CN108453475A - The production technology of press-fit steel ring - Google Patents
The production technology of press-fit steel ring Download PDFInfo
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- CN108453475A CN108453475A CN201810384142.0A CN201810384142A CN108453475A CN 108453475 A CN108453475 A CN 108453475A CN 201810384142 A CN201810384142 A CN 201810384142A CN 108453475 A CN108453475 A CN 108453475A
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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
Abstract
The invention discloses a kind of production technologies of press-fit steel ring, include the following steps, raw material coil of strip is used into the blanking coil of strip that the sub-cut of longitudinal shearing slitting equipment is required at press-fit steel ring standard specification, by blanking coil of strip by the way that tubular blank is made by moulding process after uncoiling, flattening, tubular blank is delivered in electric resistance welding equipment, it is continuously welded, and synchronization process scrapes downhand weld, press-fit steel ring disjunctor blank is made；Press-fit steel ring disjunctor blank finished product obtained is cut into the press-fit monomer blank of single-piece using cutting equipment；Finishing is carried out to press-fitting obtained circle monomer blank and eliminates stress, obtains stable processing monomer blank；The processing monomer blank for obtaining stable is ground to Rack, obtains press-fit steel ring finished product.Present invention reduces cost, entire production process technology node is few, and recruitment is few, and weld seam consistency and stability are high, the steel ring single-piece yields significant increase processed.
Description
Technical field
The present invention relates to press-fit solid tyre accessories, the more particularly to production technology of steel ring.
Background technology
Press-fit solid tyre（GB/T16623-2008）, it is mainly used in the engineering equipment and mine code of low speed heavy－duty
Driving wheel in head apparatus and driven wheel.The major consumers market overseas market flourishing in mining industry prosperity and circulation, main pressure
Manufacturing enterprise with formula solid tyre is also several big rubber for tire manufacturing enterprises in the world, is distributed in Sri Lanka,
The U.S., Canada etc..China is not press-fit solid tyre major producing country, and the press-fit steel ring of domestic production is mainly in face of being
The large-scale press-fit solid tyre of external several manufacturing enterprise.
Due to the manufacturing industry of greatly developing after China's reform, guidance of the Chinese raw material in the industrial policy of country
Under in the world have very strong price competitiveness, Chinese labour is cheap, thus domestic product using steel plate as raw material
Press-fit steel ring have very strong price competitiveness in the world.International press-fit steel ring manufacturing enterprise all can not be in
State's competition among enterprises, the U.S. is only left by press-fit steel ring manufacturing enterprise in the world now and Sri Lanka is each one surplus, but they
The steel plate used also has most of in China's buying.
But the adjustment of Chinese national development strategy planning also has the variation of external circumstances, to the press-fit steel ring of China
The long term growth of manufacturing enterprise brings stern challenge.
Currently all press-fit steel ring manufacturing enterprise is also in the production technology for continuing to use pervious common steel ring：It will open after putting down
Steel plate passes through multiple sub-cut, obtains the batten of single-piece, and then the batten of single-piece is by starting, pressing word, circle circle, counterpart, leveling
The processes such as weld bond, welding, shaping, expansion, metal working.So the production technology standard control node of the prior art is more, process is more, people
Member's recruitment is more, waste of material etc..
Single-piece is processed due to being, so the control of each steel ring processing quality in process of production is to accomplishing unification
It is very difficult.For example, the production of the press-fit steel ring of different size will use two or more different welding methods, such as submerged-arc welding
It connects or butt welding.The consistency and stability of this butt welding joint stabilizing process bring great difficulty.Especially in 5 to 8 cun small of production
In the production of specification press-fit steel ring, it can only be connect using manual electric arc welding, and human weld had both increased production process and artificial
Cost, but because the weld defect of human weld reduces the yields of product.
Since the prior art is single-piece work, so each link is required to manual operation, entire production process occupies big
Amount is artificial, and the wage of skilled worker rose steadily in recent years, so personnel's wage cost has accounted for the ratio of product cost
Also bigger, recruit the cost of masterful technique work especially electric welder even more high.
Environmental protection and sustainable development are the big targets that can't steer clear of on country and all manufacturing industry enterprise development roads.And
The production process power consumption of single-piece work is high in the prior art, and the residual cigarette of welding and iron oxide dust in welding process drift
It is more.Since single-piece is welded, so welding sequence takes up a large area, the operation position dispersion of each worker, so smoke contamination
Area is big, and dedusting smoke abatement is difficult big.Have to face in the today and press-fit steel ring manufacturing enterprise for increasingly focusing on environmental protection
Environmental issue, the protection to environment be press-fit steel ring manufacturing enterprise in addition to for social creativity wealth, product and employment with
Outer maximum social responsibility, press-fit steel ring manufacturing enterprise will accomplish something and reform improvement in terms of environmental protection.
