Adjustable clamping position jaw and cold header

Abstract

This invention discloses an adjustable clamping gripper, comprising a mounting base and several clamping components disposed on the mounting base. Each clamping component includes a pull rod, a first swing arm, a second swing arm, a first swing rod, a second swing rod, a first gripper, and a second gripper. The pull rod is disposed on the mounting base. A first connecting rod is hinged between the first swing arm and the pull rod. One end of the first swing rod is hinged to the mounting base, and the other end is hinged to the first swing arm. A second connecting rod is hinged between the second swing arm and the pull rod. One end of the second swing rod is hinged to the mounting base, and the other end is hinged to the second swing arm. The first gripper is slidably disposed on the first swing arm, and the second gripper is disposed on the second swing arm. An eccentric rod is disposed between the first and second swing arms. The adjustable clamping gripper provided by this invention improves the working efficiency of a cold heading machine by shortening the waiting time of the moving mold and enables fine-tuning of the gripper's clamping position. This invention also discloses a cold heading machine with an adjustable clamping gripper.

Description

Technical Field

[0001] This invention relates to the field of cold heading machine equipment technology, and particularly to an adjustable clamping gripper and a cold heading machine. Background Technology

[0002] A cold heading machine is a stamping processing equipment used in mechanical manufacturing to stamp materials into the desired shape without altering them. During production, the cold heading machine uses grippers to hold the material (bar stock or wire) into the die position, and then uses the moving die and the die to stamp the material into shape.

[0003] Existing cold heading machine clamping assemblies clamp and release materials by changing the angle between two jaws. Because the projection of the moving die on the vertical plane overlaps with the projection of the jaws on the vertical plane, the clamping assembly is driven to the previous station to clamp the material after the moving die completes one stamping action, and then driven to the next station. Only after the jaws release the material can the moving die enter the next stamping action. This process results in a long waiting time for the moving die, leading to low efficiency of the cold heading machine. Furthermore, existing clamping assemblies require adjusting their installation position to adjust the clamping position of the jaws, which is cumbersome.

[0004] It is evident that existing technologies still need improvement and enhancement. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a gripper with an adjustable clamping position and a cold heading machine, which aims to improve the working efficiency of the cold heading machine by shortening the waiting time of the moving mold, and to achieve fine adjustment of the clamping position of the gripper.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An adjustable clamping gripper includes a mounting base and several clamping components arranged side-by-side on the mounting base. Each clamping component includes a pull rod, a first swing arm, a second swing arm, a first swing rod, a second swing rod, a first gripper, and a second gripper. The pull rod is vertically slidable on the mounting base. The first swing arm has a first upper hinge position and a first middle hinge position. The second swing arm has a second upper hinge position and a second middle hinge position. A first connecting rod is hinged between the first upper hinge position and the lower end of the pull rod. One end of the second rocker arm is hinged to the mounting base, and the other end is hinged to the first upper hinge position; a second connecting rod is hinged between the second upper hinge position and the lower end of the pull rod; one end of the second rocker arm is hinged to the mounting base, and the other end is hinged to the second upper hinge position; the first gripper is slidably mounted on the first rocker arm, and the second gripper is mounted on the second rocker arm, and the first gripper and the second gripper cooperate to clamp the material; an eccentric rod is provided between the first middle hinge position and the second middle hinge position, and the eccentric rod is used to adjust the clamping position of the first gripper and the second gripper.

[0008] Furthermore, the lower end of the pull rod is provided with a hinge seat, and both the first connecting rod and the second connecting rod are hinged to the hinge seat. A spring is sleeved on the pull rod, and the spring is located between the inner top of the mounting base and the hinge seat.

[0009] Furthermore, the eccentric rod includes a first shaft portion and a second shaft portion. The center lines of the first shaft portion and the second shaft portion are not on the same straight line. The first shaft portion is rotatably connected to the second middle hinge position, and the second shaft portion is connected to the rotating shaft of the first middle hinge position. An adjustment groove is opened at the end of the first shaft portion.

[0010] Furthermore, the first swing arm is provided with a first clearance position at the first middle hinge position; the second swing arm is provided with a second clearance position at the second middle hinge position.

