CN105414240A - Hot extrusion forming method of special-shaped square tube - Google Patents
Hot extrusion forming method of special-shaped square tube Download PDFInfo
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- CN105414240A CN105414240A CN201510928424.9A CN201510928424A CN105414240A CN 105414240 A CN105414240 A CN 105414240A CN 201510928424 A CN201510928424 A CN 201510928424A CN 105414240 A CN105414240 A CN 105414240A
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- special
- square tube
- shaped square
- hot extrusion
- raw steel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/04—Making uncoated products by direct extrusion
- B21C23/08—Making wire, bars, tubes
- B21C23/085—Making tubes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Of Metal (AREA)
- Heat Treatment Of Articles (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a hot extrusion forming method of a special-shaped square tube. The special-shaped square tube is a square steel tube which is square outside and round inside. The forming method of the special-shaped square tube comprises steps as follows: (1), material inspecting and processing; (2), centering boring; (3), heating treatment; (4), molding ; (5), hot extrusion; (6), demolding; (7), post-processing. According to the hot extrusion forming method of the special-shaped square tube, the technological design is reasonable, the mold structure is simple, the operation is convenient and easy, the forming speed is high, the efficiency is high, and the method is applicable to large-scale industrial production and provides a guidance for the preparation of special-shaped tube stocks; furthermore, the prepared special-shaped square tube has a high finished product rate, high bending resistance and torsion resistance and excellent comprehensive property, and the application field of the special-shaped square tube is effectively broadened.
Description
Technical field
The present invention relates to shape tube field shaping technique, particularly relate to a kind of hot extrusion molding method of special-shaped square tube.
Background technology
Section tube all has crucial important application in fields such as automobile, heavy-duty machinery and Aero-Space.Existing special steel profile shapes is generally undertaken shaping by pressing, but the method complex process, shaping speed is slow, and be not suitable for large-scale mass production, efficiency is lower.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of hot extrusion molding method of special-shaped square tube, can solve the weak point that existing special section tubular product exists on moulding process, for the preparation of special section tubular product provides guidance.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: the hot extrusion molding method providing a kind of special-shaped square tube, described special-shaped square tube is the square steel tube of square-outside and round-inside, and its forming method comprises the steps:
(1) examination of materials and process: carry out ultrasonic wave and magnetic powder inspection to raw steel, then cleans the greasy dirt of raw steel all surface, after clear water is rinsed well, and scale sawing;
(2) centering bore hole: the raw steel after sawing in step (1) is fixed, bore boring endoporus centered by its central shaft;
(3) heat: the raw steel after bore hole in step (2) is placed in program heating furnace and carries out preheating and heating;
(4) patrix: the endoporus of the raw steel after heating in step (3) is nested with on die mandrel also fixing;
(5) hot extrusion: load hydraulic press by horizontal type level, adopts the mode of determining journey level pressure to carry out hot extrusion to the raw steel after patrix in step (4);
(6) demoulding: utilize drawbench to extract plug out, realize the demoulding, obtain crude product special-shaped square tube;
(7) post processing: by the crude product special-shaped square tube after the demoulding through Quenching Treatment and end face polishing, obtain finished product special-shaped square tube.
In a preferred embodiment of the present invention, in described step (2), the diameter of bore after described brill boring is the interior circular diameter of described special-shaped square tube.
In a preferred embodiment of the present invention, in described step (3), preheating in described program heating furnace and heating treatment process are: under atmosphere of inert gases, first with ramp to 400 ~ 600 DEG C of 30 ~ 50 DEG C/min, and constant temperature keeps 1 ~ 2h to carry out preheating, and then be rapidly heated to 1100 ~ 1200 DEG C with the speed of 100 ~ 150 DEG C/min, heat 30 ~ 60min.
In a preferred embodiment of the present invention, in described step (5), the process conditions of described hot extrusion are: extrusion ratio 11 ~ 13, extruding force 20 ~ 25MN, extrusion speed 110 ~ 135mm/s.
In a preferred embodiment of the present invention, in described step (5), the condition of described Quenching Treatment is: hot compression blowing inert gas quenches, one-level hardening heat 150 ~ 180 DEG C, time 10 ~ 20min, secondary hardening heat 120 ~ 145 DEG C, time 10 ~ 15min.
In a preferred embodiment of the present invention, described inert gas is neon.
The invention has the beneficial effects as follows: the hot extrusion molding method of a kind of special-shaped square tube of the present invention, its technological design is reasonable, mould structure is simple, and operating aspect is easy, and shaping speed is fast, efficiency is high, be suitable for mass industrialized production, for the preparation of special section tubular product provides guidance, and the yield rate of special-shaped square tube of preparation is high, bending resistance and anti-twisting property strong, excellent combination property, has effectively expanded the application of special-shaped square tube.
Detailed description of the invention
Below preferred embodiment of the present invention is described in detail, can be easier to make advantages and features of the invention be readily appreciated by one skilled in the art, thus more explicit defining is made to protection scope of the present invention.
