Cold header for nut and bolt production

Abstract

The utility model relates to the technical field of cold headers, and provides a cold header for nut and bolt production, which comprises a machine body, the top end of the machine body is fixedly connected with a lower clamping plate, the top end of the lower clamping plate is clamped with an upper clamping plate, one side of the lower clamping plate and one side of the upper clamping plate are fixedly connected with connecting pieces, and the two connecting pieces are rotatably connected. According to the stamping die, the upper clamping plate can be overturned through the connecting pieces on the outer sides of the lower clamping plate and the upper clamping plate, so that the stamping die clamped in the lower clamping plate and the upper clamping plate can be conveniently replaced, the operation is simple and convenient, and meanwhile, the stamping die can be conveniently replaced through the pressure generated by a first spring; and the extrusion plate can abut against the stamping die in the clamping groove, the situation that in the machining process, the stamping die and the machine body are loosened is prevented, the situation that the stamping die is disengaged from the interior of the machine body, the machining effect of bolts and nuts is affected is avoided, and the output of defective products and scraped products is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cold heading machines, and in particular to a cold heading machine for producing nuts and bolts. Background Art

[0002] Cold heading machine is a special equipment mainly used for batch production of nuts, bolts and other fasteners. It applies high pressure on metal materials through the die to make the metal plastically deformed, so as to quickly manufacture various precision parts, such as bolts, nuts, screws and other standard fasteners. The working principle of the cold heading machine is to use the die to apply high pressure on the metal material to make it plastically deformed in the die cavity to form a specified shape and size. This processing method does not require heating of the metal material, thus saving energy and reducing environmental pollution. The cold heading machine is equipped with stamping dies inside, and stamping dies of different shapes can produce bolts and nuts of different shapes.

[0003] It is not easy to quickly replace the stamping die in the traditional cold heading machine. At the same time, the clamping stability of the stamping die is low. When the stamping die is subjected to a large impact, the stamping die is prone to demoulding, thereby affecting the effect of bolt production and producing defective or even scrapped products. For this reason, a cold heading machine for nut and bolt production is proposed, which solves the above problems through a splicable lower clamping plate and an upper clamping plate and an extrusion rod connected by a first spring. Utility Model Content

[0004] The utility model provides a cold heading machine for producing nuts and bolts, which solves the problems of difficult replacement of stamping dies and unstable clamping of stamping dies.

[0005] The technical solution of the utility model is as follows:

[0006] A cold heading machine for producing nuts and bolts comprises a machine body, a lower clamping plate is fixedly connected to the top of the machine body, an upper clamping plate is clamped to the top of the lower clamping plate, a connecting piece is fixedly connected to one side of the lower clamping plate and the upper clamping plate, the two connecting pieces are rotatably connected, a stamping part clamping assembly is arranged inside the lower clamping plate and the upper clamping plate, the stamping part clamping assembly comprises a clamping groove opened on one side of the lower clamping plate and the upper clamping plate, an arc groove is opened inside the lower clamping plate and the upper clamping plate, a sliding rod is slidably connected to the inside of the arc groove, an extrusion rod is fixedly connected to one side of the sliding rod, and the extrusion rod passes through the clamping groove.

[0007] Preferably, the extrusion rods are provided in plurality and are arranged in a circular shape with equal distances, and the stamping part clamping assembly further comprises a first spring sleeved on the outer end of the slide rod, and the first spring is fixedly connected to the inside of the arc groove.

[0008] Preferably, the stamping part clamping assembly further comprises a fixing part fixedly connected to the lower clamping plate and one side of the upper clamping plate, a fixing bolt is threadedly connected between the two fixing parts, and a stamping die is clamped inside the clamping groove.

[0009] Preferably, a connecting hole is opened inside the body, and the connecting hole corresponds to the position of the clamping groove. The inside of the stamping die is slidably connected with a push rod, and the push rod is H-shaped. One end of the push rod is fixedly connected to a guide rod, and the guide rod is slidably connected to the inside of the connecting hole.

[0010] Preferably, a second spring is fixedly connected between the connecting hole and the guide rod, a guide hole is opened inside the body, the guide hole is communicated with the connecting hole, and the guide rod is slidably connected to the guide hole.

[0011] Preferably, a stamping plate is rotatably connected to one side of the body, an assembling plate is clamped at the top of the stamping plate, a clamping groove is provided at the top of the stamping plate and the bottom of the assembling plate, and bolts are threadedly connected between the stamping plate and the assembling plate.

