Flared cold heading tongs

Abstract

The utility model discloses a flared cold upsetting tongs, including mounting bracket, the top of mounting bracket is connected with the tongs seat, and the middle part of tongs seat forms the installation cavity, is equipped with two tongs that are symmetrically arranged and cross each other in the installation cavity, and the middle part of tongs is rotatably connected with tongs seat, and one end of tongs extends to the outside of tongs seat and forms the claw, and the other end of tongs is connected with telescopic link, and one end of telescopic link extends to the outside of tongs seat and is connected with counterforce link and is buckled, and the middle part of counterforce link is rotatably connected with mounting bracket, and counterforce link forms the compression part away from telescopic link one end, and one side of compression part is equipped with the elastic element of fixedly connected mounting bracket, and the other side of compression part is equipped with extruding block, and the middle part of extruding block is rotatably connected with mounting bracket, and the end of extruding block is connected with drive assembly. The utility model can increase the opening distance of tongs after opening.

Description

Technical Field

[0001] This utility model relates to a cold heading clamp, and more particularly to a flared cold heading clamp. Background Technology

[0002] Current cold heading dies mainly consist of a fixed die frame, a moving die frame, a forming die core, a punch, a return rod, and cold heading clamps. The punch is slidably connected to the moving die frame, the forming die core is fixedly connected within the fixed die frame, and the return rod is slidably connected within the fixed die frame and located inside the forming die core. In operation, the cold heading clamps first transport the cold heading blank between the forming die core and the punch. Then, the cold heading clamps open while the punch pushes out, pushing the cold heading blank into the forming die core. The cold heading blank is then cold-headed through the mutual compression between the forming die core and the punch. After the cold heading blank is formed, the punch retracts while the return rod inside the forming die core pushes out, causing the cold heading blank to detach from the forming die core and return to the clamping position. Finally, the cold heading clamps clamp the cold heading blank and transport it laterally to the next station.

[0003] Based on the above, existing cold heading clamps only require an opening for the punch to pass through during use, resulting in the opening size being controlled to be slightly larger than the outer diameter of the punch during design. However, with the development of cold heading technology, some manufacturers have developed a new type of cold heading die. This new die requires the moving die holder to pass through the cold heading clamp along with the punch during operation. Conventional cold heading clamps, limited by their opening and closing structure, cannot achieve the required opening distance for the moving die holder to pass through, thus reducing the applicability of the new cold heading clamp.

[0004] Therefore, a cold heading clamp with a large opening distance is needed. Utility Model Content

[0005] The purpose of this invention is to provide a flared cold heading clamp. It can increase the opening distance of the clamp after it is opened.

[0006] The technical solution of this utility model: a flared cold heading clamp, including a mounting frame, a clamp seat connected to the top of the mounting frame, a mounting cavity formed in the middle of the clamp seat, two clamps arranged symmetrically and crossing each other in the mounting cavity, the middle of the clamps rotatably connected to the clamp seat, one end of the clamps extending to the outside of the clamp seat and forming a gripper, the other end of the clamps connected to a telescopic rod, one end of the telescopic rod extending to the outside of the clamp seat and fastened to a reaction rod, the middle of the reaction rod rotatably connected to the mounting frame, the reaction rod forming a pressure part at the end away from the telescopic rod, an elastic element fixedly connected to the mounting frame on one side of the pressure part, a pressing block on the other side of the pressure part, the middle of the pressing block rotatably connected to the mounting frame, and a drive assembly connected to the end of the pressing block;

[0007] The reaction rod is used to drive the telescopic rod to extend or retract after rotation;

[0008] The telescopic rod is used to drive the two clamps to open and close after extension and retraction;

[0009] The elastic element is used to compress the reaction rod in its natural state, so that the telescopic rod is in a retracted state.

[0010] The compression block is used to compress the reaction rod under the drive of the drive assembly, so that the reaction rod overcomes the elastic force of the elastic element under the compression action and drives the telescopic rod to extend outward.

[0011] In the aforementioned flared cold heading clamp, the end of the reaction rod is provided with two symmetrical reaction plates, and a groove is formed between the two reaction plates for the telescopic rod to pass through.

[0012] In the aforementioned flared cold heading clamp, a first retaining ring is fixedly connected to the telescopic rod on one side of the groove, and a second retaining ring is connected to the telescopic rod on the other side of the groove. A fixing nut is threadedly connected to the telescopic rod outside the second retaining ring.

[0013] In the aforementioned flared cold heading clamp, the clamp is L-shaped, with one end extending to the outside of the clamp seat and detachably connected to the jaws.

