CN101804439B - Roll forming method of large and medium-size structural steel hollow disk-shaped forgings - Google Patents
Roll forming method of large and medium-size structural steel hollow disk-shaped forgings Download PDFInfo
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- CN101804439B CN101804439B CN201010127635XA CN201010127635A CN101804439B CN 101804439 B CN101804439 B CN 101804439B CN 201010127635X A CN201010127635X A CN 201010127635XA CN 201010127635 A CN201010127635 A CN 201010127635A CN 101804439 B CN101804439 B CN 101804439B
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Abstract
The invention discloses a roll forming method of large and medium-size structural steel hollow disk-shaped forgings, comprising the following steps of: firstly preparing structural steel bar stocks into hollow disk blanks through upsetting, profiling and punching, and then feeding the disk blanks into a rolling mill for rolling; broadening the disk blanks at the speed of 5-12 mm/s under the axial rolling force of 4500 KN-4900 KN within the rolling time of 60s and at the axial feeding speed of 1.5 mm/s; broadening the disk blanks at the speed of 3-10 mm/s under the axial rolling force of 3000 kN-3900 KN and the radial rolling force of 3500 KN-4000 KN within the rolling time of 60s-100s and at the axial feeding speed of 1.2 mm/s; and broadening the disk blanks at the speed of 2-6 mm/s under the axial rolling force of 200 kN-3000 KN and the radial rolling force of 2500 kN-3000 KN within the rolling time of 100-120s and at the axial feeding time of 0.8 mm/s, and then rolling the disk blanks into the hollow disk-shaped forgings under fire. The method is mainly used for rolling the disk-shaped forgings with excellent shapes, sizes, tissues and properties.
Description
Technical field
The present invention relates to a kind of roll-forming method of forging, the roll-forming method of the hollow disk forge piece of particularly big-and-middle-sized structural steel.
Background technology
On August 22nd, 2007, disclosed Chinese invention patent specification CN101020282A disclosed a kind of roll-forming method of big-and-middle-sized hollow disk forge piece; This method is metal bar material heating after jumping-up, die mould one-tenth dish blank; Punching becomes the hollow disc base again, becomes hollow disk forge piece to hollow disc base heating afterloading unit, location, axially rolled and footpath-axially rolled.This method has only solved the roll forming technical problem of big-and-middle-sized hollow disk forge piece.When adopting the hollow disk forge piece of the rolling big-and-middle-sized structural steel of this method; When the epicone roller of elongator is made the rolling dish base of axial feed motion towards the dish base; If its feed speed is excessive, will cause coiling base temperature when rolling and raise, be easy to generate defectives such as overheated, burning and tissue variation; If its feed speed is too small; It is too fast that the dish base dispel the heat when rolling, cause rolling motionless, or increase rolling time and rolling number of times; Reduce rolling efficiency, and can cause on the disk forge piece card and fill defectives such as discontented near the peripheral position of the ring wedge angle of outer ring surface.And when adopting the rolling disk forge piece of this method; Need reach requirement through changeing the rolling shape and size of disk forge piece that just can make repeatedly more; So not only increase production cost, reduced productivity ratio, and rolling technology and the quality control increase difficulty of also can giving of repeated multiple times.
Summary of the invention
The technical problem that the present invention will solve provides the roll-forming method that a kind of axial feed velocity that uses variation is realized the hollow disk forge piece of big-and-middle-sized structural steel; The variation that this method axial feed velocity when rolling is descending is also adjusted roll-force and radial feed speed thereupon, makes the hollow disk forge piece of roll forming possess excellent tissue and performance.
For solving the problems of the technologies described above, the roll-forming method of the hollow disk forge piece of the big-and-middle-sized structural steel of the present invention adopts following technical scheme to realize:
Be heated to deformation temperature to structural steel bar after jumping-up, die mould and punching obtain structural steel hollow disc base, be heated to said hollow disc base again and put into the elongator location after the deformation temperature by the specification blanking;
Start elongator; Handle its epicone roller and make axial feed motion with the speed of 1.5mm/s towards said hollow disc base direction, thus the epicone roller of said elongator and awl roller down along said hollow disc base axially with rolling its card of the roll-force of 4500KN～4900KN and outside its radial level, move the axially rolled of realization dish base; Said hollow disc base is with the speed broadening of 5mm/s～12mm/s;
When the operation of rolling proceeds to 60s; The core roller of handling said elongator is with the rolling said hollow disc base of the radial rolling power of 3500KN～4000KN; Simultaneously; The feed speed of adjusting said epicone roller makes the rolling hollow disc base of its speed axial feed with 1.2mm/s, and the axial rolling force that said hollow disc base receives upper and lower awl roller at this moment is 3000KN～3900KN, said hollow disc base under the effect of footpath axial rolling force with the speed broadening of 3mm/s～10mm/s;
When the operation of rolling proceeds to 100s; The feed speed of adjusting said epicone roller makes the rolling said hollow disc base of its speed axial feed with 0.8mm/s, and at this moment, the axial rolling force that said hollow disc base receives upper and lower awl roller is 2000KN～3000KN; The radial rolling power that receives is 2500KN～3000KN; Said hollow disc base finishes when the operation of rolling proceeds to 120s with the speed broadening of 2mm/s～6mm/s, and heating once and rolling becomes the hollow disk forge piece of structural steel.
