CN106216957B - The manufacture method of torsion beam of automobile welded still pipe - Google Patents
The manufacture method of torsion beam of automobile welded still pipe Download PDFInfo
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- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
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Abstract
The present invention relates to a kind of manufacture method of torsion beam of automobile welded still pipe, belong to metal material processing technical field.The manufacture method of torsion beam of automobile welded still pipe, it includes the steps such as strip cutting, pickling processes, cold rolling, roll bending formation and welding, the processing of weld seam sublimate, phosphatization, saponification process, cold drawing treatment and Quenching Treatment.Torsion beam welded still pipe intensity height, the good toughness of manufacture method processing of the present invention, weld strength is high, higher obdurability can be still kept after larger plastic deformation is born, postwelding flattening test reaches 90 degree and the flat fusion line flawless of 0 degree of total head；Flaring test, enlarging rate >=17%, body（Including weld seam）Do not ftracture；Uniform wall thickness after the follow-up thermoforming of product, punching press, stable mechanical property, intensity reach 1500Mpa.
Description
Technical field
The present invention relates to a kind of manufacture method of torsion beam of automobile welded still pipe, belongs to metal material processing technology neck
Domain.
Background technology
Since reform and opening-up, Chinese Auto Industry development is swift and violent, into after the new century, either yield and sales volume, more
It is that explosive growth is presented, after particularly breaking through 18,000,000 to production and marketing in 2010, China has become the vapour of global maximum
Car production and consumption state, the automobile market in China is considered as future development market with the largest potentiality.Automobile industry turns into its people
Economic important pillar industry, form than more complete industrial system, also turned into and embody the significant of national competitiveness
Industry.
But with developing rapidly for automobile industry, a series of problem brought also progressively shows, global warming day
Increasingly acute, haze weather is more aobvious serious, and international crude petroleum disparities between supply and demand are progressively deepened, so development of the countries in the world in auto industry
On also from the development of simple amount then more focus on the lifting of matter, country participates in signing more than 140《Capital of a country memorandum of agreement》.And I
State will keep growth in longer one section of period automobile demand amount from now on, and the energy shortage and environmental pollution thus brought is asked
Topic will be protruded more.
In this context, accelerate to cultivate and development saves（Lightweight）Automobile and new-energy automobile, it is both effective alleviation energy
Source and environmental pressure, the urgent task of automobile industry sustainable development is promoted, be also to speed up automobile industry transition and upgrade, cultivate newly
Point of economic increase and international competitive advantage strategic measure.Therefore, lightweight turns into scheme of greatest concern at present, and automobile is light
Quantify to have become the trend that world car develops.Automotive light weight technology produces to automobile fuel saving, reduction discharge, improvement performance, automobile
Industry sound development is all significant, is the direction of modern automobile industry technology development.If authoritative studies have shown that vehicle complete vehicle
Weight reduction 10%, fuel efficiency can improve 6% ~ 8%, discharge drop 4%；Automobile kerb weight often reduces 100 kilograms, fuel consumption per hundred kilometers
0.3 ~ 0.6 liter can be reduced, CO2 emission can reduce by about 5 grams/kilometer；Vehicle weight reduces by 1%, and oil consumption can reduce by 0.7%.
And torsion beam of automobile suspension is as most widely used automobile suspension system, its technological improvement and lightweight process
Also strong influence the development of automobile industry.With the continuous progress of torsion beam of automobile moulding process, technology mode is from initial
Sheet material cold stamping, develop to tubing cold stamping, tubing drop stamping and Tube Hydroforming direction, new molding mode makes torsion
Product rigidity, flexibility are more preferable than ever for beam product, and dimensional accuracy is higher, and service life is longer, and weight is lighter.
And new moulding process depends on high-quality, high performance welded tube product.Because the technology of domestic automobile steel pipe is entered
Step is limited by the research and development of raw material, and entirely adopts longer for chain, it is impossible to directly facing vehicle manufacturer, so in whole automobile
Be always weak link in industry supply chain, thus so far the steel pipe of automobile using high quality high added value still rely on mostly into
Mouthful.
Therefore, our company combines research, experiment and the talent advantage, the industrialization advantage of Su Jia groups and upper Hypon of colleges and universities
The research and development strength of steel group, researches and develops the manufacture of torsion beam of automobile welded still pipe, and the research and development of the product will successfully promote automobile zero
The process of domestic part, fill up the domestic blank in the field.
