CN104492902A - Production device of heat molding and water cooling process of uniform-section boron steel pipes - Google Patents
Production device of heat molding and water cooling process of uniform-section boron steel pipes Download PDFInfo
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- CN104492902A CN104492902A CN201410741086.3A CN201410741086A CN104492902A CN 104492902 A CN104492902 A CN 104492902A CN 201410741086 A CN201410741086 A CN 201410741086A CN 104492902 A CN104492902 A CN 104492902A
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Abstract
The invention relates to a production device of a heat molding and water cooling process of uniform-section boron steel pipes. The production device is characterized by comprising a pressure machine, wherein a heat molding mold is mounted in the pressure machine; sealing heads are arranged at two ends of the heat molding mold; the front ends of the sealing heads are in contact with uniform-section boron steel pipe workpieces; the rear ends of the sealing heads are connected with an axial hydraulic system; cold water channels are arranged in the centers of the sealing heads; the front ends of the cold water channels are communicated with the interiors of the boron steel pipe workpieces; the rear ends of the cold water channels are connected with an axial water cooling system; the axial water cooling system comprises a water cooler and a water storage tank; the water inlet end of the water cooler is connected with the water storage tank; the water outlet end of the water cooler is connected with one end of each cold water channel of each sealing head; the other end of each cold water channel is connected with a water discharging pipeline; a pressure regulation valve and a temperature measuring instrument are respectively arranged on the water inlet pipeline and the water outlet pipeline. The production device of the heat molding and water cooling process of the uniform-section boron steel pipes is capable of producing workpieces with material mechanical strength of 1500MPa and invariable section shape and perimeter.
Description
Technical field
The present invention relates to a kind of hot forming and water-cooling process production equipment of uiform section boron steel steel pipe, belong to heat treatment Plastic Forming and technical field of heat treatment.
Background technology
Boron steel steel pipe is as a series of hot forming steel pipe, and production technology is divided into shaping and 2 stages of quench cooled, wherein: shaping stage needs at high temperature to be shaped by mould punching; The quench cooled stage needs by controlling certain cooling velocity, the transformation from austenite microstructure to martensite microstructure can occur, obtain high intensity and hardness; Different according to boron steel kind, its intensity can reach 500 ~ 2000MPa.After common hot forming, to reach the boron steel chemical composition of 1500MPa as shown in table 1 for intensity.
Table 1
| C | Si | Mn | P | S | Cr | B | |
| min | 0.20 | 0.20 | 1.00 | - | - | 0.15 | 0.0015 |
| max | 0.25 | 0.35 | 1.30 | 0.025 | 0.015 | 0.25 | 0.0050 |
Pipe fitting internal high pressure forming technique, utilize the pressure that high-pressure fluid produces, fill and serve as punch in pipe fitting A inside, the outside mould steel B with shape of product serves as die, and experience feeds intake, mould is closed, priming fluid in pipe fitting, the axial pusher of pressurization, simultaneously axial liquid cylinder pressure is shaped and die sinking feeding several stage completes pipe fitting forming.Wherein, according to the needs of product and formability, process successively has intersection.
Pipe fitting internal high pressure forming technique, usually its front road will be combined with bend pipe and/or preforming process, before internal high pressure forming technique, obtain the part with final workpiece shapes size basic simlarity, avoid producing material folding in high-pressure forming mold closing course simultaneously, avoid in forming process, occurring cracking and the defect such as wrinkling.If above problem can be avoided, bend pipe and/or preforming process can be saved, directly carry out inner high voltage.For simple meter, bend pipe and/or preforming process the present invention no longer discuss in detail.
Current common pipe fitting forming technique is internal high pressure forming under normal temperature.Be limited to the restriction of tube-making process and material its own mechanical performance, the pipe fitting limited strength applied, tensile strength is difficult to more than 1000MPa.
Current common boron steel Steel Pipe Heat is shaped and mostly is ordinary hot Sheet Metal Forming Technology, wherein again based on the product of uiform section girth.The production of this series products adopts two kinds of techniques usually: one is that cold stamping is shaped completely, carries out the heat treatment such as impewdance matching, obtains martensitic structure.But the shortcoming of this method is that quenching production efficiency is low, and the operation of workpiece is many and complicated, comprise cold stamping shaping and the large operation of impewdance matching two, manufacturing cost is high.