[0012] The working principle and beneficial effects of the utility model are:

[0013] 1. In the utility model, the upper clamping plate can be turned over by connecting pieces on the outer sides of the lower clamping plate and the upper clamping plate, so that the stamping die clamped inside the lower clamping plate and the upper clamping plate can be replaced conveniently, and the operation is simple. At the same time, the pressure generated by the first spring can make the extrusion plate resist the stamping die inside the clamping groove, so as to prevent the stamping die and the machine body from loosening during the processing, and avoid the stamping die from detaching from the inside of the machine body, which affects the processing effect of the bolts and nuts and reduces the output of defective and scrapped products. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the lower clamping plate and the upper clamping plate of the utility model;

[0017] Figure 3 This is a schematic diagram of the internal structure of the upper splint of the utility model;

[0018] Figure 4 It is a side view of the utility model;

[0019] Figure 5 It is a schematic diagram of the internal structure of the body of the utility model.

[0020] In the figure: 1. body; 2. lower clamping plate; 3. connecting part; 4. upper clamping plate; 5. stamping part clamping assembly; 501. clamping groove; 502. arc groove; 503. slide rod; 504. extrusion rod; 505. first spring; 506. fixing part; 6. stamping die; 7. connecting hole; 8. push rod; 9. guide rod; 10. second spring; 11. guide hole; 12. stamping plate; 13. assembly plate. DETAILED DESCRIPTION

[0021] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Example 1

[0023] like Figure 1~Figure 3 As shown, a cold heading machine for producing nuts and bolts includes a machine body 1, a lower clamping plate 2 is fixedly connected to the top of the machine body 1, an upper clamping plate 4 is clamped to the top of the lower clamping plate 2, a connecting piece 3 is fixedly connected to one side of the lower clamping plate 2 and the upper clamping plate 4, the two connecting pieces 3 are rotatably connected, a stamping part clamping assembly 5 is provided inside the lower clamping plate 2 and the upper clamping plate 4, the stamping part clamping assembly 5 includes a clamping groove 501 opened on one side of the lower clamping plate 2 and the upper clamping plate 4, an arc groove 502 is opened inside the lower clamping plate 2 and the upper clamping plate 4, a slide rod 503 is slidably connected inside the arc groove 502, an extrusion rod 504 is fixedly connected to one side of the slide rod 503, and the extrusion rod 504 passes through the clamping groove 501. The purpose of this arrangement is that the connecting piece 3 arranged at the outer end of the lower clamp plate 2 and the upper clamp plate 4 facilitates the rotation of the upper clamp plate 4, thereby facilitating the replacement of the stamping die 6 clamped inside the lower clamp plate 2 and the upper clamp plate 4. The clamping groove 501 is used to clamp the stamping die 6. The extrusion rod 504 is arranged to resist the outer end of the stamping die 6 to achieve a clamping effect, thereby preventing the stamping die 6 from loosening or even detaching from the inside of the machine body 1 during processing, thereby affecting the processing effect of the bolts and nuts.

[0024] Preferably, a plurality of extrusion rods 504 are arranged in a circular shape with equal distances, and the stamping part clamping assembly 5 further includes a first spring 505 sleeved on the outer end of the slide rod 503, and the first spring 505 is fixedly connected to the inside of the arc groove 502. The purpose of this arrangement is that the elastic force generated by the first spring 505 increases the force of the extrusion rod 504 clamping the stamping die 6.

[0025] Preferably, the stamping part clamping assembly 5 further includes a fixing member 506 fixedly connected to one side of the lower clamping plate 2 and the upper clamping plate 4, a fixing bolt is threadedly connected between the two fixing members 506, and the inside of the clamping groove 501 is clamped with the stamping die 6. The purpose of this arrangement is that the fixing member 506 is used to fix the lower clamping plate 2 and the upper clamping plate 4 to prevent the lower clamping plate 2 and the upper clamping plate 4 from being separated due to impact during processing, thereby causing the stamping die 6 inside the lower clamping plate 2 and the upper clamping plate 4 to fall and become loose.

[0026] In this embodiment, before processing the bolts and nuts, the upper clamping plate 4 is rotated, and the stamping die 6 of a specific shape is placed in the clamping groove 501 at the top of the lower clamping plate 2, and the upper clamping plate 4 is rotated and the fixing parts 506 at the outer ends of the lower clamping plate 2 and the upper clamping plate 4 are fixed together using fixing bolts. During the process of clamping the stamping die 6 by the upper clamping plate 4 and the lower clamping plate 2, the sliding rod 503 at the outer end of the extrusion rod 504 slides inside the arc groove 502, and at the same time, the first spring 505 inside the arc groove 502 is compressed. The elastic force generated by the compression of the first spring 505 increases the force of the extrusion rod 504 to squeeze the outer end of the stamping die 6, thereby preventing the stamping die 6 from being loosened or even coming loose from the inside of the lower clamping plate 2 and the upper clamping plate 4 due to a large impact, thereby avoiding the machine body 1 from processing defective products or even scrapped products, resulting in material waste.