The content of the invention
It is an object of the invention to overcome the deficiencies in the prior art, there is provided a kind of torsion beam of automobile welded still pipe
Manufacture method, using the torsion beam of this method processing with welded still pipe intensity is high, good toughness, weld strength is high, bear compared with
Higher obdurability can be still kept after big plastic deformation.
According to technical scheme provided by the invention：The manufacture method of torsion beam of automobile welded still pipe, it is characterised in that bag
Include following steps：
1）, strip cut：By the wide coil of strip of outsourcing, slitting into strip, is produced according to torsion beam with welded still pipe on slitter
Diameter needed for product determines the width of strip；
2）, pickling processes：By the good strip of slitting successively continually by descaling bath, cold rinse bank and hot water storgae, descaling bath
In pickle use hydrochloric acid, strip is first sent into cold rinse bank after overpickling and uses high pressure water washing, is then re-fed into hot water storgae
Scald, dried again after going out hot water storgae；
3）, cold rolling：Strip after pickling carries out cold rolling by milling train, and the thickness of strip welds equal to torsion beam after cold rolling
Thickness needed for tube product subtracts 0.05 ~ 0.15mm；
4）, roll bending formation and welding：Strip after cold rolling is sent into forming machine round add is made using W brake forming methods
Work, Cheng Yuanhou strip are welded into ERW on welding machine, and welding machine parameter setting is：Bonding power is 190 ~ 220KW, welding speed
It is 1.5 ~ 2mm to spend for 18 ~ 22m/min, amount of compression；
5）, weld seam sublimate processing：Welding region is rinsed using high pressure nitrogen in welding process is molded, specially existed
High pressure nitrogen fumarole is installed at welding region 50cm, high pressure nitrogen is full of whole welding region, so as to be to weld
Journey provides gas shield, reduces the generation of oxide inclusion in welding process, improves the exclusion efficiency of slag in weld；Meanwhile
When ERW not yet cools down, using the burr of burring knife milling downhand welding pipe commissure, including the outer hair of welded tube outer surface is removed
Burr inside thorn and welded tube；
6）, phosphatization, saponification process：ERW is immersed in phosphating pond and saponification pond successively, at progress phosphatization, saponification
Reason, the ERW after phosphatization, saponification, which is sent into head rolling machine, carries out dog, welded pipe end diameter is reached required size；
7）Cold drawing treatment：ERW is sent into drawbench and carries out cold-drawn, during cold-drawn, clamps the end after pinching processing
Head, while mandrel is inserted in welded tube, then welded tube is passed through the die hole for being less than welded tube external diameter with tapered minimum-value aperture, make
Caliber uniform shrinkage is deformed inside and outside welded tube, is extended on welded tube length direction, and cold-drawn 1 ~ 3 is carried out according to different technological requirements
It is secondary, to obtain required size；
8）, Quenching Treatment：ERW after cold drawing treatment is sent into glowing furnace, is heated to 820 ~ 840 DEG C, and insulation 30 ~
50min, then cooled down by way of oil cooling, then ERW is sent into tempering furnace, be heated to 480 ~ 500 DEG C, finally by
The mode of water cooling cools down welded tube.
As a further improvement on the present invention, the step 1）In coil of strip material be BR1500HS.
As a further improvement on the present invention, the step 2）In, the concentration of hydrochloric acid is 120 ~ 160g/L in descaling bath；It is cold
Flushing temperature in tank is 10 ~ 30 DEG C, and flushing pressure is 8 ~ 10kg/cm2；Temperature is scalded as 90 ~ 100 DEG C in hot water storgae；
Strip is 30 ~ 40m/ minutes by the speed of descaling bath, the speed of cold rinse bank and hot water storgae and drying, and drying temperature is 100 ~
120℃。
As a further improvement on the present invention, the step 6）In phosphating solution be volumetric concentration be 10 ~ 11% zinc calcium phosphorus
Change liquid, the temperature of phosphating solution is 65 ~ 75 DEG C, and dip time of the ERW in phosphating solution is 25 ~ 30 minutes.
As a further improvement on the present invention, the step 6）In saponification liquor composition include lubricant, water and soap powder, its
In, the mass ratio of lubricant and water is 1：（18~20）, soap powder dosage is 50 ~ 60KG/ ton saponification liquors, and saponification liquor temperature is 65 ~ 75
DEG C, dip time of the ERW in saponification liquor is 10 ~ 25 minutes.
