CN102658319B

CN102658319B - Four-die ultrasonic incremental extruding rolling compound molding apparatus for spline, and technology thereof

Info

Publication number: CN102658319B
Application number: CN201110434048.XA
Authority: CN
Inventors: 赵升吨; 李泳峄; 孙振宇; 张晨阳; 张超
Original assignee: Xian Jiaotong University
Current assignee: Xian Jiaotong University
Priority date: 2011-12-16
Filing date: 2011-12-16
Publication date: 2014-05-28
Anticipated expiration: 2031-12-16
Also published as: CN102658319A

Abstract

A spline four-mold ultrasonic incremental extrusion-rolling compound forming device and process, the device includes a front center and a mold spline integrated center, and the front center and the mold spline integrated center clamp the workpiece, along the circumferential direction of the workpiece at 90°, etc. There are four incremental extrusion-rolling compound forming dies in the space array. The spline section on the top of the mold spline is integrated with the incremental extrusion-rolling compound forming die. The end is axially inserted into the ultrasonic vibration device; the process is to clamp the workpiece first, and then perform axial ultrasonic vibration on the workpiece. Here, the ultrasonic incremental extrusion-rolling compound forming of the spline on the workpiece is completed by four incremental extrusion-rolling compound forming dies and the axially connected ultrasonic vibration device, and finally the material is unloaded. The present invention has a spline Small forming force, high forming precision and surface quality, high production efficiency, wide processing range and other advantages.

Description

A kind of spline ultrasonic increment type extruding rolling compound molding device of four moulds and technique

Technical field

The invention belongs to advanced material forming technique field, be specifically related to a kind of spline ultrasonic increment type extruding rolling compound molding device of four moulds and technique.

Background technology

Spline is in mechanical system, to be used between transmitter shaft and axle the part of motion and moment of torsion, splined is high as a kind of linking intensity, compact conformation, connecting mode that reliability is high, be widely used in numerous machinery industries, such as space flight and aviation, automobile, tractor, boats and ships, lathe, engineering machinery etc.

Along with the fast development of auto industry, the swift and violent increase of the demand of spline and instructions for use improve constantly, and the processing technology to conventional spline and equipment have proposed new challenge.The processing technology of spline is mainly divided into traditional machining and Plastic Forming processing, traditional spline cutting technology exists that machining intensity is high, productivity ratio is low, mechanical performance and the shortcoming such as surface quality is poor, and Plastic Forming processing technology belongs to ELEMENTARY INTRODUCTION TO NON category, there is the plurality of advantages such as production efficiency is high, stock utilization is high, good product performance, become gradually the main flow processing technology of involute spline.At present the Plastic Forming processing technology of spline mainly contains extruding, tempers and three kinds of rollings, and these three kinds of techniques all exist obvious deficiency, first in extrusion process, spline plastic force is large, easily produce the thick phenomenon of pier, die wear is serious, be not suitable for processing thin and long shafts spline, processing spline modulus gear is less.Secondly for the technique of tempering, Mold Making difficulty and versatility are poor, can not process multidiameter class spline part, need the special spline former of tempering.Finally, for technique for rolling, also there is mould installation and debugging difficulty, shaping spline modulus and the limited problem of the number of teeth.

Ultrasonic vibration Metal Forming comes from eighties of last century Austria's fifties scientist's a metal tensile test the earliest, refers to, in the Plastic Forming processing of metal, assist and apply ultrasonic vibration, with the technical process of the technological effect that is improved, raising forming quality.The relative conventional metals plastic forming process of ultrasonic vibration Metal Forming it has been generally acknowledged that and has the following advantages: reduce plastic force; Reduce metal flow stress; Reduce the friction between mould and workpiece; Expand the metal material Plastic Forming range of work, improve metal material plastic forming ability; Can obtain good product surface quality and higher dimensional accuracy.At present, due to the plurality of advantages of ultrasonic vibration Metal Forming, numerous scholars have carried out research widely to this technique, be applied to a lot of production occasions and obtained satisfied effect, such as ultrasonic drawing, ultrasonic punching press, ultrasonic extruding etc., but also ultrasonic Metal Forming technology is not applied in the plastic working technique of spline.