For synthesis, there are two special to evaluate for the standard of the production technology characteristic of press-fit steel ring machine-building at present
Point：
1. product structure is simple, production Technology content is low；
2. product standard is harsh, controlling of production process requires high.
With low content of technology refers to that product reaches appearance in production and the processing of physical size is simple.But the control of technique
Critically important in process of production, the standard of technique directly affects many standard parameters of the product in the use in later stage, such as from
The internal stress that appearance can't see, pressure range when press-fitting uses, the degree etc. of interference fit.These features make product in technique control
Strict demand in system seems extremely important.But press-fit steel ring manufacturing enterprise sets press-fit steel ring product in technology now
It can not be improved in terms of meter, because national standard has made this stringent regulation, to the product raw material of press-fit steel ring
The replacement that makes a search is being also that can not possibly complete at present.Research innovation only so is carried out to the technique of press-fit steel ring, comes face
The challenge of competition and environmental protection to market.These are all the immense pressure and challenge that press-fit steel ring manufacturing enterprise faces,
The backwardness of original press-fit steel ring production technology and the drawbacks of gradually showing are to cause these pressure and the principal element of challenge.
Invention content
In order to overcome drawbacks described above, the present invention provides a kind of press-fit steel ring production technologies, substitute the prior art, production
Standard compliant press-fit steel ring, but production technology is compared with prior art, the waste material generated in production process is few, entire technique
Low energy consumption, and production joint stability obtained is more preferable.
The invention is realized by the following technical scheme：
The production technology of press-fit steel ring, includes the following steps,
Step 1, blanking：
Raw material coil of strip is used into the blanking coil of strip that the sub-cut of longitudinal shearing slitting equipment is required at press-fit steel ring standard specification, the width of blanking
Spend W computational methods：
W=[(D+T)×3.14]+G
Wherein：D is the press-fitting face internal diameter of press-fit steel ring standardized product, and T is material gauges, and G subtracts for the material of blanking is
Number；
Step 2, it is molded and welds：
By the blanking coil of strip of width W in step 1 by the way that tubular blank is made by moulding process after uncoiling, flattening, by tubulose base
Part is delivered in electric resistance welding equipment, is continuously welded, and synchronization process scrapes downhand weld, and press-fit steel ring disjunctor blank is made；
Step 3, it cuts：
Press-fit steel ring disjunctor blank finished product made from step 2 is cut into the press-fit monomer base of single-piece using cutting equipment
Part；
Step 4, finishing：
Finishing is carried out to press-fitting circle monomer blank obtained in step 3 and eliminates stress, obtains stable processing monomer blank；
Step 5, finished product：
Stable processing monomer blank Vehicle Processing will be obtained in step 4 to Rack, obtains press-fit steel ring finished product.
It is that by welding equipment, experiment obtains under weld parameters fixed, and passes through generation again after verification that the material, which subtracts coefficient G,
Entering to calculate and use, the computational methods that the material subtracts coefficient G are,
G=(G1+G2)/2,
Wherein：G is that the material of blanking subtracts coefficient, and G1 is the minimum coefficient value that welding equipment obtains under weld parameters fixed, and G2 is
The maximum coefficient value that welding equipment obtains under weld parameters fixed；
Wherein, the computational methods of G1 are,
G1=(L1+L2)-L3,
Wherein, L1 is the cutting length of test specimen one before experiment welding, and L2 is the cutting length of test specimen two before experiment welding, and L3 is weldering
The sum of the length of test specimen one and test specimen two after connecing；
Wherein, the computational methods of G2 are,
G2=(L1’+L2’)-L3’
Wherein, L1 ' is the cutting length of test specimen three before experiment welding, and L2 ' is the cutting length of test specimen four before experiment welding, L3 '
For the sum of the length of test specimen three and test specimen four after welding.
Described L3, L3 ' value be equal to welding equipment weld when maximum upset stroke length.
The Numerical Validation method that the material subtracts coefficient G is,
Step a. is expanded using forging equipment assembly stretches test mould, and experiment press-fit steel ring finished product is extended to from normal diameter expansion
Minimum value DY or maximum value DY '；
Step b. expansions check that weld appearance without cracking, uses zero defect inside ultrasound detection weld seam after stretching；
Step c. reaches that above two standards are all qualified, assert that material subtracts the numerical value of coefficient G and takes and test qualification.
The minimum value DY=[DB × (100%+2%)], the maximum value DY '=[DB × (100%+3%)], wherein DB are examination
Test the normal diameter with press-fit steel ring finished product.
In the step 3, the width for cutting into the press-fit monomer blank of single-piece is Wp, the standard of press-fit steel ring finished product
Width is Wb, cuts into press-fit monomer blank width Wp=Wb+2Lj of single-piece, wherein：Lj is unilateral allowance, Lj
Value is 3mm.
In the step 2, the welding heat affected zone of press-fit steel ring disjunctor blank is 25.4mm, and weld seam inside height is
0/-0.3mm, outside height are to 0/+1.2mm, and id tolerance is ± 0.2mm, ovality 0.8-1.8mm.
