Composite forging and pressing die for heat dissipation cover

Abstract

A heat dissipation cover composite forging and pressing die relates to the technical field of forming dies and comprises an upper die forming cutter and a lower die gear ring pressing edge which are arranged in parallel from top to bottom. The upper die forming cutter and the lower die gear ring pressing edge are provided with a positioning structure for positioning a material belt firstly, a shearing structure for shearing the material and a forming structure for forming finally. The problems that in the traditional technology, a continuous punching technology greatly wastes raw materials, and a single-process engineering mold is adopted, so that the forming aging is low, the productivity is insufficient and the labor ratio is high are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of forming dies, and particularly to a composite forging die for a heat dissipation cover. Background Art

[0002] The base material of the heat dissipation cover in IC packaging is generally pure copper, with a relatively high manufacturing cost. The traditional continuous forming die technology can only achieve a maximum raw material utilization rate of about 40%, resulting in a great waste of raw materials. This is not only a waste of cost but also a waste of copper resources. Moreover, traditional forging dies are all single-process engineering dies, with low forming efficiency, insufficient production capacity, and a high proportion of manual labor.

[0003] A patent with a publication number of CN220426529U is disclosed in the prior art. The solution includes a stripping plate and a lower template arranged in parallel from top to bottom, and a heat sink forming area between the stripping plate and the lower template, which solves the problem of reducing the stamping forming efficiency of heat sinks in the traditional technology.

[0004] As the device is used in production, the deficiencies of this technology gradually emerge, mainly manifested in the following aspects: First, the traditional forming is continuous stamping forming. Due to the need for pre-punching positioning, establishing laces, and ensuring the strength of die parts, the width of the material is passively widened and the feeding pitch is passively lengthened. Therefore, the material utilization rate is low, and the material utilization rate of materials with a size below 30 mm is less than 50%.

[0005] Second, the thickness of the materials used for the products formed by continuous stamping is generally above 2.0 mm, and a large forming force is required for pressing. The traditional continuous stamping forming uses a stamping machine for forming. The stamping machine belongs to inertial force and cannot continuously apply pressure, and it is also easy to have a situation of insufficient tonnage. For example, the larger and thicker the product, the more obvious the situation of insufficient tonnage, which also leads to unstable product quality. For example, the flatness, cavity depth, etc. cannot be stably and continuously produced; and continuous stamping belongs to progressive multi-step forming, and the internal and external dimensions are prone to deviation, so the tolerance zone requirements are relaxed, resulting in customer dissatisfaction.

[0006] Third, the traditional forging die forming is generally divided into multiple processes such as blanking, forging, rough cutting, forging, and finish cutting, which are carried out separately at different stations and are non-continuous production. Blanking requires 1 stamping machine and 1 employee; forging requires 1 - 3 machines and 1 - 3 employees; rough cutting and finish cutting each require 1 machine and 1 employee, significantly occupying machine and human resources. In case of tight machine availability, it will lead to difficult production scheduling, low efficiency, long production cycle, and seriously delay order delivery.

[0007] In summary, it is obvious that the prior art has inconveniences and defects in actual use, so it is necessary to make improvements. Summary of the Invention

[0008] In view of the defects in the prior art, the present invention provides a composite forging die for a heat sink cover to solve the problems of great waste of raw materials in continuous stamping technology in traditional technology, and all of them are single-process engineering molds, with low molding time, insufficient production capacity and high labor ratio.

[0009] To achieve the above object, the present invention provides the following technical solutions: The composite forging die for a heat dissipation cover comprises an upper die forming knife and a lower die gear ring pressing edge arranged in parallel from top to bottom; the upper die forming knife and the lower die gear ring pressing edge are provided with a positioning structure for first positioning the material strip, then a shearing structure for shearing the material, and finally a forming structure for forming.

[0010] As an optimized solution, the shearing structure includes a lower die forming punch which is vertically lifted and lowered in the pressure edge of the lower die gear ring, and a cutting hole matching the lower die forming punch is provided in the upper die forming knife.

[0011] As an optimized solution, the forming structure includes an upper die forming spring top vertically slidably arranged in the cutting hole, an upper die forming punch vertically raised and lowered in the upper die forming spring top, and the upper surface forming surface of the product is formed by the height difference between the upper die forming punch and the lower surface of the upper die forming spring top.

[0012] As an optimized solution, the molding structure includes a molding surface on the lower surface of the product opened at the upper end of the lower die molding punch.