[0027] Example 2

[0028] like Figure 1~Figure 5 As shown, based on the same concept as the above-mentioned embodiment 1, this embodiment further proposes that a connecting hole 7 is opened inside the body 1, and the connecting hole 7 corresponds to the position of the clamping groove 501. A push rod 8 is slidably connected inside the stamping die 6, and the push rod 8 is H-shaped. One end of the push rod 8 is fixedly connected to a guide rod 9, and the guide rod 9 is slidably connected to the inside of the connecting hole 7. The purpose of this arrangement is that when the bolt inside the stamping die 6 is deformed by stamping, one end of the bolt contacts one end of the H-shaped push rod 8, and at this time the push rod 8 slides inside the stamping die 6, and at the same time, the other end of the push rod 8 drives the guide rod 9 to slide.

[0029] Preferably, a second spring 10 is fixedly connected between the connecting hole 7 and the guide rod 9, a guide hole 11 is provided inside the machine body 1, the guide hole 11 is in communication with the connecting hole 7, and the guide rod 9 is slidably connected with the guide hole 11. The purpose of this arrangement is that the guide rod 9 slides inside the guide hole 11, and the second spring 10 is compressed at the same time. After the bolt is stamped, the elastic force generated by the release of the second spring 10 drives the push rod 8 to push out the bolt inside the stamping die 6, so as to facilitate the demolding of the bolt.

[0030] Preferably, a stamping plate 12 is rotatably connected to one side of the body 1, and an assembly plate 13 is clamped at the top of the stamping plate 12. A clamping groove is provided at the top of the stamping plate 12 and the bottom of the assembly plate 13, and a bolt is threadedly connected between the stamping plate 12 and the assembly plate 13. The purpose of this arrangement is that the stamping plate 12 and the assembly plate 13 are convenient to disassemble, so as to facilitate the replacement of nut stamping parts of different shapes.

[0031] In this embodiment, when the bolt is deformed by stamping inside the stamping die 6, one end of the bolt contacts the push rod 8, so that the push rod 8 drives the guide rod 9 to slide, and the second spring 10 is compressed at the same time. After the bolt is stamped, the nut stamping part and the bolt inside the stamping plate 12 and the assembly plate 13 are separated, and the elastic force generated by the release of the compressed second spring 10 drives the push rod 8 to push out the bolt inside the stamping die 6, which facilitates demoulding and does not require manual removal of the bolt, thereby improving the production efficiency of the bolt.

[0032] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cold heading machine for producing nuts and bolts, comprising a machine body (1), characterized in that: The top of the machine body (1) is fixedly connected to a lower clamping plate (2), the top of the lower clamping plate (2) is clamped to an upper clamping plate (4), one side of the lower clamping plate (2) and the upper clamping plate (4) are fixedly connected to connecting pieces (3), the two connecting pieces (3) are rotatably connected to each other, a stamping part clamping assembly (5) is provided inside the lower clamping plate (2) and the upper clamping plate (4), the stamping part clamping assembly (5) comprises a clamping groove (501) provided on one side of the lower clamping plate (2) and the upper clamping plate (4), an arc groove (502) is provided inside the lower clamping plate (2) and the upper clamping plate (4), a sliding rod (503) is slidably connected inside the arc groove (502), one side of the sliding rod (503) is fixedly connected to an extrusion rod (504), and the extrusion rod (504) passes through the clamping groove (501).

2. A cold heading machine for producing nuts and bolts according to claim 1, characterized in that: The extrusion rods (504) are provided in plurality and are arranged in a circular shape with equal distances. The stamping part clamping assembly (5) further comprises a first spring (505) sleeved on the outer end of the slide rod (503), and the first spring (505) is fixedly connected to the inside of the arc groove (502).

3. A cold heading machine for producing nuts and bolts according to claim 1, characterized in that: The stamping part clamping assembly (5) further comprises a fixing part (506) fixedly connected to one side of the lower clamping plate (2) and the upper clamping plate (4), a fixing bolt being threadedly connected between the two fixing parts (506), and a stamping die (6) being clamped inside the clamping groove (501).

4. A cold heading machine for producing nuts and bolts according to claim 3, characterized in that: A connecting hole (7) is provided inside the machine body (1), and the connecting hole (7) corresponds to the position of the clamping groove (501). A push rod (8) is slidably connected inside the stamping die (6), and the push rod (8) is H-shaped. One end of the push rod (8) is fixedly connected to a guide rod (9), and the guide rod (9) is slidably connected to the inside of the connecting hole (7).

5. A cold heading machine for producing nuts and bolts according to claim 4, characterized in that: A second spring (10) is fixedly connected between the connecting hole (7) and the guide rod (9); a guide hole (11) is provided inside the machine body (1); the guide hole (11) is in communication with the connecting hole (7); and the guide rod (9) is slidably connected to the guide hole (11).

6. A cold heading machine for producing nuts and bolts according to claim 1, characterized in that: A stamping plate (12) is rotatably connected to one side of the machine body (1), an assembly plate (13) is clamped at the top end of the stamping plate (12), a clamping groove is provided at the top end of the stamping plate (12) and the bottom end of the assembly plate (13), and bolts are threadedly connected between the stamping plate (12) and the assembly plate (13).

Images