CN103480705A - Method for forming steel blade in one-time pressing mode - Google Patents
Method for forming steel blade in one-time pressing mode Download PDFInfo
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- CN103480705A CN103480705A CN201310473609.6A CN201310473609A CN103480705A CN 103480705 A CN103480705 A CN 103480705A CN 201310473609 A CN201310473609 A CN 201310473609A CN 103480705 A CN103480705 A CN 103480705A
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Abstract
The invention provides a method for forming a steel blade in a one-time pressing mode. The method for forming the steel blade in the one-time pressing mode solves the problem that an existing blade consumes time and labor, cracks easily and affects operation efficiency when being formed in a welding mode. The method for forming the steel blade in the one-time pressing mode comprises the steps that (a) a steel plate is discharged and a positioning datum line is drawn on the steel plate; (b) the central line of a bent lower mould and the positioning datum line of the steel plate are aligned, an upper mould is bent and pressed downwards, and the steel plate is prebent to 17-23 degrees; (c) the bent steel plate is heated; (d) the heated bent steel plate is put into a forming lower mould, and an inner core is put into the bent steel plate; (e) a front forming upper mould and a rear forming upper mould are pressed downwards together until the blade is formed; (f) the front forming upper mould and the rear forming upper mould are moved upwards by a certain amount of displacement, together pressed rear ends of the blade are separated due to elasticity, and the inner core is taken out; (g) the front forming upper mould and the rear forming upper mould are downwards pressed again, and then after the rear forming upper mould is rotated upwards, the rear ends of the blade are welded to obtained the formed blade. The method for forming the steel blade in the one-time pressing mode has the advantages of being low in cost, simple in structure and convenient to machine.
Description
Technical field
The present invention relates to the forming method of propeller fan building block, be specially briquetting process of a kind of steel blade.
Background technology
Impeller is the parts of axial flow main fan most critical, and blade is most crucial part, and the degree-of-difficulty factor maximum of its design, processing, require the highest.Domestic axial flow main fan blade generally adopts casting and two kinds of processing modes of welding fabrication, in actual production process, can select different molding modes to the requirement of blade material according to each mine coal seam gas.
At present, the traditional welding fabrication blade of domestic ventilation blower factory has than casting that processing technology is relatively simple, yield rate is high, defect is few, low cost and other advantages, thereby most producer all adopts the processing technology manufacture steel blade of welding blade and the moulding of sharf rivet welding.After ventilation blower factory steel production process of blade is all compressing separately by blade windward side and lee face again together with solder bond, in the mine use procedure, find due to the coal gas layer in the friction of impurity particle object height speed, at the solder bond place, because welding quality causes the blade cracking phenomena, often occur.
Summary of the invention
The present invention adopts welding fabrication to exist to waste time and energy in order to solve existing blade, easy to crack and affect the problem of operating efficiency, provide a kind of steel blade a briquetting process.
The present invention adopts following technical scheme to realize: briquetting process of steel blade, adopt following steps: a, by steel plate according to the ventilating vane model blanking of design and pull position baseline; B, the center line of crooked counterdie is alignd and fixes with the position baseline of steel plate, crooked patrix presses down, and carries out at normal temperatures pre-bending to steel plate bending to the 17-23 degree; C, in temperature, in controlled resistance furnace, curved plates is heated, temperature range is controlled at 650～850 ℃; D, the curved plates after heating is put into to the moulding counterdie, and inner core is put into to curved plates, the lower end of moulding counterdie is fixed with the counterdie die holder, and the front end of moulding counterdie is fixed with alignment pin; E, the anterior shaping upper arranged that will be hinged press to blade forming together with the shaping upper of rear portion; F, will on anterior shaping upper and rear portion shaping upper, move certain displacement, coarctate blade rear end separates because of strain, takes out inner core; G, again anterior shaping upper and rear portion shaping upper are pressed down, after subsequently the rear portion shaping upper being rotated up, the blade rear end is welded and obtained the moulding blade.
The steel blade is compressing technique once, adopts blade to be pre-bent to mould, the blade forming mould is used in conjunction with, overcome existing blade adopt welding fabrication to exist to waste time and energy, easy to crack and affect the problem of operating efficiency.
Temperature range to the curved plates heating is controlled at 750 ℃, is to draw by a large amount of tests, can guarantee being badly deformed of curved plates, can guarantee again the quality requirement of curved plates.
Technique of the present invention is rationally reliable, the theory shaped wire of the design of mould based on blade, eliminated resilience after twice thermal compression welding, the aerofoil profile of the blade blank obtained meets the theory shaped wire of design fully, processing technology and cycle have effectively been shortened, improve labour intensity and efficiency, there are cost characteristics low, simple in structure, easy to process.
The accompanying drawing explanation
The structural representation that Fig. 1 is bending mould in the present invention;
The structural representation that Fig. 2 is mould in the present invention.
In figure: the crooked counterdie of 1-, the crooked patrix of 2-, 3-curved plates, 4-moulding counterdie, 5-inner core, 6-counterdie die holder, 7-alignment pin, the anterior shaping upper of 8-, 9-rear portion shaping upper.
