A die for free forging

Abstract

The utility model relates to a kind of by any forging and pressing die, by upper die and lower die, upper die includes upper die seat, punch and upper die sleeve, punch is connected and fixed by upper die sleeve with upper die seat;Lower die includes lower die seat, lower die core and lower die sleeve, lower die sleeve is set as cylindrical, and the center of lower die sleeve is equipped with forging and pressing cavity;Lower die sleeve is equipped in the upper surface of lower die seat, and lower die core is equipped in the cavity of lower die sleeve;Cavity is constituted by circular counterbore and lower chamber, and lower chamber is set as octagon hole;Lower die core is constituted by upper boss and lower core body, and upper boss is set as cylindrical, and lower core body is set as octagon that matches the lower chamber of lower die sleeve.This utility model changes the side of lower die sleeve and lower die core from the right angle edge of traditional forging and pressing die to arc edge, and the size of blank blanking is compensated using the extension amount generated by blank forging and pressing deformation during processing, the purpose of saving blank material is realized, and the turning amount of turning processing blank after forging and pressing is smaller, thereby help to improve production efficiency, and processing is more convenient.

Description

Technical Field

[0001] This utility model relates to the field of pipe fitting mold technology, specifically a forging mold. Background Technology

[0002] The applicant filed a patent application on August 5, 2015, entitled "High-Pressure Forging Die," with publication number CN104815937A. It consists of an upper die and a lower die. The upper die includes an upper die base, a punch, an upper inner die, an upper die sleeve, and an upper die sheath. The lower die includes a lower die base, a lower die core, a lower die sleeve, and a lower die sheath. The outer wall of the upper die sleeve and the inner hole of the upper die sheath, as well as the outer wall of the lower die sleeve and the inner hole of the lower die sheath, are taper fits. The bottom end face of the upper die sleeve has a stop that clearance-fits the top end of the lower die sleeve, leaving a gap between their end faces. This ensures that misalignment does not occur when the upper and lower dies are engaged, and the processed forgings are free of flash, thus saving material and reducing subsequent machining.

[0003] Because the lower die core and lower die sleeve of the aforementioned forging dies both have right-angled edges, a certain machining allowance usually needs to be reserved based on the dimensions on the drawing when cutting any blank. In actual production, due to the deformation of the metal material after forging, the dimensions of the blank in some areas will further increase, which not only leads to an increase in machining work, but also wastes some raw materials. Utility Model Content

[0004] The purpose of this invention is to provide a forging die that is advantageous in saving blank material, and has higher production efficiency and easier processing.

[0005] The objective of this utility model is achieved by adopting the following technical solution:

[0006] A forging die is provided, comprising an upper die and a lower die. The upper die includes an upper die base, a punch, and an upper die sleeve. The punch is connected and fixed to the upper die base through the upper die sleeve. The lower die includes a lower die base, a lower die core, and a lower die sleeve. The lower die sleeve is cylindrical and has a forging cavity at its center.

[0007] The lower die sleeve is mounted on the upper surface of the lower die base, and the lower die core is located inside the forging cavity of the lower die sleeve;

[0008] The forging cavity of the lower die sleeve is composed of a circular countersunk hole and a lower chamber, wherein the lower chamber is an octagonal hole;

[0009] The lower mold core consists of an upper boss and a lower core body. The upper boss is cylindrical, and the lower core body is an octagon that matches the lower cavity of the lower mold sleeve.

[0010] As a preferred embodiment of this utility model, the outer surface of the lower mold sleeve is composed of an annular surface and a conical surface.

[0011] As a preferred embodiment of this utility model, the included angle between the conical surface and the axis of the lower mold sleeve is 8 degrees.

[0012] As a preferred embodiment of this utility model, the sides of both the upper and lower end faces of the lower mold sleeve are rounded edges.

[0013] As a preferred embodiment of this utility model, the radius of the side arc of the upper end face is 5.0 mm; the radius of the side arc of the lower end face is 2.0 mm.

[0014] As a preferred embodiment of this utility model, both the upper and lower edges of the countersunk hole are designed as rounded edges.

[0015] As a preferred embodiment of this utility model, the radius of the upper hole edge arc is 1.0 mm; the radius of the lower hole edge arc is 2.0 mm.

[0016] As a preferred embodiment of this utility model, the upper side of the upper boss and the lower side of the lower core are both designed as rounded edges.

[0017] As a preferred embodiment of this utility model, the radius of the arc on the upper side of the upper protrusion is 2.0 mm; the radius of the arc on the lower side of the lower core is 5.0 mm.

[0018] The beneficial effects of this utility model are as follows: Compared with the prior art, this utility model changes the right-angled sides of the lower die sleeve and lower die core from the traditional forging die to rounded edges. During processing, the elongation generated by the forging deformation of the blank can be used to compensate for the blank blank size, thereby saving blank blank material. The turning amount of the blank after forging is smaller, which helps to improve production efficiency, reduce tool consumption, and make processing more convenient. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the lower mold sleeve of this utility model;

[0020] Figure 2 yes Figure 1 A top-view structural diagram;

[0021] Figure 3 This is a schematic diagram of the structure of the lower mold core of this utility model;

[0022] Figure 4 yes Figure 3 A top-view structural diagram.

