Annular carbon paper stamping device and stamping method thereof

Abstract

The invention discloses an annular carbon paper stamping device and a stamping method thereof.The stamping device comprises a press machine, the press machine is provided with a workbench and a first moving part located above the workbench, the first moving part is provided with a cylindrical upper punch, a female die is arranged in the workbench, and carbon paper to be stamped is placed on the female die; an inner core is arranged in the female die, a stamping gap is formed between the female die and the inner core, a lower punch capable of lifting carbon paper to be stamped is placed in the stamping gap, and the first moving part drives the upper punch to move downwards to enter the stamping gap and enables the carbon paper to be stamped to be connected to the lower punch in a pressing mode so that annular carbon paper can be manufactured; the stamping method comprises the steps of S1, stamping preparation, S2, feeding, S3, blanking, S4, thickness pressing, S5, stripping and material blowing and the like. The carbon paper stamping device has the beneficial effects that through the arrangement of the upper punch, the stamping gap and the lower punch, stamping of annular carbon paper is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of carbon paper punching equipment, and in particular to a ring-shaped carbon paper punching device and a punching method thereof. Background Art

[0002] Carbon paper plays an important role in the synthesis process of diamond. Its thickness, density and porosity directly affect the synthesis quality of diamond. At present, in order to save production costs in the process of diamond synthesis, most of the carbon paper sheets are purchased thicker, and then stamped into carbon paper sheets of the required thickness. The thickness control of carbon paper sheets processed by existing molds is not precise enough, and most of them are disc-shaped carbon paper. The disc-shaped carbon paper has a simple structure and the molds used are easy to design and process. However, with the development of new diamond synthesis processes, higher and more requirements are put forward for the consistency of carbon paper thickness and shape, such as circular ring-shaped carbon paper.

[0003] The patent with the publication number of "CN218138411U" discloses "a single-cell carbon paper cutting device for a hydrogen fuel cell engine system", including a bottom plate and a fixed mounting plate, a buffer pad is installed on the top of the bottom plate, and the buffer pad is arranged horizontally, a matching special knife die is arranged directly above the buffer pad, and the special knife die is arranged horizontally, the fixed mounting plate is installed on the top of the special knife die, and a first pillar is fixedly connected to one end of the top of the bottom plate and arranged vertically, a second pillar is fixedly connected to the top of the fixed mounting plate and arranged vertically, and a connecting mechanism for connecting the second pillar is provided on the first pillar. However, the device only realizes the cutting of carbon paper, and does not uniformly crimp its thickness.

[0004] To this end, our company proposes a circular carbon paper punching device and a punching method thereof. Summary of the invention

[0005] The object of the present invention is to provide a circular ring-shaped carbon paper punching device and a punching method thereof, which can not only punch out circular ring-shaped carbon paper, but also make the thickness of the punched carbon paper more uniform.

[0006] To achieve the above object, the present invention adopts the following technical solutions: A ring-shaped carbon paper punching device and a punching method thereof, comprising a press machine, the press machine having a workbench and a first movable part located above the workbench, the first movable part being provided with a cylindrical upper punch, the workbench being provided with a female mold, the carbon paper to be punched being placed on the female mold, the female mold being provided with an inner core, a punching gap being formed between the female mold and the inner core, a lower punch being placed in the punching gap for lifting the carbon paper to be punched, the first movable part driving the upper punch to move downward into the punching gap and crimping the carbon paper to be punched onto the lower punch to form the ring-shaped carbon paper.

[0007] Preferably, a female die transition plate is provided in the workbench, the female die is located inside the female die transition plate, the female die is connected to the inner core by bolts, the top of the lower punch extends into the stamping gap, and the side wall of the lower punch is provided with a strip groove for the bolts to pass through.

[0008] Preferably, the height of the strip groove is 8-15 times the thickness of the carbon paper to be punched.

[0009] Preferably, the press machine further comprises a second moving part located below the workbench, and the lower punch is arranged on the second moving part and can move up and down with the movement of the second moving part.

[0010] Preferably, a cylinder for accommodating the inner core is provided at the upper end of the lower punch, the strip groove is opened on the side wall of the cylinder, and the depth of the cylinder is 1-2 times the height of the female mold.

[0011] Preferably, a height adjustment rod is arranged above the second moving part, the height adjustment rod is screwed to a height adjustment nut via a thread at an upper end thereof, and the lower punch is arranged on the height adjustment nut.

