Special tool for numerical control milling of fairing
By designing a special tooling for CNC milling of the fairing, and utilizing the bearing grooves and positioning bosses of the concave and convex die inserts, combined with push-pull quick clamps and guide sleeves, the problems of springback and dimensional inconsistency in CNC milling of the fairing were solved, improving accuracy and efficiency and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-14
- Publication Date
- 2026-04-17
AI Technical Summary
The fairing suffers from springback deformation and dimensional inconsistencies during CNC milling, affecting machining accuracy and stability, and resulting in low efficiency.
The flow guide is machined using a special tooling for CNC milling, including a concave die insert and a convex die insert. It is designed with a bearing groove and a positioning boss structure, and works with a push-pull quick clamp and a guide sleeve to achieve precise positioning and avoid springback.
It improves the accuracy and stability of milling, reduces manual debugging time, significantly improves processing efficiency, and reduces production costs.
Smart Images
Figure CN224129148U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of machining tooling technology for aero-engine parts, specifically a special tooling for CNC milling of a fairing. Background Technology
[0002] Numerical control (NC) machining is a technology that uses digital information to control the machining process. It features high precision, high efficiency, multifunctionality, flexibility, good repeatability, high rigidity, high degree of automation, and concentrated processes.
[0003] For the fairing (see Figures 13-15 For parts with complex shapes and thin thicknesses that are milled after sheet metal forming, the following problems exist when CNC milling their outer contours: Since the parts are sheet metal forming parts, there will be springback deformation and inconsistent overall cross-sectional dimensions, which will seriously affect the processing accuracy, result in poor processing stability, and affect processing efficiency. Utility Model Content
[0004] The purpose of this invention is to provide a special tooling for CNC milling of guide fairings that has a reasonable structure and reliable use, thereby improving the accuracy and stability of CNC milling, ensuring the accuracy of part dimensions, saving the time of manual straightening and debugging, significantly improving the efficiency of CNC milling, and further reducing production costs.
[0005] The technical solution of this utility model is:
[0006] A special tooling for CNC milling of a flow guide includes a concave die insert and a convex die insert. The key technical features are: the upper surface of the concave die insert is provided with a bearing boss, and the upper surface of the bearing boss is provided with a bearing groove. The top surfaces of the front and rear sidewalls of the bearing groove are arc surfaces adapted to milling the top surfaces of the front and rear sidewalls of the flow guide. The front sidewall of the bearing groove is further provided with multiple first U-shaped clearance grooves adapted to milling the U-shaped opening on the flow guide. The lower surface of the convex die insert is provided with a positioning boss that mates with the bearing groove. The front sidewall of the positioning boss is provided with a second U-shaped clearance groove corresponding to the first U-shaped clearance grooves. The left and right ends of the positioning boss and the bearing groove are respectively provided with inclined surfaces adapted to milling the left and right ends of the flow guide. The upper left and right ends of the convex die insert are respectively provided with fixing holes for connection with a fixture.
[0007] The aforementioned CNC milling fixture for the flow guide cover has a left guide sleeve and a right guide sleeve fixed to the left and right end faces of the die insert. The left and right guide sleeves are respectively provided with longitudinal guide holes. A left push-pull quick clamp is fixed to the top of the left guide sleeve, and the lower end of the telescopic rod of the left push-pull quick clamp is inserted into the longitudinal guide hole of the left guide sleeve. A right push-pull quick clamp is fixed to the top of the right guide sleeve, and the lower end of the telescopic rod of the right push-pull quick clamp is inserted into the longitudinal guide hole of the right guide sleeve. The sides of the left and right guide sleeves are provided with guide grooves corresponding to the ends of the punch inserts. The left and right ends of the punch inserts are inserted into the corresponding guide grooves and connected and fixed to the lower ends of the corresponding telescopic rods.
[0008] The aforementioned CNC milling fixture for the flow guide cover forms a milling clearance space between the left guide sleeve and the left end face of the bearing groove of the die insert, and a milling clearance space between the right guide sleeve and the right end face of the bearing groove of the die insert.
[0009] The beneficial effects of this utility model are:
[0010] 1. In use, place the guide shield to be milled into the bearing groove of the concave die insert, and then insert the positioning boss of the convex die insert into the guide shield to clamp and position it. The above-mentioned structural features of the bearing groove and the positioning boss facilitate the milling of the outer contour edge of the guide shield, while avoiding springback, significantly improving the milling accuracy and stability, and ensuring the accuracy of the part dimensions. It also saves the time of manual straightening and adjustment, significantly improving the efficiency of CNC milling and further reducing production costs.
[0011] 2. During use, the left push-pull quick clamp and the right push-pull quick clamp are used to quickly lift and push down the punch insert, which facilitates quick positioning and quick demolding, further improving processing efficiency. The left guide sleeve and the right guide sleeve further improve processing accuracy. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of this utility model;
[0013] Figure 2 yes Figure 1 The left view;
[0014] Figure 3 yes Figure 1 Top view;
[0015] Figure 4 This is a structural diagram of the left push-pull quick clamp (right push-pull quick clamp) and some punch inserts;
[0016] Figure 5 This is a structural diagram of the left guide sleeve (right guide sleeve);
[0017] Figure 6 yes Figure 5 Top view;
[0018] Figure 7 This is a schematic diagram of the punch insert structure;
[0019] Figure 8 yes Figure 7 Top view;
[0020] Figure 9 yes Figure 7 The left view;
[0021] Figure 10 This is a schematic diagram of the structure of the die insert;
[0022] Figure 11 yes Figure 10 Top view;
[0023] Figure 12 yes Figure 10 The left view;
[0024] Figure 13 This is a schematic diagram of the fairing structure;
[0025] Figure 14 yes Figure 13 Top view;
[0026] Figure 15 yes Figure 13 The left view.