In the step 2, moulding process includes the following steps,
Step a, steel plate are preformed into lower camber side；
Step b increases molding cambered surface, eliminates rebound stress；
Step c is molded prewelding blank, eliminates stress before welding；
Step d, precisive shaped, the face of weld adjust welding surface angle to flat alignment.
Beneficial effects of the present invention：
Present invention reduces cost, entire production process technology node is few, and recruitment is few.From coil of strip to disjunctor blank, then arrive monomer
Blank, entire production technology can be thus achieved using a production line.It need not be as coil of strip be shown laid flat in the prior art
Steel plate, then sub-cut are several battens, and each batten is then processed as steel ring again.There are 13 technique processes in the prior art, wraps
Include shear, typewriting（Mark）, circle circle, counterpart, pressing, welding, plane slag, rolling, full circle, polishing grind seam, expansion, metalworking, inspection
It tests, full producing line needs 28 to 35 people of recruitment, and process is complicated, and the amount of labour used is big.
High degree of automation of the present invention from coil of strip to disjunctor blank, then arrives monomer blank, the circle in entire production technology
Circle, welding and cutting, all without manual operation.And the high degree of automation of the present invention, entire production technology only have 5 works
Sequence, full producing line recruitment only 12 to 18 people, recruitment cost just save 48%-57%.
Steel ring single-piece quality consistency produced by the invention and stability are good, from coil of strip to disjunctor blank, due to being continuous
Production, the continuity of blank quality is good, and weld seam consistency and stability are high, and the steel ring single-piece yields processed greatly carries
It rises.
The useless clout that the present invention generates is few, reduces energy consumption, reduces the discharge for welding residual cigarette and metallic dust.With
The prior art is compared, and steel comprehensive utilization ratio improves 6% or so, the material comprehensive utilization ratio 87%-90% of the prior art, and originally
Invention production technology material comprehensive utilization ratio 93%-96%.
By taking specification is the press-fit steel ring product of 8 × 12.125, thickness 8mm as an example, in the prior art, welding 100
Time is 10 seconds × 100=16.66 minutes, welder power 800KVA, per hour electric quantity consumption 800KW, then welds 100
Electricity consumption be（800/60）×16.66=222.13KW；And the length that production technology of the present invention welds 100 is（8×25.4）
× 100=20.32 meters, welder power 800KVA, per hour electric quantity consumption be 800KW, the continuous speed of welding of welding machine be 22 meters/
Minute, then the electricity consumption of welding 100 is（800/60）×（20.32/22）=12.31KW.So production technology of the present invention
Electricity than the production technology saving of the prior art is 222.13-12.31=209.82KW.
It is limited by the production technology of the prior art, various processes scattering device, especially welding procedure, in order to improve life
Efficiency is produced, needs that several stations are arranged to be carried out at the same time weld job, therefore water spray dedusting can not be used, can not concentrate makes
It is discharged fume with exhaust fan, so welding process has and largely welds residual cigarette and metallic dust drifts in workshop.And the present invention produces
Technique welding process is that a production line of uncoiling, flattening, molding and welding is worked continuously, and weldering may be used in the entire production line
Water cooling or spray for dust suppression technique afterwards, entire production process environmental protection, smoke dust discharge comply fully with environment protection emission requirement.
Specific implementation mode
The production technology of press-fit steel ring, includes the following steps,
Step 1, blanking：
Raw material coil of strip is used into the blanking coil of strip that the sub-cut of longitudinal shearing slitting equipment is required at press-fit steel ring standard specification, the width of blanking
Spend W computational methods：
W=[(D+T)×3.14]+G
Wherein：D is the press-fitting face internal diameter of press-fit steel ring standardized product, and T is material gauges, and G subtracts for the material of blanking is
Number.
Slitting machine is used for silicon steel sheet, aluminium volume, galvanization roll, stainless steel, the winding plank such as straight carbon steel in the prior art
The strip of several width is cut into along its length.In the present embodiment, be several width by raw material coil of strip longitudinal shearing slitting it is W's
Strip, it is next process blanking coil of strip to be used then to be wound again by winder again.
It is the experiment acquirement under weld parameters fixed by existing welding equipment that material in the present embodiment, which subtracts coefficient G, and
It is used by substituting into calculate again after verification, the computational methods which subtracts coefficient G are：G=(G1+G2)/2,
G1 therein is the minimum coefficient value that welding equipment obtains under weld parameters fixed, and G2 is that welding equipment is welded fixed
The maximum coefficient value obtained under parameter.
The computational methods of G1 are：G1=(L1+L2)-L3, L1 therein are the cutting length of test specimen one before experiment welding, L2
The cutting length of test specimen two before being welded for experiment, L3 are the sum of the length of the test specimen one and test specimen two after welding；
The computational methods of G2 are：G2=(L1 '+L2 ')-L3 ', L1 ' therein are the cutting length of test specimen three before experiment welding, L2 '
The cutting length of test specimen four before being welded for experiment, L3 ' are the sum of the length of the test specimen three and test specimen four after welding.
