CN209477194U - A kind of shallow formed punch guaranteeing deep hole forging concentricity - Google Patents

Abstract

The utility model discloses a kind of shallow formed punch for guaranteeing deep hole forging concentricity, the head and tail end head is rushed including integrally formed, it is excessive using the first fillet between the formed punch and tail end head, the punch tip circumferential surface is provided with the conical surface, the end face of the conical surface and the punch tip is excessive using the second fillet, the top surface of the tail end head is provided with protrusion, the height B1 of the conical surface is 38 ~ 42mm, the gradient of the conical surface is C1, the diameter of the end face of the punch tip is A1, the diameter of the formed punch is D1, size relationship is C1=arctan [(D1-A1)/2*B1].By the above-mentioned means, the utility model provides a kind of shallow formed punch for guaranteeing deep hole forging concentricity, there is stable product working axiality supportability in forging process, greatly reduce raw material loss, improve finished product yields.

Description

A kind of shallow formed punch guaranteeing deep hole forging concentricity

Technical field

The utility model relates to forging punches field more particularly to a kind of shallow formed punches for guaranteeing deep hole forging concentricity.

Background technique

Forging is will to generate plastic deformation after the METAL HEATING PROCESSs such as steel under the action of metal forming machinery to have centainly to obtain The processing method of the part of mechanical performance, certain shapes and size.Especially there is in forging valve body and connector etc. the forging of deep hole When, not parallel due to forging upper and lower end face, the reasons such as formed punch is not exclusively overlapped with forging axis, equipment unbalance loading, so that going out Deep inner hole and the concentricity of forging outer diameter there is biggish deviation, when deviation is larger, the inner hole of forging by mechanical plus Pit is still had after work, leads to scrap of the product.Existing method be reduce the punching depth of forging based on practical experience, or Reduce the aperture of punching, guarantees that inner hole can meet size and concentricity requirement by machining.Although doing so can protect Card product normal process comes out, but increases the raw material investment of product, and the machining in later period, and needs to pass through boring Inner hole or the mode of drilling remove the increased raw material in this part, so that machining working hour and cutter loss etc. are increased, Raw material are wasted, entreprise cost is virtually increased.

Utility model content

The utility model mainly solving the technical problems that provide it is a kind of guarantee deep hole forging concentricity shallow formed punch, There is stable product working axiality supportability in forging process, greatly reduce raw material loss, improve finished product yields.

In order to solve the above technical problems, the technical solution that the utility model uses is: providing a kind of guarantee deep hole class The shallow formed punch of forging concentricity, including it is integrally formed rush the head and tail end head, between the formed punch and tail end head using first circle Angle is excessive, and the punch tip circumferential surface is provided with the conical surface, and the end face of the conical surface and the punch tip uses the second fillet mistake Degree, the top surface of the tail end head are provided with protrusion, and the height B1 of the conical surface is 38 ~ 42mm, and the gradient of the conical surface is C1, institute The diameter for stating the end face of punch tip is A1, and the diameter of the formed punch is D1, and size relationship is C1=arctan [(D1-A1)/2* B1]。

The beneficial effects of the utility model are: a kind of shallow punching for guaranteeing deep hole forging concentricity provided by the utility model Head has stable product working axiality supportability in forging process, greatly reduces raw material loss, it is good to improve finished product Product rate.

Detailed description of the invention

It, below will be to required in embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model Attached drawing to be used is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the utility model Example is applied, it for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings Obtain other attached drawings, in which:

Fig. 1 is a kind of process flow of the prior art for the shallow formed punch for guaranteeing deep hole forging concentricity of the utility model Figure；

Fig. 2 is a kind of utilization of a preferred embodiment of the shallow formed punch for guaranteeing deep hole forging concentricity of the utility model The process flow chart that shallow formed punch is realized；

Fig. 3 is a kind of structure of a preferred embodiment of the shallow formed punch for guaranteeing deep hole forging concentricity of the utility model Figure.

