A multi-station fork welding device and method

Abstract

The present application belongs to the technical field of welding, and particularly relates to a multi-station fork welding device and method, which comprises a machine body, an electrode welding head arranged on the machine body, a positioning die base assembly arranged outside the electrode welding head, the positioning die base assembly comprising a die holder, a welding avoidance groove arranged on the outer side of the die holder, a fork mouth support member and a fork tail positioning member fixed on the die holder at intervals, a pushing handle mechanism and a fork mouth clamping mechanism arranged outside the positioning die base assembly at intervals, and a second air cylinder arranged inside the machine body, wherein the fork mouth clamping mechanism is used for providing support force for the fork mouth of the workpiece under the pushing action of the second air cylinder, so as to reduce the plastic skew of the fork mouth of the workpiece. In the resistance heating type welding process, the present application provides clamping force for the fork mouth, the welding area and the fork tail of the workpiece in multiple stations, can reduce the degree of plastic skew of the fork mouth, and solves the problem that the size of the finished product fork mouth exceeds the tolerance range.

Description

Technical Field

[0001] This invention belongs to the field of welding technology, specifically relating to a multi-station fork welding device and method. Background Technology

[0002] The shift fork is a key component for gear shifting. During shifting, it engages with the synchronizer or gear via a U-shaped fork and moves, thereby changing the gear ratio and completing the shift. In manufacturing, it is formed by welding two curved fork rods together to create the U-shaped fork.

[0003] In existing welding equipment, when processing shift forks, two arc-shaped forks serve as workpieces, clamped by a fixture or pressed down by a pressure plate driven by a drive element, completing the loading process. After loading, the electrodes of the welding equipment contact the welding area, utilizing the enormous resistance heat generated when current passes through the workpiece itself and the contact resistance heat, and under applied pressure, melting and joining the metal in the welding area. However, in the actual welding process, the following areas still urgently need improvement: 1. In the electrode resistance heating welding process, the welding area of ​​the clamped workpiece forms a high-temperature molten pool through resistance heating. However, the high temperature of this molten pool area will significantly reduce the yield strength and rigid support of the material at the root of the fork. Under the combined action of welding stress and clamping force, it is easy to cause plastic distortion of the fork, which will eventually cause the finished fork size to exceed the tolerance range and the accuracy to fail to meet the design requirements.

[0004] 2. If a cylinder is used to directly clamp the fork, the high-temperature radiation, metal spatter, and sparks generated during welding will directly affect the cylinder's piston rod, seals, and air pipes, as the clamping position is close to the welding area. This thermal damage will accelerate the aging and erosion of the sealing elements, leading to problems such as cylinder leakage, sluggish operation, and even a sudden drop in clamping force. Summary of the Invention

[0005] The purpose of this invention is to provide a multi-station fork welding device and method, which can provide clamping force for the fork opening, welding area and fork tail of the workpiece in multiple stations during resistance heating welding process, thereby reducing the degree of plastic distortion of the fork opening and solving the problem of finished fork opening dimensions exceeding the tolerance range.

[0006] The specific technical solution adopted by this invention is as follows: A multi-station shift fork welding device includes a body and an electrode welding head disposed on the body, and further includes: The positioning mold base assembly is disposed outside the electrode welding head. The positioning mold base assembly includes a mold support, a welding clearance groove opened on the outside of the mold support, a fork support member fixed at intervals on the mold support, and a fork tail positioning member. The pusher handle mechanism and the fork clamping mechanism are spaced apart outside the positioning mold base assembly; The second cylinder is located inside the machine body; The fork clamping mechanism is used to provide support force for the workpiece fork under the pushing action of the second cylinder, thereby reducing the plastic skew of the workpiece fork. The pusher handle mechanism is used to push the workpiece laterally along the electrode welding head and clamp it on the mold support and fork tail positioning part, so that the welding area of ​​the workpiece is aligned with the electrode welding head in the welding avoidance groove.

[0007] As an optional solution, the fork clamping mechanism includes a first support plate and a third pressure plate spaced apart outside the positioning mold base assembly, and a first adjusting bolt is threaded through the third pressure plate; The third pressure plate is used to provide support force for the workpiece fork in different directions with the first support plate under the pushing action of the second cylinder. The first adjusting bolt extends out of the length of the third pressure plate to adjust the width of the workpiece fork clamped by the first support plate and the third pressure plate.

