CN202725907U

CN202725907U - Cold ring-rolling die for outer ring of double-row bearing

Info

Publication number: CN202725907U
Application number: CN 201220319205
Authority: CN
Inventors: 廖春惠; 刘梅华; 利义旭
Original assignee: GUANGDONG SHAOZHU GROUP CO Ltd
Current assignee: GUANGDONG SHAOZHU GROUP CO Ltd
Priority date: 2012-07-03
Filing date: 2012-07-03
Publication date: 2013-02-13
Anticipated expiration: 2022-07-03

Abstract

The utility model discloses a cold ring-rolling die for an outer ring of a double-row bearing. The cold ring-rolling die comprises a mandrel, a ring-rolling wheel, and a ring-rolling forged piece installed between the mandrel and the ring-rolling wheel. According to the utility model, the section of the mandrel is reduced by 1.5-2mm in the length direction and reduced by 1-2mm in the diameter direction, and the depth of the section of the rolling wheel is basically equal to the wall thickness of the forged piece, so as to ensure no burrs caused by the reason that materials flow to the end surface of the forged piece during ring-rolling due to the wall thickness of the forged piece; and the redundant materials flow to the position where the section of the mandrel is reduced, thus ensuring the evenness of the machining reference of the end surface of the forged piece.

Description

Double-row bearing outer ring cold rolling mould

Technical field

The utility model relates to the cold rolling technical field of a kind of bearing blank, particularly relates to a kind of double-row bearing outer ring cold rolling mould.

Background technology

Double-row bearing is the bearing with two row rolling elements.Double-row bearing is because the columns increase, radial capacity increases, also can bear simultaneously larger bi-directional axial load, therefore usually be applied to gear drive, the hub bearing of heavy vehicle, in the heavy-duty machinery such as hoist engine, crane, be mainly used in bearing footpath, axially connected load effect take radial load as the master.

Because the wall thickness of double-row bearing outer ring is thinner, when rolling, the speed that material flows to end face, with the mandrel of two ends band restriction, material flows out at the gap location of mandrel and rolling wheel profile, forms burr at the two ends of forging, affects the machining benchmark of forging end face.

Summary of the invention

In order to overcome the shortcoming of above-mentioned prior art, the utility model provides a kind of double-row bearing outer ring cold rolling mould, and it can effectively avoid material to the mobile burr that forms of the both ends of the surface of forging, has guaranteed the flatness of forging end face machining benchmark.

The technical scheme that its technical problem that solves the utility model adopts is as follows:

A kind of double-row bearing outer ring cold rolling mould, comprise mandrel, rolling wheel and be installed in this mandrel and the rolling wheel between the rolling forging.Restriction by the mandrel two ends is removed, and bobbin-type face length degree direction is little 1.5 ~ 2mm, and diametric(al) is little 1 ~ 2mm, and the rolling wheel profile degree of depth and forging wall thickness are basically identical.

By technique scheme, the utlity model has following beneficial effect:

Rolling wheel and mandrel are installed on the equipment, the double-row bearing blank is under the relative motion effect of roll milling wheel, mandrel and support wheel, it is thin that the wall of double-row bearing blank is subjected to the spreading part to radially and tangentially flowing forging to be enlarged rolling, material is also to axial flow simultaneously, material to axial flow is subjected to stopping of rolling wheel type groove, flow to axle diameter and do little position, effectively avoid material to the mobile burr that forms of the both ends of the surface of forging, guaranteed the flatness of forging end face machining benchmark.

Description of drawings

Fig. 1 is the structural representation of the utility model double-row bearing outer ring cold rolling mould.

10: forging

20: mandrel

30: the rolling wheel

The specific embodiment

The utility model is described in further detail below in conjunction with accompanying drawing and preferred embodiment.

See also shown in Figure 1ly, a kind of double-row bearing of the present utility model outer ring (blank) cold ring rolling groove comprises mandrel 20, rolling wheel 30, and be installed in forging 10 between mandrel 20 and the rolling wheel 30.

During implementation, relative motion by mandrel 20 and rolling wheel 30 makes forging 10(double-row bearing blank) wall be subjected to the spreading part to radially and tangential flowing, forging 10 is enlarged rolling thin, material is also to axial flow simultaneously, material to axial flow is subjected to rolling to take turns stopping of 30 type grooves, flow to mandrel 20 diameters and do little position, the both ends of the surface that make material can not flow to forging 10 flow and form burr, have guaranteed the flatness of forging 10 end face machining benchmarks.

The utility model is by being little 1.5 ~ 2mm with bobbin-type face length degree direction, diametric(al) is little 1 ~ 2mm, the rolling wheel profile degree of depth and forging wall thickness are basically identical, can be because of the forging wall thickness with assurance, flow of material goes out burr to the forging end face during rolling, and unnecessary flow of material is done little position to the mandrel profile, namely flows to forging by end face inner bore 1.5 ~ 2mm place.

The above, it only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, therefore every technical solutions of the utility model content that do not break away from,, all still belong in the scope of technical solutions of the utility model any simple modification, equivalent variations and modification that above embodiment does according to technical spirit of the present utility model.

Claims

1. double-row bearing outer ring cold rolling mould is characterized in that it comprises: mandrel, rolling wheel and be installed in described mandrel and the rolling wheel between the rolling forging.

2. double-row bearing outer ring cold rolling mould according to claim 1, it is characterized in that: the restriction at described mandrel two ends is removed, and bobbin-type face length degree direction is little 1.5 ~ 2mm, and diametric(al) is little 1 ~ 2mm.

3. double-row bearing outer ring cold rolling mould according to claim 1 is characterized in that: the described rolling wheel profile degree of depth is consistent with rolling forging wall thickness.