Auxiliary clamping tool for machining of herringbone link

Abstract

The application provides an auxiliary clamping tool for processing an arc tooth joint link, which comprises a base, a lateral positioning seat arranged on the upper end of the base, a lateral stopper, a positioning vertical plate, a secondary vertical plate and a longitudinal stopper, the lower end of one side of the lateral positioning seat is provided with a V-shaped positioning seat, the lateral stopper is arranged outside the V-shaped positioning seat and moves towards the lateral positioning seat to laterally position the arc tooth joint link clamped on the V-shaped positioning seat, the positioning vertical plate is vertically arranged at one end of the V-shaped positioning seat, the secondary vertical plate is vertically arranged at the other end of the V-shaped positioning seat, a stopper bolt is threadedly connected to the upper end of the secondary vertical plate, the arc tooth joint link clamped on the V-shaped positioning seat can be transversely positioned by the stopper bolt, the longitudinal stopper is transversely arranged on the side of the lateral positioning seat facing the V-shaped positioning seat and can be inserted into the opening of the arc tooth joint link to longitudinally position the arc tooth joint link, the position and angle error of the arc tooth joint link during clamping is reduced, and the machining precision is improved.

Description

Technical Field

[0001] This invention relates to the field of arc tooth chain link processing technology, and specifically to an auxiliary clamping fixture for arc tooth chain link processing. Background Technology

[0002] Arc-tooth chain links are important components used in connecting circular link chains in mining, playing a crucial role, especially in heavy machinery such as scraper conveyors and coal planers. An arc-tooth chain link mainly consists of two identical arc-shaped semi-rings and a fixing pin. The arc-shaped semi-rings are designed with both internal and external tooth systems. Each tooth system has concave and convex arcs, and each tooth direction also has an arc. This structure greatly increases the contact area between the two semi-rings, thereby enhancing the strength and stability of the chain link.

[0003] In existing technologies, the machining accuracy of the teeth on the arc-shaped semi-rings of the arc-tooth connecting link has always been a challenge in the manufacturing of connecting links. Due to its irregular shape, it requires multiple processes. The machining of internal teeth uses internal tooth jigs and internal tooth cutters, while the machining of external teeth uses external tooth jigs and external tooth cutters. This requires repeated clamping of the arc-tooth connecting link using internal and external tooth jigs. However, the existing internal and external tooth jigs will have certain differences in clamping angle and position during repeated clamping, which reduces the machining accuracy of the external and internal teeth of the arc-tooth connecting link. This can easily lead to insufficient meshing between the arc-shaped semi-rings of the two arc-tooth connecting links, and consequently, the teeth of the arc-tooth connecting link are prone to breakage during use due to uneven stress. Summary of the Invention

[0004] In view of this, it is necessary to provide an auxiliary clamping fixture for machining arc tooth chain links, so as to solve the technical problem that the large clamping angle and position errors in the existing technology result in low machining accuracy of the outer and inner teeth of the arc tooth chain links.

[0005] The technical solution adopted by this invention to solve its technical problem is:

[0006] An auxiliary clamping fixture for machining arc-tooth chain links includes a base, a lateral positioning seat, a lateral stop, a positioning plate, a secondary plate, and a longitudinal stop, all disposed on the upper end of the base. A V-shaped positioning seat for clamping the arc-tooth chain link is provided at the lower end of one side of the lateral positioning seat. The lateral stop is disposed outside the V-shaped positioning seat, directly opposite it, and is movable towards the lateral positioning seat, forming a clamping force to clamp and fix the arc-tooth chain link clamped on the V-shaped positioning seat from both sides. The positioning plate is vertically disposed at one end of the V-shaped positioning seat and extends upward along the end of the V-shaped positioning seat. The auxiliary upright plate is vertically installed at the other end of the V-shaped positioning seat, directly opposite the positioning upright plate. A stop bolt is threadedly connected to the upper end of the auxiliary upright plate. The axial direction of the stop bolt is directly opposite the positioning upright plate, and it can rotate and move towards the positioning upright plate to push the arc-tooth connecting chain ring, which is stuck on the V-shaped positioning seat, towards the positioning upright plate, forming a clamping force between them. The longitudinal stop member is horizontally installed on the side of the lateral positioning seat facing the V-shaped positioning seat and extends towards the V-shaped positioning seat. It can pass through the opening of the arc-tooth connecting chain ring, which is stuck on the V-shaped positioning seat, and can move downward to press the arc-tooth connecting chain ring onto the V-shaped positioning seat.

