A clamping device for cold heading machine

Abstract

The present invention discloses a cold heading machine clamp device, which belongs to the field of new energy vehicle parts production. In view of the technical problems that the existing cold heading machine clamp system is prone to motion interference with the clamp when using a large-diameter T-shaped punch, and the punch needs to be cut, resulting in reduced strength, the present device achieves avoidance through the coordinated action of clamp opening and closing and lifting. Its technical solution includes: the clamp box assembly moves up and down under the guidance of a track, the pull button drives the core block to move up and down to control the opening and closing of the clamp legs, the lifting and locking mechanism fixes or releases the position of the clamp box through the push rod and a small spring, and the reset spring ensures that the clamp legs are closed to clamp the workpiece. The device can avoid collision between the punch and the clamp, retain the complete structural strength of the punch, adapt to the high-frequency production rhythm of 40-100 times / minute, significantly improve the part processing efficiency and mold service life, and is suitable for continuous cold heading of various special-shaped aluminum alloy parts.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicle parts production, and in particular to a cold heading machine clamp device. Background Art

[0002] In the field of new energy vehicle parts manufacturing, cold heading machines are widely used in the forming of metal parts. Some aluminum alloy parts with special shapes (such as T-shaped structural parts) require the use of large-diameter T-shaped punches for cold heading. However, the clamping device of the traditional cold heading machine has significant defects in operation: when the punch moves back and forth, especially at the extreme position close to the die, the conventional clamp will still interfere with the punch even if it is fully opened (such as Figure 1 To avoid collisions, existing technologies typically cut the interfering portion of the punch. However, this severely weakens the punch's overall strength and durability, shortening the mold's lifespan and increasing maintenance costs. It also fails to meet the demands of continuous production of high-precision parts.

[0003] Currently, no publicly available technical solutions for clamping devices have been found that effectively address this interference issue. Conventional clamping devices only have a single opening and closing function and lack an adjustment mechanism that coordinates with the punch's motion, making them difficult to adapt to the complex working conditions of large-diameter punches. Therefore, a new clamping device is urgently needed that can stably clamp the workpiece, dynamically adjust the clamp position to avoid collision with the punch, and balance mold strength and production efficiency. Summary of the Invention

[0004] The purpose of the solution of this application is to use a specially designed clamp device that not only opens and closes the clamp, but also increases the overall lifting action to avoid collision between the punch and the clamp. This device can adapt to the cold heading production of various parts.

[0005] To achieve the above objectives, this application provides the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides a cold heading machine clamping device, characterized in that it includes:

[0007] The clamp box assembly is welded together by a clamp box top plate, a clamp box side plate and a clamp box bottom plate, and forms an accommodating space inside;

[0008] The track assembly is fixed in front of the cold heading machine cavity and is provided with grooves and stop protrusions in the up and down directions to guide the lifting and lowering movement of the clamp box assembly;

[0009] The clamp drive mechanism includes a pull button and a core block, wherein the pull button is connected to the cold heading machine drive lever, and the core block is linked to the pull button and controls the opening and closing of the clamp legs through the arc profile when moving up and down;

[0010] A clamp leg assembly, comprising a pair of clamp legs and clamp claws, wherein the clamp legs are hinged to the clamp box assembly via pins and are opened and closed by the movement of the core block, and the clamp claws are connected to the ends of the clamp legs to clamp the workpiece;

[0011] The lifting and locking mechanism includes a push rod, a stopper and a small spring. The push rod can move laterally and be inserted into the small hole in the track groove to fix the position of the clamp box. The small spring drives the push rod to reset.

[0012] a return spring for closing the clamp legs as the core moves downward;

[0013] The clamp device synchronously controls the opening and closing of the clamp legs and the lifting and lowering of the clamp box assembly through the up and down movement of the pull button, thereby avoiding interference with the large-diameter T-shaped punch of the cold heading machine.

[0014] Preferably, the core block is made of wear-resistant steel, and a protrusion is provided at the end of its arc-shaped profile to limit the maximum opening angle of the clamp legs.

[0015] Preferably, a stop protrusion is provided at the bottom of the groove of the track assembly for limiting the downward movement limit position of the clamp box assembly.

