Machining method of thin-wall blade with adapter shaft sleeve

Abstract

The machining method comprises the following steps that a rectangular alloy block with the length, the width and the height larger than the overall length, the width and the height of a part is selected as a part blank, and a fixing hole and a positioning pin hole are machined in the part blank; the part blank is clamped to a horizontal tool bottom plate I on a machining center workbench, the front and back 3D molded surfaces of the thin-wall blade are roughly machined correspondingly, artificial aging heat treatment is conducted on the part blank, then the part blank is clamped to the horizontal tool bottom plate I, and the curved surface contours of the front and back sides of the thin-wall blade are finely machined correspondingly; and then the part blank is installed on a vertical tool plate on a machining center workbench, drilling of the two adapter shaft sleeves is completed, finally, the part blank is positioned on a linear cutting machine tool workbench, and a circle of wires are fed along the outer contour of the thin-wall blade so that the thin-wall blade can be cut off from the part blank. By the adoption of the method, the machining and clamping process is simple, the production efficiency can be effectively improved, and the product percent of pass is guaranteed.

Description

Technical Field

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

[0002] like Figure 1 , 2 The thin-walled blade with adapter sleeve shown is an integrated part made of aviation aluminum alloy material. Both sides of the blade need to be processed. The thickness of the blade is relatively thin, and the thinnest part is only 0.2mm. 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 gypsum on the processed side, wait for the gypsum to solidify and form an integral structure with the workpiece, and then use the gypsum surface as the positioning surface to process the other side of the blade, and then drill the two adapter sleeves respectively, and finally remove the gypsum to obtain the completed part. This existing processing method has the following defects: 1. It takes a long time for the gypsum to form and harden, and it also takes time to remove the gypsum body after processing, which can easily affect the production cycle and efficiency; 2. The finished surface of the part is easily corroded when it contacts the gypsum, affecting the surface quality and appearance of the part; 3. The gypsum will stretch the part during the hardening process, causing the contour and size of the workpiece to change, increasing the dimensional error and reducing the qualified rate of the part. Summary of the invention

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

[0004] The technical solution adopted by the present invention to achieve the above-mentioned purpose is: a processing method for a thin-walled blade with an adapter sleeve, comprising the following steps: (i) according to the overall outline size of the thin-walled blade to be processed, 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, and fixing holes and positioning pin holes are respectively processed at the edge positions on both sides of the longitudinal direction of the part blank; (ii) the part blank is clamped on the horizontal tooling base plate I on the workbench of the machining center, and the machining center is controlled to perform milling on the upper side of the part blank to roughly process the front 3D surface of the thin-walled blade; (iii) from the horizontal tooling base plate I (iv) remove the part blank from the horizontal tooling base plate I and perform artificial aging heat treatment on the part blank; (v) clamp the part blank after artificial aging heat treatment on the horizontal tooling base plate I of the machining center workbench, control the machining center to perform milling on the upper side of the part blank, and finish the front curved surface contour of the thin-walled blade; (vi) remove the part blank from the horizontal tooling base plate I, Install a row of support columns at the middle of the horizontal tooling base plate I, then flip the part blank so that the unfinished bottom surface faces upward and install it on the horizontal tooling base plate I, with the support columns supporting the bottom surface of the part blank, and control the machining center to perform milling on the upper surface of the part blank to fine-machine the reverse curved surface contour of the thin-walled blade; (VII) Remove the part blank from the horizontal tooling base plate I, and then install the part blank on the vertical positioning plate. The bottom end of the vertical positioning plate is fixed on the workbench of the machining center, and the drill bit is controlled to move to the top surface of the part blank just above the axis position of the adapter sleeve, and the drill bit is controlled to drill downward until it penetrates the adapter sleeve located on the upper side. , complete the drilling of the first adapter sleeve; (viii) remove the part blank from the vertical positioning plate, rotate the part blank 180 degrees so that the unprocessed adapter sleeve on the part blank is on the upper side, fix the part blank on the vertical positioning plate, fix the bottom end of the vertical positioning plate on the workbench of the machining center, control the drill bit to move to the top surface of the part blank just above the axis position of the adapter sleeve, control the drill bit to drill downward until it penetrates the adapter sleeve on the upper side, and complete the drilling of the second adapter sleeve; (ix) position the part blank on the workbench of the online cutting machine tool, cut the thin-walled blade from the part blank by cutting the wire along the outer contour of the thin-walled blade.