[0007] Preferably, the lateral positioning seat has an upwardly extending positioning side plate vertically arranged at one end facing the positioning plate. The positioning side plate is located inside the positioning plate and is flush with the side surface of the contact arc tooth chain link of the lateral positioning seat, and close to the positioning plate.

[0008] Preferably, the lateral positioning seat has an upwardly extending sub-side plate vertically arranged at one end facing the sub-upper plate. The sub-side plate is located inside the sub-upper plate and is flush with the side surface of the contact arc tooth chain link of the lateral positioning seat.

[0009] Preferably, the lateral positioning seat has an adjustment groove on the upper surface of one end of the sub-side plate. The adjustment groove is parallel to the positioning side plate. The lower end of the sub-side plate is provided with a retaining seat that matches the adjustment groove. The retaining seat is engaged in the adjustment groove and moves along the adjustment groove toward the positioning side plate to adjust the distance between the sub-side plate and the positioning side plate. A locking bolt is provided at the upper end of the retaining seat. The locking bolt passes through the retaining seat and can abut against the adjustment groove to lock the sub-side plate.

[0010] Preferably, the lateral stop includes a first stop arm, a second stop arm, and two lateral clamping hydraulic cylinders. The first stop arm and the second stop arm are vertically arranged on the outside of the V-shaped positioning seat. The upper end of the first stop arm is directly opposite the positioning side plate, and the upper end of the second stop arm is directly opposite the sub-side plate. The two lateral clamping hydraulic cylinders are horizontally arranged on the base. The telescopic shafts of the two lateral clamping hydraulic cylinders are respectively oriented towards the lateral stop and are respectively connected to the lower ends of the first stop arm and the second stop arm. The two lateral clamping hydraulic cylinders simultaneously drive the first stop arm and the second stop arm to move towards the lateral positioning seat, so that a mutual clamping force is formed between the first stop arm and the positioning side plate, and between the second stop arm and the sub-side plate, so as to clamp and fix the two sides of the arc-tooth connecting chain ring clamped on the V-shaped positioning seat.

[0011] Preferably, the lower ends of the first stop arm and the second stop arm are rotatably connected to the telescopic shaft of the lateral clamping hydraulic cylinder, and the first stop arm and the second stop arm are respectively able to rotate around the telescopic shaft of the lateral clamping hydraulic cylinder.

[0012] Preferably, the longitudinal stop includes a pressure seat, a lifting hydraulic cylinder, and a pressure column. The lateral positioning seat has a slot longitudinally formed on the side facing the V-shaped positioning seat, with the slot directly opposite the middle of the V-shaped positioning seat. The pressure seat is engaged in the slot and can slide up and down along the slot. The lifting hydraulic cylinder is longitudinally positioned at the lower end of the lateral positioning seat. The telescopic arm of the lifting hydraulic cylinder passes through the lateral positioning seat and extends into the slot, connecting with the pressure seat. The pressure column is transversely positioned on the pressure seat and can extend transversely along the pressure seat into the opening of the arc-tooth connecting chain ring engaged on the V-shaped positioning seat. The lifting hydraulic cylinder drives the pressure seat to move up and down along the slot. When moving downward, the pressure column can press the arc-tooth connecting chain ring engaged on the V-shaped positioning seat onto the V-shaped positioning seat.

[0013] Preferably, the pressure seat has several insertion holes spaced laterally along the opening direction of the adjustment groove on the side facing the V-shaped positioning seat, and one end of the pressure column can be inserted into any one of the insertion holes.

