Clamp mechanism of cold header

Abstract

The utility model discloses a clamp mechanism of a cold header. The clamp mechanism comprises a transition warped plate driven by a cam, a stretching warped plate, a clamp transmission assembly and an elastic clamp. Small clamping blocks with tower-shaped springs are arranged on a left clamping plate and a right clamping plate of the clamp and can elastically clamp small-size bars, and clamping grooves rigidly clamp large-size bars. The adjusting screw controls the opening degree of the clamp, and the reset air cylinder ensures action reset. According to the mechanism, the problems that an existing clamp is narrow in clamping range and fixed in opening degree are solved, and the machining adaptability and efficiency of the cold header are improved.

Description

Technical Field

[0001] This utility model relates to the field of cold heading machines, specifically to a clamping mechanism for a cold heading machine. Background Technology

[0002] The working principle of a cold heading machine is to gradually shape metal wire into a specific form at high speed using a series of replicating molds, hammers, and punches without heating. Specifically, the cold heading machine feeds the wire into the machine, cuts it to the appropriate length, and then hammers and shapes it. The entire process does not involve heating or processing the metal; the shaping is completed at room temperature.

[0003] Existing clamps have a fixed opening and limited clamping force, which makes them prone to loosening when clamping small-sized bars and unable to adapt flexibly to large-sized bars. Conventional clamps use rigid clamping blocks and cannot adjust the opening, thus limiting their applicability. Therefore, there is an urgent need for a clamping mechanism that can adaptively adjust the clamping force and opening. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this invention is to provide a cold heading machine clamping mechanism that can adapt to bar stock of different sizes, provides stable clamping, and has an adjustable opening.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a clamping mechanism for a cold heading machine, comprising a cam (1) driven by a motor, a transition rocker (2), a tension rocker (3), a clamping transmission assembly (4), a clamp (5), and a reset cylinder (6), characterized in that:

[0006] One end of the transition rocker (2) is provided with a roller (21) that contacts the cam (1), and the other end is screwed with an adjusting screw (22). The lower end of the adjusting screw (22) contacts the upper part of the transmission end of the tension rocker (3).

[0007] The lower part of the transmission end of the stretching rocker (3) is in contact with the piston rod (61) of the reset cylinder (6), and the output end is movably connected to the upper end of the telescopic rod (41) of the clamp transmission assembly (4).

[0008] The clamp (5) includes left and right clamping plates (51, 52), and the ends of the left and right clamping plates are respectively provided with symmetrical clamping grooves (53). A small clamping block (54) that can be elastically retracted is provided in the clamping groove (53). A guide groove (531) is provided on the inner wall of the clamping groove (53). A tower-shaped spring (55) is installed in the guide groove (531). One end of the tower-shaped spring (55) is connected to the small clamping block (54), and the other end is fixed by the rear cover (532).

[0009] The clamp transmission assembly (4) includes a base (42), and two "L"-shaped swing arms (43) are provided inside the base (42). One end of one swing arm (43) is connected to the left clamping plate (51, 52), and one end of the other swing arm (43) is connected to the right clamping plate (52). The other ends of the two swing arms (43) are movably connected to the side end of the connecting piece (44), and the upper end of the connecting piece (44) is movably connected to the telescopic rod (41).

[0010] The adjusting screw (22) is connected to the transition rocker (2) by a thread, and its lower end forms an adjustable gap contact with the transmission end of the tension rocker (3).

[0011] The clamping surface of the small clamping block (54) is provided with an arc-shaped clamping groove (541), and the curvature of the arc-shaped clamping groove (541) is smaller than the curvature of the clamping surface of the clamping groove (53).

[0012] The maximum compression stroke of the tower-shaped spring (55) is 1.5-2 times the outer diameter of the spring wire.

[0013] The reset cylinder (6) is supplied with air by an air pump, and its piston rod (61) is in elastic contact with the lower part of the transmission end of the tension rocker (3).

[0014] The depth of the guide groove (531) is greater than the thickness of the small clamping block (54). Limiting steps are provided on both sides of the guide groove (531), and a limiting flange that mates with the limiting steps is provided on the small clamping block. The beneficial effects of this utility model are:

[0015] 1. Through the synergistic effect of the elastic small clamping blocks and the rigid clamping groove, it can adapt to bars of different diameters and avoid slippage;

[0016] 2. Adjusting the screw allows for stepless adjustment of the clamp opening, improving processing flexibility;

[0017] 3. The tower-shaped spring has a large compression stroke, providing stable elastic force and resistance to fatigue.

