CN106862879B - 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 PDFInfo
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- CN106862879B CN106862879B CN201710049101.1A CN201710049101A CN106862879B CN 106862879 B CN106862879 B CN 106862879B CN 201710049101 A CN201710049101 A CN 201710049101A CN 106862879 B CN106862879 B CN 106862879B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/14—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass gear parts, e.g. gear wheels
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Abstract
The invention discloses a kind of cold-forging forming techniques of hollow output shaft with flange comprising following steps: blanking -> blank softening -> base -> first time ball blast -> the first subsurface phospholeum -> first time extrusion molding -> stress relief annealing -> second of ball blast -> second subsurface phospholeum -> second of extrusion molding -> removal gross weight.Compared with prior art, the technical effects of the invention are that: 1, when extruding prepares hollow hole and shaped flange side, each section of product is all obtained higher intensity by deformable squeeze, to improve the service life of product；2, hollow hole is flowed by the material in extrusion process and is formed, and has saved blank, reduces the production cost of product.
Description
Technical field
The present invention relates to metal stamping fields, and in particular to a kind of cold-forging forming of the hollow tube output shaft with flange
Technique.
Background technique
Hollow tube output shaft with flange, also known as pipe axis, are the key components and parts in automobile, simultaneously because it makes
Dosage is big, and the economy of manufacturing process is also important consideration factor.
Referring to Fig. 1, it is existing in hollow tube output shaft with flange it is general it is forged after it is machined after forming, briefly
Process flow are as follows: blanking: to obtain column blank 100a；Base: oxide skin, the fine fisssure on the lathe removal surface blank 100a are used
The defects of line, obtains qualified column blank 100b；Extrusion forming: column blank 100b is put into the extruding with predetermined shape
In mold, the upper and lower side of column blank 100b is squeezed to obtain the primary formed product 100c with flange: machine drilling: being made
Axial hollow hole is drilled out to obtain finished product 100d on the primary formed product 100c with drilling machine.
Existing forging technology has following defects that (1), in forging process, is only squeezed excessively to the middle-end of output shaft
Pressure, causes undeformed section of low strength of output shaft, reduces the service life of product；(2), hollow hole is by machine drilling shape
At causing the serious waste of blank.
Summary of the invention
The present invention is in view of the above-mentioned problems, provide a kind of cold-forging forming technique of hollow tube output shaft, particular technique side
Case is as follows:
A kind of cold-forging forming technique of the hollow output shaft with flange comprising following steps:
Blanking: round steel bar stock saw cutting is taken to obtain column blank；
Blank softening: annealing to column blank using shaft furnace, is subsequent technique to reduce the hardness of column blank
It is ready；
Base: using the oxide skin and micro-crack of the column blank surface after lathe removal softening, 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: phosphorus saponification process in surface is carried out to the column blank after ball blast, so that its table
Face forms a protective layer；
First time extrusion molding: will treated that column blank is put into the die cavity with the first predetermined shape by phospholeumization
Extrusion die in, and column blank is squeezed to be formed on the hollow hole of gross weight, obtains the first just forming and produce
Product；
Stress relief annealing: using annealing furnace to the first just formed product progress stress relief annealing, to remove its internal stress；
Second of ball blast: using Shotblast cleaning machine to the first just formed product progress ball blast cleaning, to increase its surface area；
Second subsurface phospholeum: to first after ball blast, just formed product carries out surface phosphorus saponification process, so that
It obtains its surface and forms a protective layer；
Second of extrusion molding: the first first formed product is put into the extrusion die of the die cavity with the second predetermined shape
In, to being squeezed in the middle part of first just formed product to prepare flange, obtain the second first formed product；
Remove gross weight: the hollow hole of formed product at the beginning of using lathe finishing second to predetermined size, while removing hollow
Hole gross weight obtains finished product.
Further, the temperature control of the stress relief annealing step are as follows: 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 third heating zone, the heating temperature of the first heating zone
Degree is 600 DEG C -660 DEG C, and the second heating zone heating temperature is 600-640 DEG C, and third heating zone heating temperature is 580-620 DEG C,
Total heating time control is 2.5 hours, furnace cooling later to natural cooling of coming out of the stove after 500 DEG C.
Further, each slot in the first time phosphorus saponification treatment step and second of the phosphorus saponification treatment step is molten
The proportion of liquid is identical, specific as follows: the concentration of caustic soda in degreasing bath is 50-60 grams per liter；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, control punching recess position avoid forming flange when
Deformed area.