[0012] Preferably, a top screw for fixing the height adjustment rod is passed through the side wall of the height adjustment nut.

[0013] Preferably, a lower punch pad and a lower punch positioning plate are also arranged between the lower punch and the height adjustment nut. The lower punch pad and the lower punch positioning plate are fixed as a whole by bolts. The upper end surface of the lower punch pad contacts the lower end surface of the lower punch, and the lower end surface of the lower punch positioning plate contacts the upper end surface of the height adjustment nut.

[0014] Preferably, the female mold is provided with an air blowing port, which is connected to an external air source.

[0015] Preferably, the present invention further discloses a method for punching annular carbon paper, using the aforementioned punching device, the punching method comprises the following steps: S1, stamping preparation, adjust the axes of the upper punch, lower punch, female die and inner core to be on the same axis; then preliminarily adjust the pressing thickness of the annular carbon paper: the first moving part drives the upper punch to move down into the stamping gap, the rotary rod of the press is placed at the lower limit, the height adjustment nut is rotated upward until it cannot be rotated, and then the height adjustment nut is rotated downward according to the thread pitch of the height adjustment rod, and the product of the number of rotations and the pitch is consistent with the thickness of the carbon paper after stamping; then perform a test punch to accurately adjust the pressing thickness of the annular carbon paper: put the carbon paper to be stamped in for a test punch, measure the thickness of the processed annular carbon paper, and fine-tune the height adjustment nut according to the measurement results to accurately control the thickness of the stamped carbon paper; finally adjust the blowing time: when the upper end of the lower punch is higher than the female die by moving up through the second moving part, the external air source is turned on and the air is discharged through the blowing port; S2, feeding, after completing the punching preparation, start the press, the first moving part and the second moving part of the press make periodic up and down movements, the first moving part drives the upper punch to move up, when it moves to the highest position, the external carbon paper feeding device is activated to place the carbon paper on the upper end surface of the female mold; S3, punching, the first moving part drives the upper punch to move downward until the upper punch contacts the carbon paper and starts punching, and then as the upper punch continues to move downward, the carbon paper is driven into the punching gap to complete the punching and forming of the circular carbon paper; S4, pressing thickness, when the first moving part drives the upper punch to the lowest position, the second moving part also moves to the lowest position, and the lower punch moves down along the inner hole of the female mold transition plate under the action of its own gravity, and is also at the lowest position. The distance between the upper punch and the lower punch is the thickness of the circular ring carbon paper to be pressed, thereby completing the pressing process of the circular ring carbon paper; S5, blowing the material from the mold, the first moving part drives the upper punch to move up, and the second moving part moves up to drive the lower punch to move up along the inner hole of the female mold transition plate. When the upper end of the lower punch is higher than the female mold, the external air source is opened and air is discharged through the blowing port to blow out the circular carbon paper.

[0016] S6. Repeat the above steps S2-S5 to complete the continuous punching of the ring-shaped carbon paper.

[0017] The beneficial effects of the present invention are: 1. The circular carbon paper is punched by setting the upper punch, the punching gap and the lower punch.

[0018] 2. The punching distance between the upper punch and the lower punch can be adjusted by the height adjustment rod and the height adjustment nut, and can be adjusted according to the different thicknesses of the required carbon paper, thereby improving the applicability of the equipment.

[0019] 3. There is an air blowing port on the female mold, which can blow away the carbon paper after stamping and collect it, which improves the automation performance of the equipment and the stamping efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front view of the present invention; Figure 2 for Figure 1 A partial enlarged view of FIG. Figure 3 for Figure 1 Partial enlarged view II.

[0021] The drawings are only used for illustrative purposes and should not be construed as limitations on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with the accompanying drawings. Example

[0023] like Figure 1 — Figure 3 As shown, a circular carbon paper punching device and a punching method thereof include a press 1, the press 1 having a workbench 2, a first movable part 18 located above the workbench 2, and a second movable part 17 located below the workbench 2, the second movable part 17 is connected to the main body of the press 1 through a rotary rod 3, and the press 1 is an existing equipment in the applicant's workshop, and will not be described in detail in this embodiment.

