CN103212619B - Variable-mold-clamping-force pipe internal high-pressure forming device and method - Google Patents
Variable-mold-clamping-force pipe internal high-pressure forming device and method Download PDFInfo
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- CN103212619B CN103212619B CN201310122898.5A CN201310122898A CN103212619B CN 103212619 B CN103212619 B CN 103212619B CN 201310122898 A CN201310122898 A CN 201310122898A CN 103212619 B CN103212619 B CN 103212619B
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 13
- 238000005520 cutting process Methods 0.000 claims description 16
- 238000007493 shaping process Methods 0.000 claims description 16
- 239000006052 feed supplement Substances 0.000 claims description 12
- 238000010030 laminating Methods 0.000 claims description 6
- 230000037303 wrinkles Effects 0.000 claims description 6
- 230000002349 favourable effect Effects 0.000 claims description 3
- 239000011435 rock Substances 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 abstract description 2
- 230000009916 joint effect Effects 0.000 abstract 1
- 230000001050 lubricating effect Effects 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000005461 lubrication Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000013022 venting Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The invention relates to a variable-mold-clamping-force pipe internal high-pressure forming method, which comprises the steps that after an upper mold and a lower mold are clamped, forming media with certain pressure is filled into a mold cavity, pushing heads on a left side and a right side simultaneously push pipe blanks into the mold cavity from the left side and the right side, the pipe blanks are pressed into the mold cavity to be formed through internal pressurization and axial force application and material compensation under the joint effect of the pressure of the forming media and the material compensation of the pushing heads, and finally the pipe blanks are in fit with the mold cavity to realize part formation. Since different mold clamping forces are adopted at different stages, the defects that the pressure required by the traditional constant-mold-clamping-force tube internal high-pressure forming method is high, the requirements on machine performance, mold performance, sealing performance and mold lubricating performance are high, the machine cost is high, the situation of mold lifting is apt to occur, the part forming pressure is high, large-deformation complex parts cannot be formed, the working efficiency is low and the like are overcome.
Description
Technical field
The invention belongs to forming high pressure in pipe technical field, particularly a kind of manufacturing process for forming high pressure in pipe.
Background technology
Forming high pressure in pipe is by after upper and lower mould matched moulds, the shaping medium of certain pressure is filled with in mold cavity, simultaneously, an arranged on left and right sides blank tube material of cutting somebody's hair is sent to mold cavity from arranged on left and right sides, under the pressure of shaping medium and the acting in conjunction of feed supplement of cutting somebody's hair, by internal pressurization and axial afterburning feed supplement, pipe is pressed into mold cavity, thus realizes the manufacturing process of a kind of advanced person of part forming.This manufacturing process has lightweight relative to traditional forming methods, save material, reduce subsequent mechanical processing and assembly welding amount, reduce part and number of molds, reduce die cost, surface quality of workpieces and mechanical performance high, fatigue strength is high, a series of advantage such as good rigidity.Such as, disclose forming method and the device of this tubing in CN2427399Y, CN101618415A.
Traditional forming high pressure in pipe method when mould matched moulds mold clamping force just for being greater than matched moulds drag required when part overcomes maximum working pressure (MWP), and this mold clamping force is a steady state value, cause machine pressurize requirement high, particularly large volume internal high pressure forming part because of the topping up time long, often cause because machine pressure maintaining performance is bad, cause during shaping and lift mould phenomenon, have a strong impact on the product quality of processing parts and the safety of machine, simultaneously, often cause when constant mold clamping force and this mold clamping force are maximum pipe and die surface frictional force large, part feed supplement, walk material difficulty, easily produce at distortion larger part and break, the pressure requirements of part forming medium is high, cause the mold clamping force of required machine relatively large, also relatively high to the requirement of lubrication, all higher to blank tube material performance requirement, because pressure is high to mold materials and performance, the machining accuracy of mould all requires high, also high to seal request, the stuctures and properties of booster is made to require height, make thin-walled, distortion is large, the shaping of complex shape part is relatively difficult, also increase the thrust cut somebody's hair in matched moulds drag and left and right, machine mold clamping force increases, also increase difficulty of processing and the manufacturing cost of machine, simultaneously, high topping up time and the venting duration of making of shaping medium pressure lengthens, reduce production efficiency.Generally speaking, a kind of practicable closing method for forming high pressure in pipe is found extremely urgent.