[0023] In the diagram: 10. Lower mold sleeve; 11. Countersunk hole; 12. Lower cavity; 13. Annular surface; 14. Conical surface; 20. Lower mold core; 21. Upper boss; 22. Lower core body. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0025] like Figures 1 to 4 As shown, a forging die is provided, comprising an upper die and a lower die. The upper die includes an upper die base, a punch, and an upper die sleeve. The punch is connected and fixed to the upper die base via the upper die sleeve. The lower die includes a lower die base, a lower die sleeve 10, and a lower die core 20. The lower die sleeve 10 is cylindrical, and a forging cavity is provided at its center. The lower die sleeve 10 is located on the upper surface of the lower die base, and the lower die core 20 is located within the forging cavity of the lower die sleeve 10. The forging cavity of the lower die sleeve 10 is composed of a circular countersunk hole 11 and a lower chamber 12, with the lower chamber 12 being an octagonal hole. The lower die core 20 is composed of an upper boss 21 and a lower core 22. The upper boss 21 is cylindrical, and the lower core 22 is an octagon that matches the lower chamber 12 of the lower die sleeve 10.

[0026] In this embodiment, the outer surface of the lower mold sleeve 10 is composed of an annular surface 13 and a conical surface 14; the angle between the conical surface 14 and the axis of the lower mold sleeve 10 is 8 degrees; the sides of the upper and lower end surfaces of the lower mold sleeve 10 are both set as arc edges; the radius of the arc of the upper end surface side is 5.0 mm; the radius of the arc of the lower end surface side is 2.0 mm.

[0027] The upper and lower edges of the countersunk hole 11 are both rounded; the radius of the upper edge is 1.0 mm; and the radius of the lower edge is 2.0 mm.

[0028] The upper side of the upper boss 21 and the lower side of the lower core 22 are both rounded edges; the radius of the arc of the upper side of the upper boss 21 is 2.0 mm; the radius of the arc of the lower side of the lower core 22 is 5.0 mm.

[0029] This invention changes the side edges of the lower die sleeve and lower die core from the right-angled edges of traditional forging dies to rounded edges. During processing, the elongation generated by the forging deformation of the blank can be used to compensate for the blank cutting size, thereby saving blank material. The turning amount of the blank after forging is smaller, which helps to improve production efficiency, reduce tool consumption, and make processing more convenient.

[0030] The above embodiments are merely illustrative of the concept and technical features of this utility model, and are intended to enable those skilled in the art to understand the technical solution and implementation method of the utility model. They should not be construed as limiting the protection scope of this utility model. All equivalent substitutions or changes made according to the technical solution of this utility model should be covered within the protection scope of this utility model.

Claims

1. A forging die comprising an upper die and a lower die, the upper die including an upper die base, a punch, and an upper die sleeve, the punch being connected and fixed to the upper die base via the upper die sleeve; the lower die including a lower die base, a lower die core, and a lower die sleeve, characterized in that: The lower die sleeve is cylindrical, and a forging cavity is provided at the center of the lower die sleeve; The lower die sleeve is mounted on the upper surface of the lower die base, and the lower die core is located inside the forging cavity of the lower die sleeve; The forging cavity of the lower die sleeve is composed of a circular countersunk hole and a lower chamber, wherein the lower chamber is an octagonal hole; The lower mold core consists of an upper boss and a lower core body. The upper boss is cylindrical, and the lower core body is an octagon that matches the lower cavity of the lower mold sleeve.

2. The forging die according to claim 1, characterized in that: The outer surface of the lower mold sleeve is composed of an annular surface and a conical surface.

3. The forging die according to claim 2, characterized in that: The angle between the tapered surface and the axis of the lower mold sleeve is 8 degrees.

4. The forging die according to claim 1, characterized in that: The sides of both the upper and lower end faces of the lower mold sleeve are rounded.

5. The forging die according to claim 4, characterized in that: The radius of the arc on the side of the upper end face is 5.0 mm; The radius of the arc on the lower end face is 2.0 mm.

6. The forging die according to claim 1, characterized in that: Both the upper and lower edges of the countersunk hole are designed as rounded edges.

7. The forging die according to claim 6, characterized in that: The radius of the upper hole edge arc is 1.0 mm; the radius of the lower hole edge arc is 2.0 mm.

8. The forging die according to claim 1, characterized in that: The upper side of the upper boss and the lower side of the lower core are both designed as rounded edges.

9. The forging die according to claim 8, characterized in that: The radius of the arc on the upper side of the upper boss is 2.0 mm; the radius of the arc on the lower side of the lower core is 5.0 mm.

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