阅读说明：本技术 一种超薄散热片精密锻压模具结构 (Ultra-thin fin precision forging mould structure ) 是由 董其刚 于 2021-09-25 设计创作，主要内容包括：一种超薄散热片精密锻压模具结构,涉及模具装置技术领域,包括上模组件与下模组件,上模组件通过上模固定环固定有上模仁,下模仁通过紧靠件连接有与上模仁相对设置的下模仁。本发明解决了传统技术中的装置先冲压粗加工,再数控精加工,该方式产能难以提升,且成本过高；以及冲头在对原料进行锻压时,冲头易产生径向应力,降低了冲头使用寿命的问题。(The utility model provides an accurate forging mould structure of ultra-thin fin, relates to mould device technical field, including last mould subassembly and lower mould subassembly, goes up the mould subassembly and is fixed with mould benevolence through last mould solid fixed ring, and the lower mould benevolence that the lower mould benevolence is connected with and goes up the relative setting of mould benevolence through near the piece. The invention solves the problems that the device in the traditional technology firstly performs stamping rough machining and then performs numerical control finish machining, the productivity is difficult to improve and the cost is overhigh; and when the punch forges and presses the raw material, the punch is easy to generate radial stress, and the service life of the punch is reduced.)

1. The utility model provides an accurate forging mould structure of ultra-thin fin which characterized in that: the mold comprises an upper mold component and a lower mold component, wherein the upper mold component is fixed with an upper mold core (11) through an upper mold fixing ring (3), and the lower mold core (13) is connected with a lower mold core (13) which is arranged opposite to the upper mold core (11) through an abutting piece.

2. The ultra-thin fin precision forging die structure of claim 1, wherein: the abutting piece comprises a lower die fixing sleeve (12) with a conical outer ring, and the small-diameter outer ring end of the lower die fixing sleeve (12) is located above.

3. The ultra-thin fin precision forging die structure of claim 1, wherein: the upper die core (11) and the lower die core (13) are of a double-layer nested structure.

4. The ultra-thin fin precision forging die structure of claim 3, wherein: the double-layer nested structure comprises an outer ring and a mold core which are in interference fit.

5. The ultra-thin fin precision forging die structure of claim 1, wherein: the upper die assembly comprises an upper base plate (2), the upper die fixing ring (3) is fixed below the upper base plate (2), and the upper die core (11) is fixed in a lower port of the upper die fixing ring (3).

6. The ultra-thin fin precision forging die structure of claim 2, wherein: the lower die assembly comprises a lower base plate (7), the lower die fixing sleeve (12) is fixed on the upper surface of the lower base plate (7) through a lower die fastening ring (6), and the lower die core (13) is fixed in the lower die fixing sleeve (12).

7. The ultra-thin fin precision forging die structure of claim 6, wherein: the inner wall of the lower die fastening ring (6) is matched with the outer wall of the lower die fixing sleeve (12).

8. The ultra-thin fin precision forging die structure of claim 5, wherein: and a punch head cushion block (4) is also arranged at the position, close to the upper port, in the upper die fixing ring (3).

9. The ultra-thin fin precision forging die structure of claim 6, wherein: the lower surface rigid coupling of lower bolster (7) has die holder (8), vertically on die holder (8) be connected with ejector pin (16), be equipped with on lower bolster (7) with apical axis (15) that ejector pin (16) are connected, the inner circle of lower mould benevolence (13) still be equipped with apical core (14) that apical axis (15) are connected.

10. The ultra-thin fin precision forging die structure of claim 1, wherein: the inner ring of the upper die core (11) is also provided with a die core jacking core (10).

Technical Field

The invention relates to the technical field of die devices, in particular to a precise forging die structure for an ultrathin radiating fin.

Background

Forging is the combination of forging and stamping, and is a forming method for obtaining a product with a required shape and size by applying pressure to a blank by using a hammer head, an anvil block, a punch head or through a die of a forging and stamping machine to generate plastic deformation. After forging, a workpiece forging and pressing die in the prior art cannot achieve timely stripping treatment, secondary ejection operation is needed, production efficiency is low, a buffer device is not arranged between an upper die and a lower die, abrasion between the upper die and the lower die can be caused during processing, and the service life of the die is shortened. .

With the gradual improvement of the computing power of a computer, the heat dissipation capability of a CPU computing core becomes a problem that a plurality of chip manufacturers need to overcome, wherein a heat sink used for packaging in the aspect begins to be changed into special-shaped parts from a traditional stamping flat plate part and a traditional stretching part gradually with the requirement of technical development, so that the cost is increased, and the requirements on the flatness and the dimensional accuracy are high.

