A fixture for friction welding

Abstract

The utility model provides a kind of clamp for friction welding, it is related to friction welding welding fixture technical field, the clamp for friction welding includes multiple second clamping jaw, the second clamping jaw is slidably connected in the sliding slot, the second clamping jaw and the first clamping jaw are spaced apart, the second clamping jaw bottom is provided with second clamping strip, the second clamping strip and the plane screw thread cooperation, the second clamping jaw includes slider and support rod, one end of the support rod is connected with the slider, the other end of the support rod extends to the direction of the clamping hole, the support rod has recess, spring and ball are arranged in the recess, one end of the spring is connected with the recess bottom wall, the other end of the spring is connected with the ball, the ball is at least partially located outside the recess, the clamp improves the concentricity of friction welding welded component, avoids the braking difficulty caused by welding spindle sudden stop.

Description

Technical Field

[0001] This utility model relates to the field of friction welding fixture technology, specifically to a friction welding fixture. Background Technology

[0002] Friction welding refers to the process where heat is generated through high-speed friction between the surfaces of two pipe fittings under pressure to form a weld. After the weld seam is formed between the two pipe fittings, the movement is stopped quickly to achieve the welding effect. It has advantages such as speed and flexibility, excellent welding quality, environmental benefits, no welding fumes or other gases produced, and production safety.

[0003] Currently, friction braking is achieved in the following ways when the shaft stops: 1. Braking; 2. Disc braking; 3. Magnetic braking; 4. Reverse braking. All of these methods stop the main shaft rotation. However, braking requires high technical skill and significant resistance. Furthermore, maintaining balance with the main shaft on a fixed secondary shaft is challenging, as it cannot achieve a reverse-motion servo mechanism to balance with the main shaft. Utility Model Content

[0004] The purpose of this invention is to overcome the defects of the prior art and provide a friction welding fixture that can correct the coaxiality and reduce the difficulty of instantaneous braking of the spindle.

[0005] To achieve the above and other objectives, this utility model is implemented through the following technical solution: This utility model provides a friction welding fixture, which includes: a chuck, the bottom of the chuck having a receiving cavity, a through hole provided on the side wall of the chuck, and a plurality of sliding grooves and clamping holes provided on the top of the chuck, the plurality of sliding grooves being arranged around the clamping holes;

[0006] The gear includes a gear body and a gear shaft connected together, one end of the gear shaft is located in the through hole, and the gear body is located in the receiving cavity;

[0007] A toothed disc is disposed within the receiving cavity. The bottom of the toothed disc has a rack that meshes with the gear body. The top of the toothed disc has a planar thread.

[0008] Multiple first grippers are slidably connected within the slide groove, and a first retaining strip is provided at the bottom of the first gripper, which engages with the planar thread.

[0009] The device includes multiple second grippers slidably connected within the groove. The second grippers are spaced apart from the first grippers. A second locking strip is provided at the bottom of the second gripper, and the second locking strip engages with the planar thread. The second gripper includes a slider and a support rod. One end of the support rod is connected to the slider, and the other end of the support rod extends toward the clamping hole. The support rod has a groove, and a spring and a ball are provided in the groove. One end of the spring is connected to the bottom wall of the groove, and the other end of the spring is connected to the ball. The ball is at least partially located outside the groove.

[0010] In one embodiment, the cross-sectional area of ​​the support rod is smaller than the cross-sectional area of ​​the slider.

[0011] In one embodiment, the toothed disc has an opening in the middle that communicates with the clamping hole.

[0012] In one embodiment, the number of the first grippers is three, and the number of the second grippers is three.

[0013] In one embodiment, the clamping surface of the first gripper is a plane.

[0014] In one embodiment, a rotating hole is provided at the top of the gear shaft.

[0015] In one embodiment, the first jaw and the second jaw are equidistantly distributed on the chuck.

[0016] In one embodiment, the diameter of the ball is smaller than the inner diameter of the groove.

[0017] In one embodiment, the second gripper includes a connecting post disposed in the inner cavity of the spring, the ball having a hollow structure, one end of the connecting post being connected to the bottom wall of the groove, and the other end of the connecting post being located within the hollow structure of the ball.

[0018] This utility model provides a fixture for friction welding. Compared with the prior art, this utility model has the following advantages: This application adopts a secondary shaft follower, which reduces the excessive resistance required when the main shaft is braked, and can still correct the coaxial concentricity when stopping at high speed, maintaining the relatively static and stable weld joint of friction welding, thus achieving the welding effect. It can correct concentricity, maintain the concentricity of the welded parts, reduce the difficulty of instantaneous braking of the main shaft, and achieve the ease of friction welding.