[0014] Preferably, the V-shaped positioning seat consists of two triangular pads, which are arranged opposite each other to form a V-shaped groove, and the distance between the two triangular pads is adjustable.

[0015] Preferably, the other side of the lateral positioning seat is also symmetrically provided with a V-shaped positioning seat, a lateral stop, a positioning upright plate, a secondary upright plate, and a positioning side plate, which can simultaneously fix two arc-tooth connecting chain rings of the same specification. The slot is opened through both sides of the lateral positioning seat, and the insertion hole is opened through both sides of the pressure seat. There are two pressure columns, which are respectively inserted into the insertion holes on both sides of the pressure seat to simultaneously press down the arc-tooth connecting chain rings fixed on both sides of the lateral positioning seat. The secondary side plate is vertically set at the upper end of the lateral positioning seat, and the two ends of the secondary side plate are flush with the side surfaces of the lateral positioning seat on both sides where the V-shaped positioning seat is set.

[0016] As can be seen from the above technical solution, the auxiliary clamping fixture for machining the arc-tooth chain link provided in this application includes a base, a lateral positioning seat, a lateral stop, a positioning plate, a secondary plate, and a longitudinal stop. A V-shaped positioning seat for clamping the arc-tooth chain link is provided at the lower end of one side of the lateral positioning seat. The lateral stop is located outside the V-shaped positioning seat and faces it directly. The lateral stop can move towards the lateral positioning seat to laterally position the arc-tooth chain link clamped on the V-shaped positioning seat. The positioning plate is vertically positioned at one end of the V-shaped positioning seat and extends upward along the end of the V-shaped positioning seat. The secondary plate is vertically positioned at the other end of the V-shaped positioning seat and faces it directly. A stop bolt is threadedly connected to the upper end of the secondary plate, allowing the chain link clamped on the V-shaped positioning seat to be clamped. The arc-tooth connecting ring on the V-shaped positioning seat faces the positioning plate, providing lateral positioning for the arc-tooth connecting ring. The longitudinal stop is laterally positioned on the side of the lateral positioning seat facing the V-shaped positioning seat and extends towards the V-shaped positioning seat. It can pass through the opening of the arc-tooth connecting ring that is locked on the V-shaped positioning seat and can move downwards to press the arc-tooth connecting ring onto the V-shaped positioning seat, thus providing longitudinal positioning for the arc-tooth connecting ring. In this way, the arc-tooth connecting ring can be stably fixed on the base, improving the stability of the arc-tooth connecting ring during processing. Furthermore, the positions of the lateral positioning seat and the positioning plate are fixed. Each time the ring is clamped, it is fixed close to the lateral positioning seat and the positioning plate, thereby reducing the position and angle errors when the arc-tooth connecting ring is clamped again, and thus improving the processing accuracy of the outer and inner teeth of the arc-tooth connecting ring. Furthermore, this auxiliary clamping fixture does not require repeated clamping of the same arc-tooth connecting link. After a single clamping is completed, the machining center can complete the machining processes on each mating surface, effectively ensuring product accuracy, improving product quality, and accelerating product manufacturing efficiency. Attached Figure Description

[0017] Figure 1 This is a side view of the invention.

[0018] Figure 2 This is a three-dimensional structural diagram of the invention.

[0019] Figure 3 This is a three-dimensional structural diagram of the invention from another angle.

[0020] Figure 4 This is a schematic diagram of the lateral stop structure of the invention.

[0021] Figure 5 This is a schematic diagram of the structure of the invention, which includes a clamping arc-tooth connecting chain link.

[0022] Figure 6 This is a schematic diagram of another angle of the structure for clamping the arc-tooth connecting chain link of the invention.

[0023] Figure 7 , Figure 8 This is a three-dimensional structural diagram of another preferred embodiment of the invention.

[0024] Figure 9 This is a top view of another preferred embodiment of the invention.

[0025] Figure 10 This is a schematic diagram of the structure of the invention in another preferred embodiment, which simultaneously clamps two arc-tooth connecting links.

