CN103480705B - 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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- CN103480705B CN103480705B CN201310473609.6A CN201310473609A CN103480705B CN 103480705 B CN103480705 B CN 103480705B CN 201310473609 A CN201310473609 A CN 201310473609A CN 103480705 B CN103480705 B CN 103480705B
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- blade
- steel plate
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- upper mould
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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 a kind of steel blade briquetting process.
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 of its design, processing is maximum, requires the highest.Domestic axial flow main fan blade generally adopts casting and welding fabrication two kinds of processing modes, in actual production process, can select different molding modes according to each requirement of mine coal seam gas to blade material.
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, and thus most producer all adopts welding blade and the shaping processing technology of sharf rivet welding to manufacture steel blade.After ventilation blower factory steel production process of blade is all compressing separately with lee face by blade windward side again together with solder bond, find in mine use procedure due to the impurity particle thing high-speed friction in coal gas layer, at solder bond place because welding quality causes blade cracking phenomena often to occur.
Summary of the invention
The present invention adopts welding fabrication to exist to waste time and energy to solve existing blade, easy to crack and affect the problem of operating efficiency, provide a kind of steel blade briquetting process.
The present invention adopts following technical scheme to realize: steel blade briquetting process, adopts following steps: a, steel plate is pulled position baseline according to the ventilating vane model blanking of design; B, being alignd with the position baseline of steel plate by the center line of bending counterdie fixes, and bending patrix presses down, and carries out pre-bending at normal temperatures to steel plate bending to 17-23 degree; C, heat curved plates in the resistance furnace of temperature-controllable, temperature range controls at 650 ~ 850 DEG C; D, the curved plates after heating is put into shaping counterdie, and inner core is put into curved plates, the lower end of shaping counterdie is fixed with counterdie die holder, and the front end of shaping counterdie is fixed with alignment pin; E, by be hinged arrange anterior shaping upper press to blade forming together with the shaping upper of rear portion; F, move certain displacement by anterior shaping upper and rear portion shaping upper, coarctate blade rear end is separated because of elastic deformation, takes out inner core; G, again anterior shaping upper and rear portion shaping upper to be pressed down, after subsequently rear portion shaping upper being rotated up, welding is carried out to blade rear end and obtains formed blades.
Steel blade is compressing technique once, adopt blade be pre-bent to mould, blade forming mould with the use of, overcome existing blade adopt welding fabrication to exist to waste time and energy, easy to crack and affect the problem of operating efficiency.
Control at 750 DEG C to the temperature range of curved plates heating, be drawn by a large amount of tests, being badly deformed of curved plates can be ensured, the quality requirement of curved plates can be ensured again.
Present invention process is rationally reliable, the design of mould is based on the theory shaped wire of blade, resilience is eliminated after twice thermal compression welding, the aerofoil profile of the blade blank obtained meets the theory shaped wire of design completely, effectively shorten processing technology and cycle, improve labour intensity and efficiency, have the advantages that cost is low, structure is simple, easy to process.
Accompanying drawing explanation
Fig. 1 is the structural representation of bending mould in the present invention;
Fig. 2 is the structural representation of mould in the present invention.
In figure: 1-bends counterdie, 2-bends patrix, 3-curved plates, the shaping counterdie of 4-, 5-inner core, 6-counterdie die holder, 7-alignment pin, the anterior shaping upper of 8-, 9-rear portion shaping upper.
Detailed description of the invention
Steel blade briquetting process, adopt following steps: a, by steel plate according to design the blanking of ventilating vane model and pull position baseline; B, being alignd with the position baseline of steel plate by the bending center line of counterdie 1 fixes, and bending patrix 2 presses down, and carries out pre-bending at normal temperatures to steel plate bending to 17-23 degree; C, heat curved plates 3 in the resistance furnace of temperature-controllable, temperature range controls at 650 ~ 850 DEG C; D, the curved plates 3 after heating is put into shaping counterdie 4, and inner core 5 is put into curved plates 3, the lower end of shaping counterdie 4 is fixed with counterdie die holder 6, and the front end of shaping counterdie 4 is fixed with alignment pin 7; E, by be hinged arrange anterior shaping upper 8 press to blade forming together with rear portion shaping upper 9; F, move certain displacement by anterior shaping upper 8 and rear portion shaping upper 9, coarctate blade rear end is separated because of elastic deformation, takes out inner core 5; G, again anterior shaping upper 8 and rear portion shaping upper 9 to be pressed down, after subsequently rear portion shaping upper 9 being rotated up, welding is carried out to blade rear end and obtains formed blades.
The temperature range that curved plates 3 heats is controlled at 750 DEG C.
In specific implementation process, heating temperature range controls at 650 ~ 850 DEG C, because steel is when being heated to more than 800 DEG C, degree of oxidation sharply increases, and simultaneous oxidation skin can obviously occur and increase, and affects leaf quality.
Claims (2)
1. steel blade briquetting process, is characterized in that: adopt following steps: a, by steel plate according to design the blanking of ventilating vane model and pull position baseline; B, being alignd with the position baseline of steel plate by the center line bending counterdie (1) fixes, and bending patrix (2) presses down, and carries out pre-bending at normal temperatures to steel plate bending to 17-23 degree; C, heat curved plates (3) in the resistance furnace of temperature-controllable, temperature range controls at 650 ~ 850 DEG C; D, the curved plates (3) after heating is put into shaping counterdie (4), and inner core (5) is put into curved plates (3), the lower end of shaping counterdie (4) is fixed with counterdie die holder (6), and the front end of shaping counterdie (4) is fixed with alignment pin (7); E, the anterior shaping upper (8) arranged being hinged and rear portion shaping upper (9) press to blade forming together; F, move certain displacement by anterior shaping upper (8) and rear portion shaping upper (9), coarctate blade rear end is separated because of elastic deformation, takes out inner core (5); G, again anterior shaping upper (8) and rear portion shaping upper (9) to be pressed down, after subsequently rear portion shaping upper (9) being rotated up, welding is carried out to blade rear end and obtains formed blades.
2. steel blade according to claim 1 briquetting process, is characterized in that: control at 750 DEG C the temperature that curved plates (3) heats.
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 CN103480705A (en) | 2014-01-01 |
| CN103480705B true CN103480705B (en) | 2015-06-03 |
Family
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Family Applications (1)
| 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 |
Country Status (1)
| Country | Link |
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| CN (1) | CN103480705B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
Citations (4)
| 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 |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2584939T3 (en) * | 2009-09-29 | 2016-09-30 | Vestas Wind Systems A/S | Mold for the manufacture of wind turbine blades |
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2013
- 2013-10-12 CN CN201310473609.6A patent/CN103480705B/en not_active Expired - Fee Related
Patent Citations (4)
| 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 |
| 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 |
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|---|---|
| CN103480705A (en) | 2014-01-01 |
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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20150603 Termination date: 20191012 |