CN103567335B

CN103567335B - Inclined disc type constant speed mould

Info

Publication number: CN103567335B
Application number: CN201210283737.XA
Authority: CN
Inventors: 李迎春; 邱彤; 吴险峰
Original assignee: Individual
Current assignee: Li Yingchun
Priority date: 2012-08-10
Filing date: 2012-08-10
Publication date: 2016-08-24
Anticipated expiration: 2032-08-10
Also published as: CN103567335A

Abstract

A kind of inclined disc type constant speed mould.Die box side is provided with the swash plate of annular spread；There is spindle nose hole at die box opposite side center, and casing bearing is around spindle nose hole annular spread；Roll one end is that radiation is placed on swash plate, and the other end is placed in casing bearing, and forms class conical cavity in die box casing.The present invention has the advantage that as follows: 1. equal by the rotational angular velocity of the steel pipe of hot rolling and the rotational angular velocity of roll；2. the velocity of rotation of any point that steel pipe is rolled on part outer contour is equal with the rotational angular velocity of any on corresponding roll, i.e. drivewheel and follower does pure rolling and nonslipping phenomenon；3. on rotation process axis, the position of any two points does not twist.4. steel pipe is solely subjected to axial force and radial force in the operation of rolling in L length, makes steel pipe be able to jumping-up pulling, does not has relative speed discrepancy with roll.Avoid product in the operation of rolling because of the waste product of the inconsistent generation of angular velocity.

Description

Inclined disc type constant speed mould

Technical field

The present invention relates to a kind of equipment manufacturing automobile drive axle housing, specifically a kind of steel pipe expanding axle housing produces to be used Spindle nose mould inclined disc type constant speed mould.

Background technology

At present, the automobile drive axle housing produced both at home and abroad by the difference of its manufacturing process, can be divided into " casting bridge shell ", " steel plate punched welding bridge hull ", " steel pipe expansion welding spindle nose formula axle housing " three kinds.Wherein steel pipe expansion welding spindle nose formula axle housing is adopted Slot in the middle of 16Mn seamless steel pipe (square tube), 160*160, and with rolling the process of expansion, make Chinese lute hole forming, square tube Two ends cold-extruded becomes pipe, then weld with spindle nose.Steel pipe expansion welding spindle nose formula axle housing matter compared with steel plate punching-welding axle housing Amount has had great changes, although weight is similar with welding bridge hull, but intensity and toughness improves a lot, again because not having steel plate stamping to weld bridge The through welding of shell, product internal stress reduces the most accordingly, improves axle housing integrated carrying ability, is that development prospect is a kind of Medium truck axle shell.But owing to still needing to weld spindle nose in manufacturing process, 16Mn material also cannot be carried by heat treatment Its bearing capacity high and intensity, therefore, this vehicle bridge enters heavy goods vehicles and engineering truck field for no reason at all.In consideration of it, we develop band The steel pipe expansion SA axle housing of spindle nose, this axle housing is without welding spindle nose again, it is not necessary to square tube rolls into pipe, uses 20Mn2 Material, thermally treated crystal grain thinning, eliminate stress, the General Promotion bearing capacity of axle housing, i.e. alleviate vehicle bridge weight, reach The heavy goods vehicles all technical requirement to axle shell.Rolling tool is differential speed type mould at present, and its structure is: at die box Being provided with the bearing of one group of equidistant ring distribution in 1, each bearing axis is parallel to each other, and tapered roller 2 is loaded on bearing and forms one for putting Putting the inner chamber of prefabricated axle shell shaft-head 3, 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 and each taper The bigger diameter end of roller is corresponding (see Fig. 1, Fig. 2).The relation of prefabricated axle shell shaft-head 3 and each tapered roller is as shown in Figure 5, Figure 6.

In Fig. 7, in A A tri-cross section middling speed such as following formulas of B B C C, ω A=ω B=ω C angular velocity is equal (main Driving wheel)

A A:rA ＞ rA ＇ r A rA ＇＞ 1 then ω A ＇=ω A*rA rA ＇

ω A ＇＞ ω A

B B:rB=rB ＇ then ω B=ω B ＇

C C:rC ＜ rC ＇ r C rC ＇＜ 1 then ω C ＇＜ Ω c

As can be seen here, during rolled in spindle nose length, a twisting resistance (moment of torsion) is had to exist all the time.Therefore, in advance When rolling, (with the contacting of roll), each section of contoured surface is in rolling, slides, distorts, alternately axle shell shaft-head 3 processed all the time, The cross section of bridge tube can be caused to fold, twist off time serious.The percent defective that this kind of milling method causes product distortion fracture to cause exists About 30%.

Summary of the invention

In order to overcome the above-mentioned deficiency of prior art, the present invention provides and a kind of improves the qualification rate of spindle nose molding, guarantees The inclined disc type constant speed mould of integral housing product quality.

Technical program of the present invention lies in: die box side is provided with the swash plate of annular spread；In die box opposite side The heart has spindle nose hole, and casing bearing is around spindle nose hole annular spread；Roll one end is that radiation is placed on swash plate, the other end It is placed in casing bearing, and in die box casing, forms class conical cavity.

The annular of swash plate of the present invention composition, the annular of casing bearing composition and the same central axis in spindle nose hole.

