CN202730188U - Large-size mill half gear cooling and quenching heat treatment device - Google Patents
Large-size mill half gear cooling and quenching heat treatment device Download PDFInfo
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- CN202730188U CN202730188U CN 201220217576 CN201220217576U CN202730188U CN 202730188 U CN202730188 U CN 202730188U CN 201220217576 CN201220217576 CN 201220217576 CN 201220217576 U CN201220217576 U CN 201220217576U CN 202730188 U CN202730188 U CN 202730188U
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- half tooth
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Abstract
The utility model discloses a large-size mill half gear cooling and quenching heat treatment device, which comprises an atomizing device. The atomizing device comprises a spray device and an air cooling device. The air cooling device is arranged around the spray device. The spray device comprises a spray pipeline and at least one air and water mixing pipeline, wherein one end of the air and water mixing pipeline is connected with the spray pipeline and the other end of the air and water mixing pipeline is connected with an air source device and a water supply device. Spray holes which point to a half gear workpiece to be treated are arranged on the spray pipeline. The spray pipeline and the half gear workpiece to be treated are arranged in a matched way. The large-size mill half gear cooling and quenching heat treatment device has the beneficial effects that since a combined cooling method of firstly quenching by using water, then atomizing and finally cooling by using strong wind is adopted, the cooling speed is between the cooling speed by using water and the cooling speed by using oil, and the problems of deformation and cracking during quenching by using water and low quenching degree, high cost and high inflammability during quenching by using oil are solved.
Description
Technical field
The utility model relates to a kind of thermal treatment process device, relates in particular to a kind of large-sized grinder but quenching heat treatment device of partly laughing somebody to scorn.
Background technology
At present, diameter of phi 5000～Φ 8000mm, grinding machine half tooth (ZG42CrMo) that weight is 10～20 tons, when if water quenches as quenchant fully separately, lacing wire and the subplate of half tooth very easily rupture, be out of shape very greatly, because the quench cooling rate of water is too fast, the thermal stresses and the structural stress that quench to form are very large; And with oil during as quenchant, because the speed of cooling of oil is slower, hardening capacity is relatively poor, and large like this gear needs quenching oil more than 200 tons, and cost is high, and investment is large, easily catches fire, and tooth face hardness is difficult for reaching technical requirements.
The utility model content
The purpose of this utility model is exactly in order to address the above problem, and a kind of large-sized grinder but quenching heat treatment device of partly laughing somebody to scorn is provided, and it has ensures the quality of products, and reduces cost, advantage simple to operate.
To achieve these goals, the utility model adopts following technical scheme:
A kind of large-sized grinder but quenching heat treatment device of partly laughing somebody to scorn, it comprises atomisation unit, described atomisation unit comprises spraying plant and air cooling equipment; Described air cooling equipment is located at around the spraying plant, and spraying plant comprises atomizer passgae and at least one group of mixing wastewater with air pipeline that is attached thereto, and the mixing wastewater with air pipeline the other end is connected with feeding apparatus with compressed air source unit; Described atomizer passgae is provided with the spray orifice that points to pending half tooth workpiece, the atomizer passgae arrangement that matches with pending half tooth workpiece.
Described air cooling equipment comprises 5 groups of large axial flow fans, described 5 groups of large axial flow fans by left, left, in, right, right bit, pending half tooth workpiece surface, the 2.5～3m of distance centers on pending half tooth workpiece setting.
Described atomizer passgae is the spraying endless tube of semicircular arc, cooperates with pending half tooth workpiece arc, and described spray orifice is 100mm for a plurality of spacings that are uniform-distribution with on the spraying endless tube, and direction is pointed to the spray orifice of the Φ 2.5～3mm in the center of circle.
Described mixing wastewater with air pipeline is included in 4 groups of mixing wastewater with air pipelines that atomizer passgae left side, lower left quarter, right lower quadrant, right side arrange respectively, every group of mixing wastewater with air pipeline comprises suction culvert and admission passage, described suction culvert and admission passage are respectively equipped with water intaking valve and intake valve, and every group of suction culvert and admission passage are communicated with atomizer passgae after interconnecting by Y-junction.
Described compressed air source unit is air compressor; Air compressor is connected with admission passage by the nylon high pressure pipe; Described feeding apparatus are residual sea water pump; Residual sea water pump is connected with suction culvert by high pressure leather hose.
Described spraying plant also is provided with the stiffening web that is connected with the endless tube of spraying.
The large-sized grinder but method of quenching heat treatment device of partly laughing somebody to scorn, the step that it comprises is
1) the pending half tooth workpiece that is heated to quenching temperature is come out of the stove in first shrend, cools off rapidly with water-cooling pattern, swashs the oxide skin of falling gear surface;
2) atomizing with pending half tooth workpiece after the shrend, starts spraying plant fast after, to the cooling that atomizes of pending half tooth workpiece;
3) strong wind cooling after atomizing cooling stops, being opened air cooling equipment fast, pending half tooth workpiece is carried out air-cooled, after the air-cooled end, carries out temper according to half tooth hardness requirement.