The embodiment of the present invention comprises:
Embodiment 1
The present invention discloses a kind of hot extrusion molding method of special-shaped square tube, and described special-shaped square tube is the square steel tube of square-outside and round-inside, and it is of a size of 65mm side × φ 40mm, and length is 3m, and its forming method comprises the steps:
(1) examination of materials and process: carry out ultrasonic wave and magnetic powder inspection to raw steel, then cleans the greasy dirt of raw steel all surface, after clear water is rinsed well, and scale sawing;
(2) centering bore hole: the raw steel after sawing in step (1) is fixed, bores boring endoporus centered by its central shaft, make diameter of bore be 40mm;
(3) heat: the raw steel after bore hole in step (2) is placed in program heating furnace and carries out preheating and heating; Process conditions are: under inertia neon atmosphere, and first with the ramp to 400 DEG C of 30 DEG C/min, and constant temperature keeps 2h to carry out preheating, and then is rapidly heated to 1100 DEG C with the speed of 100 DEG C/min, heats 60min;
(4) patrix: the endoporus of the raw steel after heating in step (3) is nested with on die mandrel also fixing;
(5) hot extrusion: load hydraulic press by horizontal type level, adopt the mode of determining journey level pressure to carry out hot extrusion to the raw steel after patrix in step (4), concrete technology condition is: extrusion ratio 11, extruding force 20MN, extrusion speed 110mm/s;
(6) demoulding: utilize drawbench to extract plug out, realize the demoulding, obtain crude product special-shaped square tube;
(7) post processing: by the crude product special-shaped square tube after the demoulding after inert gas medium neon Quenching Treatment, then polishing is carried out to end face, obtain finished product special-shaped square tube; Wherein Quenching Treatment point two-stage is carried out, and actual conditions is: one-level is quenched, temperature 150 DEG C, time 20min; Secondary quenches, temperature 120 DEG C, time 15min.
Embodiment 2
The present invention discloses a kind of hot extrusion molding method of special-shaped square tube, and described special-shaped square tube is the square steel tube of square-outside and round-inside, and it is of a size of 70mm side × φ 48mm, and length is 3m, and its forming method comprises the steps:
(1) examination of materials and process: carry out ultrasonic wave and magnetic powder inspection to raw steel, then cleans the greasy dirt of raw steel all surface, after clear water is rinsed well, and scale sawing;
(2) centering bore hole: the raw steel after sawing in step (1) is fixed, bores boring endoporus centered by its central shaft, make diameter of bore be 40mm;
(3) heat: the raw steel after bore hole in step (2) is placed in program heating furnace and carries out preheating and heating; Process conditions are: under inertia neon atmosphere, and first with the ramp to 600 DEG C of 50 DEG C/min, and constant temperature keeps 1h to carry out preheating, and then is rapidly heated to 1200 DEG C with the speed of 150 DEG C/min, heats 30min;
(4) patrix: the endoporus of the raw steel after heating in step (3) is nested with on die mandrel also fixing;
(5) hot extrusion: load hydraulic press by horizontal type level, adopt the mode of determining journey level pressure to carry out hot extrusion to the raw steel after patrix in step (4), concrete technology condition is: extrusion ratio 13, extruding force 25MN, extrusion speed 135mm/s;
(6) demoulding: utilize drawbench to extract plug out, realize the demoulding, obtain crude product special-shaped square tube;
(7) post processing: by the crude product special-shaped square tube after the demoulding after inert gas medium neon Quenching Treatment, then polishing is carried out to end face, obtain finished product special-shaped square tube; Wherein Quenching Treatment point two-stage is carried out, and actual conditions is: one-level is quenched, temperature 180 DEG C, time 10min; Secondary quenches, temperature 145 DEG C, time 10min.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (6)
1. a hot extrusion molding method for special-shaped square tube, is characterized in that, described special-shaped square tube is the square steel tube of square-outside and round-inside, and its forming method comprises the steps:
(1) examination of materials and process: carry out ultrasonic wave and magnetic powder inspection to raw steel, then cleans the greasy dirt of raw steel all surface, after clear water is rinsed well, and scale sawing;
(2) centering bore hole: the raw steel after sawing in step (1) is fixed, bore boring endoporus centered by its central shaft;
(3) heat: the raw steel after bore hole in step (2) is placed in program heating furnace and carries out preheating and heating;
(4) patrix: the endoporus of the raw steel after heating in step (3) is nested with on die mandrel also fixing;
(5) hot extrusion: load hydraulic press by horizontal type level, adopts the mode of determining journey level pressure to carry out hot extrusion to the raw steel after patrix in step (4);
(6) demoulding: utilize drawbench to extract plug out, realize the demoulding, obtain crude product special-shaped square tube;
(7) post processing: by the crude product special-shaped square tube after the demoulding through Quenching Treatment and end face polishing, obtain finished product special-shaped square tube.
