Belt pulley stamping die

Abstract

The utility model relates to a belt pulley stamping die. The belt pulley stamping die comprises an upper die mechanism, a lower die base, a stripping mechanism and a punch. The upper die mechanism comprises an upper die base, a lower base plate and an upper clamping plate from top to bottom, and the upper base plate is arranged on the lower portion of the upper die base and connected with the upper clamping plate on the lower portion through bolts. A lower die holder is arranged below the upper die mechanism correspondingly; a stripping mechanism is arranged between the lower part of the upper clamping plate of the upper die holder and the upper part of the lower die holder; the stripping mechanism is connected with the upper die mechanism through a bolt; the upper end of the punch is fixedly connected to an upper clamping plate of the upper die mechanism, a hole for the punch to penetrate through is formed in the stripping mechanism, and the lower end of the punch penetrates through the stripping mechanism and extends into a workpiece on the lower die base. The factor that the workpiece is limited and the circle center needs to be determined through a lower die when a traditional product is stamped through the lower die is changed; through the stripping mechanism arranged in the upper die, the workpiece is positioned on the upper die, precise stamping of a stamping groove of the workpiece is achieved, and the stamping work efficiency of the belt pulley is improved.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, specifically to a belt pulley stamping mold. Background Technology

[0002] In existing pulley stamping dies, the conventional method involves fixing the product to the lower die, placing the workpiece in a groove on the lower die, clamping the workpiece with a fixture, and then stamping it through the punch of the upper die. After stamping, the punch leaves the die, and the clamping force needs to be released before the workpiece can be removed. This stamping method requires the product to be limited and centered on the lower die to achieve precise workpiece slot placement. This method relies on lower die positioning, resulting in low processing efficiency. Utility Model Content

[0003] In view of the defects of the prior art, the purpose of this utility model is to provide a belt pulley stamping die. The structure of this die changes the traditional method of positioning the lower die of the product. By adopting the upper die positioning method of the workpiece, the grooving is realized, which is convenient to operate and improves the stamping efficiency.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a belt pulley stamping die, comprising: an upper die mechanism, a lower die base, a stripping mechanism, a punch, and several bolts; the upper die mechanism includes, from top to bottom, an upper die base, a lower pad, and an upper clamping plate, the lower part of the upper die base being the upper pad, and the upper pad and the upper clamping plate below it being connected together by bolts; a lower die base is provided below the upper die mechanism; a stripping mechanism is provided between the lower part of the upper clamping plate of the upper die base and the upper part of the lower die base; the stripping mechanism is connected to the upper die mechanism by bolts; the upper end of the punch is fixedly connected to the upper clamping plate of the upper die mechanism, and the stripping mechanism is provided with a hole for the punch to pass through, the lower end of the punch passing through the stripping mechanism and extending into the workpiece placed on the lower die base;

[0005] Furthermore, a gap is provided between the lower surface of the upper clamping plate of the upper mold mechanism and the upper surface of the stripping plate of the stripping mechanism;

[0006] Furthermore, the lower end of the punch is a free end, and the free end of the punch passes through the stripping mechanism and is in a sleeved fit with the stripping mechanism.

[0007] Furthermore, the stripping mechanism includes: a stripping plate, an inner support located at the lower part of the stripping plate, and several screws;

[0008] The inner support has a "double T" shaped cross section, including a top disc and a support rod integrally connected to the bottom of the disc;

[0009] The stripper plate and inner support are provided with corresponding holes that match the shape of the punch; in use, the lower end of the punch passes through the corresponding holes on the stripper plate and inner support in sequence, and extends into the workpiece through the support rod of the inner support.

[0010] Furthermore, a number of screw holes are provided circumferentially on the top disc of the inner tray, and matching screw holes are also provided on the stripper plate at positions corresponding to the screw holes of the inner tray. The inner tray is fixedly connected to the stripper plate by screws.

[0011] Furthermore, the upper mold mechanism has a guide post at each of the four corners of the upper clamping plate, and the lower mold base has four guide sleeves that match the four guide posts.

[0012] Furthermore, the lower part of the upper die base of the upper die mechanism is also provided with a limiting block to prevent the punch from pressing too much.

