CN106862472A - Wear-resisting circular shaft cold extruding processing method and brake shoe roller axle processing method - Google Patents

Wear-resisting circular shaft cold extruding processing method and brake shoe roller axle processing method Download PDF

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Publication number
CN106862472A
CN106862472A CN201710145533.2A CN201710145533A CN106862472A CN 106862472 A CN106862472 A CN 106862472A CN 201710145533 A CN201710145533 A CN 201710145533A CN 106862472 A CN106862472 A CN 106862472A
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CN
China
Prior art keywords
axle
round steel
wear
processing
circular shaft
Prior art date
Application number
CN201710145533.2A
Other languages
Chinese (zh)
Inventor
谢生明
Original Assignee
谷城天兴机械有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 谷城天兴机械有限公司 filed Critical 谷城天兴机械有限公司
Priority to CN201710145533.2A priority Critical patent/CN106862472A/en
Publication of CN106862472A publication Critical patent/CN106862472A/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J3/00Lubricating during forging or pressing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/002Hybrid process, e.g. forging following casting
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21KMAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00Making machine elements
    • B21K1/06Making machine elements axles or shafts

Abstract

The present invention relates to machining technology field,More particularly to a kind of wear-resisting circular shaft cold extruding processing method,45# round steel is pressed into length blanking,Annealing,Shot-peening descale,Round steel is put into again after being soaked in 90 DEG C~110 DEG C of graphite milk solution and taken out,Place into cold extrusion die extruding,The die cavity of cold extrusion die is vertical cylinder,Punch-pin lower end is cylinder,Its diameter and round steel equal diameters,The diameter of die cavity 0.8mm~1mm bigger than the diameter of round steel,Outwards expansion forms the axle body of any surface finish in die cavity for the bottom of round steel,Gap of the unnecessary metal between punch-pin and cavity plate flows up to form flash,The height of control flash is between 6mm and 15mm,Workpiece is through removing Burr removal,Chamfering obtains wear-resisting circular shaft,For multi-diameter shaft,As brake shoe roller axle can also process axle body using the processing method,By this method,The bar portion of product(Axle body)Direct forming after the extruding of surface, therefore the processing capacity on surface is few, reduces processing cost, improves production efficiency.