Another kind of technique is after cold stamping preformed, complete final shaping at thermoforming station by hot-forming die, and embed pipe fitting hollow interior at the two ends of workpiece with mould end socket, be equivalent to die punch, and in the internal placement water route of mould and end socket, complete the quick cooling to workpiece.But the shortcoming of this method is the middle part of workpiece, particularly end socket cannot be formed with mould foremost and closely cooperate, thus low at this region cooling effectiveness, usually cannot form martensitic structure, become in " depression " of product strength.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of hot forming and water-cooling process production equipment of uiform section boron steel steel pipe is provided, mechanical strength can be produced and reach the constant workpiece of 1500MPa, cross sectional shape and girth.
According to technical scheme provided by the invention, the hot forming of described uiform section boron steel steel pipe and water-cooling process production equipment, it is characterized in that: comprise forcing press, in forcing press, hot-forming die is installed, hot-forming die comprises upper bolster and die shoe, install contour forming insert at upper bolster lower surface, contour forming insert under die shoe upper surface is installed, the lower surface of upper contour forming insert and the upper surface of lower contour forming insert are the forming surface of boron steel steel pipe workpieces; At the two ends of described hot-forming die, end socket is set respectively, the front end of end socket contacts with the pipe end of boron steel steel pipe workpieces, the rear end of end socket is connected with axial hydraulic system, at the end socket center at hot-forming die two ends, cooling-water duct is set respectively, the front end of cooling-water duct is communicated with the inside of boron steel steel pipe workpieces, and the rear end connecting axle of cooling-water duct is to water-cooling system; Described axial water-cooled system comprises water cooling unit and cistern, the water inlet end of water cooling unit connects cistern, the water side of water cooling unit is connected with the cooling-water duct one end on end socket by inlet pipeline, the cooling-water duct other end connects outlet pipeline, inlet pipeline and outlet pipeline arrange pressure-regulating valve and temperature measuring set respectively, and outlet pipeline connects the water inlet end of water cooling unit by water pump.
Further, described water cooling unit controls the inflow temperature 2 ~ 40 degree to end socket input.
Further, described pipe fitting hot forming production equipment also comprises firing equipment, feeding conveying device and blanking transmission and gathering-device.
Further, described feeding conveying device adopts robot and/or conveyer belt.
Further, described blanking transmission and gathering-device comprise material loading translator unit and collection part, and material loading translator unit adopts robot or/and conveyer belt, collect part and adopt robot or/and conveyer belt.
Further, described axial hydraulic system comprises hydraulic cylinder or cylinder.
Further, described forcing press adopts frame-type hydraulic press or mechnical servo press.
Compared with prior art, the present invention has the following advantages:
(1) the present invention can obtain the high tensile steel tube of intensity up to 1500MPa;
(2) the present invention is compared to gas high pressure Bulging Technology more simple economy, can design R fillet very little under the constant prerequisite of product girth, thus the final good product of workpiece performance.
(3) the present invention at high temperature carries out hot forming to workpiece, effectively can reduce the press forming power being shaped and needing.Along with the rising of temperature, the yield strength of boron steel material reduces rapidly, and percentage elongation improves, therefore, and internal high pressure forming technics comparing under normal temperature, press forming power greatly reduces.Reach equal or the part of similar intensity, compare with internal high pressure forming under normal temperature, press pressure needed for hot forming can be reduced to the 1/3 even lower of internal high pressure forming under normal temperature, the intensity of such as automobile DP1000 dual phase steel is 1000MPa, more much lower than the intensity 1500MPa of boron steel after hot forming, but the forcing press that under normal temperature, inner high voltage DP1000 steel tube place is equipped with is generally 5000 tons, and the forcing press that uiform section hot forming steel tube place is equipped with can be set to 800 tons;
(4) the present invention is in quenching process, passes into low middle cooling water pressure, can obtain uniform martensitic structure in pipe fitting, mechanical performance etc. evenly.