[0013] The stamping principle of the above stamping die is as follows: the stamping mechanism applies downward force to the upper die mechanism, the upper die base moves downward, and at the same time, together with the upper pad and the upper clamping plate, it approaches the stripper plate. The distance between the upper clamping plate and the stripper plate gradually disappears, and it continues to press downward, so that the inner support at the bottom of the stripper plate is pressed into the workpiece. The inner support contacts the workpiece first to form a positioning. At the same time, the punch passes through the hole corresponding to the punch in the stripper plate and performs a grooving operation on the workpiece. The workpiece is stamped out of the grooving groove.

[0014] After the workpiece is stamped, the upper die mechanism retracts upwards. At the beginning of the retraction, the stripper plate and inner support do not move and are still pressed on the workpiece. As the upper die mechanism continues to retract upwards, the upper die base, upper pad, upper clamping plate, and punch move upwards synchronously, gradually restoring the original distance between the upper clamping plate and the stripper plate. Then, the upper die mechanism continues to move upwards. Due to the bolts that connect the upper pad, upper clamping plate, and stripper plate, the upper die base, upper pad, upper clamping plate, punch, stripper plate, and inner support move upwards together, thus leaving the workpiece. The stamped workpiece is left on the lower die base and then directly removed to prepare for the next workpiece to be stamped.

[0015] The beneficial effects of using this solution for belt pulley stamping dies are:

[0016] The product uses an upper die for positioning to stamp the workpiece groove, which changes the traditional lower die stamping method that requires considering the limiting and centering of the workpiece in the lower die. The workpiece positioning is completed on the upper die through the stripping mechanism set in the upper die, so as to achieve precise stamping of the workpiece groove and improve the efficiency of belt pulley stamping. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the assembly structure of the stamping die of this utility model.

[0018] Figure 2 for Figure 1 A diagram showing the state of a stamping die during the stamping process (the punch striking the workpiece).

[0019] Figure 3 for Figure 1 A diagram showing the unloading state of the stamping die after stamping (the punch leaves the workpiece).

[0020] Figure 4 for Figure 1 The upper mold base structure diagram.

[0021] Figure 5 for Figure 1 The upper pad structure diagram.

[0022] Figure 6 for Figure 1 The upper clamping plate structure diagram.

[0023] Figure 7 for Figure 1 The structure diagram of the stripper plate.

[0024] Figure 8 for Figure 1 Diagram of the inner support structure.

[0025] Figure 9 for Figure 8 Side view.

[0026] Figure 10 for Figure 1 The structure diagram of the punch.

[0027] Figure 11 for Figure 10 Side view.

[0028] Figure 12 This is a schematic diagram showing the fit between the inner support and the workpiece.

[0029] Figure 13 for Figure 1 The lower mold base structure diagram.

[0030] Figure 14 This is a structural diagram illustrating the cooperation between the lower mold mechanism and the workpiece in one embodiment of the present invention.

[0031] Figure 15 This is a structural diagram of the top cover plate.

[0032] Figure 16 The template structure diagram is shown below.

[0033] Figure 17 This is a structural diagram of the lower pad.

[0034] Figure 18 This is a structural diagram of the lower cover plate.

[0035] Figure 19 This is a drawing of a stamped product made using the stamping die of this utility model.

[0036] Figure 20 for Figure 19 Cross-sectional view.

[0037] In the figure, 1. Lower die base, 2. Punch, 3. Upper die base, 4. Upper backing plate, 5. Upper clamping plate, 6. Bolt, 7. Hole for punch to pass through, 8. Workpiece, 9. Stripper plate, C1-C8, Screw holes of stripper plate, 10. Inner support, 101. Top disc, 102. Support rod, 103. Screw holes of inner support, 11. Guide post, 12. Stamping groove. Detailed Implementation

[0038] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0039] like Figure 1-16 The pulley stamping die shown includes: an upper die mechanism, a lower die base 1, a stripping mechanism, a punch 2, and several bolts; the upper die mechanism includes, from top to bottom, an upper die base 3, an upper pad 4, and an upper clamping plate 5, with the upper die base 3 having the upper pad 4 at its lower part, and the upper pad 4 being connected to the upper clamping plate 5 below it by bolts 6; the lower die base 1 is provided below the upper die mechanism; a stripping mechanism is provided between the lower part of the upper clamping plate 5 of the upper die base 3 and the upper part of the lower die base 1; the stripping mechanism is connected to the upper die mechanism by bolts; the upper end of the punch 2 is fixedly connected to the upper clamping plate 5 of the upper die mechanism, and the stripping mechanism is provided with a hole 7 for the punch to pass through, the lower end of the punch 2 passing through the stripping mechanism and extending into the workpiece 8 placed on the lower die base 1;