The patent discloses a CN213002437U among the prior art, this scheme is including bearing substrate, the last lower extreme mould that is provided with of bearing substrate, be provided with high adjusting device on the bearing substrate, the last upper end mould that is provided with of high adjusting device, it holds the chamber to be provided with the processing in the lower extreme mould, the processing is held the intracavity and is provided with and holds the board, hold and install vibration damper between board and the lower extreme mould, be provided with forging and pressing processing chamber in the upper end mould, be provided with forging and pressing device in the forging and pressing processing, be connected with forging and pressing drive assembly on the forging and pressing device, forging and pressing drive assembly installs in upper end mould top, be connected with the motion guide assembly on the forging and pressing device, the motion guide assembly is installed on the upper end mould, the last controlling means that installs of bearing substrate, controlling means links to each other with forging and pressing device. From this, adopt mutually supporting lower extreme mould, upper end mould, can realize the formula of matcing and fold forging and pressing, the waste material can not appear splashing, and unexpected wearing and tearing can not appear.

However, the device gradually exposes the defects of the technology in production and use, and mainly shows the following aspects:

firstly, the existing forging and pressing die is used for stamping rough machining and then finish machining by using a numerical control machine when machining the CPU radiating fin, when machining the precise radiating fin with a complex and irregular shape, the machining cannot be carried out, the cost of the mode is too high, and the productivity is difficult to promote.

Secondly, when the existing device forges and presses the radiating fin, the punch head easily generates radial stress when forging and pressing the raw material, and the service life of the punch head is reduced.

In view of the above, the prior art is obviously inconvenient and disadvantageous in practical use, and needs to be improved.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a precision forging and pressing die structure for an ultrathin radiating fin, which is used for solving the problems that the yield is difficult to improve and the cost is overhigh in the mode that a device in the traditional technology firstly performs stamping rough machining and then performs numerical control finish machining; and when the punch forges and presses the raw material, the punch is easy to generate radial stress, and the service life of the punch is reduced.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides an accurate forging mould structure of ultra-thin fin, includes mould assembly and lower mould assembly, mould assembly is fixed with upper die benevolence through last mould solid fixed ring, lower die benevolence through near the piece be connected with the lower die benevolence that the upper die benevolence set up relatively.

As an optimized scheme, the abutting piece comprises a lower die fixing sleeve with an outer ring in a conical shape, and the small-diameter outer ring end of the lower die fixing sleeve is located above.

As an optimized scheme, the upper die core and the lower die core are of a double-layer nested structure.

As an optimized scheme, the double-layer nested structure comprises an outer ring and a mold core which are in interference fit.

As an optimized scheme, the interference fit amount of the outer ring and the mold core is not less than 0.4 mm.

As an optimized scheme, the outer ring is a No. 45 steel ring, and the mold core is an HRC65 cold-work mold.

As an optimized scheme, an included angle between the opposite outer walls of the lower die core fixing sleeve is 8 degrees.

As an optimized scheme, the upper die assembly comprises an upper base plate, the upper die fixing ring is fixed below the upper base plate, and the upper die core is fixed in a lower port of the upper die fixing ring.

As an optimized scheme, an upper die base is fixed on the upper surface of the upper backing plate through a backing plate screw.

As an optimized scheme, the lower die assembly comprises a lower base plate, the lower die fixing sleeve is fixed on the upper surface of the lower base plate through a lower die fastening ring, and the lower die core is fixed in the lower die fixing sleeve.

As an optimized scheme, the inner wall of the lower die fastening ring is matched with the outer wall of the lower die fixing sleeve.

As an optimized scheme, the lower surface of the lower backing plate is fixedly connected with a lower die base through a backing plate screw.

As an optimized scheme, a punch head cushion block is further arranged at a position, close to the upper port, in the upper die fixing ring.

As an optimized scheme, the annular wall of the upper die fixing ring is respectively and vertically in threaded connection with fixing screws for fixing the punch cushion block and the upper die core.

As an optimized scheme, the lower die base is vertically connected with an ejector rod, the lower backing plate is provided with an ejector shaft connected with the ejector rod, and the inner ring of the lower die core is further provided with an ejector core connected with the ejector shaft.

As an optimized scheme, the inner ring of the upper die core is also provided with a die core jacking core.

Compared with the prior art, the invention has the beneficial effects that:

the precision forging and pressing die for the ultrathin radiating fin is novel in structural design and simple in structure, and can efficiently realize the forming and processing of the ultrathin radiating fin;

the device can be applied to forging and pressing the radiating fins with complex shapes such as CPU radiating fins and the like, does not need to replace equipment, reduces the production cost and improves the productivity;

the upper die core and the lower die core are designed in a double-layer nested mode, the outer layer is a steel ring made of 45# steel, the inner layer is a die core made of cold-work die steel of HRC65, the upper die core and the lower die core are in interference fit, the interference magnitude is 0.4mm, and the upper die core and the lower die core are assembled together after heating, so that the structure can effectively offset the radial stress when the punch is extruded, and the service life of the punch is prolonged;

the manufacturing cost is low, and the maintenance is convenient; the design is reasonable, and the matching among structures is precise; the operation is convenient and fast; the stability in the working process is improved; the parts are few, the working procedure is simple and convenient, and the failure rate is low; the structure is simple, and the service life is long; simple and convenient operation and control, easy large-scale manufacture and installation and wide application range.