[0024] The bottom of the first moving part 18 is provided with an upper punch 4, the upper punch 6 is cylindrical, the upper part of the upper punch 6 has a flange, the upper punch plate 5 is provided with an opening matched with the flange, and the upper punch plate 5 and the upper punch 6 can be fixed on the upper punch 4 by bolts. A female die 9 is provided in the workbench 2, and the carbon paper to be punched is placed on the female die 9, and an inner core 10 is provided in the female die 9. A punching gap 20 is formed between the female die 9 and the inner core 10, and a lower punch 11 that can lift the carbon paper to be punched is placed in the punching gap 20. The first moving part 18 drives the upper punch 4, the upper punch plate 5 and the upper punch 6 provided thereon to move downward into the punching gap 20 and press the carbon paper to be punched onto the lower punch 11 to form a circular carbon paper 19.

[0025] A circular hole is opened in the workbench 2, and the female mold transition plate 14 is installed in the circular hole and fixed by the flange at its top. The female mold 9 is located inside the female mold transition plate 14, and a female mold pressing plate 8 is arranged above the female mold 9. The female mold pressing plate 8 crimps the female mold 9 into the female mold transition plate 14 by bolts.

[0026] The top of the lower punch 11 extends into the punching gap 20, and the side wall of the lower punch 11 is provided with a strip groove 101, through which the bolt passes to connect the female mold 9 and the inner core 10 as a whole. The width and height of the strip groove 101 are both greater than the thread diameter of the bolt to facilitate the passage of the bolt. Moreover, the device also sets the height of the strip groove 101 to be 8-15 times the thickness of the carbon paper to be punched, which can ensure that the lower punch 11 does not collide with the bolt when moving up and down. If the height of the strip groove 101 is too large, it will affect the strength of the lower punch 11. If the height of the strip groove 101 is too small, it is easy to collide with the bolt. In this embodiment, the height of the strip groove 101 is set to 10 times the thickness of the carbon paper to be punched.

[0027] The lower punch 11 is arranged on the second moving part 17, and the second moving part 17 is a push rod. When the second moving part 17 moves upward, it drives the lower punch 11 to move upward. When the second moving part 17 moves downward, the lower punch 11 moves downward under its own gravity, or moves downward under the downward pressure of the subsequent upper punch 6.

[0028] The upper end of the lower punch 11 is provided with a cylinder for accommodating the inner core 10, and the strip groove 101 is provided on the side wall of the cylinder. The depth of the cylinder is 1-2 times the height of the female mold. This setting can play a certain guiding role for the lower punch 11, limiting its shaking in the front and back and left and right directions, so that it always moves up and down along the outer diameter of the inner core 10. In this embodiment, the depth of the cylinder is set to 1.5 times the height of the female mold.

[0029] A height adjustment rod 16 is arranged above the second moving part 17. The height adjustment rod 16 is screwed to the second moving part 17 through the thread at the lower end thereof. The height adjustment rod 16 is screwed to the height adjustment nut 15 through the thread at the upper end thereof. The lower punch 11 is arranged on the height adjustment nut 15 through the lower punch pad 12 and the lower punch positioning plate 13. The lower punch pad 12 and the lower punch positioning plate 13 are fixed as a whole by bolts. The surface of the lower punch pad 12 is heat-treated and has a relatively hard hardness. The lower punch positioning plate 13 is made of ordinary steel. When the lower punch positioning plate 13 is deformed during repeated punching, the lower punch positioning plate 13 can be replaced. The upper end surface of the lower punch pad 12 contacts the lower end surface of the lower punch 11, and the lower end surface of the lower punch positioning plate 13 contacts the upper end surface of the height adjustment nut 15.

[0030] In order to prevent the height adjustment rod 16 from rotating during the stamping process, which would cause the distance between the upper punch 6 and the lower punch 11 to change, top screws for fixing the height adjustment rod 16 are provided through the side walls of the height adjustment nut 15 and the second movable portion 17 .

[0031] The female mold 9 is provided with a blowing port 7 connected to an external air source. The blowing port 7 forms an angle of 5° with the horizontal plane, and can smoothly blow away the annular carbon paper 19 pressed on the female mold 9 so as to punch the next carbon paper.