[0008] As an alternative, the end of the first pallet is inclined at less than 15° and has anti-slip teeth on the slope, and the end of the third pressure plate extends in a raised shape toward the anti-slip teeth and has a heat insulation groove on the raised shape. The anti-slip teeth are used to avoid designated points on the workpiece and, together with the protrusions of the third pressure plate, clamp the workpiece fork at multiple angles.

[0009] As an optional solution, a fork tail clamping mechanism is also included, which includes a second support plate and a fourth pressure plate spaced apart outside the positioning mold base assembly, and a second adjusting bolt is threaded through the end of the fourth pressure plate; The fourth pressure plate is used to provide support for the tail of the workpiece vertically along the welding clearance groove under the pushing action of the second cylinder, and the second adjusting bolt extends out of the length of the fourth pressure plate to adjust the height limit of the fourth pressure plate clamping the tail of the workpiece.

[0010] As an alternative, the thickness of the fourth pressure plate in the middle is greater than the thickness of its two ends, and the middle part is hinged to the positioning mold base assembly. The hinge point between the fourth pressure plate and the positioning mold base assembly is used as a fulcrum to support the tail of the workpiece under the pushing action of the second cylinder.

[0011] As an optional solution, the second tray and the fourth pressure plate are respectively provided with a second heat dissipation hole and a third heat dissipation hole; The second and third heat dissipation holes are used to dissipate heat through heat exchange with the air during workpiece welding, thereby reducing the heat transferred to the second cylinder by the second support plate and the fourth pressure plate.

[0012] As an alternative, the pusher handle mechanism includes a pusher handle, a hinge, and a movable arm that are sequentially hinged along the transverse side of the positioning mold base assembly, and a first pressure plate and a second pressure plate are detachably mounted on the movable arm; The first and second pressure plates are used to press against the workpiece under the thrust of the movable arm and to avoid the electrode welding head from both sides.

[0013] As an optional solution, a first bolt connector is provided between the movable arm and the first pressure plate, and a second bolt connector is provided between the first pressure plate and the second pressure plate; The first bolt connector and the second bolt connector are used to replace the first pressure plate and the second pressure plate.

[0014] As an alternative, the positioning mold assembly is welded with a hinge seat for the hinged fork clamping mechanism; The two fork clamping mechanisms form a group, which is used to vertically straighten the fork clamping mechanisms along the positioning mold base assembly.

[0015] A multi-station shift fork welding method, using the multi-station shift fork welding device as described, includes the following steps: Material preparation: The first cylinder lifts the upper electrode and places the workpiece into the space between the positive and negative electrodes; Workpiece positioning: The second cylinder is activated. Under the push of the second cylinder, the fork clamping mechanism provides support for the fork of the workpiece and also provides support for the fork tail of the workpiece. At the same time, the operator rotates the pusher handle mechanism to push the workpiece laterally along the electrode welding head, so that the welding area of ​​the workpiece is aligned with the electrode welding head in the welding area, thus completing the loading. Workpiece clamping: The first cylinder lowers the upper electrode until the upper and lower electrodes clamp the workpiece; Welding: The upper and lower electrodes are connected to the power supply. The huge resistance heat and contact resistance heat generated when the current passes through the workpiece itself are used to melt and join the metal in the welding area under pressure to obtain the welded part. Unloading: The operator reverses the pusher handle mechanism to control the first cylinder to open the gap between the upper and lower electrodes, and the second cylinder drives the fork clamping mechanism to release the welded part, which can be manually removed.

[0016] The technical effects achieved by this invention are as follows: This invention provides a resistance heating welding device that provides clamping force to the fork opening, welding area, and fork tail of the workpiece at multiple stations during the welding process of a fork. This reduces the degree of plastic distortion of the fork opening and solves the problem of the finished fork opening dimensions exceeding the tolerance range. The cylinder is positioned away from the welding area to prevent high-temperature radiation, metal spatter, and sparks generated during welding from directly affecting the piston rod, sealing ring, and air pipe of the cylinder, thus ensuring that the cylinder can continuously provide clamping force.