[0014] In the aforementioned flared cold heading clamp, the telescopic rod and the clamp are connected to each other via a transmission part. There are two transmission parts, which are symmetrically arranged in the mounting cavity. One end of the transmission part is rotatably connected to the telescopic rod, and the other end of the transmission part is rotatably connected to the end of the clamp.

[0015] In the aforementioned flared cold heading clamp, the clamp seat includes a split upper clamp seat and a lower clamp seat. Both sides of the upper clamp seat and the lower clamp seat are provided with partitions, and an installation cavity is formed between the two partitions. The upper clamp seat, the lower clamp seat and the mounting frame are connected to each other by fixing bolts located inside the partitions.

[0016] In the aforementioned flared cold heading clamp, the drive assembly includes a spindle, and a drive plate is fixedly connected to the outside of the spindle. The drive plate is used to drive the extrusion block as the spindle rotates, so that the extrusion block performs a reciprocating oscillating motion under the driving action.

[0017] In the aforementioned flared cold heading clamp, the end of the extrusion block is threadedly connected to an adjusting screw, the end of which passes through the extrusion block and fits against the pressure-bearing part.

[0018] Compared with the prior art, this utility model has the following characteristics:

[0019] (1) The present invention uses the structure of clamp seat, clamp and telescopic rod to enable the telescopic rod to drive the clamp to open and close by telescopic extension; on this basis, the structure of reaction rod, elastic element and extrusion block is combined so that when the clamp is in the clamping state, the elastic element can apply a continuous inward extrusion force to the telescopic rod through the reaction rod, so that the clamp clamps the cold heading billet under the action of the extrusion force; when it is necessary to open the clamp, the drive component drives the reaction rod through the extrusion block, so that the reaction rod overcomes the elastic force of the elastic element and drives the telescopic rod to extend outward, thereby driving the clamp to open to both sides; under the above combination, the present invention can improve the opening and closing stability of the clamp on the one hand, and effectively increase the opening distance of the clamp after opening on the other hand, thereby improving its applicability.

[0020] (2) By coordinating the structure of the drive assembly, the extrusion block and the reaction rod, this utility model can control the clamp to perform continuous opening and closing actions by rotating the main shaft, thereby improving the synchronization of multiple clamps on the same mounting frame and reducing the number of drive components required for each clamp to perform opening and closing actions, thus reducing the equipment cost.

[0021] Therefore, this invention can increase the opening distance of the clamps after they are opened. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a diagram of the connection structure of the clamps in the open state;

[0024] Figure 3 This is a diagram of the connection structure of the clamps in the clamping state.

[0025] The labels in the attached diagram are as follows: 1-mounting bracket, 2-clamp seat, 3-mounting cavity, 4-clamp, 5-gripper, 6-telescopic rod, 7-reaction rod, 8-elastic element, 9-pressing block, 10-fixing nut, 11-transmission part, 12-main shaft, 13-drive plate, 14-adjusting screw, 201-upper clamp seat, 202-upper clamp seat, 203-partition, 601-first retaining ring, 602-second retaining ring, 701-pressure-bearing part, 702-reaction plate. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0027] Example. A flared cold heading clamp, configured as follows: Figure 1As shown, the device includes a mounting frame 1, a clamp seat 2 connected to the top of the mounting frame 1, a mounting cavity 3 formed in the middle of the clamp seat 2, two clamps 4 arranged symmetrically and intersecting each other in the mounting cavity 3, the middle of the clamps 4 rotatably connected to the clamp seat 2, one end of the clamps 4 extending to the outside of the clamp seat 2 and forming a gripper 5, the other end of the clamps 4 connected to a telescopic rod 6, one end of the telescopic rod 6 extending to the outside of the clamp seat 2 and fastened to a reaction rod 7, the middle of the reaction rod 7 rotatably connected to the mounting frame 1, the reaction rod 7 forming a pressure part 701 at the end away from the telescopic rod 6, an elastic element 8 fixedly connected to the mounting frame 1 on one side of the pressure part 701, the elastic element 8 can be a compression spring, the other side of the pressure part 701 is provided with a pressing block 9, the middle of the pressing block 9 rotatably connected to the mounting frame 1, and the end of the pressing block 9 connected to a drive assembly;

[0028] The reaction rod 7 is used to drive the telescopic rod 6 to extend or retract after rotation;

[0029] The telescopic rod 6 is used to drive the two clamps 4 to open and close after extension and retraction;

[0030] The elastic element 8 is used to compress the reaction rod 7 in its natural state so that the telescopic rod 6 is in a contracted state.

[0031] The compression block 9 is used to compress the reaction rod 7 under the drive of the drive assembly, so that the reaction rod 7 overcomes the elastic force of the elastic element 8 under the compression action and drives the telescopic rod 6 to extend outward.

