CN102658319A

CN102658319A - Four-die ultrasonic incremental extruding rolling compound molding apparatus for spline, and technology thereof

Info

Publication number: CN102658319A
Application number: CN201110434048XA
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: 2012-09-12
Anticipated expiration: 2031-12-16
Also published as: CN102658319B

Abstract

The invention provides a four-die ultrasonic incremental extruding rolling compound molding apparatus for a spline and a technology thereof. The apparatus comprises a front apex and a die and spline integrated apex . The front apex and the die and spline integrated apex clamp a workpiece tightly. Four incremental extruding rolling compound molding dies are equidistantly arranged in 90 degrees in an array way along a peripheral direction of the workpiece. A spline section of the die and spline integrated apex and the incremental extruding rolling compound molding dies are mutually engaged and transmited, and a back end part of the die and spline integrated apex is axially added in series with an ultrasonic vibration apparatus. The technology steps are that: firstly, the workpiece is clamped; secondly, axial direction ultrasonic vibration is carried out on the workpiece, then the four incremental extruding rolling compound molding dies start to rotate in the same direction synchronously; thirdly, the workpiece is axially fed, and ultrasonic incremental extruding rolling compound molding of the spline on the workpiece is completed by the ultrasonic vibration apparatus that axially added in series and the four incremental extruding rolling compound molding dies; and lastly, material discharging is carried out. The apparatus and technology in the invention have the advantages of small molding force of the spline, high molding precision and surface quality, high production efficiency, large processing range and the like.

Description

Ultrasonic increment type extruding rolling compound molding device of a kind of spline four moulds and technology

Technical field

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

Background technology

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

Along with rapid development of automobile industry, the demand of spline is swift and violent to be increased and instructions for use improves constantly, and the processing technology and the equipment of conventional spline has been proposed new challenge.The processing technology of spline mainly is divided into traditional cut and Plastic Forming processing; Shortcomings such as traditional spline cutting technology exists that cut intensity is high, productivity ratio is low, mechanical performance and surface quality difference; And the Plastic Forming processing technology belongs to the ELEMENTARY INTRODUCTION TO NON category; Have plurality of advantages such as production efficiency height, stock utilization height, good product performance, become the main flow processing technology of involute spline gradually.At present the Plastic Forming processing technology of spline mainly contains extruding, tempers and three kinds of rollings; And these three kinds of technologies all exist tangible deficiency; At first the spline plastic force is big in the extrusion process, is easy to generate the thick phenomenon of pier, and die wear is serious; Be not suitable for the processing thin and long shafts spline, processing spline modulus gear is less.Secondly for the technology of tempering, Mold Making difficulty and versatility are poor, can not process multidiameter class spline part, need the special-purpose spline former of tempering.At last, for technique for rolling, also there are mould Installation and Debugging difficulty, shaping spline modulus and the limited problem of the number of teeth.

The ultrasonic vibration Metal Forming comes from eighties of last century Austria's fifties scientist's a metal tensile test the earliest, refers in the Plastic Forming processing of metal, assist to apply ultrasonic vibration, with the technical process of the technological effect that is improved, raising forming quality.The relative traditional metal 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; The enlarged metal material Plastic Forming range of work improves the metal material plastic forming ability; Can obtain better products surface quality and high dimension precision.At present; Because the plurality of advantages of ultrasonic vibration Metal Forming; Numerous scholars have carried out extensive studies to this technology; Be applied to a lot of effects that a merging has obtained satisfaction of producing, for example 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 ultrasonic increment type extruding rolling compound molding device of a kind of spline four moulds and technology; The spline plastic force is little; Can processing thin and long shafts and big modulus spline class part, have forming accuracy and surface quality height, production efficiency is high, the range of work is wide, the advantage of highly versatile.

In order to achieve the above object, the technical scheme taked of the present invention is:

The ultrasonic increment type extruding of a kind of spline four moulds rolling compound molding device; Before comprising top 3 be mated the mould spline integrated top 4 of clamping work pieces 2; Four the increment type extruding rolling composite forming dies 1 that are provided with along 90 ° of equidistant arrays of workpiece 2 circumferencial directions; Spline segment c on the mould spline integrated top 4 and increment type extruding rolling composite forming die 1 transmission that is meshing with each other, 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 moulds rolling combined forming process may further comprise the steps:

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

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

III), rotate in the same way synchronously along four increment type extruding rolling composite forming dies, 1 beginning of 90 ° of equidistant arrays of workpiece 2 circumferencial directions; Spline segment c on the mould spline integrated top 4 and increment type extruding rolling composite forming die 1 transmission that is meshing with each other; Have corresponding path of contact speed before realizing workpiece 2 and increment type extruding rolling composite forming die 1 contacting, the range of speeds of increment type extruding rolling composite forming die 1 is 40RPM～100RPM;

