Ejector rod structure of cold header

Abstract

The utility model relates to an ejector rod structure of a cold header, which aims to solve the technical problem that metal sheets or burrs are generated due to irregular shapes caused by excessive upsetting impact on bars in the prior art, and comprises an ejector rod, one end of the ejector rod is fixedly connected with an impact end, and a telescopic rod is arranged above the impact end; by controlling the ejector rod and the impact end to perform upsetting relative to the telescopic rod, in the impact process after the rotating head is in contact with a bar, the connecting rod forwards controls the rotating head to impact and rotate at the same time, and generated edge extension parts and burrs are cut off under rotary friction of the edge line of the middle of the inclined plane between the punching opening and the impact hole. The production quality of nails is improved; after impact, the ejector rod drives the impact end to return, so that the rotating head rotates and resets under the action of the force of the torsion spring, in the process, the reset spring can eject the sliding rail moving downwards back, the cleaning plate is controlled by the volute spiral spring to reset, scrap iron adsorbed on the outer surface of the punching opening is cleaned in the rotation process of the rotating head, and the device is convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of cold heading machine top rods, in particular to a cold heading machine top rod structure. Background Art

[0002] Cold heading machine is a special equipment mainly used for mass production of fasteners such as nuts, bolts, nails, etc. Its ejector rod is used to cooperate with the template to perform upsetting and impact forming on the fasteners.

[0003] In the process of forging nails with the existing cold forging machine push rod, there is a certain distance between the push rod and the impact template. In the forging process, too much bar stock before the bar stock is fully formed will cause its edge to extend the impact hole under the impact, thereby causing metal flakes or burrs around the surface of the fastener, affecting the production quality of the fastener. In view of this, we propose a cold forging machine push rod structure. Utility Model Content

[0004] The utility model aims to overcome the deficiencies of the prior art, meet practical needs, and provide a cold heading machine top rod structure to solve the current technical problem of irregularly shaped metal flakes or burrs caused by excessive bar stock impact during upsetting.

[0005] In order to achieve the purpose of the utility model, the technical solution adopted by the utility model is as follows: a cold heading machine mandrel structure is designed, including a mandrel, one end of the mandrel is fixedly connected to an impact end, a telescopic rod is arranged above the impact end, an impact hole with an inclined edge is provided on the lower surface of the impact plate, and a connecting rod is fixedly connected to the upper surface of the impact end; a rotating block is symmetrically fixedly connected to the outer wall of the connecting rod, a torsion spring is fixedly connected to the upper surface of the connecting rod, a rotating head is arranged on the outer side of the connecting rod, a rotating groove matching the rotating block is provided on the inner wall of the rotating head, and a punching notch with a magnetic edge and an edge opposite to the connecting shaft is provided on the upper surface of the rotating head; the utility model controls the mandrel and the impact end to perform upsetting relative to the telescopic rod, and during the impact process after the rotating head contacts the bar material, the connecting rod forces the rotating block to slide inside the rotating groove forward, and further controls the rotating head to rotate while impacting, and the edge extension part and the burr generated are cut off under the rotational friction along the middle edge line of the inclined surface between the punching notch and the impact hole, thereby improving the production quality of the nails.

[0006] Preferably, a telescopic rod is provided on the outer side of the rotating head, a slide rail is provided on the outer surface of the rotating head, the inner surface of the slide rail is movably connected with a slider fixedly connected to the telescopic rod, one side of the outer surface of the telescopic rod is fixedly connected with a connecting shaft, the connecting shaft is movably connected with a cleaning plate through a volute spring, and the lower surface of the slider is fixedly connected to the inner wall of the slide rail through a reset spring; the utility model drives the impact end to retreat by the push rod after the impact, so that the rotating head rotates and resets under the action of the torsion spring force. During this process, the reset spring will push the downward-moving slide rail back, and control the reset of the cleaning plate through the volute spring to clean the iron filings adsorbed on the outer surface of the punching mouth during the rotation of the rotating head, thereby facilitating the use of the device.

[0007] Preferably, the distance that the upper end of the telescopic rod is higher than the upper edge of the rotating head is less than the length of the slide rail; when the telescopic rod contacts the lower surface of the impact plate and moves downward, it can be completely moved below the edge of the rotating head to avoid affecting the impact of the rotating head on the rod.

[0008] Preferably, the inclined surface of the punching notch is magnetic; the magnetic punching notch facilitates the adhesion of metal debris removed by rotational friction to prevent it from staying inside the impact hole.

