A processing method of a thin-wall blade with a switching shaft sleeve

Abstract

The application discloses a processing method of a thin-wall blade with a switching shaft sleeve, which comprises the following steps: selecting a rectangular alloy block with the length, width and height all being larger than those of a whole part as a part blank, and processing fixing holes and positioning pin holes on the part blank; clamping the part blank to a horizontal tooling bottom plate I on a machining center workbench, and respectively rough processing 3D surfaces of front and back surfaces of the thin-wall blade; artificially aging heat treating the part blank; then clamping the part blank to the horizontal tooling bottom plate I, and respectively finishing surface contours of the front and back surfaces of the thin-wall blade; installing the part blank to a vertical tooling plate on the machining center workbench, and completing drilling of two switching shaft sleeves; and finally positioning the part blank on a wire cutting machine tool workbench, and cutting the thin-wall blade from the part blank along a wire cutting circle of an outer contour of the thin-wall blade. The processing and clamping process of the application is simple, the production efficiency can be effectively improved, and the product qualified rate can be ensured.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing, and in particular to a processing method of a thin-walled blade with an adapter sleeve. Background Art

[0002] like Figure 1 、 2 The thin-walled blade with an adapter sleeve shown is an integrated part made from aviation aluminum alloy. Both surfaces of the blade need to be processed. The blade is relatively thin, with the thinnest part being only 0.2 mm thick. Two adapter sleeves are also connected to one side of the blade. The traditional processing method is to first mill the surface contour of one side of the blade, then fill the machined side with plaster, wait for the plaster to solidify and form an integral structure with the workpiece, and then use the plaster surface as the positioning surface to process the other side of the blade. After that, the two adapter sleeves are drilled separately, and finally the plaster is removed to obtain the completed part. This existing processing method has the following defects: 1. It takes a long time for the plaster to be molded and hardened, and it also takes time to remove the plaster after processing, which can easily affect the production cycle and efficiency; 2. The finished surface of the part is easily corroded when in contact with the plaster, affecting the surface quality and appearance of the part; 3. The plaster will stretch the part during the hardening process, causing the contour and size of the workpiece to change, increasing dimensional errors and reducing the qualified rate of the part. Summary of the Invention

[0003] The purpose of the present invention is to address the defects of the above-mentioned prior art and provide a processing method for thin-walled blades with adapter sleeves. The processing and clamping process is simple, which can effectively improve production efficiency and ensure product qualification rate.

[0004] The technical scheme adopted by the present application to achieve the above object is: a machining method of a thin-wall blade with a switching shaft sleeve, comprising the following steps: (1) according to the overall contour size of the required thin-wall blade, a rectangular alloy block with a length, width and height greater than the overall length, width and height of the part is selected as a part blank, and a fixed hole and a positioning pin hole are machined at the edge positions on both sides of the part blank in the longitudinal direction; (2) the part blank is clamped on a horizontal tooling bottom plate I on the machining center workbench, the machining center is controlled to mill the upper surface of the part blank to coarsely machine a 3D surface of the thin-wall blade; (3) the part blank is removed from the horizontal tooling bottom plate I, and the part blank is turned over to be installed on the horizontal tooling bottom plate I with the unprocessed bottom surface upward, the machining center is controlled to mill the upper surface of the part blank to coarsely machine a 3D surface of the thin-wall blade; (4) the part blank is removed from the horizontal tooling bottom plate I, and the part blank is subjected to artificial aging heat treatment; (5) the part blank subjected to artificial aging heat treatment is clamped on the horizontal tooling bottom plate I on the machining center workbench, the machining center is controlled to mill the upper surface of the part blank to finish machining the curved surface contour of the thin-wall blade; (6) the part blank is removed from the horizontal tooling bottom plate I, a row of support columns is installed at the middle position of the horizontal tooling bottom plate I, the part blank is turned over to be installed on the horizontal tooling bottom plate I with the unprocessed bottom surface upward, the support columns are supported on the bottom surface of the part blank, and the machining center is controlled to mill the upper surface of the part blank to finish machining the curved surface contour of the thin-wall blade; (7) the part blank is removed from the horizontal tooling bottom plate I, and the part blank is installed on a vertical positioning plate, the bottom end of the vertical positioning plate is fixed on the machining center workbench, the drill bit is controlled to move to the top surface of the part blank above the switching shaft sleeve, and the drill bit is controlled to drill downward until the switching shaft sleeve on the upper side is penetrated, and the first switching shaft sleeve drilling is completed; (8) the part blank is removed from the vertical positioning plate, the part blank is rotated by 180 degrees so that the unprocessed switching shaft sleeve on the part blank is located on the upper side, the part blank is fixed on the vertical positioning plate, the bottom end of the vertical positioning plate is fixed on the machining center workbench, the drill bit is controlled to move to the top surface of the part blank above the switching shaft sleeve, and the drill bit is controlled to drill downward until the switching shaft sleeve on the upper side is penetrated, and the second switching shaft sleeve drilling is completed; (9) the part blank is positioned on the workbench of a wire cutting machine tool, and the thin-wall blade is cut from the part blank along the outer contour of the thin-wall blade for one circle.

