CN219263025U

CN219263025U - Bell shell blank before cold forging forming

Info

Publication number: CN219263025U
Application number: CN202223588047.3U
Authority: CN
Inventors: 陈海军; 季微微; 刘建英; 张花根
Original assignee: JIANGSU CHUANGYI PRECISION FORGING CO LTD
Current assignee: JIANGSU CHUANGYI PRECISION FORGING CO LTD
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-06-27
Anticipated expiration: 2032-12-30

Abstract

The utility model provides a blank of a bell housing before cold forging forming, which comprises a bell housing main body and an output shaft fixedly connected with the bell housing main body. The end face of the bell housing main body, which is connected with the output shaft, is provided with a tooth extrusion groove and a forming surface, the tooth extrusion groove is arranged around the output shaft, and the forming surface is outwards scattered from the outer edge of the tooth extrusion groove to form a shape with a low inside and a high outside. The utility model has the advantages of improving the surface quality of the end face teeth, improving the dimensional accuracy, ensuring sufficient extrusion of the end face teeth, improving the efficiency, reducing the rejection rate, improving the productivity and the like.

Description

Bell shell blank before cold forging forming

Technical Field

The utility model relates to the field of dies, in particular to a blank of a bell housing before cold forging forming.

Background

Before cold forging, the end face teeth are extruded, a warm forging bell housing blank is arranged, graphite is attached to the surface of the warm forging bell housing, the cold forging end face teeth are arranged at the bottom thickness of the warm forging bell housing blank, graphite is easy to accumulate at the bottom thickness of the warm forging bell housing blank, the bottom thickness of the warm forging bell housing blank is locally uneven, and the cold forging forming surface quality of the end face teeth is affected. The bottom thickness of the blank of the warm forging bell housing is controlled to be within +/-1 mm, so that the center distance of the end face teeth formed by the cold forging of the end face teeth is unstable. The tooth shape is not enough when the end face teeth are extruded, and the blank shape before the end face teeth are extruded needs to be designed.

Therefore, it is necessary to provide a new technical solution.

Disclosure of Invention

In order to solve the technical problems in the prior art, the utility model discloses a bell housing blank before cold forging forming, which comprises the following specific technical scheme:

the utility model provides a blank of a bell housing before cold forging forming, which comprises a bell housing main body and an output shaft fixedly connected with the bell housing main body,

the end face of the bell housing main body, which is connected with the output shaft, is provided with a tooth extrusion groove and a forming surface, the tooth extrusion groove is arranged around the output shaft, and the forming surface is outwards scattered from the outer edge of the tooth extrusion groove to form a shape with a low inside and a high outside.

Preferably, the forming surface has an angle of 6.5 ° with the inner end surface of the bell housing body.

Preferably, the extruded tooth grooves and the molding surface are formed by turning by a machine tool.

The utility model has the following beneficial effects:

1. the bell housing blank before cold forging forming can improve the surface quality of the cold forging end face teeth, improve the dimensional accuracy and ensure sufficient extrusion of the end face teeth.

2. The bell-shaped shell blank before cold forging provided by the utility model is characterized in that the external longitudinal direction of the extruded teeth is provided with an angle, external extruded teeth deformation materials are removed, the bottom thickness part is in an upsetting state in the cold forging extruded teeth deformation process, the outermost end of extruded teeth deformation overflows materials, part of materials are removed from the external extruded teeth front vehicle shape, the external upsetting of the extruded teeth deformation end face teeth can be compensated, and finally, the better end face teeth shape can be obtained.

3. The bell shell blank before cold forging provided by the utility model has the advantages that the concave core part material is less, the external material is more, and the core part and the outside are simultaneously shaped when the cold forging extrusion teeth are deformed, so that the product requirement is met.

4. The bell housing blank before cold forging provided by the utility model has the advantages that the working procedure efficiency of forging end face teeth is improved, the rejection rate is reduced, and the productivity is improved.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view of a cold-forged blank for a bell housing according to an embodiment of the present utility model.

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

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The utility model discloses a blank of a bell housing before cold forging forming, referring to fig. 1 and 2, comprising a bell housing main body 1 and an output shaft 2 fixedly connected with the bell housing main body 1. The end face of the bell housing main body 1 connected with the output shaft 2 is provided with a tooth extrusion groove 11 and a forming surface 12, the tooth extrusion groove 11 is arranged around the output shaft 2, and the forming surface 12 diverges outwards from the outer edge of the tooth extrusion groove 11 to form a shape with the inner part being low and the outer part being high.

The angle between the molding surface 12 and the inner end surface of the bell housing body 1 is 6.5 °.

The extruded tooth grooves 11 and the molding surface 12 are formed by turning.

In fig. 2, T is the depth of the tooth extrusion groove 11, and the effect is to avoid the tooth extrusion mold, so long as the groove depth does not interfere with the mold. The angle A and the diameter D1 are used for controlling the sizes of the inner diameter and the angle of the end face teeth after tooth extrusion. The angle B, C and the diameter D2 are used for controlling the outer diameter and the shape of the end face tooth after tooth extrusion, meanwhile, the angle C is the included angle of the inner end face of the bell housing main body 1, which is the most critical core size, directly influences the forming of the end face tooth and the plumpness of the end face tooth, and in multiple times of form simulation, the angle c=6.5 DEG is the optimal tooth extrusion deformation angle, and meanwhile, in practice, the angle c=6.5 DEG also has a good verification effect. The section length L has the function of obtaining the requirement on the size of the center distance H between the spherical center of the inner cavity and the end face teeth during the optimal tooth extrusion forming. The diameters D1, D2 also control the tooth width dimension of the face teeth.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art may combine and combine the different embodiments or examples described in this specification.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications and alternatives to the above embodiments may be made by those skilled in the art within the scope of the utility model.

Claims

1. A blank for a cold-forging bell housing, characterized by comprising a bell housing main body and an output shaft fixedly connected with the bell housing main body,

2. The pre-cold-forging bell housing blank according to claim 1, wherein said forming surface forms an angle of 6.5 ° with an inner end surface of said bell housing body.

3. The pre-cold-forged bell housing blank of claim 1 wherein the tooth grooves and the forming surfaces are both machine-turned.