1. A forming method of a wind power blade bonding angle die is characterized by comprising the following steps: the preparation method comprises the following preparation steps:

designing and manufacturing a female die with a bonding angle replacing wood; cutting a profile of a section of a die blade profile, simulating and calculating the thickness of a layer of a bonding angle area and a reserved bonding gap according to structural requirements, designing the profile of the bonding angle, generating a three-dimensional model of a female die of a bonding angle die according to the profile of the blade die, reasonably segmenting, and inputting into a CNC (computerized numerical control) machining center;

step two, manufacturing a glass fiber reinforced plastic flexible male mold shell; duplicating the glass fiber reinforced plastic flexible male die shell by using the female die 3 of the bonding angle die;

step three, manufacturing a glass fiber reinforced plastic male die; fixing one end of an adjusting device on a glass fiber reinforced plastic flexible male die shell, welding the other end of the adjusting device with a male die steel frame, and forming a glass fiber reinforced plastic male die by the male die steel frame, the adjusting device and the glass fiber reinforced plastic flexible male die shell;

step four, manufacturing a bonding angle die; the manufactured glass fiber reinforced plastic male die is utilized, the shape of the glass fiber reinforced plastic flexible male die shell is adjusted through the adjusting device according to the structural change of the blade profile and the condition of the bonding gap, and the vacuum infusion molding technology can be continuously used for preparing the bonding angle die on the adjusted glass fiber reinforced plastic flexible male die shell.

2. The molding method of the wind power blade bonding angle mold as claimed in claim 1, wherein: the method for manufacturing the glass fiber reinforced plastic flexible male mold shell in the second step comprises the following steps: laying a glass fiber cloth layer with a certain thickness on the female die of the bonding angle die, and heating and curing the glass fiber cloth layer until the tg value is more than 80 ℃ by adopting a vacuum infusion technology.

3. The molding method of the wind power blade bonding angle mold as claimed in claim 1, wherein: the adjusting device comprises a plurality of adjusting components, and each adjusting component comprises a connecting bolt I, a knob and a connecting bolt II; connecting bolt I, knob and connecting bolt II from the top down set gradually, and connecting bolt I's one end and knob threaded connection, connecting bolt I's the other end links to each other with the formpiston steelframe, and connecting bolt II's one end and knob threaded connection, connecting bolt II's the other end and the flexible formpiston shell of glass steel link to each other.

4. The molding method of the wind power blade bonding angle mold as claimed in claim 3, wherein: the knob is the connecting piece that upper and lower both ends all were provided with the screw thread mouth, and connecting bolt I links to each other with the screw thread mouth of knob upper end, and connecting bolt II links to each other with the screw thread mouth of knob lower extreme.

Background

The manufacture of large wind turbine blades generally involves first forming two halves of the blade separately: the windward side and the leeward side, and then the two half sheets are bonded together through the front and rear edge bonding angles and other bonding components. Due to performance requirements, the bonding clearance of the front and rear edge bonding angles needs to be controlled within 4 +/-3 mm, which brings great difficulty to the design of the bonding angle die. The conventional design and manufacturing method of the conventional bonding angle die comprises the following steps: the method comprises the steps of calculating the layer laying thickness of a bonding angle area through intercepting the blade appearance, simulating and calculating, reserving a bonding gap, calculating the contour appearance of a bonding angle and generating a three-dimensional model, carrying out CNC machining on a male die by using a substitute wood, turning a bonding angle female die, producing a front edge bonding angle and a rear edge bonding angle by using the female die, testing the pressure gap, and adjusting the bonding angle die according to the gap. The disadvantages of using this method are: firstly, the utilization rate of a bonding angle male die is too low, and the bonding angle male die can only be used for producing blades of the type and is usually put into one step; when the blade structure is changed, the bonding angle male die can not be used any more; and thirdly, when the gap is not proper, the bonding angle male die cannot be adjusted, so that the female die is difficult to adjust and the data is inaccurate.