[0032] The present invention also discloses a method for punching annular carbon paper, using the aforementioned punching device, the punching method comprises the following steps: S1, stamping preparation, adjust the axes of the upper punch 6, the lower punch 11, the female die 9, and the inner core 10 to be on the same axis, that is, adjust the four to be concentric; then preliminarily adjust the pressing thickness of the annular carbon paper: the first moving part 18 drives the upper punch 6 to move downward into the stamping gap 20, the rotary rod 3 of the press 1 is placed at the lower limit (i.e., the lowest position), and the height adjustment nut 15 is rotated upward until it cannot be rotated, and then the height adjustment nut 15 is rotated downward according to the thread pitch of the height adjustment rod 16, and the product of the number of rotations and the thread pitch is consistent with the thickness of the carbon paper after stamping (due to error problems, it can be adjusted to be basically consistent); then test punching is performed to accurately adjust the pressing thickness of the annular carbon paper: the carbon paper to be stamped is placed for test punching, the thickness of the processed annular carbon paper is measured, and the height adjustment nut 15 is fine-tuned according to the measurement result to accurately control the thickness of the stamped carbon paper; in this embodiment, the thickness of the carbon paper is stamped from the original 1.2mm to 1.1mm. Finally, the blowing time is adjusted: when the upper end of the lower punch 11 is about 2 mm higher than the female mold by the upward movement of the second moving part 17, the external air source is opened and the air is discharged through the blowing port 7 to blow out the pressed carbon paper; S2, feeding, after the punching preparation is completed, the press machine 1 is started, the first moving part 18 and the second moving part 17 of the press machine 1 are periodically moved up and down, the first moving part 18 drives the upper punch 6 to move up, and when it moves to the highest position, the external carbon paper feeding device is activated to place the carbon paper on the upper end surface of the female mold 9; S3, punching, the first moving part 18 drives the upper punch 6 to move downward, and starts punching when the upper punch 6 contacts the carbon paper, cutting it into a circular ring shape, and then as the upper punch 6 continues to move downward, the carbon paper is driven into the punching gap 20, completing the punching and forming of the circular ring carbon paper 19; S4, pressing thickness. When the first moving part 18 drives the upper punch 6 to the lowest position, the second moving part 17 also moves to the lowest position. The lower punch 11 moves downward along the inner hole of the female mold transition plate 14 under the pressure of the upper punch 6 moving downward, and is also at the lowest position. The distance between the upper punch 6 and the lower punch 11 is the thickness of the annular carbon paper 19 required to be pressed, thereby completing the pressing process of the annular carbon paper; S5, blowing the material from the mold, the first moving part 18 drives the upper punch 6 to move upward, and the second moving part 17 moves upward to drive the lower punch 11 to move upward along the inner hole of the female mold transition plate 14. When the upper end of the lower punch 11 is about 2 mm higher than the female mold 9, the external air source is opened and air is discharged through the blowing port 7 to blow out the circular carbon paper.

[0033] S6. Repeat the above steps S2-S5 to complete the continuous punching of the ring-shaped carbon paper.

[0034] During the processing of this device, there are certain tolerance requirements. The parallelism error of the upper and lower end faces of the lower punch 11 must be controlled within 0.02mm, and the verticality error between the inner and outer diameters of the lower punch 11 and the end face must be controlled within 0.04mm; the gap between the annular inner and outer diameters of the lower punch 11 and the inner core 10 of the female mold is 0.02mm; the gap between the annular inner and outer diameters of the upper punch 6 and the inner core 10 of the female mold is 0.03mm; the gap between the outer diameter of the lower punch positioning plate 13 and the inner diameter of the female mold transition plate 14 is 0.05mm. In addition, the upper punch 6, lower punch 11, female mold 9, and inner core 10 of this application are all made of CrWMn material, and the hardness after heat treatment is above 56HRC; the upper punch pad 4 and the lower punch pad plate 12 are all made of 40Cr material, and the hardness after heat treatment is above 40HRC.

[0035] The above embodiments do not impose any formal limitations on the shape, material, structure, etc. of the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are within the protection scope of the technical solution of the present invention.

[0036] In the description of the present invention, it is necessary to understand that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection content of the present invention.

[0037] If the words "first", "second", etc. are used in this document to limit components, those skilled in the art should know that the use of "first" and "second" is only to facilitate the description of the present invention and simplify the description. Unless otherwise stated, the above words have no special meaning.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, but these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A ring-shaped carbon paper punching device, comprising a press, characterized in that: The press comprises a workbench and a first movable part located above the workbench, a cylindrical upper punch is arranged on the first movable part, a female mold is arranged in the workbench, the carbon paper to be punched is placed on the female mold, an inner core is arranged in the female mold, a punching gap is formed between the female mold and the inner core, a lower punch which can lift the carbon paper to be punched is placed in the punching gap, the first movable part drives the upper punch to move downward into the punching gap and presses the carbon paper to be punched onto the lower punch to form a circular ring-shaped carbon paper.