[0017] This invention provides a resistance heating welding device. At the clamping station, anti-slip serrations and ramps are specifically designed for the lower edge of the workpiece fork, ensuring that the serrations and ramps conform to the curved surface of the workpiece fork. The anti-slip serrations avoid interference with the workpiece's pivot points, preventing the workpiece fork from loosening during welding.

[0018] This invention provides a resistance heating welding device, in which two different adjusting bolts are added to the clamping station. By changing the extension length of the adjusting bolts, the height of the clamping fork opening and fork tail can be changed, making it easy to adapt to workpieces of different sizes and meet various process requirements. Attached Figure Description

[0019] Figure 1 This is a front view of a multi-station shift fork welding device according to Embodiment 1 of the present invention; Figure 2 This is the invention Figure 1 A side view of a multi-station shift fork welding device; Figure 3 This is the invention Figure 1 Front view of the welding station; Figure 4 This is the invention Figure 1 Side view of the welding station in the middle; Figure 5 This is the invention Figure 1 Top view of the welding station; Figure 6 This is the invention Figure 3 Front view of the central positioning mold base assembly and the pusher handle mechanism; Figure 7 This is the invention Figure 3 Top view of the center positioning mold base assembly and the push handle mechanism; Figure 8 This is the invention Figure 3 Front view of the fork clamping mechanism and the fork tail clamping mechanism; Figure 9 This is the invention Figure 8 A schematic diagram of the clamping direction of the center shift fork; Figure 10 This is the invention Figure 9 A schematic diagram of the first pallet supporting the fork opening; Figure 11 This is the invention Figure 9 A schematic diagram of the third pressure plate supporting the fork opening; Figure 12 This is the invention Figure 9 A schematic diagram of the second pallet supporting the fork opening; Figure 13 This is the invention Figure 3 Schematic diagram of the welded finished product of the middle shift fork; Figure 14 This is a system block diagram of the controller of the present invention; Figure 15 This is a flowchart of a multi-station shift fork welding method according to Embodiment 2 of the present invention.

[0020] The attached diagram lists the components represented by each number as follows: 1. Organism; 2. First cylinder; 3. Electrode welding head; 4. Positioning mold base assembly; 401. Support column; 402. Mold support; 403. Fork support component; 404. Welded clearance groove; 405. Fork tail positioning component; 406. Limit bolt; 407. Hinge seat; 408. First heat dissipation hole; 409. Cooling water pipe; 5. Limiting fork; 6. Push handle mechanism; 601. Push handle; 602. Hinge; 603. Movable arm; 604. First bolt connector; 605. First pressure plate; 606. Second bolt connector; 607. Second pressure plate; 7. Second cylinder; 8. Fork clamping mechanism; 801. First support plate; 802. Anti-slip teeth; 803. Third pressure plate; 804. Heat insulation groove; 805. First adjusting bolt; 9. Fork tail clamping mechanism; 901. Second support plate; 902. Second heat dissipation hole; 903. Fourth pressure plate; 904. Second adjusting bolt; 905. Third heat dissipation hole. Detailed Implementation

[0021] To make the objectives and advantages of this invention clearer, the invention will be specifically described below with reference to embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of the invention and does not strictly limit the scope of protection specifically claimed by the invention.

[0022] Example 1: like Figures 1-14 As shown, a multi-station fork welding device is disclosed. The entire device is controlled by a controller and includes a body 1. A welding station is provided on the front of the body 1. A first cylinder 2 is installed on the top of the body 1 by a bolt and nut kit. An electrode welding head 3 and a positioning mold assembly 4 are provided on the welding station. The positioning mold assembly 4 is externally spaced from a limiting fork 5, a push handle mechanism 6, a second cylinder 7, a fork clamping mechanism 8, and a fork tail clamping mechanism 9. During installation, the electrode welding head 3 includes a positive electrode and a negative electrode. The negative electrode is fixed to the welding station by screws, and the positive electrode is installed on the cylinder rod of the first cylinder 2 by a bolt and nut kit. During operation, the operator controls the first cylinder 2 to lift the upper electrode, symmetrically merges the two workpieces, and places them in the space between the positive and negative electrodes. At the same time, the second cylinder 7 is activated. The fork clamping mechanism 8 provides support for the workpiece fork under the pushing action of the second cylinder 7, thereby reducing the plastic skew of the workpiece fork. The fork tail clamping mechanism 9 provides support for the workpiece fork tail under the pushing action of the second cylinder 7. Then, the pusher handle mechanism 6 is operated to push the workpiece laterally along the electrode welding head 3, so that the welding area of ​​the workpiece is aligned with the electrode welding head 3 in the welding relief groove 404, thus completing the loading. During welding, the first cylinder 2 lowers the upper electrode until the upper and lower electrodes clamp the workpiece, and the upper and lower electrodes are connected to the power supply. The huge resistance heat and contact resistance heat generated when the current passes through the workpiece itself are used to melt and connect the metal in the welding area under pressure. Since the positioning mold assembly 4 has three stations to provide clamping force for the fork, welding area and fork tail of the workpiece, the degree of plastic distortion of the fork can be reduced and the problem of the finished fork size exceeding the tolerance range can be solved. The second cylinder 7 is far away from the welding area and can continuously provide clamping force.

