CN106862879A - A kind of cold-forging forming technique of the hollow output shaft with flange - Google Patents

A kind of cold-forging forming technique of the hollow output shaft with flange Download PDF

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Publication number
CN106862879A
CN106862879A CN201710049101.1A CN201710049101A CN106862879A CN 106862879 A CN106862879 A CN 106862879A CN 201710049101 A CN201710049101 A CN 201710049101A CN 106862879 A CN106862879 A CN 106862879A
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China
Prior art keywords
flange
product
column blank
blank
cold
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CN201710049101.1A
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Chinese (zh)
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CN106862879B (en
Inventor
张花根
陈雪锋
季微微
王成勇
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Jiangsu Chuangyi Precision Forging Co., Ltd.
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Jiangsu Chuangyi Automotive Parts Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/14Making specific metal objects by operations not covered by a single other subclass or a group in this subclass gear parts, e.g. gear wheels

Abstract

The invention discloses a kind of cold-forging forming technique of the hollow output shaft with flange, it comprises the following steps:Blanking>Blank softens>Base>First time ball blast>First subsurface phospholeum>First time extrusion molding>Stress relief annealing>Second ball blast>Second subsurface phospholeum>Second extrusion molding>Removal gross weight.Compared with prior art, the technical effects of the invention are that:1st, when extruding prepares hollow hole and shaped flange side, each section of product is all subject to deformable squeeze and obtains intensity higher, so as to improve the service life of product;2nd, hollow hole is flowed by the material in extrusion process and is formed, and has saved blank, reduces the production cost of product.