[0026] In the figure: base 10, lateral positioning seat 20, positioning side plate 21, secondary side plate 22, adjusting groove 23, card seat 24, locking bolt 25, card slot 26, lateral stop 30, first stop arm 31, second stop arm 32, lateral clamping hydraulic cylinder 33, positioning upright plate 40, secondary upright plate 50, stop bolt 51, pressure plate 52, longitudinal stop 60, pressure seat 61, lifting hydraulic cylinder 62, pressure column 63, insertion hole 64, V-shaped positioning seat 70, adjusting bolt 71. Detailed Implementation

[0027] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Please refer to Figures 1 to 3This invention provides an auxiliary clamping fixture for machining arc-tooth chain links, including a base 10, a lateral positioning seat 20 disposed on the upper end of the base 10, a lateral stop 30, a positioning plate 40, a secondary plate 50, and a longitudinal stop 60. The base 10 is fixed on the worktable of a fully automatic CNC vertical machining center. The lateral positioning seat 20 is fixedly disposed in the middle of the upper surface of the base 10. A V-shaped positioning seat 70 for clamping the arc-tooth chain link is disposed at the lower end of one side of the lateral positioning seat 20. The V-shaped positioning seat 70 is composed of... The base 10 is composed of two triangular pads, which are arranged opposite each other and fixed to the upper surface of the base 10, forming an upward-opening V-shaped groove. The lateral stop 30 is arranged on the outside of the V-shaped positioning seat 70, and is directly opposite to the lateral positioning seat 20. The lateral stop 30 can move towards the lateral positioning seat 20, forming a clamping force between them to clamp and fix the two sides of the arc-tooth chain link that is stuck on the V-shaped positioning seat 70. The positioning plate 40 is erected at one end of the V-shaped positioning seat 70. The positioning plate 40 extends upward along the end of the V-shaped positioning seat 70 and is perpendicular to the base 10. The secondary plate 50 is erected at the other end of the V-shaped positioning seat 70, directly opposite the positioning plate 40. A stop bolt 51 is threadedly connected to the upper end of the secondary plate 50. The stop bolt 51 passes through the secondary plate 50 and is axially aligned with the positioning plate 40. A pressure plate 52 is provided at the end of the stop bolt 51 facing the positioning plate 40. By manually rotating the stop bolt 51, it can be moved towards the positioning plate 40. The pressure plate 52 pushes the arc-tooth connecting chain ring, which is clamped on the V-shaped positioning seat 70, toward the positioning plate 40. The pressure plate 52 and the positioning plate 40 form a clamping force between them. The longitudinal stop 60 is laterally arranged on the side of the lateral positioning seat 20 facing the V-shaped positioning seat 70 and extends toward the V-shaped positioning seat 70. The longitudinal stop 60 can pass into the opening of the arc-tooth connecting chain ring clamped on the V-shaped positioning seat 70 and can move vertically downward along the lateral positioning seat 20 to press the arc-tooth connecting chain ring onto the V-shaped positioning seat 70.

[0029] Please continue reading. Figure 2 and Figure 3To improve the applicability of processing arc-tooth connecting links of different specifications, a positioning side plate 21 extending upward is vertically provided at one end of the lateral positioning seat 20 facing the positioning plate 40. The positioning side plate 21 is located inside the positioning plate 40 and is flush with the side surface of the lateral positioning seat 20 that contacts the arc-tooth connecting link, and is close to the positioning plate 40. A secondary side plate 22 extending upward is vertically provided at one end of the lateral positioning seat 20 facing the secondary plate 50. The secondary side plate 22 is located inside the secondary plate 50 and is flush with the side surface of the lateral positioning seat 20 that contacts the arc-tooth connecting link. The height of the positioning plate 40 is lower than the height of the connecting arm with internal teeth on the machined arc-tooth chain link. The positioning side plate 21 is the same height as the positioning plate 40 and is integrally formed with the positioning plate 40. The positioning side plate 21 and the positioning plate 40 form an L-shaped stop at the end of the lateral positioning seat 20. The positioning side plate 21 is used to laterally stop the upper end of the connecting arm with internal teeth on the arc-tooth chain link to prevent it from tilting towards the lateral positioning seat 20. The height of the secondary side plate 22 is lower than the height of the connecting arm with external teeth on the machined arc-tooth chain link. The secondary side plate 22 is used to laterally stop the upper end of the connecting arm with external teeth on the arc-tooth chain link to prevent it from tilting towards the lateral positioning seat 20.

