CN101386034B - Production method of high precision profile steel for fork - Google Patents
Production method of high precision profile steel for fork Download PDFInfo
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- CN101386034B CN101386034B CN2008101207193A CN200810120719A CN101386034B CN 101386034 B CN101386034 B CN 101386034B CN 2008101207193 A CN2008101207193 A CN 2008101207193A CN 200810120719 A CN200810120719 A CN 200810120719A CN 101386034 B CN101386034 B CN 101386034B
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Abstract
The invention discloses a method for producing high-precision profile steel used in a fork lift truck. A cold drawing method is used for the production. The process steps are as follows: hot-rolled profile steel with the cross section tolerance of plus 1-2mm and the length of 2-8m is taken as a blank; a hard alloy is used for preparing a die head by slow feeding wire cutting method; the size of the cross section of the head of the profile steel blank with the axial length of 100-250mm is reduced so as to pass through the inner hole of the die head; the head of the profile steel blank axially passes through the inner hole of the die head which is fixed on a guide rail of a chain-wheel wire drawing machine, and the drawing head of the wire drawing machine clamps the profile steel blank which passes through the die head; a motor of the chain-wheel wire drawing machine is started, and drives the drawing head by a gear box, a chain wheel and a drag chain to move linearly along the guide rail, the profile steel blank with the tolerance of plus 1-2mm is drawn for a plurality of times into finished profile steel with the tolerance of plus or minus 0.2mm. The method can ensure the high precision of the profile steel, and greatly reduce the production cost.
Description
Technical field
The present invention relates to a kind of shape steel producing method, specifically is a kind of production (processing) method of high precision profile steel for fork.
Background technology
Fork truck is the shaped steel of I font, C font or J font with shaped steel such as cross sectional shape, because the desirability of fork truck quality, its precision there is higher requirement, the material of using as forklift door frame is the I font shaped steel of 16Mn, the most basic requirement of the tolerance of each spot size of its cross section is ± 1mm, guarantee its strict tolerance standard of fork truck quality then for ± 0.2mm, bestly be ± 0.1mm (being described high precision profile steel).
But this objective requirement becomes the very puzzled for many years technical barrier of domestic and international fork truck manufacturing enterprise:
It is that hot-extrusion and hot rolling method are hot rolling technology production that at present domestic and international fork truck all adopts hot extrusion with shaped steel, if the hot extrusion that adopts a hot extrusion production such as an Italian family to be on a grand scale is produced the shaped steel that fork truck is produced with shaped steel company, its precision can reach the requirement of the high precision profile steel of guaranteeing that the fork truck quality is required fully, the tolerance standard that is each spot size of shaped steel cross section is ± 0.1, but because hot extrude needs expensive main equipment (needing the investment of several hundred million RMB), so, the price of its shaped steel is very expensive, as this Italy company present price per ton is about 40,000 yuans, makes the difficult load-bearing of fork truck manufacturing enterprise negative;
Produce the company that fork truck is used shaped steel if adopt the hot rolling method to produce as the extensive hot rolling method of Germany one family, the price of the shaped steel that the price of the shaped steel that its hot rolling method is produced is produced far below hot extrusion, per ton as the present price of this German company is about 1.8 ten thousand yuans, but owing to reasons such as the radial pressure of hot rolling method is inhomogeneous make the tolerance of each spot size of shaped steel cross section only reach reluctantly basic demand that fork truck produces promptly ± 1mm, can not satisfy far away and guarantee the fork truck quality and be that tolerance standard is ± requirement of 0.2mm, let alone reach ± requirement of 0.1mm the high accuracy of shaped steel.
As mentioned above, up to now, for guaranteeing the fork truck product quality, at present domestic and international fork truck manufacturer has to bear fancy price and removes to buy the product of above-mentioned hot extrusions such as Italy production fork truck with shaped steel company.Simultaneously, at present both at home and abroad fork truck manufacturer all earnestly seeking a kind of tolerance that can guarantee each spot size of shaped steel cross section and reaching ± 0.2mm, best requirement for ± 0.1mm to be to guarantee the fork truck quality, makes the shaped steel price reduce production method with the high precision profile steel for fork that reduces production costs significantly again.
Summary of the invention
The technical problem to be solved in the present invention is, overcome the defective of above prior art, provide a kind of tolerance that can guarantee each spot size of shaped steel cross section reach ± requirement of 0.2mm to be to guarantee the fork truck quality, makes the shaped steel price reduce production method with the high precision profile steel for fork of the production cost that reduces fork truck manufacturing enterprise significantly again.
