CN100999052A - Forge welding technological method for large circle-shaped thin wall structure parts - Google Patents
Forge welding technological method for large circle-shaped thin wall structure parts Download PDFInfo
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- CN100999052A CN100999052A CN 200610146292 CN200610146292A CN100999052A CN 100999052 A CN100999052 A CN 100999052A CN 200610146292 CN200610146292 CN 200610146292 CN 200610146292 A CN200610146292 A CN 200610146292A CN 100999052 A CN100999052 A CN 100999052A
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Abstract
The present invention discloses a forge welding process of large-size square-ring-shaped thin-walled structure component. Said forge welding process includes the following steps: (1), forging raw material to obtain blank; (2), die forging-forming; (3) heat bending-forming by means of die; (4) making group welding, before welding making preheating treatment, adopting welding mould and adopting mixed gas shielded welding, after welding making heat-insulating treatment; and (5) making thermal refining treatment.
Description
Affiliated technical field
The present invention relates to a kind of metal forming process, is a kind of few forge welding technological method that does not have cutting specifically.
Background technology
The parts of large-scale Back Word type structure, its design feature are hollow, thin-walled, rib height, and the general employing casting technique of these parts is made.Because manufacture method itself can cause the product of manufacturing to have defectives such as shrinkage porosite, crackle, the mechanical performance of the feasible parts of being produced can not satisfy high strength, endurance, long-life instructions for use.Take the locomotive, passenger vehicle and the lorry that use on the railway to be example, raising again and again along with travel speed, a lot of parts that adopt casting technique to produce in the past, mechanical performances such as its anti-vibration resistance, resistance to impact and strength rigid, endurance, do not reach requirement, people begin to seek new technology and make continuous proposition requirements at the higher level, have the more manufacturing process of high strength, endurance, long-life parts.In recent years, people begin to utilize forging and heat treatment technics to improve the mechanical performance of said parts, this type component is adopted whole contour forging technique method, but said contour forging technique method can cause a large amount of wastes of material.According to surveying and determination, adopt said contour forging technique method process component, the effective rate of utilization of material is less than 40%, and subsequent handling need carry out a large amount of machining, just can reach requirement, and manufacturing cost is too expensive.Before the forge welding technological method of the large circle-shaped thin wall structure parts that the present invention relates to is finished, not seeing the process identical with the present invention uses in people's routine work, the product of not seeing the forge welding technological method production of adopting the large circle-shaped thin wall structure parts that the present invention relates to uses in daily work, and forge welding technological method of also not seeing the large circle-shaped thin wall structure parts that the present invention relates to and products thereof is on the books in the literature.
Summary of the invention
The object of the present invention is to provide a kind of forge welding technological method of large circle-shaped thin wall structure parts, adopt the parts of said forge welding technological method manufacturing, have more high strength, the characteristics of endurance, longer service life more, and economical with materials, need not a large amount of machining, manufacturing cost reduces.
For achieving the above object, the present invention adopts following technical proposals:
The forge welding technological method of large circle-shaped thin wall structure parts comprises the following steps:
The first step: raw material are forged base;
Second step: the workpiece that will forge into base carries out die-forging forming;
The 3rd step: carry out the simmering and bending moulding, adopt mould to carry out simmering and bending;
The 4th step: carry out assembly welding, carry out preheating before the welding, adopt weld mold, mixed gas arc welding will be incubated processing after the welding;
The 5th step: carry out modified heat treatment.
The product that the forge welding technological method of large circle-shaped thin wall structure parts is produced, said product is to produce according to the forge welding technological method of large circle-shaped thin wall structure parts recited above.
The present invention has following effect and good effect:
The invention provides a kind of forge welding technological method of large circle-shaped thin wall structure parts, adopt the parts of said forging and the manufacturing of welding process combined method, have more high strength, the characteristics of endurance, longer service life more, and economical with materials, need not a large amount of machining, manufacturing cost reduces.
Description of drawings
Below in conjunction with drawings and Examples content of the present invention is done explanation in further detail.
Fig. 1 is that schematic diagram is looked on the embodiment of the invention 1 a railway freight car coupler tail frame expansion left side;
Fig. 2 is that the embodiment of the invention 1 railway freight car coupler tail frame launches the main schematic diagram of looking;
Fig. 3 is that the embodiment of the invention 1 railway freight car coupler tail frame launches schematic top plan view;
Fig. 4 is that schematic diagram is looked on a left side after the embodiment of the invention 1 railway freight car coupler tail frame simmering and bending;
Fig. 5 is the main schematic diagram of looking after the embodiment of the invention 1 railway freight car coupler tail frame simmering and bending;
Fig. 6 is a schematic top plan view after the embodiment of the invention 1 railway freight car coupler tail frame simmering and bending;
Fig. 7 is that schematic diagram is looked on a left side behind the embodiment of the invention 1 railway freight car coupler tail frame assembly welding;
Fig. 8 is the main schematic diagram of looking behind the embodiment of the invention 1 railway freight car coupler tail frame assembly welding;
Fig. 9 is a schematic top plan view behind the embodiment of the invention 1 railway freight car coupler tail frame assembly welding.
In the drawings,
The 1st, workpiece, the 2nd, weld seam.
The specific embodiment:
Embodiment 1:
See Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8 and Fig. 9.
