compaction device.
Fig. 5 is a bottom view of the hold-down device.
Fig. 6 is a schematic view of a telescopic short cylindrical pin.
FIG. 7 is a top schematic view of a platen.
FIG. 8 is a bottom view of the platen.
FIG. 9 is a diagram of the overall assembly effect of the follow-up jig and the follow-up control method for friction stir processing of the surface of the valve plate of the gate valve according to the present invention.
FIG. 10 is a schematic diagram of an embodiment of a path and follow-up calculation.
Reference numbers in the figures: the device comprises a main shaft 1, a stirring head 2, an upper pressing device 3, an upper connecting hole 31, a 32 pressing ejection groove, a lower pressing device 4, a gear 41, a lower connecting hole 42, a movable hole 43, a planar bearing 44, an inner mounting hole 45, a bearing 5, a valve plate 6, a motor 7, a gear 8, a bottom plate 9, a mounting ring 10, a fixed V-shaped block 11, a telescopic short cylindrical pin 12, a 121 base, a 122 mounting hole 123, a short cylindrical pin 123, a movable V-shaped block 13, a pressing plate 14, a connecting hole 141, an anti-slip pattern 142, a planar bearing 143, an information processor 15, a circular motion track A, a linear motion track B, a circular motion track C, a linear motion track D and a circular motion track E.
Detailed Description
In order to make the object and technical solution of the present invention more intuitive and clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "left", "right", "bottom", "top", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
As shown in fig. 1-10.
A follow-up fixture for friction stir processing of the surface of a gate valve plate comprises an upper pressing device 3, a lower pressing device 4, a bearing 5, a motor 7, a gear 8, a mounting ring 10, a fixed V-shaped block 11, a telescopic short cylindrical pin 12, a movable V-shaped block 13, a pressing plate 14 and an information processor 15, wherein the upper pressing device 3 and the lower pressing device 4 are connected together through bolts and are mounted on the outer ring of the bearing 5, the inner ring of the bearing 5 is mounted on the mounting ring 10, the pressing plate 14 is mounted on an automatic clamping mechanism 17 and can move up and down under the driving of the automatic clamping mechanism 17 to press and loosen the upper pressing device 3, the automatic clamping mechanism 17 is mounted on a base 16, the automatic clamping mechanism 17 can be realized by adopting a lifting air cylinder or a hydraulic cylinder, the pressing plate 14 is driven to descend when in pressing, the automatic clamping mechanism 17 drives the pressing plate 14 to ascend after processing is finished, the lower pressing device 4 and the valve plate 6 are loosened to facilitate taking out the valve plate; the lower pressing device 4 connected with the upper pressing device 3 is pressed on the valve plate 6 through a bearing 44 on the lower pressing device, the upper pressing device 3 and the lower pressing device 4 not only press the valve plate 6 but also can move relative to the valve plate 6, and the valve plate 6 is fixed on the bottom plate 9; the stirring head 2 is driven by the main shaft 1 to move, and the stirring head 2 passes through the through hole of the upper pressing device 3 and the movable hole 43 of the lower pressing device 4 to act on the valve plate 6; the gear 8 is driven by a motor 7, the motor 7 and the spindle 1 are controlled by an information processor 15, the gear 8 is matched with a gear 41 in the lower pressing device 4, as shown in figure 1, and the assembly structure is as shown in figure 9.