Described L3, L3 ' value be equal to welding equipment weld when maximum upset stroke length.According to《Welding resistance resistance welder
Mechanically and electrically require》The 3.2.12 articles of definition in GB/T8366-2004, upset stroke are minimum and maximum jaw apart from it
Difference.
By the soldering test of two groups of test specimens, calculated material subtracts coefficient, takes its average value.In practical operation, if condition
The needs of permission or production requirement can subtract coefficient G's by soldering test more than two to obtain more accurate material
Numerical value.
Material subtracts after coefficient G is calculated, it is also necessary to actual verification is carried out to the numerical value, the method for verification is,
Step a. is expanded using forging equipment assembly stretches test mould, and experiment press-fit steel ring finished product is extended to from normal diameter expansion
Minimum value DY or maximum value DY '；
Step b. expansions check that weld appearance without cracking, uses zero defect inside ultrasound detection weld seam after stretching；
Step c. reaches that above two standards are all qualified, assert that material subtracts the numerical value of coefficient G and takes and test qualification.
It is by expanding the press-fitting face inner circumferential length progress for stretching mold to press-fit steel ring finished product in the step a of verification process
Expansion is stretched, and is reached《Welding point stretching test method》GB/T2651-2008 and《Metal material stretching test part 1：Room
Warm test method》In GB/T228.1-2010 after the standard of elongation and zero defect is it is assumed that the material numerical value that subtracts coefficient G is qualified.
Wherein minimum value DY=[DB × (100%+2%)], maximum value DY '=[DB × (100%+3%)], and DB presses for experiment
Normal diameter with formula steel ring finished product, i.e., the press-fitting face internal diameter D of the press-fit steel ring standardized product in step 1.
In practical operation, the hydraulic press of the model YQ32-630 produced by Nantong Metalforming Equipment Co., Ltd. fills
Standby expand stretches test mould, i.e., steel ring expands mold section, at least 12 mold sections is used to carry out augmentation test, to ensure that steel ring is expanded
When its be press-fitted face all directions uniform force.
Step 2, it is molded and welds：
By the blanking coil of strip of width W in step 1 by the way that tubular blank is made by moulding process after uncoiling, flattening, by tubulose base
Part is delivered in electric resistance welding equipment, is continuously welded, and synchronization process scrapes downhand weld, and press-fit steel ring disjunctor blank is made.
The uncoiling of blanking coil of strip, flattening process are to utilize uncoiler in the prior art, kink and levelling machine, are molded work
Skill is best using row-roll forming process technique in the prior art.Specifically include the following steps,
Step a, steel plate are preformed into lower camber side；
Step b increases molding cambered surface, eliminates rebound stress；
Step c is molded prewelding blank, eliminates stress before welding；
Step d, precisive shaped, the face of weld adjust welding surface angle to flat alignment.
In step 2, processing claimed below, press-fit steel ring are pressed to weld seam using weld seam processing equipment in the prior art
The welding heat affected zone of disjunctor blank is 25.4mm, and weld seam inside height is 0/-0.3mm, i.e., with the interior press-fitting of press-fit steel ring
Face on the basis of face, weld seam inner surface are not less than the interior press-fitting face 0.3mm of press-fit steel ring.Outside height be to 0/+1.2mm,
I.e. by press-fit steel ring it is outer wrap up in glue surface on the basis of face, weld seam outer surface wraps up in glue surface 1.2mm not higher than the outer of press-fit steel ring.
Id tolerance is ± 0.2mm, ovality 0.8-1.8mm.
Step 3, it cuts：
Press-fit steel ring disjunctor blank finished product made from step 2 is cut into the press-fit monomer base of single-piece using cutting equipment
Part.
The width for cutting into the press-fit monomer blank of single-piece is Wp, and the normal width of press-fit steel ring finished product is Wb, is cut
It is cut into press-fit monomer blank width Wp=Wb+2Lj of single-piece, wherein：Lj is unilateral allowance, and Lj values are 3mm.Add
Loss when spare time amount is to prepare for being machined to the both sides of the face of press-fit monomer blank in next process.
Step 4, finishing：
Finishing is carried out to press-fitting circle monomer blank obtained in step 3 and eliminates stress, obtains stable processing monomer blank；
Step 5, finished product：
Stable processing monomer blank Vehicle Processing will be obtained in step 4 to Rack, obtains press-fit steel ring finished product.
Following difference embodiment is the parameter of the press-fit steel ring for producing different size actually used and specifically measure
Numerical value, specific steps are then omitted and are not stated.
Embodiment 1
Produce 5 × 5 inches of press-fit steel rings, it is first determined the material of blanking subtracts the numerical value of coefficient G.