Technical solution of the present invention is, a kind of production method of high precision profile steel for fork is provided, and adopting cold drawn method is cold-drawing process production, and its processing step is:
1., adopt good each the spot size tolerance of cross section of hot rolling for+1～2mm, length be that the shaped steel of 2～8m is made blank; Described shaped steel blank advantageous cross sections is shaped as shaped steel (the general I of title shaped steel, C shaped steel or J shaped steel in the industry) blank of I font, C font or J font;
2., also adopt the silk thread cutting method of being careful to make die head with carbide alloy (as the W-Co kind carbide alloy), the endoporus of die head be shaped as the shape of cross section of pull-up steel, the endoporus of die head is of a size of the standard size of the cross section that the product shaped steel that pulls into requires, the size of the porch of die head endoporus is greater than the size in the exit of the axial middle part of die head endoporus and die head endoporus, and the porch of die head endoporus is a horn mouth;
3., adopting the method for shaper hot extrude of prior art or machine-tooled method is that the head cross sectional dimensions of 150～250mm diminishes to the size of the endoporus that can pass die head with shaped steel blank axial length;
4., the shaped steel blank head axially passed the die head endoporus on the guide rail that is fixed on the sprocket-type wire drawing machine, the shaped steel blank head that will pass die head with the drawing head of wire drawing machine clamps;
5., start the motor of sprocket-type wire drawing machine, drive drawing head along the guide rail moving linearly through gearbox, sprocket wheel, conduction chain, the tolerance that the tolerance of each spot size of cross section is pulled to several times each spot size of cross section for the shaped steel blank of+1～2mm is the finished product shaped steel of ± 0.2mm.
The 1. described shaped steel blank of above step the best is the shaped steel blank of I font for shape of cross section.
The tolerance of each spot size of the 1. described shaped steel blank of above step cross section is preferably+1mm, and its length is preferably 6～8m.
The best tolerance of each spot size of cross section of the 5. described finished product shaped steel of above step is ± 0.1mm.
It is 350 tons and above sprocket-type wire drawing machine that the 5. described sprocket-type wire drawing machine of above step is preferably pulling force, and the power of electric motor of sprocket-type wire drawing machine is preferably 120 kilowatts, and the speed ratio of described sprocket-type wire drawing machine gearbox is preferably 1: 40.
The tolerance that above step is 5. described to be pulled to each spot size tolerance of cross section for the shaped steel blank of+1～2mm each spot size of cross section several times is the finished product shaped steel of ± 0.2mm, refer to each spot size tolerance of cross section is preferably+the I font shaped steel blank of 1mm divides the best tolerance that is pulled to each spot size of cross section for the three times I font finished product shaped steel for ± 0.1mm.
The production method of high precision profile steel for fork of the present invention promptly adopts method that cold drawn method produces high precision profile steel for fork compared with prior art, has following remarkable advantage and beneficial effect:
The present invention overcome that high precision profile steel for fork manufacturing enterprise defends tenaciously for a long time " main equipment of producing high precision profile steel for fork and can only be several hundred million units of extensive corporate investment adopts hot extrusion or hot rolling method to produce; Adopt the sprocket-type wire drawing machine can only draw some round steel, square steel, hexagon steel iso-cross-section steel simple in structure at most, and will draw shape of cross section is fork truck shaped steel such as I font, C font or J font, even particularly will reach the tolerance of each spot size of its cross section of high accuracy is ± 0.2mm is best to be ± 0.1mm is impossible " technology prejudice, thoroughly solved the technical barrier of the high precision profile steel for fork production of puzzlement industry decades.
Adopt the cold draw production method of high accuracy fork truck of the present invention with shaped steel, utilize the equipment of this prior art of sprocket-type wire drawing machine, its small investment, production process are simple, but the cold drawn fork truck that comes out can reach high-precision requirement fully with shaped steel, the tolerance that can guarantee each spot size of shaped steel cross section reaches ± and 0.2mm, the best reach ± 0.1mm, thereby can guarantee the fork truck quality; Simultaneously, this shaped steel production cost is reduced significantly, make cold drawn shaped steel price of coming out only be equivalent to the price of the shaped steel that external hot rolling method produces (if the shaped steel that adopts domestic enterprise's hot rolling method to produce is made blank, its price is lower, mostly be most 1.6 ten thousand yuan per ton as the cold drawn high accuracy fork truck that goes out of present estimation the inventive method with the price of shaped steel), and then reduced the production cost of fork truck manufacturing enterprise significantly.