In specific implementation, the upper pressing device 3 is provided with an upper connecting hole 31 and a pressing ejection groove 32, as shown in fig. 2 and 3. The lower pressing device 4 is provided with a gear 41 for matching transmission with the gear 8, a lower connecting hole 42 for assembling with the upper pressing device 3, a movable hole 43 for processing movement of the stirring head, as shown in fig. 4, a plane bearing 44 for rotating the lower pressing device 4 on the upper surface of the valve plate 6 and an installation inner hole 45 for assembling with an outer ring of the bearing 5, as shown in fig. 5; the movable holes 43 are distributed along the radial direction from the center of the lower pressing device 4, the length of the movable holes is larger than the radius of the valve plate, and the width of the movable holes is larger than the diameter of the stirring head; the flat bearing 44 is arranged around the periphery of the movable hole 43. The gear 41 is meshed with the gear 8, the motor 7 is connected with the gear 8 and drives the gear 8 to rotate, and the motor 7 is arranged on the base 16 through a bracket. The valve plate 6 is positioned on the bottom plate 9 and located in the installation ring 10 through the fixed V-shaped block 11, the movable V-shaped block 13 and the retractable short cylindrical pin 12, the fixed V-shaped block 11 and the retractable short cylindrical pin 12 are fixed on the bottom plate 9, the movable V-shaped block 13 is also installed on the bottom plate 9, the movable V-shaped block 13 can be pushed to move radially by adopting a screw nut, the retractable short cylindrical pin 12 is structured as shown in fig. 6 and comprises a base 121, an installation hole 122 and a short cylindrical pin 123, the installation hole 122 is used for fixing the base 121 on the bottom plate 9, and the short cylindrical pin 123 can extend out or retract into the base 121 (adopting a common spring pin structure). The structure of the pressing plate 14 is shown in dispute 7, 8, and it is designed with a connection hole 141, a skidproof pattern 142 and a plane bearing 143, the connection hole 141 is used to connect with the automatic clamping mechanism 17, the skidproof pattern 142 is used to skidproof when the upper pressing device 3 is ejected upwards, the plane bearing 143 is used to press the upper pressing device 3 on the valve plate 6 and still make it rotate, the skidproof pattern 142 is used to act on the upper top surface of the pressing ejecting groove 32, the plane bearing 143 is used to act on the lower bottom surface of the pressing ejecting groove 32. The information processor 15 (equivalent to a PLC controller or a computer controller, software can be programmed by using a conventional technique) is configured to collect motion trajectory data of the stir head 2 from the friction stir processing device system, automatically calculate a rotation speed of the lower pressing device 4 adapted to the motion of the stir head 2, and drive the lower pressing device 4 to rotate through the motor 7 and the gear 8, so that the movable hole 43 in the lower pressing device 4 can move and rotate along with the stir head 2, and perform feedback update according to a new motion position of the stir head 2 to determine a real-time rotation speed of the lower pressing device 4, thereby ensuring that the motion of the stir head 2 is synchronous with the rotation of the lower pressing device 4, and enabling the stir head 2 to perform continuous processing at different positions of the valve plate 6.
The follow-up control method of the invention comprises the following steps:
when the surface of the valve plate 6 is subjected to friction stir processing, firstly, the inner ring of the bearing 5 is installed on the installation ring 10, and then the upper pressing device 3 and the lower pressing device 4 are fastened together through the upper connecting hole 31 and the lower connecting hole 42 by using a bolt group; then the valve plate 6 is positioned on the bottom plate 9, the specific positioning process is that the valve plate 6 is firstly flatly placed on the clamp bottom plate 9, the outer circular surface of the left side of the valve plate 6 is contacted with the fixed V-shaped block 11, then the short cylindrical pin 123 of the telescopic short cylindrical pin 12 extends out and is inserted into a radial hole in the middle of the valve plate 6, and finally the movable V-shaped block 13 is pushed to be contacted with the outer circular surface of the right side of the valve plate 6 to complete positioning; then, the upper pressing device 3 and the lower pressing device 4 which are fastened together are installed into the outer ring of the bearing 5 through an installation inner hole 45 at the bottom surface of the lower pressing device 4, and simultaneously, the gear 41 and the gear 8 in the lower pressing device 4 are matched; the pressing ejection groove 32 in the upper pressing device 3 is then pressed by the plane bearing 143 at the bottom of the pressing plate 14, so that the follow-up jig is clamped. The overall effect of the assembled follower fixture is shown in fig. 9.