Disclosure of Invention

Aiming at the conditions that the wind power blade bonding angle mold is low in one-time design accuracy, large in gap fluctuation, long in mold adjustment period and high in difficulty, the invention provides the forming method of the wind power blade bonding angle mold, which can be used for manufacturing the bonding angle mold male mold with adjustable appearance so as to meet the bonding angle requirements of different models and shapes and achieve the universal purpose.

The technical scheme adopted by the invention for solving the technical problems is as follows: a molding method of a wind power blade bonding angle mold comprises the following preparation steps:

designing and manufacturing a female die with a bonding angle replacing wood; cutting a profile of a section of a die blade profile, simulating and calculating the thickness of a layer of a bonding angle area and a reserved bonding gap according to structural requirements, designing the profile of the bonding angle, generating a three-dimensional model of a female die of a bonding angle die according to the profile of the blade die, reasonably segmenting, and inputting into a CNC (computerized numerical control) machining center;

step two, manufacturing a glass fiber reinforced plastic flexible male mold shell; duplicating the glass fiber reinforced plastic flexible male die shell by using the female die 3 of the bonding angle die;

step three, manufacturing a glass fiber reinforced plastic male die; fixing one end of an adjusting device on a glass fiber reinforced plastic flexible male die shell, welding the other end of the adjusting device with a male die steel frame, and forming a glass fiber reinforced plastic male die by the male die steel frame, the adjusting device and the glass fiber reinforced plastic flexible male die shell;

step four, manufacturing a bonding angle die; the manufactured glass fiber reinforced plastic male die is utilized, the shape of the glass fiber reinforced plastic flexible male die shell is adjusted through the adjusting device according to the structural change of the blade profile and the condition of the bonding gap, and the vacuum infusion molding technology can be continuously used for preparing the bonding angle die on the adjusted glass fiber reinforced plastic flexible male die shell.

Further, the method for manufacturing the glass fiber reinforced plastic flexible male mold shell in the second step comprises the following steps: laying a glass fiber cloth layer with a certain thickness on the female die of the bonding angle die, and heating and curing the glass fiber cloth layer until the tg value is more than 80 ℃ by adopting a vacuum infusion technology.

Furthermore, the adjusting device comprises a plurality of adjusting components, and each adjusting component comprises a connecting bolt I, a knob and a connecting bolt II; connecting bolt I, knob and connecting bolt II from the top down set gradually, and connecting bolt I's one end and knob threaded connection, connecting bolt I's the other end links to each other with the formpiston steelframe, and connecting bolt II's one end and knob threaded connection, connecting bolt II's the other end and the flexible formpiston shell of glass steel link to each other.

Further, the knob is a connecting piece with threaded openings formed in the upper end and the lower end, the connecting bolt I is connected with the threaded opening in the upper end of the knob, and the connecting bolt II is connected with the threaded opening in the lower end of the knob.

The beneficial effects of the invention are mainly shown in the following aspects: the invention utilizes the larger similarity of the blade shapes of the same airfoil family, can achieve the purpose of universal use of the blade-shaped bonding angle male die by manufacturing the flexible-shape-adjustable bonding angle male die, reduces the cost investment, and simultaneously has better weather resistance and strength compared with a wood-replacing male die because the glass fiber reinforced plastic male die has longer service life.

Drawings

FIG. 1 is a schematic structural view of a lobed cross-sectional profile and a bond angle profile of the present invention;

FIG. 2 is a schematic structural view of a female mold of the bonding angle mold of the present invention;

FIG. 3 is a schematic representation of the construction of the adjustable bond angle male mold of the present invention;

FIG. 4 is an enlarged schematic view of the adjustment device of FIG. 3;

FIG. 5 is a schematic diagram of a bonding angle mold according to the present invention;

the labels in the figure are: 1. the mold comprises a leaf-shaped section contour, 2 a bonding angle contour, 3 a bonding angle mold female mold, 4 a glass fiber reinforced plastic flexible male mold shell, 5 a male mold steel frame, 6 an adjusting device, 7 a bonding angle mold, 8 a connecting bolt I, 9, a knob, 10 and a connecting bolt II.

