Blanking device to eliminate shrinkage deviation

Abstract

The utility model discloses a blanking device for eliminating shrinkage deviation, and relates to the technical field of die-casting production; it comprises an upper template, wherein the upper template is provided with a plurality of pin holes according to the punching position of the die-casting, the upper part of the punching pin is located in the corresponding pin hole, and there is a positioning gap A between the inner wall of the pin hole and the punching pin, and a draft angle is provided at the head of each punching pin, and the draft angle plays a guiding role when the punching pin contacts the die-casting, and the punching pin is automatically aligned along the head pin wall when punching. Through the swing of the punching pin and the guiding role of the head draft angle, the device can accurately complete the punching action and ensure that there is no residue on the edge of the die-casting hole. By eliminating shrinkage deviation and ensuring the accuracy of the punching position, the residue on the edge of the die-casting hole is reduced, and the overall quality of the product is improved. It also reduces the need for subsequent processing and manual correction, and reduces production costs; the automatic guiding and alignment mechanism speeds up the punching process and improves production efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of die casting production, in particular to a blanking device for eliminating shrinkage deviation. Background Art

[0002] In the current die-casting production process, the application of blanking die is already quite common. Its working principle is based on the relative movement of the upper die and the lower die, which accurately separates the die-casting product from the runner, slag, burrs, etc., so as to obtain a complete and high-quality product. This type of mold is not only simple in design, but also easy to operate, and has become a common tool in the die-casting industry.

[0003] However, to meet the high precision requirements of die castings, key factors such as shrinkage must be fully considered. The volume reduction ratio of die castings during solidification is deeply affected by many factors such as material physical properties, shape and size. In actual production, due to differences in shape and wall thickness, the shrinkage of different parts of die castings may be different. In particular, the punching process has a significant impact on the subsequent blanking effect.

[0004] In the design stage of the blanking die, although it is made based on theoretical data, due to many variables in actual production, there is often a deviation between the position of the punching pin and the die casting hole. This will cause one side to be over-punched and damaged during the punching process, while the other side will not be punched enough, leaving burrs, thus causing batch defective products. In order to solve these problems, manual corrections have to be relied on later, which undoubtedly increases production costs and reduces production efficiency. Utility Model Content

[0005] The purpose of the utility model is to provide a blanking device for eliminating shrinkage deviation, which has the advantages of simple structure, convenient operation, and precise punching. It can effectively solve the positioning problem encountered in radial punching of die castings and improve product quality and production efficiency.

[0006] To achieve the above-mentioned purpose, the present application proposes a blanking device for eliminating shrinkage deviation, including an upper template, wherein the upper template is provided with a plurality of pin holes according to the punching positions of the die-casting, the upper part of the punching pin is located in the corresponding pin hole, and there is a positioning gap A between the inner wall of the pin hole and the punching pin, and a draft angle is provided at the head of each punching pin. When the punching pin contacts the die-casting, the draft angle plays a guiding role, and the punching pin is automatically aligned along the pin wall of the head during punching.

[0007] Furthermore, a plurality of top screws and gaskets are embedded in the upper template, and the top screws are locked on the corresponding punching pins to prevent them from retreating.

[0008] Furthermore, the die casting is located on the cutting edge pad during punching, and a product-shaped groove is provided on the top of the cutting edge pad for accurate positioning.

[0009] Furthermore, the upper template is connected to the cutting edge plate through a pad, and when the upper template moves downward, the cutting edge plate presses on the material handle and the slag bag.

[0010] Furthermore, the upper template is movably connected to the return block via a plurality of limit bolts, and a spring is provided between the return block and the upper template.

[0011] Furthermore, a through hole is formed on the return block for the punching pin to pass through, and an avoidance gap B exists between the inner wall of the through hole and the punching pin, and the size of the avoidance gap B is larger than the size of the positioning gap A.

[0012] Furthermore, a material recovery guide groove is provided on one side of the cutting edge pad.

[0013] Furthermore, the cutting edge pad is installed on the lower template through a positioning plate.

[0014] Furthermore, the lower mold plate is placed on the bottom plate through mold legs.

[0015] The above technical solution adopted by the utility model has the advantages over the prior art that: the device does not rely on the precise positioning of the punching pin; on the contrary, it uses the alignment clearance of the punching pin to achieve adaptive adjustment; when the punching pin contacts the die casting, its alignment clearance allows the punching pin to be fine-tuned according to the actual position and shape of the die casting to ensure the accuracy of the punching position. A draft angle that matches the swing range is specially designed at the head of the punching pin. When the punching pin contacts the die casting, this draft angle will play a guiding role, helping the punching pin to quickly and accurately find the correct punching position.

[0016] Through the swing of the punch pin and the guiding effect of the head draft angle, this device can accurately complete the punching action to ensure that there is no residue on the edge of the die casting hole. By eliminating shrinkage deviation and ensuring the accuracy of the punching position, the residue on the edge of the die casting hole is reduced, and the overall quality of the product is improved. It also reduces the need for subsequent processing and manual correction, reducing production costs. The automatic guiding and alignment mechanism speeds up the punching process and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Cross-sectional view of blanking device to eliminate shrinkage deviation;

[0018] Figure 2 A partial enlarged view of the blanking device to eliminate shrinkage deviation;

[0019] Figure 3 Main view of blanking device to eliminate shrinkage deviation;

[0020] Figure 4 Side view of blanking device to eliminate shrinkage deviation;

[0021] Among them: 1. top screw, 2. upper template, 3. punching pin, 4. die casting, 5. cutting edge pad, 6. spring, 7. bolt, 8. pad, 9. return block, 10. cutting edge plate, 11. material handle recovery guide groove, 12. positioning plate, 13. lower template, 14. mold leg, 15. bottom plate, 16. material handle. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0023] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" means two or more, unless otherwise clearly and specifically defined. "Several" means one or more, unless otherwise clearly and specifically defined.