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0019] Figure 1 This is a structural diagram of a specific embodiment of the present utility model;

[0020] Figure 2 This is a structural diagram of the clamp transmission assembly in a specific embodiment of the present utility model;

[0021] Figure 3 This is a cross-sectional view of the left clamping plate in a specific embodiment of this utility model;

[0022] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0023] In the diagram: 1. Cam; 2. Transition rocker; 21. Roller; 22. Adjusting screw; 3. Tension rocker; 4. Clamp transmission assembly; 41. Telescopic rod; 42. Seat; 43. Swing arm; 44. Connector; 5. Clamp; 51. Left clamp; 52. Right clamp; 53. Clamping groove; 531. Guide groove; 532. Rear cover; 54. Small clamping block; 541. Arc-shaped clamping groove; 55. Tower-shaped spring; 6. Reset cylinder; 61. Piston rod. Detailed Implementation

[0024] The present invention will be described in detail below through embodiments, which are only used to further illustrate the present invention and should not be construed as limiting the scope of protection of the present invention.

[0025] like Figure 1 — Figure 4 As shown, this embodiment discloses a clamping mechanism for a cold heading machine, including a cam 1 driven by a motor, a transition rocker 2, a tension rocker 3, a clamping transmission assembly 4, a clamp 5, and a reset cylinder 6, wherein:

[0026] One end of the transition rocker 2 is provided with a roller 21 that contacts the cam 1, and the other end is screwed with an adjusting screw 22. The lower end of the adjusting screw 22 contacts the upper part of the transmission end of the tension rocker 3.

[0027] The lower part of the transmission end of the stretch rocker 3 contacts the piston rod 61 of the reset cylinder 6, and the output end is movably connected to the upper end of the telescopic rod 41 of the clamp transmission assembly 4.

[0028] The clamp 5 includes left and right clamping plates (51, 52), and the ends of the left and right clamping plates are respectively provided with symmetrical clamping grooves 53. Small clamping blocks 54 that can be elastically retracted are provided in the clamping grooves 53. The inner wall of the clamping grooves 53 is provided with guide grooves 531. A tower-shaped spring 55 is installed in the guide grooves 531. One end of the tower-shaped spring 55 is connected to the small clamping block 54, and the other end is fixed by the rear cover 532.

[0029] The clamp transmission assembly 4 includes a base 42, and two "L"-shaped swing arms 43 are provided inside the base 42. One end of one swing arm 43 is connected to the left clamping plate 51, and one end of the other swing arm 43 is connected to the right clamping plate 52. The other ends of the two swing arms 43 are movably connected to the side end of the connecting piece 44, and the upper end of the connecting piece 44 is movably connected to the telescopic rod 41.

[0030] The adjusting screw 22 is connected to the transition rocker plate 2 by a thread, and its lower end forms an adjustable gap movable contact with the transmission end of the tension rocker plate 3.

[0031] The clamping surface of the small clamping block 54 is provided with an arc-shaped clamping groove 541, and the curvature of the arc-shaped clamping groove 541 is smaller than the curvature of the clamping surface of the clamping groove 53.

[0032] The maximum compression stroke of the tower spring 55 is 1.5-2 times the outer diameter of the spring wire, which provides the maximum extension and retraction of the small clamping block 54.

[0033] The reset cylinder 6 is supplied with air by an air pump, and its piston rod 61 is in elastic contact with the lower part of the transmission end of the tension rocker 3.

[0034] The depth of the guide groove 531 is greater than the thickness of the small clamping block 54. Limiting steps are provided on both sides of the guide groove 531, and limiting flanges that cooperate with the limiting steps are provided on the small clamping block.

[0035] Action sequence: Cam 1 is driven to rotate by a motor, causing transition rocker 2 to swing. The adjusting screw 22 of transition rocker 2 presses down on the transmission end of extension rocker 3, causing extension rocker 3 to swing around the fulcrum, driving telescopic rod 41 to move downward and driving clamp 5 to close. Reset cylinder 6 pushes extension rocker 3 back to its original position via piston rod 61, ensuring continuous action.

[0036] The left and right clamping plates (51, 52) of the clamp 5 are linked to the telescopic rod 41 via the swing arm 43. The small clamping block 54 in the clamping groove 53 extends outward under the action of the spring 55 to clamp the small bar material, such as 6mm in diameter; when the diameter of the bar material is larger than the opening of the clamping groove 53, such as 12mm, the small clamping block 54 retracts into the guide groove 531 and is directly clamped by the clamping groove 53.