[0023] See attached document Figure 3 , Figure 4 and Figure 6 The positioning mold base assembly 4 includes a support column 401 installed at the welding station, a mold support 402, a welding clearance groove 404 opened on the outside of the mold support 402, a fork support member 403 and a fork tail positioning member 405 fixed at intervals on the mold support 402. During installation, the fork support member 403 and the fork tail positioning member 405 are installed on the mold support 402 by bolt and nut kits, and the support column 401 and the mold support 402 are vertically installed at the welding station by bolt and nut kits. When loading, the workers place the workpiece horizontally against the mold support 402 until the welding area of ​​the workpiece reaches the welding relief groove 404, with the fork end against the fork end support 403 and the fork end against the fork end positioning part 405 to complete the horizontal positioning. The fork end clamping mechanism 8 and the fork end clamping mechanism 9 are used to clamp the fork end and the fork end respectively. Then, the staff operates the pusher handle mechanism 6 to push the workpiece laterally along the electrode welding head 3 and clamp it on the mold support 402 and the fork tail positioning part 405, so that the welding area of ​​the workpiece is aligned with the electrode welding head 3 in the welding relief groove 404, and the loading is completed.

[0024] As an optional embodiment, a nut is welded to the bottom of the welding relief groove 404, and a limiting bolt 406 is inserted into the vertical thread of the nut along the mold support 402. During loading, the limiting bolt 406 is used to vertically support the lower surface of the workpiece fork tail.

[0025] See attached document Figure 6 , Figure 7 and Figure 8The positioning mold base assembly 4 is welded with a hinge base 407 for the hinged fork clamping mechanism 8; Among them, the two fork clamping mechanisms 8 form a group, which are used to vertically straighten the fork clamping mechanism 8 along the positioning mold base assembly 4.

[0026] Specifically, the mold holder 402 is near the welding area, and its top is provided with a first heat dissipation hole 408, which can accelerate heat dissipation through the air flowing inside the first heat dissipation hole 408. Meanwhile, the mold holder 402 has a hollow interior for the circulation of cooling water. The cooling water circulates through a connector and a cooling water pipe 409, and exchanges heat with an external cooling water source. The external cooling water source can be cooled by a fan to provide a continuous and reliable heat dissipation effect.

[0027] See attached document Figure 5 , Figure 6 and Figure 7 The push handle mechanism 6 includes a push handle 601, a hinge 602 and a movable arm 603 that are sequentially hinged along the transverse side of the positioning mold base assembly 4. During installation, the push handle 601 and the movable arm 603 are installed on one side of the positioning mold base assembly 4 via flanges and hinge shafts, and the push handle 601 and the movable arm 603 are connected to each other via the hinge 602. In addition, a first pressure plate 605 and a second pressure plate 607 are detachably installed on the movable arm 603. After the material is loaded, the worker pushes the push handle 601 forward by hand, transmitting power to the movable arm 603 along the hinge 602. This causes the first pressure plate 605 and the second pressure plate 607 to press against the workpiece under the pushing force of the movable arm 603, and to avoid the electrode welding head 3 from both sides. This can prevent the risk of burns caused by the hand approaching the welding area.

[0028] See attached document Figure 5 , Figure 6 and Figure 7 A first bolt connector 604 connects the movable arm 603 and the first pressure plate 605, and a second bolt connector 606 connects the first pressure plate 605 and the second pressure plate 607. When the first pressure plate 605 or the second pressure plate 607 is worn, in order to prevent the workpiece from being pressed more firmly, the nut of the first bolt connector 604 or the second bolt connector 606 is unscrewed to release the locking state of the first pressure plate 605 and the second pressure plate 607 for quick replacement.

