CN102706767B - Push-pull type multi-groove dual side box thermal stress prefabricated microcrack cooling equipment - Google Patents
Push-pull type multi-groove dual side box thermal stress prefabricated microcrack cooling equipment Download PDFInfo
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- CN102706767B CN102706767B CN201210184218.8A CN201210184218A CN102706767B CN 102706767 B CN102706767 B CN 102706767B CN 201210184218 A CN201210184218 A CN 201210184218A CN 102706767 B CN102706767 B CN 102706767B
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- side case
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Abstract
The invention discloses push-pull type multi-groove dual side box thermal stress prefabricated microcrack cooling equipment, which belongs to the technical field of machinofacture and overcomes the defects of the conventional experiment equipment, including low protection degree of the V-shaped grooves for a bar, non-uniform cooling to the surface of the bar and difficulty in conveying the bar to the cooling equipment. By adopting a multi-groove movable side box, aiming to experiment bars with different diameters, two matchable semi-insertion pieces with different sizes can be utilized to effectively protect the V-shaped grooves, and meanwhile, the bar can be quickly conveyed to the cooling equipment and accurately leveled with the V-shaped grooves, so as to fully chill the bar. Owing to a plurality of water inlets respectively formed in four uniform positions in the circumferential and axial directions of the bar, the ring-shaped surface of the bar, which is not protected by an asbestos cushion, can be uniformly cooled in a short time. The cooling equipment has the advantages of simplicity in operation, high efficiency and reliability, and the like.
Description
One, technical field
The experimental provision that the present invention relates to the most advanced and sophisticated micro-crack of a kind of prefabricated bar V-type groove, belongs to mechanical manufacturing field.
Two, background technology
Low stress precise blanking method all first adopts the prefabricated bar V-type of method for turning groove at present, due to turning wearing and tearing and life problems thereof, cause the root fillet radius of V-type groove can not be too little, can not be too large thereby V-type groove point stresses is concentrated, cause blanking pressure still very large, and form the initial micro-crack time used after loading compared with the ring-type V-type groove of Rouno Cormer Pregrinding Wheel radius and occupied the more than 80% of blanking T.T. having, and then blanking efficiency is low.Thereby proposed before blanking, first to the experiment bar with annular V-shaped groove at the most advanced and sophisticated prefabricated micro-crack of its V-type groove, to shorten the germinating time of crackle as far as possible, improve blanking efficiency.
Thermal stress precrack method is to utilize the principle of expanding with heat and contracting with cold of material, manufacture thermograde and in bar, produce thermal stress by the diverse location place at bar, due near three-dimensional stress effect V-type trench bottom, in the time of plastic yield, near V-type trench bottom, very large hot-drawn stress will be produced, when this hot-drawn stress exceedes after the strength degree of material at corresponding temperature, will near V-type trench bottom, produce micro-crack by the intersection of elasto-plastic range (elasto-plastic region).In thermal stress precrack method, by first bar entirety being heated to high temperature, then protect the V-type slot part of bar with asbestos pad, and it is cooling fast that the bar part between V-type groove is sprayed water, i.e. segmentation is simultaneously cooling.In cooling procedure, because bar is inner and surface, V-type groove and the direct acting bar of current surface all exist temperature difference, this will cause strong thermal stress effect, and due to the effect of the three-dimensional stress at V-type groove tip, near the hot-drawn stress bottom of V-type groove will be larger.When this hot-drawn stress exceedes after the strength degree of material at corresponding temperature, will near V-type trench bottom, produce micro-crack by the intersection of elasto-plastic range (elasto-plastic region).
Through thermal stress precrack experiment repeatedly, find that existing experimental provision exists that the protected degree in bar V-type groove place is poor, bar surface cool inequality, bar send into the shortcomings such as cooling device difficulty.Cause the main cause that occurs above-mentioned deficiency to be; in existing cooling device; each independently inserted sheet is one; owing to should ensureing that bar V-type slot part is by the closely knit protection of asbestos pad; guarantee again to make hot bar to send into and put in place along each inserting-plate hole fast; it is just very difficult when bar is sent into cooling device like this; and only have a water inlet chilled water to be injected in to the upper surface of bar; therefore the most advanced and sophisticated crackle effect of the prefabricated V-type groove of thermal stress is not fine; particularly, to some plastic metal material, effect is more not obvious.
In sum, the present invention proposes a kind of new prefabricated micro-crack cooling device of plug-type multiple-grooved bilateral case thermal stress, and completed designing and developing of its machine structural parts.
Three, summary of the invention
In order to realize the quick effective cooling of bar, the present invention has designed a kind of thermal stress precrack cooling device.This device is simple to operate, efficiency is high, reliability.Its critical piece comprises upper end cover, fixation side case, active side case, inserted sheet, asbestos pad, water inlet pipe support, dividing plate and tank etc. with drawing handle.
