CN202921842U

CN202921842U - Inclined plate type uniform-speed mould

Info

Publication number: CN202921842U
Application number: CN 201220395626
Authority: CN
Inventors: 李迎春; 邱彤; 吴险峰
Original assignee: HUBEI AODE AXLE CO Ltd
Current assignee: Li Yingchun
Priority date: 2012-08-10
Filing date: 2012-08-10
Publication date: 2013-05-08
Anticipated expiration: 2022-08-10

Abstract

The utility model provides an inclined plate type uniform-speed mould. An inclined plate support seat annularly distributed is arranged at one side of a mould box, a shaft head hole is formed in the center of the other side of the mould box, the box body support seat is annularly distributed along the shaft head hole, one end of a roller is radially arranged on the inclined plate support seat, and the other end of the roller is arranged on the box body support seat and forms a cone-similar inner cavity in the mould box body. The inclined plate type uniform-speed mould has the advantages that the speed of a rotation angle of a hot-rolled steel pipe is equal to the speed of a rotation angle of the roller; the rotation speed of any point on an outer contour line of a rolled part of the steel pipe is equal to the rotation speed of a point on a corresponding roller, namely the phenomenon that a driving wheel and a driven wheel make pure rolling movements and are free of sliding; the positions of any two positions on an axis in the rotation process are not reversed; the steel pipe only bear the axial force and the radial force in the L length in the rolling process, the steel pipe is enabled to be upset and pulled, and no relative rotation speed difference exists between the steel pipe and the roller; and waste products caused by inconsistent angle speeds are avoided in the rolling process of products.

Description

Inclined disc type constant speed mould

Technical field

The utility model relates to a kind of equipment of making automobile drive axle housing, specifically a kind of steel pipe expanding axle housing production spindle nose mould-inclined disc type constant speed mould.

Background technology

At present, the automobile drive axle housing of producing both at home and abroad can be divided into three kinds of " casting bridge shell ", " steel plate punched welding axle housing ", " steel pipe expansion welding spindle nose formula axle housings " by the difference of its manufacturing process.Wherein steel pipe expansion welding spindle nose formula axle housing adopts 16Mn seamless steel pipe (square tube), fluting in the middle of 160*160, and with the process that rolls expansion, make the Chinese lute hole forming, and square tube two ends cold-extruded becomes pipe, then welds with spindle nose.Steel pipe expansion welding spindle nose formula axle housing and steel plate stamping weld the axle housing quality of comparing great changes, although weight is similar with the welding axle housing, but intensity and toughness has improved a lot, again because there is no the perforation welding of steel plate stamping weldering axle housing, the product internal stress is corresponding minimizing also, having improved axle housing integrated carrying ability, is development prospect a kind of medium truck axle shell preferably.But owing to still need weld spindle nose in manufacturing process, the 16Mn material also can't improve its bearing capacity and intensity by heat treatment, and therefore, this vehicle bridge enters heavy goods vehicles and engineering truck field for no reason at all.Given this, we develop the steel pipe expansion SA axle housing with spindle nose, this axle housing need not to weld spindle nose again, need not square tube and roll into pipe, adopt the 20Mn2 material, through the heat treatment crystal grain thinning, eliminate stress, General Promotion the bearing capacity of axle housing, namely alleviated vehicle bridge weight, reach heavy goods vehicles to all technical requirement of axle shell.Rolling tool is the differential speed type mould at present, its structure is: be provided with the bearing that one group of equidistant ring distributes in die box 1, each bearing axis is parallel to each other, and tapered roller 2 is loaded on bearing and forms one for the inner chamber of placing prefabricated axle shell shaft-head 3, and the bigger diameter end of inner chamber is corresponding with the miner diameter end of each tapered roller; The miner diameter end of inner chamber corresponding with the bigger diameter end of each tapered roller (seeing Fig. 1, Fig. 2).Relation such as Fig. 5, shown in Figure 6 of prefabricated axle shell shaft-head 3 and each tapered roller.

