Die sleeve for powder forming die

文档序号：886217 发布日期：2021-03-23 浏览：2次中文

阅读说明：本技术 用于粉末成型模具的模套 (Die sleeve for powder forming die ) 是由何邦成何考贤于 2020-12-10 设计创作，主要内容包括：本发明揭示了一种用于粉末成型模具的模套,其包括模套本体以及固定部；模套本体包括第一本体及第二本体,第一本体的一端设于第二本体的一端,第一本体与第二本体一体成型；固定部围设于第二本体的外周壁,固定部与第二本体一体成型,固定部具有减力结构。减力结构削弱了固定部的箍紧力,从而削弱了固定部和第二本体所组成的孔壁的箍紧力,缩小了固定部与第二本体所组成的孔壁对模芯的箍紧力与第一本体对模芯的箍紧力的差距,减小了模芯的受力不均,避免模芯出现裂痕,提高模芯的使用寿命。(The invention discloses a die sleeve for a powder forming die, which comprises a die sleeve body and a fixing part, wherein the fixing part is arranged on the die sleeve body; the die sleeve body comprises a first body and a second body, one end of the first body is arranged at one end of the second body, and the first body and the second body are integrally formed; the fixing part is arranged around the peripheral wall of the second body and integrally formed with the second body, and the fixing part is provided with a force reducing structure. The force reducing structure weakens the tightening force of the fixing part, so that the tightening force of the hole wall formed by the fixing part and the second body is weakened, the difference between the tightening force of the hole wall formed by the fixing part and the second body to the mold core and the tightening force of the first body to the mold core is reduced, the uneven stress of the mold core is reduced, the mold core is prevented from cracking, and the service life of the mold core is prolonged.)

1. A die sleeve for a powder forming die is characterized by comprising

The die sleeve comprises a die sleeve body (1), wherein the die sleeve body (1) comprises a first body (11) and a second body (12), one end of the first body (11) is arranged at one end of the second body (12), and the first body (11) and the second body (12) are integrally formed; and

the fixing part (2) is arranged around the peripheral wall of the second body (12), the fixing part (2) and the second body (12) are integrally formed, and the fixing part (2) is provided with a force reducing structure (21).

2. The die case for a powder molding die according to claim 1, characterized in that: the force reducing structure (21) is a hole.

3. The die case for a powder molding die according to claim 2, characterized in that: the force reducing structure (21) is a through hole, the force reducing structure (21) penetrates through the upper surface and the lower surface of the fixing part (2), and the force reducing structure (21) is uniformly distributed on the fixing part (2).

4. The die case for a powder molding die according to claim 2, characterized in that: the force reducing structures (21) are blind holes, and the force reducing structures (21) are uniformly distributed on the upper surface, the lower surface and/or the side wall of the fixing part (2).

5. The die case for a powder molding die according to claim 1, characterized in that: the force reducing structure (21) is a groove.

6. The die case for a powder molding die according to claim 5, characterized in that: the force reducing structure (21) is an annular groove, and the force reducing structure (21) is arranged on the upper surface, the lower surface and/or the side wall of the fixing part (2).

7. The die case for a powder molding die according to claim 1, characterized in that: the force reducing structure (21) is a notch.

8. The die case for a powder molding die according to claim 7, characterized in that: the force reducing structure (21) penetrates through the upper surface and the lower surface of the fixing part (2), and the force reducing structure (21) is uniformly wound on the fixing part (2).

9. The die case for a powder molding die according to claim 7, characterized in that: the force reducing structure (21) is arranged on the upper surface or the lower surface of the fixing part (2), and the force reducing structure (21) is uniformly wound on the fixing part (2).

Technical Field

The invention relates to the field of powder forming dies, in particular to a die sleeve for a powder forming die.

Background

The powder forming die is used for making blanks through powder metallurgy, and is provided with a female die, the female die comprises a die sleeve and a die core, the die sleeve is provided with an inner hole matched with the die core, the die core is sleeved in the inner hole, and the die core and the die sleeve are in interference fit. When powder is pressed, the female die needs to move under the drive of the press.

In the prior art, in order to fix the female die to the press, as shown in fig. 1, one end of the die sleeve is designed to be step-shaped, specifically, the die sleeve includes a die sleeve body 1 and a fixing portion 2, the die sleeve body 1 includes a first body 11 and a second body 12, one end of the first body 11 is disposed at one end of the second body 12, the fixing portion 2 is annularly disposed at the outer side of the second body 12, and the fixing portion is clamped to the press. Thus, the thickness of the second body 12 and the fixing portion 2 is large, and the thickness of the first body 11 is small.