[0005] The further technical scheme of the present application is that before the step (9), the part blank needs to be clamped and positioned on a middle hollow horizontal tooling bottom plate II, and then the horizontal tooling bottom plate II is positioned on the workbench of the wire cutting machine tool, and the middle part of the horizontal tooling bottom plate II is provided with a hollow through groove with the same contour as the outer contour of the thin-wall blade.

[0006] The further technical scheme of the present application is that the horizontal tooling bottom plate I, the horizontal tooling bottom plate II and the vertical positioning plate are respectively provided with fixing holes and positioning pin holes, and the positions of the fixing holes and the positioning pin holes on the horizontal tooling bottom plate I, the horizontal tooling bottom plate II and the vertical positioning plate are respectively one-to-one corresponding to the positions of the fixing holes and the positioning pin holes on the part blank.

[0007] The further technical scheme of the present application is that the vertical positioning plate is in L-shaped structure, and the vertical positioning plate comprises a horizontal plate and a vertical plate connected to one end of the horizontal plate, and the fixing holes and the positioning pin holes are respectively arranged at the two side edge positions of the vertical plate.

[0008] The further technical scheme of the present application is that the horizontal tooling bottom plate I and the horizontal tooling bottom plate II are respectively provided with positioning steps at the longitudinal two ends thereof, and the machining center workbench is provided with a pressing block capable of being pressed on the positioning steps and a locking device for locking the pressing block.

[0009] The further technical scheme of the present application is that the horizontal tooling bottom plate I is provided with a row of positioning holes at the middle position thereof, the support column is in mushroom-shaped structure as a whole, the support column comprises a column body arranged in the positioning hole and a support block connected to the top end of the column body, and the top surface of the support block is an arc surface.

[0010] The present application has the following beneficial effects:

[0011] 1. A rectangular alloy block with length, width and height greater than those of the part as a whole is selected as the part blank for machining the thin-wall blade, and the fixing holes and the positioning pin holes are respectively machined at the two sides of the part blank, so that the positioning of the part blank becomes relatively simple, and the part blank can be clamped by only the simple positioning tooling such as the flat positioning plate and the positioning bolt and the positioning pin, thereby achieving simple device, low cost, convenient operation, fast disassembly, simple positioning and disassembly process of the part blank, small vibration of the part blank with large volume, high position accuracy, guaranteed processing quality of the front and back surfaces of the thin-wall blade, and improved production efficiency and guaranteed product qualification rate.

[0012] 2. A row of support columns are installed in the horizontal tooling bottom plate I during the finish machining of the thin-wall blade, the support columns can be supported on the bottom surface of the thin-wall blade, the vibration during the machining process is reduced, the deformation of the part is reduced, and the product qualification rate is effectively guaranteed.

[0013] 3. After the upper and lower side contours of the thin-wall blade are machined, the part blank is positioned on the vertical positioning plate before the blank edge material is cut off, and then the shaft holes of the two adapter shaft sleeves are respectively drilled, the part blank is simply and quickly clamped and positioned, the position accuracy is easily guaranteed, the position accuracy of the machined shaft holes is high, the production efficiency is improved, and the product qualification rate is guaranteed.