Description

Wear-resisting circular shaft cold extruding processing method and brake shoe roller axle processing method
Technical field
The present invention relates to machining technology field, more particularly to a kind of wear-resisting circular shaft cold extruding processing method and braking Hoof roller shaft processing method.
Background technology
In field of machining, for the circular shaft of non-GB, generally require and be processed by lathe or other techniques, Processing cost is higher, and surface abrasion resistance is poor, and the circular shaft higher for wearability requirement needs to carry out Wear-resistant Treatment.
Vehicle brake is the important component of vehicle, is the key for ensureing traffic safety.The vehicle brake commonly used at present Including drum brake and disk brake.Current country's trailer, semitrailer, the widely used drum brake of lorry are by making Dynamic base plate, brake-shoe, friction facing, brake-shoe fulcrum post, camshaft, return spring, adjustment arm, extension spring, roller shaft, roller etc. Parts are constituted.Wherein roller shaft is also referred to as brake shoe roller pin, and roller is used together, and roller is socketed on roller shaft, when When stepping on brake, the cam curved surface pushing rolling wheels of camshaft open brake-shoe, the friction facing on brake-shoe be rotating Brake drum inner cylinder face contact, produce frictional resistance away from, implement braking, therefore, the mechanical property requirements of pair roller axle are very high, such as Fruit roller shaft breaks down and will result directly in brake fade.
In the prior art, the structure of roller shaft is as shown in figure 1, generally use 45# round steel through warm and hot forging, machining Into, forging technology is complicated, production efficiency is relatively low, needs to be processed each face of part after especially forging, and processing capacity is big, Cause the production cost of the product very high.The experiment of part producer is processed using extrusion process, but because technological design does not conform to Reason, the factor such as deflection is excessive, product surface have a large amount of crackles, it is impossible to obtain qualified products.
The content of the invention
The purpose of the present invention is to solve the shortcomings of the prior art, and provide a kind of wear-resisting circular shaft cold extruding processing method and Direct forming after the bar portion extruding of brake shoe roller axle processing method, circular shaft and brake shoe roller axle, processing capacity is few, reduces and adds Work cost, improves production efficiency.
The technical solution adopted for the present invention to solve the technical problems is:Wear-resisting circular shaft cold extruding processing method, 45# is justified Steel presses length blanking, first annealing, shot-peening descale, then after round steel is put into soaks in 90 DEG C~110 DEG C of graphite milk solution Take out, place into cold extrusion die extruding, the die cavity of cold extrusion die is vertical cylinder, and punch-pin lower end is cylinder, its Diameter and round steel equal diameters, the diameter 0.8mm~1mm bigger than the diameter of round steel of die cavity, the bottom of round steel are outside in die cavity Expansion forms the axle body of any surface finish, and the gap of unnecessary metal between punch-pin and cavity plate flows up to form flash, controls Between 6mm and 15mm, workpiece obtains wear-resisting circular shaft to the height of flash through removing Burr removal, chamfering.
Preferably, graphite milk solution is diluted with water the solution after 1 times for aquadag.
Preferably, the detailed process of annealing is:720 DEG C are heated slowly to, 2 hours are incubated, 500 DEG C are as cold as with stove and are come out of the stove, Naturally cool to normal temperature.
Preferably, round steel soaks 50 seconds~60 seconds in graphite milk solution.
Preferably, during cold extrusion, punch-pin downstream rate is 20~30mm/s.
A kind of brake shoe roller axle processing method, adds according to the wear-resisting circular shaft cold extruding processing method described in claim 1 The axle body of work brake shoe roller axle, then to axle body chamfering, car escape, car draw-in groove, kidney ellipsoid is processed by cold punching technology The shaft shoulder, is provided with the through hole with axle body interference fit in the middle part of the shaft shoulder, axle body then is carried into escape by friction welding technological One end and the shaft shoulder weld.
The beneficial effects of the invention are as follows:A kind of wear-resisting circular shaft cold extruding processing method, presses length blanking, first by 45# round steel Annealing, shot-peening descale, then round steel is put into soak in 90 DEG C~110 DEG C of graphite milk solution after take out, place into cold-extruded Compression mould is extruded, and the die cavity of cold extrusion die is vertical cylinder, and punch-pin lower end is cylinder, its diameter and round steel diameter phase Deng, the diameter 0.8mm~1mm bigger than the diameter of round steel of die cavity, outwards expansion forms any surface finish in die cavity for the bottom of round steel Axle body, the gap of unnecessary metal between punch-pin and cavity plate flows up to form flash, control the height of flash 6mm with Between 15mm, through going Burr removal, chamfering to obtain wear-resisting circular shaft, for multi-diameter shaft, such as brake shoe roller axle can also be used workpiece The processing method processes axle body, by this method, the bar portion of product(Axle body)Surface extruding after direct forming, therefore surface plus Work amount is few, reduces processing cost, improves production efficiency.
