阅读说明：本技术 一种用于汽车半轴法兰盘成型的锻压凹模 (Forging and pressing female die for forming automobile half-shaft flange plate ) 是由 刘家山 于 2020-03-25 设计创作，主要内容包括：本发明公布了一种用于汽车半轴法兰盘成型的锻压凹模,包括外模及可拆卸连接在所述外模中的内模。本发明,仅需更换内模,搬运方便,更换成本低。(The invention discloses a forging and pressing female die for molding a flange plate of an automobile half shaft, which comprises an outer die and an inner die detachably connected in the outer die. The invention only needs to replace the inner mold, is convenient to carry and has low replacement cost.)

1. The forging and pressing female die for molding the automobile half-shaft flange is characterized by comprising an outer die (1) and an inner die (2) detachably connected in the outer die (1).

2. The forging die for forming the automobile half-shaft flange plate as claimed in claim 1, wherein the inner die (2) is composed of two half inner dies (21).

3. The forging die for molding the automobile half-shaft flange plate as claimed in claim 2, wherein the outer die (1) consists of two half outer dies (11) and is respectively connected with the two half inner dies (21).

4. The forging die for forming the automobile half-shaft flange plate as claimed in claim 1, wherein the outer die (1) and the inner die (2) are connected through radial connectors (3).

5. A forging die for forming automobile half-shaft flanges according to claim 4, wherein the radial connectors (3) are threaded connectors.

6. The forging die for forming the automobile half-shaft flange plate as claimed in claim 4, wherein the radial connecting piece (3) is a connecting plunger, and plunger holes are correspondingly formed in the outer die (1) and the inner die (2).

7. The forging die for forming the automobile half-shaft flange plate as claimed in claim 6, wherein the connecting plunger comprises a plunger base body (30) which is internally provided with a hollow inner cavity (31) and is provided with a micro-deformation part (32) facing the wall of the plunger hole and having a micro-deformation amount on the side of the hollow inner cavity (31), and a pulling head (33) arranged on the plunger base body (30), wherein the hollow inner cavity (31) is filled with liquid water and a plurality of thermal expansion particles.

8. The forging and pressing female die for molding the automobile half-shaft flange is characterized in that the micro-deformation amount of the micro-deformation part (32) is 0.1-1 mm.

Technical Field

The invention relates to the field of automobile half shaft forming, in particular to a forging female die for forming automobile half shaft flanges.

Background

The important point in the blank forging process of the automobile half shaft is the formation of a flange which is generally formed by hot extrusion finish forging on a swing mill, the material of a die is generally 3Cr2W8V, and the stress condition of the die is as follows: the die not only bears compressive stress and bending stress, but also bears certain tensile stress during demoulding, and the die is in contact with a hot blank and needs water cooling, so that the die bears thermal fatigue and hot flushing caused by cold and hot stress. Under such severe service conditions, the die often suffers thermal fatigue (crack) cracks and is discarded, the service life is very short, and the die needs to be replaced frequently.

Common dies such as a swing mill forming die disclosed in the application number CN201620296743.2 and an automobile half-shaft swing mill forming process die disclosed in the application number CN201210278749.3 have the disadvantages of heavy weight of a female die, high die cost, high carrying strength after disassembly and before assembly, time and labor consumption and high replacement cost.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the forging and pressing female die for forming the automobile half-shaft flange plate, which only needs to replace the inner die, is convenient to carry and has low replacement cost.

A forging and pressing female die for forming automobile half-shaft flanges comprises an outer die and an inner die detachably connected in the outer die. In the technical scheme, the female die is set into the outer die and the inner die which can be mutually detached, and the inner die which is in direct contact with the incandescent blank is easy to damage, so that only the inner die is replaced when the female die is replaced, and the die has the advantages of convenience in carrying, low replacement cost and the like.

Preferably, the inner mold consists of two half inner molds. Can be selectively replaced according to the damaged part.

Preferably, the outer die consists of two half outer dies and is respectively connected with the two half inner dies.

Preferably, the outer die and the inner die are connected through a radial connector.

Preferably, the radial connector is a threaded connector.

As another preferable aspect of the radial connecting piece, the radial connecting piece is a connecting plunger, and plunger holes are correspondingly arranged on the outer die and the inner die.

Due to the impact of forging and pressing, the inner die is easy to deform slightly, so that the plunger hole is very tightly attached to the connecting plunger, the connecting plunger is difficult to pull out through manpower on a forging press machine after the inner die and the inner die are in interference fit, the inner die is not convenient to detach and replace, preferably, the connecting plunger comprises a plunger base body and a pulling head, wherein a hollow inner cavity is arranged in the plunger base body, a micro-deformation part facing the wall of the plunger hole and having a micro-deformation amount is formed on the side of the hollow inner cavity, the pulling head is arranged on the plunger base body, and the hollow inner cavity is filled with liquid water and a plurality. The arrangement effectively solves the problem that the connecting column plug is not easy to pull out after forging and pressing the blank, when forging and pressing the glowing blank, the thermal expansion particles and the liquid water in the hollow inner cavity respectively expand and vaporize by utilizing the transferred heat, so that the hollow inner cavity is in an expansion state or a growing trend, the plunger matrix is tightly propped against the wall of the plunger hole, the connection stability of the outer mold and the inner mold is ensured, the part of the inner mold which is impacted by forging and pressing at the wall of the plunger hole is not easy to deform or deform very little, after the inner mold and the connecting plunger are cooled, the thermal expansion particles shrink, the gaseous water is changed into the liquid water, the total volume of the two is reduced, the whole hollow inner cavity is not filled with the whole hollow inner cavity, the hollow inner cavity has the capability of reducing, under the effect of powerful manual pulling-out force, the micro-, the disassembly and replacement of the inner die are facilitated. And the deformation is limited in a micro deformation range, so that the most basic structural strength of the connecting plunger is ensured.

Preferably, the micro-deformation amount of the micro-deformation part is 0.1-1 mm.

In conclusion, the invention has the following beneficial effects:

1. only the inner mold needs to be replaced, the carrying is convenient, and the replacement cost is low;

2. the connecting plunger with a special structure is arranged to serve as a radial connecting piece, so that the replacement efficiency of the inner die is improved.

Drawings

FIG. 1 is a schematic diagram of the installation of a female mold;

FIG. 2 is a schematic view of another view of the installation of the female mold;

fig. 3 is a schematic diagram of the structure of the connecting plunger.

Detailed Description

The invention will be further explained by means of specific embodiments with reference to the drawings.