[0030] Please refer to Figure 5 and Figure 6When clamping and fixing the arc-tooth connecting link to be processed, the open end of the arc-tooth connecting link faces upward, the connecting arm of the arc-tooth connecting link that needs to have internal teeth faces the positioning plate 40, and the connecting arm of the arc-tooth connecting link that needs to have external teeth faces the auxiliary plate 50. The arc-tooth connecting link is inserted into the V-groove of the V-shaped positioning seat 70, so that it is placed close to the lateral positioning seat 20, and the connecting arm of the arc-tooth connecting link that needs to have internal teeth rests on the positioning side plate 21, and the connecting arm of the arc-tooth connecting link that needs to have external teeth rests on the auxiliary side plate 22. The longitudinal stop 60 is inserted into the opening of the arc-tooth connecting link; the V-groove limits the lower end of the arc-tooth connecting link; the lateral stop 30 is laterally positioned. The seat 20 moves closer together, and the lateral stop 30 presses the arc-tooth connecting chain ring against the side wall of the lateral positioning seat 20, restricting the lateral movement of the arc-tooth connecting chain ring. The longitudinal stop 60 moves downward, pressing the arc-tooth connecting chain ring into the V-groove, restricting the longitudinal movement of the arc-tooth connecting chain ring. The stop bolt 51 is rotated and moves towards the positioning plate 40. The pressure plate 52 at the end of the stop bolt 51 abuts against the outside of the connecting arm with external teeth of the arc-tooth connecting chain ring, bringing the arc-tooth connecting chain ring against the positioning plate 40, so that the connecting arm with internal teeth of the arc-tooth connecting chain ring is close to the positioning plate 40, thereby restricting the lateral movement of the arc-tooth connecting chain ring. Thus, through the cooperation of the lateral positioning seat 20, the lateral stop 30, the positioning plate 40, the auxiliary plate 50, and the longitudinal stop 60, the six directions of the arc-tooth connecting chain to be processed can be restricted, namely, up, down, left, right, front, and back, and it can be stably fixed on the base 10, thereby improving the stability of the arc-tooth connecting chain during the processing. Furthermore, since the positions of the lateral positioning seat 20 and the positioning plate 40 are fixed, the arc-tooth connecting chain is fixed close to the lateral positioning seat 20 and the positioning plate 40 each time it is clamped, thereby reducing the position and angle error when the arc-tooth connecting chain is clamped a second time, and thus improving the processing accuracy of the outer and inner teeth of the arc-tooth connecting chain.

[0031] Please refer to Figures 2 to 4Specifically, the lateral stop 30 includes a first stop arm 31, a second stop arm 32, and two lateral clamping hydraulic cylinders 33. The first stop arm 31 and the second stop arm 32 are vertically arranged on the outside of the V-shaped positioning seat 70. The upper end of the first stop arm 31 is flush with and directly opposite the positioning side plate 21, and the upper end of the second stop arm 32 is flush with and directly opposite the auxiliary side plate 22. The two lateral clamping hydraulic cylinders 33 are horizontally arranged on the base 10. The telescopic shafts of the two lateral clamping hydraulic cylinders 33 are respectively oriented towards the lateral stop 30 and are respectively connected to the lower ends of the first stop arm 31 and the second stop arm 32, clamping and fixing the arc-tooth chain link to be processed. At a set time, the two lateral clamping hydraulic cylinders 33 simultaneously drive the first stop arm 31 and the second stop arm 32 to move towards the lateral positioning seat 20. The first stop arm 31 presses the connecting arm with the inner teeth of the arc-tooth connecting chain ring against the positioning side plate 21, forming a mutual clamping force between them, thus clamping and fixing the connecting arm with the inner teeth of the arc-tooth connecting chain ring. The second stop arm 32 presses the connecting arm with the outer teeth of the arc-tooth connecting chain ring against the auxiliary side plate 22, forming a mutual clamping force between them, thus clamping and fixing the connecting arm with the outer teeth of the arc-tooth connecting chain ring. The first stop arm 31 and the second stop arm 32 laterally fix the arc-tooth connecting chain ring, restricting its lateral movement.