[0019] When the friction welding reaches the required welding level, the main spindle is braked while the first clamp is released. The second clamp can then flexibly clamp onto the welded part. Since the auxiliary shaft tube and the main shaft tube are welded together, the auxiliary shaft tube can reach a relatively stationary state due to the welding force and the simultaneous rotation of the main shaft tube. Attached Figure Description

[0020] Figure 1 The diagram shown is a structural schematic of the fixture of this utility model.

[0021] Figure 2 The image shown is an exploded view of the fixture of this utility model.

[0022] Figure 3 The diagram shown is a structural schematic of the gear and gear disc of this utility model.

[0023] Figure 4 The diagram shown is a partial structural schematic of the fixture of this utility model.

[0024] Figure 5 The diagram shown is a structural schematic of the toothed disc of this utility model.

[0025] Figure 6 The image shown is a cross-sectional view of the fixture of this utility model.

[0026] Reference numerals: 1-Chuck, 11-Receiving cavity, 12-Through hole, 13-Slide groove, 14-Connecting hole, 15-Clamping hole;

[0027] 2-Gear, 21-Gear body, 22-Gear shaft, 22a-Rotating hole;

[0028] 3-Gear disc, 31-Rack, 32-Flat thread, 33-Opening;

[0029] 4-First gripper, 41-First clamping bar, 42-Clamping surface;

[0030] 5-Second gripper, 51-Slider, 52-Support rod, 53-Spring, 54-Ball, 55-Groove, 56-Connecting post. Detailed Implementation

[0031] Please see Figures 1 to 6 The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0032] like Figure 1 , Figure 4 as well as Figure 6As shown, this utility model provides a fixture for friction welding. The fixture can be installed on a secondary shaft for friction welding. The secondary shaft can be used to clamp a workpiece to be welded, such as a metal pipe. During friction welding, the main shaft can clamp another workpiece and rotate at high speed. The workpiece clamped by the stationary secondary shaft generates heat through high-speed friction to complete the welding.

[0033] like Figure 1 , Figure 4 as well as Figure 6 As shown, the friction welding fixture includes a chuck 1 with an open receiving cavity 11 at its bottom. Multiple through holes 12, for example, three, are provided on the side wall of the chuck 1, and these through holes 12 communicate with the receiving cavity 11. A sliding groove 13 is provided on the top of the chuck 1; there may be six sliding grooves 13. A connecting hole 14 may be provided at the bottom of each sliding groove 13, and the connecting hole 14 may communicate with the receiving cavity 11. A clamping hole 15 is provided at one end of the sliding groove 13 near its center on the top of the chuck 1, and the sliding grooves 13 may be evenly distributed around the clamping hole 15.

[0034] like Figure 3 As shown, the friction welding fixture includes a gear 2, which comprises a gear body 21 and a gear shaft 22 connected together. One end of the gear shaft 22 is disposed within the through hole 12, and the gear body 21 is located within the receiving cavity 11. The gear 2 may have at least three gears, which allows the fixture to quickly and evenly release the weldment.

[0035] like Figure 6 As shown, a rotating hole 22a is provided on the gear shaft 22.

[0036] like Figure 2 and Figure 3 As shown, the friction welding fixture includes a geared disc 3, which is positioned above the gear 2 and within the receiving cavity 11. The geared disc 3 has a rack 31 at its bottom, and the gear body 21 meshes with the rack 31. A planar thread 32, which is helical, is provided on the top of the geared disc 3. An opening 33 communicating with the clamping hole 15 is provided in the middle of the geared disc 3. The pitch of the planar thread 32 can be equal.

[0037] like Figure 2As shown, the friction welding fixture includes three first jaws 4. One end of each first jaw 4 is disposed within the slide groove 13, and the first jaw 4 is slidably connected within the slide groove 13. The bottom of each first jaw 4 has a first retaining strip 41, which engages with the planar thread 32. The retaining surface 42 of the first jaw 4 near the retaining hole 15 is a rectangular plane.

[0038] like Figure 4 and Figure 6 As shown, the friction welding fixture includes a second jaw 5, which is spaced apart from the first jaw 4. The first jaw 4 and the second jaw 5 are equidistantly distributed on the chuck 1. One end of the second jaw 5 is disposed in the slide groove 13. The second jaw 5 includes a slider 51, and a second locking strip 51a is disposed at the bottom of the slider 51. The second locking strip 51a engages with the planar thread 32. The second jaw 5 includes a support rod 52, one end of which is connected to the slider 51, and the other end of which extends toward the center of the chuck 1. The support rod 52 has a groove 55, and the groove 55 is provided with... The chuck 54 has a spring 53 and a ball bearing 54, which can move within the groove 55. One end of the spring 53 is connected to the bottom wall of the groove 55, and the other end of the spring 53 is connected to the ball bearing 54. The ball bearing 54 is at least partially located outside the groove 55. In some embodiments, the volume of the ball bearing 54 outside the groove 55 is greater than the volume inside the groove 55. The diameter of the ball bearing 54 can be slightly smaller than the inner diameter of the groove 55. The outer end face of the ball bearing 54 is closer to the center of the chuck 1 relative to the clamping surface 42. The cross-sectional area of ​​the support rod 52 is smaller than the cross-sectional area of ​​the slider 51.