[0025] In the description of the present application, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0026] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] See also Figure 1-4 The present embodiment provides a blanking device for eliminating shrinkage deviation, including an upper template, wherein the upper template is provided with a plurality of pin holes according to the punching positions of the die-casting, the upper part of the punching pin is located in the corresponding pin hole, and a positioning gap A exists between the inner wall of the pin hole and the punching pin, and a plurality of top screws and gaskets are embedded in the upper template, and the top screws are locked on the corresponding punching pin to prevent it from retreating; a draft angle is provided on the head of each punching pin, and the draft angle plays a guiding role when the punching pin contacts the die-casting, and the punching pin is automatically aligned along the pin wall of the head during punching; the die-casting is located on the cutting edge pad, and a product-shaped groove is provided on the top of the cutting edge pad for accurate positioning; the upper template is connected to the cutting edge plate through a pad, and when the upper template moves downward, the cutting edge plate presses on the material handle and the slag bag.

[0028] In this embodiment, the upper template is movably connected to the return block through a plurality of limit bolts, and a spring is provided between the return block and the upper template. The return block is provided with a through hole for the punching pin to pass through, and there is a clearance gap B between the inner wall of the through hole and the punching pin, and the size of the clearance gap B is larger than the size of the positioning gap A.

[0029] When the punching pin moves downward to touch the side wall of the die-casting hole, there is a positioning gap A and an avoidance gap B on the positioning side wall of the punching pin, and there is a draft angle β on the head of the punching pin (the values ​​of A, B and β are adjusted according to actual conditions). The punching pin will swing to a certain extent and will automatically align along the pin wall during the punching process of the die-casting to achieve the purpose of accurate stamping.

[0030] In the present application, the upper mold plate, return block, spring, bolt, pad, and cutting edge plate belong to the upper mold part. The cutting edge pad, positioning plate, lower mold plate, mold leg, bottom plate, and material handle recovery guide groove belong to the lower mold part. When the upper mold moves downward, the return block first contacts the die casting, pressing the die casting on the cutting edge pad to prevent it from moving; the cutting edge plate presses on the material handle and the slag bag, and the cutting edge pad supports the die casting to force it not to move downward. When the mold is closed to a certain extent, the material handle and the slag bag are separated from the die casting to achieve the purpose of trimming. When the mold is opened, the spring changes from a compressed state to a stretched state, giving a downward force to the return block, pushing the die casting out of the cutting edge plate and leaving it in the lower mold for easy collection and removal. The material handle flows from the material handle recovery guide groove to the same position for unified recycling and processing, saving labor and time costs.

[0031] The effect of this embodiment is that when meeting the radial punching requirements of multiple places of the product, in order to ensure the punching accuracy and efficiency, the shrinkage deviation needs to be obtained in advance. In order to avoid the cumbersome and precise positioning of the punching pin, an innovative approach is adopted: setting the alignment gap on the upper template and the return block and setting the draft angle on the head of each punching pin, so as to allow the punching pin to swing within a controllable range, and provide a reasonable swing range for the punching pin, thereby effectively absorbing and compensating for the shrinkage deviation caused by factors such as materials, processes or equipment. In this way, even if there are slight deviations in the punching process, it can be automatically adjusted through the flexible swing of the punching pin to ensure the accuracy of the punching position and the stability of the punching quality, greatly reducing the secondary processing and repair requirements of the die casting. This improvement not only significantly improves the yield rate of the product, but also effectively saves time and labor costs, bringing a double improvement to the production efficiency and economic benefits of the enterprise.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application 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. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A blanking device for eliminating shrinkage deviation, comprising an upper template, wherein the upper template is provided with a plurality of pin holes according to the punching positions of the die casting, and the upper part of the punching pin is located in the corresponding pin hole, characterized in that: There is a positioning gap A between the inner wall of the pin hole and the punching pin. A draft angle is provided on the head of each punching pin. The draft angle plays a guiding role when the punching pin contacts the die casting. When punching, the punching pin is automatically aligned along the head pin wall.

2. The device for eliminating shrinkage deviation according to claim 1, characterized in that: A plurality of top screws and gaskets are embedded in the upper template, and the top screws are locked on the corresponding punching pins to prevent them from retreating.

3. The device for eliminating shrinkage deviation according to claim 1, characterized in that: When punching, the die casting is located on the cutting edge pad, and a product-shaped groove is opened on the top of the cutting edge pad for accurate positioning.

4. The device for eliminating shrinkage deviation according to claim 1, characterized in that: The upper template is connected to the cutting edge plate through a pad. When the upper template moves downward, the cutting edge plate presses on the material handle and the slag bag.

5. The device for eliminating shrinkage deviation according to claim 1, characterized in that: The upper template is movably connected to the return block through a plurality of limit bolts, and a spring is arranged between the return block and the upper template.

6. The device for eliminating shrinkage deviation and blanking according to claim 5, characterized in that: The return block is provided with a through hole for the punching pin to pass through, and there is an avoidance gap B between the inner wall of the through hole and the punching pin, and the size of the avoidance gap B is greater than the size of the positioning gap A.

7. The device for eliminating shrinkage deviation according to claim 3, characterized in that: A material recovery guide groove is provided on one side of the cutting edge pad.

8. The device for eliminating shrinkage deviation according to claim 3, characterized in that: The cutting edge pad is mounted on the lower template via a positioning plate.

9. The device for eliminating shrinkage deviation blanking according to claim 8, characterized in that: The lower mold plate is placed on the bottom plate through mold legs.

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