The hollow disk forge piece of said structural steel rolls after normalizing adds the tempering processing; Said normalizing is to be heated to air cooling after 880 ℃～900 ℃ insulations to said hollow disk forge piece, and said tempering is to be heated to air cooling after 690 ℃～710 ℃ insulations to said hollow disk forge piece.
Compared with prior art, beneficial effect of the present invention is following:
The present invention makes its speed broadening with 5mm/s～12mm/s with axial feed velocity axial rolling hollow disc base under the roll-force of 4500KN～4900KN of 1.5mm/s in the rolling 60s of beginning; In rolling 60s～100s, make its speed broadening at the axially rolled hollow disc base in footpath under the axial rolling force of 3000KN～3900KN and under the radial rolling power of 3500KN～4000KN with 3mm/s～10mm/s with the axial feed velocity of 1.2mm/s; In rolling 100s～120s, make its speed broadening at the axially rolled hollow disc base in footpath under the axial rolling force of 2000KN～3000KN and under the radial rolling power of 2500KN～3000KN with 2mm/s～6mm/s with the axial feed velocity of 0.8mm/s; Heating once and rolling is configured as hollow disk forge piece.
Adopt such process route, can avoid coiling base temperature when rolling and raise, produce defectives such as overheated, burning and tissue variation; Can also avoid coiling base when rolling, dispel the heat too fast, cause rolling motionless, reduce rolling efficiency and on the disk forge piece card ring wedge angle periphery position near outer ring surface fill defectives such as discontented.And adopt this method to realize the heating once and rolling shaping, and reduced rolling time and rolling number of times, be easy to technology and quality are controlled, reduced production cost, improved productivity ratio.
Through detecting the size and dimension of the hollow disk forge piece of this structural steel, reached the design drawing requirement.
The structure steel material that with the trade mark is 30CrMnSiA is an example:
Through detecting the macrostructure of the hollow disk forge piece of this structural steel, do not find to have any defective.
Through detecting the fractograph of the hollow disk forge piece of this structural steel, do not find to have any defective.
Through detecting the room temperature tensile performance of the hollow disk forge piece of this structural steel: tensile strength is 1120MPa (greater than the 1030MPa of design instructions for use); Its percentage elongation is that 0.2% o'clock yield strength is 1030MPa (greater than the 785MPa of design instructions for use); Elongation after fracture be 14%～16% (greater than the design instructions for use 8%); The contraction percentage of area be 51%～54% (greater than the design instructions for use 36%), ballistic work is 56J～57J (greater than the 30J of design instructions for use).
The specific embodiment
The structure steel material that with the trade mark is 30CrMnSiA below is that example is explained concrete processing step of the present invention:
Step 1: be heated to 1160 ℃ deformation temperature to structural steel bar after obtain structural steel hollow disc base after jumping-up, die mould and the punching by the 30CrMnSiA of specification blanking;
Step 2: be heated to said hollow disc base and put into elongator and location after the above-mentioned deformation temperature;
Step 3: start elongator; Handle its epicone roller and make axial feed motion with the speed of 1.5mm/s towards said hollow disc base direction, thus the epicone roller of said elongator and awl roller down along said hollow disc base axially with rolling its card of the roll-force of 4500KN～4900KN and outside its radial level, move the axially rolled of realization dish base; Said hollow disc base is with the speed broadening of 5mm/s～12mm/s.
Step 4: when the operation of rolling proceeds to 60s; The core roller of handling said elongator is with the rolling said hollow disc base of the radial rolling power of 3500KN～4000KN; Simultaneously; The feed speed of adjusting said epicone roller makes the rolling hollow disc base of its speed axial feed with 1.2mm/s, and the axial rolling force that said hollow disc base receives upper and lower awl roller at this moment is 3000KN～3900KN, said hollow disc base under the effect of footpath axial rolling force with the speed broadening of 3mm/s～10mm/s.
Step 5: when the operation of rolling proceeds to 100s; The feed speed of adjusting said epicone roller makes the rolling said hollow disc base of its speed axial feed with 0.8mm/s, and at this moment, the axial rolling force that said hollow disc base receives upper and lower awl roller is 2000KN～3000KN; The radial rolling power that receives is 2500KN～3000KN; Said hollow disc base finishes when the operation of rolling proceeds to 120s with the speed broadening of 2mm/s～6mm/s, and heating once and rolling becomes the hollow disk forge piece of structural steel.
