Mold scraping device

Abstract

The utility model discloses a die scraping device which is applied to a cold heading machine, the cold heading machine comprises a cold heading bottom module and a clamp module, and the die scraping device is characterized in that the die scraping device is fixed on the cold heading bottom module, the die scraping device comprises a support with a mounting hole, the support is provided with a torsional spring fixing piece used for being connected with a torsional spring in a sleeved mode, and the torsional spring fixing piece is provided with a clamping groove. A torsional spring fixing piece is arranged on the support, a scraping piece close to a die opening of the clamp module is rotatably fixed to the torsional spring fixing piece, a first positioning pin is arranged on the support, a second positioning pin is arranged on the scraping piece, and the torsional spring is fixedly installed through the first positioning pin and the second positioning pin. Due to the fact that the die scraping device is additionally arranged on the cold header, when impurities such as burrs are reserved on the die orifice of the clamp module and the whole clamp module moves, the scraping piece of the die scraping device can scrape the impurities such as the burrs, and therefore the surface roughness and the appearance of products can be guaranteed, and the yield is improved.

Description

Technical Field

[0001] This utility model relates to the field of manufacturing technology of cold heading forming machines, and in particular to a scraping device. Background Technology

[0002] A cold heading machine is a forging and forming device that thickens the top of bars or coils at room temperature. It is a specialized machine mainly used for the mass production of fasteners such as nuts and bolts. The working principle of a cold heading machine is that power is transmitted through pulleys or gears, and linear reciprocating motion is achieved through crank connecting rods, slide mechanisms, etc. The interaction between the cold heading bottom module and the clamping module causes the blank of the workpiece to undergo plastic deformation or separation.

[0003] Taking a six-station cold heading machine (six-die six-punch cold heading machine) on the market as an example, it usually corresponds to six workpiece processing flows. Each station is responsible for different forming processes (such as cutting, heading, stamping, etc.), and the workpieces are transferred one die at a time through the clamping module. Each station corresponds to one processing step, and finally one finished workpiece is produced.

[0004] A six-station cold heading machine includes six cold heading stations arranged side-by-side. Each cold heading station corresponds to a clamp and a bottom die. For example, the first cold heading station has a first clamp and a first bottom die; the second cold heading station has a second clamp and a second bottom die; the third cold heading station has a third clamp and a third bottom die; the fourth cold heading station has a fourth clamp and a fourth bottom die; the fifth cold heading station has a fifth clamp and a fifth bottom die; and the sixth cold heading station has a sixth clamp and a sixth bottom die. In addition, it usually includes extra auxiliary clamps, such as a "six-station, seven-clamp" design, for finished product transfer.

[0005] In the cold heading base module and clamp module, the punches or dies undergo multiple upsetting processes. During cold extrusion, after the punches and dies press and cold-forge the blank, burrs and other impurities remain at the ends of the die openings. These burrs and impurities are formed by the impact during cold heading. Especially after the sixth cold heading station and the sixth clamp upsetting, which are part of the finishing process, the product is already in its final form. If burrs or other impurities remain on the clamps, these impurities will be forged and adhered to the surface of the product, affecting its surface roughness and appearance, and reducing the yield rate. Summary of the Invention

[0006] The purpose of this invention is to provide a scraping device to solve the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, this utility model is achieved through the following technical measures: a scraping device is applied to a cold heading machine, the cold heading machine including a cold heading bottom module and a clamping module, characterized in that: a scraping device is fixed on the cold heading bottom module, the scraping device includes a bracket with mounting holes, a torsion spring fixing member is provided on the bracket for fitting a torsion spring, a scraper blade close to the die opening of the clamping module is rotatably fixed on the torsion spring fixing member, a first positioning pin is provided on the bracket, a second positioning pin is provided on the scraper blade, and the torsion spring is fixedly installed through the first positioning pin and the second positioning pin.

[0008] Compared with the prior art, the advantages of this utility model are: by adding a scraping device to the cold heading machine, when there are burrs or other impurities on the die opening of the clamping module, the scraper blade of the scraping device can scrape off the burrs or other impurities when the entire clamping module moves, thereby ensuring the surface roughness and appearance of the product and improving the yield.