A kind of large circle-shaped thin wall structure parts, railway freight car coupler tail frame part, this accessory size are 932.5 * 291 * 260mm, the hollow 740.5 * 235mm that is of a size of, the thickness of wall is 28mm, the height of rib is 260mm, adopts the forge welding technological method of the said large circle-shaped thin wall structure parts of the present invention to be made the first step: to forge base, forge according to difference size on the product, heating-up temperature≤1200 ℃, final forging temperature 〉=800 ℃, shaping equipment adopts 1.5t electricity liquid hammer; Second step: die-forging forming, heating-up temperature≤1200 ℃, final forging temperature 〉=800 ℃, accurate base total projection area 2932cm
2, size 2400mm before and after the work top, equipment adopts the 4000t fly press, 3 strikes; The 3rd step: the simmering and bending moulding, adopt particular manufacturing craft to carry out simmering and bending; The 4th step: assembly welding, carry out 300-350 ℃ of preheating before the welding, adopt weld mold, the argon-rich mixed gas weldering will be carried out 300-350 ℃ of insulation and handle after the welding; The surface, welding position is through magnetic powder inspection, and is inner through the requirement of the satisfied regulation of ultrasonic flaw detection grade; The 5th step: modified heat treatment, heating furnace adopts the heat treatment electric furnace, heating furnace is equipped with thermometric, temperature-controlling system, in the burner hearth temperature difference be no more than ± 5 ℃, recording process procedure parameter automatically, tank is furnished with temperature measuring equipment, 900 ℃ ± 10 ℃ of heat-treatment quenching temperature, temperature retention time 150-180min, 580 ℃ ± 20 ℃ of temperatures, temperature retention time 180-210min quenches and temper medium is water.
Be the service check situation of railway freight car coupler tail frame part that the forge welding technological method of the said large circle-shaped thin wall structure parts of the present invention is made below, by being taken a sample in coupon, body, welding position, make mechanical test by cubic rolling stock Co., Ltd, make scrag test by Ministry of Railways product quality supervision and inspection center, do dynamic tear test by the 725th research institute of China Shipbuilding Industry Corporation, the result is as follows:
| Sequence number | Performance indications | The test block test value | The body test value | The welding test value | Standard value |
| 1 | Yield strength (MPa) | 750 | 730 | 710 | 〉=690 weld seams 〉=552 |
| 2 | Tensile strength (MPa) | 865 | 855 | 820 | 〉=850 weld seams 〉=680 |
| 3 | Elongation after fracture % | 22 | 23 | 18 | ≥14 |
| 4 | Contraction percentage of area Z% | 64 | 65 | 54 | ≥30 |
| 5 | Ballistic work (40 ℃) | 146 162 158 | 136 148 162 | 58 50 70 | ≥27 |
| 6 | Dynamically tear Ak (J) for-56 ℃ | 600 360 300 | |||
| 7 | Maximum permanent deformation (mm) | 0.04 | 0.8 | ||
| 8 | Least limit load (KN) | 4005 (not fractures) | 4005 | ||
| 9 | Grain size | 7 | ≥6 | ||
| 10 | Metallographic structure | Tempered sorbite | Do not allow to exist martensite and Widmannstatten structure | ||
Adopt the railway freight car coupler tail frame part of the forge welding technological method production of a kind of large circle-shaped thin wall structure parts of said the present invention, through detecting, the mechanical performance of its body and welding position, metallographic structure and grain size all satisfy the requirement of forged steel pintle frame technical conditions.
The said parts of present embodiment, if adopt whole die forging, the heavy 330kg of blanking, and adopt process of the present invention, the heavy 140kg of blanking, can economical with materials, and the unnecessary material of inner cavity of component, conventional equipment is not easy processing, the head cavity can't be processed, the present invention then need not processing, and efficiency improves more than 100%, reduces manufacturing cost greatly.
Claims (2)
1, the forge welding technological method of large circle-shaped thin wall structure parts is characterized in that it comprises the following steps:
The first step: raw material are forged base;
Second step: the workpiece that will forge into base carries out die-forging forming;
The 3rd step: carry out the simmering and bending moulding, adopt mould to carry out simmering and bending;
The 4th step: carry out assembly welding, carry out preheating before the welding, adopt weld mold, mixed gas arc welding is incubated processing after the welding;
The 5th step: carry out modified heat treatment.
2, the product of the forge welding technological method of large circle-shaped thin wall structure parts production is characterized in that said product is to produce according to the forge welding technological method of the described large circle-shaped thin wall structure parts of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610146292 CN100999052A (en) | 2006-12-22 | 2006-12-22 | Forge welding technological method for large circle-shaped thin wall structure parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610146292 CN100999052A (en) | 2006-12-22 | 2006-12-22 | Forge welding technological method for large circle-shaped thin wall structure parts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN100999052A true CN100999052A (en) | 2007-07-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610146292 Pending CN100999052A (en) | 2006-12-22 | 2006-12-22 | Forge welding technological method for large circle-shaped thin wall structure parts |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101352785B (en) * | 2007-07-23 | 2010-05-26 | 上海重型机器厂有限公司 | Method for welding pressing sleeve of large-sized hydraulic press |
| CN114473370A (en) * | 2021-12-15 | 2022-05-13 | 西安航天动力机械有限公司 | Preparation method of stainless steel thin-wall cylinder |
-
2006
- 2006-12-22 CN CN 200610146292 patent/CN100999052A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101352785B (en) * | 2007-07-23 | 2010-05-26 | 上海重型机器厂有限公司 | Method for welding pressing sleeve of large-sized hydraulic press |
| CN114473370A (en) * | 2021-12-15 | 2022-05-13 | 西安航天动力机械有限公司 | Preparation method of stainless steel thin-wall cylinder |
| CN114473370B (en) * | 2021-12-15 | 2023-06-09 | 西安航天动力机械有限公司 | Preparation method of stainless steel thin-wall cylinder |
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