Specific steps no longer state that L1 200mm, L2 200mm, L3 393mm, the numerical value for obtaining G1 is 7mm；L1’
It is 200mm for 200mm, L2 ', L3 ' is 391mm, obtains the numerical value 9mm of G2；The material that blanking is so calculated subtracts coefficient G and is
8mm,
Verification material subtracts coefficient G：
Experiment finished product normal diameter DB is 126.5 ± 0.2mm, and ± 0.2mm is the error range allowed by standard requirement.It calculates
DY129mm, DY ' 130.3mm are obtained, so the numerical value that material subtracts coefficient G meets the requirements for 8mm.
Specification product press-fitting is 126.5mm with face internal diameter D, and material gauges T is 8mm, and it is 8mm to substitute into material to subtract coefficient G,
The width W for obtaining blanking is 430.33mm.
Level weld seam requirement in the present embodiment is, the welding heat affected zone standard that press-fit steel ring disjunctor blank is made be less than
25.4mm, weld seam inside height are 0/-0.3mm, and outside height is to 0/+1.3mm, and id tolerance is ± 0.2mm, and ovality is
0.8mm。
The press-fit steel ring single piece rough Cutting Length obtained after press-fit steel ring disjunctor blank cutting, which is made, is
The normal width Wb of Wp133mm, press-fit steel ring finished product are 127mm, and allowance Lj is 3mm.
Stable processing monomer blank forming will be obtained to Rack, obtain specification：5 × 5 inches of press-fit steel rings.
Product inspection result made from the present embodiment is as follows, meets product standard：
Embodiment 2
Produce 5 × 6.5 inches of press-fit steel rings, it is first determined the material of blanking subtracts the numerical value of coefficient G.
Specific steps no longer state that L1 200mm, L2 200mm, L3 393mm, the numerical value for obtaining G1 is 7mm；L1’
It is 200mm for 200mm, L2 ', L3 ' is 391mm, obtains the numerical value 9mm of G2；The material that blanking is so calculated subtracts coefficient G and is
8mm,
Verification material subtracts coefficient G：
Experiment finished product normal diameter DB is 164.6 ± 0.2mm, and ± 0.2mm is the error range allowed by standard requirement.It calculates
DY167.89mm, DY ' 169.53mm are obtained, so the numerical value that material subtracts coefficient G meets the requirements for 8mm.
Specification product press-fitting is 164.6mm with face internal diameter D, and material gauges T is 8mm, and it is 8mm to substitute into material to subtract coefficient G,
The width W for obtaining blanking is 549.96mm.
Level weld seam requirement in the present embodiment is, the welding heat affected zone standard that press-fit steel ring disjunctor blank is made be less than
25.4mm, weld seam inside height are 0/-0.3mm, and outside height is to 0/+1.3mm, and id tolerance is ± 0.2mm, and ovality is
0.8mm。
The press-fit steel ring single piece rough Cutting Length obtained after press-fit steel ring disjunctor blank cutting, which is made, is
Wp133mm, press-fit steel ring finished product normal width Wb are 127mm, and allowance Lj is 3mm.
The processing monomer blank for obtaining stable is ground to Rack, obtains specification：5 × 6.5 inches of press-fit steel rings.
Product inspection result made from the present embodiment is as follows, meets product standard：
Embodiment 3
Produce 5.5 × 8 inches of press-fit steel rings, it is first determined the material of blanking subtracts the numerical value of coefficient G.
Specific steps no longer state that L1 200mm, L2 200mm, L3 393mm, the numerical value for obtaining G1 is 7mm；L1’
It is 200mm for 200mm, L2 ', L3 ' is 391mm, obtains the numerical value 9mm of G2；The material that blanking is so calculated subtracts coefficient G and is
8mm,
Verification material subtracts coefficient G：
Experiment finished product normal diameter DB is 202.7 ± 0.2mm, and ± 0.2mm is the error range allowed by standard requirement.It calculates
DY206.75mm, DY ' 208.78mm are obtained, so the numerical value that material subtracts coefficient G meets the requirements for 8mm.
Specification product press-fitting is 202.7mm with face internal diameter D, and material gauges T is 8mm, and it is 8mm to substitute into material to subtract coefficient G,
The width W for obtaining blanking is 669.6mm.
Level weld seam requirement in the present embodiment is, the welding heat affected zone standard that press-fit steel ring disjunctor blank is made be less than
25.4mm, weld seam inside height are 0/-0.3mm, and outside height is to 0/+1.3mm, and id tolerance is ± 0.2mm, and ovality is
1.0mm。
The press-fit steel ring single piece rough Cutting Length obtained after press-fit steel ring disjunctor blank cutting, which is made, is
Wp145.7mm, press-fit steel ring finished product normal width Wb are 139.7mm, and allowance Lj is 3mm.
Stable processing monomer blank forming will be obtained to Rack, obtain specification：5.5 × 8 inches of press-fit steel rings.