As a further improvement on the present invention, the manufacture method also includes surface treatment step, and surface treatment step exists
After Quenching Treatment step, the concrete operations of surface treatment step are：First ERW surface is entered using high temperature compressed air
Row is blown, and removes cooling water, then rust remover spraying is covered in the surface of ERW, finally right again with high temperature compressed air
The surface of ERW is blown, and while rust remover is blown away, high temperature compressed air is by ERW surface residual
Rust remover is dried, and one layer of rust remover diaphragm is formed on the surface of welded tube.
The present invention compared with prior art, has the following advantages that：The torsion beam welding steel of manufacture method processing of the present invention
Pipe intensity is high, good toughness, and weld strength is high, and higher obdurability can be still kept after larger plastic deformation is born.
Embodiment
With reference to specific embodiment, the invention will be further described.
Embodiment 1
The torsion beam of automobile welded still pipe of Φ 103 × 3.5mm specifications is manufactured, is comprised the following steps：
1）, strip cut：Diameter according to needed for torsion beam with welded still pipe product, by thickness 5mm × width of outsourcing
The 1280mm coil of strip strip of slitting into width for 322mm on slitter；The material of the strip is BR1500HS；
2）, pickling processes：By the good strip of slitting successively continually by descaling bath, cold rinse bank and hot water storgae, descaling bath
In pickle use hydrochloric acid, the concentration of hydrochloric acid is 120g/L；Strip is first sent into cold rinse bank after overpickling and uses high pressure water flushing
Wash, the flushing temperature in cold rinse bank is 10 DEG C, flushing pressure 10kg/cm2；Then it is re-fed into hot water storgae to scald, scalds temperature
For 100 DEG C, dried again after going out hot water storgae, drying temperature is 100 DEG C；Strip in hot water storgae passes through descaling bath, cold rinse bank and heat
The speed of tank and the speed of drying are 30m/ minutes,
3）, cold rolling：Strip after pickling carries out cold rolling by milling train, and the thickness of strip welds equal to torsion beam after cold rolling
Thickness needed for tube product subtracts 0.05mm；
4）, roll bending formation and welding：Strip after cold rolling is sent into forming machine round add is made using W brake forming methods
Work, Cheng Yuanhou strip are welded into ERW on welding machine, and welding machine parameter setting is：Bonding power is 190KW, and speed of welding is
18m/min, amount of compression 1.5mm；
5）, weld seam sublimate processing：Welding region is rinsed using high pressure nitrogen in welding process is molded, specially existed
High pressure nitrogen fumarole is installed at welding region 50cm, high pressure nitrogen is full of whole welding region, so as to be to weld
Journey provides gas shield, reduces the generation of oxide inclusion in welding process, improves the exclusion efficiency of slag in weld；Meanwhile
When ERW not yet cools down, using the burr of burring knife milling downhand welding pipe commissure, including the outer hair of welded tube outer surface is removed
Burr inside thorn and welded tube；
6）, phosphatization, saponification process：ERW is immersed in phosphating pond and saponification pond successively, at progress phosphatization, saponification
Reason；Phosphating solution in phosphating pond is the zinc calcium phosphorization liquid that volumetric concentration is 10%, and the temperature of phosphating solution is 75 DEG C, and ERW exists
Dip time in phosphating solution is 25 minutes；Saponification liquor composition in saponification pond includes lubricant, water and soap powder, wherein, lubrication
The mass ratio of agent and water is 1：18, soap powder dosage is 50KG/ ton saponification liquors, and saponification liquor temperature is 75 DEG C, and ERW is in saponification
Dip time in liquid is 10 minutes；ERW after phosphatization, saponification, which is sent into head rolling machine, carries out dog, makes welded pipe end straight
Footpath reaches required size；
7）Cold drawing treatment：ERW is sent into drawbench and carries out cold-drawn, during cold-drawn, clamps the end after pinching processing
Head, while mandrel is inserted in welded tube, then welded tube is passed through the die hole for being less than welded tube external diameter with tapered minimum-value aperture, make
Caliber uniform shrinkage is deformed inside and outside welded tube, is extended on welded tube length direction, and cold-drawn 2 times is carried out according to technological requirement, with
To required size；
8）, Quenching Treatment：ERW after cold drawing treatment is sent into glowing furnace, is heated to 820 DEG C, is incubated 50min, then
Cooled down by way of oil cooling, then ERW is sent into tempering furnace, be heated to 480 DEG C, will welded finally by the mode of water cooling
Pipe cools down；
9）, surface treatment：First ERW surface is blown using high temperature compressed air, removes cooling water, then will
Rust remover sprays the surface for being covered in ERW, and finally the surface of ERW is blown again with high temperature compressed air
Gas, while rust remover is blown away, high temperature compressed air dries the rust remover of ERW surface residual, in the table of welded tube
Face forms one layer of rust remover diaphragm；
10）, verification test：After steel pipe welding prepared by embodiment 1 flattening test reach 90 degree and 0 degree of flat fusion line of total head without
Crackle；Flaring test, enlarging rate >=17%, body（Including weld seam）Do not ftracture；Uniform wall thickness after the follow-up thermoforming of product, punching press,
Stable mechanical property, intensity reach 1500Mpa.