[0032] The end of the reaction rod 7 is provided with two symmetrical reaction plates 702, and a groove is formed between the two reaction plates 702 for the telescopic rod 6 to pass through.

[0033] A first retaining ring 601 is fixedly connected to the telescopic rod 6 on one side of the groove, and a second retaining ring 602 is slidably connected to the telescopic rod 6 on the other side of the groove. A gap is left between the first retaining ring 601 and the second retaining ring 602 to allow the reaction plate 702 to swing left and right. A fixing nut 10 is threadedly connected to the telescopic rod 6 outside the second retaining ring 602. One end of the reaction plate 702 passes through the gap between the first retaining ring 601 and the second retaining ring 602 and extends to the top of the telescopic rod 6.

[0034] The clamp 4 is L-shaped. One end of the clamp 4 extends to the outside of the clamp seat 2 and is connected to the jaw 5 by screws. When the telescopic rod 6 is in the retracted state, the jaws 5 on both sides of the clamp 4 surround each other to form a clamping opening for clamping the cold heading billet.

[0035] The two clamps 4 have the same shape and both ends are provided with stepped grooves; when the clamps 4 are installed in place, the two clamps 4 cross each other at the stepped grooves, and the two clamps 4 at the crossing position are distributed vertically and fit together; the cross-sectional shape of the claws 5 is Z-shaped, and the ends of the two claws 5 extend to the outside of the clamps 4 and are at the same height after being installed in place.

[0036] The telescopic rod 6 and the clamp 4 are connected to each other via a transmission part 11. There are two transmission parts 11, which are symmetrically arranged in the mounting cavity 3. One end of the transmission part 11 is rotatably connected to the telescopic rod 6, and the other end of the transmission part 11 is rotatably connected to the end of the clamp 4.

[0037] The clamp seat 2 includes a split upper clamp seat 201 and a lower clamp seat 202. Both sides of the upper clamp seat 201 and the lower clamp seat 202 are provided with partitions 203, and an installation cavity 3 is formed between the two partitions 203. One end of the partition 203 forms a guide surface for guiding the telescopic rod 6. The upper clamp seat 201, the lower clamp seat 202 and the mounting frame 1 are connected to each other by fixing bolts located inside the partition 203.

[0038] The drive assembly includes a main shaft 12, and a drive plate 13 is fixedly connected to the outside of the main shaft 12. The drive plate 13 is used to drive the extrusion block 9 as the main shaft 12 rotates, so that the extrusion block 9 performs a reciprocating oscillating motion under the driving action.

[0039] The end of the mounting bracket 1 is rotatably connected to the main shaft 12 and forms an axial limit with the main shaft 12. The mounting bracket 1 is externally connected to a fixing device to fix the position of the mounting bracket 1. The fixing device can be an electric push rod, one end of which is rotatably connected to the mounting bracket 1. When the electric push rod is in the retracted state, the clamp 4 is in the clamping position and is used to clamp the cold heading billet. When the electric push rod is in the ejected state, the mounting bracket 1 rotates so that the clamp 4 is away from the clamping position, which facilitates the operator to make subsequent adjustments to the cold heading clamp.

[0040] The spindle 12 is externally connected to a translation device, which drives the spindle 12 to move laterally during cold heading, so that the clamp 4 clamps the cold heading blank and moves it to the next station through lateral movement.

[0041] The end of the extrusion block 9 is threadedly connected to an adjusting screw 14, the end of which passes through the extrusion block 9 and is in contact with the pressure-bearing part 701.

[0042] The working principle of this invention is as follows: When this invention is in operation, the mounting bracket 1 and the clamp seat 2 remain fixed in position on the main shaft 12, and the clamp 4 remains vertical and is used to clamp the cold heading billet. When the main shaft 12 rotates to the point where the drive plate 13 is in the outward ejection state, the drive plate 13 applies an outward extrusion force to the extrusion block 9, causing the extrusion block 9 to move along the... Figure 1 The mechanism rotates counterclockwise, and during this rotation, the adjusting screw 14 applies a hard compression to the reaction rod 7. After being compressed by the adjusting screw 14, the reaction rod 7 overcomes the elastic force of the elastic element 8 and rotates clockwise. During this rotation, the reaction plate 702 applies an upward compressive force to the telescopic rod 6, causing it to extend outwards. Once extended, the telescopic rod 6 drives the two clamps 4 via the transmission unit 11, causing them to rotate in opposite directions and open their end jaws 5 outwards, thus creating a gap for the punch or moving mold frame to pass through.