Brief description of the drawings
Fig. 1 is the structural representation of the brake shoe roller axle of present invention processing.
Fig. 2 is the explosive view of the brake shoe roller axle of present invention processing.
Description of reference numerals:
1 --- axle body 2 --- shaft shoulder.
Specific embodiment
The present invention is further detailed explanation with specific embodiment below in conjunction with the accompanying drawings, is not reality of the invention Apply scope limited to this.
Embodiment one.
Wear-resisting circular shaft cold extruding processing method, length blanking, height of the length according to flash after processing are pressed by 45# round steel Extrapolation, should ensure that the height of flash between 6mm and 15mm, both ensure that metal is completely filled with die cavity, also controlled waste material Ratio, so as to improve stock utilization, stock utilization of the invention can reach more than 98%.
Round steel is annealed, shot-peening descale, the detailed process of annealing is:720 DEG C are heated slowly to, insulation 2 is small When, it is as cold as 500 DEG C with stove and comes out of the stove, normal temperature is naturally cooled to, so that hardness is reduced, crystal grain thinning, material flowing during beneficial to cold forging.
Next round steel is put into after being soaked in 90 DEG C~110 DEG C of graphite milk solution and is taken out so that graphite milk solution is attached On the surface of round steel, 90 DEG C~110 DEG C of temperature causes that aquadag solution film forming is uniform.In the prior art, usually use , in the mold cavity surface of mould, consequently facilitating the demoulding and protection mould, and this programme is by concentration stone higher for aquadag solution spraying Black breast film forming and workpiece surface, so that the surface smoothness after workpiece deformation is very high, it is not necessary to process again.
Cold extrusion die extruding is put the workpiece in, the die cavity of cold extrusion die is vertical cylinder, and punch-pin lower end is circle Cylindricality, its diameter and round steel equal diameters, the diameter 0.8mm~1mm bigger than the diameter of round steel of die cavity, the bottom of round steel is in die cavity In outwards expansion form the axle body of any surface finish, the gap of unnecessary metal between punch-pin and cavity plate flows up to form hair Side, controls the height of flash between 6mm and 15mm, and workpiece obtains wear-resisting circular shaft, the length of wear-resisting circular shaft through removing Burr removal, chamfering Degree is by punch-pin when coming downwards to minimum point, and the distance between punch-pin lower end and axle body mold cavity bottoms are ensured.By this technology Scheme, workpiece is little by the procedure of processing needed after cold extrusion, and surface smoothness is high, hardness is high, and wearability is good, reduces and adds Work cost, improves production efficiency.
Further, graphite milk solution is diluted with water the solution after 1 times for aquadag, and the aquadag for using is forging graphite Breast.
The diameter of die cavity 0.8mm~1mm bigger than the diameter of round steel, unsuitable excessive or too small, axle body table when excessive of the numerical value The finish in face is poor, and axle body is easily cracked, thereby increases and it is possible to so that the kidney ellipsoid shaft shoulder shifts with respect to axle body, and when smaller Crush resistance is larger to cause mould to be easily damaged, and surface occurs flow harden after round steel crimp, and case hardness increases, has Good mechanical performance.
Further, round steel soaks 1 minute or so in graphite milk solution.
During cold extrusion, punch-pin downstream rate is 20~30mm/s, and workpiece deformation is uniform, the punch-pin downstream rate also for Make surface that flow harden to occur.
Embodiment two.
As shown in Figure 1 and Figure 2, the present embodiment is a kind of brake shoe roller axle processing method, and brake shoe roller axle includes the shaft shoulder 2nd, axle body 1, axle body 1 is more long, it is desirable to have preferable wearability, axle body 1 is processed using the method for embodiment one, then to axle body 1 Chamfering, car escape, car draw-in groove, the kidney ellipsoid shaft shoulder 2 is processed by cold punching technology, and the middle part of the shaft shoulder 2 is provided with and the mistake of axle body 1 It is full of the through hole of cooperation, the one end of axle body 1 with escape is welded with the shaft shoulder 2 by friction welding technological then.
Finally it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than the present invention is protected The limitation of scope is protected, although being explained to the present invention with reference to preferred embodiment, one of ordinary skill in the art should Work as understanding, technical scheme can be modified or equivalent, without deviating from the reality of technical solution of the present invention Matter and scope.