[0037] Adjustment method:

[0038] Tightening the adjusting screw 22 changes its extension length, which can adjust the swing amplitude of the stretching rocker 3, thereby controlling the maximum opening of the clamp 5, such as 8-15mm, to adapt to different specifications of bar stock. Example

[0039] Taking a bar stock with a diameter of 5-15mm as an example, the adjusting screw 22 adjusts the clamp opening to 12mm. When the arc groove 541 of the small clamping block 54 clamps a 5mm bar stock, the spring 55 is compressed by 1.2mm, providing a clamping force ≥50N. When clamping a 15mm bar stock, the small clamping block 54 is fully retracted, and the clamping groove 53 provides rigid clamping.

[0040] Its main structural principle includes: clamping structure: small clamping blocks that can be elastically retracted are set in the clamping grooves of the left and right clamping plates of the clamp. The elastic force is provided by the tower-shaped spring. When clamping small bars, the small clamping blocks extend outward to clamp tightly, and when clamping large bars, they retract inward and are supported by the clamping groove.

[0041] Opening adjustment: An adjusting screw is installed between the transition rocker and the tension rocker. By turning the screw, the contact position between the transition rocker and the tension rocker is changed, thereby adjusting the travel of the telescopic rod and controlling the clamp opening.

[0042] Reset mechanism: The reset cylinder pushes the tension rocker to reset, ensuring that the clamping action is continuous when the cam rotates.

[0043] After adopting the above technical solution:

[0044] 1. Through the synergistic effect of the elastic small clamping blocks and the rigid clamping groove, it can adapt to bars of different diameters and avoid slippage;

[0045] 2. Adjusting the screw allows for stepless adjustment of the clamp opening, improving processing flexibility;

[0046] 3. The tower-shaped spring has a large compression stroke, providing stable elastic force and resistance to fatigue.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered illustrative and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0048] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A clamping mechanism for a cold heading machine, comprising a cam (1) driven by a motor, a transition rocker (2), a tension rocker (3), a clamping transmission assembly (4), a clamp (5), and a reset cylinder (6), characterized in that: One end of the transition rocker (2) is provided with a roller (21) that contacts the cam (1), and the other end is screwed with an adjusting screw (22). The lower end of the adjusting screw (22) contacts the upper part of the transmission end of the tension rocker (3). The lower part of the transmission end of the stretching rocker (3) is in contact with the piston rod (61) of the reset cylinder (6), and the output end is movably connected to the upper end of the telescopic rod (41) of the clamp transmission assembly (4). The clamp (5) includes left and right clamping plates (51, 52), and the ends of the left and right clamping plates are respectively provided with symmetrical clamping grooves (53). A small clamping block (54) that can be elastically retracted is provided in the clamping groove (53). A guide groove (531) is provided on the inner wall of the clamping groove (53). A tower-shaped spring (55) is installed in the guide groove (531). One end of the tower-shaped spring (55) is connected to the small clamping block (54), and the other end is fixed by the rear cover (532). The clamp transmission assembly (4) includes a base (42), and two "L"-shaped swing arms (43) are provided inside the base (42). One end of one swing arm (43) is connected to the left clamping plate (51, 52), and one end of the other swing arm (43) is connected to the right clamping plate (52). The other ends of the two swing arms (43) are movably connected to the side end of the connecting piece (44), and the upper end of the connecting piece (44) is movably connected to the telescopic rod (41).

2. The clamping mechanism of the cold heading machine according to claim 1, characterized in that: The adjusting screw (22) is connected to the transition rocker (2) by a thread, and its lower end forms an adjustable gap contact with the transmission end of the tension rocker (3).

3. The clamping mechanism of the cold heading machine according to claim 1, characterized in that: The clamping surface of the small clamping block (54) is provided with an arc-shaped clamping groove (541), and the curvature of the arc-shaped clamping groove (541) is smaller than the curvature of the clamping surface of the clamping groove (53).

4. The clamping mechanism of the cold heading machine according to claim 1, characterized in that: The maximum compression stroke of the tower-shaped spring (55) is 1.5-2 times the outer diameter of the spring wire.

5. The clamping mechanism of the cold heading machine according to claim 1, characterized in that: The reset cylinder (6) is supplied with air by an air pump, and its piston rod (61) is in elastic contact with the lower part of the transmission end of the tension rocker (3).

6. The clamping mechanism of the cold heading machine according to claim 1, characterized in that: The depth of the guide groove (531) is greater than the thickness of the small clamping block (54). Limiting steps are provided on both sides of the guide groove (531), and a limiting flange that cooperates with the limiting steps is provided on the small clamping block.

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