Product inspection result made from the present embodiment is as follows, meets product standard：
Embodiment 4
Produce 5 × 10.5 inches of press-fit steel rings, it is first determined the material of blanking subtracts the numerical value of coefficient G.
Specific steps no longer state that L1 200mm, L2 200mm, L3 391mm, the numerical value for obtaining G1 is 9mm；L1’
It is 200mm for 200mm, L2 ', L3 ' is 389mm, obtains the numerical value 11mm of G2；The material that blanking is so calculated subtracts coefficient G and is
10mm,
Verification material subtracts coefficient G：
Experiment finished product normal diameter DB is 266.1 ± 0.2mm, and ± 0.2mm is the error range allowed by standard requirement.It calculates
DY271.42mm, DY ' 274mm are obtained, so the numerical value that material subtracts coefficient G meets the requirements for 8mm.
Specification product press-fitting is 266.1mm with face internal diameter D, and material gauges T is 8mm, and substitution material subtracts coefficient G and is
10mm, the width W for obtaining blanking are 870.67mm.
Level weld seam requirement in the present embodiment is, the welding heat affected zone standard that press-fit steel ring disjunctor blank is made be less than
25.4mm, weld seam inside height are 0/-0.3mm, and outside height is to 0/+1.3mm, and id tolerance is ± 0.2mm, and ovality is
1.0mm。
The press-fit steel ring single piece rough Cutting Length obtained after press-fit steel ring disjunctor blank cutting, which is made, is
Wp133mm, press-fit steel ring finished product normal width Wb are 127mm, and allowance Lj is 3mm.
The processing monomer blank for obtaining stable is ground to Rack, obtains specification：5 × 10.5 inches of press-fit steel
Circle.
Product inspection result made from the present embodiment is as follows, meets product standard：
Embodiment 5
Produce 5 × 11.25 inches of press-fit steel rings, it is first determined the material of blanking subtracts the numerical value of coefficient G.
Specific steps no longer state that L1 200mm, L2 200mm, L3 391mm, the numerical value for obtaining G1 is 9mm；L1’
It is 200mm for 200mm, L2 ', L3 ' is 389mm, obtains the numerical value 11mm of G2；The material that blanking is so calculated subtracts coefficient G and is
10mm,
Verification material subtracts coefficient G：
Experiment finished product normal diameter DB is 285.1 ± 0.2mm, and ± 0.2mm is the error range allowed by standard requirement.It calculates
D Y290.8mm, DY ' 293.65mm are obtained, so the numerical value that material subtracts coefficient G meets the requirements for 10mm.
Specification product press-fitting is 285.1mm with face internal diameter D, and material gauges T is 8mm, and substitution material subtracts coefficient G and is
10mm, the width W for obtaining blanking are 930.33mm.
Level weld seam requirement in the present embodiment is, the welding heat affected zone standard that press-fit steel ring disjunctor blank is made be less than
25.4mm, weld seam inside height are 0/-0.3mm, and outside height is to 0/+1.3mm, and id tolerance is ± 0.2mm, and ovality is
1.2mm。
The press-fit steel ring single piece rough Cutting Length obtained after press-fit steel ring disjunctor blank cutting, which is made, is
Wp133mm, press-fit steel ring finished product normal width Wb are 127mm, and allowance Lj is 3mm.
The processing monomer blank for obtaining stable is ground to Rack, obtains specification：5 × 11.25 inches of press-fit steel
Circle.
Product inspection result made from the present embodiment is as follows, meets product standard：
Embodiment 6
Produce 8 × 12.125 inches of press-fit steel rings, it is first determined the material of blanking subtracts the numerical value of coefficient G.
Specific steps no longer state that L1 200mm, L2 200mm, L3 388mm, the numerical value for obtaining G1 is 12mm；L1’
It is 200mm for 200mm, L2 ', L3 ' is 386mm, obtains the numerical value 14mm of G2；The material that blanking is so calculated subtracts coefficient G and is
13mm,
Verification material subtracts coefficient G：
Experiment finished product normal diameter DB is 307.6 ± 0.2mm, and ± 0.2mm is the error range allowed by standard requirement.It calculates
D Y313.75mm, DY ' 316.82mm are obtained, so the numerical value that material subtracts coefficient G meets the requirements for 13mm.
Specification product press-fitting is 307.6mm with face internal diameter D, and material gauges T is 8mm, and it is 13m to substitute into material to subtract coefficient G,
The width W for obtaining blanking is 1003.98mm.
Level weld seam requirement in the present embodiment is, the welding heat affected zone standard that press-fit steel ring disjunctor blank is made be less than
25.4mm, weld seam inside height are 0/-0.3mm, and outside height is to 0/+1.3mm, and id tolerance is ± 0.2mm, and ovality is
1.2mm。
The press-fit steel ring single piece rough Cutting Length obtained after press-fit steel ring disjunctor blank cutting, which is made, is
Wp209.2mm, press-fit steel ring finished product normal width Wb are 203.2mm, and allowance Lj is 3mm.