Embodiment 2
The torsion beam of automobile welded still pipe of Φ 103 × 3.5mm specifications is manufactured, is comprised the following steps：
1）, strip cut：Diameter according to needed for torsion beam with welded still pipe product, by thickness 5mm × width of outsourcing
The 1280mm coil of strip strip of slitting into width for 322mm on slitter；The material of the strip is BR1500HS；
2）, pickling processes：By the good strip of slitting successively continually by descaling bath, cold rinse bank and hot water storgae, descaling bath
In pickle use hydrochloric acid, the concentration of hydrochloric acid is 140g/L；Strip is first sent into cold rinse bank after overpickling and uses high pressure water flushing
Wash, the flushing temperature in cold rinse bank is 20 DEG C, flushing pressure 9kg/cm2；Then it is re-fed into hot water storgae to scald, scalding temperature is
95 DEG C, dried again after going out hot water storgae, drying temperature is 110 DEG C；Strip in hot water storgae passes through descaling bath, cold rinse bank and hot water storgae
Speed and drying speed be 35m/ minutes,
3）, cold rolling：Strip after pickling carries out cold rolling by milling train, and the thickness of strip welds equal to torsion beam after cold rolling
Thickness needed for tube product subtracts 0.10mm；
4）, roll bending formation and welding：Strip after cold rolling is sent into forming machine round add is made using W brake forming methods
Work, Cheng Yuanhou strip are welded into ERW on welding machine, and welding machine parameter setting is：Bonding power is 205KW, and speed of welding is
20m/min, amount of compression 1.8mm；
5）, weld seam sublimate processing：Welding region is rinsed using high pressure nitrogen in welding process is molded, specially existed
High pressure nitrogen fumarole is installed at welding region 50cm, high pressure nitrogen is full of whole welding region, so as to be to weld
Journey provides gas shield, reduces the generation of oxide inclusion in welding process, improves the exclusion efficiency of slag in weld；Meanwhile
When ERW not yet cools down, using the burr of burring knife milling downhand welding pipe commissure, including the outer hair of welded tube outer surface is removed
Burr inside thorn and welded tube；
6）, phosphatization, saponification process：ERW is immersed in phosphating pond and saponification pond successively, at progress phosphatization, saponification
Reason；Phosphating solution in phosphating pond is the zinc calcium phosphorization liquid that volumetric concentration is 11%, and the temperature of phosphating solution is 70 DEG C, and ERW exists
Dip time in phosphating solution is 28 minutes；Saponification liquor composition in saponification pond includes lubricant, water and soap powder, wherein, lubrication
The mass ratio of agent and water is 1：19, soap powder dosage is 55KG/ ton saponification liquors, and saponification liquor temperature is 70 DEG C, and ERW is in saponification
Dip time in liquid is 20 minutes；ERW after phosphatization, saponification, which is sent into head rolling machine, carries out dog, makes welded pipe end straight
Footpath reaches required size；
7）Cold drawing treatment：ERW is sent into drawbench and carries out cold-drawn, during cold-drawn, clamps the end after pinching processing
Head, while mandrel is inserted in welded tube, then welded tube is passed through the die hole for being less than welded tube external diameter with tapered minimum-value aperture, make
Caliber uniform shrinkage is deformed inside and outside welded tube, is extended on welded tube length direction, and cold-drawn 2 times is carried out according to technological requirement, with
To required size；
8）, Quenching Treatment：ERW after cold drawing treatment is sent into glowing furnace, is heated to 830 DEG C, is incubated 40min, then
Cooled down by way of oil cooling, then ERW is sent into tempering furnace, be heated to 490 DEG C, will welded finally by the mode of water cooling
Pipe cools down；
9）, surface treatment：First ERW surface is blown using high temperature compressed air, removes cooling water, then will
Rust remover sprays the surface for being covered in ERW, and finally the surface of ERW is blown again with high temperature compressed air
Gas, while rust remover is blown away, high temperature compressed air dries the rust remover of ERW surface residual, in the table of welded tube
Face forms one layer of rust remover diaphragm；
10）, verification test：After steel pipe welding prepared by embodiment 2 flattening test reach 90 degree and 0 degree of flat fusion line of total head without
Crackle；Flaring test, enlarging rate >=17%, body（Including weld seam）Do not ftracture；Uniform wall thickness after the follow-up thermoforming of product, punching press,
Stable mechanical property, intensity reach 1500Mpa.