[0043] Similarly, when the main shaft 12 rotates to the non-outlet state of the drive plate 13, the drive plate 13 releases the rigid limit on the extrusion block 9, allowing the extrusion block 9 and the reaction rod 7 to rotate freely. In this state, the rebound force of the elastic element 8 can drive the reaction rod 7 to rotate counterclockwise, and the reaction plate 702 applies a downward compressive force to the telescopic rod 6 during rotation, causing the telescopic rod 6 to slide downward to the retracted state under the compressive force. After the telescopic rod 6 retracts inward, the two grippers 5 retract inward and clamp the cold heading blank. After the clamp 4 is clamped in place, the elastic element 8 remains in the retracted state and applies a continuous compressive force to the clamp 4 through the reaction rod 7 and the telescopic rod 6, causing the clamp 4 to clamp the cold heading blank under the compressive force, effectively preventing the cold heading blank from loosening and falling off during subsequent lateral movement.

Claims

1. A flared-mouth cold heading clamp, characterized in that: The mounting bracket (1) is connected to a clamp seat (2) at the top of the mounting bracket (1). A mounting cavity (3) is formed in the middle of the clamp seat (2). Two clamps (4) are symmetrically arranged and intersecting each other in the mounting cavity (3). The middle of the clamps (4) is rotatably connected to the clamp seat (2). One end of the clamps (4) extends to the outside of the clamp seat (2) and forms a claw (5). The other end of the clamps (4) is connected to a telescopic rod (6). One end of the telescopic rod (6) extends to the outside of the clamp seat (2) and is fastened to a reaction rod (7). The middle of the reaction rod (7) is rotatably connected to the mounting bracket (1). The reaction rod (7) forms a pressure part (701) at the end away from the telescopic rod (6). An elastic element (8) is fixedly connected to the mounting bracket (1) on one side of the pressure part (701). An extrusion block (9) is provided on the other side of the pressure part (701). The middle of the extrusion block (9) is rotatably connected to the mounting bracket (1). The end of the extrusion block (9) is connected to a drive assembly. The reaction rod (7) is used to drive the telescopic rod (6) to extend or retract after rotation; The telescopic rod (6) is used to drive the two clamps (4) to open and close after extension and retraction; The elastic element (8) is used to compress the reaction rod (7) in its natural state so that the telescopic rod (6) is in a contracted state; The extrusion block (9) is used to extrude the reaction rod (7) under the drive of the drive assembly, so that the reaction rod (7) overcomes the elastic force of the elastic element (8) under the extrusion action and drives the telescopic rod (6) to extend outward.

2. The flared cold heading clamp according to claim 1, characterized in that: The end of the reaction rod (7) is provided with two symmetrical reaction plates (702), and a groove is formed between the two reaction plates (702) for the telescopic rod (6) to pass through.

3. The flared cold heading clamp according to claim 2, characterized in that: A first retaining ring (601) is fixedly connected to the telescopic rod (6) on one side of the groove, and a second retaining ring (602) is connected to the telescopic rod (6) on the other side of the groove. A fixing nut (10) is threadedly connected to the telescopic rod (6) outside the second retaining ring (602).

4. The flared cold heading clamp according to claim 1, characterized in that: The clamp (4) is L-shaped, with one end of the clamp (4) extending to the outside of the clamp seat (2) and detachably connected to the jaws (5).

5. The flared cold heading clamp according to claim 1, characterized in that: The telescopic rod (6) and the clamp (4) are connected to each other via a transmission part (11). There are two transmission parts (11) and they are symmetrically arranged in the mounting cavity (3). One end of the transmission part (11) is rotatably connected to the telescopic rod (6), and the other end of the transmission part (11) is rotatably connected to the end of the clamp (4).

6. The flared cold heading clamp according to claim 1, characterized in that: The clamp seat (2) includes a split upper clamp seat (201) and a lower clamp seat (202). Both sides of the upper clamp seat (201) and the lower clamp seat (202) are provided with partitions (203), and an installation cavity (3) is formed between the two partitions (203). The upper clamp seat (201), the lower clamp seat (202) and the mounting bracket (1) are connected to each other by fixing bolts located inside the partitions (203).

7. The flared cold heading clamp according to claim 1, characterized in that: The drive assembly includes a main shaft (12), and a drive plate (13) is fixedly connected to the outside of the main shaft (12). The drive plate (13) is used to drive the extrusion block (9) as the main shaft (12) rotates, so that the extrusion block (9) makes a reciprocating swinging motion under the driving action.

8. The flared cold heading clamp according to claim 1, characterized in that: The end of the extrusion block (9) is threadedly connected to an adjusting screw (14), the end of which passes through the extrusion block (9) and fits against the pressure part (701).

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