Described first shrend, to be heated to 850 ± 10 ℃ of quenching temperatures, the pending half tooth workpiece of insulation 6.5h is come out of the stove, air precooling is put the edge blackout, then passed through water-cooled 1.5～2 minutes, the gear surface temperature is cooled to rapidly swash the oxide skin of falling gear surface between 350～400 ℃, for the atomizing and strong wind cooling prepare.
Described rear atomizing, after the pending half tooth workpiece shrend, because heart section heat outwards conducts, surface temperature can raise rapidly, and the match profiles of atomizer passgae in the spraying plant and pending half tooth workpiece is closed arrangement, and cooperating distance is 500mm ± 10mm; Start fast spraying plant to the cooling that atomizes of pending half tooth workpiece, make pending half tooth workpiece surface temperature can not surpass 350～400 ℃, when the surface temperature atomizing is cooled to 300 ℃ ± 10 ℃, stops atomizing and cool off.
Described strong wind cooling, after the atomizing cooling stops, opening fast air cooling equipment, pending half tooth workpiece surface, the 2.5～3m of distance, by left, left, in, right, right, pending half tooth workpiece is carried out air-cooled, when pending half tooth workpiece surface temperature be cooled to 100～150 ℃ stop air-cooled, according to half tooth hardness requirement (HB240～280), determine 580 ± 10 ℃ of tempering, behind the insulation 10h, furnace cooling to 350 air cooling of ℃ coming out of the stove is between tested for hardness HB270～280; Indeformable in order to guarantee that later half tooth is removed in lacing wire 21, need at 570 ± 10 ℃, insulation 10h carries out the temper second time.
Principle of work of the present utility model:
By the shrend in early stage, be the ready work of subsequent step, to pending half tooth workpiece atomizing cooling, adopt at last strong wind cooling in conjunction with atomisation unit, realize pending half tooth work-piece cools quenching heat treatment; The structural shape of atomisation unit is to make according to pending half tooth workpiece, form the spraying endless tube that matches with pending half tooth workpiece, the pending half tooth workpiece surface profile of this device distance keeps certain spacing, the utility model spacing is about 500mm, provide gas by what spraying endless tube two ends and centre were respectively equipped with by air compressor and residual sea water pump, the mixing wastewater with air pipeline of water, the valve that suction culvert and admission passage are provided with separately in the adjusting mixing wastewater with air pipeline, form water smoke by the spraying endless tube by even distribution or the spray orifice ejection of suitably adjusting as required spacing, pending half tooth workpiece is implemented spraying, realize the atomizing cooling.
By integrated use shrend, atomizing, strong wind cooling technique means, control pending half tooth work-piece cools speed, the Cooling Quenching thermal treatment quality of pending half tooth workpiece is protected.
The beneficial effects of the utility model:
1 technique has the following advantages: for the ZG42CrMo material, if water is as quenchant separately, because the speed of cooling of water is too fast, also very fast in the cold zone cooling rate especially, half tooth that is very easy to make the ZG42CrMo material is out of shape too greatly because of thermal stresses and structural stress and ftractures; If use separately oil as quenchant, because the speed of cooling of oil is too slow, and half tooth too heavy, hardening capacity is also relatively poor, and " first shrend → rear atomizing → again forced air cooling " quenches, this scheme is very fast in high-temperature zone water speed of cooling, and atomize in low temperature usefulness+air-cooled, cooling rate is slowed down, meet the requirement of ideal quenching medium, its speed of cooling and can reach by the regulated valve size the desirable speed of cooling of half tooth between water and oil.This process program is simple to operate, and safety is energy-conservation, through hardening layer depth and solved lacing wire and subplate shrend strain cracking, the difficult problem that oil quenching is not hard.
Processing method adopts the Compound cooling of " first shrend-rear atomizing-again high wind ", and speed of cooling is between water and oil, and the hardening capacity the when strain cracking when having solved shrend and oil quenching is poor, and cost is high, a fire-hazardous difficult problem.
Description of drawings
Fig. 1 is spraying endless tube atomizing cooling direction synoptic diagram;
Fig. 2 is half tooth and atomisation unit structure and matching relationship position view.
Wherein, 1. intake valve I, 2. intake valve II, 3. intake valve III, 4. be intake valve VI, 5. water intaking valve I, 6. water intaking valve II, 7. water intaking valve III, 8. water intaking valve VI, 9. spraying endless tube, 10. stiffening web, 11. half teeth, 12. aerofoil fan I, 13. aerofoil fan II, 14. aerofoil fan III, 15. aerofoil fan VI, 16. aerofoil fan V, 17. wear and shoulder an I, and 18. wear and shoulder an II, 19 shoulder an III, 20. spray orifices, 21. lacing wires for wearing.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing and embodiment.