Claims (6)

1. wear-resisting circular shaft cold extruding processing method, it is characterised in that:45# round steel is pressed into length blanking, first annealing, shot-peening deoxidation Skin, then round steel is put into soak in 90 DEG C~110 DEG C of graphite milk solution after take out, place into cold extrusion die extruding, cold-extruded The die cavity of compression mould is vertical cylinder, and punch-pin lower end is cylinder, its diameter and round steel equal diameters, the diameter ratio of die cavity Big 0.8mm~the 1mm of diameter of round steel, outwards expansion forms the axle body of any surface finish, unnecessary gold in die cavity for the bottom of round steel The gap belonged between punch-pin and cavity plate is flowed up to form flash, controls the height of flash between 6mm and 15mm, and workpiece is passed through Burr removal, chamfering is gone to obtain wear-resisting circular shaft.
2. wear-resisting circular shaft cold extruding processing method according to claim 1, it is characterised in that:Graphite milk solution is aquadag It is diluted with water the solution after 1 times.
3. wear-resisting circular shaft cold extruding processing method according to claim 1, it is characterised in that:The detailed process of annealing is: 720 DEG C are heated slowly to, 2 hours are incubated, 500 DEG C are as cold as with stove and are come out of the stove, naturally cool to normal temperature.
4. wear-resisting circular shaft cold extruding processing method according to claim 1, it is characterised in that:Round steel is in graphite milk solution Immersion 50 seconds~60 seconds.
5. wear-resisting circular shaft cold extruding processing method according to claim 1, it is characterised in that:During cold extrusion, punch-pin is descending Speed is 20~30mm/s.
6. a kind of brake shoe roller axle processing method, it is characterised in that:Add according to the wear-resisting circular shaft cold extrusion described in claim 1 Work method processes the axle body of brake shoe roller axle, then to axle body chamfering, car escape, car draw-in groove, by cold punching technology plus The work kidney ellipsoid shaft shoulder, is provided with the through hole with axle body interference fit in the middle part of the shaft shoulder, then by friction welding technological by axle body band The one end and the shaft shoulder for having escape are welded.
CN201710145533.2A 2017-03-13 2017-03-13 Wear-resisting circular shaft cold extruding processing method and brake shoe roller axle processing method CN106862472A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710145533.2A CN106862472A (en) 2017-03-13 2017-03-13 Wear-resisting circular shaft cold extruding processing method and brake shoe roller axle processing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710145533.2A CN106862472A (en) 2017-03-13 2017-03-13 Wear-resisting circular shaft cold extruding processing method and brake shoe roller axle processing method

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CN106862472A true CN106862472A (en) 2017-06-20

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101328930A (en) * 2008-07-29 2008-12-24 沈国元 Cold-extruded machining process of diesel starting shaft
CN101342566A (en) * 2008-08-25 2009-01-14 江苏创一精锻有限公司 Integral cold forging technique for angular wheel shaft
CN101579800A (en) * 2009-06-12 2009-11-18 大丰市中德精锻件有限公司 Warm/cold forging process for precision forgings with integrated long shafts and inner ball cages
CN102463320A (en) * 2010-11-11 2012-05-23 江苏威鹰机械有限公司 Cold forging precise forming process for mechanical transmission gear shaft
JP2012183563A (en) * 2011-03-07 2012-09-27 Jtekt Corp Method of manufacturing shaft member for wheel rolling bearing device
CN103350122A (en) * 2013-06-28 2013-10-16 洛阳北川重工机械有限公司 Gear shaft cold extruding process and mould
CN103909190A (en) * 2014-03-24 2014-07-09 大丰市中德精锻件有限公司 Cold extrusion forming process of ribbed pick forgings
CN105880304A (en) * 2016-05-27 2016-08-24 上海工程技术大学 Cold extruding forming method used for automotive spline sleeve part

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101328930A (en) * 2008-07-29 2008-12-24 沈国元 Cold-extruded machining process of diesel starting shaft
CN101342566A (en) * 2008-08-25 2009-01-14 江苏创一精锻有限公司 Integral cold forging technique for angular wheel shaft
CN101579800A (en) * 2009-06-12 2009-11-18 大丰市中德精锻件有限公司 Warm/cold forging process for precision forgings with integrated long shafts and inner ball cages
CN102463320A (en) * 2010-11-11 2012-05-23 江苏威鹰机械有限公司 Cold forging precise forming process for mechanical transmission gear shaft
JP2012183563A (en) * 2011-03-07 2012-09-27 Jtekt Corp Method of manufacturing shaft member for wheel rolling bearing device
CN103350122A (en) * 2013-06-28 2013-10-16 洛阳北川重工机械有限公司 Gear shaft cold extruding process and mould
CN103909190A (en) * 2014-03-24 2014-07-09 大丰市中德精锻件有限公司 Cold extrusion forming process of ribbed pick forgings
CN105880304A (en) * 2016-05-27 2016-08-24 上海工程技术大学 Cold extruding forming method used for automotive spline sleeve part

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
李娟: "CAPP中轴类零件工序图自动生成技术研究", 《机电工程》 *

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Application publication date: 20170620