Because the mold core and the mold sleeve are in interference fit, the mold sleeve applies a clamping force to the mold core, the part with the large wall thickness has the large clamping force to the mold core, and the part with the small wall thickness has the small clamping force to the mold core, so that the stress of the mold core is seriously uneven, cracks are easy to appear on the mold core, and the service life of the mold core is shortened.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a die sleeve for a powder forming die, which comprises a die sleeve body and a fixing part; the die sleeve body comprises a first body and a second body, one end of the first body is arranged at one end of the second body, and the first body and the second body are integrally formed; the fixing part is arranged around the peripheral wall of the second body and integrally formed with the second body, and the fixing part is provided with a force reducing structure.

Preferably, the force reducing structure is a hole.

Preferably, the force reducing structures are through holes, the force reducing structures penetrate through the upper surface and the lower surface of the fixing portion, and the force reducing structures are uniformly distributed on the fixing portion.

Preferably, the force reducing structures are blind holes, and the force reducing structures are uniformly distributed on the upper surface, the lower surface and/or the side wall of the fixing part.

Preferably, the force reducing structure is a groove.

Preferably, the force reducing structure is an annular groove, and the force reducing structure is arranged on the upper surface, the lower surface and/or the side wall of the fixing part.

Preferably, the force reducing structure is a notch.

Preferably, the force reducing structures penetrate through the upper surface and the lower surface of the fixing part, and the force reducing structures are uniformly wound on the fixing part.

Preferably, the force reducing structure is arranged on the upper surface or the lower surface of the fixing part, and the force reducing structure is uniformly wound on the fixing part.

Compared with the prior art, the force reducing structure weakens the tightening force of the fixed part, thereby weakening the tightening force of the hole wall formed by the fixed part and the second body, reducing the difference between the tightening force of the hole wall formed by the fixed part and the second body to the mold core and the tightening force of the first body to the mold core, reducing the uneven stress of the mold core, avoiding the occurrence of cracks on the mold core and prolonging the service life of the mold core.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a schematic diagram of a prior art structure;

FIG. 2 is a schematic structural view of a die case according to embodiments 1 and 2;

FIG. 3 is a schematic view showing the structure of a die case according to example 3;

FIG. 4 is a second schematic view of the structure of the die case in example 3;

FIG. 5 is a schematic view showing the structure of a die case according to example 4;

FIG. 6 is a schematic view showing the structure of a master model in example 5.

Reference numerals: 1, a die sleeve body; 11 a first body; 12 a second body; 2, a fixed part; 21 force reducing structure.

Detailed Description

In the following description, for purposes of explanation, numerous implementation details are set forth in order to provide a thorough understanding of the various embodiments of the present invention. It should be understood, however, that these implementation details are not to be interpreted as limiting the invention. That is, in some embodiments of the invention, such implementation details are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings.

The description of the present invention as to "first", "second", etc. is for descriptive purposes only, and not for purposes of particular ordinal or sequential meaning, nor for limitations, and is intended to identify components or operations described in the same technical language, but is intended to be construed as indicating or implying any relative importance or implicit identification of any number of technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

For a further understanding of the contents, features and effects of the present invention, the following examples are illustrated in the accompanying drawings and described in the following detailed description:

example 1:

referring to fig. 2, fig. 2 is a schematic structural diagram of the mold chase in embodiments 1 and 2. The surface close to the first body 11 is defined as an upper surface, and the surface far from the first body 11 is defined as a lower surface. The embodiment provides a die sleeve for a powder forming die, which comprises a die sleeve body 1 and a fixing part 2, wherein the fixing part 2 is fixedly connected with the peripheral wall of the die sleeve body 1.

The die sleeve body 1 comprises a first body 11 and a second body 12, one end of the first body 11 is arranged at one end of the second body 12, and the first body 11 and the second body 12 are integrally formed. The fixing portion 2 is disposed around the outer peripheral wall of the second body 12, and the fixing portion 2 and the second body 12 are integrally formed. The anchoring portion 2 is provided with force-reducing structures 21, which force-reducing structures 21 serve to weaken the tightening force of the anchoring portion 2. Preferably, the material of the die sleeve body 1 is the same as that of the fixing portion 2, and the die sleeve body 1 and the fixing portion 2 are integrally formed.

Furthermore, the force reducing structure 21 is a through hole, the through hole penetrates through the upper surface and the lower surface of the fixing part 2, and the through hole is uniformly and annularly arranged on the fixing part 2.

The through holes weaken the tightening force of the fixing part, so that the hole wall tightening force formed by the fixing part and the second body is weakened, and the difference between the tightening force of the hole wall formed by the fixing part and the second body to the mold core and the tightening force of the first body to the mold core is reduced.