Summary of the invention

In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of spline ultrasonic increment type extruding rolling compound molding device of four moulds and technique, spline plastic force is little, can processing thin and long shafts and large modulus spline class part, have advantages of that forming accuracy and surface quality are high, production efficiency is high, the range of work is wide, highly versatile.

In order to achieve the above object, the technical scheme that the present invention takes is:

The ultrasonic increment type extruding of a kind of spline four mould rolling compound molding device; comprise front top 3 and be mated the mould spline integrated top 4 of clamping work pieces 2; along four the increment type extruding rolling composite forming dies 1 that are provided with of 90 ° of equidistant arrays of workpiece 2 circumferencial directions; spline segment c on mould spline integrated top 4 and the 1 intermeshing transmission of increment type extruding rolling composite forming die, integrated top 4 the rearward end of mould spline axially seals in ultrasonic vibration installation 5.

The ultrasonic increment type extruding of a kind of spline four mould rolling combined forming process, comprises the following steps:

I), clamping workpiece 2, workpiece 2 by front top 3 and mould spline integrated top 4 clamp, it is tangent that theoretical reference circle and the increment type that guarantees workpiece 2 pushes the reference circle of rolling composite forming die 1;

II), workpiece 2 is carried out to axial ultrasonic vibration, workpiece 2 is realized axial ultrasonic vibration by ultrasonic vibration installation 5 work that axially seal in, and vibration frequency is 20KHz～25KHz, and amplitude is 0.005mm～0.015mm;

III), start synchronous rotating in same direction along four increment type extruding rolling composite forming dies 1 of 90 ° of equidistant arrays of workpiece 2 circumferencial directions, spline segment c on mould spline integrated top 4 and the 1 intermeshing transmission of increment type extruding rolling composite forming die, realize workpiece 2 and have corresponding path of contact speed with before 1 contact of increment type extruding rolling composite forming die, the range of speeds of increment type extruding rolling composite forming die 1 is 40RPM～100RPM;

IV), workpiece 2 by front top 3 and mould spline integrated top 4 carry out axial feed when clamping, the ultrasonic increment type extruding rolling combined shaping that is completed workpiece 2 upper splines by four increment type extruding rolling composite forming dies 1, the feed speed of workpiece 2 is 1mm/sec～3mm/sec;

V), ultrasonic vibration installation 5 quits work, workpiece 2 by front top 3 and mould spline integrated top 4 clamp and oppositely exit, discharging simultaneously.

The present invention has the following advantages:

1, adopt four increment type extruding rolling composite forming dies, four moulds in space along 90 ° of equidistant arrays of axis of workpiece, on increment type extruding rolling composite forming die, each tooth synchronously radially hits respectively workpiece continuously, forming efficiency is high, workpiece profile of tooth is because radial plastic deformation accumulative total produces, the spline flank of tooth exist residual compressive stress and metal structure fiber intensive, thereby spline fatigue resistance is higher, surface quality and serviceability better, the symmetrical effect of four direction makes workpiece stressed more stable, making a concerted effort is zero, and balance is better.In addition because spline belongs to increment type extruding rolling combined shaping, therefore shaping axial force and rolling power are little, can machining large-modulus spline, die life is high.

2, in workpiece axial feeding system, axially seal in ultrasonic vibration, the increment type of having realized workpiece pushes in rolling combined shaping process and applies axial vibration, improves the plasticity of workpiece material, improves the andfrictional conditions between workpiece and mould, make plastic force less, surface quality is higher.

Accompanying drawing explanation

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

Fig. 2 is increment type extruding rolling composite forming die of the present invention 1 layout.

Fig. 3 is integrated top 4 schematic diagrames of mould spline of the present invention.

Fig. 4 is increment type extruding rolling composite forming die of the present invention 1 front view.

Fig. 5 is increment type extruding rolling composite forming die of the present invention 1 axonometric drawing.

The specific embodiment

Below in conjunction with accompanying drawing, the present invention is described in detail.