Description

A kind of cold-forging forming technique of the hollow output shaft with flange
Technical field
The present invention relates to metal stamping field, and in particular to a kind of cold-forging forming of the hollow tube output shaft with flange Technique.
Background technology
Hollow tube output shaft with flange, is also called pipe axle, is the key components and parts in automobile, simultaneously because it makes Consumption is big, and the economy of manufacturing process is also important Consideration.
Referring to Fig. 1, it is existing in the hollow tube output shaft with flange it is general it is forged after machining shaping, its is brief Technological process is:Blanking:To obtain column blank 100a;Base:Oxide skin, the fine fisssure on blank 100a surfaces are removed using lathe The defects such as line, obtain qualified column blank 100b;Extrusion forming:Column blank 100b is put into the extruding with predetermined shape In mould, extrude the upper and lower side of column blank 100b to obtain the primary formed product 100c with flange:Machine drilling:Make Get out axial hollow hole to obtain finished product 100d on the primary formed product 100c with drilling machine.
There is following defect in existing forging technology:(1), in forging process, only the middle-end to output shaft is squeezed excessively Pressure, causes not deformed section of output shaft of low strength, reduces the service life of product;(2), hollow hole is by machine drilling shape Into causing the serious waste of blank.
The content of the invention
The present invention is regarding to the issue above, there is provided a kind of cold-forging forming technique of hollow tube output shaft, its particular technique side Case is as follows:
A kind of cold-forging forming technique of the hollow output shaft with flange, it comprises the following steps:
Blanking:Round steel bar stock saw cutting is taken to obtain column blank;
Blank softens:Column blank is annealed using shaft furnace, is subsequent technique to reduce the hardness of column blank It is ready;
Base:The oxide skin and micro-crack of the column blank surface after softening are removed using lathe, obtaining has high-quality The column blank on surface;
First time ball blast:Ball blast cleaning is carried out to the column blank after base using Shotblast cleaning machine, to increase its surface Product;
First subsurface phospholeum:To carrying out surface phosphorus saponification process by the column blank after ball blast, to cause its table Face forms layer protective layer;
First time extrusion molding:The die cavity with the first predetermined shape will be put into by the column blank after phosphorus saponification process Extrusion die in, and column blank is extruded to be formed on the hollow hole of gross weight, obtain the first just shaping and produce Product;
Stress relief annealing:Stress relief annealing is carried out to the first first formed product using annealing furnace, to remove its internal stress;
Second ball blast:Ball blast cleaning is carried out to the first first formed product using Shotblast cleaning machine, to increase its surface area;
Second subsurface phospholeum:To by first after ball blast, just formed product carries out surface phosphorus saponification process, so that Obtain its surface and form layer protective layer;
Second extrusion molding:First first formed product is put into the extrusion die of the die cavity with the second predetermined shape In, to being extruded to prepare flange in the middle part of first just formed product, obtain the second first formed product;
Removal gross weight:The hollow hole of the second first formed product is finished to preliminary dimension using lathe, while removal is hollow Hole gross weight, obtains finished product.
Further, the temperature control of the stress relief annealing step is:Three heating zones are set gradually in annealing furnace, The column blank 200b passes sequentially through the first heating zone, the second heating zone and the 3rd heating zone, the heating temperature of the first heating zone It is 600 DEG C -660 DEG C to spend, and the second heating zone heating-up temperature is 600-640 DEG C, and the 3rd heating zone heating-up temperature is 580-620 DEG C, Total heat time is controlled to 2.5 hours, furnace cooling afterwards to natural cooling of coming out of the stove after 500 DEG C.
Further, each groove in the first time phosphorus saponification treatment step and the second phosphorus saponification treatment step is molten The proportioning of liquid is identical, specific as follows:Concentration of caustic soda in degreasing bath is 50-60 g/l;Sulfuric acid concentration in descaling bath is 13%-17%;Total acidity is 48%-52% in Phosphating Slot;Saponification liquor concentration is 1.8%-2.2% in soap tank.
Further, in the first time extrusion molding step, when controlling the position of punching recess to avoid shaping flange Deformed area.
Compared with prior art, the technical effects of the invention are that:(1) hollow hole and shaping flange, are prepared in extruding When, make each section of product to be all subject to deformable squeeze and obtain intensity higher, so as to improve the service life of product;(2) in, Emptying aperture is flowed by the material in extrusion process and is formed, and has saved blank, reduces the production cost of product.
Brief description of the drawings
Fig. 1 is the metamorphosis figure of the product in forging technology of the prior art;
The flow chart of the cold-forging forming technique that Fig. 2 is provided for the present invention;
Product form variation diagram in the cold-forging forming technique that Fig. 3 is provided for the present invention.