[0011] Furthermore, the first swing arm has a sliding groove for sliding connection with the first gripper, and the sliding groove and the first clearance position are respectively located on the corresponding sides of the first swing arm. The first swing arm has a waist hole communicating with the sliding groove. The second swing arm has a mounting groove for mounting the second gripper, and the mounting groove and the second clearance position are respectively located on the corresponding sides of the second swing arm.

[0012] Furthermore, the first gripper has a gripping groove, and the second gripper has a gripping surface, with the gripping groove and gripping surface working together to grip the material.

[0013] Furthermore, the mounting base has a gate-shaped cross-section, and the clamping assembly is located inside the mounting base. The mounting base is provided with fixed shafts that are respectively hinged to the first swing arm and the second swing arm, and the second connecting rod on one clamping assembly shares a fixed shaft with the first connecting rod on the adjacent clamping assembly.

[0014] Furthermore, the mounting base has a notch to facilitate the adjustment of the eccentric rod and the mounting position of the first gripper.

[0015] A cold heading machine, characterized in that it includes a clamping platform and adjustable clamping jaws, the adjustable clamping jaws being disposed on the clamping platform.

[0016] Beneficial effects:

[0017] The adjustable clamping jaws provided by this invention drive the first and second connecting rods to move up and down via a sliding pull rod. The first upper hinge of the first swing arm is hinged to the first connecting rod and the first swing rod, while the first middle hinge is rotatably connected to the eccentric rod. The second upper hinge of the second swing arm is hinged to the second connecting rod and the second swing rod, while the second middle hinge is rotatably connected to the eccentric rod. When the pull rod moves downward, the first and second swing arms swing downward around the eccentric rod, and the first and second clamping jaws move closer together to clamp the material. Conversely, during the entire upward movement of the pull rod, the first and second swing arms move upward, releasing the material and moving above their original clamping positions. This ensures that the projections of the first and second clamping jaws on the vertical plane do not overlap with the projection of the moving die of the cold heading machine on the vertical plane. The clamping assembly can move to the previous position in advance during the stamping process of the moving die, effectively shortening the waiting time for the moving die to enter the next stamping action and improving the working efficiency of the cold heading machine. Furthermore, while the material is being clamped, the position of the first and second grippers can be changed by rotating the eccentric rod, and the mounting position of the first gripper on the first swing arm can be adjusted to achieve fine-tuning of the clamping position.

[0018] The cold heading machine provided by the present invention, by setting up a clamping platform, drives multiple clamping components to move to the previous station to wait before the moving die performs the next stamping action, thereby shortening the waiting time of the moving die and improving the working efficiency of the cold heading machine. Attached Figure Description

[0019] Figure 1 This is a structural diagram of the adjustable clamping jaws provided by the present invention.

[0020] Figure 2 This is a structural diagram of the clamping assembly in the adjustable clamping position gripper provided by the present invention.

[0021] Figure 3 An exploded view of the clamping component in the adjustable clamping position gripper provided by the present invention.

[0022] Figure 4 An exploded view of the clamping component in the adjustable clamping position gripper provided by the present invention.

[0023] Figure 5 The rear view of the eccentric rod in the adjustable clamping position jaw provided by the present invention.

[0024] Figure 6 This is a front view of the clamping assembly in the adjustable clamping position gripper provided by the present invention when clamping materials.

[0025] Figure 7The front view of the first and second jaws of the adjustable clamping position clamping assembly provided by the present invention when their opening range is at its maximum.

[0026] Figure 8 The front view of the clamping assembly in the adjustable clamping position gripper provided by the present invention after releasing the material.

[0027] Figure 9 This is a schematic diagram illustrating the adjustment principle of the eccentric rod in the adjustable clamping position gripper provided by the present invention.

[0028] Figure 10 A comparison diagram of the clamping component in the adjustable clamping position gripper provided by the present invention in the states of clamping and releasing materials.