2. A ring-shaped carbon paper punching device according to claim 1, characterized in that: A female die transition plate is arranged in the workbench, the female die is located inside the female die transition plate, the female die is connected to the inner core by bolts, the top of the lower punch extends into the stamping gap, and the side wall of the lower punch is provided with a strip groove for the bolts to pass through.

3. The ring-shaped carbon paper punching device according to claim 2, characterized in that: The height of the strip groove is 8-15 times the thickness of the carbon paper to be punched.

4. The ring-shaped carbon paper punching device according to claim 2, characterized in that: The press machine also has a second moving part located below the workbench, and the lower punch is arranged on the second moving part and can move up and down with the movement of the second moving part.

5. The ring-shaped carbon paper punching device according to claim 4, characterized in that: The upper end of the lower punch is provided with a cylinder for accommodating the inner core, the strip groove is opened on the side wall of the cylinder, and the depth of the cylinder is 1-2 times the height of the female mold.

6. The ring-shaped carbon paper punching device according to claim 2, characterized in that: A height adjustment rod is arranged above the second moving part. The height adjustment rod is screwed to a height adjustment nut through a thread at the upper end thereof. The lower punch is arranged on the height adjustment nut.

7. The ring-shaped carbon paper punching device according to claim 6, characterized in that: A top screw for fixing the height adjustment rod is passed through the side wall of the height adjustment nut.

8. The ring-shaped carbon paper punching device according to claim 6, characterized in that: A lower punch pad and a lower punch positioning plate are also arranged between the lower punch and the height adjustment nut. The lower punch pad and the lower punch positioning plate are fixed as a whole by bolts. The upper end surface of the lower punch pad contacts the lower end surface of the lower punch, and the lower end surface of the lower punch positioning plate contacts the upper end surface of the height adjustment nut.

9. The ring-shaped carbon paper punching device according to claim 1, characterized in that: The female mold is provided with an air blowing port, which is connected to an external air source.

10. A method for punching a ring-shaped carbon paper, characterized in that: Using the punching device according to claims 1 to 9, the punching method comprises the following steps: S1, stamping preparation, adjust the axes of the upper punch, lower punch, female die and inner core to be on the same axis; then preliminarily adjust the pressing thickness of the annular carbon paper: the first moving part drives the upper punch to move down into the stamping gap, the rotary rod of the press is placed at the lower limit, the height adjustment nut is rotated upward until it cannot be rotated, and then the height adjustment nut is rotated downward according to the thread pitch of the height adjustment rod, and the product of the number of rotations and the pitch is consistent with the thickness of the carbon paper after stamping; then perform a test punch to accurately adjust the pressing thickness of the annular carbon paper: put the carbon paper to be stamped in for a test punch, measure the thickness of the processed annular carbon paper, and fine-tune the height adjustment nut according to the measurement results to accurately control the thickness of the stamped carbon paper; finally adjust the blowing time: when the upper end of the lower punch is higher than the female die by moving up through the second moving part, the external air source is turned on and the air is discharged through the blowing port; S2, feeding, after completing the punching preparation, start the press, the first moving part and the second moving part of the press make periodic up and down movements, the first moving part drives the upper punch to move up, when it moves to the highest position, the external carbon paper feeding device is activated to place the carbon paper on the upper end surface of the female mold; S3, punching, the first moving part drives the upper punch to move downward until the upper punch contacts the carbon paper and starts punching, and then as the upper punch continues to move downward, the carbon paper is driven into the punching gap to complete the punching and forming of the circular carbon paper; S4, pressing thickness, when the first moving part drives the upper punch to the lowest position, the second moving part also moves to the lowest position, and the lower punch moves down along the inner hole of the female mold transition plate under the action of its own gravity, and is also at the lowest position. The distance between the upper punch and the lower punch is the thickness of the circular ring carbon paper to be pressed, thereby completing the pressing process of the circular ring carbon paper; S5, blowing the material from the mold, the first moving part drives the upper punch to move upward, and the second moving part moves upward to drive the lower punch to move upward along the inner hole of the female mold transition plate. When the upper end of the lower punch is higher than the female mold, the external air source is turned on and the air is discharged through the blowing port to blow out the annular carbon paper; S6. Repeat the above steps S2-S5 to complete the continuous punching of the ring-shaped carbon paper.

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