CN204602909U - A kind of device correcting C type steel-casting - Google Patents
A kind of device correcting C type steel-casting Download PDFInfo
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- CN204602909U CN204602909U CN201520121184.7U CN201520121184U CN204602909U CN 204602909 U CN204602909 U CN 204602909U CN 201520121184 U CN201520121184 U CN 201520121184U CN 204602909 U CN204602909 U CN 204602909U
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Abstract
The utility model relates to large shaped cast steel part and corrects shaping technique, particularly a kind of device correcting C type steel-casting.Wherein, correct the device of C type steel-casting, comprise C type steel-casting to be corrected, described C type steel-casting is horizontally set on thickness and is greater than on the steel plate of 20mm, the C shape opening direction of described C type steel-casting aligns with the length of side outer rim of steel plate, and be welded and fixed with surface of steel plate inside the C shape open at one end of C type steel-casting, the other end is free end, steel plate between described C shape opening is provided with screw jack, the top of described jack leans the inner side of C type steel-casting free end, steel plate outside the described jack other end is fixed with for the block against jack, arc top place inside described C type steel-casting is provided with the arc economizer bank for heating steel-casting.This device can simplify steel-casting and correct shaping process when correcting large-scale C type steel-casting, reduce casting cost, and improves rectification shaping efficiency and security reliability.
Description
Technical field
The utility model relates to large shaped cast steel part and corrects shaping technique, particularly a kind of device correcting C type steel-casting.
Background technology
Large thick-wall rotary type high-strength cast steel part material belongs to medium high carbon low-alloy steel, and material mainly comprises following mass component C:0.30 ~ 0.35, Si≤0.6, Mn:0.6 ~ 1.0, P≤0.025, S≤0.020, Ni≤0.4, Cr:1.4 ~ 1.7, Mo:0.15 ~ 0.35.General 5-the 6m of foundry goods diameter, point two halves moulding, single half steel-casting is c-shaped, thickest 200mm, minimum wall thickness (MINI W.) 50mm, single half weight 5t.Require that final mechanical property is: tensile strength Rm >=770MPa, yield strength Rp0.2 >=525MPa, percentage elongation >=10%, the contraction percentage of area >=35%, body hardness 223 ~ 300HB, room temperature impact toughness AKV >=27J.From mechanical property, belong to high intensity type, and comprehensive mechanical property requires high.This type of foundry goods needs to adopt the process of quenching mode, and after rising head cutting, mass-heat process, foundry goods often exists dehisces or the situation of reducing distortion.Hypertonic amount is diametric(al) 0 ~ 30mm substantially, exceeds casting allowance, causes the situation generation that local location is processed casting skin or do not processed.Therefore first reprocessing must be corrected to foundry goods.
Traditional method for this problem is to after the line of strained castings size, and carry out soldering to the exposed position of foundry goods, excavate foundry goods fleshiness position gouge, finally reprocessing puts in place.This way not only increases welding capacity, also add the production costs such as gouge, relief grinding, NDT detection, and deposits the risk of secondary deformation after welding.
The another kind of way of prior art is in modeling process, increase foundry goods reversible deformation subsidy amount, ensure that processing does not have casting skin phenomenon to occur to a certain extent, but add the consumption of molten steel, make cast shape size differ larger with drawing requirement, too increase processing capacity, casting cost is improved.
Also have in prior art and adopt method that the lacing wire of individual layer cross is set to prevent casting deformation, but actual production shows, only arranges the lacing wire of individual layer cross not remarkable to preventing casting deformation effect.
Utility model content
The deficiency that the utility model exists for steel-casting straightening technology in prior art, a kind of device correcting C type steel-casting is provided, for the rectification of large thick-wall revolving body steel-casting, shaping process is corrected to simplify steel-casting, reduce casting cost, and improve rectification shaping efficiency and security reliability.
The purpose of this utility model realizes like this, a kind of device correcting C type steel-casting, comprise C type steel-casting to be corrected, described C type steel-casting is horizontally set on thickness and is greater than on the steel plate of 20mm, the C shape opening direction of described C type steel-casting aligns with the length of side outer rim of steel plate, and be welded and fixed with surface of steel plate inside the C shape open at one end of C type steel-casting, the other end is free end, steel plate between described C shape opening is provided with screw jack, the top of described jack leans the inner side of C type steel-casting free end, steel plate outside the described jack other end is fixed with for the block against jack, arc top place inside described C type steel-casting is provided with the arc economizer bank for heating steel-casting.