Specific embodiment

Below by the technical scheme in the utility model embodiment is clearly and completely described, it is clear that described Embodiment is only a part of the embodiment of the utility model, instead of all the embodiments.Based on the implementation in the utility model Example, all other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to The range of the utility model protection.

As shown in Figure 1-3, the utility model embodiment includes:

A kind of shallow formed punch guaranteeing deep hole forging concentricity, including integrally formed formed punch 1 and tail end head 2, the punching Between first 1 and tail end head 2 excessively using the first fillet 3, the 1 end circumferential surface of formed punch is provided with the conical surface 4, the conical surface 4 and institute The end face 5 for stating 1 end of formed punch is excessive using the second fillet 6, and the top surface of the tail end head 2 is provided with protrusion 7, the conical surface 4 Height B1 is 38 ~ 42mm, and the gradient of the conical surface 4 is C1, and the diameter of the end face 5 of 1 end of formed punch is A1, the formed punch 1 Diameter be D1, size relationship be C1=arctan [(D1-A1)/2*B1].

Specifically, the forging process precedence diagram originally formulated are as follows: bar heating-base-finish-forging, as shown in Figure 1, at end When forging scouring depth hole, there is the overproof problem of concentricity of interior exit orifice in most of forging.

When being adjusted to improved forging process sequence, led as shown in Fig. 2, increasing punching between base and finish-forging two-step The step of to hole.The concentricity of the interior exit orifice of forging is greatly improved, and meets product requirement.

Improved process needs the shallow formed punch 1 using the application, when the shallow formed punch 1 of pilot hole is rushed in design, to guarantee forging Part does not have Fold generation, and the size design of shallow formed punch 1 is the size referring to finish-forging formed punch 1, and carries out adjustment appropriate and come It obtains.Wherein, relative dimensions are as shown in figure 3,1 end diameter A1 of shallow formed punch 1-2 milli bigger than the end diameter A2 of finish-forging formed punch 1 Rice, the length of height B1 have 40 millimeters or so, and gradient C1 calculates gained, calculation formula by formed punch 1 diameter A1, D1 and length B1 For C1=arc tan[(D1-A1)/2B1], diameter D1 and D2 is equal, and angle E1 and E2 is equal, shallowly rush length F1 in 80mm or so, Other shapes and size can refer to the shape of finish-forging formed punch 1 and size is designed.

Resulting beneficial effect is:

1, the adjustment of forging process: increase the work step for rushing pilot hole；

After increasing pilot hole, the Wall-Thickness Difference of forging is reduced, ensure that the concentricity of forging internal-and external diameter；Alleviate forging Weight, save raw material, reduce entreprise cost；Working hour and the cutter loss for reducing subsequent mechanical processing, improve Processing efficiency.

2, the design process and size selection of shallow formed punch 1: the size of shallow formed punch 1 is approximate with the end size of finish-forging formed punch 1 Identical, especially punching hole diameter is identical, can prevent forging from generating faldstool defect, play good guiding role.

In conclusion the utility model provides a kind of shallow formed punch 1 for guaranteeing deep hole forging concentricity, in forging process In have stable product working axiality supportability, greatly reduce raw material loss, improve finished product yields.

The above description is only the embodiments of the present invention, and therefore it does not limit the scope of the patent of the utility model, all Using equivalent structure or equivalent flow shift made by the utility model description, it is applied directly or indirectly in other phases The technical field of pass, is also included in the patent protection scope of the utility model.

Claims (1)

1. a kind of shallow formed punch for guaranteeing deep hole forging concentricity, which is characterized in that the head and tail end head is rushed including integrally formed, Excessive using the first fillet between the formed punch and tail end head, the punch tip circumferential surface is provided with the conical surface, the conical surface and institute The end face for stating punch tip is excessive using the second fillet, and the top surface of the tail end head is provided with protrusion, the height B1 of the conical surface For 38 ~ 42mm, the gradient of the conical surface is C1, and the diameter of the end face of the punch tip is A1, and the diameter of the formed punch is D1, Size relationship is C1=arctan [(D1-A1)/2*B1].