[0029] Explanation of main component symbols: Clamping assembly 100, pull rod 1, hinge seat 11, spring 12, first swing arm 2, first upper hinge position 21, first pin 211, first middle hinge position 22, first clearance position 23, slide groove 24, waist hole 25, first receiving groove 26, second swing arm 3, second upper hinge position 31, second pin 311, second middle hinge position 32, second clearance position 33, mounting groove 34, second receiving groove 35, first swing rod 4, second swing rod 5, first gripper 6, clamping groove 61, break hole 62, second gripper 7, clamping surface 71, first connecting rod 8, second connecting rod 9, eccentric rod 10, first shaft part 101, second shaft part 102, adjusting groove 103, mounting seat 200, fixed shaft 201, notch 202. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figure 1-10This invention provides an adjustable clamping jaw and a cold heading machine, including a mounting base 200 and several clamping assemblies 100 arranged side by side on the mounting base 200. Each clamping assembly 100 includes a pull rod 1, a first swing arm 2, a second swing arm 3, a first swing rod 4, a second swing rod 5, a first clamping jaw 6, and a second clamping jaw 7. The pull rod 1 is vertically slidably mounted on the mounting base 200. The first swing arm 2 has a first upper hinge position 21 and a first middle hinge position 22. The second swing arm 3 has a second upper hinge position 31 and a second middle hinge position 32. A first upper hinge position 21 and the lower end of the pull rod 1 are hinged together. The connecting rod 8 has one end of the first swing rod 4 hinged to the mounting base 200 and the other end hinged to the first upper hinge position 21; the second upper hinge position 31 and the lower end of the pull rod 1 are hinged to the second connecting rod 9; one end of the second swing rod 5 is hinged to the mounting base 200 and the other end hinged to the second upper hinge position 31; the first gripper 6 is slidably disposed on the first swing arm 2 and the second gripper 7 is disposed on the second swing arm 3, and the first gripper 6 and the second gripper 7 cooperate to clamp the material; an eccentric rod 10 is provided between the first middle hinge position 22 and the second middle hinge position 32, and the eccentric rod 10 is used to adjust the clamping position of the first gripper 6 and the second gripper 7.

[0032] When clamping materials, such as Figure 6 As shown, the pull rod 1 is driven to move downwards, causing the first connecting rod 8 and the second connecting rod 9 to move downwards accordingly, increasing the angle between them. This, in turn, drives the first swing arm 2 to swing downwards around the rotation center of the first central hinge position 22 and the eccentric rod 10, and the second swing arm 3 to swing downwards around the rotation center of the second central hinge position 32 and the eccentric rod 10, thus enabling the first gripper 6 and the second gripper 7 to clamp the material. In the clamping state, rotating the eccentric rod 10 changes the position of the first gripper 6 and the second gripper 7, and in conjunction with adjusting the mounting position of the first gripper 6 on the first swing arm 2, fine-tuning the clamping position of the first gripper 6 and the second gripper 7 is achieved, aligning the material with the mold.

[0033] When the material is released, the pull rod 1 is driven to move upward, the first connecting rod 8 and the second connecting rod 9 move upward accordingly and the angle between them decreases, the first swing rod 4 and the second swing rod 5 swing upward, the first swing arm 2 and the second swing arm 3 swing upward respectively, at this time the first gripper 6 and the second gripper 7 release the material; Figure 7 As shown, when the first upper hinge position 21 and the second upper hinge position 31 move to the plane where the first swing rod 4 and the mounting base 200 are hinged, the included angle between the first connecting rod 8 and the second connecting rod 9 is at its minimum, and the first gripper 6 and the second gripper 7 open to their maximum range.

[0034] As lever 1 continues to move upward, as Figure 8As shown, the angle between the first connecting rod 8 and the second connecting rod 9 increases, the first swing rod 4 and the second swing rod 5 continue to swing upward, and the first swing arm 2 and the second swing arm 3 swing downward respectively. At this time, the angle between the first gripper 6 and the second gripper 7 gradually decreases. Compared with the state when the first gripper 6 and the second gripper 7 are holding the material, they move upward by a distance, so that after the gripping assembly 100 releases the material, the projection plane of the first gripper 6 and the second gripper 7 on the vertical plane does not overlap with the projection plane of the moving mold of the cold heading machine on the vertical plane; as Figure 10 As shown, after the first gripper 6 and the second gripper 7 release the material, they move upward a distance of m, that is, to above the mold a. Therefore, during the moving mold stamping process, the first gripper 6 and the second gripper 7 can be moved horizontally to the designated position under the drive of the cold heading machine's clamping table to wait. After the moving mold stamping is completed, the pull rod 1 moves downward to allow the first gripper 6 and the second gripper 7 to clamp the material and perform the next material conveying action, effectively shortening the waiting time when the moving mold enters the next stamping and improving the working efficiency of the cold heading machine. In addition, the first gripper 6 and the second gripper 7 clamp the material in a timely manner to prevent the material from flying out after the stamping is completed.

