CN216729354U

CN216729354U - Outer die disc for hot forging of driven gear blank

Info

Publication number: CN216729354U
Application number: CN202123150426.XU
Authority: CN
Inventors: 滕斐; 宋文静; 高永强; 胡红彦; 郑冠军; 李永德; 梁少康
Original assignee: ZHENGZHOU HUAWEI GEAR CO Ltd
Current assignee: ZHENGZHOU HUAWEI GEAR CO Ltd
Priority date: 2021-12-15
Filing date: 2021-12-15
Publication date: 2022-06-14
Anticipated expiration: 2031-12-15

Abstract

An outer die disc for hot forging a driven gear blank comprises an outer die disc, wherein the outer die disc is integrally in a circular truncated cone shape, the inner bottom surface of the outer die disc is a small bottom surface, and the outer bottom surface of the outer die disc is a large bottom surface. The edge part of the outer bottom surface of the outer mould disc is fixedly provided with a convex outer baffle ring. Compared with the prior art, the technical effect of the utility model is that, the utility model discloses a side of outer mould dish is the round platform form, can directly hot forging for the taper body, need not to cut the round at its outer surface, can use littleer hot forging raw materials, has saved the raw materials.

Description

Outer die disc for hot forging of driven gear blank

Technical Field

The utility model relates to a hot forging processing driven gear base is with outer die disc.

Background

At present, there are several machining methods for the driven gear, one of which is hot forging: hot forging to obtain a blank, and turning.

Referring to fig. 1-2, the hot forging raw material 10 has a disk shape having a center hole 11, and referring to fig. 5, when processing, the center hole 11 of the hot forging raw material 10 is placed on the mandrel 21, and the inner side surface of the hot forging raw material 10 is attached to the stopper ring 21 of the mandrel 21, and the hot forging raw material 10 is pressed downward by the columnar surface of the outer die plate 30, and at the same time, the outer die plate 30 is rotated, and when the outer die plate 30 is moved to the lower limit position, the center hole 11 of the hot forging raw material 10 becomes large, the outer diameter becomes smaller, the thickness becomes thicker, and becomes a hot forging raw material 40, which is relatively close to the profile of the driven gear, referring to fig. 3.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem who solves: in practice, the profile of the tooth surface of the driven gear is a conical surface, and when the hot forged blank 40 is machined, the outer surface of the hot forged blank 40 needs to be cut by one turn, see reference numeral 12 in fig. 4, so that the outer surface of the hot forged blank 40 is a conical surface 13 and is closer to the profile of the driven gear, and thus, part of the raw material (namely, the area pointed by reference numeral 12) is wasted.

The technical scheme of the utility model specifically does:

an outer die disc for hot forging a driven gear blank comprises an outer die disc, wherein the outer die disc is integrally in a circular truncated cone shape, the inner bottom surface of the outer die disc is a small bottom surface, and the outer bottom surface of the outer die disc is a large bottom surface.

The edge part of the outer bottom surface of the outer mould disc is fixedly provided with a convex outer baffle ring.

Compared with the prior art, the technical effect of the utility model is that, the utility model discloses a side of outer mould dish is the round platform form, can directly hot forging for the taper body, need not to cut the round at its outer surface, can use littleer hot forging raw materials, has saved the raw materials.

Drawings

FIG. 1 is a schematic view of a prior art hot forging stock.

Fig. 2 is a schematic cross-sectional view of fig. 1.

FIG. 3 is a schematic view of a prior art hot forged blank.

Fig. 4 is a schematic view showing a hot forging of a hot forging raw material according to the prior art.

FIG. 5 is a schematic view of a prior art conical hot forged blank.

Fig. 6 is a schematic diagram (one) of the present invention.

Fig. 7 is a schematic diagram (ii) of the present invention.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments thereof.

As shown in fig. 6, the outer die disc for hot forging a driven gear blank comprises an outer die disc 30, wherein the outer die disc 30 is in a circular truncated cone shape as a whole, an inner bottom surface 32 (a side close to the retainer ring 21 of the mandrel 20) of the outer die disc 30 is a small bottom surface, and an outer bottom surface 33 (a side far from the retainer ring 21 of the mandrel 20) of the outer die disc 30 is a large bottom surface.

As shown in fig. 7, the protruding outer stop ring 36 is fixed to the edge of the outer bottom surface 33 of the outer mold plate 30, and the outer stop ring 36 and the stop ring 21 form a double-sided constraint to facilitate the positioning of the hot forging material.

The working principle is as follows:

when the use is required, the central hole of the hot forging material is placed on the core rod 21, the inner side surface of the hot forging material is attached to the baffle ring 21 of the core rod 21, the hot forging material is pressed downwards by the tapered surface 31 of the outer die disc 30, simultaneously, the outer die disc 30 rotates, when the outer die disc 30 moves to the lower limit position, the central hole of the hot forging material becomes larger, the outer diameter becomes smaller, the thickness becomes thicker, and the hot forging material 40 which becomes tapered is relatively close to the outline of the driven gear.

So design can not only save raw materials, moreover, still have two specificities:

first, a cutting step of cutting the columnar hot forged blank into the tapered hot forged blank can be saved.

Secondly, when the tapered surfaces 31 of the outer die plate 30 press the hot forging material downward, the component force of the pressure of the tapered surfaces 31 against the hot forging material in the axial direction of the mandrel 20 restrains the hot forging material, thereby facilitating the positioning of the hot forging material.

See the prior art for additional details.

While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the general inventive concept, and it is intended to cover all such changes and modifications as fall within the true spirit and scope of the invention.

Claims

1. The utility model provides a hot forging processing external die dish for driven gear base, includes external die dish (30), its characterized in that: the outer die disc (30) is integrally in a circular truncated cone shape, the inner bottom surface (32) of the outer die disc (30) is a small bottom surface, and the outer bottom surface (33) of the outer die disc (30) is a large bottom surface.

2. The outer die disc for hot forging a driven gear blank as claimed in claim 1, wherein: the edge part of the outer bottom surface (33) of the outer mould disc (30) is fixed with a convex outer baffle ring (36).