[0029] As an optional embodiment, the first pressure plate 605 and the second pressure plate 607 can be locked to the movable arm 603 by means of a pin. During maintenance, the pin can be pulled out to quickly release the locking state, and the first pressure plate 605 and the second pressure plate 607 can be replaced or maintained.

[0030] See attached document Figure 4 , Figure 5 and Figure 8The fork clamping mechanism 8 includes a first support plate 801 and a third pressure plate 803 spaced apart outside the positioning mold base assembly 4. A first adjusting bolt 805 is threaded through the third pressure plate 803. During installation, the first support plate 801 is installed on the bottom of the mold base 402 by bolt and nut kit, and the third pressure plate 803 is hinged to the top of the mold base 402 by hinge seat 407. The first support plate 801 and the third pressure plate 803 are respectively connected to the bottom of the second cylinder 7 and the cylinder rod by hinge shaft. During feeding, the third pressure plate 803 swings forward around the hinge seat 407 under the push of the second cylinder 7, driving the first adjusting bolt 805 to vertically press the workpiece fork. It and the first support plate 801 provide support force for the workpiece fork in different directions, and work together with the positioning mold base assembly 4 to continuously limit the position, so as to reduce the plastic distortion of the workpiece fork during welding. At the same time, the operator can rotate the first adjusting bolt 805 clockwise to increase the length of the first adjusting bolt 805 extending out of the third pressure plate 803, or rotate the first adjusting bolt 805 counterclockwise to decrease the length of the first adjusting bolt 805 extending out of the third pressure plate 803. This extension length is used to adjust the width of the workpiece clamping fork between the first support plate 801 and the third pressure plate 803.

[0031] See attached document Figure 8 , Figure 9 and Figure 10 The first pallet 801 has an inclined slope of less than 15° at its end, and anti-slip teeth 802 are provided on the slope. The end of the third pressure plate 803 extends in a raised shape toward the anti-slip teeth 802, and heat insulation grooves 804 are provided on the raised shape. When loading, the worker presses the lower edge of the workpiece fork against the anti-slip teeth 802, so that the slope fits the arc surface of the workpiece fork, and the anti-slip teeth 802 avoids the pivot on the workpiece. The anti-slip teeth 802, together with the raised shape of the third pressure plate 803, clamps the workpiece fork at multiple angles to prevent the workpiece fork from loosening during welding.

[0032] See attached document Figure 4 , Figure 8 and Figure 9 The fork-tail clamping mechanism 9 includes a second support plate 901 and a fourth pressure plate 903 spaced apart outside the positioning mold base assembly 4. During installation, the second support plate 901 is installed on the back of the positioning mold base assembly 4 by mounting blocks and bolt and nut kits. The middle of the fourth pressure plate 903 is hinged to the top of the mold base 402 by a hinge seat 407, and the end of the fourth pressure plate 903 is threaded with a second adjusting bolt 904. During feeding, the fourth pressure plate 903 swings in the positive direction around the hinge seat 407 under the push of the second cylinder 7, which drives the second adjusting bolt 904 to vertically press the workpiece fork tail. It provides support for the workpiece tail vertically along the welding relief groove 404 to prevent the workpiece fork tail from loosening during welding. At the same time, the operator can rotate the second adjusting bolt 904 clockwise to increase the length of the second adjusting bolt 904 extending out of the fourth pressure plate 903, or rotate the second adjusting bolt 904 counterclockwise to decrease the length of the second adjusting bolt 904 extending out of the fourth pressure plate 903. This extension length is used to adjust the height limit of the fourth pressure plate 903 clamping the tail of the workpiece.

[0033] See attached document Figure 8 , Figure 9 and Figure 12 The fourth pressure plate 903 is hinged to the positioning mold base assembly 4 in the middle. The hinge point between the fourth pressure plate 903 and the positioning mold base assembly 4 is used as the fulcrum to support the tail of the workpiece under the pushing action of the second cylinder 7. It is a spindle shape with a thick middle and flat ends, which can increase the structural strength at the fulcrum, prevent cracking or deformation, and ensure the reliability of workpiece clamping.