[0035] It is important to understand that the cold heading machine has multiple processing positions. Therefore, the mounting base 200 is equipped with multiple clamping components 100 to simultaneously transport materials from each processing position to the next position. The specific number of clamping components 100 should be determined based on the number of processing positions of the cold heading machine.

[0036] In a preferred embodiment, see [reference] Figure 2 , 6 The lower end of the pull rod 1 is provided with a hinge seat 11. The first connecting rod 8 and the second connecting rod 9 are both hinged to the hinge seat 11. A spring 12 is sleeved on the pull rod 1, and the spring 12 is located between the inner top of the mounting base 200 and the hinge seat 11. The upper end of the spring 12 abuts against the inner top of the mounting base 200, and its lower end abuts against the hinge seat 11. When the pull rod 1 is driven to move upward, the spring 12 is in a compressed state; when the upward pulling force of the pull rod 1 disappears, the spring 12 stretches due to its own elasticity, driving the pull rod 1 to move downward, thereby causing the first gripper 6 and the second gripper 7 to come closer to each other and clamp the material. Under the elastic force of the spring 12, the stability of clamping the material is ensured.

[0037] In a preferred embodiment, see [reference] Figure 3 , 5 The eccentric rod 10 includes a first shaft portion 101 and a second shaft portion 102. The center lines of the first shaft portion 101 and the second shaft portion 102 are not on the same straight line. The first shaft portion 101 is rotatably connected to the second middle hinge position 32, and the second shaft portion 102 is pivotally connected to the first middle hinge position 22. An adjustment groove 103 is provided at the end of the first shaft portion 101. Figure 9As shown, rotating the eccentric rod 10 by an angle causes the material to translate a distance e. By rotating the eccentric rod 10, the positions of the rotation centers of the first hinge position 22 and the second hinge position 32 are changed, allowing for fine-tuning of the positions of the first swing arm 2 and the second swing arm 3. Consequently, the positions of the first gripper 6 and the second gripper 7 change, aligning the material held by the first gripper 6 and the second gripper 7 with the mold. When the deviation between the material and the mold position becomes significant, the clamping positions of the first gripper 6 and the second gripper 7 can be further adjusted by adjusting the mounting position of the first gripper 6 on the first swing arm 2.

[0038] Optionally, the adjustment groove 103 can be an internal hexagonal groove, a cross-shaped groove, or a slotted groove, and different groove shapes can be adjusted using different tools.

[0039] It is important to understand that because the pull rod 1 maintains a downward tendency under the elastic force of the spring 12, the first gripper 6 and the second gripper 7 can stably clamp the material during the adjustment of the clamping position. Figure 9 This is merely a comparison diagram of the adjusted positions. Because the adjustment of the eccentric rod involves the coordination of multiple linkage movements, therefore... Figure 9 This is for reference only, to help understand the working principle of fine-tuning. The specific adjustment process should be determined according to the actual situation.

[0040] In a preferred embodiment, see [reference] Figure 3 , 4 The first swing arm 2 is provided with a first clearance position 23 at the first intermediate hinge position 22; the second swing arm 3 is provided with a second clearance position 33 at the second intermediate hinge position 32. During assembly, the first intermediate hinge position 22 is located on the second clearance position 33, and the second intermediate hinge position 32 is located on the first clearance position 23, so that the first swing arm 2 and the second swing arm 3 can be installed on the same vertical plane, improving the compactness of the clamping assembly 100 structure.