[0005] A further technical solution of the present invention is: before processing in step (IX), the part blank needs to be clamped and positioned on a horizontal tooling base plate II with a hollow middle portion, and then the horizontal tooling base plate II is positioned on a workbench of an online cutting machine, and a hollow through groove having the same outer contour as the thin-walled blade is provided in the middle of the horizontal tooling base plate II.

[0006] A further technical solution of the present invention is: the horizontal tooling base plate I, the horizontal tooling base 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 positioning pin holes on the horizontal tooling base plate I, the horizontal tooling base plate II and the vertical positioning plate respectively correspond one-to-one to the positions of the fixing holes and positioning pin holes on the part blank.

[0007] A further technical solution of the present invention is: the vertical positioning plate is L-shaped, comprising a horizontal plate and a vertical plate vertically connected to one end of the horizontal plate, and fixing holes and positioning pin holes are respectively arranged at the edge positions on both sides of the vertical plate.

[0008] A further technical solution of the present invention is that positioning steps are respectively provided at both ends of the longitudinal direction of the horizontal tooling base plate I and the horizontal tooling base plate II, and a pressure block that can be pressed on the positioning step and a locking device for locking the pressure block are provided on the workbench of the machining center.

[0009] A further technical solution of the present invention is: a row of positioning holes is arranged in the middle of the horizontal tooling base plate I, and the support column is a mushroom-shaped structure as a whole. The support column includes a column body arranged in the positioning hole and a support block connected to the top of the column body, and the top surface of the support block is an arc surface.

[0010] The processing method of a thin-walled blade with an adapter sleeve of the present invention has the following beneficial effects: 1. By selecting a rectangular alloy block whose length, width and height are all larger than the overall length, width and height of the part as the part blank for processing the thin-walled blade, and processing fixing holes and positioning pin holes on both sides of the part blank, the positioning of the part blank becomes simpler. During positioning, only a flat positioning plate and positioning bolts, positioning pins and other simple positioning tooling are needed to clamp the part blank. The device is simple, low in cost, easy to operate, fast in disassembly, and the positioning and disassembly process of the part blank is simple. Due to the large volume of the blank, small vibration and high position accuracy, the processing quality of the front and back sides of the thin-walled blade is guaranteed, which can effectively improve production efficiency and ensure product qualification rate; 2. When finishing thin-walled blades, a row of support columns is installed in the horizontal tooling base plate I. The support columns can support the bottom surface of the thin-walled blades, reduce the deformation of parts due to excessive vibration during the processing, and can also effectively ensure the product qualification rate; 3. After machining the upper and lower side contours of the thin-walled blade, position the blank on the vertical positioning plate before cutting off the edge material of the blank, and then drill the two shaft holes on the adapter sleeves respectively. The clamping and positioning of the blank is simple and fast, and the position accuracy is easy to ensure. The position accuracy of the machined shaft hole is high, which not only improves production efficiency but also ensures the product qualification rate; 4. After processing the contour of the part, a horizontal tooling base plate II with a hollow middle 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.

[0011] The following is a further description of a method for processing a thin-walled blade with a transfer sleeve according to the present invention in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of a thin-walled blade with an adapter sleeve; Figure 2 yes Figure 1 The schematic diagram of the structure of the other side of the thin-walled blade with the adapter sleeve is shown; 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; Figure 4 Yes Figure 3 The schematic diagram of the structure in which the part blank is installed on the horizontal tooling bottom plate Ⅰ; Figure 5 It is a schematic diagram of the structure in which the part blank is installed on the horizontal tooling base plate I and the thin-walled blade 3D profile is processed; Figure 6 It is a schematic diagram of the structure in which the part blank is mounted on the horizontal tooling base plate I in step (VI) to prepare for fine machining of the thin-walled blade; Figure 7 yes Figure 6 Cross-sectional view along AA direction; Figure 8 It is a structural diagram of the part blank being installed on the vertical positioning plate; Fig. 9 It is a schematic diagram of the structure of the part blank removed from the vertical positioning plate after completing the processing of step (eight); Fig.10 It is a structural schematic diagram of the horizontal tooling bottom plate II; Fig.11 Yes Fig. 9 The schematic diagram of the structure in which the part blank is installed on the horizontal tooling bottom plate II; 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-pressing 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