The processing monomer blank for obtaining stable is ground to Rack, obtains specification：8 × 12.125 inches of press-fit steel
Circle.
Product inspection result made from the present embodiment is as follows, meets product standard：
Embodiment 7
Produce 7 × 15 inches of press-fit steel rings, it is first determined the material of blanking subtracts the numerical value of coefficient G.
Specific steps no longer state that L1 200mm, L2 200mm, L3 386mm, the numerical value for obtaining G1 is 14mm；L1’
It is 200mm for 200mm, L2 ', L3 ' is 378mm, obtains the numerical value 22mm of G2；The material that blanking is so calculated subtracts coefficient G and is
18mm,
Verification material subtracts coefficient G：
Experiment finished product normal diameter DB is 380.1 ± 0.2mm, and ± 0.2mm is the error range allowed by standard requirement.It calculates
D Y387.7mm, DY ' 391.5mm are obtained, so the numerical value that material subtracts coefficient G meets the requirements for 18mm.
Specification product press-fitting is 380.1mm with face internal diameter D, and material gauges T is 8mm, and it is 18m to substitute into material to subtract coefficient G,
The width W for obtaining blanking is 1236.63mm.
Level weld seam requirement in the present embodiment is, the welding heat affected zone standard that press-fit steel ring disjunctor blank is made be less than
25.4mm, weld seam inside height are 0/-0.3mm, and outside height is to 0/+1.3mm, and id tolerance is ± 0.2mm, and ovality is
1.2mm。
The press-fit steel ring single piece rough Cutting Length obtained after press-fit steel ring disjunctor blank cutting, which is made, is
Wp183.8mm, press-fit steel ring finished product normal width Wb are 177.8mm, and allowance Lj is 3mm.
The processing monomer blank for obtaining stable is ground to Rack, obtains specification：7 × 15 inches of press-fit steel rings.
Product inspection result made from the present embodiment is as follows, meets product standard：
Embodiment 8
Produce 8 × 16 inches of press-fit steel rings, it is first determined the material of blanking subtracts the numerical value of coefficient G.
Specific steps no longer state that L1 200mm, L2 200mm, L3 386mm, the numerical value for obtaining G1 is 14mm；L1’
It is 200mm for 200mm, L2 ', L3 ' is 378mm, obtains the numerical value 22mm of G2；The material that blanking is so calculated subtracts coefficient G and is
18mm,
Verification material subtracts coefficient G：
Experiment finished product normal diameter DB is 405.5 ± 0.2mm, and ± 0.2mm is the error range allowed by standard requirement.It calculates
D Y413.6mm, DY ' 417.66mm are obtained, so the numerical value that material subtracts coefficient G meets the requirements for 18mm.
Specification product press-fitting is 405.5mm with face internal diameter D, and material gauges T is 8mm, and it is 18m to substitute into material to subtract coefficient G,
The width W for obtaining blanking is 1316.39mm.
Level weld seam requirement in the present embodiment is, the welding heat affected zone standard that press-fit steel ring disjunctor blank is made be less than
25.4mm, weld seam inside height are 0/-0.3mm, and outside height is to 0/+1.3mm, and id tolerance is ± 0.2mm, and ovality is
1.2mm。
The press-fit steel ring single piece rough Cutting Length obtained after press-fit steel ring disjunctor blank cutting, which is made, is
Wp209.2mm, press-fit steel ring finished product normal width Wb are 203.2mm, and allowance Lj is 3mm.
The processing monomer blank for obtaining stable is ground to Rack, obtains specification：8 × 16 inches of press-fit steel rings.
Product inspection result made from the present embodiment is as follows, meets product standard：
Embodiment 9
Produce 10 × 22 inches of press-fit steel rings, it is first determined the material of blanking subtracts the numerical value of coefficient G.
Specific steps no longer state that L1 200mm, L2 200mm, L3 386mm, the numerical value for obtaining G1 is 14mm；L1’
It is 200mm for 200mm, L2 ', L3 ' is 378mm, obtains the numerical value 22mm of G2；The material that blanking is so calculated subtracts coefficient G and is
18mm,
Verification material subtracts coefficient G：
Experiment finished product normal diameter DB is 557.7 ± 0.2mm, and ± 0.2mm is the error range allowed by standard requirement.It calculates
D Y568.85mm, DY ' 574.43mm are obtained, so the numerical value that material subtracts coefficient G meets the requirements for 18mm.
Specification product press-fitting is 557.7mm with face internal diameter D, and material gauges T is 8mm, and it is 18m to substitute into material to subtract coefficient G,
The width W for obtaining blanking is 1794.29mm.
Level weld seam requirement in the present embodiment is, the welding heat affected zone standard that press-fit steel ring disjunctor blank is made be less than
25.4mm, weld seam inside height are 0/-0.3mm, and outside height is to 0/+1.3mm, and id tolerance is ± 0.2mm, and ovality is
1.6mm。
The press-fit steel ring single piece rough Cutting Length obtained after press-fit steel ring disjunctor blank cutting, which is made, is
Wp260mm, press-fit steel ring finished product normal width Wb are 254mm, and allowance Lj is 3mm.