[0041] Specifically, the first upper hinge position 21 has a first receiving groove 26, and the lower ends of the first connecting rod 8 and the first swing arm 2 are both located in the first receiving groove 26 and are hinged to the first upper hinge position 21 by the first pin 211; the second upper hinge position 31 has a second receiving groove 35, and the lower ends of the second connecting rod 9 and the second swing arm 3 are both located in the second receiving groove 35 and are hinged to the second upper hinge position 31 by the second pin 311; through the above arrangement, the compactness of the clamping assembly 100 structure is further improved.

[0042] Further, see Figure 3 , 4The first swing arm 2 has a sliding groove 24 for sliding connection with the first gripper 6, and the sliding groove 24 and the first clearance position 23 are respectively located on the corresponding sides of the first swing arm 2. The first swing arm 2 has a waist hole 25 communicating with the sliding groove 24. The first gripper 6 is mounted on the waist hole 25 by screws. Adjusting the installation position of the screws on the waist hole 25 can adjust the installation position of the first gripper 6. The second swing arm 3 has a mounting groove 34 for mounting the second gripper 7, and the mounting groove 34 and the second clearance position 33 are respectively located on the corresponding sides of the second swing arm 3. With the above configuration, while ensuring the structural strength of the first swing arm 2 and the second swing arm 3, the first gripper 6 and the second gripper 7 can be mounted on the same vertical plane and can stably clamp materials.

[0043] In a preferred embodiment, see [reference] Figure 6 The first gripper 6 has a gripping groove 61, and the second gripper 7 has a gripping surface 71. The gripping groove 61 and the gripping surface 71 cooperate to grip the material. Under the action of the spring 12 driving the pull rod 1 to move downward, the gripping surface 71 always presses the material against the gripping groove 61, realizing the gripping of the material by the first gripper 6 and the second gripper 7. In addition, by changing the size of the first gripper 6 with different gripping grooves 61, it can be used to grip materials of different diameters, making it widely applicable.

[0044] Specifically, the first gripper 6 and the second gripper 7 are respectively provided with break holes 62. When the moving mold of the cold heading machine collides with the first gripper 6 and the second gripper 7, the first gripper 6 and the second gripper 7 will break along the position of the break holes 62, so as to avoid deformation of components such as the first swing arm 2 and the second swing arm 3 due to the collision, thereby protecting the clamping assembly 100.

[0045] In a preferred embodiment, see [reference] Figure 2 The mounting base 200 has a portal frame structure in cross-section. The clamping assembly 100 is housed within the mounting base 200. The mounting base 200 contains fixed shafts 201 that are respectively hinged to the first swing arm 4 and the second swing arm 5. Furthermore, the second connecting rod 9 on one clamping assembly 100 shares a fixed shaft 201 with the first connecting rod 8 on its adjacent clamping assembly 100. This configuration improves the compactness of the clamping assemblies 100, making them suitable for use on cold heading machines with limited installation space.

[0046] Specifically, the mounting base 20 is provided with a sliding sleeve, and the pull rod 1 is slidably connected to the sliding sleeve. Under the guidance of the sliding sleeve, the pull rod 1 makes a vertical lifting and lowering movement.

[0047] Further, see Figure 1 The mounting base 200 has a notch 202 to facilitate the adjustment of the mounting positions of the eccentric rod 10 and the first clamp 6, which improves the convenience of adjusting the clamping positions of the first clamp 6 and the second clamp 7.

[0048] A cold heading machine includes a clamping platform and adjustable clamping jaws, the adjustable clamping jaws being disposed on the clamping platform. The clamping platform and the cold heading machine are not shown in the accompanying drawings. The clamping platform is used to drive the pull rods 1 of each clamping assembly 100 to perform lifting and lowering movements, and to drive each clamping assembly 100 to perform reciprocating translational movements, thereby transferring material from the previous station to the next station. Before the moving die of the cold heading machine completes a single stamping, the clamping table drives each clamping component 100 to move to the upper position to wait. After the moving die completes a single stamping, the clamping table drives the pull rod 1 of each clamping component 100 to move downward, so that the first jaw 6 and the second jaw 7 clamp the material at that position. Then the clamping table drives each clamping component 100 to move horizontally to the next position, the pull rod 1 moves upward, the first jaw 6 and the second jaw 7 release the material, and the first jaw 6 and the second jaw 7 move upward a certain distance so that the projection of the first jaw 6 and the second jaw 7 on the vertical plane does not overlap with the projection of the moving die on the vertical plane, and the moving die can perform the next stamping operation. It can be seen that the waiting time between two adjacent stamping actions of the moving die is the sum of the time that the adjustable clamping jaws hold the material and the time that the adjustable clamping jaws move from the previous station to the next station. Compared with the existing technology, the waiting time of the moving die during the process of the adjustable clamping jaws moving from the previous station to the next station is reduced, thereby improving the working efficiency of the cold heading machine.

