CN205217892U - Spline pipe turns over and crowds drift - Google Patents

Abstract

The utility model relates to a spline pipe turns over and crowds drift, it includes drift root, nose of punch and is lieing in first transition portion between drift root and the nose of punch, first drift portion, second transition portion, second drift portion and land portion, first transition portion, first drift portion, second transition portion, second drift portion and land portion are certainly drift root to nose of punch sets gradually, land portion is certainly second drift portion to the circular arc portion of nose of punch transition. The utility model discloses a spline pipe turns over and crowds drift, its sharp land portion with prior art become the radius for R's circular arc portion, and the crowded drift of turning over is become by the face contact with forging area of contact and is similar to the line contact, very big have reduced area of contact, have reduced frictional force to have avoided the easy sticking head of forging, drift easy -to -draw hair phenomenon.

Description

A kind of splined tube instead squeezes drift

Technical field

The utility model relates to precision metal forging field, and particularly a kind of splined tube instead squeezes drift.

Background technology

Refer to Fig. 1 and Fig. 2, it is the structural representation of splined tube cold forging part 100, and Fig. 2 is the schematic top plan view of Fig. 1.Refer to Fig. 3 and Fig. 4, it is the structural representation of the anti-crowded drift of splined tube of cold forging part in shop drawings 1 in prior art, and Fig. 4 is the enlarged diagram in A portion in Fig. 3.As shown in Figure 3 and Figure 4, traditional splined tube instead squeezes drift, its land portion 1 for width be the work strip of about 3mm, because spline teeth partial circumference is larger, S (contact area)=L (profile of tooth girth) * H (margin width), described anti-land portion 1 contact area of squeezing drift 100 causes greatly frictional force large, easily causes: when 1. instead squeezing drift backhaul, forging is bonded on drift, and drift is scrapped; 2. drift plucking, need grind reparation.

Reduce friction and will reduce the contact area of land, S (contact area)=L (profile of tooth girth) * H (margin width), profile of tooth girth is fixing, and what do is exactly reduce margin width.

Therefore, be necessary that the technical scheme proposing a kind of improvement solves the problems referred to above.

Utility model content

The purpose of this utility model is to provide a kind of splined tube instead to squeeze drift, the straight line land portion of prior art is become the arc sections that radius is R by it, anti-drift and the forging contact area of squeezing is contacted to become from face and is similar to linear contact lay, reduces contact area greatly, reduces frictional force and avoid forging easy sticking head, the easy plucking phenomenon of drift.

In order to solve the problem, the utility model provides a kind of splined tube and instead squeezes drift, it is characterized in that: it comprises drift root, nose of punch and in the First Transition portion between described drift root and nose of punch, the first punch, the second transition part, the second punch and land portion, described First Transition portion, the first punch, the second transition part, the second punch and land portion set gradually to nose of punch from described drift root

Described land portion is the arc sections from described second punch to described nose of punch transition.

As the utility model one preferred embodiment, the radius of described arc sections is 2-5mm.

As the utility model one preferred embodiment, the radius R of described arc sections is 3mm.

The beneficial effects of the utility model: compared with prior art, splined tube of the present utility model instead squeezes drift, original straight line land portion is become the arc sections that radius is R by it, contact area reduces, frictional force reduces, solve original forging sticking head, drift plucking phenomenon, improve die life, saved drift reparation change man-hour, saved production cost.

Accompanying drawing explanation

In order to be illustrated more clearly in the technical scheme of the utility model embodiment, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.Wherein:

Fig. 1 is a kind of structural representation of splined tube cold forging part;

Fig. 2 is the schematic top plan view of Fig. 1;

Fig. 3 is the structural representation of the anti-crowded drift of splined tube of cold forging part in shop drawings 1 in prior art;

Fig. 4 is the enlarged diagram in A portion in Fig. 3

Fig. 5 is the structural representation that the utility model splined tube instead squeezes drift;

Fig. 6 is the enlarged diagram in B portion in Fig. 5.

Detailed description of the invention

For enabling above-mentioned purpose of the present utility model, feature and advantage become apparent more, are described in further detail the utility model below in conjunction with the drawings and specific embodiments.

Alleged herein " embodiment " or " embodiment " refers to special characteristic, structure or the characteristic that can be contained at least one implementation of the utility model.Different local in this manual " in one embodiment " occurred not all refers to same embodiment, neither be independent or optionally mutually exclusive with other embodiments embodiment.

Refer to Fig. 5 and Fig. 6, Fig. 5 is the structural representation that the utility model splined tube instead squeezes drift; Fig. 6 is the enlarged diagram in B portion in Fig. 5.As shown in FIG. 5 and 6, described splined tube instead squeezes drift 2, it comprises drift root 201, nose of punch 207 and in First Transition portion 202, first punch 203, second transition part 204, second punch 205 between described drift root 201 and nose of punch 207 and land portion 206, and described First Transition portion 202, first punch 203, second transition part 204, second punch 205 and land portion 206 set gradually from described nose of punch 201 to nose of punch 207.Described land portion 296 is the arc sections from described second punch 205 to the transition of described nose of punch 207.

The radius R of described arc sections is 2-5mm.In a preferred embodiment, the radius R of described arc sections is 3mm.Reduce friction and will reduce the contact area of land, S (contact area)=L (profile of tooth girth) * H (margin width), profile of tooth girth is fixing, what do is exactly reduce margin width, drift of the present utility model, and its land portion is arc-shaped, when counter squeezing, this arc sections makes when drift instead squeezes, and the contact portion in land portion, close to linear contact lay, reduces contact area.

Splined tube of the present utility model instead squeezes drift, original straight line land is changed to R circle land, contact area reduces, and frictional force reduces, solve original forging sticking head, drift plucking phenomenon, improve die life, saved drift reparation change man-hour, saved production cost.

Above-mentioned explanation fully discloses detailed description of the invention of the present utility model.It is pointed out that the scope be familiar with person skilled in art and any change that detailed description of the invention of the present utility model is done all do not departed to claims of the present utility model.Correspondingly, the scope of claim of the present utility model is also not limited only to previous embodiment.

Claims (3)

1. a splined tube instead squeezes drift, it is characterized in that: it comprises drift root, nose of punch and in the First Transition portion between described drift root and nose of punch, the first punch, the second transition part, the second punch and land portion, described First Transition portion, the first punch, the second transition part, the second punch and land portion set gradually to nose of punch from described drift root

Described land portion is the arc sections from described second punch to described nose of punch transition.

2. splined tube according to claim 1 instead squeezes drift, it is characterized in that: the radius R of described arc sections is 2-5mm.

3. splined tube according to claim 2 instead squeezes drift, it is characterized in that: the radius R of described arc sections is 3mm.