CN202037288U

CN202037288U - Roll forging mold of roll forging machine

Info

Publication number: CN202037288U
Application number: CN2011201376466U
Authority: CN
Inventors: 陈莉; 许斌; 邢龙; 张艳丽; 王海文
Original assignee: LIAONING 518 INTERNAL-COMBUSTION ENGINE FITTINGS Co Ltd
Current assignee: LIAONING 518 INTERNAL-COMBUSTION ENGINE FITTINGS Co Ltd
Priority date: 2011-05-04
Filing date: 2011-05-04
Publication date: 2011-11-16
Anticipated expiration: 2021-05-04

Abstract

The utility model discloses a roll forging mold of a roll forging machine, consisting of two to four passes of roll forging molds. The roll forging mold is characterized in that circumferential guide slots are arranged at the centers of cavities in an upper roll centering roll forging mold and a lower roll centering roll forging mold at the second pass and the fourth pass. When entering the second pass of roll forging mold and the fourth passes of roll forging mold, a flat and thin roll forging blank plays the role of better righting and stabilizing the blank. Therefore, the stress at two sides is identical basically when the roll forging blank flows along the length direction, a produced forging piece is prevented from folding effectively, and further the quality is improved, the polishing ratio is reduced, and the production efficiency is improved.

Description

The roll forging mould of forging roll

Technical field

The utility model relates to the roll forging mould of forging roll, as be used for the roll forging mould of connecting rod forging.

Background technology

Forging roll is generally done the four-pass roll forging; for the bigger forging of cross section product moment; as the connecting rod forging; bigger through regular meeting's appearance in roller forging sheet stamping because of preceding reduction in pass; cause forging stock phenomenons such as unstability when following a time roll forging, to occur because of guidance quality is relatively poor; i.e. first road; the drafts in the 3rd road is bigger; the forging stock broad ways is launched; particularly the position that the blank deformation amount is bigger can become flat thin shape; entering second road behind the forging stock half-twist; during the 4th road roll forging mould; because of the relatively poor forging stock unstable phenomenon that occurs of roll forging mould guidance quality; being easy to generate metal flows rapidly along its length and makes a part of metal baffling in another part metal; generation is folding, can cause forging to be scrapped when serious.

The utility model content

The purpose of this utility model is the problem that exists at above-mentioned prior art, and the forging roll forging mould of forging roll is improved, and the forging roll roll forging mould of a kind of guidance quality, good stability is provided.

The roll forging mould of the utility model forging roll is made up of two to four passage roll forging moulds, promptly form by 2-4 group roll forging mould, top roll roll forging mould is installed on the roll shaft, lower roll roll forging mould is installed on the lower roller shaft, it is characterized in that second, offer circumferential gathering sill in the heart in the upper and lower pair roller type roll forging mould internal shape cavity of four-pass, gathering sill a is the circular groove with mould internal shape cavity face arc transition.

The roll forging base shape of flat thin shape is going into second or during four-pass roll forging mould, the height point of base shape enters in the gathering sill, and this moment, gathering sill was equivalent to guide rail, and blank has been played centralizing function preferably.The force-bearing situation basically identical of both sides when the roll forging base flows along its length like this, the stability of blank is strengthened greatly, and the possibility that produces unstability reduces.Because of the guide effect of gathering sill has been arranged, stability is greatly improved the roll forging base in the roll forging process, and the design of pair roller forging stock more becomes to rationalizing.The presentation quality of forging be improved significantly, forging reduces greatly in distortion larger part flaw detection, reconditioning ratio, has also improved production efficiency.

Description of drawings

Fig. 1 is the utility model embodiment Roll forging mouldTwo road forge rolling dies ToolCutaway view, Fig. 2 TheFour road forge rolling dies ToolCutaway view, Fig. 3 are Fig. 1,2 C-C cutaway view, and Fig. 4 is the local Fang Datu of Fig. 1 Fig. 2.

The specific embodiment

The roll forging mould of the utility model forging roll is made up of two to four passage roll forging moulds, promptly form by 2-4 group roll forging mould, top roll roll forging mould 1 is installed on the roll shaft 3, lower roll roll forging mould 2 is installed on the lower roller shaft 4, it is characterized in that offering circumferential gathering sill a in the heart in upper and lower pair roller roll forging mould 1,2 internal shape cavities of second, the 4th passage, gathering sill a is the circular groove with mould internal shape cavity face arc transition.

Claims

1. the roll forging mould of forging roll, form by two to four passage roll forging moulds, promptly form by 2-4 group roll forging mould, top roll roll forging mould is installed on the roll shaft, lower roll roll forging mould is installed on the lower roller shaft, it is characterized in that offering circumferential gathering sill (a) in the heart in the upper and lower pair roller roll forging mould internal shape cavity of second, the 4th passage, gathering sill (a) is the circular groove with mould internal shape cavity face arc transition.