[0016] Preferably, the top plate, side plates and bottom plate of the clamp box are welded with 7 series aluminum alloy to improve wear resistance and structural strength.

[0017] Preferably, the clamping jaws are connected to the clamping legs via adjustable screws to adapt to the clamping requirements of workpieces of different sizes.

[0018] Preferably, the return spring is a long spring, which is always in a tensioned state and is used to close the clamp legs when the core block moves downward.

[0019] Preferably, the working process of the lifting and locking mechanism is: when the core block moves up to the pit and contacts the push rod, the push rod contracts under the action of a small spring, the clamp box is unlocked and moves up along the track; when the core block moves down and disengages from the push rod, the push rod is inserted into the small hole of the track to fix the clamp box.

[0020] Preferably, the arc-shaped portion of the clamp leg contacts the arc-shaped contour of the core block, and the up and down movement of the core block is converted into a rotating opening and closing action of the clamp leg.

[0021] Preferably, the device is provided with 6 groups of clamp boxes, which move periodically in the transverse direction to achieve continuous production.

[0022] Preferably, the clamping surface of the clamping claw is arc-shaped and is in close contact with the outer surface of the workpiece to improve clamping stability.

[0023] The clamping device of the present invention can realize the simple, stable and reliable clamping and transfer of product parts, thereby achieving the purpose of avoiding collision and interference with a larger diameter punch, and has a good effect after actual application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments of the present application.

[0025] Figure 1 The figure is a schematic diagram of the motion interference of the clamp system of the existing cold heading machine;

[0026] Figure 2 FIG1 is a schematic diagram of the appearance of the clamp device of the present invention in a closed state;

[0027] Figure 3 FIG. b is a schematic diagram of the appearance of the clamp device of the present invention in a closed state;

[0028] Figure 4 This is a structural schematic diagram of the clamp system of the present invention when the clamp cover is removed in the closed state;

[0029] Figure 5 Schematic diagram a of the structure of the clamp device of the present invention when the clamp cover is removed in the open state;

[0030] Figure 6 Schematic diagram b of the structure of the clamp device of the present invention when the clamp cover is removed in the open state;

[0031] Figure 7 Schematic diagram c of the structure of the clamp device of the present invention when the clamp cover is removed in the open state;

[0032] Figure 8 Schematic diagram of the outer structure of the track of the present invention;

[0033] Figure 9 Schematic diagram of the outer structure of the core block of the present invention;

[0034] Figure 10 Schematic diagram of the external structure of the clamp legs of the present invention;

[0035] Figure 11 Schematic diagram of the external structure of the clamping claw of the present invention.

[0036] Among them, 1 is the pull button, 2 is the track, 3 is the pin, 4 is the long spring B, 5 is the clamp leg, 6 is the clamp claw, 7 is the product part, 8 is the small spring, 9 is the stop block, 10 is the push rod, 11 is the core block, 12 is the clamp box top plate, and 13 is the die cavity. DETAILED DESCRIPTION

[0037] The following describes in detail embodiments of the present application. Examples of various embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present application and are not to be construed as limiting the present application.

[0038] It will be understood by those skilled in the art that, unless otherwise stated, the singular forms "a," "an," and "the" used herein may also include the plural forms. It should be further understood that the term "comprising" used in the specification of this application refers to the presence of features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. The term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0039] In order to make the objectives, technical solutions and advantages of this application clearer, the specific implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0040] Example 1:

[0041] like Figure 2-11 The figure shows a cold heading machine clamp device of the present invention, the main structure of the device is:

[0042] The clamp box assembly is welded together by a clamp box top plate 12, a clamp box side plate and a clamp box bottom plate, and forms an accommodation space inside;

[0043] The track assembly is fixed in front of the cold heading machine cavity 13 and is provided with grooves and stop protrusions in the up and down directions to guide the lifting movement of the clamp box assembly;

[0044] The clamp drive mechanism includes a pull button 1 and a core block 11. The pull button 1 is connected to the cold heading machine drive lever. The core block 11 is linked to the pull button 1 and controls the opening and closing of the clamp legs 5 through the arc profile when moving up and down;

[0045] The clamp leg assembly includes a pair of clamp legs 5 and clamp claws 6. The clamp legs 5 are hinged to the clamp box assembly through pins 3 and can be opened and closed by moving the core block 11. The clamp claws 6 are connected to the ends of the clamp legs 5 to clamp the workpiece.