Compared with prior art, the technical effects of the invention are that: (1), extruding prepare hollow hole and forming flange
When, so that each section of product is all obtained higher intensity by deformable squeeze, to improve the service life of product；(2), in
Emptying aperture is flowed by the material in extrusion process to be formed, and has been saved blank, has been reduced the production cost of product.
Detailed description of the invention
Fig. 1 is the metamorphosis figure of the product in forging technology in the prior art；
Fig. 2 is the flow chart of cold-forging forming technique provided by the invention；
Fig. 3 is the product form variation diagram in cold-forging forming technique provided by the invention.
Specific embodiment
To make the above objects, features and advantages of the present invention, can be more obvious and easy to understand, it is with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
Referring to fig. 2 and Fig. 3, in a specific embodiment, the hollow tube output shaft provided by the invention with flange
Cold-forging forming technique include the following steps:
1, blanking: 20CrMnTi round steel bar stock saw cutting is taken to obtain column blank 200a, controls the weight of column blank 200a
Measure the weight weight 5-8% than finished product.
2, blank softens: column blank 200a being heated to 700 DEG C using shaft furnace, 4.5 hours is kept the temperature, is heated to
After 750 DEG C, heat preservation 4.5 hours, 1 hour is kept the temperature after cooling to 700 DEG C with the furnace, furnace cooling nature of coming out of the stove to after less than 350 ° is cold
But, it to reduce the hardness of column blank 200a, is ready for subsequent technique.
3, base: the defects of oxide skin, the micro-crack on the surface column blank 200a after softening are removed using lathe is obtained
Column blank 200b with high-quality surface.
4, 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.
5, the first subsurface phospholeum: carrying out surface phosphorus saponification process to by ball blast column blank 200b, so that its
Surface forms a protective layer.
In the present embodiment, the proportion of each slot solution in the processing of the first subsurface phospholeumization is as follows: the caustic soda in degreasing bath
Concentration is 50-60 grams per liter；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 slot.
6, first time extrusion molding: will treated that column blank 200b is put into is pre- with corresponding first by phospholeumization
Determine in the extrusion die of shaped die cavity, and column blank 200b is squeezed to be formed on and remain 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 low punch
Set, control gross weight position avoid forming flange when deformed area.Its one side can shape flange for subsequent extrusion and mention
For sufficient material, the intermediate shaft part of product is on the other hand enabled to also adequately to be squeezed and obtain higher intensity.
7, stress relief annealing: the first first formed product 200c is heated to certain temperature using annealing furnace and carries out destressing
Annealing, removes the internal stress of blank.
In the present embodiment, the temperature of stress relief annealing is controlled are as follows: three heating zones, the column are set gradually in annealing furnace
Shape blank 200c passes sequentially through the first heating zone, the second heating zone and third heating zone, and the heating temperature of the first heating zone is 600
DEG C -660 DEG C, the second heating zone heating temperature is 600-640 DEG C, and third heating zone heating temperature is 580-620 DEG C, when total heating
Between control be 2.5 hours, furnace cooling later to natural cooling of coming out of the stove after 500 DEG C.
8, second of ball blast: using Shotblast cleaning machine to the first just formed product 200c progress ball blast cleaning, to increase it
Surface area.
9, the second subsurface phospholeum: the column blank 200c after stress relief annealing is carried out at the phospholeum of surface
Reason, so that its surface forms a protective layer.
In the present embodiment, the proportion of each slot solution in the processing of the second subsurface phospholeumization is as follows: the caustic soda in degreasing bath
Concentration is 50-60 grams per liter；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 slot.
10, second of extrusion molding: the first first formed product 200c is put into corresponding second predetermined shape die cavity
Extrusion die in, the top of the first first formed product 200c is squeezed to prepare flange, second is obtained and just shapes
Product 200d.
11, punching recess is removed: the hollow hole of formed product 200d at the beginning of using lathe finishing second to predetermined size, 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 adequately squeezed and obtains higher intensity, to improve the service life of product；(2), hollow hole is by squeezing
Material in pressure technique flows to be formed, 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 fields
Personnel should be understood that the description in embodiment is only exemplary, under the premise of without departing from true spirit of the present invention and range
Making all changes all should belong to protection scope of the present invention.Scope of the present invention is by the claim
What book was defined, rather than limited by the description in embodiment.