The technical solution adopted for the present invention to solve the technical problems is: adopt the movable side case of multi-groove type with drawing handle; for the experiment bar of different-diameter; utilize the two halves of different geometrical size can join inserted sheet and effectively protect bar V-type slot part; bar can be sent into rapidly cooling device and can aim at exactly V-type groove simultaneously, and then realizes the abundant Quench of bar.Adopt 4 uniform positions on bar circumference and axially that many row's water inlets are set respectively, make the long bar annular surface do not protected by asbestos pad cooling even in the short period of time.Cooling fast for the bar with different V-type separation is carried out to segmentation pressure, adopt the form of inserted sheet to carry out spacing, on the inwall of the left and right of cooling body, process many group slots separated by a distance.Inserted sheet is connected to form by circular clamping plate, rectangle plate, asbestos pad etc.When cooling, adjust the position of inserted sheet according to the position of V-type groove on bar, to reach the best cooling effect of the long bar annular surface of not protected by asbestos pad.Inserted sheet is divided into two parts, and wherein one is semifixed, and half is moved with active side case.Bar is sent into after cooling device, after confirming that each V-type groove is aimed at corresponding asbestos pad, active side case is closed, and the cold water that enters certain pressure and flow from water inlet is sprayed water cooling to bar surface.If bar diameter changes, can replace the inserted sheet of different geometrical size.Water inlet place is provided with the water inlet pipe bracing or strutting arrangement being connected with water inlet pipe, and the water of four water delivering orifice outflows finally enters tank.
The invention has the beneficial effects as follows, bar can be sent into cooling device rapidly and accurately, and V-type groove can be effectively protected, and four different directions, to bar surface sprinkling, are realized abundant water-cooled, and bar V-type separation is adjustable, simple to operate.
Four, brief description of the drawings
Fig. 1 is inner structure schematic diagram of the present invention.
Fig. 2 is one-piece construction schematic diagram.
Fig. 3 is inserted sheet schematic diagram.
Below in conjunction with accompanying drawing and example, the present invention is further described.
Five, embodiment
In Fig. 1, the bar (1) of certain physical dimension is put into after this cooling device, now align with corresponding inserted sheet (11) just in bar V-type groove position, the active side of closing afterwards case (2), chilled water enters cooling device and bar surface is sprayed fast from four different directions.On upper end cover (10) bottom, active side case (2) inner side, fixation side case (8) inner side, tank (3), be all provided with the corresponding dividing plate of similar dividing plate (6) structure.Auger shell pit (5) on dividing plate.On the dividing plate of active side case and fixation side case, all there is slot (9).On active side case, be also provided with drawing handle.Tank lower end sets out the mouth of a river (4).
In Fig. 2, on upper end cover, fixation side case, active side case and head side plate (7), be respectively equipped with four water inlet pipes (13), the water inlet pipe interface wherein joining with active side case is wedge-shaped opening (14), after active side case closes, just dock with its interface, the end of interface adds rubber ring and guarantees sealing.Four water inlets are supported to (12) by a water inlet pipe and be integrated into a total water inlet.
In Fig. 3; force fast cooling and effectively protect V-type slot part for the bar with different V-type separation being carried out to segmentation; and can make bar send into easily; adopt the form of inserted sheet to regulate V-type separation, on the inboard partition of active side case and fixation side case, process many group slots (9).Inserted sheet is connected to form by bolt (15), nut (19) by circular clamping plate (16), rectangle plate (17), asbestos pad (18), when cooling according to the position of the corresponding adjusting inserted sheet in position of V-type groove on bar, to reach best cooling effect.In two, wherein one is semifixed for inserted sheet, and half, with the motion of active side case, can be sent bar into cooling device so fast.
Claims (3)
1. the cooling device of the most advanced and sophisticated micro-crack of the prefabricated bar V-type of thermal stress groove based on stress concentration effect and the effect of expanding with heat and contract with cold, adopt plug-type many slots bilateral case, the annular quick cooling bar of spraying water on four sides, it is characterized in that: this cooling device has upper end cover, described bilateral case, head side plate, a side case in wherein said bilateral case is fixation side case, and opposite side case is the sliding movable side case with drawing handle; For the bar of different-diameter, utilize the two halves of different geometrical size can join inserted sheet and effectively protect bar V-type slot part; Force fast cooling and effectively protect V-type slot part for the bar with different V-type separation being carried out to segmentation, and can make bar send into easily, adopt the form of inserted sheet to regulate V-type separation, on the inboard partition of active side case and fixation side case, process many group slots; When cooling according to the position of the corresponding adjusting inserted sheet in position of V-type groove on bar; Described two halves can be joined semifixed in inserted sheet, and second half moves with active side case; Described inserted sheet is connected to form by bolt, nut by circular clamping plate, rectangle plate, asbestos pad; On upper end cover, fixation side case, active side case and head side plate, be respectively equipped with a water inlet pipe; The bar of certain physical dimension is put into after this cooling device; now align with corresponding inserted sheet just in bar V-type groove position; the active side of closing afterwards case; chilled water enters cooling device and bar surface is sprayed fast from four different directions; make the bar annular surface do not protected by asbestos pad in the short period of time cooling evenly, described bar is long bar.