Drawings

In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a schematic structural diagram of the present invention.

In the figure: 1-an upper die holder; 2-upper cushion plate; 3-upper die fixing ring; 4-a punch pad block; 5-fixing screws; 6-lower die fastening ring; 7-lower backing plate; 8-a lower die holder; 9-backing plate screws; 10-a mold core jacking core; 11-upper die core; 12-lower die fixing sleeve; 13-lower die core; 14-a top core; 15-a top shaft; 16-ejector pin.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

As shown in fig. 1, the precision forging and pressing mold structure for ultra-thin heat dissipation sheet includes an upper mold assembly and a lower mold assembly, wherein the upper mold assembly is fixed with an upper mold core 11 through an upper mold fixing ring 3, and the lower mold core 13 is connected with a lower mold core 13 opposite to the upper mold core 11 through an abutting piece.

The abutting piece comprises a lower die fixing sleeve 12 with a conical outer ring, and the small-diameter outer ring end of the lower die fixing sleeve 12 is arranged above.

The upper die core 11 and the lower die core 13 are both of a double-layer nested structure.

The double-layer nested structure comprises an outer ring and a mold core which are in interference fit.

The interference fit amount of the outer ring and the die core is not less than 0.4 mm.

The outer ring is No. 45 steel ring, and the mold core is HRC65 cold-working mold.

The angle between the fixed sleeve of the lower die core 13 and the relative outer wall is 8 degrees.

The upper die assembly comprises an upper backing plate 2, an upper die fixing ring 3 is fixed below the upper backing plate 2, and an upper die core 11 is fixed in a lower port of the upper die fixing ring 3.

The upper surface of the upper backing plate 2 is fixed with an upper die base 1 through a backing plate screw 9.

The lower die component comprises a lower backing plate 7, a lower die fixing sleeve 12 is fixed on the upper surface of the lower backing plate 7 through a lower die fastening ring 6, and a lower die core 13 is fixed in the lower die fixing sleeve 12.

The inner wall of the lower die fastening ring 6 is matched with the outer wall of the lower die fixing sleeve 12.

The lower surface of the lower backing plate 7 is fixedly connected with a lower die base 8 through a backing plate screw 9.

And a punch head cushion block 4 is also arranged at the position, close to the upper port, in the upper die fixing ring 3.

The ring wall of the upper die fixing ring 3 is vertically and threadedly connected with a fixing screw 5 for fixing the punch cushion block 4 and the upper die core 11.

The lower die base 8 is vertically connected with a mandril 16, the lower backing plate 7 is provided with a jacking shaft 15 connected with the mandril 16, and the inner ring of the lower die core 13 is also provided with a jacking core 14 connected with the jacking shaft 15.

The inner ring of the upper die core 11 is also provided with a die core jacking core 10.

The invention also discloses a use method of the ultrathin radiating fin precision forging die structure, which comprises seven steps:

the first step is as follows:

blanking the stamping die, wherein the material is blanked according to a sheet material, the thickness is generally 1.0-5.0 mm, and then the preferable metals such as oxygen-free copper, brass, red copper, aluminum and the like are available.

The second step is that:

and forging and pressing the depth and the bottom thickness of the boss and the cooling fin cavity. The punch head is provided with plane compensation, so that the material flows smoothly and the thickness of the bottom surface is consistent. The punch is also provided with a die core ejector core 10 for forming and discharging the boss.

The third step:

forging and forming flange edges and finishing the overall dimension of a product, wherein a punch at the position is designed to be double-layer nested, a steel ring made of 45# steel is arranged on the outer layer, a die core made of cold-work die steel with HRC65 is arranged on the inner layer, the steel ring and the die core are in interference fit, the interference magnitude is 0.4mm, and the steel ring and the die core are assembled together after heating. The structure can effectively offset the radial stress of the punch during extrusion, and the service life of the punch is prolonged.

The fourth step:

and (5) punching and rough cutting to remove waste materials at the edges of the product for the next step.

The fifth step:

forging and pressing the bottom surface of the product to control the flatness of the bottom surface of the product within 0.02 mm.

And a sixth step:

the thickness of the forged flange and the final thickness dimension of the product.

The seventh step:

and punching and finely cutting the edge waste to obtain a final product.

Taking the forging and pressing steps as an example:

in the working process of the invention, the product which is punched in the first step is firstly placed on the lower die core 13, then the forging and pressing upper die component is driven by the press to move downwards, in the process, the upper die core 11 firstly contacts the product, and the product pressed between the upper die core 11 and the lower die core 13 deforms along with the continuous downward movement of the upper die core 11 under the driving action of the press, and the product can be completely deformed into the shape of the die core when the die is closed.

The problems of material deformation and large size deviation of the forging and pressing of ultrathin sheet products are solved through multi-step forming. Obtaining high-quality products.

According to the situation, the device has the advantages of novel design and simple structure through the structural design, and the ultra-thin radiating fin can be efficiently formed and processed.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.