The details are as follows:
according to an embodiment provided by the present invention, the upper pressing device 3 is a circular ring structure, and is designed with upper connection holes 31 and pressing and ejecting grooves 32, the connection holes 31 are uniformly distributed along the circumferential direction of the upper pressing device 3, the width of the pressing and ejecting grooves 32 is slightly larger than the diameter of the planar bearing 143 on the bottom surface of the pressing plate 14, and the pressing and ejecting grooves 32 can be used for positioning when the pressing plate 14 presses, and also can be used for positioning when the pressing plate 14 ejects the upper pressing device 3.
According to one embodiment of the present invention, the lower pressing device 4 is designed with a gear 41, a lower connecting hole 42, a movable hole 43, a plane bearing 44 and an inner mounting hole 45, the gear 41 is matched with a gear 8, the gear 8 is driven by a motor 7, the reference circle radius of the gear 41 is R, the radius of the reference circle of the gear 8 is r, the lower connecting hole 42 is used for connecting with the upper hold-down device 3, the movable hole 43 is used for providing a space for processing the stirring head 2, the position of the movable hole 43 can rotate along with the movement of the stirring head 2 in the following process, the width of the movable hole 43 is larger than the diameter of the stirring head 2, the whole length of the movable hole 43 is larger than the radius of the valve plate 6, the plane bearing 44 is used for pressing the pressing ejection groove 32 of the upper pressing device 3, so that the upper pressing device 3 can rotate while being pressed, and the mounting inner hole 45 is used for being mounted on an outer ring of the bearing 5.
According to an embodiment provided by the invention, the retractable short cylindrical pin 12 comprises a base 121, a mounting hole 122 and a short cylindrical pin 123, wherein the mounting hole 122 is used for fixing the retractable short cylindrical pin 12 on the clamp bottom plate 9, and the short cylindrical pin 123 can extend or retract into the base 121.
According to an embodiment of the present invention, the pressing plate is designed with a connection hole 141, an anti-slip pattern 142 and a plane bearing 143, the connection hole 141 is used for connecting with an automatic clamping mechanism, the automatic clamping mechanism 17 can move up and down, can press the valve plate 6 downwards, and can detach the valve plate 6 upwards, the anti-slip pattern 142 is used for preventing slipping when the upper pressing device 3 and the lower pressing device 4 are ejected upwards and acts on the top edge of the pressing ejection groove 32 of the upper pressing device 3, and the plane bearing 143 is used for pressing the upper pressing device 3 and the lower pressing device 4 on the valve plate 6 and still enabling the upper pressing device 3 and the lower pressing device 4 to rotate and act in the pressing ejection groove 32 of the upper pressing device 3.
According to an embodiment of the present invention, the information processor 15 is configured to collect data of a motion trajectory of the stir head 2 in the friction stir processing device system, automatically calculate a rotation speed of the lower clamping device 4 corresponding to the motion of the stir head 2, and drive the lower clamping device 4 to rotate through the motor 7 and the gear 8, and the information processor 15 may continuously update the motion trajectory of the stir head 2 and feed back the updated motion trajectory to the motor 7 in real time, so that the motion of the stir head 2 and the rotation of the lower clamping device 4 are performed synchronously, thereby implementing precise control of the fixture follower, and a control process is provided below by combining a specific processing process and a processing parameter.
When the surface of the valve plate 6 is modified by the stirring head 2, the feed path can be offset outwards by circular motion, as shown in fig. 10, the feed path is: a (circular motion trajectory-B (linear motion trajectory) -C (circular motion trajectory) -D (linear motion trajectory) -E (circular motion trajectory) ….
