CN103846375A

CN103846375A - Gear rack fixture of spline cold extrusion press

Info

Publication number: CN103846375A
Application number: CN201410080265.7A
Authority: CN
Inventors: 凌俊; 杨锋军
Original assignee: Hefei AAM Automotive Driveline and Chassis System Co Ltd
Current assignee: Hefei AAM Automotive Driveline and Chassis System Co Ltd
Priority date: 2014-03-06
Filing date: 2014-03-06
Publication date: 2014-06-11
Anticipated expiration: 2034-03-06
Also published as: CN103846375B

Abstract

The invention relates to a gear rack fixture of a spline cold extrusion press. The gear rack fixture comprises two fixed bases (1) which are correspondingly matched, wherein each fixed base (1) is provided with two wedge-shaped blocks (2) which are correspondingly matched; each fixed base is respectively connected with a gear rack (3); the gear racks (3) are arranged on the corresponding wedge-shaped blocks (2). The gear rack fixture is characterized in that connection cushion blocks (4) are matched and connected between the corresponding wedge-shaped blocks (2) and the gear racks (3). The gear rack fixture has the advantages that a fixture on a spline gear rolling machine is changed, when splines with the same modulus and different tooth numbers are produced, the same spline gear racks can be used for processing, so that the generality of the gear racks is enhanced, the labor intensity is reduced, the tool replacement time is saved, and the equipment cost is lowered.

Description

A kind of tooth bar frock of spline cold extrusion press

Technical field

The present invention relates to a kind of frock of spline cold extrusion press, particularly a kind of tooth bar frock of spline cold extrusion press.

Background technology

Spline cold extrusion press is the usual means of present stage for the production of spline, and it utilizes tooth bar opposing upper and lower to process workpiece.Multiple spline gear rolling is that part rotates between the tooth bar of motion in the opposite direction by the metal of part edge being carried out to a kind of processing technology of continuous profiled.Tooth bar adopts particular design, and each tooth is deeply penetrated in part step by step by the slope section of tooth bar, and then, in the polishing section of tooth bar, part guarantees size and fineness by rotating a few.

Present stage is while being used spline cold extrusion press to process the different numbers of teeth and modulus spline, need to change different tooth bars, its versatility is poor, and the size of tooth bar is long, and weight is large, the labour intensity of changing tooth bar is large, the adjustment time is long, and the manufacturing cost of tooth bar is very large, through extensively retrieval, not yet find comparatively desirable technical scheme.

Summary of the invention

The object of the invention is the poor shortcoming of tooth bar versatility in order to solve present stage spline cold extrusion press, and the tooth bar frock of a kind of spline cold extrusion press proposing.

To achieve these goals, the present invention has adopted following technical scheme:

A kind of tooth bar frock of spline cold extrusion press, comprise the holder of two corresponding matching, on each holder, be provided with two corresponding matching wedge shapes fast, on each holder, also connect respectively a tooth bar, tooth bar is arranged on corresponding wedge shape and goes up soon, it is characterized in that: cushion block is connected between fast and tooth bar in corresponding wedge shape.

On the basis of technique scheme, can there is following further technical scheme:

In a side of the tooth bar adjustment block that is also connected.

Fast and the tooth bar of described holder, wedge shape is prior art, its connected mode does not all change, this device is at the identical modulus of processing, when the spline of the different numbers of teeth, need add cushion block soon and between tooth bar in wedge shape, a side at tooth bar is added adjustment block, and the cushion block of interpolation and the thickness of adjustment block are according to formula H=(RDLO-φ D)/2-SED and L=(L ₁+ L ₂)/2 calculate, wherein:

The upper and lower opening spacing of RDLO---machine; SED---the size of moulding tooth bar initiating terminal;

The diameter of φ D---part before spline moulding; The thickness of H---cushion block; L ₁---the maximum effectively transverse tooth thickness of spline; L ₂---the minimum actual transverse tooth thickness of spline.

The front axle journal diameter of thickness stranding spline general and workpiece of tooth bar is closely related, is adding man-hour, allows the diameter of workpiece to have certain deviation, can be by regulating micrometer adjusting screw further reduce error.

The invention has the advantages that: this device is that the frock of multiple spline gear rolling machine is changed a social system, realize in the time producing the spline of identical modulus, the different numbers of teeth, can use identical spline tooth bar to process, strengthen the versatility of tooth bar, reduce labour intensity, save the time of toolsetting, reduced equipment cost.