[0034] See attached document Figure 4 , Figure 8 and Figure 9 Since the second support plate 901 and the fourth pressure plate 903 are in close contact with the workpiece, their temperatures will rise during welding. To prevent the temperature rise from damaging the second cylinder 7, the second support plate 901 and the fourth pressure plate 903 are respectively provided with a second heat dissipation hole 902 and a third heat dissipation hole 905. The second heat dissipation hole 902 and the third heat dissipation hole 905 are used to dissipate heat through heat exchange with the air during workpiece welding, thereby reducing the heat transferred from the second support plate 901 and the fourth pressure plate 903 to the second cylinder 7, so as to avoid problems such as air leakage, sluggish operation, or even a sudden drop in clamping force of the second cylinder 7.

[0035] For details, see Figure 14 The different pins of the controller are electrically connected to the temperature sensor, the first cylinder 2, the electrode welding head 3, the cooling water pipe 409, and the second cylinder 7, respectively. The temperature sensor serves as the detection unit to monitor the return water temperature of the cooling water. The first cylinder 2, the electrode welding head 3, the cooling water pipe 409, and the second cylinder 7 serve as the execution units. The detection unit and the execution unit are electrically connected to the controller through wires, printed circuits, or communication buses, respectively.

[0036] Example 2: like Figure 15 As shown, a multi-station shift fork welding method, using the multi-station shift fork welding device provided in Embodiment 1, includes the following steps: Material preparation: The first cylinder 2 lifts the upper electrode and places the workpiece in the space between the positive and negative electrodes; Workpiece positioning: The second cylinder 7 is activated. The fork clamping mechanism 8 provides support for the workpiece fork under the push of the second cylinder 7, thereby reducing the plastic skew of the workpiece fork. The fork tail clamping mechanism 9 provides support for the workpiece fork tail under the push of the second cylinder 7. At the same time, the operator rotates the pusher handle mechanism 6 to push the workpiece laterally along the electrode welding head 3, so that the welding area of ​​the workpiece is aligned with the electrode welding head 3 in the welding relief groove 404, thus completing the loading. Workpiece clamping: The first cylinder 2 lowers the upper electrode until the upper and lower electrodes clamp the workpiece; Welding: The upper and lower electrodes are connected to the power supply. The huge resistance heat and contact resistance heat generated when the current passes through the workpiece itself are used to melt and join the metal in the welding area under pressure to obtain the welded part. Unloading: The operator reverses the pusher handle mechanism 6 to control the first cylinder 2 to open the gap between the upper and lower electrodes, and the second cylinder 7 drives the fork clamping mechanism 8 and the fork tail clamping mechanism 9 to release the welded parts, which can be manually removed.

[0037] The above description is merely an optional embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A multi-station shift fork welding device, comprising a body (1) and an electrode welding head (3) disposed on the body (1), characterized in that, Also includes: The positioning mold base assembly (4) is located outside the electrode welding head (3). The positioning mold base assembly (4) includes a mold support (402), a welding clearance groove (404) opened on the outside of the mold support (402), a fork support member (403) and a fork tail positioning member (405) fixed at intervals on the mold support (402). The push handle mechanism (6) and the fork clamping mechanism (8) are spaced apart outside the positioning mold base assembly (4); The second cylinder (7) is located inside the body (1); The fork clamping mechanism (8) is used to provide support force for the workpiece fork under the pushing action of the second cylinder (7), thereby reducing the plastic skew of the workpiece fork. The pusher handle mechanism (6) is used to push the workpiece along the transverse direction of the electrode welding head (3) and clamp it on the mold support (402) and the fork tail positioning part (405), so that the welding area of ​​the workpiece is aligned with the electrode welding head (3) in the welding relief groove (404).

2. The multi-station shift fork welding device according to claim 1, characterized in that: The fork clamping mechanism (8) includes a first support plate (801) and a third pressure plate (803) spaced apart outside the positioning mold base assembly (4), and a first adjusting bolt (805) is threaded through the third pressure plate (803). The third pressure plate (803) is used to provide support force for the workpiece fork in different directions with the first support plate (801) under the pushing action of the second cylinder (7). The first adjusting bolt (805) extends out of the length of the third pressure plate (803) to adjust the width of the workpiece fork clamped by the first support plate (801) and the third pressure plate (803).