[0013] As an optimized solution, the positioning structure includes a positioning piercing strip arranged around the outer edge of the molding surface on the lower surface of the product.

[0014] As an optimized solution, the lower die gear ring pressure edge is fixed on the lower stripping plate, and guide plates are respectively fixed on both ends of the lower stripping plate.

[0015] As an optimized solution, the lower stripping plate is mounted on the lower die base assembly by vertical sliding via a discharge spring assembly.

[0016] As an optimized solution, the lower end of the lower die forming punch is fixed to the lower die base assembly.

[0017] As an optimized solution, the upper end portions of the upper die forming knife and the upper die forming punch are fixed on the upper die base assembly.

[0018] As an optimized solution, an ejector rod is fixed on the upper die base assembly, and the telescopic end of the ejector rod is fixedly connected to the upper end of the upper die forming ejector.

[0019] Compared with the prior art, the beneficial effects of the present invention are: The composite forging and pressing technology is a one-step forming process, eliminating the blanking layout occupation for pre-punch positioning and lacing establishment, greatly reducing the blanking waste in the layout, and the material utilization rate can be increased to over 65%. The composite forging and pressing technology uses a forging hydraulic press for forming, ensuring the oil pressure, and since it is a one-step forming process, it reduces the forming deviation caused by progressive multi-station processes, guaranteeing aspects such as forming quality to meet customer expectations. The composite forging and pressing technology integrates blanking and forming, eliminating the need for rough and fine cutting. One product only occupies one forging press and one labor, and it can achieve continuous feeding, greatly reducing resource occupation and improving production efficiency. Improve the utilization rate of raw materials, reduce the input cost of raw materials; improve the forming efficiency, increase production capacity; reduce the proportion of labor, and lower the manufacturing cost. Brief Description of the Drawings

[0020] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to actual scale.

[0021] Figure 1 Structural schematic diagram of the present invention in the mold-opening state; Figure 2 Structural schematic diagram of the positioning piercing bar contacting the strip in the mold-closing state of the present invention; Figure 3 Structural schematic diagram of the positioning piercing bar piercing the strip in the mold-closing state of the present invention; Figure 4 Structural schematic diagram of shearing the strip in the mold-closing state of the present invention; Figure 5 Structural schematic diagram of product forming in the mold-closing state of the present invention.

[0022] In the figure: 1 - upper die forming knife; 2 - lower die tooth ring edge pressing; 3 - upper die forming spring top; 4 - upper die forming punch; 5 - product upper surface forming surface; 6 - product lower surface forming surface; 7 - lower die forming punch; 8 - positioning piercing bar; 9 - lower stripping plate; 10 - guide strip; 11 - strip; 12 - unloading spring assembly; 13 - lower die base assembly; 14 - upper die base assembly; 15 - ejecting ejector rod; 16 - product; 17 - cutting hole; 18 - lifting guide pin. Detailed Embodiments

[0023] The following will describe in detail the embodiments of the technical solutions of the present invention in conjunction with the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention, so they are only examples and cannot be used to limit the protection scope of the present invention.

[0024] like Figures 1 to 5 As shown, the heat sink cover composite forging die includes an upper die forming knife 1 and a lower die gear ring clamping edge 2 arranged in parallel from top to bottom; the upper die forming knife 1 and the lower die gear ring clamping edge 2 are provided with a positioning structure for first positioning the material strip 11, then a shearing structure for shearing the material, and finally a forming structure for forming.

[0025] The shearing structure comprises a lower die forming punch 7 which is vertically lifted and lowered in the lower die gear ring pressure edge 2 , and a cutting hole 17 which matches the lower die forming punch 7 is formed in the upper die forming knife 1 .

[0026] The forming structure includes an upper die forming spring top 3 which is vertically slidably arranged in the cutting hole 17, an upper die forming punch 4 which is vertically raised and lowered in the upper die forming spring top 3, and a product upper surface forming surface 5 is formed by the height difference between the upper die forming punch 4 and the lower surface of the upper die forming spring top 3.

[0027] The forming structure includes a product lower surface forming surface 6 opened at the upper end of the lower die forming punch 7.

[0028] The positioning structure comprises a positioning piercing strip 8 which is arranged around the outer edge of the molding surface of the lower surface of the product.

[0029] The lower die gear ring pressure edge 2 is fixed on the lower stripping plate 9, and guide plates 10 are fixed to both ends of the lower stripping plate 9.

[0030] The lower stripping plate 9 is mounted on the lower die base assembly 13 by vertical sliding through the unloading spring assembly 12 .

