CN101352799B - Occlusion extruding molding method for long axis - Google Patents

Occlusion extruding molding method for long axis Download PDF

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Publication number
CN101352799B
CN101352799B CN2008101961034A CN200810196103A CN101352799B CN 101352799 B CN101352799 B CN 101352799B CN 2008101961034 A CN2008101961034 A CN 2008101961034A CN 200810196103 A CN200810196103 A CN 200810196103A CN 101352799 B CN101352799 B CN 101352799B
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China
Prior art keywords
recipient
occlusion
regular squeeze
occlusion regular
meant
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CN2008101961034A
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Chinese (zh)
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CN101352799A (en
Inventor
徐祥龙
施卫兵
汤小东
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江苏森威精锻有限公司
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Publication of CN101352799A publication Critical patent/CN101352799A/en
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Abstract

The invention provides an occlusion forward extrusion shaping method of a long shaft which relates to a metal plastic shaping technology and belongs to technical field of fine cold-forging shaping of a long shaft part. The technical flow in turn includes that: sawing materials; carrying out annealing, ball blast and phosphorus saponification treatments on the blank of the long shaft; then carrying out occlusion forward extrusion on the blank to finish shaping a step with a large deofrmation amoutn; then carrying out ball blast and phosphorus saponification treatments again, thereby shaping a plurality of steps by a plurality of cold refining and finally obtaining a product which can meet the tissue performance and the size precision demand. When the method provided by the invention is used for carrying out processing on the long shaft, the internal quality of the product is stable; the service life of a die is long; simultaneously the processing cost is low; the processing efficiency is high; the subsequence cutting processing amount is less; the method can meet the demands for batch production.

Description

Occlusion regular squeeze mold method for prolate axis

Technical field

The present invention relates to a kind of metal forming technology, belong to the accurate cold forging forming technical field of longaxones parts.

Background technology

In the accurate cold forging of axial workpiece, often have that some draw ratios are very big, stepped diameters differs bigger many steps axle product.The method of producing this series products at present has two kinds: a kind of is to adopt continuous reducing process, promptly repeatedly little variable just is being extruded into the position, such technology has the advantage of length die life, process stabilizing, but a shortcoming is also arranged simultaneously, because same position is repeatedly pushed repeatedly, therefore cause the explosion of major axis center easily exactly; Second kind is to adopt forward extrusion technology, an i.e. forward extrusion puts in place, the advantage of this technology is when carrying out forward extrusion, material is in three-dimensional stress state, and no center explosion risk, shortcoming are because the draw ratio of part is very big, carry out the material returned when therefore finishing forward extrusion and need very long material returned stroke, simultaneously material returned power is very big, so the push rod unstability often takes place aborning, fracture the problem that workpiece can not move back.

Summary of the invention

The objective of the invention is to overcome above-mentioned defective, provide that a kind of product internal soundness is stable, die life is long, can satisfy the occlusion regular squeeze mold method for prolate axis of batch production requirements.

Technical solution of the present invention is: occlusion regular squeeze mold method for prolate axis, it comprises the saw material, with the major axis blank anneal, ball blast, phospholeum processing, then blank is carried out occlusion regular squeeze, a step finishing maximum deformation quantity is shaped, ball blast, phospholeum processing again, continuous and cold-finish by some roads make many steps be shaped, finally be met the product of structure property, dimension precision requirement.

Described saw material refers to that cutting stock weight is controlled at 1.01~1.02 times of finished weight, and the blanking diameter can not be greater than the finished product maximum gauge.

Described annealing also will be carried out slotted hole and add man-hour after work piece is finished the shaping of major axis occlusion regular squeeze, be meant according to the client requirement control heating-up temperature and the time of product structure property are carried out the isothermal normalizing processing.

Described annealing when work piece is finished the major axis occlusion regular squeeze and is shaped the no slotted hole processing request in back, is meant common spheroidizing.

Described ball blast, phospholeum turn to conventional operation, and mainly being provides lubricating film for follow-up occlusion regular squeeze operation.

Described occlusion regular squeeze operation is meant, adopts the method for occlusion regular squeeze, and that once finishes the maximum deformation quantity step just is extruded into shape.

The method of described occlusion regular squeeze is meant, a long recipient is divided into recipient and following recipient, an inaccessible cylinder is arranged on last recipient, when press ram comes downwards to recipient and contacts with following recipient, provide inaccessible power by inaccessible cylinder, make upper and lower recipient closure, slide block continues descending, cylinder is compressed, upper punch promotes workpiece and carries out just crowded, until slide block move to bottom dead centre finish just crowded, last recipient with the slide block backhaul to top dead-centre, the up workpiece that ejects of push rod.