(5) the present invention is direct hot forming quenching technical, without resilience after quenching., all there is the problem of resilience after component shaping in internal high pressure forming technique under existing pipe fitting normal temperature, mould usually will repeatedly die trial---machined---die trial, regulates springback compensation amount, reaches qualified size; The pressurize of heat forming technology quenching process, without resilience after the martensitic structure obtained.
Accompanying drawing explanation
Fig. 1 is the structural representation of pipe fitting hot forming of the present invention and water-cooling process production equipment.
Fig. 2 is cooling water control schematic diagram.
Fig. 3 is the schematic diagram of described hot-forming die.
Sequence number in figure: upper contour forming insert 1, lower contour forming insert 2, boron steel steel pipe workpieces 3, end socket 6, cooling-water duct 7, forcing press 8, upper bolster 9, die shoe 10, axial hydraulic system 11, axial water-cooled system 12, water cooling unit 12-1, cistern 12-2, pressure-regulating valve 12-3, temperature measuring set 12-4, water pump 12-5.
Detailed description of the invention
Below in conjunction with concrete accompanying drawing, the invention will be further described.
As shown in Figure 1: hot forming and the water-cooling process production equipment of uiform section boron steel steel pipe of the present invention comprise forcing press 8, in forcing press 8, hot-forming die is installed, hot-forming die comprises upper bolster 9 and die shoe 10, upper bolster 9 and die shoe 10 give boron steel steel pipe workpieces applied pressure for transmission and bearing pressure machine 8, the material of upper bolster 9 and die shoe 10 selects the foundry goods such as QT600, HT300, GM241, and the steel plate splicings such as 45# also can be selected to form; Install contour forming insert 1 at described upper bolster 9 lower surface, contour forming insert 2 under die shoe 10 upper surface is installed, the lower surface of upper contour forming insert 1 and the upper surface of lower contour forming insert 2 are the forming surface of boron steel steel pipe workpieces 3; At the two ends of described hot-forming die, end socket 6 is set respectively, the front end of end socket 6 contacts with the pipe end of boron steel steel pipe workpieces 3, the rear end of end socket 6 is connected with axial hydraulic system 11 (axial liquid cylinder pressure or cylinder), at end socket 6 center at hot-forming die two ends, cooling-water duct 7 is set respectively, the front end of cooling-water duct 7 is communicated with the inside of boron steel steel pipe workpieces 3, and the rear end connecting axle of cooling-water duct 7 is to water-cooling system 12;
As shown in Figure 2, described axial water-cooled system 12 comprises water cooling unit 12-1 and cistern 12-2, the water inlet end of water cooling unit 12-1 connects cistern 12-2, the water side of water cooling unit 12-1 is connected with cooling-water duct 7 one end on end socket 6 by inlet pipeline, water cooling unit controls the inflow temperature 2 ~ 40 degree inputted to end socket 6, cooling-water duct 7 other end connects outlet pipeline, inlet pipeline and outlet pipeline arrange pressure-regulating valve 12-3 and temperature measuring set 12-4 respectively, and pressure-regulating valve 12-3 can pass through controller gauge tap; Described outlet pipeline connects the water inlet end of water cooling unit 12-1 by water pump 12-5, thus realizes recycling of cooling water, and water pump 12-5 is fixed with production line size and workpiece size; Operationally, mould axial pressurizing, packing stage, axial water-cooled system 12 exports cooling water to end socket 6, in the scope being no more than 0.1 ~ 25MPa, export cooling water by control valve and air inlet pipeline; In the axial release stage, realize pressure relief by valve and outlet pipe, by the gases at high pressure release exported;
Described axial hydraulic system 11 comprises hydraulic cylinder or cylinder, promotes axial feed and the retrogressing of hot-forming die axial two ends end socket 6, and then realizes the feeding pressurization of hot-forming die axis, pressurize, release and die sinking; Described axial hydraulic system 11 also comprises hydraulic pump, hydraulic valve, mould shaft to auxiliary elements such as end socket hydraulic cylinder speed and displacement sensor, electric-control system, pipeline, joint and fuel tanks, the preferred 15-32MPa of operating pressure, speed is adjustable arbitrarily with change in displacement within the scope of 0-80mm/s, and displacement is adjustable arbitrarily within the scope of impulse stroke;