Detailed Description

The embodiments of the present invention are described in detail with reference to the accompanying drawings, and the embodiments and specific operations of the embodiments are provided on the premise of the technical solution of the present invention, but the scope of the present invention is not limited to the following embodiments.

According to the attached drawings, the forming method of the wind power blade bonding angle die comprises the following preparation steps:

designing and manufacturing a female die with a bonding angle replacing wood; cutting a profile 1 of a section of a die blade profile, simulating and calculating the thickness of a layer of a bonding angle area and a reserved bonding gap according to structural requirements, designing a bonding angle profile 2, generating a three-dimensional model of a female die 3 of a bonding angle die according to the profile of the blade die, reasonably segmenting, inputting into a CNC (computerized numerical control) machining center, preparing foam and wood substitute with a certain volume in advance, and using the foam and wood substitute for milling and grinding the female die 3 of the bonding angle die;

step two, manufacturing a glass fiber reinforced plastic flexible male mold shell; duplicating a glass fiber reinforced plastic flexible male mold shell 4 by using a female mold 3 of the bonding angle mold; paving a glass fiber cloth layer with a certain thickness on the female die 3 of the bonding angle die, and heating and curing the glass fiber cloth layer until the tg value is greater than 80 ℃ by adopting a vacuum infusion technology;

step three, manufacturing a glass fiber reinforced plastic male die; one end of an adjusting device 6 is fixed on a glass fiber reinforced plastic flexible male mold shell 4, the other end of the adjusting device 6 is welded with a male mold steel frame 5, and the male mold steel frame 5, the adjusting device 6 and the glass fiber reinforced plastic flexible male mold shell 4 jointly form a glass fiber reinforced plastic male mold; the adjusting device 6 is mainly designed by utilizing the advancing and retreating principle of a bolt, a connecting bolt I8 of the adjusting device 6 is manually pasted and fixed on the cured glass fiber reinforced plastic flexible male die shell 4, a connecting bolt II 10 at the other end is welded with a male die steel frame 5, a knob 9 is a connecting piece with threaded openings arranged at the upper end and the lower end, the connecting bolt I8 is connected with the threaded opening at the upper end of the knob 9, and the connecting bolt II 10 is connected with the threaded opening at the lower end of the knob 9; one of the upper and lower threaded openings of the knob 9 is a positive thread, the other is a negative thread, and the distance between the connecting bolt II 10 and the connecting bolt I8 can be adjusted by rotating the knob 9; the adjusting devices 6 are combined for use, namely the function of adjusting the shape of the glass fiber reinforced plastic flexible male die shell 4 through the knob 9 can be realized, and then the glass fiber reinforced plastic male die is integrally demoulded;

step four, manufacturing a bonding angle die; the manufactured glass fiber reinforced plastic male die is utilized, according to the structural change of the blade profile and the actual condition of the bonding gap, the distance between the connecting bolt II 10 and the connecting bolt I8 is adjusted through rotating the knob 9, the shape of the glass fiber reinforced plastic flexible male die shell 4 is further adjusted, and the vacuum infusion molding technology can be continuously used for preparing the bonding angle die 7 on the adjusted glass fiber reinforced plastic flexible male die shell 4.

The adjusting device 6 comprises a plurality of adjusting components, and each adjusting component comprises a connecting bolt I8, a knob 9 and a connecting bolt II 10; connecting bolt I8, knob 9 and connecting bolt II 10 from the top down set gradually, and connecting bolt I8's one end and knob 9 threaded connection, connecting bolt I8's the other end links to each other with formpiston steelframe 5, and connecting bolt II 10's one end and knob 9 threaded connection, connecting bolt II 10's the other end links to each other with glass steel flexible formpiston shell 4.

It is further noted that relational terms such as i, ii, and iii may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.