[0013] The present invention provides a method for processing a thin-walled blade with an adapter sleeve, comprising the following steps: (i) According to the overall outline size of the thin-walled blade to be processed, a rectangular alloy block whose length, width and height are all 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 positioning pin holes 5 are respectively processed on both sides of the longitudinal direction of the part blank 3 (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 the fixing bolts 6 to lock the part blank 3, and the positioning pin holes 5 are used to cooperate with the positioning pins 7 to locate the position of the part blank 3. In this embodiment, two positioning pin holes 5 are set on one side of the longitudinal direction of the part blank 3, and three fixing holes 4 are set on each side of the longitudinal direction of the part blank 3. The number of fixing holes can be appropriately changed according to the length of the part blank 3, as long as the part blank 3 can be locked.

[0014] (ii) Clamp the part blank 3 on the horizontal tooling base plate Ⅰ8 on the workbench of the machining center, as shown in Figure 4 As shown. The horizontal tooling base plate Ⅰ8 is also provided with fixing holes and locating pin holes. The positions of the fixing holes and locating pin holes on the horizontal tooling base plate Ⅰ8 correspond to the positions of the fixing holes and locating pin holes on the part blank 3. First, insert the locating pin into the locating 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 longitudinal direction of the horizontal tooling base plate Ⅰ8. 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 workbench of the machining center is not shown in the figure. The workbench 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 3D profile of the front surface of the thin-walled blade 1 is an existing CNC machining process, which will not be introduced in detail here.

[0015] (iii) Remove the part blank 3 from the horizontal tooling base plate Ⅰ8, then turn the part blank 3 over so that the unprocessed bottom surface faces upward and install it on the horizontal tooling base plate Ⅰ8, control the machining center to mill the upper surface of the part blank 3, and roughly process the 3D surface on the back side of the thin-walled blade 1. The clamping and processing of the part blank 3 in this step are the same as step (ii).

[0016] (IV) The part blank 3 is removed from the horizontal tooling bottom plate Ⅰ8 and artificial aging heat treatment is performed on the part blank 3 for stress relief. The artificial aging heat treatment process used in this step is the existing technology and will not be described in detail herein.

[0017] (V) Clamp the part blank 3 after artificial aging heat treatment on the horizontal tooling base plate Ⅰ8 of the workbench of the machining center, control the machining center to perform milling on the upper surface of the part blank 3, and fine-process the front curved surface contour of the thin-walled blade 1. The clamping of the part blank 3 in this step is the same as step (II). The difference in processing is that the machining center replaces the fine milling tool. Fine milling to produce the front curved surface contour of the thin-walled blade 1 is an existing CNC machining process, which will not be introduced in detail here.

[0018] (VI) Remove the part blank 3 from the horizontal tooling bottom plate Ⅰ8, install a row of support columns 13 in the middle of the horizontal tooling bottom plate Ⅰ8, then turn the part blank 3 over so that the unfinished bottom surface faces upward and install it on the horizontal tooling bottom plate Ⅰ8, the support column 13 supports the bottom surface of the part blank 3, and controls the machining center to perform milling on the upper surface of the part blank 3 to finely machine the reverse curved surface contour of the thin-walled blade 1. A row of positioning holes 12 is set in the middle of the horizontal tooling bottom plate Ⅰ8, and the support column 13 is a mushroom-shaped structure as a whole. The support column 13 includes a column 14 set 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. The support block 15 is set as an arc surface 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 base plate Ⅰ8. A locking screw hole is provided on one side wall of the horizontal tooling base plate Ⅰ8, which extends vertically inward and passes through the positioning hole 12. The locking screw is installed in the locking screw hole. When the locking screw is tightened inward, the locking screw can press the column body 14 of the support column 13 and then press the support column 13.