[0032] Please continue reading. Figure 1 and Figure 2 The longitudinal stop 60 includes a pressure seat 61, a lifting hydraulic cylinder 62, and a pressure column 63. The lateral positioning seat 20 has a longitudinally formed groove 26 on the side facing the V-shaped positioning seat 70. The groove 26 is centrally located, directly opposite the middle of the V-shaped positioning seat 70. The pressure seat 61 is engaged in the groove 26 and can slide up and down along it. The lifting hydraulic cylinder 62 is longitudinally positioned at the lower end of the lateral positioning seat 20. The telescopic arm of the lifting hydraulic cylinder 62 passes through the lateral positioning seat 20 and extends into the groove 26, where it is fixedly connected to the pressure seat 61. The pressure seat 61 faces the V-shaped positioning seat. A socket 64 is provided on one side of the seat 70. The socket 64 is parallel to the direction of the lateral stop 30. One end of the pressure column 63 is detachably inserted into the socket 64, and the other end of the pressure column 63 extends laterally into the opening of the arc tooth connecting chain ring inserted on the V-shaped positioning seat 70. The lifting hydraulic cylinder 62 drives the pressure seat 61 to move up and down along the slot 26 in the opening of the arc tooth connecting chain ring. When moving downward, the pressure column 63 can press the arc tooth connecting chain ring inserted on the V-shaped positioning seat 70 onto the V-shaped positioning seat 70, thereby fixing the arc tooth connecting chain ring longitudinally.

[0033] The lower ends of the first stop arm 31 and the second stop arm 32 are rotatably sleeved to the telescopic shaft of the lateral clamping hydraulic cylinder 33. The first stop arm 31 and the second stop arm 32 can rotate around the telescopic shaft of the lateral clamping hydraulic cylinder 33 to both ends of the V-shaped positioning seat 70. When clamping the arc tooth connecting chain ring, the first stop arm 31 and the second stop arm 32 can be rotated to both ends of the V-shaped positioning seat 70 so that the V-shaped positioning seat 70 is fully open on the side facing the first stop arm 31 and the second stop arm 32, so that the arc tooth connecting chain ring can be inserted into the V-shaped positioning seat 70.

[0034] Please refer to Figure 2 or Figure 6 Furthermore, to facilitate the clamping of arc-tooth chain links of different specifications using this auxiliary clamping fixture, an adjustment groove 23 is provided on the upper surface of one end of the secondary side plate 22 of the lateral positioning seat 20. The adjustment groove 23 is parallel to the positioning side plate 21. A retaining seat 24 matching the adjustment groove 23 is provided at the lower end of the secondary side plate 22. The retaining seat 24 is engaged in the adjustment groove 23 and moves along the adjustment groove 23 towards the positioning side plate 21 to adjust the distance between the secondary side plate 22 and the positioning side plate 21. A locking bolt 25 is provided at the upper end of the retaining seat 24. The locking bolt 25 passes through the retaining seat 24 and abuts against the adjustment groove 23 to lock the secondary side plate 22. A plurality of insertion holes 64 are provided at intervals along the opening direction of the adjustment groove 23 on the side of the pressure seat 61 facing the V-shaped positioning seat 70. One end of the pressure post 63 can be inserted into any one of the insertion holes 64. When clamping and fixing arc-tooth connecting links of different specifications, the position of the secondary side plate 22 can be adjusted according to the distance between the two connecting arms with external and internal teeth on the arc-tooth connecting link, so that the distance between the secondary side plate 22 and the positioning side plate 21 matches the distance between the two connecting arms of the arc-tooth connecting link to be processed. The second stop arm 32 can rotate accordingly according to the position of the secondary side plate 22. Similarly, the pressure column 63 can also be inserted into the corresponding insertion hole 64 according to the opening position of the arc-tooth connecting link to be processed.