[0031] The lower end of the lower die forming punch 7 is fixed on the lower die base assembly 13 .

[0032] The upper end portions of the upper die forming knife 1 and the upper die forming punch 4 are fixed on the upper die base assembly 14 .

[0033] An ejector rod 15 is fixed on the upper die base assembly 14 , and the telescopic end of the ejector rod 15 is fixedly connected to the upper end of the upper die forming ejector 3 .

[0034] A floating material guide pin 18 is provided on the lower die base assembly 13 , and the upper end of the floating material guide pin 18 abuts against the material strip 11 .

[0035] The working principle of this device is: In the mold open state, Figure 1 As shown, after the raw material is delivered in place, the upper die part moves downward, and the positioning piercing bar 8 first pierces the material to press the material to ensure that the material does not shift and the punching angle is as small as possible; like Figure 2 and Figure 3As shown in the figure, as the mold clamping action progresses step by step, the unloading spring assembly 12 is compressed, and the lower die forming punch 7 exposes the lower stripping plate 9. The punching of the material outline is achieved by using the cutting hole 17. After the punching action is completed, the material with the same size as the outline enters the cutting hole 17; As Figure 4 shown in the figure, the upper die part continues to move downward. During the complete closing of the mold, the upper die forming punch 4 and the upper die forming spring ejector 3 use the product upper surface forming surface 5 formed by the height difference to complete the upper surface forming of the product 16; As Figure 5 shown in the figure, after the forming is completed, the mold is opened; the lower stripping plate 9 completes the unloading action under the action of the unloading spring assembly 12, so that the strip 11 is separated from the product 16. The floating guide pin 18 supports the material to float upward under the action of the back spring to ensure the smooth feeding of the strip 11; the semi-finished product is ejected from the cavity by the upper die ejecting ejector rod 15 pressing against the upper die forming spring ejector 3. As Figure 1 shown, the entire product 16 is completed.

[0036] 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 foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered by the scope of the claims and the description of the present invention.

Claims

1. The composite forging die for the heat dissipation cover is characterized by: It comprises an upper die forming knife (1) and a lower die gear ring pressing edge (2) arranged in parallel from top to bottom; the upper die forming knife (1) and the lower die gear ring pressing edge (2) are provided with a positioning structure for first positioning the material strip (11), a shearing structure for shearing the material, and a forming structure for finally forming the material.

2. The heat dissipation cover composite forging die according to claim 1, characterized in that: The shearing structure comprises a lower die forming punch (7) which is vertically raised and lowered in the lower die gear ring pressure edge (2), and a cutting hole (17) matching the lower die forming punch (7) is provided in the upper die forming knife (1).

3. The heat dissipation cover composite forging die according to claim 2, characterized in that: The forming structure comprises an upper die forming spring top (3) which is vertically slidably arranged in the cutting hole (17), an upper die forming punch (4) which is vertically raised and lowered in the upper die forming spring top (3), and a product upper surface forming surface (5) is formed by a height difference between the upper die forming punch (4) and the lower surface of the upper die forming spring top (3).

4. The heat dissipation cover composite forging die according to claim 2, characterized in that: The molding structure comprises a product lower surface molding surface (6) opened at the upper end of the lower die molding punch (7).

5. The heat dissipation cover composite forging die according to claim 4, characterized in that: The positioning structure comprises a positioning piercing strip (8) arranged around the outer edge of the lower surface forming surface (6) of the product.

6. The heat dissipation cover composite forging die according to claim 2, characterized in that: The lower die gear ring pressure edge (2) is fixed on the lower stripping plate (9), and guide plates (10) are respectively fixed on both ends of the lower stripping plate (9).

7. The heat dissipation cover composite forging die according to claim 6, characterized in that: The lower stripping plate (9) is mounted on the lower die base assembly (13) in a vertically sliding manner via a discharge spring assembly (12).

8. The heat dissipation cover composite forging die according to claim 7, characterized in that: The lower end portion of the lower die forming punch (7) is fixed on the lower die base assembly (13).

9. The heat dissipation cover composite forging die according to claim 3, characterized in that: The upper end portions of the upper die forming knife (1) and the upper die forming punch (4) are fixed on the upper die seat assembly (14).

10. The heat dissipation cover composite forging die according to claim 9, characterized in that: An ejector rod (15) is fixed to the upper die seat assembly (14), and a telescopic end of the ejector rod (15) is fixedly connected to an upper end portion of the upper die forming ejector (3).

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