Pipe fitting hot forming of the present invention and water-cooling process production equipment also comprise firing equipment, feeding conveying device and blanking transmission and gathering-device; Described heater is used for boron steel steel pipe workpieces to be heated to 850 ~ 950 DEG C, makes steel pipe uniform austenitic; Described feeding conveying device is for being sent to forcing press by the boron steel steel pipe workpieces after heating with certain speed, and feeding conveying device is preferably robot and/or conveyer belt; Described blanking transmission and gathering-device are used for after die sinking, and the boron steel steel pipe workpieces after being shaped is sent out forcing press, and collect boron steel steel pipe workpieces at assigned address; Described feeding conveying device comprises material loading translator unit and collection part, and material loading translator unit adopts robot or/and conveyer belt, collects part and adopts robot or/and conveyer belt, or by manually casing;
Described forcing press 8 adopts frame-type hydraulic press or mechnical servo press, and in the matched moulds stage, forcing press 8 is descending, and drawing velocity changes in the amplitude of 0 ~ 900mm/s, preferably can Freely input data regulate; At mould axial feed, packing stage, position that forcing press 8 can need arbitrarily in stroke range stops 0-300s, realizes pressure holding function after matched moulds; Press tonnage has difference according to produced product, wherein, for obtaining martensitic structure, should ensure that the unit projection area pressure of pressing direction is not less than 1MPa; In the die sinking stage, forcing press is fast uplink in the velocity interval of 0 ~ 900mm/s.
Embodiment one: the inflatable heat forming technology of described boron steel steel pipe, the material of boron steel steel pipe: boron steel 22MnB5, expects thick 2.6mm, uiform section external diameter 100mm, length 850mm;
Above-mentioned workpiece specifically processes process by following steps:
1, boron steel straight tube is got the raw materials ready, and expects thick 2.6mm, external diameter 100mm, length 1000mm;
2, in heater, 900 DEG C are heated to by the complete austenitizing of boron steel pipe;
3, within 6 seconds, boron steel materials in the tube are placed in a mold, press initial openings height 800mm, and, shaping closed with the speed of 300mm/s;
4, the axial cylinder in mould both sides promotes its front-end end enclosure and seals pipe fitting, forms airtight cavity;
5, by mould end socket front end cooling water path, be filled with cooling water, pressure 2.5MPa in pipe fitting airtight cavity, press pressure 300 tons, part hot forming completes;
6, after hot forming completes, forcing press stays on and is reaching lower dead point position, is kept closed, and maintain the gas pressure intensity 3 seconds of the press pressure of 300 tons and 2.5MPa, part pressurize has been quenched;
7, take out workpiece, obtain the martensitic structure that intensity is 1500MPa;
8, radium-shine hot pressing bulging part two ends, obtain required size workpiece.
Claims (7)
1. the hot forming of a uiform section boron steel steel pipe and water-cooling process production equipment, it is characterized in that: comprise forcing press (8), in forcing press (8), hot-forming die is installed, hot-forming die comprises upper bolster (9) and die shoe (10), contour forming insert (1) is installed at upper bolster (9) lower surface, contour forming insert (2) under die shoe (10) upper surface is installed, the lower surface of upper contour forming insert (1) and the upper surface of lower contour forming insert (2) they are the forming surface of boron steel steel pipe workpieces (3); End socket (6) is set respectively at the two ends of described hot-forming die, the front end of end socket (6) contacts with the pipe end of boron steel steel pipe workpieces (3), the rear end of end socket (6) is connected with axial hydraulic system (11), at end socket (6) center at hot-forming die two ends, cooling-water duct (7) is set respectively, the front end of cooling-water duct (7) is communicated with the inside of boron steel steel pipe workpieces (3), and the rear end connecting axle of cooling-water duct (7) is to water-cooling system (12); Described axial water-cooled system (12) comprises water cooling unit (12-1) and cistern (12-2), the water inlet end of water cooling unit (12-1) connects cistern (12-2), the water side of water cooling unit (12-1) is connected with cooling-water duct (7) one end on end socket (6) by inlet pipeline, cooling-water duct (7) other end connects outlet pipeline, inlet pipeline and outlet pipeline arrange pressure-regulating valve (12-3) and temperature measuring set (12-4) respectively, and outlet pipeline connects the water inlet end of water cooling unit (12-1) by water pump (12-5).