[0009] Preferably, the cleaning plate is made of plastic and fits the outer surface of the punch; the cleaning plate made of plastic is lighter in weight, which reduces the impact on the use of the rotating head and prevents the cleaning plate from being affected by the magnetism of the outer surface of the punch during use.

[0010] Preferably, a gap is left between the telescopic rod and the rotating head, and the cleaning plate is located in the gap after being attached to one side of the telescopic rod; the gap between the telescopic rod and the rotating head is used for the telescopic rod to move downward after contacting the impact plate, and at the same time drive the cleaning plate to rotate on the outer surface of the connecting shaft to store the cleaning plate.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. The utility model controls the push rod and the impact end to be upset relative to the telescopic rod. During the impact process after the rotating head contacts the bar material, the connecting rod forces the rotating block to slide inside the rotating groove forward, and further controls the rotating head to rotate while impacting, and the edge extension part and burrs generated are cut off under the rotational friction of the middle edge line of the inclined surface between the punching notch and the impact hole, thereby improving the production quality of nails.

[0013] 2. The utility model drives the impact end to retreat by the impact push rod after the impact, so that the rotating head rotates and resets under the action of the torsion spring force. During this process, the reset spring will push the downward sliding rail back, and the scroll spring controls the cleaning plate to reset. During the rotation of the rotating head, the iron filings adsorbed on the outer surface of the punching port are cleaned, which is convenient for the use of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the side cross-sectional structure of the impact plate of the utility model;

[0016] Figure 3 It is a schematic diagram of the side cross-sectional structure of the rotating head of the utility model;

[0017] Figure 4 This is a schematic diagram of the slide rail structure of the utility model;

[0018] Figure 5 It is a schematic diagram of the torsion spring structure of the utility model;

[0019] In the figure: 1. push rod; 2. impact end; 201. connecting rod; 202. rotating head; 203. rotating block; 204. torsion spring; 205. rotating groove; 206. punching; 3. telescopic rod; 301. connecting shaft; 302. scroll spring; 303. cleaning plate; 304. slider; 305. reset spring; 306. slide rail; 4. impact plate; 401. impact hole. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0021] Embodiment: A cold heading machine top rod structure, see Figures 1 to 4 , comprising a top rod 1, one end of the top rod 1 is fixedly connected to an impact end 2, a telescopic rod 3 is arranged above the impact end 2, an impact hole 401 with an inclined edge is opened on the lower surface of the impact plate 4, and a connecting rod 201 is fixedly connected to the upper surface of the impact end 2; a rotating block 203 is symmetrically fixedly connected to the outer wall of the connecting rod 201, a torsion spring 204 is fixedly connected to the upper surface of the connecting rod 201, a rotating head 202 is arranged on the outer side of the connecting rod 201, and a rotating groove 205 matching the rotating block 203 is opened on the inner wall of the rotating head 202, and the rotating head 202 The upper surface is provided with a punching notch 206 whose edge is magnetic and opposite to the connecting shaft 301; the utility model controls the push rod 1 and the impact end 2 to perform upsetting relative to the telescopic rod 3. During the impact process after the rotating head 202 contacts the bar material, the connecting rod 201 forces the rotating block 203 to slide inside the rotating groove 205, and further controls the rotating head 202 to rotate while impacting, and the edge extension part and burrs generated are cut off under the rotational friction along the middle edge line of the inclined surface between the punching notch 206 and the impact hole 401, thereby improving the production quality of nails.

[0022] Specifically, a telescopic rod 3 is provided on the outer side of the rotating head 202, and a slide rail 306 is provided on the outer surface of the rotating head 202. The inner surface of the slide rail 306 is movably connected with a slider 304 fixedly connected to the telescopic rod 3. One side of the outer surface of the telescopic rod 3 is fixedly connected with a connecting shaft 301. The connecting shaft 301 is movably connected with a cleaning plate 303 through a volute spring 302. The lower surface of the slider 304 is fixedly connected to the inner wall of the slide rail 306 through a reset spring 305. The utility model drives the impact end 2 to retreat through the impact of the push rod 1, so that the rotating head 202 rotates and resets under the action of the torsion spring 204. In this process, the reset spring 305 will push the downwardly moved slide rail 306 back, and control the cleaning plate 303 to reset through the volute spring 302. During the rotation of the rotating head 202, the iron filings adsorbed on the outer surface of the punching mouth 206 are cleaned, which is convenient for the use of the device.