Specific embodiment
For make the above objects, features and advantages of the present invention, can be more obvious understandable, it is below in conjunction with the accompanying drawings and specific real The present invention is further detailed explanation to apply mode.
Referring to Fig. 2 and Fig. 3, in a specific embodiment, the hollow tube output shaft with flange that the present invention is provided Cold-forging forming technique comprise the following steps:
1st, blanking:20CrMnTi round steel bar stock saw cutting is taken to obtain column blank 200a, the weight of control column blank 200a Measure the weight weight 5-8% than finished product.
2nd, blank softens:Column blank 200a is heated to 700 DEG C using shaft furnace, 4.5 hours are incubated, is heated to , after being incubated 4.5 hours, 1 hour is incubated after cooling to 700 DEG C with the furnace, furnace cooling is cold to nature of coming out of the stove is less than after 350 ° by 750 DEG C But, it is ready subsequent technique to reduce the hardness of column blank 200a.
3rd, base:The defects such as oxide skin, the micro-crack on column blank 200a surfaces after softening are removed using lathe, is obtained Column blank 200b with high-quality surface.
4th, first time ball blast:Ball blast cleaning is carried out to the column blank 200b after base using Shotblast cleaning machine, to increase Its surface area.
5th, the first subsurface phospholeum:To carrying out surface phosphorus saponification process by ball blast column blank 200b, to cause it Surface forms layer protective layer.
In the present embodiment, the proportioning of each groove solution in the treatment of the first subsurface phospholeumization is as follows:Caustic soda in degreasing bath Concentration is 50-60 g/l;Sulfuric acid concentration in descaling bath is 13%-17%;Total acidity is 48%-52% in Phosphating Slot;Saponification Saponification liquor concentration is 1.8%-2.2% in groove.
6th, first time extrusion molding:It is pre- with corresponding first by being put into by the column blank 200b after phosphorus saponification process In determining the extrusion die of shaped die cavity, and column blank 200b is extruded to be formed on remaining with the hollow of gross weight Hole, obtains the first first formed product 200c.
In the present embodiment, in first time extrusion process, by adjusting the upper punch of extrusion die and the position of lower envelope material Put, control gross weight position avoid shape flange when deformed area.On the one hand it can carry for subsequent extrusion shaping flange For sufficient material, the middle shaft part of product is on the other hand enabled to also sufficiently to be extruded and obtain intensity higher.
7th, stress relief annealing:The first first formed product 200c is heated into certain temperature using annealing furnace carries out destressing Annealing, removes the internal stress of blank.
In the present embodiment, the temperature control of stress relief annealing is:Three heating zones, the post are set gradually in annealing furnace Shape blank 200c passes sequentially through the first heating zone, the second heating zone and the 3rd heating zone, and the heating-up temperature of the first heating zone is 600 DEG C -660 DEG C, the second heating zone heating-up temperature is 600-640 DEG C, and the 3rd heating zone heating-up temperature is 580-620 DEG C, when always heating Between be controlled to 2.5 hours, furnace cooling afterwards to natural cooling of coming out of the stove after 500 DEG C.
8th, second ball blast:Ball blast cleaning is carried out using Shotblast cleaning machine formed product 200c first to first, to increase it Surface area.
9th, the second subsurface phospholeum:To being carried out at the phospholeum of surface by the column blank 200c after stress relief annealing Reason, to cause that its surface forms layer protective layer.
In the present embodiment, the proportioning of each groove solution in the treatment of the second subsurface phospholeumization is as follows:Caustic soda in degreasing bath Concentration is 50-60 g/l;Sulfuric acid concentration in descaling bath is 13%-17%;Total acidity is 48%-52% in Phosphating Slot;Saponification Saponification liquor concentration is 1.8%-2.2% in groove.
10th, second extrusion molding:First first formed product 200c is put into corresponding second predetermined shape die cavity Extrusion die in, the top to the first first formed product 200c is extruded to prepare flange, obtains the second just shaping Product 200d.
11st, punching recess is removed:Lathe is used to finish the hollow hole of the second first formed product 200d to preliminary dimension, together When remove gross weight, obtain finished product 200e.
Compared with prior art, the technical effects of the invention are that:(1), when extruding prepares hollow hole, the centre of product Shaft part is also sufficiently extruded and is obtained intensity higher, so as to improve the service life of product;(2), hollow hole is by squeezing Material in pressure technique flows to be formed, so as to save blank, reduces the production cost of product.
The description with certain particularity detailed enough has been carried out to the present invention above.Ordinary skill in art Personnel should be appreciated that what the description in embodiment was merely exemplary, on the premise of without departing from true spirit of the present invention and scope Making all changes should all belong to protection scope of the present invention.Scope of the present invention is by the claim What book was defined, rather than what is limited by the description in embodiment.