[0049] It is understood that those skilled in the art can make equivalent substitutions or changes to the technical solution and inventive concept of the present invention, and all such changes or substitutions should fall within the protection scope of the present invention.

Claims

1. A gripper with an adjustable clamping position, characterized in that, The device includes a mounting base and several clamping assemblies arranged side-by-side on the mounting base. Each clamping assembly includes a pull rod, a first swing arm, a second swing arm, a first swing rod, a second swing rod, a first gripper, and a second gripper. The pull rod is vertically slidably mounted on the mounting base. The first swing arm has a first upper hinge position and a first middle hinge position. The second swing arm has a second upper hinge position and a second middle hinge position. A first connecting rod is hinged between the first upper hinge position and the lower end of the pull rod. One end of the first swing rod is hinged to the mounting base, and the other end is hinged to the first upper hinge position. A second connecting rod is hinged between the second upper hinge position and the lower end of the pull rod. One end of the second swing rod is hinged to the mounting base, and the other end is hinged to the second upper hinge position. The first gripper is slidably mounted on the first swing arm, and the second gripper is mounted on the second swing arm. The first and second grippers cooperate to clamp materials. An eccentric rod is provided between the first and second middle hinge positions to adjust the clamping positions of the first and second grippers. When the pull rod moves downward, the first swing arm and the second swing arm swing downward around the eccentric rod respectively, and the first gripper and the second gripper move closer to each other to clamp the material; conversely, during the entire process of the pull rod moving upward, the first swing arm and the second swing arm are driven to move upward, and the first gripper and the second gripper release the material and move to above the position where the material was clamped. The lower end of the pull rod is provided with a hinge seat. The first connecting rod and the second connecting rod are both hinged to the hinge seat. A spring is sleeved on the pull rod, and the spring is located between the inner top of the mounting base and the hinge seat. The eccentric rod includes a first shaft and a second shaft. The center lines of the first shaft and the second shaft are not on the same straight line. The first shaft is rotatably connected to the second middle hinge position, and the second shaft is connected to the rotating shaft of the first middle hinge position. An adjustment groove is opened at the end of the first shaft. The first swing arm is provided with a first clearance position at the first middle hinge position; the second swing arm is provided with a second clearance position at the second middle hinge position. The first swing arm has a sliding groove for sliding connection with the first gripper, and the sliding groove and the first clearance position are respectively located on the corresponding sides of the first swing arm. The first swing arm has a waist hole communicating with the sliding groove. The second swing arm has a mounting groove for mounting the second gripper, and the mounting groove and the second clearance position are respectively located on the corresponding sides of the second swing arm. The mounting base has a gate-shaped cross-section. The clamping assembly is located inside the mounting base. The mounting base is provided with fixed shafts that are respectively hinged to the first swing arm and the second swing arm. The second connecting rod on one clamping assembly shares a fixed shaft with the first connecting rod on the adjacent clamping assembly.

2. The adjustable gripper according to claim 1, characterized in that, The first gripper has a gripping groove, and the second gripper has a gripping surface. The gripping groove and the gripping surface work together to grip the material.

3. The adjustable clamping gripper according to claim 1, characterized in that, The mounting base has a notch for adjusting the position of the eccentric rod and the first gripper.

4. A cold heading machine, characterized in that, It includes a clamping platform and a gripper with an adjustable clamping position as described in any one of claims 1-3, wherein the gripper with the adjustable clamping position is disposed on the clamping platform.

Images