Description of drawings
Accompanying drawing is that to adopt the cold drawn shape of cross section that goes out of the inventive method be the structural representation of the shaped steel of I font.
The specific embodiment
Be described further below in conjunction with the production method of the drawings and specific embodiments, but the present invention far is not limited only to following specific embodiment high precision profile steel for fork of the present invention.
Referring to accompanying drawing, be example with the cold drawn a kind of concrete specification that goes out in the shaped steel that shape of cross section that forklift door frame uses is the I font, the standard size at its each position of finished product shaped steel cross section is: B 98mm; B 14mm; H 65mm; S 9mm, length 8m.
Adopt cold drawn method production, its processing step is:
1., to adopt the good shape of cross section of hot rolling be that the shaped steel of I font is made blank, the tolerance of each spot size of cross section is+1mm that promptly each position of cross section is of a size of B 99mm; B 15mm; H 66mm; S 10mm; Length is 8m.
2., adopt the silk thread cutting method of being careful of prior art to make the die head (not shown) with carbide alloy (is the carbide alloy of Yg15# as adopting the W-Co kind model); The die head endoporus be shaped as the shape of cross section of pull-up steel be the I glyph shape, the endoporus of die head is of a size of the cross section standard size that the finished product shaped steel of being pulled out requires, i.e. B 98mm; B 14mm; H 65mm; S 9mm.The size of the porch of die head endoporus is greater than the size in the exit of the axial middle part of die head endoporus and die head endoporus, be that the axial middle part of die head endoporus and the exit of die head endoporus are of a size of above-mentioned standard size, the size of the porch of die head endoporus is then greater than above-mentioned standard size, as B 102.5mm; B 18.5mm; H 69.5mm; S 13.5mm, and the porch of die head endoporus is a horn mouth.
3., to adopt the method for the shaper hot extrude of prior art be that the head cross sectional dimensions of 200mm diminishes to the size that can pass the die head endoporus with the shaped steel blank axial length of I font, as B 96mm; B 12mm; H 63mm; S 7mm.
4., to adopt commercially available pulling force be 350 tons sprocket-type wire drawing machine, the power of electric motor of this sprocket-type wire drawing machine is 120 kilowatts, the speed ratio of this sprocket-type wire drawing machine gearbox is 1: 40.The shaped steel blank head of I font is axially passed the die head endoporus (axial length of die head is generally 100～150mm, adopts 120mm as present embodiment) that is fixed on the sprocket-type wire drawing machine guide rail; To pass the shaped steel blank head clamping of the I font of die head with the drawing head of wire drawing machine.
5., start the motor of sprocket-type wire drawing machine, drive drawing head along the guide rail moving linearly through gearbox, sprocket wheel, conduction chain, the tolerance of each spot size of cross section is divided the I font finished product shaped steel of the tolerance+0.1mm of each spot size that is pulled to cross section for three times for the shaped steel blank of the I font of+1mm; Each spot size that is about to cross section is that B 99mm, b15mm, H 66mm, S 10mm, length are the shaped steel blank of the I font of 8m, and dividing the shape of cross section that is pulled to following size for three times is the finished product shaped steel of I font: B 98 ± 0.1mm; B 14 ± 0.1mm; H 65 ± 0.1mm; S 9 ± 0.1mm.
Described branch three times refers to continuous three repetition following steps:
4., to adopt commercially available pulling force be 350 tons sprocket-type wire drawing machine, the power of electric motor of this sprocket-type wire drawing machine is 120 kilowatts, the speed ratio of this sprocket-type wire drawing machine gearbox is 1: 40; The shaped steel blank head of I font is axially passed the die head endoporus that is fixed on the sprocket-type wire drawing machine guide rail, will pass the shaped steel blank head clamping of the I font of die head with the drawing head of wire drawing machine; 5., start the motor of sprocket-type wire drawing machine, drive drawing head along the guide rail moving linearly through gearbox, sprocket wheel, conduction chain,
Finished product shaped steel until the I font of the tolerance+0.1mm of each spot size that the tolerance of each spot size of cross section is pulled to cross section for the shaped steel blank of the I font of+1mm.