The device of rectification C type steel-casting of the present utility model, workpiece is made to produce the rectification of thermal deformation realization casting deflection by the top pressure effect of economizer bank heating and jack, simplify the rectification shaping process of steel-casting, reduce casting cost, and improve rectification shaping efficiency and security reliability.
As preferred version of the present utility model, the arc length of described economizer bank is 0.3-0.4 times of arc length in C type steel-casting.
For ease of the heating of economizer bank, described economizer bank is the economizer bank of flame heating, and the tube wall of economizer bank is provided with some fire jetting holes, and described economizer bank is communicated with flammable source of the gas through adjustable valve.
Another object of the present utility model is to provide a kind of method of correcting C type steel-casting, comprises following process:
1) technological preparation: according to treating that shaping C type steel-casting size prepares a thickness and is greater than 20mm and planar dimension is greater than the smooth steel plate of described C type steel-casting plane projection size, again by C type steel-casting critical size, determine that steel-casting is dehisced or reducing, according to processing technology figure, determine the amount of dehiscing or degree of choke, and at steel lining out, identify the fixed position of steel-casting on steel plate and the position after correcting;
2) described C type steel-casting level is put on steel plate, alignd with the length of side outer rim of steel plate in the C shape openend of steel-casting, and one end inner ring of steel-casting C shape opening is weldingly fixed on steel plate, the other end of steel-casting keeps free state, along opening direction horizontal positioned 50 ~ 100t screw jack of steel-casting on steel plate, the top of jack is made to withstand on inside steel-casting free end, surface of steel plate outside the other end of jack is welded and fixed a block and props up jack, after correcting outside steel-casting free end, the marking place of position is welded and fixed a baseline rod, to determine the rectification final position of steel-casting,
3) fix the economizer bank for heating steel-casting of arc length in one 0.3-0.4 times on steel-casting inside arc top, described economizer bank is connected with flammable source of the gas through valve, and the tube wall of economizer bank is provided with fire jetting hole;
4) economizer bank is connected flammable source of the gas and light make heating flame from fire jetting hole ejection heat inside steel-casting, by valve regulated flame, make flame from small to large, half an hour, flame was transferred to maximum gradually, with asbestos cloth, economizer bank and steel-casting heating part are hidden simultaneously, avoid flame to affect corrective operations, the change outside observation steel-casting free end and between baseline rod, along with the rising of heating-up temperature, free end is close gradually to baseline rod, when steel-casting is less than 10mm along the correct amount of C shape opening, heat inside employing economizer bank and correct, when steel-casting is greater than 10mm along the correct amount of C shape opening, economizer bank is in heating process inside steel-casting, the temperature difference of steel-casting inner side and outer side reduces gradually, free end reduces gradually to the speed that baseline rod is close and stops, after the temperature of steel-casting reaches 130 ~ 170 DEG C, be incubated 30 minutes, slow reinforcing is started with jack inside steel-casting free end, keep that steel-casting free end outer ring is per minute extends out 4-6mm, until outer ring finally contacts baseline rod namely stop pressurization,
5), after checking that steel-casting inner side and outer side is without exception, reinforce spot welding is some outside in the contact surface of steel-casting and steel plate;
6) close the flame source of the gas of economizer bank, remove economizer bank, steel-casting is heated position heat-preservation cotton and cover, steel plate is carried out Stress relieving annealing together with steel-casting handling to annealing furnace, finally takes out workpiece, remove steel plate.
For ease of eliminating the internal stress of correcting rear steel-casting, annealing process in described step 6) is: workpiece enters stokehold, 100 ~ 150 DEG C are first preheated in stove, after loading workpiece, be warming up to 580 ~ 620 DEG C with the speed of 30 ~ 60 DEG C/h, insulation t hour, wherein t=foundry goods thickest+1h/inch+(2 ~ 3) h, then be cooled to steel-casting temperature with 20 ~ 50 DEG C/h speed to be less than 200 DEG C and to come out of the stove again, after coming out of the stove, naturally cool to 20 ~ 40 DEG C in atmosphere, cut open and the weld seam of equating steel-casting and steel plate.
Fixing for ease of steel-casting and steel plate, described step 2) in weld bead height inside steel-casting one end and between steel plate be 50-60mm, fusion length is 120-150mm.
The method of rectification C type steel-casting of the present utility model accurately can realize the rectification of large thick-wall rotary type casting steel casting distortion, the rectification of being especially out of shape in large thick-wall C lopps high-strength cast steel part foundry production, do not need to use large-scale rectification auxiliary equipment, operation is simple, safe and reliable.Meanwhile, the utility model method significantly reduces foundry goods because being out of shape the size soldering amount caused, and saves welding cost, shortens the castings production cycle.