Fig. 1, material are large-scale (Φ 5000～Φ 8000) grinding machine half tooth of ZG42CrMo replaces oil (or water or hardening liquid) Cooling Quenching with " water-atomizing-high wind " Cooling Quenching thermal treatment process.16 tons of technical requirements T:HB240～280, half teeth, 11 substances.During the atomizing cooling, spraying endless tube 9 is provided with the spray orifice 20 that points to half tooth 11, the water smoke of spray orifice 20 ejections, be injected in respectively the wheel tooth surface, spray orifice is 100mm for a plurality of spacings that are uniform-distribution with on the spraying endless tube 9, and direction is pointed to the spray orifice 20 of the Φ 2.5～3mm in the center of circle, spraying endless tube 9 cooperates with half tooth, 11 arcs, and cooperating distance is 500mm;
Among Fig. 2, a kind of large-sized grinder but quenching heat treatment device of partly laughing somebody to scorn, it comprises atomisation unit, described atomisation unit comprises spraying plant and air cooling equipment; Described air cooling equipment is located at around the spraying plant, and spraying plant comprises atomizer passgae and three groups of mixing wastewater with air pipelines that are attached thereto, and the mixing wastewater with air pipeline the other end is connected with feeding apparatus with compressed air source unit; Atomizer passgae is provided with the spray orifice 20 that points to half tooth 11, and atomizer passgae cooperates arrangement with half tooth 11.Described water pipe is the spraying endless tube 9 of semicircular arc, cooperates with half sector shape, and described spray orifice 20 is 100mm for a plurality of spacings that are uniform-distribution with on the spraying endless tube 9, and direction is pointed to the spray orifice 20 of the Φ 2.5～3mm in the center of circle.
Air cooling equipment comprises 5 groups of large axial flow fans, be respectively aerofoil fan I 12, aerofoil fan II 13, aerofoil fan III 14, aerofoil fan VI 15, aerofoil fan V 16, described 5 groups of large axial flow fans by left, left, in, right, right bit, distance half tooth 11 surfaces, 2.5～3m arranges around half tooth 11.
The mixing wastewater with air pipeline is included in 4 groups of mixing wastewater with air pipelines that atomizer passgae left side, lower left quarter, right lower quadrant, right side arrange respectively, described every group of suction culvert and admission passage are respectively equipped with valve, described admission passage is provided with valve and comprises intake valve I 1, intake valve II 2, intake valve III 3, be intake valve VI 4, the suction culvert valve is water intaking valve I 5, water intaking valve II 6, water intaking valve III 7, water intaking valve VI 8, every group of suction culvert and admission passage are communicated with water pipe after interconnecting by Y-junction.
Compressed air source unit is w-3.0/10 type air compressor; Air compressor is connected with admission passage by the nylon high pressure pipe;
Feeding apparatus are the residual sea water pump of WQ15 * 30 * 3; Residual sea water pump connects by the high pressure leather hose suction culvert.
Spraying plant also is provided with the stiffening web 10 that is connected with the endless tube 9 of spraying.
A kind of large-sized grinder but method of quenching heat treatment device of partly laughing somebody to scorn, the step that it comprises is
1) the pending half tooth workpiece that is heated to quenching temperature is come out of the stove in first shrend, cools off rapidly with water-cooling pattern, swashs the oxide skin of falling gear surface;
2) atomizing with pending half tooth workpiece after the shrend, starts spraying plant fast after, to the cooling that atomizes of pending half tooth workpiece;
3) strong wind cooling after atomizing cooling stops, being opened air cooling equipment fast, pending half tooth workpiece is carried out air-cooled, after the air-cooled end, carries out temper according to half tooth hardness requirement.
Elder generation's shrend refers to, first half tooth is heated to 650 ℃, samming 2.5h, and it is too fast to heat up with prevention, makes the distortion of half tooth, then is warmed up to 850 ± 10 ℃, comes out of the stove behind the insulation 6.5h, with three endless chains, shoulders a little among Fig. 2 with wearing the mode of shouldering, wearing.Wear and shoulder an I 17, wear and shoulder an II 18, shoulder an III 19 for wearing, half tooth is put down being hung in the air, air precooling is put the edge blackout, then keeps flat in the entry and cools off.Water-cooled 1.5～2 minutes is cooled to the gear surface temperature rapidly to swash the oxide skin of falling gear surface between 350～400 ℃, for the atomizing and strong wind cooling prepare.