[0040] Furthermore, a gap is provided between the lower surface of the upper clamping plate 5 of the upper mold mechanism and the upper surface of the stripping plate 9 of the stripping mechanism;

[0041] Specifically, there is a 17mm gap between the upper clamping plate 5 and the stripping plate 9;

[0042] Furthermore, the lower end of the punch 2 is a free end, and the free end of the punch 2 passes through the stripping mechanism and is in a sleeved fit with the stripping mechanism.

[0043] Furthermore, the stripping mechanism includes: a stripping plate 9, an inner support 10 located at the lower part of the stripping plate 9, and several screws;

[0044] The inner support 10 has a "double T" shaped cross section, including a top disc 101 and a support rod 102 integrally connected to the bottom of the disc 101;

[0045] The stripper plate 9 and the inner support 10 are provided with corresponding holes that match the shape of the punch 2; the corresponding holes are holes 7 for the punch to pass through; in use, the lower end of the punch 2 passes through the corresponding holes 7 for the punch to pass through on the stripper plate 9 and the inner support 10 in sequence, and extends into the workpiece 8 through the support rod 102 of the inner support 10.

[0046] Furthermore, a number of screw holes 103 are provided circumferentially on the top disc 101 of the inner support 10, and matching screw holes C1-C8 are also provided on the stripping plate 9 at positions corresponding to the screw holes 103 of the inner support 10. The inner support 10 is fixedly connected to the stripping plate 9 by screws.

[0047] Furthermore, the upper clamping plate 5 of the upper mold mechanism is provided with a guide post 11 at each of the four corners, and the guide post 11 has a specification of Φ25*160mm; the lower mold base 1 is provided with four guide sleeves that match the four guide posts 11, and the guide post 11 is provided with a ball sleeve and a spring. The spring sleeve is fitted on the guide post 11, and the ball sleeve is fitted on the lower end of the guide post 11.

[0048] Furthermore, the upper die base 3 of the upper die mechanism is also provided with a limiting block at the lower part to prevent the punch 2 from punching excessively.

[0049] Based on the above-described stamping die, the upper die mechanism is further provided with an upper cover plate made of 45# steel; the lower die base 1 is further provided with a lower template, a lower pad, and a lower cover plate, thereby forming a lower die mechanism; wherein, the lower template and the lower pad are made of CR12MOV HRC58-60, and the lower cover plate is made of SS41; based on the above-described solution, the connection of the mentioned components can be achieved using common common sense connection methods.

[0050] The stamping principle of the above-mentioned stamping die is as follows: the stamping mechanism applies downward force to the upper die mechanism, the upper die base 3 moves downward, and at the same time, together with the upper pad 4 and the upper clamping plate 5, it approaches the stripper plate 9. The distance between the upper clamping plate 5 and the stripper plate 9 gradually decreases, and it continues to press downward, so that the inner support 10 at the bottom of the stripper plate 9 is pressed into the workpiece 8, allowing the inner support to contact the workpiece first and form a positioning. At the same time, the punch 2 passes through the hole corresponding to the punch 2 in the stripper plate 9 and performs a grooving operation on the workpiece 8. The workpiece 8 is stamped into a shape with a groove. Figure 19 The stamping groove 12 is shown in the shape;

[0051] After workpiece 8 is stamped, the upper die mechanism retracts upward. At the beginning of the retraction, the stripper plate 9 and inner support 10 do not move and are still pressed on workpiece 8. As the upper die mechanism continues to retract upward, the upper die base 3, upper pad 4, upper clamping plate 5 and punch 2 move upward synchronously, gradually restoring the original distance between the upper clamping plate 5 and the stripper plate 9. Then the upper die mechanism continues to move upward. Due to the bolt 6 that connects the upper pad 4, upper clamping plate 5 and stripper plate 9, the upper die base 3, upper pad 4, upper clamping plate 5, punch 2, stripper plate 9 and inner support 10 move upward together, thus leaving workpiece 8. The stamped workpiece 8 is left on the lower die base 1 and then directly removed to prepare for the next workpiece to be stamped.