[0035] Please refer to Figure 3 The two triangular pads of the V-shaped positioning seat 70 are arranged opposite each other. One of the triangular pads is fixedly set on the base 10 close to the positioning plate 40, and the other triangular pad is installed on the base 10 by adjusting bolt 71. The position of the triangular pad can be manually adjusted towards the positioning plate 40 according to the specifications of the arc tooth chain link to be processed, so as to adjust the distance between the two triangular pads.

[0036] Please refer to Figures 7 to 10In a preferred embodiment, the other side of the lateral positioning seat 20 is also symmetrically provided with a V-shaped positioning seat 70, a lateral stop 30, a positioning upright plate 40, a secondary upright plate 50, and a positioning side plate 21. The secondary side plate 22 is vertically arranged at the upper end of the lateral positioning seat 20, and the two ends of the secondary side plate 22 are respectively flush with the side surfaces of the lateral positioning seat 20 where the V-shaped positioning seat 70 is located. The slot 26 is opened through both sides of the lateral positioning seat 20 where the V-shaped positioning seat 70 is located. The insertion hole 64 is opened through both sides of the pressure seat 61. There are two pressure columns 63, which are respectively inserted into the insertion holes 64 on both sides of the pressure seat 61. In this way, when clamping and fixing the arc tooth connecting chain ring to be processed, two arc tooth connecting chain rings of the same specification can be clamped on both sides of the lateral positioning seat 20 at the same time and fixed side by side to improve processing efficiency.

[0037] The above-disclosed embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the invention. Those skilled in the art will understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present invention are still within the scope of the invention.

Claims

1. An auxiliary clamping fixture for machining arc-tooth chain links, characterized in that: The system includes a base, a lateral positioning seat, a lateral stop, a positioning plate, a secondary plate, and a longitudinal stop. The lower end of one side of the lateral positioning seat is provided with a V-shaped positioning seat for engaging the arc-tooth chain link. The lateral stop is located outside the V-shaped positioning seat, directly opposite it, and can move towards the lateral positioning seat, forming a clamping force to clamp and fix the arc-tooth chain link engaged on both sides of the V-shaped positioning seat. The positioning plate is vertically positioned at one end of the V-shaped positioning seat and extends upward along the end of the V-shaped positioning seat. The secondary plate is vertically positioned... The auxiliary plate is set at the other end of the V-shaped positioning seat, directly opposite the positioning plate. A stop bolt is threadedly connected to the upper end of the auxiliary plate. The axial direction of the stop bolt is directly opposite the positioning plate and can rotate and move towards the positioning plate to push the arc toothed chain ring stuck on the V-shaped positioning seat towards the positioning plate, forming a clamping force between them. The longitudinal stop is set laterally on the side of the lateral positioning seat facing the V-shaped positioning seat and extends towards the V-shaped positioning seat. It can pass through the opening of the arc toothed chain ring stuck on the V-shaped positioning seat and can move downward to press the arc toothed chain ring onto the V-shaped positioning seat. The lateral positioning seat has an upwardly extending positioning side plate vertically arranged at one end facing the positioning upright plate. The positioning side plate is located inside the positioning upright plate and is flush with the side surface of the contact arc tooth chain link of the lateral positioning seat, and is close to the positioning upright plate. The lateral positioning seat has an upwardly extending sub-side plate vertically arranged at one end facing the sub-upper plate. The sub-side plate is located inside the sub-upper plate and is flush with the side surface of the contact arc tooth chain link of the lateral positioning seat. The lateral positioning seat has an adjustment groove on the upper surface of one end of the sub-side plate. The adjustment groove is parallel to the positioning side plate. The lower end of the sub-side plate is provided with a retaining seat that matches the adjustment groove. The retaining seat is engaged in the adjustment groove and moves along the adjustment groove toward the positioning side plate to adjust the distance between the sub-side plate and the positioning side plate. A locking bolt is provided at the upper end of the retaining seat. The locking bolt passes through the retaining seat and can abut against the adjustment groove to lock the sub-side plate. The lateral stop includes a first stop arm, a second stop arm, and two lateral clamping hydraulic cylinders. The first and second stop arms are vertically arranged on the outside of the V-shaped positioning seat. The upper end of the first stop arm is directly opposite the positioning side plate, and the upper end of the second stop arm is directly opposite the sub-side plate. The two lateral clamping hydraulic cylinders are horizontally arranged on the base. The telescopic shafts of the two lateral clamping hydraulic cylinders are respectively oriented towards the lateral stop and connected to the lower ends of the first and second stop arms. The two lateral clamping hydraulic cylinders simultaneously drive the first and second stop arms to move towards the lateral positioning seat, so that a mutual clamping force is formed between the first stop arm and the positioning side plate, and between the second stop arm and the sub-side plate, to clamp and fix the two sides of the arc-tooth connecting chain ring clamped on the V-shaped positioning seat.