Claims (6)
1. the production method of a high precision profile steel for fork, it is characterized in that: adopt cold drawn method production, its processing step is:
1., to adopt the tolerance of good each spot size of cross section of hot rolling be that+1～2mm, length are that the shaped steel of 2～8m is made blank, described shaped steel blank refers to that shape of cross section is the shaped steel blank of I font, C font or J font;
2., also adopt the silk thread cutting method of being careful to make die head with carbide alloy, the endoporus of die head be shaped as the shape of cross section of pull-up steel, the endoporus of die head is of a size of the standard size of the cross section that the product shaped steel that pulls into requires, the size of the porch of die head endoporus is greater than the size in the exit of the axial middle part of die head endoporus and die head endoporus, and the porch of die head endoporus is a horn mouth;
3., adopting the method for shaper hot extrude or machine-tooled method is that the head cross sectional dimensions of 1.50～250mm diminishes to the size that can pass the die head endoporus with shaped steel blank axial length;
4., the shaped steel blank head axially passed the die head endoporus on the guide rail that is fixed on the sprocket-type wire drawing machine, the shaped steel blank head that will pass die head with the drawing head of wire drawing machine clamps;
5., start the motor of sprocket-type wire drawing machine, drive drawing head along the guide rail moving linearly through gearbox, sprocket wheel, conduction chain, the tolerance that the tolerance of each spot size of cross section is pulled to several times each spot size of cross section for the shaped steel blank of+1～2mm is the finished product shaped steel of ± 0.2mm.
2. the production method of high precision profile steel for fork according to claim 1, it is characterized in that: described shaped steel blank refers to that shape of cross section is the shaped steel blank of I font.
3. the production method of high precision profile steel for fork according to claim 1 is characterized in that: the cross section tolerance of described shaped steel blank is+1mm, and its length is 6～8m.
4. the production method of high precision profile steel for fork according to claim 1, it is characterized in that: described sprocket-type wire drawing machine is that pulling force is 350 tons and above sprocket-type wire drawing machine, the power of electric motor of sprocket-type wire drawing machine is 120 kilowatts, and the speed ratio of described sprocket-type wire drawing machine gearbox is 1: 40.
5. the production method of high precision profile steel for fork according to claim 1 is characterized in that: the tolerance of each spot size of cross section of described finished product shaped steel is ± 0.1mm.
6. according to the production method of claim 1 or 2 or 3 or 4 or 5 described high precision profile steel for fork, it is characterized in that: the described tolerance that each spot size tolerance of cross section is pulled to several times each spot size of cross section for the I font shaped steel blank of+1～2mm is the finished product shaped steel of ± 0.2mm, refers to that branchs three times with each spot size tolerance of cross section for the tolerance that the I font shaped steel blank of+1mm is pulled to each spot size of cross section is ± the I font finished product shaped steel of 0.1mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008101207193A CN101386034B (en) | 2008-09-01 | 2008-09-01 | Production method of high precision profile steel for fork |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008101207193A CN101386034B (en) | 2008-09-01 | 2008-09-01 | Production method of high precision profile steel for fork |
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| CN101386034A CN101386034A (en) | 2009-03-18 |
| CN101386034B true CN101386034B (en) | 2011-01-12 |
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| CN105396889A (en) * | 2015-12-06 | 2016-03-16 | 辽宁宏昌重工股份有限公司 | Online extrusion molding method of high-strength hot-rolled forklift gantry profile steel |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2584955A1 (en) * | 1985-01-08 | 1987-01-23 | Vaujours Ste Metallurg | Method for manufacturing a drawing die made from tungsten carbide, intended for drawing steel sections, of curvilinear geometry in the form of a V |
| CN2897476Y (en) * | 2006-04-13 | 2007-05-09 | 凌一波 | Special-section steel cold-extruding rotating die bit |
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2008
- 2008-09-01 CN CN2008101207193A patent/CN101386034B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2584955A1 (en) * | 1985-01-08 | 1987-01-23 | Vaujours Ste Metallurg | Method for manufacturing a drawing die made from tungsten carbide, intended for drawing steel sections, of curvilinear geometry in the form of a V |
| CN2897476Y (en) * | 2006-04-13 | 2007-05-09 | 凌一波 | Special-section steel cold-extruding rotating die bit |
Non-Patent Citations (3)
| Title |
|---|
| E.Sittaro.链式轨道拉拔技术连续拉拔工艺的发展.《冷轧及后处理技术交流会》.2004,525-534. * |
| 张惠忠.硬质合金拉丝模的电火花加工.《电加工与模具》.1985,(第2期),22-24. * |
| 江远祥等.连续拉拔技术的开发和应用.《上海金属》.1988,第10卷(第6期),10-16. * |
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