Rear atomizing refers to that after the half tooth shrend, because heart section heat outwards conducts, surface temperature can raise rapidly, and the match profiles of atomizer passgae in the spraying plant and half tooth is closed arrangement, and cooperating distance is 500mm; Start fast the cooling that atomizes of double tooth of spraying plant, make half tooth surface temperature can not surpass 350～400 ℃, when the surface temperature atomizing is cooled to 290～310 ℃, stops atomizing and cool off.
Strong wind cooling refers to, after the atomizing cooling stops, opening fast air cooling equipment, distance half tooth surface 2.5～3m, by left, left, in, right, right, it is air-cooled that double tooth carries out, and stops air-cooled when half tooth surface temperature is cooled to 103 ℃.
According to half tooth hardness requirement (HB240～280), determine 580 ± 10 ℃ of tempering, behind the insulation 10h, furnace cooling to 350 air cooling of ℃ coming out of the stove is between tested for hardness HB270～280; Indeformable in order to guarantee that later half tooth is removed in lacing wire 21, need at 570 ± 10 ℃, insulation 10h carries out the temper second time.
Although above-mentionedly by reference to the accompanying drawings embodiment of the present utility model is described; but be not the restriction to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various modifications that creative work can make or distortion still in protection domain of the present utility model.
Claims (6)
1. a large-sized grinder but quenching heat treatment device of partly laughing somebody to scorn, it comprises atomisation unit, it is characterized in that, described atomisation unit comprises spraying plant and air cooling equipment; Described air cooling equipment is located at around the spraying plant, and spraying plant comprises atomizer passgae and at least one group of mixing wastewater with air pipeline that is attached thereto, and the mixing wastewater with air pipeline the other end is connected with feeding apparatus with compressed air source unit; Described atomizer passgae is provided with the spray orifice that points to pending half tooth workpiece, the atomizer passgae arrangement that matches with pending half tooth workpiece.
2. the large-sized grinder but quenching heat treatment device of partly laughing somebody to scorn as claimed in claim 1, it is characterized in that, described air cooling equipment comprises 5 groups of large axial flow fans, described 5 groups of large axial flow fans by left, left, in, right, right bit, pending half tooth workpiece surface, the 2.5～3m of distance is around pending half tooth workpiece setting.
3. the large-sized grinder but quenching heat treatment device of partly laughing somebody to scorn as claimed in claim 1, it is characterized in that, described atomizer passgae is the spraying endless tube of semicircular arc, cooperate with pending half tooth workpiece arc, described spray orifice is 100mm for a plurality of spacings that are uniform-distribution with on the spraying endless tube, and direction is pointed to the spray orifice of the Φ 2.5～3mm in the center of circle.
4. the large-sized grinder but quenching heat treatment device of partly laughing somebody to scorn as claimed in claim 1, it is characterized in that, described mixing wastewater with air pipeline is included in 4 groups of mixing wastewater with air pipelines that atomizer passgae left side, lower left quarter, right lower quadrant, right side arrange respectively, every group of mixing wastewater with air pipeline comprises suction culvert and admission passage, described suction culvert and admission passage are respectively equipped with water intaking valve and intake valve, and every group of suction culvert and admission passage are communicated with atomizer passgae after interconnecting by Y-junction.
5. the large-sized grinder but quenching heat treatment device of partly laughing somebody to scorn as claimed in claim 4 is characterized in that described compressed air source unit is air compressor; Air compressor is connected with admission passage by the nylon high pressure pipe; Described feeding apparatus are residual sea water pump; Residual sea water pump is connected with suction culvert by high pressure leather hose.
6. the large-sized grinder but quenching heat treatment device of partly laughing somebody to scorn as claimed in claim 1 is characterized in that described spraying plant also is provided with the stiffening web that is connected with the endless tube of spraying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220217576 CN202730188U (en) | 2012-05-08 | 2012-05-08 | Large-size mill half gear cooling and quenching heat treatment device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220217576 CN202730188U (en) | 2012-05-08 | 2012-05-08 | Large-size mill half gear cooling and quenching heat treatment device |
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| CN202730188U true CN202730188U (en) | 2013-02-13 |
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| CN 201220217576 Expired - Fee Related CN202730188U (en) | 2012-05-08 | 2012-05-08 | Large-size mill half gear cooling and quenching heat treatment device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102851480A (en) * | 2012-05-08 | 2013-01-02 | 济南重工股份有限公司 | Large mill half-gear cooling and quenching heat treatment device and method |
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2012
- 2012-05-08 CN CN 201220217576 patent/CN202730188U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102851480A (en) * | 2012-05-08 | 2013-01-02 | 济南重工股份有限公司 | Large mill half-gear cooling and quenching heat treatment device and method |
| CN102851480B (en) * | 2012-05-08 | 2014-06-25 | 济南重工股份有限公司 | Large mill half-gear cooling and quenching heat treatment device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130213 Termination date: 20150508 |
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| EXPY | Termination of patent right or utility model |