[0014] 4. After processing the outline of the part, a horizontal tooling base plate II with a hollow center is used to position the part blank on the workbench of the wire cutting machine. The thin-walled blade is cut from the part blank by cutting the wire along the outer contour of the thin-walled blade. The positioning and clamping of the part blank is simple and fast, the wire cutting position has high accuracy, and the outer surface of the part does not need to be clamped to complete the processing. The outer contour of the part will not be deformed, and the product qualification rate is high.

[0015] The following further describes a method for processing a thin-walled blade with an adapter sleeve according to the present invention in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of a thin-walled blade with an adapter sleeve;

[0017] Figure 2 yes Figure 1 A schematic diagram of the structure of the other side of the thin-walled blade with the adapter sleeve is shown;

[0018] Figure 3 It is a schematic diagram of the structure of the blank of the part to be processed after the fixing holes and the positioning pin holes are processed;

[0019] Figure 4 It will Figure 3 The schematic diagram of the structure of the part blank is installed on the horizontal tooling base plate I;

[0020] Figure 5 This is a schematic diagram of the structure in which the part blank is mounted on the horizontal tooling base plate I and the thin-walled blade 3D surface is machined;

[0021] Figure 6 This is a schematic diagram of the structure in which the part blank is mounted on the horizontal tooling base plate I in preparation for finishing the thin-walled blade in step (six);

[0022] Figure 7 yes Figure 6 Cross-sectional view along AA direction;

[0023] Figure 8 It is a structural diagram of the part blank installed on the vertical positioning plate;

[0024] Figure 9 This is a schematic diagram of the structure of the part blank removed from the vertical positioning plate after completing step (eight);

[0025] Figure 10 It is a structural diagram of the horizontal tooling base plate II;

[0026] Figure 11 It will Figure 9 The schematic diagram of the structure of the part blank is installed on the horizontal tooling base plate II;

[0027] Explanation of the accompanying numbers: 1-thin-wall blade, 2-adapter sleeve, 3-part blank, 4-fixing hole, 5-locating pin hole, 6-bolt, 7-locating pin, 8-horizontal tooling base plate I, 9-locating step, 10-pressure block, 11-locking device, 12-locating hole, 13-support column, 14-column, 15-support block, 16-vertical positioning plate, 17-vertical plate, 18-horizontal plate, 19-horizontal tooling base plate II, 20-hollow through groove. DETAILED DESCRIPTION

[0028] The present invention provides a method for processing a thin-walled blade with an adapter sleeve, comprising the following steps:

[0029] (1) According to the overall outline size of the thin-walled blade to be processed, a rectangular alloy block with a length, width and height larger than the overall length, width and height of the thin-walled blade is selected as the part blank 3. In this embodiment, the overall size of the part blank 3 is 10 mm larger in length, 30 mm larger in width and 4 mm larger in height than the overall size of the thin-walled blade 1 to be processed. The material of the part blank 3 is aviation aluminum alloy. Figure 3 As shown, fixing holes 4 and locating pin holes 5 are machined on both sides of the part blank 3 in the longitudinal direction (the longitudinal direction refers to the direction in which the long side of the rectangle extends) near the edge. The fixing holes 4 are used to cooperate with fixing bolts 6 to lock the part blank 3, and the locating pin holes 5 are used to cooperate with locating pins 7 to position the part blank 3. In this embodiment, two locating pin holes 5 are provided on one side of the part blank 3 in the longitudinal direction, and three fixing holes 4 are provided on each side of the part blank 3 in the longitudinal direction. The number of fixing holes can be appropriately varied according to the length of the part blank 3, as long as the part blank 3 can be locked.