Roll of the present invention is truncated cone-shaped, the coning angle of roll round platform place circular cone and the circular cone of axle shell shaft-head to be processed Angle beta is identical.

The angle of roll axis of the present invention and axis, spindle nose hole is equal to the cone angle beta of axle shell shaft-head to be processed.

Roll miner diameter end of the present invention is placed on swash plate, and bigger diameter end is placed on casing bearing.

The swash plate of annular spread of the present invention is arranged on class circular cone type swash plate.

The angle α of class circular cone type swash plate of the present invention is equal to the cone angle beta of axle shell shaft-head to be processed.

Compared with prior art, the present invention has the advantage that as follows: 1. turning by the steel pipe (the most prefabricated axle shell shaft-head) of hot rolling Dynamic angular velocity is equal with the rotational angular velocity of roll；2. the velocity of rotation of any point that steel pipe is rolled on part outer contour with The rotational angular velocity of any on corresponding roll is equal, i.e. drivewheel and follower does pure rolling and nonslipping phenomenon； 3. on rotation process axis, the position of any two points does not twist.4. steel pipe in the operation of rolling in L length only Bear axial force and radial force, make steel pipe be able to jumping-up pulling, there is no relative speed discrepancy with roll.Avoid product in rolling During because of the waste product of the inconsistent generation of angular velocity.The percent defective using the present invention can well solve in the operation of rolling is asked Topic, improves axle housing quality.

Accompanying drawing explanation

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 the schematic diagram of the blank having shut out 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 analyzes sketch.

Fig. 8 is the structural representation of the present invention.

Fig. 9 is the working state figure of the present invention.

Detailed description of the invention

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

Fig. 3 show steel tube blank.

Fig. 4 show 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 analyzes sketch.

In Fig. 8, die box 7 is arranged on the guide shaft 9 of lathe body, and die box 7 side, equipped with oil cylinder 10, is intended by oil cylinder 10 200T powered die box moves horizontally.I.e. it is provided with circular cone type swash plate 6, circular cone type swash plate 6 by oil cylinder 10 side bottom die box 7 Being provided with the swash plate of equidistant ring distribution, die box 7 opposite side has casing bearing, cone-shaped roll 8 one end to be radiation peace Being placed on swash plate, the other end is placed in casing bearing, and formed in die box 7 casing class conical cavity (inner little outside Greatly).The angle α of circular cone type swash plate (angle that i.e. the circular cone side of circular cone type swash plate and base are formed) is equal to axle housing axle to be processed The cone angle beta of head.Roll 8 miner diameter end is placed on swash plate, and bigger diameter end is placed on casing bearing.Cone-shaped roll 8 only with When prefabricated axle shell shaft-head 3 contacts, prefabricated axle shell shaft-head 3 rotarily drives cone-shaped roll 8 and relatively rolls.

Fig. 9 show the present invention inclined disc type mold work state.First, prefabricated axle shell shaft-head 3, in sensing heater, adds Heat is sent in rolling mill main axis hole after 1500 DEG C, is clamped by clamper, main axis, prefabricated axle shell shaft-head 3 concomitant rotation.This Bright keeping straight on along lathe bed guide shaft 9 under the promotion of oil cylinder 10, cone-shaped roll 8 contacts prefabricated axle shell shaft-head 3 front end, cone-shaped roll 8 edge Axis extrude prefabricated axle shell shaft-head 3 and with prefabricated axle shell shaft-head 3 backwards rotation (friction rolling), inventive die is at oil cylinder 10 Continuing to move ahead under promotion, prefabricated axle shell shaft-head 3 continues to be extruded, and prefabricated axle shell shaft-head 3 volume changes, the volume being extruded Flowing to the direction not having active force, inventive die walks to assigned position, and prefabricated axle shell shaft-head 3 has rolled, and oil cylinder 10 moves back Return.Inventive die returns to initial position, and main shaft stops operating, and prefabricated axle shell shaft-head 3 exits, and unclamps clamper, prefabricated axle housing Spindle nose 3 exits, and works complete.

Claims

1. an inclined disc type constant speed mould, it is characterised in that: die box (7) side is provided with the swash plate of annular spread；Mould There is spindle nose hole at case (7) opposite side center, and casing bearing is around spindle nose hole annular spread；Roll (8) one end is that radiation is placed in On swash plate, the other end is placed on casing bearing, and forms class conical cavity in die box (7) casing；Described swash plate The annular of bearing composition, the annular of casing bearing composition are same straight line with the central axis of spindle nose hole three；Described annular is divided The swash plate of cloth is arranged on circular cone type swash plate (6)；The angle i.e. circular cone side of circular cone type swash plate of described circular cone type swash plate (6) The angle α that limit and base are formed is equal to the cone angle beta of axle shell shaft-head to be processed.

Inclined disc type constant speed mould the most according to claim 1, it is characterised in that: described roll (8) is truncated cone-shaped, roll (8) coning angle is identical with the cone angle beta of axle shell shaft-head to be processed.

Inclined disc type constant speed mould the most according to claim 2, it is characterised in that: described roll (8) axis and spindle nose hole The angle of axis is equal to the cone angle beta of axle shell shaft-head to be processed.

4. according to the inclined disc type constant speed mould described in claim 1 or 3, it is characterised in that: described roll (8) miner diameter end is placed on tiltedly On dish bearing, bigger diameter end is placed on casing bearing.