Described inaccessible cylinder is the elevated pressure nitrogen cylinder.

The mould that the Hardmetal materials that described occlusion regular squeeze operation employing is YG20 with the trade mark is made, described carbide alloy is meant that tungsten carbide is a matrix, cobalt is the material that binding agent is made.

Described many steps are shaped and are meant, according to the shape of major axis part, except that completed maximum variable step was shaped, whenever one to two step was finished the shaping of many steps axle by a cold-finish.

The invention has the beneficial effects as follows: by the occlusion regular squeeze manufacturing process, the forward extrusion of once finishing the maximum variable step of major axis is shaped, and product interior metal streamline is by its shape continuous distributed, dense internal organization, steady quality; By repeatedly cold-finish, finish the shaping of many steps axle then, obtain different hardness, help follow-up machining and gear rolling forming at each step each several part; Adopt the branch mould technology of long recipient simultaneously, solved the push rod destabilization problems, add mold and adopt Hardmetal materials, improved die life, satisfied batch production requirement; Adopt the inaccessible cylinder of high pressure nitrogen, reduced the mould bases manufacturing cost; The present invention simultaneously has also that the processing cost that the common metal plastic forming technology all has is low, working (machining) efficiency is high, the few advantage of follow-up machining amount.

Description of drawings

Fig. 1 is a process chart of the present invention.

Fig. 2 is an occlusion regular squeeze operation schematic diagram of the present invention.

Fig. 3 is embodiment of the invention shape of product change procedure figure.

Among the figure: 1. elevated pressure nitrogen cylinder, 2. go up recipient, 3. play recipient, 4. workpiece, 5. push rod, 6. upper punch, 7. slide block.

The present invention is further described below in conjunction with accompanying drawing 1.

The specific embodiment

Process with Jetta sedan gear-box power shaft is an example, and its technological process is:

1, saw material, selecting diameter is the hot rolling round bar of 37.9 millimeters of φ, and material trademark is 20MnCr5, adjusts cutting length, and Weight control is at 2170~2180 grams;

2, isothermal normalizing, owing to need to bore 10 millimeters of diameter phi on the Jetta sedan gear-box power shaft, and length reaches 300 millimeters deep hole, therefore very tight to finished product interior tissue performance requirement, its isothermal normalizing technology is: be heated to 980 ° of C with stove, be incubated 3 hours, be chilled to 650 ° of C soon, be incubated the air cooling of coming out of the stove after 3 hours.

3, conventional ball blast operation.

4, conventional phospholeum chemical industry preface.

5, occlusion regular squeeze, adopt the method for occlusion regular squeeze, that once finishes the maximum deformation quantity step just is extruded into shape, by 37.9 millimeters occlusion regular squeezes of blank diameter φ to 38.3 millimeters of axle outside diameter φ, 205 millimeters of length, 22 millimeters of axle end diameter φ, 84 millimeters of length, 40 ° of step chamferings, deflection are 67%.The recipient of 250 millimeters of length is divided into recipient 2 and following recipient 3, an elevated pressure nitrogen cylinder 1 is arranged on last recipient 2, when press ram 7 comes downwards to recipient 2 and contacts with following recipient 3, provide inaccessible power by elevated pressure nitrogen cylinder 1, make recipient 2 and following recipient 3 closures, slide block 7 continues descending, cylinder is compressed, upper punch 6 promotes workpiece and carries out just crowded, moving to bottom dead centre until slide block 7 finishes just crowded, last recipient 2 with slide block 7 backhauls to top dead-centre, the push rod 5 up workpiece 4 that eject.The Hardmetal materials that the just crowded die day core rod employing trade mark is YG20 is made.

6, conventional ball blast operation.

7, conventional phospholeum chemical industry preface.

8, preform operation mainly is that two steps that carry out the other end are shaped, because the deflection of these two steps is all very little, therefore once finishes the shaping of two steps.The first step diameter reduces to φ 34.5 by φ 38.5, and deflection is 19.7%, and the second step diameter reduces to φ 33.5 by φ 34.5, and deflection is 5.7%, and total deformation is 24.2%.

9, forming process mainly is the boss of rammer mid portion, finishes the diameter-reducing formation of a step simultaneously, and the projection section diameter becomes φ 53.5 by φ 38.5, and deflection is about 54.7%, and to φ 27.9, deflection is 30.6% to another stepped diameters by φ 33.5 tube reducings.