The finish-forging of the structure steel material of above-mentioned 30CrMnSiA or finishing temperature are greater than 850 ℃
Step 6: carry out the normalizing add-back after the hollow disk forge piece of said structural steel rolls and intimately handle; Said normalizing is to be heated to air cooling after 880 ℃～900 ℃ insulations to said hollow disk forge piece, and said tempering is to be heated to air cooling after 690 ℃～710 ℃ insulations to said hollow disk forge piece.
Through detecting the size and dimension of the hollow disk forge piece of this structural steel, reached the design drawing requirement.
Through detecting the macrostructure of the hollow disk forge piece of this structural steel, do not find to have any defective.
Through detecting the fractograph of the hollow disk forge piece of this structural steel, do not find to have any defective.
Through detecting; The room temperature tensile performance of the hollow disk forge piece of this structural steel is following: tensile strength is 1120MPa, and its percentage elongation is that 0.2% o'clock yield strength is 1030MPa, and elongation after fracture is 14%～16%; The contraction percentage of area is 51%～54%, and ballistic work is 56J～57J.
Claims (3)
1. the roll-forming method of the hollow disk forge piece of big-and-middle-sized structural steel; Comprise being heated to deformation temperature after jumping-up, die mould and punching obtain structural steel hollow disc base, put into the elongator localization step after being heated to deformation temperature to said hollow disc base again by the structural steel bar of specification blanking; It is characterized in that this method is further comprising the steps of:
Start elongator; Handle its epicone roller and make axial feed motion with the speed of 1.5mm/s towards said hollow disc base direction, thus the epicone roller of said elongator and awl roller down along said hollow disc base axially with rolling its card of the roll-force of 4500KN～4900KN and outside its radial level, move the axially rolled of realization dish base; Said hollow disc base is with the speed broadening of 5mm/s～12mm/s;
When the operation of rolling proceeds to 60s; The core roller of handling said elongator is with the rolling said hollow disc base of the radial rolling power of 3500KN～4000KN; Simultaneously; The feed speed of adjusting said epicone roller makes the rolling hollow disc base of its speed axial feed with 1.2mm/s, and the axial rolling force that said hollow disc base receives upper and lower awl roller at this moment is 3000KN～3900KN, said hollow disc base under the effect of footpath axial rolling force with the speed broadening of 3mm/s～10mm/s;
When the operation of rolling proceeds to 100s; The feed speed of adjusting said epicone roller makes the rolling said hollow disc base of its speed axial feed with 0.8mm/s, and at this moment, the axial rolling force that said hollow disc base receives upper and lower awl roller is 2000KN～3000KN; The radial rolling power that receives is 2500KN～3000KN; Said hollow disc base finishes when the operation of rolling proceeds to 120s with the speed broadening of 2mm/s～6mm/s, and heating once and rolling becomes the hollow disk forge piece of structural steel.
2. the roll-forming method of the hollow disk forge piece of big-and-middle-sized structural steel according to claim 1 is characterized in that: the hollow disk forge piece of said structural steel rolls after normalizing adds the tempering processing.
3. the roll-forming method of the hollow disk forge piece of big-and-middle-sized structural steel according to claim 2; It is characterized in that: said normalizing is to be heated to air cooling after 880 ℃～900 ℃ insulations to said hollow disk forge piece, and said tempering is to be heated to air cooling after 690 ℃～710 ℃ insulations to said hollow disk forge piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010127635XA CN101804439B (en) | 2010-03-19 | 2010-03-19 | Roll forming method of large and medium-size structural steel hollow disk-shaped forgings |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010127635XA CN101804439B (en) | 2010-03-19 | 2010-03-19 | Roll forming method of large and medium-size structural steel hollow disk-shaped forgings |
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| Publication Number | Publication Date |
|---|---|
| CN101804439A CN101804439A (en) | 2010-08-18 |
| CN101804439B true CN101804439B (en) | 2012-02-01 |
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| CN201010127635XA Expired - Fee Related CN101804439B (en) | 2010-03-19 | 2010-03-19 | Roll forming method of large and medium-size structural steel hollow disk-shaped forgings |
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| CN106541060B (en) * | 2015-09-22 | 2018-07-27 | 首都航天机械公司 | A kind of rolling production method of super-large diameter aluminium alloy integral loop |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS60124427A (en) * | 1983-12-08 | 1985-07-03 | Agency Of Ind Science & Technol | Controlling method of rolling mill |
| JPS62227540A (en) * | 1986-03-29 | 1987-10-06 | Sumitomo Metal Ind Ltd | Rolling method for metal cylindrical member |
| CN100486754C (en) * | 2006-12-06 | 2009-05-13 | 贵州安大航空锻造有限责任公司 | Rolling forming process for large hollow disc forging |
| CN101020284A (en) * | 2007-03-05 | 2007-08-22 | 贵州安大航空锻造有限责任公司 | Making process of large irregular ring blank of high temperature alloy |
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