2. The auxiliary clamping fixture for machining arc-tooth chain links as described in claim 1, characterized in that: The lower ends of the first stop arm and the second stop arm are rotatably connected to the telescopic shaft of the lateral clamping hydraulic cylinder, and the first stop arm and the second stop arm can rotate around the telescopic shaft of the lateral clamping hydraulic cylinder.

3. The auxiliary clamping fixture for machining arc-tooth chain links as described in claim 2, characterized in that: The longitudinal stop includes a pressure seat, a lifting hydraulic cylinder, and a pressure column. The lateral positioning seat has a slot longitudinally opened on the side facing the V-shaped positioning seat, and the slot is directly opposite the middle of the V-shaped positioning seat. The pressure seat is engaged in the slot and can slide up and down along the slot. The lifting hydraulic cylinder is longitudinally arranged at the lower end of the lateral positioning seat. The telescopic arm of the lifting hydraulic cylinder passes through the lateral positioning seat and extends into the slot, connecting with the pressure seat. The pressure column is transversely arranged on the pressure seat and can extend transversely along the pressure seat into the opening of the arc-tooth connecting chain ring engaged on the V-shaped positioning seat. The lifting hydraulic cylinder drives the pressure seat to move up and down along the slot. When moving downward, it can press the arc-tooth connecting chain ring engaged on the V-shaped positioning seat onto the V-shaped positioning seat through the pressure column.

4. The auxiliary clamping fixture for machining arc-tooth chain links as described in claim 3, characterized in that: The pressure base has several insertion holes spaced laterally along the direction of the adjustment groove on the side facing the V-shaped positioning base, and one end of the pressure column can be inserted into any one of the insertion holes.

5. The auxiliary clamping fixture for machining arc-tooth chain links as described in claim 4, characterized in that: The V-shaped positioning seat consists of two triangular pads, which are arranged opposite each other to form a V-shaped groove. The distance between the two triangular pads is adjustable.

6. The auxiliary clamping fixture for machining arc-tooth chain links as described in claim 5, characterized in that: The other side of the lateral positioning seat is also symmetrically provided with a V-shaped positioning seat, a lateral stop, a positioning upright plate, a secondary upright plate, and a positioning side plate, which can simultaneously fix two arc-tooth connecting chain rings of the same specification. The slot is opened through both sides of the lateral positioning seat, and the insertion hole is opened through both sides of the pressure seat. There are two pressure columns, which are respectively inserted into the insertion holes on both sides of the pressure seat to simultaneously press down the arc-tooth connecting chain rings fixed on both sides of the lateral positioning seat. The secondary side plate is vertically set at the upper end of the lateral positioning seat, and the two ends of the secondary side plate are flush with the side surfaces of the lateral positioning seat on both sides where the V-shaped positioning seat is set.

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