[0009] As an improvement of this utility model, the torsion spring fixing component is a flat-headed pin with a hole. The purpose of this design is that it has a smooth rod-shaped pin to support the torsion spring, the front end of the pin is a cotter pin to fix the entire pin shaft, and the rear end of the pin is a pin cap to prevent the torsion spring from dislodging.

[0010] As an improvement of this utility model, the torsion spring fixing member is a stepped bolt. The purpose of choosing this design is as another embodiment of the torsion spring fixing member. The middle section of the stepped bolt is a smooth stepped cylinder used to fit the torsion spring. The front end of the smooth cylinder is a threaded section, which is used to fix the stepped bolt with a nut. The rear end of the smooth cylinder is a nut, which plays a role in preventing the torsion spring from dislodging.

[0011] As an improvement to this utility model, the scraper blade is L-shaped. The purpose of this design is that the vertical end of the L-shape overcomes the elastic potential energy of the torsion spring and is used to scrape off burrs.

[0012] As an improvement of this utility model, the scraping device is installed on the clamping plate of the cold heading bottom module, with its scraper blade positioned opposite the die opening of the last clamp on the clamping module. The purpose of this design is that the preceding stations are for roughing, while the last station is for finishing, so the scraping device is positioned above the position where the last clamp releases the workpiece. Attached Figure Description

[0013] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0014] In the attached diagram:

[0015] Figure 1This is a schematic diagram showing the position of the scraping device described in this utility model during scraping on a cold heading machine.

[0016] Figure 2 This is an enlarged view of part A of the present invention.

[0017] Figure 3 This is a three-dimensional schematic diagram of the scraping device described in this utility model.

[0018] Figure 4 This is a schematic diagram showing the initial position of the scraping device described in this utility model on the cold heading machine.

[0019] Figure 5 This is a three-dimensional schematic diagram of the flat-headed pin with holes described in this utility model.

[0020] Figure 6 This is a three-dimensional schematic diagram of the stepped bolt described in this utility model.

[0021] Explanation of reference numerals in the attached drawings: 1. Cold heading bottom module; 2. Clamping module; 3. Mounting hole; 4. Bracket; 5. Torsion spring; 6. Torsion spring fixing piece; 7. Die opening; 8. Scraper; 9. First positioning pin; 10. Second positioning pin; 11. Clamping plate; 12. #7 clamping body; 13. Pin cover; 14. Pin post; 15. Cotter pin; 16. Stepped cylinder. Detailed Implementation

[0022] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0023] Example 1

[0024] Please refer to Figure 1 -6.

[0025] This embodiment provides a die-scraping device applied to a cold heading machine. The cold heading machine includes a cold heading base module 1 and a clamping module 2. Taking a six-station cold heading machine (six-die, six-punch cold heading machine) on the market as an example...

[0026] In the embodiments of this utility model application, such as Figure 1As shown, the six-station cold heading machine includes six cold heading stations arranged side by side. Each cold heading station includes a cold heading base module 1 and a clamping module 2. Cold heading station #1 is equipped with clamp #1 and a first base die; cold heading station #2 is equipped with clamp #2 and a second base die; cold heading station #3 is equipped with clamp #3 and a third base die; cold heading station #4 is equipped with clamp #4 and a fourth base die; cold heading station #5 is equipped with clamp #5 and a fifth base die; and cold heading station #6 is equipped with clamp #6 and a sixth base die. Additionally, it typically includes an extra auxiliary clamp #7, resulting in a "six-station, seven-clamp" design. Through the clamps in clamping module 2, the workpiece is transferred one die at a time for processing, thus achieving the transfer of the finished product.

[0027] A scraping device is fixed on the cold heading base module 1. Specifically, the scraping device is installed on the clamping plate 11 of the cold heading base module 1, with its scraper blade 8 positioned opposite the die opening 7 of the #7 clamp body 12 (the last clamp) on the clamping module 2. This is because the preceding workstations are rough machining processes, and minor burrs or impurities will not cause major problems. The last workstation is a finishing workstation, and burrs or impurities will affect the surface roughness and appearance of the product. Therefore, the scraping device is positioned above the position where the last clamp releases the workpiece.