[0039] In some embodiments, the ball 54 is a hollow structure, and the first gripper 5 further includes a connecting post 56. The connecting post 56 is located in the inner cavity of the spring 53. One end of the connecting post 56 is connected to the bottom wall of the groove 55, and the other end of the connecting post 56 is located in the hollow structure of the ball 54. The connecting post 56 serves to stabilize the spring 53.

[0040] When this utility model is in operation, an external screw placed in the rotating hole 22a can be used to drive the gear shaft 22 of the gear 2 to rotate, thereby driving the gear body 21 to rotate, and causing the gear disk 3 to rotate. During the rotation of the gear disk 3, the top planar thread 32 also rotates continuously, causing the first locking bar 41 and the second locking bar 51a to move away from or close to the center of the chuck 1 on the chuck 1, thereby fixing one of the welding parts that needs to be welded.

[0041] Compared with existing chuck clamps, this invention adds a flexible second jaw 5. The second jaw 5 provides flexible clamping; during friction welding, the weldment can be clamped by the first jaw 4. At this time, the spring 53 in the second jaw 5 is compressed and provides auxiliary clamping. After friction welding is completed, an electrically operated, rapidly rotating wrench can be used as a clutch mechanism inserted into the rotating hole 22a to rotate the gear 2, causing the first jaw 4 and second jaw 5 to quickly retract. This allows the first jaw 4 to release quickly. When the claw 4 releases its grip on the weldment, the spring 53 in the second claw 5 can extend appropriately, which can simultaneously provide flexible clamping for the weldment. When the friction welding is completed, the main shaft of the friction welding can slowly rotate to the final stop state without abruptly stopping. The friction welding fixture installed in the secondary shaft can use the flexible clamping of the second claw 5 to make the weldment in the secondary shaft rotate together with the weldment clamped in the main shaft. This makes the main shaft and the secondary shaft reach a relatively stationary state, ensuring the concentricity of the welding and reducing the difficulty of stopping the main shaft instantly.

[0042] Therefore, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value. The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit this utility model. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A fixture for friction welding, characterized in that: The friction welding fixture includes: The chuck has a receiving cavity at its bottom, a through hole on its side wall, and multiple sliding grooves and clamping holes at its top, with the multiple sliding grooves arranged around the clamping holes. The gear includes a gear body and a gear shaft connected together, one end of the gear shaft is located in the through hole, and the gear body is located in the receiving cavity; A toothed disc is disposed within the receiving cavity. The bottom of the toothed disc has a rack that meshes with the gear body. The top of the toothed disc has a planar thread. Multiple first grippers are slidably connected within the slide groove, and a first retaining strip is provided at the bottom of the first gripper, which engages with the planar thread. The device includes multiple second grippers slidably connected within the groove. The second grippers are spaced apart from the first grippers. A second locking strip is provided at the bottom of the second gripper, and the second locking strip engages with the planar thread. The second gripper includes a slider and a support rod. One end of the support rod is connected to the slider, and the other end of the support rod extends toward the clamping hole. The support rod has a groove, and a spring and a ball are provided in the groove. One end of the spring is connected to the bottom wall of the groove, and the other end of the spring is connected to the ball. The ball is at least partially located outside the groove.

2. The friction welding fixture according to claim 1, characterized in that: The cross-sectional area of ​​the support rod is smaller than the cross-sectional area of ​​the slider.

3. The friction welding fixture according to claim 1, characterized in that: The toothed disc has an opening in the middle that communicates with the clamping hole.

4. The friction welding fixture according to claim 1, characterized in that: The number of the first gripper is three, and the number of the second gripper is three.

5. The friction welding fixture according to claim 1, characterized in that: The clamping surface of the first gripper is a plane.

6. The friction welding fixture according to claim 1, characterized in that: The top of the gear shaft is provided with a rotating hole.

7. The friction welding fixture according to claim 1, characterized in that: The first jaw and the second jaw are equidistantly distributed on the chuck.

8. The friction welding fixture according to claim 1, characterized in that: The diameter of the ball is smaller than the inner diameter of the groove.

9. The friction welding fixture according to claim 1, characterized in that: The second gripper includes a connecting post disposed in the inner cavity of the spring. The ball has a hollow structure. One end of the connecting post is connected to the bottom wall of the groove, and the other end of the connecting post is located inside the hollow structure of the ball.

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