Embodiment 3
The torsion beam of automobile welded still pipe of Φ 103 × 3.5mm specifications is manufactured, is comprised the following steps：
1）, strip cut：Diameter according to needed for torsion beam with welded still pipe product, by thickness 5mm × width of outsourcing
The 1280mm coil of strip strip of slitting into width for 322mm on slitter；The material of the strip is BR1500HS；
2）, pickling processes：By the good strip of slitting successively continually by descaling bath, cold rinse bank and hot water storgae, descaling bath
In pickle use hydrochloric acid, the concentration of hydrochloric acid is 160g/L；Strip is first sent into cold rinse bank after overpickling and uses high pressure water flushing
Wash, the flushing temperature in cold rinse bank is 30 DEG C, flushing pressure 8kg/cm2；Then it is re-fed into hot water storgae to scald, scalding temperature is
90 DEG C, dried again after going out hot water storgae, drying temperature is 120 DEG C；Strip in hot water storgae passes through descaling bath, cold rinse bank and hot water storgae
Speed and drying speed be 40m/ minutes,
3）, cold rolling：Strip after pickling carries out cold rolling by milling train, and the thickness of strip welds equal to torsion beam after cold rolling
Thickness needed for tube product subtracts 0.15mm；
4）, roll bending formation and welding：Strip after cold rolling is sent into forming machine round add is made using W brake forming methods
Work, Cheng Yuanhou strip are welded into ERW on welding machine, and welding machine parameter setting is：Bonding power is 220KW, and speed of welding is
22m/min, amount of compression 2mm；
5）, weld seam sublimate processing：Welding region is rinsed using high pressure nitrogen in welding process is molded, specially existed
High pressure nitrogen fumarole is installed at welding region 50cm, high pressure nitrogen is full of whole welding region, so as to be to weld
Journey provides gas shield, reduces the generation of oxide inclusion in welding process, improves the exclusion efficiency of slag in weld；Meanwhile
When ERW not yet cools down, using the burr of burring knife milling downhand welding pipe commissure, including the outer hair of welded tube outer surface is removed
Burr inside thorn and welded tube；
6）, phosphatization, saponification process：ERW is immersed in phosphating pond and saponification pond successively, at progress phosphatization, saponification
Reason；Phosphating solution in phosphating pond is the zinc calcium phosphorization liquid that volumetric concentration is 11%, and the temperature of phosphating solution is 65 DEG C, and ERW exists
Dip time in phosphating solution is 30 minutes；Saponification liquor composition in saponification pond includes lubricant, water and soap powder, wherein, lubrication
The mass ratio of agent and water is 1：20, soap powder dosage is 60KG/ ton saponification liquors, and saponification liquor temperature is 65 DEG C, and ERW is in saponification
Dip time in liquid is 25 minutes；ERW after phosphatization, saponification, which is sent into head rolling machine, carries out dog, makes welded pipe end straight
Footpath reaches required size；
7）Cold drawing treatment：ERW is sent into drawbench and carries out cold-drawn, during cold-drawn, clamps the end after pinching processing
Head, while mandrel is inserted in welded tube, then welded tube is passed through the die hole for being less than welded tube external diameter with tapered minimum-value aperture, make
Caliber uniform shrinkage is deformed inside and outside welded tube, is extended on welded tube length direction, and cold-drawn 2 times is carried out according to technological requirement, with
To required size；
8）, Quenching Treatment：ERW after cold drawing treatment is sent into glowing furnace, is heated to 840 DEG C, is incubated 30min, then
Cooled down by way of oil cooling, then ERW is sent into tempering furnace, be heated to 500 DEG C, will welded finally by the mode of water cooling
Pipe cools down；
9）, surface treatment：First ERW surface is blown using high temperature compressed air, removes cooling water, then will
Rust remover sprays the surface for being covered in ERW, and finally the surface of ERW is blown again with high temperature compressed air
Gas, while rust remover is blown away, high temperature compressed air dries the rust remover of ERW surface residual, in the table of welded tube
Face forms one layer of rust remover diaphragm；
10）, verification test：After steel pipe welding prepared by embodiment 3 flattening test reach 90 degree and 0 degree of flat fusion line of total head without
Crackle；Flaring test, enlarging rate >=17%, body（Including weld seam）Do not ftracture；Uniform wall thickness after the follow-up thermoforming of product, punching press,
Stable mechanical property, intensity reach 1500Mpa.