Claims (3)

1. occlusion regular squeeze mold method for prolate axis, its technological process comprises the saw material successively, with the major axis blank anneal, ball blast, phospholeum processing, then blank is carried out occlusion regular squeeze, a step finishing maximum deformation quantity is shaped, ball blast, phospholeum processing again, continuous and cold-finish by some roads make many steps be shaped; Described saw material refers to that cutting stock weight is controlled at 1.01~1.02 times of finished weight, and the blanking diameter can not be greater than the finished product maximum gauge; Described annealing is finished when work piece and also will be carried out slotted hole after the major axis occlusion regular squeeze is shaped and add man-hour, is meant that isothermal normalizing handles, and when work piece is finished the major axis occlusion regular squeeze and is shaped the no slotted hole processing request in back, is meant common spheroidizing; Described ball blast, phospholeum turn to conventional ball blast and conventional phospholeumization; Described occlusion regular squeeze operation is meant the method that adopts occlusion regular squeeze, and that once finishes the maximum deformation quantity step just is extruded into shape; Described many step shapings are meant the shape according to the major axis part, and except that completed maximum variable step was shaped, whenever one to two step was finished the shaping of many steps axle by a cold-finish; It is characterized in that: the method for described occlusion regular squeeze is meant, a long recipient is divided into recipient and following recipient, an inaccessible cylinder is arranged on last recipient, when press ram comes downwards to recipient and contacts with following recipient, provide inaccessible power by inaccessible cylinder, make upper and lower recipient closure, slide block continues descending, cylinder is compressed, slide block promotes upper punch, and upper punch promotion workpiece carries out just crowded, moves to bottom dead centre until slide block and finishes just crowded, last recipient with the slide block backhaul to top dead-centre, the up workpiece that ejects of push rod.
2. according to the described occlusion regular squeeze mold method for prolate axis of claim 1, it is characterized in that: described inaccessible cylinder is the elevated pressure nitrogen cylinder.
3. according to the described occlusion regular squeeze mold method for prolate axis of claim 1, it is characterized in that: the mould that the Hardmetal materials that described occlusion regular squeeze operation employing is YG20 with the trade mark is made, described carbide alloy is meant that tungsten carbide is a matrix, and cobalt is the material that binding agent is made.
CN2008101961034A 2008-09-16 2008-09-16 Occlusion extruding molding method for long axis CN101352799B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2008101961034A CN101352799B (en) 2008-09-16 2008-09-16 Occlusion extruding molding method for long axis

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Application Number Priority Date Filing Date Title
CN2008101961034A CN101352799B (en) 2008-09-16 2008-09-16 Occlusion extruding molding method for long axis

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CN101352799A CN101352799A (en) 2009-01-28
CN101352799B true CN101352799B (en) 2010-07-07

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Families Citing this family (11)

* Cited by examiner, † Cited by third party
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CN101773973A (en) * 2010-03-15 2010-07-14 北京机电研究所 Forming method of straight toothed spur gear compound forge with weight of 1-3 kilos, large diameter and large modulus
CN102211273B (en) * 2010-04-07 2013-06-05 江苏威鹰机械有限公司 Method for machining input shaft blank of gear box
CN101920304B (en) * 2010-06-30 2012-05-23 华南理工大学 Method for forging large steel shaft forging
CN102335810B (en) * 2011-08-19 2013-11-06 江苏森威精锻有限公司 Method for forming precise slender internal spline tube
CN102728773B (en) * 2012-06-11 2015-05-20 江苏森威精锻有限公司 One-time cold-forging blocking forming method for inner star wheel
CN104028952B (en) * 2013-03-07 2017-02-08 江苏龙城精锻有限公司 High-pressure common rail system oil injecting nozzle block forming technology
CN103302459A (en) * 2013-06-23 2013-09-18 盐城工学院 Machining method of automobile clutch damping shaft sleeve
CN103447772A (en) * 2013-09-11 2013-12-18 宁波市奇精机械有限公司 Spline machining technology
CN103934638B (en) * 2014-04-22 2016-06-22 江苏森威精锻有限公司 A kind of accurate external splines pipe manufacturing process
CN104191187B (en) * 2014-09-24 2016-06-08 浙江佑安高科消防系统有限公司 A kind of door closer gear shaft processing method
CN104589006B (en) * 2014-11-20 2016-09-21 江苏威鹰机械有限公司 The inaccessible moulding process of adjuster for train brake plate

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