[0023] Furthermore, the distance that the upper end of the telescopic rod 3 is higher than the upper edge of the rotating head 202 is less than the length of the slide rail 306; when the telescopic rod 3 contacts the lower surface of the impact plate 4 and moves downward, it can be completely moved below the edge of the rotating head 202 to avoid affecting the impact of the rotating head 202 on the rod.

[0024] Furthermore, the inclined surface of the punching notch 206 is magnetic; the magnetic punching notch 206 facilitates the adhesion of metal debris removed by rotational friction, thereby preventing the metal debris from staying inside the impact hole 401 .

[0025] It is worth noting that the cleaning plate 303 is made of plastic and fits the outer surface of the punch 206; the cleaning plate 303 made of plastic is lightweight, which reduces the impact on the use of the rotating head 202 and prevents the cleaning plate 303 from being affected by the magnetism of the outer surface of the punch 206 during use.

[0026] It is worth noting that a gap is left between the telescopic rod 3 and the rotating head 202, and the cleaning plate 303 is located in the gap after being attached to one side of the telescopic rod 3; the gap between the telescopic rod 3 and the rotating head 202 is used for the telescopic rod 3 to move downward after contacting the impact plate 4, and at the same time drive the cleaning plate 303 to rotate on the outer surface of the connecting shaft 301 to store the cleaning plate 303.

[0027] Working principle: During the upsetting process, the push rod 1 controls the impact end 2 to drive the rotating head 202 to penetrate the rod material at the impact hole 401 inside the impact plate 4 to impact. During the impact process, the middle hole of the punching notch 206 first contacts the rod material, and then, under the continuous force of the push rod 1, the impact end 2 controls the connecting rod 201 to force the rotating block 203 to slide inside the rotating groove 205, and further controls the rotating head 202 to rotate while impacting, so that the edge extension part and burr generated are obliquely removed between the punching notch 206 and the impact hole 401. The middle edge line of the surface is cut off under the rotational friction, and then the cut iron chips are adsorbed on the outer surface of the punching notch 206 under the magnetic effect of the outer surface of the punching notch 206. During the reset process of the impact end 2 controlled by the push rod 1, the rotating head 202 is rotated and reset under the action of the torsion spring 204. At the same time, the reset spring 305 will push the downward slide rail 306 back, and the cleaning plate 303 is reset by the spiral spring 302 to clean the iron chips adsorbed on the outer surface of the punching notch 206 during the rotation of the rotating head 202, so as to facilitate the use of the device.

[0028] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A cold heading machine push rod structure, comprising a push rod (1), one end of the push rod (1) is fixedly connected to an impact end (2), a telescopic rod (3) is arranged above the impact end (2), and the telescopic rod (3) is in contact with the lower surface of an impact plate (4), characterized in that: The lower surface of the impact plate (4) is provided with an impact hole (401) with an inclined edge, and the upper surface of the impact end (2) is fixedly connected with a connecting rod (201); The outer wall of the connecting rod (201) is symmetrically fixedly connected to a rotating block (203), the upper surface of the connecting rod (201) is fixedly connected to a torsion spring (204), a rotating head (202) is arranged on the outer side of the connecting rod (201), the inner wall of the rotating head (202) is provided with a rotating groove (205) matching the rotating block (203), and the upper surface of the rotating head (202) is provided with a punching notch (206) with a magnetic edge and the edge is opposite to the connecting shaft (301).

2. The cold heading machine top rod structure according to claim 1, characterized in that: A telescopic rod (3) is arranged on the outer side of the rotating head (202); a slide rail (306) is provided on the outer surface of the rotating head (202); a slider (304) fixedly connected to the telescopic rod (3) is movably connected to the inner surface of the slide rail (306); a connecting shaft (301) is fixedly connected to one side of the outer surface of the telescopic rod (3); the connecting shaft (301) is movably connected to a cleaning plate (303) via a volute spring (302); and a lower surface of the slider (304) is fixedly connected to the inner wall of the slide rail (306) via a return spring (305).

3. The cold heading machine top rod structure according to claim 2, characterized in that: The distance that the upper end of the telescopic rod (3) is higher than the upper edge of the rotating head (202) is less than the length of the slide rail (306).

4. The cold heading machine top rod structure according to claim 1, characterized in that: The inclined surface of the punching notch (206) is magnetic.

5. The cold heading machine top rod structure according to claim 2, characterized in that: The cleaning plate (303) is made of plastic material and fits the outer surface of the punching opening (206).

6. The cold heading machine top rod structure according to claim 2, characterized in that: A gap is left between the telescopic rod (3) and the rotating head (202), and the cleaning plate (303) is located in the gap after being attached to one side of the telescopic rod (3).

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