When the stirring head 2 performs the circular motion at the feeding speed F =200 mm/min, if the position coordinate of the stirring head 2 is (50 mm ), the seat is setStandard origin pointOThe angular velocity of the stirring head 2 in the circular motion can be obtained according to the formula (2) when the valve plate is positioned at the center of the circle of the valve plate 6
Comprises the following steps:
if the movable opening 43 in the lower press 4 is to be moved synchronously with the mixing head 2, the rotational angular speed of the lower press 4 is adjusted
Should be in accordance with
Similarly, if the pitch circle radius R =200 mm of the gear 41 in the lower press device 4, the linear velocity at the pitch circle of the gear 41 is set to be equal to or lower than the reference value
Can be expressed as:
if the pitch circle radius r =50 mm of the gear 8, the angular velocity of the gear 8 is determined
Can be expressed as:
speed n of the motor 7 and
the relationship between them is:
the following can be obtained:
therefore, when the information processor 15 adjusts the rotation speed of the motor 7 to
The synchronous rotation of the lower pressing device 4 and the stirring head 2 can be realized. When the position coordinates (x, y) of the motion of the stirring head 2 are changed, the corresponding rotating speed of the motor 7 can be calculated according to the same steps, and the information processor 15 updates the rotation of the driving motor 7 in real time.
When the stirring head 2 moves in a linear track, the motor 7 stops rotating, the lower pressing device 4 is static, and the stirring head 2 moves along the length direction of the movable hole 43 in the lower pressing device 4. And after the stirring head 2 finishes all the cutting tracks, the stirring friction processing on the surface of the valve plate 6 can be finished.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
The present invention is not concerned with parts which are the same as or can be implemented using prior art techniques.
Claims (8)
1. The utility model provides a follow-up anchor clamps that is used for gate valve plate surface friction stir processing which characterized in that: the device comprises an upper pressing device (3), a lower pressing device (4), a bearing (5), a motor (7), a gear (8), an installation ring (10), a fixed V-shaped block (11), a telescopic short cylindrical pin (12), a movable V-shaped block (13), a pressing plate (14) and an information processor (15), wherein the upper pressing device (3) and the lower pressing device (4) are connected together through bolts and are installed on the outer ring of the bearing (5), the inner ring of the bearing (5) is installed on the installation ring (10), the pressing plate (14) is installed on an automatic clamping mechanism (17) and can move up and down under the driving of the automatic clamping mechanism to press and loosen the upper pressing device (3), and the automatic clamping mechanism (17) is installed on a base (16); the lower pressing device (4) connected with the upper pressing device (3) is pressed on the valve plate (6) through a bearing (44) on the lower pressing device, the upper pressing device (3) and the lower pressing device (4) not only press the valve plate (6) but also can move relative to the valve plate (6), and the valve plate (6) is fixed on the bottom plate (9); the stirring head (2) is driven by the main shaft (1) to move, and the stirring head (2) passes through the through hole of the upper pressing device (3) and the movable hole (43) of the lower pressing device (4) to act on the valve plate (6); the gear (8) is driven by a motor (7), the motor (7) and the spindle (1) are both controlled by an information processor (15), and the gear (8) is matched with a gear (41) in the lower pressing device (4).
2. The follow-up jig for friction stir processing of the surface of the valve plate of the gate valve according to claim 1, wherein: an upper connecting hole (31) and a pressing ejection groove (32) are formed in the upper pressing device (3).
3. The follow-up jig for friction stir processing of the surface of the valve plate of the gate valve according to claim 1, wherein: the lower pressing device (4) is internally provided with a gear (41) which is used for being matched with the gear (8) for transmission, a lower connecting hole (42) which is used for being assembled with the upper pressing device (3), a movable hole (43) which is used for processing and moving a stirring head, a plane bearing (44) which is used for enabling the lower pressing device (4) to rotate on the upper surface of the valve plate (6) and an installation inner hole (45) which is used for being assembled with the outer ring of the bearing (5); the movable holes (43) are distributed along the radial direction from the center of the lower pressing device (4), the length of the movable holes is larger than the radius of the valve plate, and the width of the movable holes is larger than the diameter of the stirring head; a flat bearing (44) is disposed around the periphery of the movable hole (43).