[0052] During the stamping process described above, when the punch 2 presses downwards, the inner support 10 first contacts the workpiece 8 and then continues to press downwards. At this time, the inner support 10 has formed a support, and the stripper plate 9 is also supported. Therefore, with both the stripper plate 9 and the inner support 10 fixed, the punch 2 of the upper die mechanism completes the downward stamping. Thus, the inner support 10 plays a positioning role here. As long as the inner support 10 can enter the workpiece 8, it means that the position of the workpiece 8 is correct.

[0053] Based on the above technical solution, the core of this solution is that the inner support 10 of the stripping mechanism is a component of the upper die mechanism, while the lower die mechanism only requires manual placement of the workpiece 8 directly onto the lower die, without the need for precise alignment and positioning; when the inner support 10 of the stripping mechanism in the upper die mechanism moves downward, it can naturally center itself, using the inner support 10 to determine the circle; and after centering, the inner support 10 can press down on the workpiece 8 to prevent the workpiece 8 from tilting up; at the same time, when the punch retracts to remove the material, due to the positioning of the stripping plate 9 and the inner support 10, the stripping plate 9 and the inner support 10 press down on the workpiece 8, making it easier for the punch 2 to exit.

[0054] The upper end of the upper mold base is provided with a groove that matches the lower edge of the workpiece, and the workpiece is embedded in the groove;

[0055] In the above process, the stamping method of the punch of the upper die mechanism is achieved through common knowledge.

[0056] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0057] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0058] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0059] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0060] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

Claims

1. A pulley press die characterized by, The utility model relates to a punch mechanism, and particularly relates to a punch mechanism with a built-in stripper. The upper die mechanism comprises, from top to bottom, an upper die base, a lower base plate and an upper clamping plate, the lower part of the upper die base is the upper base plate, and the upper base plate and the upper clamping plate at the lower part thereof are connected together through bolts; a lower die base is arranged below the upper die mechanism in correspondence with the upper die mechanism; a stripper is arranged between the lower part of the upper clamping plate of the upper die base and the upper part of the lower die base; the stripper is connected together with the upper die mechanism through bolts; the upper end of the punch is fixedly connected to the upper clamping plate of the upper die mechanism, the stripper is provided with a hole for the punch to pass through, and the lower end of the punch passes through the stripper and extends into a workpiece placed on the lower die base.

2. A pulley press die according to claim 1, wherein: The upper clamping plate of the upper die mechanism and the stripper plate of the stripper are arranged with a gap between the lower surface of the upper clamping plate and the upper surface of the stripper plate.

3. A pulley stamping die according to claim 2, wherein: The upper clamping plate and the stripper plate are arranged with a spacing of 17 mm therebetween.

4. The pulley press die of claim 1, wherein: The lower end of the punch is a free end, the free end of the punch is arranged in the stripper and is in a sleeved connection relationship with the stripper.

5. The pulley press die of claim 1, wherein: The stripper comprises a stripper plate and an inner support at the lower part of the stripper plate and a plurality of bolts; the inner support has a "double T" shaped structure in cross section and comprises a top disc and a support rod integrally connected to the bottom of the disc; the stripper plate and the inner support are provided with holes corresponding to the shape of the punch for the punch to pass through; the lower end of the punch passes through the holes corresponding to the punch in the stripper plate and the inner support in sequence and extends into the workpiece through the support rod of the inner support.

6. A pulley press die according to claim 5 wherein: A plurality of bolt holes are arranged circumferentially on the top disc of the inner support, the stripper plate is also provided with matching bolt holes at positions corresponding to the bolt holes of the inner support, and the inner support is fixedly connected to the stripper plate through the bolts.

7. A pulley stamping die according to claim 1, wherein: The upper clamping plate of the upper die mechanism is provided with a guide column at each of the four corners, and the lower die base is provided with four guide sleeves corresponding to the four guide columns.

8. The pulley press die of claim 1, wherein: The lower part of the upper die base of the upper die mechanism is further provided with a limiting block.

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