The object of the invention is high, high to machine performance, mold performance, sealing property, mold lubrication performance requirement in order to overcome pressure needed for conventional constant mold clamping force forming high pressure in pipe just, mould is lifted in high, the easy generation of machine cost, formation of parts pressure is high, can not be shaped the shortcomings such as large deformation complex parts, inefficiency, provides that a kind of mold clamping force is little, shaping medium pressure requirements is low, forming high pressure in pipe method to machine, mold performance is less demanding, production efficiency is high new change mold clamping force.
Summary of the invention
The present invention solves the problems referred to above in the following way:
Starting stage: patrix is in home position, top, and counterdie is in home position, bottom, and cut somebody's hair and be all in left and right home position in left and right, pipe is in counterdie die cavity;
Basic shaping stage: hydraulic press moved cross beam matched moulds pressurizes, when matched moulds reaches set initial sender pressure, thruster cylinder drives left and right advance of cutting somebody's hair; When described left and right cut somebody's hair arrive the mouth of pipe desired location time, charging device, by being built in interior passage of cutting somebody's hair to pipe die cavity topping up, discharges the air in pipe die cavity simultaneously; When reaching the predetermined topping up time, system sender, left and right cutting somebody's hair moves on, and forms airtight die cavity at the mouth of pipe; When described hermetic type cavity pressure reaches predetermined pressure, system sender, topping up stops;
Booster injects the mesolow shaping medium of certain pressure in pipe die cavity, and now mold clamping force was controlled by proportional pressure control valve according to the time, the starting stage, and mold clamping force is in smaller value; In the left and right feed supplement of cutting somebody's hair of guarantee, under not producing dead wrinkle in interior pressure, mold clamping force zone of reasonableness, not producing the load path of the prerequisite of lifting mould, blank fully walks material, substantially fills up mold cavity, minority large deformation district, local is only had not fill up, now, because mold clamping force is less, the abundant feed supplement of pipe, make pipe thickness almost not thinning, and the useful wrinkle favourable to post forming is formed in deformed area, rock deformation pressure is reduced, and pipe thickness is thinning few;
Follow-up increase mold clamping force, to prevent the generation of lifting mould phenomenon, meanwhile, pipe progressively fills up large deformation district, and part is shaped substantially; For ensureing that pipe is fitted mold cavity completely, continue progressively to improve mold clamping force, to adapt to the raising of charger boost pressure, when reaching maximum pressure boost, mold clamping force also reaches peak, and now, pipe has been fitted mold cavity completely;
Truing phase: for preventing producing rebound phenomena during part laminating die surface, requiring system pressurize a period of time under maximum pressure, maximum clamping force state, making pipe complete stability laminating die surface;
Reseting stage: booster is return, mold cavity pressure declines rapidly, and left and right cutting somebody's hair is return, and patrix lifts, and take out part, thus whole forming process completes.
The present invention becomes the forming high pressure in pipe method of mold clamping force compared with the existing forming high pressure in pipe method and technology determining mold clamping force, has the following advantages:
1, mold clamping force is become owing to adopting in forming process, dwell time is obviously shortened, requires obviously to reduce to the pressure maintaining performance of machine, simultaneously, pipe and die surface frictional force reduce, part feed supplement is easy, and need significantly to reduce during the pressure ratio constant tonnage of part forming medium, required mold clamping force is relatively low, machine tonnage reduces, the thrust cut somebody's hair in left and right reduces, and reduces manufacturing cost and the difficulty of processing of machine, is not easy generation simultaneously and lifts mould phenomenon.
2, because incipient stage feed supplement is abundant, forming pressure and shaping pressure are significantly reduced, and the part processed not easily produces defects such as breaking, makes thin-walled, distortion shaping that is large, complex shape part relatively easy.Also relatively low to the requirement of lubrication, also reduce blank tube material performance requirement, to the requirement on machining accuracy of mold materials and performance, mould, seal request is also relative reduces, and reduces performance requirements such as the structure of booster and pressure.
3, the pressure of tubing part forming medium reduces, and topping up time and venting duration, pressurization time is significantly shortened, significantly improves production efficiency.
4, adopt the manufacturing process becoming mold clamping force, when significantly can reduce machine matched moulds, be in the time of high pressure, reduce power of motor consumption, accomplish energy efficiency.
5, the quality of formation of parts can be significantly improved.Because feed supplement under low-pressure state is abundant, material flowability strengthens, and Reducing thickness during bulging significantly reduces, and fatigue strength is high, good rigidly.