Claims (4)

1. a kind of cold-forging forming technique of the hollow output shaft with flange, it comprises the following steps:
Blanking:Round steel bar stock saw cutting is taken to obtain column blank;
Blank softens:Column blank is annealed using shaft furnace, is that subsequent technique is carried out to reduce the hardness of column blank Prepare;
Base:The oxide skin and micro-crack of the column blank surface after softening are removed using lathe, obtaining has high-quality surface Column blank;
First time ball blast:Ball blast cleaning is carried out to the column blank after base using Shotblast cleaning machine, to increase its surface area;
First subsurface phospholeum:To carrying out surface phosphorus saponification process by the column blank after ball blast, to cause its surface shape Into layer protective layer;
First time extrusion molding:Squeezing for the die cavity with the first predetermined shape will be put into by the column blank after phosphorus saponification process In compression mould, and column blank is extruded to be formed on remaining with the hollow hole of gross weight, obtain the first just shaping and produce Product;
Stress relief annealing:Using annealing furnace to obtain first just formed product carry out stress relief annealing, with remove first just into The internal stress of shape product;
Second ball blast:Ball blast cleaning is carried out to the first first formed product using Shotblast cleaning machine, to increase its surface area;
Second subsurface phospholeum:To by first after stress relief annealing, just formed product carries out surface phosphorus saponification process, with So that its surface forms layer protective layer;
Second extrusion molding:First first formed product is put into the extrusion die of the die cavity with the second predetermined shape, it is right First first formed product is extruded to prepare flange, obtains the second first formed product;
Removal gross weight:The hollow hole of the second first formed product is finished to preliminary dimension using lathe, while removing gross weight, is obtained Finished product.
2., such as the cold-forging forming technique of the hollow output shaft with flange in claim 1, its feature is being:
The temperature control of the stress relief annealing step is:Three heating zones, the column blank are set gradually in annealing furnace 200c passes sequentially through the first heating zone, the second heating zone and the 3rd heating zone, and the heating-up temperature of the first heating zone is 600 DEG C -660 DEG C, the second heating zone heating-up temperature is 600-640 DEG C, and the 3rd heating zone heating-up temperature is 580-620 DEG C, total heat time control It is 2.5 hours, furnace cooling afterwards to natural cooling of coming out of the stove after 500 DEG C.
3., such as the cold-forging forming technique of the hollow output shaft with flange in claim 1, its feature is being:
The proportioning of each groove solution in the first time phosphorus saponification treatment step and the second phosphorus saponification treatment step is identical, It is specific as follows:Concentration of caustic soda in degreasing bath is 50-60 g/l;Sulfuric acid concentration in descaling bath is 13%-17%;Phosphating Slot Middle total acidity is 48%-52%;Saponification liquor concentration is 1.8%-2.2% in soap tank.
4., such as the cold-forging forming technique of the hollow output shaft with flange in claim 1, its feature is being:
In the first time extrusion molding step, control gross weight position avoid shape flange when deformed area.
CN201710049101.1A 2017-01-23 2017-01-23 A kind of cold-forging forming technique of the hollow output shaft with flange Active CN106862879B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112359180A (en) * 2020-11-09 2021-02-12 盐城市明佳机械有限公司 Precision forging forming process of torque elastomer for 330MPa motor torque sensor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040025688A1 (en) * 2002-08-12 2004-02-12 Koekenberg Leonardus Gerhardus P. Method and tools for manufacturing a master cylinder for a brake system, and cylinder manufactured therewith
CN101422861A (en) * 2008-11-27 2009-05-06 江苏森威精锻有限公司 Accurate forming method of special-shape deep-hole type parts
CN102397964A (en) * 2010-09-10 2012-04-04 江苏威鹰机械有限公司 Energy accumulator shell forging process
CN103624205A (en) * 2013-12-04 2014-03-12 江苏威鹰机械有限公司 Cold-forging plastic molding technology of precisely-forged brake threaded pipe component
CN105945519A (en) * 2016-05-24 2016-09-21 江苏创汽车零部件有限公司 Cold forging forming technology of hollow pipe output shaft

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040025688A1 (en) * 2002-08-12 2004-02-12 Koekenberg Leonardus Gerhardus P. Method and tools for manufacturing a master cylinder for a brake system, and cylinder manufactured therewith
CN101422861A (en) * 2008-11-27 2009-05-06 江苏森威精锻有限公司 Accurate forming method of special-shape deep-hole type parts
CN102397964A (en) * 2010-09-10 2012-04-04 江苏威鹰机械有限公司 Energy accumulator shell forging process
CN103624205A (en) * 2013-12-04 2014-03-12 江苏威鹰机械有限公司 Cold-forging plastic molding technology of precisely-forged brake threaded pipe component
CN105945519A (en) * 2016-05-24 2016-09-21 江苏创汽车零部件有限公司 Cold forging forming technology of hollow pipe output shaft

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112359180A (en) * 2020-11-09 2021-02-12 盐城市明佳机械有限公司 Precision forging forming process of torque elastomer for 330MPa motor torque sensor

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