[0027] In the figure: 1. Left push-pull quick clamp, 101. Telescopic rod, 2. Right push-pull quick clamp, 3. Punch insert, 301. Positioning boss, 302. Second U-shaped clearance groove, 303. Fixing hole, 4. Right guide sleeve, 5. Die insert, 501. Bearing boss, 502. First U-shaped clearance groove, 503. Arc surface, 504. Inclined surface, 505. Bearing groove, 6. Flow guide, 601. U-shaped opening, 7. Left guide sleeve, 701. Guide groove, 702. Longitudinal guide hole. Detailed Implementation
[0028] The present invention will now be described in detail with reference to the accompanying drawings.
[0029] like Figures 1-15 As shown, the special tooling for CNC milling of the fairing includes a concave die insert 5 and a convex die insert 3.
[0030] The upper surface of the concave mold insert 5 is provided with a bearing boss 501, and the upper surface of the bearing boss 501 is provided with a bearing groove 505. The top surfaces of the front and rear side walls of the bearing groove 505 are arc surfaces 503 adapted to the milling of the top surfaces of the front and rear side walls of the guide shroud 6. The front side wall of the bearing groove 505 is also provided with a plurality of first U-shaped clearance grooves 502 adapted to the milling of the U-shaped opening 601 on the guide shroud 6.
[0031] The lower surface of the punch insert 3 is provided with a positioning boss 301 that mates with the bearing groove 505. The front side wall of the positioning boss 301 is provided with a second U-shaped clearance groove 302 corresponding to the first U-shaped clearance groove 502. The left and right ends of the positioning boss 301 and the bearing groove 505 are respectively provided with inclined surfaces 504 adapted to milling the left and right ends of the guide shroud 6. The upper left and right ends of the punch insert 3 are respectively provided with fixing holes 303 for connecting with the fixture.
[0032] In this embodiment, a left guide sleeve 7 and a right guide sleeve 4 are fixed to the left and right end faces of the die insert 5, respectively. The left guide sleeve 7 and the right guide sleeve 4 are each provided with a longitudinal guide hole. A left push-pull quick clamp 1 is fixed to the top of the left guide sleeve 7, and the lower end of the telescopic rod 101 of the left push-pull quick clamp 1 is inserted into the longitudinal guide hole 702 of the left guide sleeve 7. A right push-pull quick clamp 2 is fixed to the top of the right guide sleeve 4, and the lower end of the telescopic rod of the right push-pull quick clamp 2 is inserted into the longitudinal guide hole of the right guide sleeve 4. The side of the left guide sleeve 7 is provided with a guide groove 701 corresponding to the left end of the punch insert 3, and the side of the right guide sleeve 4 is provided with a guide groove corresponding to the right end of the punch insert 3. The left and right ends of the punch insert 3 are inserted into the corresponding guide grooves and connected and fixed to the lower ends of the corresponding telescopic rods. A milling clearance space is formed between the left guide sleeve 7 and the left end face of the bearing groove 505 of the die insert 5, and a milling clearance space is formed between the right guide sleeve 4 and the right end face of the bearing groove 505 of the die insert 5.
[0033] Operating instructions:
[0034] In use, the die insert 5 is fixed to the left and right guide sleeves 7 and 4 with bolts. The guide shield 6 to be milled is placed in the bearing groove 505 of the die insert 5. The left and right push-pull quick clamps 1 and 2 are pushed to push the punch insert 3 downward so that the positioning boss 301 is inserted into the guide shield 6 to achieve the purpose of clamping and positioning the guide shield 6, and milling can begin.
[0035] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made within the scope of this utility model should still fall within the scope of this patent.
Claims
1. A special tooling for CNC milling of a fairing, comprising a concave die insert and a convex die insert, characterized in that: The upper surface of the die insert is provided with a bearing boss, and the upper surface of the bearing boss is provided with a bearing groove. The top surfaces of the front and rear sidewalls of the bearing groove are arc surfaces adapted to the milling of the top surfaces of the front and rear sidewalls of the guide shroud. The front sidewall of the bearing groove is also provided with a plurality of first U-shaped clearance grooves adapted to the milling of the U-shaped opening on the guide shroud. The lower surface of the punch insert is provided with a positioning boss that mates with the bearing groove. The front sidewall of the positioning boss is provided with a second U-shaped clearance groove corresponding to the first U-shaped clearance groove. The left and right ends of the positioning boss and the bearing groove are respectively provided with inclined surfaces adapted to the milling of the left and right ends of the guide shroud. The upper left and right ends of the punch insert are respectively provided with fixing holes for connection with the fixture.
2. The special tooling for numerically controlling milling of a fairing according to claim 1, characterized in that: The left and right end faces of the die insert are fixed with a left guide sleeve and a right guide sleeve, respectively. The left and right guide sleeves are provided with longitudinal guide holes. The top of the left guide sleeve is fixed with a left push-pull quick clamp, and the lower end of the telescopic rod of the left push-pull quick clamp is inserted into the longitudinal guide hole of the left guide sleeve. The top of the right guide sleeve is fixed with a right push-pull quick clamp, and the lower end of the telescopic rod of the right push-pull quick clamp is inserted into the longitudinal guide hole of the right guide sleeve. The sides of the left and right guide sleeves are provided with guide grooves corresponding to the ends of the punch inserts. The left and right ends of the punch inserts are inserted into the corresponding guide grooves and connected and fixed to the lower ends of the corresponding telescopic rods.
3. The special tooling for numerically controlling milling of a fairing according to claim 2, characterized in that: A milling clearance space is formed between the left guide sleeve and the left end face of the bearing groove of the die insert, and a milling clearance space is formed between the right guide sleeve and the right end face of the bearing groove of the die insert.