With reference to Fig. 1; the ultrasonic increment type extruding of a kind of spline four mould rolling compound molding device; comprise front top 3 and be mated the mould spline integrated top 4 of clamping work pieces 2; with reference to Fig. 2; along four the increment type extruding rolling composite forming dies 1 that are provided with of 90 ° of equidistant arrays of workpiece 2 circumferencial directions; with reference to Fig. 3, the spline segment c on mould spline integrated top 4 and the 1 intermeshing transmission of increment type extruding rolling composite forming die, integrated top 4 the rearward end of mould spline axially seals in ultrasonic vibration installation 5.

I), with reference to Fig. 1, clamping workpiece 2, workpiece 2 by front top 3 and mould spline integrated top 4 clamp, it is tangent that theoretical reference circle and the increment type that guarantees workpiece 2 pushes the reference circle of rolling composite forming die 1;

II), with reference to Fig. 1, workpiece 2 is carried out to axial ultrasonic vibration, workpiece 2 is realized axial ultrasonic vibration by ultrasonic vibration installation 5 work axially sealing in, vibration frequency is 20KHz～25KHz, amplitude is 0.005mm～0.015mm;

III), with reference to Fig. 1, Fig. 2 and Fig. 3, four increment type extruding rolling composite forming dies 1 along 90 ° of equidistant arrays of workpiece 2 circumferencial directions start synchronous rotating in same direction, spline segment c on mould spline integrated top 4 and the 1 intermeshing transmission of increment type extruding rolling composite forming die, realize workpiece 2 and have corresponding path of contact speed with before 1 contact of increment type extruding rolling composite forming die, the range of speeds of increment type extruding rolling composite forming die 1 is 40RPM～100RPM;

IV), with reference to Fig. 1, Fig. 4 and Fig. 5, workpiece 2 by front top 3 and mould spline integrated top 4 carry out axial feed when clamping, feed speed is 1mm/sec～3mm/sec, first the increment type that is carried out spline by the increment type extruding entering angle section a on four increment type extruding rolling composite forming dies 1 pushes, wherein entering angle angular range is 6 °～9 °, proofread and correct by increment type rolling the increment type rolling that section b carries out workpiece 2 upper splines again and proofread and correct, complete the ultrasonic increment type extruding rolling combined shaping of spline;

Claims

1. A technique for spline four-mold ultrasonic incremental extrusion-rolling composite forming, characterized in that it may further comprise the steps:

Ⅰ) Clamping the workpiece (2), the workpiece (2) is clamped by the front center (3) and the die spline integrated center (4), ensuring the theoretical indexing circle and incremental extrusion rolling of the workpiece (2) The indexing circle of the compound forming mold (1) is tangent;

Ⅱ) Perform axial ultrasonic vibration on the workpiece (2), the workpiece (2) is axially ultrasonically vibrated by the ultrasonic vibration device (5) inserted in the axial direction, the vibration frequency is 20KHz ~ 25KHz, and the amplitude is 0.005mm ~ 0.015 mm;

Ⅲ) Four incremental extrusion-rolling compound forming dies (1) in a 90° equidistant array along the circumferential direction of the workpiece (2) start to rotate synchronously and in the same direction, and the die splines are integrated into the spline segments on the tip (4) (c) Mesh and drive with the incremental extrusion-rolling compound forming die (1) to realize the corresponding meshing line speed before the workpiece (2) contacts with the incremental extrusion-rolling compound forming die (1), Incremental extrusion rolling compound forming die (1) speed range is 40RPM ~ 100RPM;

Ⅳ), the workpiece (2) is clamped by the front top (3) and the mold spline integrated top (4) while being axially fed, and the workpiece is completed by four incremental extrusion rolling composite forming dies (1) (2) Ultrasonic incremental extrusion rolling compound forming of upper spline, workpiece (2) feed speed is 1mm/sec～3mm/sec;

Ⅴ) The ultrasonic vibrating device (5) stops working, and the workpiece (2) is clamped by the front top (3) and the die spline integrated top (4) and withdraws in reverse at the same time, unloading;

The devices required for the forming process include the front center (3) and the die spline integrated center (4) that cooperates with it to clamp the workpiece (2). There are four incremental Extrusion-rolling compound forming die (1), the rear end of die spline integrated top (4) is axially connected into ultrasonic vibrating device (5).