Coil of strip used in the present invention can use coil of strip of the commercially available conventional material for BR1500HS, in above-mentioned each implementation
The coil of strip for Baoshan Iron and Steel Group's production employed in example
Zinc calcium phosphorization liquid used in the present invention can use commercially available conventional Zinc-calcium series phosphatating liquid, in the various embodiments described above
Employed in for Jiangyin brocade it is grand chemical treatment Co., Ltd production zinc calcium phosphorization liquid.
Lubricant used in saponification liquor of the present invention can use commercially available conventional lubricant, in the various embodiments described above
The used lubricant for the production of the factory of Shanghai chemical industry seven.
Claims (6)
1. the manufacture method of torsion beam of automobile welded still pipe, it is characterised in that comprise the following steps：
1）, strip cut：By the wide coil of strip of outsourcing, slitting is into strip on slitter, according to torsion beam welded still pipe product institute
The diameter needed determines the width of strip；
2）, pickling processes：By the good strip of slitting successively continually by descaling bath, cold rinse bank and hot water storgae, in descaling bath
Pickle uses hydrochloric acid, and strip is first sent into cold rinse bank after overpickling and uses high pressure water washing, is then re-fed into hot water storgae and scalds,
Dried again after going out hot water storgae；
3）, cold rolling：Strip after pickling carries out cold rolling by milling train, and the thickness of strip is equal to torsion beam welded still pipe after cold rolling
Thickness needed for product subtracts 0.05 ~ 0.15mm；
4）, roll bending formation and welding：Strip after cold rolling is sent into forming machine round processing is made using W brake forming methods, into
Strip after circle is welded into ERW on welding machine, and welding machine parameter setting is：Bonding power is 190 ~ 220KW, and speed of welding is
18 ~ 22m/min, amount of compression are 1.5 ~ 2mm；
5）, weld seam sublimate processing：Welding region is rinsed using high pressure nitrogen in welding process is molded, specially in distance
High pressure nitrogen fumarole is installed at welding region 50cm, high pressure nitrogen is full of whole welding region, so as to be carried for welding process
Supplied gas is protected, and reduces the generation of oxide inclusion in welding process, improves the exclusion efficiency of slag in weld；Meanwhile in vertical masonry joint
When welded tube not yet cools down, using the burr of burring knife milling downhand welding pipe commissure, including remove welded tube outer surface outer burr and
Burr inside welded tube；
6）, phosphatization, saponification process：ERW is immersed in phosphating pond and saponification pond successively, carries out phosphatization, saponification process, phosphorus
Change, carry out dog in the ERW feeding head rolling machine after saponification, welded pipe end diameter is reached required size；
7）Cold drawing treatment：ERW is sent into drawbench and carries out cold-drawn, during cold-drawn, clamps the termination after pinching processing, together
When mandrel is inserted in welded tube, then make welded tube pass through with tapered minimum-value aperture be less than welded tube external diameter die hole, make welded tube
Inside and outside caliber uniform shrinkage is deformed, and is extended on welded tube length direction, and cold-drawn 1 ~ 3 time is carried out according to different technological requirements,
To obtain required size；
8）, Quenching Treatment：ERW after cold drawing treatment is sent into glowing furnace, is heated to 820 ~ 840 DEG C, is incubated 30 ~ 50min,
Then cooled down by way of oil cooling, then ERW is sent into tempering furnace, 480 ~ 500 DEG C are heated to, finally by water cooling
Mode cools down welded tube.