[0030] (2) Clamp the part blank 3 on the horizontal tooling base plate Ⅰ8 on the workbench of the machining center, as shown in the figure. Figure 4 As shown. The horizontal tooling base plate Ⅰ8 is also provided with fixing holes and positioning pin holes. The positions of the fixing holes and positioning pin holes on the horizontal tooling base plate Ⅰ8 correspond one to one with the positions of the fixing holes and positioning pin holes on the part blank 3. First, insert the positioning pin into the positioning pin hole, and then insert the bolt 6 into the corresponding fixing hole to fix the part blank 3 on the horizontal tooling base plate Ⅰ8. Positioning steps 9 are respectively provided at both ends of the horizontal tooling base plate Ⅰ8 in the longitudinal direction. A pressure block 10 that can be pressed on the positioning step 9 and a locking device 11 for locking the pressure block 10 are provided on the workbench of the machining center. The working table of the machining center is not shown in the figure. The working table of the machining center is an existing structure. The machining center is an existing machining center that can perform CNC milling. The machining center is controlled to perform milling on the upper surface of the part blank 3 to roughly machine the front 3D surface of the thin-walled blade 1, as shown Figure 5 As shown, rough milling to produce the front 3D profile of the thin-walled blade 1 is an existing CNC machining process, which will not be introduced in detail here.

[0031] (Three) from the horizontal tooling bottom plate 18 on the part blank 3, and then turn the part blank 3 to make the unprocessed bottom surface upwardly installed on the horizontal tooling bottom plate 18, control the machining center to mill the upper surface of the part blank 3, and roughen the 3D surface of the reverse surface of the thin-walled blade 1. The clamping and processing of the part blank 3 in this step are the same as in step (two).

[0032] (Four) the part blank 3 is unloaded from the horizontal tooling bottom plate 18, and artificial aging heat treatment is performed on the part blank 3. The purpose is to remove stress. The artificial aging heat treatment process used in this step is a prior art, and will not be described in detail here.

[0033] (Five) the part blank 3 after artificial aging heat treatment is clamped on the horizontal tooling bottom plate 18 of the machining center workbench, and the machining center is controlled to mill the upper surface of the part blank 3 to finish machining the curved surface profile of the front surface of the thin-walled blade 1. The clamping of the part blank 3 in this step is the same as in step (two), and the difference in processing is that the machining center is replaced with a fine milling cutter. The fine milling process to produce the curved surface profile of the front surface of the thin-walled blade 1 is a prior numerical control machining process, and will not be described in detail here.

[0034] (Six) the part blank 3 is unloaded from the horizontal tooling bottom plate 18, and a row of support columns 13 is installed at the middle position of the horizontal tooling bottom plate 18. Then the part blank 3 is turned over to make the unfinely processed bottom surface upwardly installed on the horizontal tooling bottom plate 18, and the support columns 13 are supported on the bottom surface of the part blank 3. The machining center is controlled to mill the upper surface of the part blank 3 to finish machining the curved surface profile of the reverse surface of the thin-walled blade 1. The middle position of the horizontal tooling bottom plate 18 is provided with a row of positioning holes 12, and the support column 13 is in the shape of a mushroom. The support column 13 includes a column body 14 arranged in the positioning hole 12 and a support block 15 connected to the top end of the column body 14. The top surface of the support block 15 is an arc surface, which is arranged to ensure that it is always in contact with the bottom surface of the part blank 3, thereby ensuring the stability of the support. The column body 14 of the support column 13 is arranged in the positioning hole 12 of the horizontal tooling bottom plate 18. A locking screw hole is provided in the side wall of the horizontal tooling bottom plate 18 and extends vertically inwardly and penetrates the positioning hole 12. A locking screw is arranged in the locking screw hole, and when the locking screw is tightened inwardly, it can press the column body 14 of the support column 13 and further press the support column 13.