In Fig. 7, A-A B-three of B C-C cross section middling speed such as following formula in ω A=ω B=ω C angular speed equate (driving wheel)

A-A:rA＞rA ＇ r A ∕ rA ＇＞1 ω A ＇=ω A*rA ∕ rA ＇

ωA＇＞ωA

B-B:rB=rB ＇ is ω B=ω B ＇

C-C:rC＜rC ＇ r C ∕ rC ＇＜1 ω C ＇＜Ω c

This shows on spindle nose length, have all the time a twisting resistance (moment of torsion) to exist in being rolled process.Therefore, prefabricated axle shell shaft-head 3 (in the contacting of roll) each section contoured surface when rolling is in all the time rolling, slip, distortion, hockets, and can cause the cross section of bridge tube to fold when serious, twist off.This kind milling method causes percent defective that product distortion fracture causes in 30% left and right.

Summary of the invention

In order to overcome the above-mentioned deficiency of prior art, the utility model provides a kind of qualification rate that improves the spindle nose moulding, guarantees the inclined disc type constant speed mould of integral housing product quality.

The technical solution of the utility model is: die box one side is provided with the swash plate bearing of annular spread; There is the spindle nose hole at die box opposite side center, and the casing bearing distributes around spindle nose orifice ring shape; Roll one end is radiation and is placed on the swash plate bearing, and the other end is placed in the casing bearing, and forms the class conical cavity in the die box casing.

The annular that the annular that swash plate bearing described in the utility model forms, casing bearing form and spindle nose hole three's central axis are positioned at same straight line.

Roll described in the utility model is truncated cone-shaped, and the cone angle beta of roll coning angle and axle shell shaft-head to be processed is identical.

The angle of roll described in the utility model axis and axis, spindle nose hole equals the cone angle beta of axle shell shaft-head to be processed.

Roll miner diameter end described in the utility model is placed on the swash plate bearing, and bigger diameter end is placed on the casing bearing.

The swash plate bearing of annular spread described in the utility model is arranged on class circular cone type swash plate.

The angle α of class circular cone type swash plate described in the utility model equals the cone angle beta of axle shell shaft-head to be processed.

Compared with prior art, the utlity model has advantage as follows: 1. equated with the rotational angular velocity of roll by the rotational angular velocity of the steel pipe of hot rolling (being prefabricated axle shell shaft-head); 2. the rotational angular velocity of any on the steel pipe velocity of rotation of being rolled any point on the part outer contour and corresponding roll equates, namely driving wheel and follower are done pure rolling and nonslipping phenomenon; 3. the position of any two points does not twist on the rotation process axis.4. steel pipe only bears axial force and radial load on L length in the operation of rolling, makes steel pipe be able to the jumping-up pulling, there is no relative speed discrepancy with roll.Avoided product waste product because of angular speed inconsistent generation in the operation of rolling.Employing the utility model can well solve the percent defective problem in the operation of rolling, improves the axle housing quality.

Description of drawings

Fig. 1 is the structural representation of prior art.

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

Fig. 3 is the schematic diagram of steel tube blank.

Fig. 4 is for shutting out the schematic diagram of the blank of spindle nose.

Fig. 5 is the working state figure of prior art.

Fig. 6 is the side view of Fig. 5.

Fig. 7 is that rotating speed is analyzed sketch.

Fig. 8 is structural representation of the present utility model.

Fig. 9 is working state figure of the present utility model.

The specific embodiment

It is the rolling tool of prior art------differential speed type mould shown in Fig. 1, Fig. 2.In figure, die box 1, tapered roller 2, prefabricated axle shell shaft-head 3, oil cylinder 4, guide rail 5.

Figure 3 shows that steel tube blank.

Figure 4 shows that prefabricated axle shell shaft-head 3.

In Fig. 5, Fig. 6, die box 1, tapered roller 2, prefabricated axle shell shaft-head 3, oil cylinder 4, guide rail 5.