Claims (3)
1. a kind of cold-forging forming technique of the hollow output shaft with flange comprising following steps:
Blanking: round steel bar stock saw cutting is taken to obtain column blank；
Blank softening: it is annealed using shaft furnace to column blank, to reduce the hardness of column blank, is carried out for subsequent technique
Prepare；
Base: using the oxide skin and micro-crack of the column blank surface after lathe removal softening, 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: phosphorus saponification process in surface is carried out to the column blank after ball blast, so that its surface shape
At a protective layer；
First time extrusion molding: will squeezing by phospholeumization treated column blank the is put into die cavity with the first predetermined shape
In compression mould, and controls the upper punch of extrusion die, low punch and the both ends of column blank are squeezed with shape on it respectively
The hollow hole of gross weight is remained at its middle part, obtains the first first formed product, in the first time extrusion molding step, control connects
Avoid deformed area when forming flange in the position of skin；
Stress relief annealing: using annealing furnace to the first of acquisition just formed product carry out stress relief annealing, with removal first just at
The internal stress of shape product；
Second of ball blast: using Shotblast cleaning machine to the first just formed product progress ball blast cleaning, to increase its surface area；
Second subsurface phospholeum: to first after stress relief annealing, just formed product carries out surface phosphorus saponification process, with
So that its surface forms a protective layer；
Second of extrusion molding: the first first formed product is put into the extrusion die of the die cavity with the second predetermined shape, right
First first formed product is squeezed to prepare flange, and the second first formed product is obtained；
Remove gross weight: the hollow hole of formed product at the beginning of using lathe finishing second to predetermined size, while gross weight is removed, it obtains
Finished product.
2. the cold-forging forming technique of the hollow output shaft as claimed in claim 1 with flange, feature are being:
The temperature of the stress relief annealing step controls are as follows: three heating zones, the column blank are set gradually in annealing furnace
The first heating zone, the second heating zone and third heating zone are passed sequentially through, the heating temperature of the first heating zone is 600 DEG C -660 DEG C,
Second heating zone heating temperature is 600-640 DEG C, and third heating zone heating temperature is 580-620 DEG C, and total heating time control is
2.5 hours, furnace cooling later to natural cooling of coming out of the stove after 500 DEG C.
3. the cold-forging forming technique of the hollow output shaft as claimed in claim 1 with flange, feature are being:
The first subsurface phospholeum processing step and each slot solution in the second subsurface phospholeum processing step
Match identical, specific as follows: concentration of caustic soda in degreasing bath is 50-60 grams per liter；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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710049101.1A CN106862879B (en) | 2017-01-23 | 2017-01-23 | A kind of cold-forging forming technique of the hollow output shaft with flange |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710049101.1A CN106862879B (en) | 2017-01-23 | 2017-01-23 | A kind of cold-forging forming technique of the hollow output shaft with flange |
Publications (2)
| Publication Number | Publication Date |
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| CN106862879A CN106862879A (en) | 2017-06-20 |
| CN106862879B true CN106862879B (en) | 2019-03-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN114055101A (en) * | 2021-12-23 | 2022-02-18 | 沧州中星石油器材有限公司 | Novel titanium alloy drill rod joint forging production process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101422861A (en) * | 2008-11-27 | 2009-05-06 | 江苏森威精锻有限公司 | Precision forming method for special-shaped deep hole 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 |
Family Cites Families (1)
| 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 |
-
2017
- 2017-01-23 CN CN201710049101.1A patent/CN106862879B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101422861A (en) * | 2008-11-27 | 2009-05-06 | 江苏森威精锻有限公司 | Precision forming method for special-shaped deep hole 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 |
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| CN106862879A (en) | 2017-06-20 |
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| CB02 | Change of applicant information |
Address after: 224100 No. 5 Xikang Road, Dafeng Development Zone, Yancheng City, Jiangsu Applicant after: Jiangsu Chuangyi Automotive Parts Co., Ltd. Address before: 224100 No. 79 Xikang South Road, Dafeng City, Yancheng City, Jiangsu Applicant before: Jiangsu Chuangyi Automotive Parts Co., Ltd. |
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| TR01 | Transfer of patent right |
Effective date of registration: 20190709 Address after: 224000 No. 79 Xikang Road, Dafeng Development Zone, Yancheng City, Jiangsu Patentee after: Jiangsu Chuangyi Precision Forging Co., Ltd. Address before: 224100 No. 5 Xikang Road, Dafeng Development Zone, Yancheng City, Jiangsu Patentee before: Jiangsu Chuangyi Automotive Parts Co., Ltd. |
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| TR01 | Transfer of patent right |