2. the hot extrusion molding method of special-shaped square tube according to claim 1, is characterized in that, in described step (2), the diameter of bore after described brill boring is the interior circular diameter of described special-shaped square tube.
3. the hot extrusion molding method of special-shaped square tube according to claim 1, it is characterized in that, in described step (3), preheating in described program heating furnace and heating treatment process are: under atmosphere of inert gases, first with ramp to 400 ~ 600 DEG C of 30 ~ 50 DEG C/min, and constant temperature keeps 1 ~ 2h to carry out preheating, and then be rapidly heated to 1100 ~ 1200 DEG C with the speed of 100 ~ 150 DEG C/min, heat 30 ~ 60min.
4. the hot extrusion molding method of special-shaped square tube according to claim 1, is characterized in that, in described step (5), the process conditions of described hot extrusion are: extrusion ratio 11 ~ 13, extruding force 20 ~ 25MN, extrusion speed 110 ~ 135mm/s.
5. the hot extrusion molding method of special-shaped square tube according to claim 1, it is characterized in that, in described step (5), the condition of described Quenching Treatment is: hot compression blowing inert gas quenches, one-level hardening heat 150 ~ 180 DEG C, time 10 ~ 20min, secondary hardening heat 120 ~ 145 DEG C, time 10 ~ 15min.
6. the hot extrusion molding method of the special-shaped square tube according to claim 3 or 5, is characterized in that, described inert gas is neon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510928424.9A CN105414240A (en) | 2015-12-15 | 2015-12-15 | Hot extrusion forming method of special-shaped square tube |
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| CN201510928424.9A CN105414240A (en) | 2015-12-15 | 2015-12-15 | Hot extrusion forming method of special-shaped square tube |
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| CN105414240A true CN105414240A (en) | 2016-03-23 |
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| CN201510928424.9A Pending CN105414240A (en) | 2015-12-15 | 2015-12-15 | Hot extrusion forming method of special-shaped square tube |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107052117A (en) * | 2017-04-14 | 2017-08-18 | 刘得胜 | A kind of forming method of special section tubular product |
| CN111185491A (en) * | 2019-12-27 | 2020-05-22 | 国机金属江苏有限公司 | Hot extrusion method of MonelK-500 hexagonal rod |
| CN111229861A (en) * | 2019-12-28 | 2020-06-05 | 国机金属江苏有限公司 | Production method of special-shaped small-inner-diameter pipe made of double-grade material |
| WO2021208999A1 (en) * | 2020-04-15 | 2021-10-21 | 钢铁研究总院 | Hot extrusion die for irregularly shaped rectangular tubing, and hot extrusion integral molding method |
Citations (5)
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|---|---|---|---|---|
| JP2000042627A (en) * | 1998-07-29 | 2000-02-15 | Showa Alum Corp | Manufacture of metallic extruding hollow stock |
| CN104043769A (en) * | 2013-03-14 | 2014-09-17 | 雷帮荣 | Direct molding process for hot-extruded hollow axle |
| CN104307921A (en) * | 2014-10-20 | 2015-01-28 | 张家港市人和高精管有限公司 | Seamless steel tube production process |
| CN104498849A (en) * | 2014-12-05 | 2015-04-08 | 宁夏东方钽业股份有限公司 | Process for preparing Ti662 titanium alloy tube material |
| CN105033575A (en) * | 2015-06-23 | 2015-11-11 | 中山市鸿程科研技术服务有限公司 | Machining technology of high-pressure flange |
-
2015
- 2015-12-15 CN CN201510928424.9A patent/CN105414240A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000042627A (en) * | 1998-07-29 | 2000-02-15 | Showa Alum Corp | Manufacture of metallic extruding hollow stock |
| CN104043769A (en) * | 2013-03-14 | 2014-09-17 | 雷帮荣 | Direct molding process for hot-extruded hollow axle |
| CN104307921A (en) * | 2014-10-20 | 2015-01-28 | 张家港市人和高精管有限公司 | Seamless steel tube production process |
| CN104498849A (en) * | 2014-12-05 | 2015-04-08 | 宁夏东方钽业股份有限公司 | Process for preparing Ti662 titanium alloy tube material |
| CN105033575A (en) * | 2015-06-23 | 2015-11-11 | 中山市鸿程科研技术服务有限公司 | Machining technology of high-pressure flange |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107052117A (en) * | 2017-04-14 | 2017-08-18 | 刘得胜 | A kind of forming method of special section tubular product |
| CN111185491A (en) * | 2019-12-27 | 2020-05-22 | 国机金属江苏有限公司 | Hot extrusion method of MonelK-500 hexagonal rod |
| CN111229861A (en) * | 2019-12-28 | 2020-06-05 | 国机金属江苏有限公司 | Production method of special-shaped small-inner-diameter pipe made of double-grade material |
| WO2021208999A1 (en) * | 2020-04-15 | 2021-10-21 | 钢铁研究总院 | Hot extrusion die for irregularly shaped rectangular tubing, and hot extrusion integral molding method |
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Application publication date: 20160323 |