Accompanying drawing explanation
Fig. 1 is preheating schematic diagram inside C type steel-casting of the present utility model.
Fig. 2 is the schematic diagram of the device of rectification C type steel-casting of the present utility model.
Wherein, 1 steel-casting; 2 economizer banks; 3 blocks; 4 jack; 5 steel plates; 6 baseline rods.
Detailed description of the invention
Embodiment 1
Be the device of rectification C type steel-casting of the present utility model as depicted in figs. 1 and 2, comprise C type steel-casting 1 to be corrected, steel-casting 1 is horizontally set on thickness and is greater than on the steel plate 5 of 20mm, the C shape opening direction of steel-casting 1 aligns with the length of side outer rim of steel plate 5, and fix with steel plate 5 surface soldered inside the C shape open at one end of steel-casting 1, the other end is free end, steel plate 5 between C shape opening is provided with screw jack 4, the top of jack 4 leans the inner side of steel-casting 1 free end, steel plate 5 outside jack 4 other end is fixed with for the block 3 against jack 4, arc top place inside steel-casting 1 is provided with the arc economizer bank 2 for heating steel-casting 1, the arc length of economizer bank 2 is 0.3-0.4 times of arc length in C type steel-casting, the arc of this economizer bank 2 is similar to the arc inside steel-casting 1, and place between two parties inside steel-casting 1, as shown in Figure 1, this economizer bank 2 adopts Φ 10 ~ 20mm common steel tube to bend and forms, economizer bank 2 is near steel-casting 1 side, the eyelet of a Φ 1 ~ 3mm is bored as fire jetting hole every 5 ~ 10cm, economizer bank 2 end blocks, other end cover has special glue leather hose, the other end of rubber flexible pipe is connected with gas pipeline interface through valve, during use, open valve, connect natural gas and directly light natural gas, on economizer bank 2, each eyelet flame heats core cavity.
The device of rectification C type steel-casting of the present utility model, workpiece is made to produce the rectification of thermal deformation realization casting deflection by the top pressure effect of economizer bank 2 heating and jack 4, simplify the rectification shaping process of steel-casting, reduce casting cost, and improve rectification shaping efficiency and security reliability.
Embodiment 2
Adopt said apparatus to carry out the method for C type steel-casting rectification, comprise following process:
1) technological preparation: according to treating that shaping C type steel-casting 1 size prepares a thickness and is greater than 20mm and planar dimension is greater than the smooth steel plate 5 of C type steel-casting 1 plane projection size, again by C type steel-casting 1 critical size, determine that steel-casting 1 is dehisced or reducing, according to processing technology figure, determine the amount of dehiscing or degree of choke, and rule on steel plate 5, identify the fixed position of steel-casting 1 on steel plate 5 and the position after correcting;
2) steel-casting 1 level is put on steel plate 5, alignd with the length of side outer rim of steel plate 5 in the C shape openend of steel-casting 1, and one end inner ring of the C shape opening of steel-casting 1 is weldingly fixed on steel plate 5, solid and reliable for being welded and fixed, weld bead height between steel-casting 1 and steel plate 5 is 50-60mm, fusion length is 120-150mm, the other end of steel-casting 1 keeps free state, along opening direction horizontal positioned 50 ~ 100t screw jack 4 of steel-casting 1 on steel plate 5, the top of jack 4 is made to withstand on inside steel-casting 1 free end, steel plate 5 surface soldered outside the other end of jack 4 is fixed a block 3 and is propped up jack 4, after correcting outside steel-casting 1 free end, the marking place of position is welded and fixed a baseline rod 6, to determine the rectification final position of steel-casting 1,
3) fix the economizer bank 2 for heating steel-casting 1 of arc length in one 0.3-0.4 times on steel-casting 1 inside arc top, economizer bank 2 is connected with flammable source of the gas through valve, and the tube wall of economizer bank 2 is provided with fire jetting hole;
4) economizer bank 2 being connected heating source of the gas lighting makes heating flame heat from fire jetting hole ejection inside steel-casting 1, by valve regulated flame, make flame from small to large, half an hour, flame was transferred to maximum gradually, with asbestos cloth, economizer bank 2 and steel-casting 1 heating part are hidden simultaneously, avoid flame to affect corrective operations, the change outside observation steel-casting 1 free end and between baseline rod 6, along with the rising of heating-up temperature, free end is close gradually to baseline rod 6, when steel-casting 1 is less than 10mm along the correct amount of C shape opening, heat inside employing economizer bank 2 and correct, when steel-casting 1 is greater than 10mm along the correct amount of C shape opening, inside economizer bank 2 pairs of steel-castings 1 in heating process, the temperature difference of steel-casting 1 inner side and outer side reduces gradually, free end reduces gradually to the speed that baseline rod 6 is close and stops, after the temperature of steel-casting 1 reaches 130 ~ 170 DEG C, be incubated 30 minutes, slow reinforcing is started with jack 4 inside steel-casting 1 free end, keep per minute outside steel-casting 1 free end and extend out 4-6mm, until outside finally contacts baseline rod 6 namely stop pressurization,