Accompanying drawing explanation
Fig. 1, become the structural representation of the forming high pressure in pipe method of mold clamping force for the present invention.
Fig. 2 a-d is the course of work schematic diagram that the present invention becomes the forming high pressure in pipe method of mold clamping force.
Detailed description of the invention
Now in conjunction with the accompanying drawings and embodiments the present invention is described in further detail:
Structure as shown in Figure 1: 1 is patrix, 2 is counterdie, and 3 is mold cavity, and 4 for cutting somebody's hair on a left side, and 5 for cutting somebody's hair on the right side, and 6 is booster, and 7 is pipe, and 8 is charging device, and 9 is moved cross beam, and 10 is waterflood path.F is mold clamping force, and P is the operating pressure of mold cavity.
First, home position, patrix is in upper position, and counterdie is in home position, bottom, and left and right cutting somebody's hair all is in left and right home position, and pipe is in counterdie die cavity (as shown in Figure 2 a).Hydraulic press moved cross beam matched moulds pressurization during work, when reaching set initial sender pressure, thruster cylinder drives left, cut somebody's hair advance in the right side, when arriving mouth of pipe desired location, charging device is by being built in interior passage of cutting somebody's hair to pipe die cavity topping up, discharge the air in die cavity simultaneously, when reaching the setting topping up time, system sender, left, cut somebody's hair and move in the right side, airtight die cavity is formed at the mouth of pipe, when cavity pressure reaches certain pressure, system sender, topping up stops, booster injects the mesolow shaping medium of certain pressure in pipe die cavity, now mold clamping force was controlled by proportional pressure control valve according to the time, starting stage, mold clamping force is in smaller value, left in guarantee, cut somebody's hair feed supplement in the right side, interior pressure, dead wrinkle is not produced in mold clamping force zone of reasonableness, under not producing the load path of the prerequisite of lifting mould, blank fully walks material, substantially mold cavity is filled up, minority large deformation district, local is only had not fill up, now, because mold clamping force is less, the abundant feed supplement of pipe, make pipe thickness almost not thinning, the useful wrinkle favourable to post forming is formed especially in some deformed area, rock deformation pressure is reduced, pipe thickness is thinning few.Along with the raising of subsequent pressurization pressure, corresponding mold clamping force is corresponding raising also, and to prevent the generation of lifting mould phenomenon, meanwhile, pipe progressively fills up large deformation district, and part is shaped substantially (as shown in Figure 2 b).Final stage, for ensureing that pipe is fitted mold cavity completely, progressively improve mold clamping force, to adapt to the raising of charger boost pressure, when reaching maximum pressure boost, mold clamping force also reaches peak, and now, pipe has been fitted mold cavity completely.Part is finally shaped, and for preventing producing rebound phenomena during part laminating die surface, require system pressurize a period of time under maximum pressure, maximum clamping force state, make pipe complete stability laminating die surface, this section is shaping (as shown in Figure 2 c).After shaping completes, booster is return, and mold cavity pressure declines rapidly, and left and right cutting somebody's hair is return, and patrix lifts, and take out part, thus whole forming process completes (as shown in Figure 2 d).In whole forming process, feed phase in the early stage, mid-term shaping stage, later stage truing phase, the mold clamping force of system progressively increases progressively from small to large, reaches maximum to truing phase mold clamping force, realizes becoming mold clamping force internal high pressure forming technical process according to the whole forming process of part.