Accompanying drawing explanation

Fig. 1 is basic structure schematic diagram of the present invention.

The specific embodiment

As shown in Figure 1, the tooth bar frock of a kind of spline cold extrusion press provided by the invention, comprise the holder 1 of two corresponding matching, be symmetrical arranged two location-plate 1a in the both sides of each holder 1, be provided with a baffle plate 1b in the upper end of each location-plate, on each holder 1, be provided with two corresponding matching wedge shapes fast 2, fast 2 sides of wedge shape contact cooperation with corresponding location-plate 1a respectively, on location-plate 1a, be also connected with micrometer adjusting screw 8, micrometer adjusting screw 8 coordinates with the contacts side surfaces of wedge shape fast 2 below, on each holder 1, also connect respectively a tooth bar 3, the fixed head 3a of tooth bar both sides respectively with corresponding baffle plate 1b corresponding matching, each tooth bar 3 is all arranged in corresponding wedge shape fast 2, on each baffle plate 1b, be provided with a hold-down bolt 7, hold-down bolt 7 and fixed head 3a compression fit, on a baffle plate 1b, also connect bolt 6 therein, bolt 6 coordinates with one of them location, side of tooth bar 3, each tooth bar 3 is fixed on holder by connecting bolt 9 again, it is characterized in that: square cushion block 4 is connected between corresponding wedge shape fast 2 and tooth bar 3, wherein two relative sides of cushion block contact cooperation with corresponding location-plate 1a respectively, in the time producing the different number of teeth, square adjustment block 5 also can also be connected between tooth bar 3 and location-plate 1a, adjustment block is arranged on the another side of the tooth bar relative with bolt 63.

Identical at processing modulus, when the different spline of the number of teeth, use same set of moulding tooth bar, must measure them, to obtain the thickness H of cushion block.During according to machine tooling spline, regulate the computing formula of upper and lower tooth bar position: RDLO=2 × (SED+H)+φ D to calculate thickness H=(RDLO-φ D of cushion block)/2-SED,

Wherein, SED---the size of tooth bar initiating terminal; The upper and lower opening spacing of RDLO---machine is 6 inches; The diameter of φ D---part before spline moulding; The thickness of H---cushion block.

Adjustment block thickness is determined: check the corresponding product drawing of part, by Parameter of spline, obtain the maximum effectively transverse tooth thickness L of spline ₁in the minimum actual transverse tooth thickness L of spline ₂, side is adjusted pad thickness L=(L ₁+ L ₂)/2.

If change even number tooth into by odd number tooth, can there is displacement in the first profile of tooth that upper and lower tooth bar cold extrusion forms, and therefore increases this side adjustment cushion block and form first displacement of holding this profile of tooth.If when the number of teeth is always odd number tooth or even number tooth, does not need to increase this side and adjust cushion block.In order to guarantee after spline moulding, the problem that spline does not misplace, side is adjusted cushion block thickness deviation must be controlled at [+(L ₁+ L ₂)/2 ,-(L ₁+ L ₂)/2].

Operating procedure and method:

A, equipment shutdown;

B, unload two lathe front backplates;

C, unclamp the hold-down bolt of upper and lower tooth bar;

D, unclamp the connecting bolt of upper and lower tooth bar;

E, unclamp the bolt of upper and lower tooth bar;

F, unclamp micrometer adjusting screw, thereby make upper rack fall (and lower tooth bar is raised) to the height that is enough to place cushion block between tooth bar and voussoir;

G, between tooth bar and voussoir, insert cushion block;

H, between tooth bar and side location-plate insert adjust cushion block;

I, tighten the dog screw of upper and lower tooth bar;

J, tighten the connecting bolt of upper and lower tooth bar;

K, tighten the hold-down bolt of upper and lower tooth bar;

L, adjusting micrometer adjusting screw;

M, open the cooling fluid that flows to tooth bar;

N, load onto two lathe apron plates.

Claims

1. the tooth bar frock of a spline cold extrusion press, comprise the holder (1) of two corresponding matching, on each holder (1), be provided with two corresponding matching wedge shapes fast (2), on each holder, also connect respectively a tooth bar (3), it is upper that tooth bar (3) is arranged on corresponding wedge shape fast (2), it is characterized in that: cushion block (4) is connected between corresponding wedge shape fast (2) and tooth bar (3).

2. the tooth bar frock of a kind of spline cold extrusion press according to claim 1, is characterized in that: in a side of tooth bar (3) adjustment block (5) that is also connected.