3. The multi-station shift fork welding device according to claim 2, characterized in that: The first pallet (801) has an end with an inclination of less than 15° and anti-slip serrations (802) are provided on the inclination. The end of the third pressure plate (803) extends in a raised shape toward the anti-slip serrations (802) and a heat insulation groove (804) is provided on the raised shape. The anti-slip teeth (802) are used to avoid designated points of the workpiece and, together with the protrusions of the third pressure plate (803), clamp the workpiece fork at multiple angles.

4. The multi-station shift fork welding device according to claim 1, characterized in that: It also includes a fork tail clamping mechanism (9), which includes a second support plate (901) and a fourth pressure plate (903) spaced apart outside the positioning mold base assembly (4), and a second adjusting bolt (904) threaded through the end of the fourth pressure plate (903). The fourth pressure plate (903) is used to provide support for the tail of the workpiece vertically along the welding relief groove (404) under the pushing action of the second cylinder (7). The second adjusting bolt (904) extends out of the length of the fourth pressure plate (903) to adjust the height limit of the fourth pressure plate (903) clamping the tail of the workpiece.

5. A multi-station shift fork welding device according to claim 4, characterized in that: The thickness of the fourth pressure plate (903) in the middle is greater than the thickness of its two ends. The middle part is hinged to the positioning mold base assembly (4). The hinge point between the fourth pressure plate (903) and the positioning mold base assembly (4) is used as the fulcrum to support the tail of the workpiece under the pushing action of the second cylinder (7).

6. The multi-station shift fork welding device according to claim 4, characterized in that: The second support plate (901) and the fourth pressure plate (903) are respectively provided with a second heat dissipation hole (902) and a third heat dissipation hole (905). The second heat dissipation hole (902) and the third heat dissipation hole (905) are used to dissipate heat through heat exchange with air during workpiece welding, thereby reducing the heat transferred from the second support plate (901) and the fourth pressure plate (903) to the second cylinder (7).

7. The multi-station shift fork welding device according to claim 1, characterized in that: The push handle mechanism (6) includes a push handle (601), a hinge (602) and a movable arm (603) that are sequentially hinged along the positioning mold base assembly (4) in the transverse direction. A first pressure plate (605) and a second pressure plate (607) are detachably mounted on the movable arm (603). The first pressure plate (605) and the second pressure plate (607) are used to press against the workpiece under the thrust of the movable arm (603) and to avoid the electrode welding head (3) from both sides.

8. A multi-station shift fork welding device according to claim 7, characterized in that: A first bolt connector (604) is connected between the movable arm (603) and the first pressure plate (605), and a second bolt connector (606) is connected between the first pressure plate (605) and the second pressure plate (607). The first bolt connector (604) and the second bolt connector (606) are used to replace the first pressure plate (605) and the second pressure plate (607).

9. A multi-station shift fork welding device according to claim 1, characterized in that: The positioning mold base assembly (4) is welded with a hinge base (407) for the hinged fork clamping mechanism (8). Among them, the two fork clamping mechanisms (8) are a group, used to vertically straighten the fork clamping mechanism (8) along the positioning mold base assembly (4).

10. A multi-station shift fork welding method, using the multi-station shift fork welding device as described in any one of claims 1-9, characterized in that, Includes the following steps: Material preparation: Raise the upper electrode and place the workpiece in the gap between the positive and negative electrodes; Workpiece positioning: Start the second cylinder (7), and the fork clamping mechanism (8) is used to provide support force for the workpiece fork and support force for the workpiece fork tail under the pushing action of the second cylinder (7). At the same time, the worker rotates the pusher handle mechanism (6) to push the workpiece laterally along the electrode welding head (3) so that the welding area of ​​the workpiece is aligned with the electrode welding head (3) in the welding area, and the loading is completed. Workpiece clamping: Lower the upper electrode until the upper and lower electrodes clamp the workpiece; Welding: The upper and lower electrodes are connected to the power supply. The huge resistance heat and contact resistance heat generated when the current passes through the workpiece itself are used to melt and join the metal in the welding area under pressure to obtain the welded part. Unloading: The worker reverses the pusher handle mechanism (6) to open the gap between the upper and lower electrodes, and the second cylinder (7) drives the fork clamping mechanism (8) to release the welded parts, which can be manually removed.

Images