The specific embodiment
Briquetting process of steel blade, adopt following steps: a, by steel plate according to the ventilating vane model blanking of design and pull position baseline; B, the center line of crooked counterdie 1 is alignd and fixes with the position baseline of steel plate, crooked patrix 2 presses down, and carries out at normal temperatures pre-bending to steel plate bending to the 17-23 degree; C, in temperature, in controlled resistance furnace, curved plates 3 is heated, temperature range is controlled at 650～850 ℃; D, the curved plates 3 after heating is put into to moulding counterdie 4, and inner core 5 is put into to curved plates 3, the lower end of moulding counterdie 4 is fixed with counterdie die holder 6, and the front end of moulding counterdie 4 is fixed with alignment pin 7; E, the anterior shaping upper 8 arranged that will be hinged press to blade forming together with rear portion shaping upper 9; F, will on anterior shaping upper 8 and rear portion shaping upper 9, move certain displacement, coarctate blade rear end separates because of strain, takes out inner core 5; G, again anterior shaping upper 8 and rear portion shaping upper 9 are pressed down, after subsequently rear portion shaping upper 9 being rotated up, the blade rear end is welded and obtained the moulding blade.
Temperature range to curved plates 3 heating is controlled at 750 ℃.
In specific implementation process, the heating-up temperature scope control is at 650～850 ℃, because steel is when being heated to more than 800 ℃, degree of oxidation sharply increases, and the simultaneous oxidation skin can obviously occur and increase, affect leaf quality.
Claims (2)
1. briquetting process of a steel blade is characterized in that: adopt following steps: a, by steel plate according to the ventilating vane model blanking of design and pull position baseline; B, the center line of crooked counterdie (1) is alignd and fixes with the position baseline of steel plate, crooked patrix (2) presses down, and carries out at normal temperatures pre-bending to steel plate bending to the 17-23 degree; C, in temperature, in controlled resistance furnace, curved plates (3) is heated, temperature range is controlled at 650～850 ℃; D, the curved plates (3) after heating is put into to moulding counterdie (4), and inner core (5) is put into to curved plates (3), the lower end of moulding counterdie (4) is fixed with counterdie die holder (6), and the front end of moulding counterdie (4) is fixed with alignment pin (7); E, anterior shaping upper (8) and the rear portion shaping upper (9) arranged that will be hinged press to blade forming together; F, will on anterior shaping upper (8) and rear portion shaping upper (9), move certain displacement, coarctate blade rear end separates because of strain, takes out inner core (5); G, again anterior shaping upper (8) and rear portion shaping upper (9) are pressed down, after subsequently rear portion shaping upper (9) being rotated up, the blade rear end is welded and obtained the moulding blade.
2. briquetting process of steel blade according to claim 1 is characterized in that: the temperature range to curved plates (3) heating is controlled at 750 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310473609.6A CN103480705B (en) | 2013-10-12 | 2013-10-12 | Method for forming steel blade in one-time pressing mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310473609.6A CN103480705B (en) | 2013-10-12 | 2013-10-12 | Method for forming steel blade in one-time pressing mode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103480705A true CN103480705A (en) | 2014-01-01 |
| CN103480705B CN103480705B (en) | 2015-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310473609.6A Expired - Fee Related CN103480705B (en) | 2013-10-12 | 2013-10-12 | Method for forming steel blade in one-time pressing mode |
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| CN (1) | CN103480705B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106513479A (en) * | 2016-11-04 | 2017-03-22 | 贵州航飞精密制造有限公司 | Bending machining technique method for turbine blade |
| CN110076221A (en) * | 2019-05-16 | 2019-08-02 | 中建钢构武汉有限公司 | A kind of U-shaped board forming method and U-shaped board installation method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19959598A1 (en) * | 1999-12-10 | 2001-06-13 | Rolls Royce Deutschland | Method for manufacturing a blade of a turbomachine |
| CN1644304A (en) * | 2004-03-08 | 2005-07-27 | 斯奈克玛马达公司 | Method for producing fan impeller with strengthened front or rear fringes |
| US20110073237A1 (en) * | 2009-09-29 | 2011-03-31 | Vestas Wind Systems A/S | Mould for manufacturing of wind turbine blades |
| CN102837167A (en) * | 2011-06-22 | 2012-12-26 | 湖北省风机厂有限公司 | Preparation process of blade pressing die of stationary blade adjustable axial flow fan |
| CN202762902U (en) * | 2012-09-10 | 2013-03-06 | 鞍山钢峰风机有限责任公司 | Molding device for blade of axial flow fan |
-
2013
- 2013-10-12 CN CN201310473609.6A patent/CN103480705B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19959598A1 (en) * | 1999-12-10 | 2001-06-13 | Rolls Royce Deutschland | Method for manufacturing a blade of a turbomachine |
| CN1644304A (en) * | 2004-03-08 | 2005-07-27 | 斯奈克玛马达公司 | Method for producing fan impeller with strengthened front or rear fringes |
| US20110073237A1 (en) * | 2009-09-29 | 2011-03-31 | Vestas Wind Systems A/S | Mould for manufacturing of wind turbine blades |
| CN102837167A (en) * | 2011-06-22 | 2012-12-26 | 湖北省风机厂有限公司 | Preparation process of blade pressing die of stationary blade adjustable axial flow fan |
| CN202762902U (en) * | 2012-09-10 | 2013-03-06 | 鞍山钢峰风机有限责任公司 | Molding device for blade of axial flow fan |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106513479A (en) * | 2016-11-04 | 2017-03-22 | 贵州航飞精密制造有限公司 | Bending machining technique method for turbine blade |
| CN106513479B (en) * | 2016-11-04 | 2018-08-14 | 贵州航飞精密制造有限公司 | A kind of bending machining process of turbo blade |
| CN110076221A (en) * | 2019-05-16 | 2019-08-02 | 中建钢构武汉有限公司 | A kind of U-shaped board forming method and U-shaped board installation method |
| CN110076221B (en) * | 2019-05-16 | 2021-06-18 | 中建钢构武汉有限公司 | U-shaped plate forming method and U-shaped plate mounting method |
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| Publication number | Publication date |
|---|---|
| CN103480705B (en) | 2015-06-03 |
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