[0028] In the embodiments of this utility model application, such as Figure 2 and Figure 3 As shown. The scraping device includes a bracket 4 with mounting holes 3, which is fixed to the clamp plate 11 by bolts. The bracket 4 is equipped with a torsion spring fixing member 6 for fitting a torsion spring 5. A scraper blade 8, close to the die opening 7 of the clamp module 2, is rotatably fixed to the torsion spring fixing member 6. The bracket 4 is equipped with a first positioning pin 9, and the scraper blade 8 is equipped with a second positioning pin 10. The torsion spring 5 is fixedly installed via the first positioning pin 9 and the second positioning pin 10. This structure allows the torsion spring 5, due to its elastic potential energy, to give the scraper blade 8 a certain degree of flexibility when removing impurities, preventing scratches on the equipment body. Furthermore, the torsion spring 5, due to its width, can axially press down on the scraper blade 8, ensuring that the scraper blade 8 remains in contact with the bracket 4, thus maintaining the initial position of the scraper blade 8 unchanged (the scraper blade 8 will not shift after multiple movements).

[0029] In the embodiments of this utility model application, such as Figure 5 As shown. The torsion spring fixing component 6 is a flat-headed pin with a hole. A smooth rod-shaped pin 14 is provided on the flat-headed pin with a hole, which serves to support the torsion spring 5. The front end of the pin 14 is a cotter pin 15, which is used to fix the entire pin. The rear end of the pin 14 is a pin cap 13, which serves to prevent the torsion spring 5 from dislodging.

[0030] In the embodiments of this utility model application, such as Figure 6As shown. The torsion spring fixing member 6 is a stepped bolt. As another embodiment of the torsion spring fixing member 6, the middle section of the stepped bolt is a smooth stepped cylinder 16, which is used to fit the torsion spring 5. The front end of the smooth cylinder is a threaded section, which is used to fix the stepped bolt by a nut. The rear end of the stepped cylinder 16 is a nut, which plays a role in preventing the torsion spring 5 from dislodging.

[0031] Furthermore, the scraper 8 is L-shaped. The vertical end of the L-shape contacts the die opening 7, and under the elastic potential energy of the torsion spring 5, it is used to scrape off residual burrs and other impurities.

[0032] The scraping device provided in this embodiment is connected as follows: the entire scraping device is threadedly fixed to the clamp plate 11 of the cold heading bottom module 1 through the mounting hole 3 on the bracket 4; the bracket 4 and the scraper 8 are rotatably connected through the torsion spring fixing member 6.

[0033] The beneficial effects of this utility model are as follows: Burrs and other impurities remain on the die opening 7 of the clamp module 2. As the entire clamp module 2 moves die by die, the scraper blade 8 of the scraping device can scrape away the burrs and other impurities on the #7 clamp, thereby ensuring the surface roughness and appearance of the product and improving the yield rate. Furthermore, because a torsion spring 5 is provided, the scraper blade 8 is flexible and will not scratch the cold heading machine body.

[0034] In the description of this utility model, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A scraping device for use on a cold heading machine, the cold heading machine comprising a cold heading bottom module (1) and a clamping module (2), characterized in that: in The cold heading bottom module (1) is fixed with a scraping device, which includes a bracket (4) with a mounting hole (3). The bracket (4) is provided with a torsion spring fixing member (6) for fitting a torsion spring (5). The torsion spring fixing member (6) is rotatably fixed with a scraper (8) close to the die opening (7) of the clamping module (2). The bracket (4) is provided with a first positioning pin (9), and the scraper (8) is provided with a second positioning pin (10). The torsion spring (5) is fixedly installed by the first positioning pin (9) and the second positioning pin (10).

2. The scraping device according to claim 1, characterized in that: The torsion spring fixing member (6) is a flat-headed pin with a hole.

3. The scraping device according to claim 1, characterized in that: The torsion spring fixing member (6) is a stepped bolt.

4. The scraping device according to claim 1, characterized in that: The scraper (8) is L-shaped.

5. The scraping device according to claim 1, characterized in that: The scraping device is installed on the clamp plate (11) of the cold heading bottom module (1), and its scraper (8) is positioned to face the die opening (7) of the last clamp on the clamp module (2).

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