2. the manufacture method of torsion beam of automobile welded still pipe as claimed in claim 1, it is characterised in that：The step 1）In
Coil of strip material be BR1500HS.
3. the manufacture method of torsion beam of automobile welded still pipe as claimed in claim 1, it is characterised in that：The step 2）
In, the concentration of hydrochloric acid is 120 ~ 160g/L in descaling bath；Flushing temperature in cold rinse bank is 10 ~ 30 DEG C, flushing pressure is 8 ~
10kg/cm2；Temperature is scalded as 90 ~ 100 DEG C in hot water storgae；Strip passes through descaling bath, the speed of cold rinse bank and hot water storgae and baking
Dry speed is 30 ~ 40m/ minutes, and drying temperature is 100 ~ 120 DEG C.
4. the manufacture method of torsion beam of automobile welded still pipe as claimed in claim 1, it is characterised in that：The step 6）In
Phosphating solution be zinc calcium phosphorization liquid that volumetric concentration is 10 ~ 11%, the temperature of phosphating solution is 65 ~ 75 DEG C, and ERW is in phosphating solution
In dip time be 25 ~ 30 minutes.
5. the manufacture method of torsion beam of automobile welded still pipe as claimed in claim 1, it is characterised in that：The step 6）In
Saponification liquor composition include lubricant, water and soap powder, wherein, the mass ratio of lubricant and water is 1：（18~20）, soap powder dosage is
50 ~ 60KG/ ton saponification liquors, saponification liquor temperature are 65 ~ 75 DEG C, and dip time of the ERW in saponification liquor is 10 ~ 25 minutes.
6. the manufacture method of torsion beam of automobile welded still pipe as claimed in claim 1, it is characterised in that：The manufacture method
Also include surface treatment step, after Quenching Treatment step, the concrete operations of surface treatment step are surface treatment step：First
ERW surface is blown using high temperature compressed air, removes cooling water, then rust remover spraying is covered in straight weld
The surface of pipe, finally the surface of ERW is blown again with high temperature compressed air, while rust remover is blown away,
High temperature compressed air dries the rust remover of ERW surface residual, and one layer of rust remover diaphragm is formed on the surface of welded tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610684761.2A CN106216957B (en) | 2016-08-18 | 2016-08-18 | The manufacture method of torsion beam of automobile welded still pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610684761.2A CN106216957B (en) | 2016-08-18 | 2016-08-18 | The manufacture method of torsion beam of automobile welded still pipe |
Publications (2)
| Publication Number | Publication Date |
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| CN106216957A CN106216957A (en) | 2016-12-14 |
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| CN107419065B (en) * | 2017-07-24 | 2019-01-01 | 天人汽车底盘（芜湖）股份有限公司 | The closed torsion beam integral quenching technique of car |
| EP3693096A4 (en) * | 2017-10-04 | 2021-06-23 | Nippon Steel Corporation | Torsion beam manufacturing method and torsion beam manufacturing device |
| CN108034802A (en) * | 2018-01-11 | 2018-05-15 | 江苏神猴钢绳开发有限公司 | The heat treatment method and its production equipment of a kind of steel wire |
| CN108339863A (en) * | 2018-02-06 | 2018-07-31 | 陈建平 | A kind of method of cold-drawn air-conditioner compressor outer housing |
| CN109366111A (en) * | 2018-12-29 | 2019-02-22 | 无锡苏嘉法斯特汽车零配件有限公司 | A kind of manufacturing method of CP800 torsion beam welded tube |
| CN110170803A (en) * | 2019-06-14 | 2019-08-27 | 泰州市长征冷机管件有限公司 | A kind of welding procedure for interior exhaust coil pack |
| CN110757098A (en) * | 2019-09-20 | 2020-02-07 | 滁州市友邦涂装有限公司 | Production process of U-shaped pipe clamp with good wear resistance |
| CN117415225B (en) * | 2023-12-19 | 2024-02-13 | 淄博吉利新能源商用车发展有限公司 | Spare part equipment of bending for cargo vehicle |
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