5), after checking that steel-casting 1 inner side and outer side is without exception, reinforce spot welding is some steel-casting 1 and outside in the contact surface of steel plate 5;
6) close the flame source of the gas of economizer bank 2, remove economizer bank 2, steel-casting 1 is heated position heat-preservation cotton and covers, steel plate 5 is carried out Stress relieving annealing together with steel-casting 1 handling to annealing furnace, finally takes out workpiece, remove steel plate.Wherein annealing process is: workpiece enters stokehold, 100 ~ 150 DEG C are first preheated in stove, after loading workpiece, 580 ~ 620 DEG C are warming up to the speed of 30 ~ 60 DEG C/h, insulation t hour, wherein t=foundry goods thickest+1h/inch+(2 ~ 3) h, be then cooled to steel-casting 1 temperature with 20 ~ 50 DEG C/h speed and be less than 200 DEG C and come out of the stove again, naturally cool to 20 ~ 40 DEG C in atmosphere after coming out of the stove, cut open and the weld seam of equating steel-casting 1 and steel plate 5.
The method of rectification C type steel-casting of the present utility model accurately can realize the rectification of large thick-wall rotary type casting steel casting distortion, the rectification of being especially out of shape in large thick-wall C lopps high-strength cast steel part foundry production, do not need to use large-scale rectification auxiliary equipment, operation is simple, safe and reliable.Meanwhile, the utility model method significantly reduces foundry goods because being out of shape the size soldering amount caused, and saves welding cost, shortens the castings production cycle.
Claims (3)
1. correct the device of C type steel-casting for one kind, comprise C type steel-casting to be corrected, it is characterized in that, described C type steel-casting is horizontally set on thickness and is greater than on the steel plate of 20mm, the C shape opening direction of described C type steel-casting aligns with the length of side outer rim of steel plate, and be welded and fixed with surface of steel plate inside the C shape open at one end of C type steel-casting, the other end is free end, steel plate between described C shape opening is provided with screw jack, the top of described jack leans the inner side of C type steel-casting free end, steel plate outside the described jack other end is fixed with for the block against jack, arc top place inside described C type steel-casting is provided with the arc economizer bank for heating steel-casting.
2. the device of rectification C type steel-casting according to claim 1, it is characterized in that, the arc length of described economizer bank is 0.3-0.4 times of arc length in C type steel-casting.
3. the device of rectification C type steel-casting according to claim 1, it is characterized in that, described economizer bank is the economizer bank of flame heating, and the tube wall of economizer bank is provided with some fire jetting holes, and described economizer bank is communicated with flammable source of the gas through adjustable valve.
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| CN201520121184.7U CN204602909U (en) | 2015-03-02 | 2015-03-02 | A kind of device correcting C type steel-casting |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104722609A (en) * | 2015-03-02 | 2015-06-24 | 共享铸钢有限公司 | Device and method for straightening C-type steel casting |
| CN107542275A (en) * | 2017-11-01 | 2018-01-05 | 江苏安荣电气设备股份有限公司 | A kind of curved built-in sliding chute orthopedic equipment |
| CN107900148A (en) * | 2017-10-27 | 2018-04-13 | 王志斌 | A kind of devices and methods therefor for correcting c-type steel-casting |
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2015
- 2015-03-02 CN CN201520121184.7U patent/CN204602909U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104722609A (en) * | 2015-03-02 | 2015-06-24 | 共享铸钢有限公司 | Device and method for straightening C-type steel casting |
| CN107900148A (en) * | 2017-10-27 | 2018-04-13 | 王志斌 | A kind of devices and methods therefor for correcting c-type steel-casting |
| CN107542275A (en) * | 2017-11-01 | 2018-01-05 | 江苏安荣电气设备股份有限公司 | A kind of curved built-in sliding chute orthopedic equipment |
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