Claims (1)
1. one kind becomes the forming high pressure in pipe method of mold clamping force: it comprises the steps:
Starting stage: patrix is in home position, top, and counterdie is in home position, bottom, and cut somebody's hair and be all in home position, left and right in left and right, pipe is in counterdie die cavity;
Basic shaping stage: hydraulic press moved cross beam matched moulds pressurizes, when matched moulds reaches set initial sender pressure, thruster cylinder drives left and right advance of cutting somebody's hair; When described left and right cut somebody's hair arrive the mouth of pipe desired location time, charging device, by being built in interior passage of cutting somebody's hair to pipe die cavity topping up, discharges the air in pipe die cavity simultaneously; When reaching the predetermined topping up time, system sender, left and right cutting somebody's hair moves on, and forms airtight die cavity at the mouth of pipe; When described hermetic type cavity pressure reaches predetermined pressure, system sender, topping up stops;
Booster injects the mesolow shaping medium of certain pressure in pipe die cavity, and now clamping pressure was controlled by proportional pressure control valve according to the time, the starting stage, and mold clamping force is in smaller value; In the left and right feed supplement of cutting somebody's hair of guarantee, under not producing dead wrinkle in interior pressure, mold clamping force zone of reasonableness, not producing the load path of the prerequisite of lifting mould, blank fully walks material, substantially fills up mold cavity, minority large deformation district, local is only had not fill up, now, because mold clamping force is less, the abundant feed supplement of pipe, make pipe thickness almost not thinning, and the useful wrinkle favourable to post forming is formed in deformed area, rock deformation pressure is reduced, and pipe thickness is thinning few;
Follow-up increase mold clamping force, to prevent the generation of lifting mould phenomenon, meanwhile, pipe progressively fills up large deformation district, and part is shaped substantially; For ensureing that pipe is fitted mold cavity completely, continue progressively to improve mold clamping force, to adapt to the raising of charger boost pressure, when reaching maximum pressure boost, mold clamping force also reaches peak, and now, pipe has been fitted mold cavity completely;
Truing phase: for preventing producing rebound phenomena during part laminating die surface, requiring system pressurize a period of time under maximum pressure, maximum clamping force state, making pipe complete stability laminating die surface;
Reseting stage: booster is return, mold cavity pressure declines rapidly, and cut somebody's hair and return in left and right, patrix lifts, and take out part, thus whole forming process completes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310122898.5A CN103212619B (en) | 2013-04-10 | 2013-04-10 | Variable-mold-clamping-force pipe internal high-pressure forming device and method |
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| CN201310122898.5A CN103212619B (en) | 2013-04-10 | 2013-04-10 | Variable-mold-clamping-force pipe internal high-pressure forming device and method |
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| CN103212619A CN103212619A (en) | 2013-07-24 |
| CN103212619B true CN103212619B (en) | 2015-04-22 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103658294B (en) * | 2013-12-31 | 2015-10-28 | 一重集团大连设计研究院有限公司 | A kind of forming high pressure in pipe method |
| CN106734419B (en) * | 2015-11-23 | 2018-11-30 | 宁波思明汽车科技股份有限公司 | A kind of elbow member bulging prevents the corrugated method of interior angle |
| CN106734340B (en) * | 2015-11-23 | 2019-03-01 | 宁波思明汽车科技股份有限公司 | A kind of preparation method of bend pipe tee tube |
| CN105598248A (en) * | 2016-02-25 | 2016-05-25 | 浙江摩多巴克斯科技股份有限公司 | Device for increasing pipe wall thickness through internal high pressure forming and process thereof |
| CN106734495B (en) * | 2016-12-28 | 2018-05-01 | 柳州智臻智能机械有限公司 | A kind of forming high pressure in pipe method of Varied clearance |
| CN108723162B (en) * | 2017-07-13 | 2021-01-19 | 北京航空航天大学 | Method for forming tangential non-closed variable cross-section tubular part by fluid pressure induction |
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| DE19705244A1 (en) * | 1997-02-12 | 1998-08-13 | Huber & Bauer Gmbh | Forming device |
| DE19829577B4 (en) * | 1998-07-02 | 2005-06-16 | Carsten Dipl.-Ing. Binder | Method and device for producing parts by means of internal high-pressure forming technology |
| CN102172704B (en) * | 2011-01-21 | 2012-11-07 | 西安交通大学 | Large-tonnage pipe internal high-pressure forming device |
| CN102672026B (en) * | 2012-05-28 | 2014-03-26 | 哈尔滨工业大学 | Method for inhibiting martensite phase transformation in internal high-pressure forming of austenitic stainless steel pipe |
| CN103008431A (en) * | 2013-01-18 | 2013-04-03 | 哈尔滨工业大学 | Internal high-pressure forming machine with large operating space |
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Effective date of registration: 20240306 Address after: Room 305, 3rd Floor, Building 6, No. 209 Lu'an Road, Zhouxiang Town, Cixi City, Ningbo City, Zhejiang Province, 315000 Patentee after: Ningbo Zhongyi Techeng Intelligent Equipment Co.,Ltd. Country or region after: China Address before: 315324 No. 1666-1698 Zhouxi Road, Zhouxiang Town, Cixi City, Ningbo City, Zhejiang Province Patentee before: NINGBO POWER PRECISION HYDRAULIC MACHINERY Co.,Ltd. Country or region before: China |
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