[0035] (Seven) the part blank 3 is unloaded from the horizontal tooling bottom plate 18, and then the part blank 3 is installed on the vertical positioning plate 16, as shown in Figure 8As shown, the vertical positioning plate 16 is in L-shaped structure, which comprises a horizontal plate 18 and a vertical plate 17 connected to one end of the horizontal plate 18. The vertical positioning plate 16 is also provided with fixing holes and positioning pin holes, which are arranged at both side edges of the vertical plate 17 respectively. The positions of the fixing holes and the positioning pin holes on the vertical positioning plate 16 correspond to the positions of the fixing holes and the positioning pin holes on the part blank 3 respectively. The positioning pin is inserted into the positioning pin hole first, and then the bolt is inserted into the corresponding fixing hole to fix the part blank 3 on the vertical positioning plate 16. The bottom end of the vertical positioning plate 16 is fixed on the machining center workbench. The drill bit is controlled to move to the top surface of the part blank 3 above the shaft center of the adapter shaft sleeve 2, and then the drill bit is controlled to drill downward until it penetrates through the upper adapter shaft sleeve 2 to complete the first adapter shaft sleeve drilling.

[0036] (Eight) The part blank 3 is removed from the vertical positioning plate 16, and the part blank 3 is rotated by 180 degrees so that the unprocessed adapter shaft sleeve 2 on the part blank 3 is located at the upper side. The part blank 3 is fixed on the vertical positioning plate 16, and the bottom end of the vertical positioning plate 16 is fixed on the machining center workbench. The drill bit is controlled to move to the top surface of the part blank 3 above the shaft center of the adapter shaft sleeve 2, and then the drill bit is controlled to drill downward until it penetrates through the upper adapter shaft sleeve 2 to complete the second adapter shaft sleeve drilling. The clamping and processing of the part blank 3 in this step are the same as those in step (Seven). After processing, the part blank 3 is removed from the vertical positioning plate 16, as shown in Figure 9 .

[0037] (Nine) The part blank 3 shown in Figure 9 is positioned on the wire cutting machine workbench. Before processing, the part blank 3 needs to be clamped and positioned on the middle hollow horizontal tooling bottom plate II 19. The structure of the horizontal tooling bottom plate II 19 is shown in Figure 10 . The horizontal tooling bottom plate II 19 is provided with fixing holes and positioning pin holes, and the positions of the fixing holes and the positioning pin holes on the horizontal tooling bottom plate II 19 correspond to the positions of the fixing holes and the positioning pin holes on the part blank 3 respectively. The horizontal tooling bottom plate II 19 is provided with positioning steps 9 at both longitudinal ends. The wire cutting machine workbench is provided with a pressing block that can be pressed on the positioning steps and a locking device that locks the pressing block. Then the horizontal tooling bottom plate II 19 is positioned on the wire cutting machine workbench, as shown in Figure 11 . The middle part of the horizontal tooling bottom plate II 19 is provided with a hollow through slot 20 with the same outer contour as the thin-walled blade 1. The wire cutting machine is started, and the thin-walled blade 1 is cut from the part blank 3 along the outer contour of the thin-walled blade 1 for one circle. The thin-walled blade 1 is separated from the outer frame of the part blank 3, and the part separated from the outer frame of the part blank 3 is the thin-walled blade 1 to be processed.