[0046] The lifting and locking mechanism includes a push rod 10, a stopper 9 and a small spring 8. The push rod 10 can move laterally and be inserted into the small hole in the track groove to fix the position of the clamp box. The small spring 8 drives the push rod 10 to reset.

[0047] a return spring for closing the clamp legs 5 when the core block 11 moves downward;

[0048] The clamp device synchronously controls the opening and closing of the clamp legs 5 and the lifting and lowering of the clamp box assembly through the up and down movement of the pull button 1, thereby avoiding interference with the large-diameter T-shaped punch of the cold heading machine.

[0049] The knob 1 is connected to the lever that opens and closes the cold heading machine's clamps. Driven by the lever, it can move up and down, transmitting this motion to the core block 11 below, driving the core block 11 up and down synchronously. When the knob 1 moves upward, the clamp jaws 6 open. When the knob moves downward, the clamp jaws 6 close.

[0050] The top, side, and bottom plates of the clamp box are made of 7-series aluminum alloy, which is hard and wear-resistant. They are welded together to form a whole, forming the outer shell of the clamp box.

[0051] Track 2 has a concave die in the up and down direction, which allows the clamp box to slide up and down in the groove. The lower end of the track has a stop protrusion to determine the lowest moving position of the clamp box.

[0052] The small spring 8, push rod 10 and stopper 9 are combined together. The stopper 9 is fixed to the bottom plate of the clamp box. The push rod 10 can move horizontally. The small spring 8 pushes the push rod to expose the stopper 9, so that the head of the push rod 10 enters the small hole on the track, so that the position of the clamp box is fixed on the slide rail. When the push rod retracts to its original position, the position of the clamp box is no longer fixed, and the clamp box can move up and down along the track.

[0053] Core block 11, made of wear-resistant steel, is connected to knob 1. As knob 1 moves up and down, its arc-shaped outer contour contacts clamp legs 5, controlling the opening and closing of clamp legs 5. At the end of the arc, core block 11 has two protrusions that limit the maximum opening of clamp legs 5.

[0054] The long spring 4 is always in a state of tension, and its function is to pull the two clamp legs together to produce a closing action, thereby clamping the product parts.

[0055] The pin 3 is a rotating shaft fixed on the clamp box.

[0056] The clamp legs 5 are made of low carbon steel and reciprocate around the pin. The arc portion of the clamp legs 5 contacts the arc portion of the core block 11 to control the opening and closing of the clamp legs 5.

[0057] The clamping jaws 6 are made of low-carbon steel. When closed, they clamp the workpiece. They are screwed to the clamping legs 5, allowing for adjustment of their relative position. This allows for the jaws 6 to be adjusted so that, when closed, their arcuate surfaces closely contact the outer surface of the workpiece, adapting to the clamping requirements of workpieces of varying sizes.

[0058] The working principle of the device is:

[0059] The device is installed in front of the die cavity of the cold heading machine and connected to the clamp drive device of the cold heading machine to open and close the clamping part and move the clamp box up and down. At the same time, the clamp boxes in a group of 6 perform overall horizontal periodic movement.

[0060] A typical cold heading machine operates at a normal speed of 40-100 cycles per minute. During operation, the cold heading machine continuously extrudes the product's shape. As the part is forced by the punch into the cold heading die, the raw metal deforms under the force of the extrusion, forming the desired shape. Once the punch completes the cold heading extrusion process in other stations, it begins to move away from the die.

[0061] As the punch moves from distal to proximal toward the die, the device holds the part and waits directly in front of the die. Once the punch and part make contact, the cold heading machine's opening and closing mechanism drives the lever to pull the knob upward, driving the core block upward. Because the core block's arc-shaped area contacts the arc-shaped areas of the clamp legs, the clamp legs begin to open as the core block moves upward. At this point, the part enters the die.

[0062] As the punch continues to move toward the die, the knob and core continue to move upward. When the recess on the core's stem contacts the push rod, a small spring forces the push rod to retract, allowing the clamp box to move between the track and the clamp. At this point, the protrusions at each end of the core's lower portion contact the curved areas of the clamp legs, halting further expansion. The clamp box, as a whole, begins to move upward along the track, preventing the punch from striking the clamp claws and other components.

