CN202162325U

CN202162325U - Novel wearable connecting rod roll forging die with long service life

Info

Publication number: CN202162325U
Application number: CN2011202228527U
Authority: CN
Inventors: 李瑞恭; 陈林华
Original assignee: KUNSHAN CHAITAI XINCHENG PRECISION FORGING CO Ltd
Current assignee: KUNSHAN CHAITAI XINCHENG PRECISION FORGING CO Ltd
Priority date: 2011-06-28
Filing date: 2011-06-28
Publication date: 2012-03-14
Anticipated expiration: 2021-06-28

Abstract

The utility model discloses a novel wearable connecting rod roll forging die with long service life, which has a first pass, a second pass, a third pass, a fourth pass and a fifth pass which are formed in a working process that an upper die and a lower die respectively rotate for one circle; the total elongation percentage of rod parts of the five passes is not changed; the elongation percentages of the rod parts of the first pass and the second pass are respectively increased by 8%; the elongation percentage of the rod part of the third pass is decreased by 5%; and the elongation percentage of the rod part of the fourth pass is decreased by 15%. The novel wearable connecting rod roll forging die with the long service life increases four passes to the five passes, and adjusts the different elongation percentage of each pass on the premise that the total elongation percentage of the rod parts of the passes is not changed, thereby improving the service life of the roll forging die.

Description

Novel wear resistant high life connecting rod forge rolling die

Technical field

The utility model relates to a kind of connecting rod forge rolling die, more particularly, relates in particular to a kind of novel wear resistant high life connecting rod forge rolling die.

Background technology

At present the connecting rod forge rolling die has 4 passages, and passage is in the course of work that patrix and counterdie rotate a circle, to form, when working; Its every time deformation rate is higher, has influenced die life, in addition; The material of forge rolling die adopts general hot die steel commonly used; Its trade mark is H13, and mold core hardness is not very high, is merely the life-span that above two kinds of factors have restricted forge rolling die.

The utility model content

The purpose of the utility model is the deficiency to above-mentioned prior art, and a kind of novel wear resistant high life connecting rod forge rolling die that improves the service life of forge rolling die is provided.

The technical scheme of the utility model is achieved in that a kind of novel wear resistant high life connecting rod forge rolling die; Said forge rolling die has first passage, second passage, the 3rd passage, the four-pass that is formed in the course of work that rotates a circle by patrix and counterdie respectively; Also has the 5th passage; The bar portion breaking elongation of five said passages is constant; The bar portion percentage elongation of said first passage, second passage increases by 8% respectively, and the bar portion percentage elongation of said the 3rd passage dwindles 5%, and the bar portion percentage elongation of said four-pass dwindles 15%.

Preferably, the material of said forge rolling die adopts matrix steel 65Nb.

The utility model is increased to five passages with four passages after adopting said structure, under the prerequisite of the total bar portion percentage elongation that does not change passage, adjusts the different expansion and contraction of each passage, thereby makes the service life of having improved forge rolling die; In addition, matrix steel 65Nb replaces the mould steel of traditional H13, has improved wearability greatly, so its die life is higher.

Description of drawings

Below in conjunction with the embodiment in the accompanying drawing the utility model is done further to specify, but do not constitute any restriction the utility model.

Fig. 1 is the front view of first passage of present embodiment;

Fig. 2 is the side view of Fig. 1;

Fig. 3 is the vertical view of Fig. 1;

Fig. 4 is the front view of second passage of present embodiment;

Fig. 5 is the side view of Fig. 4;

Fig. 6 is the vertical view of Fig. 4;

Fig. 7 is the front view of the 3rd passage of present embodiment;

Fig. 8 is the side view of Fig. 7;

Fig. 9 is the vertical view of Fig. 7;

Figure 10 is the front view of the four-pass of present embodiment;

Figure 11 is the side view of Figure 10;

Figure 12 is the vertical view of Figure 10;

Figure 13 is the front view of the 5th passage of present embodiment;

Figure 14 is the side view of Figure 13;

Figure 15 is the vertical view of Figure 13;

Among the figure: the 1-patrix; The 2-counterdie.

The specific embodiment

Below in conjunction with accompanying drawing the preferred embodiment of the utility model is set forth in detail, thereby the protection domain of the utility model is made more explicit defining so that advantage of the utility model and characteristic can be easier to it will be appreciated by those skilled in the art that.

Consult Fig. 1 to shown in Figure 15; A kind of novel wear resistant high life connecting rod forge rolling die; Forge rolling die has first passage, second passage, the 3rd passage, the four-pass that is formed in the course of work that rotates a circle by patrix 1 and counterdie 2 respectively, also has the 5th passage, and the bar portion breaking elongation of five passages is constant; The bar portion percentage elongation of first passage, second passage increases by 8% respectively; The bar portion percentage elongation that the bar portion percentage elongation of the 3rd passage dwindles 5%, the four-pass dwindles 15%, and then the bar portion percentage elongation of the 5th passage also can be calculated thereupon.

Wherein, in fact bar portion percentage elongation is meant the elongation rate to rolled piece to be processed of the preceding relatively a time of back a time, and then the percentage elongation of first passage is the elongation rate to the rolled piece blank.

The bar portion breaking elongation of four passages of the conventional roll forging die of present embodiment is 4.356, and wherein, the bar portion percentage elongation of first passage is 1.64; The bar portion percentage elongation of second passage is that the bar portion percentage elongation of 1.39, the three passages is that the bar portion percentage elongation of 1.47, the four-pass is 1.3; Then calculate through aforementioned proportion; The bar portion percentage elongation of first passage is that the bar portion percentage elongation of 1.7712, the second passages is that the bar portion percentage elongation of 1.5012, the three passages is 1.3965; The bar portion percentage elongation of four-pass is 1.105, is 1.0617 according to the bar portion percentage elongation that calculates the 5th passage then.

Quantity through increasing passage and the percentage elongation that changes bar portion can increase the service life of connecting rod forge rolling die, thereby the anti-wear performance that also can strengthen the connecting rod forge rolling die in addition from the material aspect improves its service life.

The material of the forge rolling die of present embodiment adopts matrix steel 65Nb, and matrix steel 65Nb generally is used for cold-work die, though and our roll forging workpiece temperature at 1000 ℃; The technology that belongs to forge hot character, still, because forge rolling die is that instantaneous line contacts with the roll forging workpiece; The temperature of forge rolling die itself is no more than 300 ℃; Far below the tempering heat treatment and the nitriding temperature of forge rolling die, so we attempt making forge rolling die with matrix steel 65Nb, and its wearability is higher.

Above two measures are combined, and comprehensive life can be brought up to 3 times of former life-span.

Above embodiment is only for explaining the technical conceive and the characteristics of the utility model; Its purpose is to let the people that is familiar with this technology understand the content of the utility model and implements; Can not limit the protection domain of the utility model with this; All equivalences of being done according to the utility model spirit change or modify, and all should be encompassed in the protection domain of the utility model.

Claims

1. novel wear resistant high life connecting rod forge rolling die; Said forge rolling die has first passage, second passage, the 3rd passage, the four-pass that is formed in the course of work that rotates a circle by patrix and counterdie respectively; It is characterized in that: also have the 5th passage, the bar portion breaking elongation of five said passages is constant, and the bar portion percentage elongation of said first passage, second passage increases by 8% respectively; The bar portion percentage elongation of said the 3rd passage dwindles 5%, and the bar portion percentage elongation of said four-pass dwindles 15%.

2. novel wear resistant high life connecting rod forge rolling die according to claim 1 is characterized in that: the material of said forge rolling die adopts matrix steel 65Nb.