[0038] The above embodiments are only the preferred embodiments of the present application, and the structure of the present application is not limited to the forms listed in the above embodiments, and any modification, equivalent replacement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for processing a thin-walled blade with an adapter sleeve, characterized in that: The following steps are involved: (1) According to the overall outline size of the thin-walled blade to be machined, a rectangular alloy block whose length, width and height are all larger than the overall length, width and height of the part is selected as the part blank (3), and a fixing hole (4) and a positioning pin hole (5) are respectively machined at the edge positions on both sides of the longitudinal direction of the part blank (3); (2) Clamping the part blank (3) on the horizontal tooling base plate I (8) on the workbench of the machining center, controlling the machining center to perform milling on the upper side of the part blank (3), and rough-machining the front 3D surface of the thin-walled blade (1); (3) removing the part blank (3) from the horizontal tooling base plate I (8), then turning the part blank (3) over so that the unprocessed bottom surface faces upward and mounting it on the horizontal tooling base plate I (8), controlling the machining center to perform milling on the upper side of the part blank (3), and rough-machining the 3D surface of the reverse side of the thin-walled blade (1); (4) removing the part blank (3) from the horizontal tooling base plate I (8), and performing artificial aging heat treatment on the part blank (3); (5) Clamping the part blank (3) after artificial aging heat treatment on the horizontal tooling base plate I (8) of the workbench of the machining center, controlling the machining center to perform milling on the upper side of the part blank (3), and finishing the front curved surface contour of the thin-walled blade (1); (6) Unloading the part blank (3) from the horizontal tooling base plate I (8), installing a row of support columns (13) at the middle position of the horizontal tooling base plate I (8), then turning the part blank (3) over so that the unfinished bottom surface faces upward and installing it on the horizontal tooling base plate I (8), with the support columns (13) supporting the bottom surface of the part blank (3), controlling the machining center to perform milling on the upper side surface of the part blank (3), and finishing the reverse curved surface contour of the thin-walled blade (1); (VII) Remove the part blank (3) from the horizontal tooling base plate I (8), and then install the part blank (3) on the vertical positioning plate (16), the bottom end of the vertical positioning plate (16) is fixed on the workbench of the machining center, control the drill bit to move to the top surface of the part blank (3) just above the axis position of the adapter sleeve (2), control the drill bit to drill downward until it penetrates the adapter sleeve (2) located on the upper side, and complete the drilling of the first adapter sleeve (2); (8) Remove the part blank (3) from the vertical positioning plate (16), rotate the part blank (3) 180 degrees so that the unprocessed adapter sleeve (2) on the part blank (3) is located on the upper side, fix the part blank (3) on the vertical positioning plate (16), fix the bottom end of the vertical positioning plate (16) on the workbench of the machining center, control the drill bit to move to the top surface of the part blank (3) just above the axis position of the adapter sleeve (2), control the drill bit to drill downward until it penetrates the adapter sleeve (2) located on the upper side, and complete the drilling of the second adapter sleeve (2); (IX) Positioning the part blank (3) on the workbench of the wire cutting machine, cutting the thin-walled blade (1) from the part blank (3) by cutting the thin-walled blade (1) along the outer contour of the thin-walled blade (1) in one circle.

2. A method for processing a thin-walled blade with an adapter sleeve according to claim 1, characterized in that: Before processing in step (9), the part blank (3) needs to be clamped and positioned on the horizontal tooling base plate II (19) with a hollow center, and then the horizontal tooling base plate II (19) is positioned on the workbench of the wire cutting machine. The center of the horizontal tooling base plate II (19) is provided with a hollow through groove (20) with the same outer contour as the thin-walled blade (1).

3. A method for processing a thin-walled blade with an adapter sleeve as claimed in claim 2, characterized in that: The horizontal tooling base plate I (8), the horizontal tooling base plate II (19) and the vertical positioning plate (16) are respectively provided with fixing holes and positioning pin holes, and the positions of the fixing holes and positioning pin holes on the horizontal tooling base plate I (8), the horizontal tooling base plate II (19) and the vertical positioning plate (16) respectively correspond to the positions of the fixing holes and positioning pin holes on the part blank (3).

4. A method for processing a thin-walled blade with an adapter sleeve as claimed in claim 3, characterized in that: The vertical positioning plate (16) is in an L-shaped structure. The vertical positioning plate (16) comprises a horizontal plate (18) and a vertical plate (17) vertically connected to one end of the horizontal plate (18). The fixing holes and the positioning pin holes are respectively arranged at the edge positions on both sides of the vertical plate (17).

5. The method for processing a thin-walled blade with an adapter sleeve according to claim 2, characterized in that: Positioning steps (9) are respectively provided at both ends of the longitudinal direction of the horizontal tooling base plate I (8) and the horizontal tooling base plate II (19), and a pressing block (10) that can be pressed on the positioning step (9) and a locking device (11) for locking the pressing block (10) are provided on the workbench of the machining center.

6. A method for processing a thin-walled blade with an adapter sleeve according to claim 1, characterized in that: The horizontal tooling base plate I (8) is provided with a row of positioning holes (12) at the middle position. The support column (13) is a mushroom-shaped structure as a whole. The support column (13) includes a column (14) arranged in the positioning hole (12) and a support block (15) connected to the top of the column (14). The top surface of the support block (15) is an arc surface.

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