[0063] The clamp's lateral movement mechanism is activated to move the clamp as a whole toward the upper workstation.

[0064] When the extrusion process is complete, the punch begins to move away from the die, and the part is ejected from the die by the cold heading mechanism. At this point, the device waits in front of the die. Once the part has been ejected a certain distance, the cold heading mechanism begins. A lever drives the knob box core downward, and the clamp box as a whole moves downward. The clamp box stops moving downward when its base contacts the protrusion at the lower end of the track. The core block continues to move downward, and the rod recess and push rod disengage. The thicker rod pushes the push rod, and the small end of the push rod inserts into the small hole in the track, further securing the clamp box in place.

[0065] The core block continues to move downward, and under the tension of the large spring, the two clamp legs begin to close, driving the clamp claws to close and clamp the product workpiece.

[0066] This cycle is repeated to achieve the goal of continuous production.

[0067] After adopting this device, the product parts can be stably clamped and transferred simply, stably and reliably, achieving the purpose of avoiding collision and interference with larger diameter punches, and the effect is good after actual application.

[0068] The above content is merely an example and explanation of the structure of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the scope of protection of the present invention.

Claims

1. A cold heading machine clamp device, characterized in that: include: The clamp box assembly is welded together by a clamp box top plate, a clamp box side plate and a clamp box bottom plate, and forms an accommodating space inside; The track assembly is fixed in front of the cold heading machine cavity and is provided with grooves and stop protrusions in the up and down directions for guiding the lifting and lowering movement of the clamp box assembly; a stop protrusion is provided at the bottom of the groove for limiting the downward movement limit position of the clamp box assembly; The clamp drive mechanism includes a pull button and a core block, wherein the pull button is connected to the cold heading machine drive lever, and the core block is linked to the pull button and controls the opening and closing of the clamp legs through the arc profile when moving up and down; A clamp leg assembly, comprising a pair of clamp legs and clamp claws, wherein the clamp legs are hinged to the clamp box assembly via pins and are opened and closed by the movement of the core block, and the clamp claws are connected to the ends of the clamp legs to clamp the workpiece; The lifting and locking mechanism includes a push rod, a stopper and a small spring. The push rod can move laterally and be inserted into the small hole in the track groove to fix the position of the clamp box. The small spring drives the push rod to reset. a return spring for closing the clamp legs as the core moves downward; The clamp device controls the opening and closing of the clamp legs and the lifting and lowering of the clamp box assembly synchronously through the up and down movement of the pull button, thereby avoiding interference with the large-diameter T-shaped punch of the cold heading machine; The working process of the lifting and locking mechanism is as follows: when the core block moves up to the pit and contacts the push rod, the push rod contracts under the action of the small spring, the clamp box is unlocked and moves up along the track; When the core block moves down and away from the push rod, the push rod is inserted into the track hole to fix the clamp box.

2. The cold heading machine clamp device according to claim 1, characterized in that: The core block is made of wear-resistant steel, and a protrusion is provided at the end of the arc-shaped profile to limit the maximum opening angle of the clamp legs.

3. The cold heading machine clamp device according to claim 1, characterized in that: The top plate, side plates and bottom plate of the clamp box are welded with 7 series aluminum alloy to improve wear resistance and structural strength.

4. The cold heading machine clamp device according to claim 1, characterized in that: The clamping jaws are connected to the clamping legs via adjustable screws to accommodate workpieces of different sizes.

5. The cold heading machine clamp device according to claim 1, characterized in that: The return spring is a long spring that is always in a tensioned state and is used to close the clamp legs when the core block moves downward.

6. The cold heading machine clamp device according to claim 1, characterized in that: The arc-shaped portion of the clamp leg contacts the arc-shaped contour of the core block, and the up and down movement of the core block is converted into a rotating opening and closing action of the clamp leg.

7. The cold heading machine clamp device according to claim 1, characterized in that: The device is provided with 6 groups of clamp boxes, which move periodically in the transverse direction to achieve continuous production.

8. The cold heading machine clamp device according to claim 1, characterized in that: The clamping surface of the clamping claw is arc-shaped and is in close contact with the outer surface of the workpiece to improve the clamping stability.

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