[0019] (VII) Remove the part blank 3 from the horizontal tooling base plate Ⅰ8, and then install the part blank 3 on the vertical positioning plate 16, as shown in FIG. Figure 8As shown, the vertical positioning plate 16 is an L-shaped structure, and the vertical positioning plate 16 includes a horizontal plate 18 and a vertical plate 17 vertically 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 respectively arranged at the edge positions of both sides of the vertical plate 17. The positions of the fixing holes and positioning pin holes on the vertical positioning plate 16 correspond to the positions of the fixing holes and positioning pin holes on the part blank 3. The positioning pins are first inserted into the positioning pin holes, and then the bolts are inserted into the corresponding fixing holes 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 workbench of the machining center, and the drill bit is controlled to move to the top surface of the part blank 3 just above the axis position of the adapter sleeve 2, and the drill bit is controlled to drill downward until it penetrates the adapter sleeve 2 located on the upper side, completing the drilling of the first adapter sleeve.

[0020] (VIII) 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, and then 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. The clamping and processing of the part blank 3 in this step are the same as step (VII). After the processing is completed, remove the part blank 3 from the vertical positioning plate 16, as shown in FIG. Fig. 9 shown.

[0021] 9. General Fig. 9 The part blank 3 shown is positioned on the workbench of the online cutting machine. Before processing, the part blank 3 needs to be clamped and positioned on the horizontal tooling bottom plate Ⅱ19 with a hollow center. The structure of the horizontal tooling bottom plate Ⅱ19 is as follows: Fig.10 As shown, the horizontal tooling base plate Ⅱ19 is 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 Ⅱ19 correspond to the positions of the fixing holes and positioning pin holes on the part blank 3. Positioning steps 9 are respectively provided at both ends of the longitudinal direction of the horizontal tooling base plate Ⅱ19, and a pressure block that can be pressed on the positioning step and a locking device for locking the pressure block are provided on the workbench of the wire cutting machine. Then, the horizontal tooling base plate Ⅱ19 is positioned on the workbench of the wire cutting machine, as shown in FIG. Fig.11 As shown, a hollow through groove 20 having the same outer contour as the thin-walled blade 1 is provided in the middle of the horizontal tooling bottom plate II 19. The wire cutting machine is started to work, and the thin-walled blade 1 is cut off from the part blank 3 by cutting the wire along the outer contour of the thin-walled blade 1. 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.

[0022] The above embodiments are only preferred embodiments of the present invention. The structure of the present invention is not limited to the forms listed in the above embodiments. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for processing a thin-walled blade with an adapter sleeve, characterized in that: The following steps are involved: (i) According to the overall outline size of the thin-walled blade to be processed, a rectangular alloy block whose length, width and height are all greater than the overall length, width and height of the part is selected as the part blank (3), and fixing holes (4) and positioning pin holes (5) are respectively processed at the edge positions on both sides of the longitudinal direction of the part blank (3); (ii) clamping the part blank (3) on a horizontal tooling base plate I (8) on a workbench of a machining center, and controlling the machining center to perform milling on the upper surface of the part blank (3) to rough-machine a front 3D profile of the thin-walled blade (1); (iii) removing the part blank (3) from the horizontal tooling base plate I (8), flipping the part blank (3) 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 surface of the part blank (3), and rough-machining a 3D surface on the reverse side of the thin-walled blade (1); (iv) removing the part blank (3) from the horizontal tooling bottom 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 worktable of the machining center, controlling the machining center to perform milling on the upper surface of the part blank (3), and fine-machining the front curved surface contour of the thin-walled blade (1); (vi) removing the part blank (3) from the horizontal tooling base plate I (8), installing a row of support columns (13) at the middle of the horizontal tooling base plate I (8), flipping the part blank (3) 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 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); (VIII) 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 worktable of the wire cutting machine, cutting the thin-walled blade (1) from the part blank (3) by cutting the wire 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 as claimed in claim 1, characterized in that: Before processing in step (IX), the part blank (3) needs to be clamped and positioned on a horizontal tooling base plate II (19) with a hollow center, and then the horizontal tooling base plate II (19) is positioned on a workbench of an online cutting machine. A hollow through groove (20) having the same outer contour as the thin-walled blade (1) is provided in the middle of the horizontal tooling base plate II (19).

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, comprising a horizontal plate (18) and a vertical plate (17) vertically connected to one end of the horizontal plate (18), and fixing holes and positioning pin holes are respectively arranged at the edge positions on both sides of the vertical plate (17).

5. A method for processing a thin-walled blade with an adapter sleeve as claimed in claim 2, characterized in that: Positioning steps (9) are respectively provided at both ends of the horizontal tooling base plate I (8) and the horizontal tooling base plate II (19) in the longitudinal direction, 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 working table of the machining center.

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

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