2. the hot forming of uiform section boron steel steel pipe as claimed in claim 1 and water-cooling process production equipment, is characterized in that: described water cooling unit (12-1) controls the inflow temperature 2 ~ 40 degree inputted to end socket (6).
3. the hot forming of uiform section boron steel steel pipe as claimed in claim 1 and water-cooling process production equipment, is characterized in that: described pipe fitting hot forming production equipment also comprises firing equipment, feeding conveying device and blanking transmission and gathering-device.
4. the hot forming of uiform section boron steel steel pipe as claimed in claim 3 and water-cooling process production equipment, is characterized in that: described feeding conveying device adopts robot and/or conveyer belt.
5. the hot forming of uiform section boron steel steel pipe as claimed in claim 3 and water-cooling process production equipment, it is characterized in that: described blanking transmission and gathering-device comprise material loading translator unit and collection part, material loading translator unit adopts robot or/and conveyer belt, collects part and adopts robot or/and conveyer belt.
6. the hot forming of uiform section boron steel steel pipe as claimed in claim 1 and water-cooling process production equipment, is characterized in that: described axial hydraulic system comprises hydraulic cylinder or cylinder.
7. the hot forming of uiform section boron steel steel pipe as claimed in claim 1 and water-cooling process production equipment, is characterized in that: described forcing press adopts frame-type hydraulic press or mechnical servo press.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410741086.3A CN104492902A (en) | 2014-12-08 | 2014-12-08 | Production device of heat molding and water cooling process of uniform-section boron steel pipes |
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| CN201410741086.3A CN104492902A (en) | 2014-12-08 | 2014-12-08 | Production device of heat molding and water cooling process of uniform-section boron steel pipes |
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| CN104492902A true CN104492902A (en) | 2015-04-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108977644A (en) * | 2018-09-29 | 2018-12-11 | 张化机（苏州）重装有限公司 | End socket water cooling exhaust tooling |
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| EP2446977A1 (en) * | 2010-11-02 | 2012-05-02 | Kirchhoff Automotive Deutschland GmbH | Method for producing a tubular profile |
| DE102013105361A1 (en) * | 2013-05-24 | 2014-11-27 | Thyssenkrupp Steel Europe Ag | Method and device for producing a molded component |
| CN204338656U (en) * | 2014-12-08 | 2015-05-20 | 无锡朗贤汽车组件研发中心有限公司 | The hot forming of uiform section boron steel steel pipe and water-cooling process production equipment |
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2014
- 2014-12-08 CN CN201410741086.3A patent/CN104492902A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6261392B1 (en) * | 1997-05-30 | 2001-07-17 | Accra Teknik Ab | Method for manufacturing quenched thin-walled metal hollow casing by blow-moulding |
| US20060059974A1 (en) * | 2004-09-21 | 2006-03-23 | Hwashin Co., Ltd. | Apparatus for forming beam member used for torsion beam for rear wheel suspension of automobile |
| US20080289393A1 (en) * | 2007-05-23 | 2008-11-27 | Hwashin Co., Ltd. | Hot forming and in-situ cooling of metallic articles |
| EP2446977A1 (en) * | 2010-11-02 | 2012-05-02 | Kirchhoff Automotive Deutschland GmbH | Method for producing a tubular profile |
| DE102013105361A1 (en) * | 2013-05-24 | 2014-11-27 | Thyssenkrupp Steel Europe Ag | Method and device for producing a molded component |
| CN204338656U (en) * | 2014-12-08 | 2015-05-20 | 无锡朗贤汽车组件研发中心有限公司 | The hot forming of uiform section boron steel steel pipe and water-cooling process production equipment |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108977644A (en) * | 2018-09-29 | 2018-12-11 | 张化机（苏州）重装有限公司 | End socket water cooling exhaust tooling |
| CN108977644B (en) * | 2018-09-29 | 2023-11-21 | 张化机（苏州）重装有限公司 | Exhaust tool for water cooling of seal head |
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