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

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

The present invention has the following advantages:

1, adopts four increment type extruding rolling composite forming dies; Along 90 ° of equidistant arrays of axis of workpiece, each tooth radially hits workpiece respectively synchronously continuously on the increment type extruding rolling composite forming die in the space for four moulds, and forming efficiency is high; The workpiece profile of tooth is owing to radial plastic deformation accumulative total produces; The spline flank of tooth exists residual compressive stress and metal structure fiber intensive, thereby the spline fatigue resistance is higher, surface quality and serviceability are better, and the effect of four direction symmetry makes workpiece stressed more stable; Making a concerted effort is zero, and balance is better.Because belonging to increment type, spline pushes the rolling combined shaping in addition, so shaping axial force and rolling power are little, but the machining large-modulus spline, die life is high.

2, in feed system, axially seal in ultrasonic vibration at workpiece spindle; Realized applying axial vibration in the increment type extruding rolling combined shaping process of workpiece, improved the plasticity of workpiece material, improved the andfrictional conditions between workpiece and mould; Make plastic force littler, surface quality is higher.

Description of drawings

Fig. 1 is an apparatus structure sketch map of the present invention.

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

Fig. 3 is integrated top 4 sketch mapes of mould spline of the present invention.

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

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

The specific embodiment

Below in conjunction with accompanying drawing the present invention is done detailed description.

With reference to Fig. 1; The ultrasonic increment type of a kind of spline four moulds extruding rolling compound molding device, top 3 is integrated top 4 with the mould spline that is mated clamping work pieces 2 before comprising, with reference to Fig. 2; Four the increment type extruding rolling composite forming dies 1 that are provided with along 90 ° of equidistant arrays of workpiece 2 circumferencial directions; With reference to Fig. 3, the spline segment c on the mould spline integrated top 4 and increment type extruding rolling composite forming die 1 transmission that is meshing with each other, 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 preceding top 3 and mould spline integrated top 4 clamp, guarantee that the theoretical reference circle of workpiece 2 is tangent with the reference circle that increment type pushes rolling composite forming die 1;

II), with reference to Fig. 1, workpiece 2 is carried out axial ultrasonic vibration, workpiece 2 is realized the axial ultrasonics vibration by the ultrasonic vibration installation that axially seals in 5 work, 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 beginning along 90 ° of equidistant arrays of workpiece 2 circumferencial directions is rotated synchronously in the same way; Spline segment c on the mould spline integrated top 4 and increment type extruding rolling composite forming die 1 transmission that is meshing with each other; Have corresponding path of contact speed before realizing workpiece 2 and increment type extruding rolling composite forming die 1 contacting, 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 preceding top 3 and mould spline integrated top 4 carry out axial feed when clamping; Feed speed is 1mm/sec～3mm/sec; Increment type extruding entering angle section a by on four increment type extruding rolling composite forming dies 1 at first carries out the increment type extruding of spline; Wherein the entering angle angular range is 6 °～9 °, proofreaies and correct the increment type rolling correction that section b carries out workpiece 2 upper splines by the increment type rolling again, accomplishes the ultrasonic increment type extruding rolling combined shaping of spline;

Claims

1. the ultrasonic increment type of spline four moulds pushes the rolling compound molding device; Top before comprising (3) and be mated the mould spline integrated top (4) of clamping work pieces (2); It is characterized in that: along four the increment type extruding rolling composite forming dies (1) that are provided with of 90 ° of equidistant arrays of workpiece (2) circumferencial direction, the rearward end of mould spline integrated top (4) axially seals in ultrasonic vibration installation (5).

2. adopt the ultrasonic increment type extruding of described a kind of spline four moulds of claim 1 rolling compound molding device to carry out the technology of combined shaping, it is characterized in that, may further comprise the steps:

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

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

III), rotate in the same way synchronously along four increment type extruding rolling composite forming dies (1) beginning of 90 ° of equidistant arrays of workpiece (2) circumferencial direction; Spline segment (c) on the mould spline integrated top (4) and increment type extruding rolling composite forming die (1) transmission that is meshing with each other; Have corresponding path of contact speed before realizing workpiece (2) and increment type extruding rolling composite forming die (1) contacting, increment type extruding rolling composite forming die (1) range of speeds is 40RPM～100RPM;

Carry out axial feed when IV), workpiece (2) is clamped by preceding top (3) and mould spline integrated top (4); The ultrasonic increment type of being accomplished workpiece (2) upper spline by four increment type extruding rolling composite forming dies (1) pushes the rolling combined shaping, and workpiece (2) feed speed is 1mm/sec～3mm/sec;

V), ultrasonic vibration installation (5) quits work, workpiece (2) is clamped by preceding top (3) and mould spline integrated top (4) and oppositely withdraws from discharging simultaneously.