Fig. 7 is that rotating speed is analyzed sketch.

In Fig. 8, die box 7 is arranged on the guide shaft 9 of lathe body, and die box 7 one sides are equipped with oil cylinder 10, is intended moving horizontally at 200T powered die box by oil cylinder 10.Die box 7 bottoms namely are provided with circular cone type swash plate 6 by oil cylinder 10 sides, circular cone type swash plate 6 is provided with the swash plate bearing that equidistant ring distributes, die box 7 opposite sides have the casing bearing, cone-shaped roll 8 one ends are radiation and are placed on the swash plate bearing, the other end is placed in the casing bearing, and forms the class conical cavity (inner little outer large) in die box 7 casings.The angle α of circular cone type swash plate (being the formed angle of circular cone side and base of circular cone type swash plate) equals the cone angle beta of axle shell shaft-head to be processed.Roll 8 miner diameter ends are placed on the swash plate bearing, and bigger diameter end is placed on the casing bearing.Only with prefabricated axle shell shaft-head 3 contact the time, prefabricated axle shell shaft-head 3 rotarily drives cone-shaped roll 8 and relatively rolls cone-shaped roll 8.

Figure 9 shows that the inclined disc type mold work state of the utility model.At first, prefabricated axle shell shaft-head 3 is sent in the rolling mill main axis hole after being heated to 1500 ℃ in induction heater, is held device and clamps, and main shaft rotates, and prefabricated axle shell shaft-head 3 rotates thereupon.The utility model is kept straight on along lathe bed guide shaft 9 under the promotion of oil cylinder 10, cone-shaped roll 8 prefabricated axle shell shaft-head 3 front ends of contact, cone-shaped roll 8 along the prefabricated axle shell shaft-head 3 of axis extruding and with prefabricated axle shell shaft-head 3 backwards rotation (friction rolling), the utility model mould continues to move ahead under the promotion of oil cylinder 10, prefabricated axle shell shaft-head 3 continues to be extruded, prefabricated axle shell shaft-head 3 volumes change, the volume that is extruded flows to the direction that there is no active force, the utility model mould walks to assigned position, rolling the completing of prefabricated axle shell shaft-head 3, oil cylinder 10 is return.The utility model mould is got back to initial position, and main shaft stops operating, and prefabricated axle shell shaft-head 3 withdraws from, and unclamps clamper, and prefabricated axle shell shaft-head 3 withdraws from, and works complete.

Claims

1. inclined disc type constant speed mould, it is characterized in that: die box (7) one sides are provided with the swash plate bearing of annular spread; There is the spindle nose hole at die box (7) opposite side center, and the casing bearing distributes around spindle nose orifice ring shape; Roll (8) one ends are radiation and are placed on the swash plate bearing, and the other end is placed in the casing bearing, and form the class conical cavity in die box (7) casing.

2. inclined disc type constant speed mould according to claim 1 is characterized in that: the annular that the annular that described swash plate bearing forms, casing bearing form and spindle nose hole three's central axis are positioned at same straight line.

3. inclined disc type constant speed mould according to claim 1 and 2 is characterized in that: described roll (8) is truncated cone-shaped, and the cone angle beta of roll (8) coning angle and axle shell shaft-head to be processed is identical.

4. inclined disc type constant speed mould according to claim 3, it is characterized in that: the angle of described roll (8) axis and axis, spindle nose hole equals the cone angle beta of axle shell shaft-head to be processed.

5. according to claim 1 or 4 described inclined disc type constant speed moulds, it is characterized in that: described roll (8) miner diameter end is placed on the swash plate bearing, and bigger diameter end is placed on the casing bearing.

6. inclined disc type constant speed mould according to claim 1, it is characterized in that: the swash plate bearing of described annular spread is arranged on class circular cone type swash plate (6).

7. inclined disc type constant speed mould according to claim 6, it is characterized in that: the angle α of described class circular cone type swash plate (6) equals the cone angle beta of axle shell shaft-head to be processed.