The processing monomer blank for obtaining stable is ground to Rack, obtains specification：10 × 22 inches of press-fit steel rings.
Product inspection result made from the present embodiment is as follows, meets product standard：
Claims (8)
1. the production technology of press-fit steel ring, it is characterised in that：Include the following steps,
Step 1, blanking：
Raw material coil of strip is used into the blanking coil of strip that the sub-cut of longitudinal shearing slitting equipment is required at press-fit steel ring standard specification, the width of blanking
Spend W computational methods：
W=[(D+T)×3.14]+G
Wherein：D is the press-fitting face internal diameter of press-fit steel ring standardized product, and T is material gauges, and G subtracts for the material of blanking is
Number；
Step 2, it is molded and welds：
By the blanking coil of strip of width W in step 1 by the way that tubular blank is made by moulding process after uncoiling, flattening, by tubulose base
Part is delivered in electric resistance welding equipment, is continuously welded, and synchronization process scrapes downhand weld, and press-fit steel ring disjunctor blank is made；
Step 3, it cuts：
Press-fit steel ring disjunctor blank finished product made from step 2 is cut into the press-fit monomer base of single-piece using cutting equipment
Part；
Step 4, finishing：
Finishing is carried out to press-fitting circle monomer blank obtained in step 3 and eliminates stress, obtains stable processing monomer blank；
Step 5, finished product：
Stable processing monomer blank Vehicle Processing will be obtained in step 4 to Rack, obtains press-fit steel ring finished product.
2. the production technology of press-fit steel ring according to claim 1, it is characterised in that：It is to pass through that the material, which subtracts coefficient G,
Welding equipment experiment under weld parameters fixed obtains, and is used by substituting into calculate again after verification, and the material subtracts the meter of coefficient G
Calculation method is,
G=(G1+G2)/2,
Wherein：G is that the material of blanking subtracts coefficient, and G1 is the minimum coefficient value that welding equipment obtains under weld parameters fixed, and G2 is
The maximum coefficient value that welding equipment obtains under weld parameters fixed；
Wherein, the computational methods of G1 are,
G1=(L1+L2)-L3,
Wherein, L1 is the cutting length of test specimen one before experiment welding, and L2 is the cutting length of test specimen two before experiment welding, and L3 is weldering
The sum of the length of test specimen one and test specimen two after connecing；
Wherein, the computational methods of G2 are,
G2=(L1’+L2’)-L3’
Wherein, L1 ' is the cutting length of test specimen three before experiment welding, and L2 ' is the cutting length of test specimen four before experiment welding, L3 '
For the sum of the length of test specimen three and test specimen four after welding.
3. the production technology of press-fit steel ring according to claim 2, it is characterised in that：Described L3, L3 ' value be equal to weldering
The length of maximum upset stroke when connecing equipment welding.
4. the production technology of press-fit steel ring according to claim 1 or 2, it is characterised in that：The material subtracts the number of coefficient G
Value verification method is,
Step a. is expanded using forging equipment assembly stretches test mould, and experiment press-fit steel ring finished product is extended to from normal diameter expansion
Minimum value DY or maximum value DY '；
Step b. expansions check that weld appearance without cracking, uses zero defect inside ultrasound detection weld seam after stretching；
Step c. reaches that above two standards are all qualified, assert that material subtracts the numerical value of coefficient G and takes and test qualification.
5. the production technology of press-fit steel ring according to claim 4, it is characterised in that：The minimum value DY=[DB ×
(100%+2%)], the maximum value DY '=[DB × (100%+3%)], wherein DB are the standard straight of experiment press-fit steel ring finished product
Diameter.
6. the production technology of press-fit steel ring according to claim 1, it is characterised in that：In the step 3, cut into
The width of the press-fit monomer blank of single-piece is Wp, and the normal width of press-fit steel ring finished product is Wb, cuts into the press-fitting of single-piece
Formula monomer blank width Wp=Wb+2Lj, wherein：Lj is unilateral allowance, and Lj values are 3mm.
7. the production technology of press-fit steel ring according to claim 1, it is characterised in that：In the step 2, press-fit steel
The welding heat affected zone for enclosing disjunctor blank is 25.4mm, and weld seam inside height is 0/-0.3mm, outside height be to 0/+1.2mm,
Id tolerance is ± 0.2mm, ovality 0.8-1.8mm.
8. the production technology of press-fit steel ring according to claim 1, it is characterised in that：In the step 2, moulding process
Include the following steps,
Step a, steel plate are preformed into lower camber side；
Step b increases molding cambered surface, eliminates rebound stress；
Step c is molded prewelding blank, eliminates stress before welding；
Step d, precisive shaped, the face of weld adjust welding surface angle to flat alignment.
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