2. cooling device according to claim 1, is characterized in that: the water inlet pipe interface joining with active side case is wedge-shaped opening, after active side case closes, just docks with its interface, and the end of interface adds rubber ring and guarantees sealing; Four water inlets are supported and are integrated into a total water inlet by a water inlet pipe.
3. cooling device according to claim 1, it is characterized in that: in order to make cooling device water jet from multiple directions simultaneously to bar surface water spray fast, a water inlet pipe is set to be supported, four water inlets are supported and are integrated into a total water inlet by a water inlet pipe, thereby make whole cooling device only have one with the outside water inlet connecting, more convenient to operate, also make the cooling more even of bar peripheral surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210184218.8A CN102706767B (en) | 2012-05-29 | 2012-05-29 | Push-pull type multi-groove dual side box thermal stress prefabricated microcrack cooling equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210184218.8A CN102706767B (en) | 2012-05-29 | 2012-05-29 | Push-pull type multi-groove dual side box thermal stress prefabricated microcrack cooling equipment |
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| Publication Number | Publication Date |
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| CN102706767A CN102706767A (en) | 2012-10-03 |
| CN102706767B true CN102706767B (en) | 2014-09-10 |
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| CN201210184218.8A Expired - Fee Related CN102706767B (en) | 2012-05-29 | 2012-05-29 | Push-pull type multi-groove dual side box thermal stress prefabricated microcrack cooling equipment |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103343184B (en) * | 2013-05-23 | 2015-02-25 | 西安交通大学 | Notched-bar microstructure-crack initiation method used for chipless fine blanking |
| CN104357630B (en) * | 2014-10-31 | 2016-06-29 | 西安交通大学 | Ideal crack device and method is prepared in the bar Electromagnetic Heating with cannelure and cooling |
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| CN2072448U (en) * | 1990-06-14 | 1991-03-06 | 鞍山钢铁公司 | Uniform cooling device for section steel roller |
| US7985370B2 (en) * | 2008-10-31 | 2011-07-26 | Industry-University Cooperation Foundation Hankuk Aviation University | Apparatus for forming longitudinal thermal-fatigue cracks |
| CN102310175A (en) * | 2010-06-30 | 2012-01-11 | 宝山钢铁股份有限公司 | Drive roller of continuous casting machine provided with annular cooling slot |
| CN202869881U (en) * | 2012-05-29 | 2013-04-10 | 中国石油大学(华东) | Device for cooling thermal stress prefabricated microcrack by push-pull multi-slot bilateral box |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4588580B2 (en) * | 2005-08-26 | 2010-12-01 | 有限会社エコ＆エンジニアリング | Hybrid condensing heater and method for connecting solar cell elements using the same |
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2012
- 2012-05-29 CN CN201210184218.8A patent/CN102706767B/en not_active Expired - Fee Related
Patent Citations (4)
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|---|---|---|---|---|
| CN2072448U (en) * | 1990-06-14 | 1991-03-06 | 鞍山钢铁公司 | Uniform cooling device for section steel roller |
| US7985370B2 (en) * | 2008-10-31 | 2011-07-26 | Industry-University Cooperation Foundation Hankuk Aviation University | Apparatus for forming longitudinal thermal-fatigue cracks |
| CN102310175A (en) * | 2010-06-30 | 2012-01-11 | 宝山钢铁股份有限公司 | Drive roller of continuous casting machine provided with annular cooling slot |
| CN202869881U (en) * | 2012-05-29 | 2013-04-10 | 中国石油大学(华东) | Device for cooling thermal stress prefabricated microcrack by push-pull multi-slot bilateral box |
Non-Patent Citations (7)
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| JP特开2007-59825A 2007.03.08 |
| Numerical study on heat stress prefabricating ideal crack at the bottom of V shaped notch in precision cropping;S.D.ZHAO et al.;《Journal of Materials Processing Technology》;20071231;第363-367页 * |
| S.D.ZHAO et al..Numerical study on heat stress prefabricating ideal crack at the bottom of V shaped notch in precision cropping.《Journal of Materials Processing Technology》.2007,第363-367页. |
| 张立军等.热应力预制裂纹技术在低应力精密下料中的实验研究.《现代制造技术与装备》.2010,(第5期),第4、5、8页. |
| 棒料热应力预制V型槽尖端理想裂纹的可行性研究;赵升吨等;《塑性工程学报》;20061031;第13卷(第5期);第51-57页 * |
| 热应力预制裂纹技术在低应力精密下料中的实验研究;张立军等;《现代制造技术与装备》;20101231(第5期);第4、5、8页 * |
| 赵升吨等.棒料热应力预制V型槽尖端理想裂纹的可行性研究.《塑性工程学报》.2006,第13卷(第5期),第51-57页. |
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