4. The follow-up jig for friction stir processing of the surface of the valve plate of the gate valve according to claim 1, wherein: the motor (7) is connected with the gear (8) and drives the gear (8) to rotate, and the motor (7) is installed on the base (16) through a support.
5. The follow-up jig for friction stir processing of the surface of the valve plate of the gate valve according to claim 1, wherein: the telescopic short cylindrical pin (12) is provided with a base (121), a mounting hole (122) and a short cylindrical pin (123), the mounting hole (122) is used for fixing the telescopic short cylindrical pin (12) on the bottom plate (9), and the short cylindrical pin (123) can extend out or retract into the base (121).
6. The follow-up jig for friction stir processing of the surface of the valve plate of the gate valve according to claim 1, wherein: the anti-skidding valve is characterized in that a connecting hole (141), an anti-skidding pattern (142) and a plane bearing (143) are designed in the pressing plate (14), the connecting hole (141) is used for being connected with the automatic clamping mechanism (17), the anti-skidding pattern (142) is used for preventing skidding when the upper pressing device (3) is ejected upwards, the plane bearing (143) is used for enabling the upper pressing device (3) to rotate when the upper pressing device (3) is pressed on the valve plate (6), the anti-skidding pattern (142) acts on the upper edge of the pressing ejection groove (32) when working, and the plane bearing (143) acts on the lower edge of the pressing ejection groove (32) when working.
7. The follow-up jig for friction stir processing of the surface of the valve plate of the gate valve according to claim 1, wherein: the information processor (15) is used for collecting motion track data of the stirring head (2) from the stirring friction processing equipment system and automatically calculating the rotating speed of the lower pressing device (4) adaptive to the motion of the stirring head (2), and the lower pressing device (4) is driven to rotate through the motor (7) and the gear (8), so that the movable hole (43) in the lower pressing device (4) can move and rotate along with the stirring head (2), and meanwhile, feedback updating is carried out according to the new motion position of the stirring head (2) to determine the real-time rotating speed of the lower pressing device (4), so that the motion of the stirring head (2) is synchronous with the rotation of the lower pressing device (4), and the stirring head (2) can carry out continuous processing on different positions of the valve plate (6).
8. A follow-up control method for friction stir processing of the surface of a valve plate of a gate valve is characterized by comprising the following steps of: firstly, mounting a bearing inner ring on a mounting ring of a bottom plate, fixing an upper pressing device and a lower pressing device together through a bolt group, and then positioning a valve plate, namely, firstly, putting the valve plate on a clamp bottom plate and contacting with a fixed V-shaped block (11), then, extending a cylindrical pin part of a telescopic short cylindrical pin (12) into a radial hole in the valve plate, then pushing a movable V-shaped block (13) to contact with the outer circular surface of the valve plate, then, sleeving the fixed upper pressing device and the lower pressing device into a bearing outer ring, meshing a gear in the lower pressing device with a gear connected with a motor, then, pressing a pressing groove of the upper pressing device by using a pressing plate, and finally, positioning a stirring head to the center of the valve plate; during formal processing, the information processor automatically calculates the rotating speed of the motor matched with the feeding speed F, x and the y coordinate of the stirring head for circular motion by continuously acquiring the feeding speed and the y coordinate, and synchronously transmits the rotating speed to the motor, and the pressing device is driven by the motor to rotate, so that a processing space is provided for the motion of the stirring head, and the follow-up automatic control of the clamp is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110813568.5A CN113478066B (en) | 2021-08-20 | 2021-08-20 | Follow-up fixture for friction stir processing of surface of valve plate of gate valve and follow-up control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110813568.5A CN113478066B (en) | 2021-08-20 | 2021-08-20 | Follow-up fixture for friction stir processing of surface of valve plate of gate valve and follow-up control method |
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