Zero-point positioning device for aviation thin-walled workpiece

Abstract

The utility model relates to the technical field of workpiece positioning, in particular to an aviation thin-walled workpiece zero point positioning device which comprises a base and a mounting plate, a plurality of positioning grooves are formed in the top of the base, blind rivets in one-to-one correspondence with the positioning grooves are arranged at the bottom of the mounting plate, abutting grooves are formed in the positions, close to the positioning grooves, of the top of the base, and the abutting grooves are matched with the positioning grooves. A connecting groove is formed between the abutting groove and the bottom of the positioning groove, a spring bolt is slidably connected into the connecting groove, a first hemispherical surface is arranged at the end, close to the abutting groove, of the spring bolt, an abutting rod is arranged in the abutting groove, and a second hemispherical surface is arranged at the bottom, close to the spring bolt, of the abutting rod. The top of the side wall of the abutting rod is in threaded connection with the abutting groove, and a locking groove corresponding to the spring bolt is formed in the side wall of the blind rivet. The abutting rod drives the spring bolt to lock and fix the blind rivet, an air pipe and a hydraulic pipe are not needed, the problem that the air pipe and the hydraulic pipe are wound is solved, and normal machining is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of workpiece positioning, and more specifically to a zero-point positioning device for aviation thin-walled parts. Background Art

[0002] Aviation thin-walled parts are made by placing aluminum alloy blanks on a four-axis, five-axis or other turntable machine, and milling them using milling cutters or other tools, thereby processing the aluminum alloy blanks into aviation thin-walled parts.

[0003] Aviation thin-walled parts have complex structures, large volumes, and long processing times. Strict positioning requirements are placed on the parts during processing, and a zero-point locator is required for positioning and locking to keep the zero point constant during processing. The locking mechanism of the existing zero-point locator uses air pressure or hydraulic pressure to push the steel ball to lock the pull pin, thereby achieving zero-point positioning.

[0004] However, during the processing of aviation thin-walled parts, four-axis and five-axis turntables will drive the aluminum alloy blanks to rotate, and the air pipes and hydraulic pipes of the zero-point locator are prone to entanglement, thus affecting the normal processing. Utility Model Content

[0005] The utility model aims to provide a zero-point positioning device for aviation thin-walled parts, which does not need to use air pipes and hydraulic pipes, avoids the problem of entanglement of air pipes and hydraulic pipes, and ensures normal processing.

[0006] In order to achieve the above purpose, the technical solution of the utility model is as follows:

[0007] A zero-point positioning device for aviation thin-walled parts comprises a base and a mounting plate, wherein a plurality of positioning grooves are provided on the top of the base, a rivet corresponding to the positioning grooves is provided on the bottom of the mounting plate, an abutment groove is provided on the top of the base near the positioning groove, a connecting groove is provided between the abutment groove and the bottom of the positioning groove, a locking tongue is slidably connected in the connecting groove, a first hemispherical surface is provided at one end of the locking tongue near the abutment groove, an abutment rod is provided in the abutment groove, the bottom of the abutment rod is close to the locking tongue and provided with a second hemispherical surface, the top of the side wall of the abutment rod is threadedly connected to the abutment groove, and a locking groove corresponding to the locking tongue is provided on the side wall of the rivet.

[0008] Furthermore, a first chamfer is provided at the bottom of the rivet.

[0009] Furthermore, an arc-shaped surface is provided at one end of the locking tongue close to the positioning groove, and a second chamfer is provided at the notch of the locking groove.

[0010] Furthermore, a sliding groove is provided on the side wall of the connecting groove, a limiting plate is slidably connected in the sliding groove, the limiting plate is fixedly connected to the locking tongue, and a spring is connected between the limiting plate and the sliding groove.

[0011] Furthermore, a hexagonal socket is formed on the top of the abutment rod.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The blank fixture is installed on the mounting plate, the rivet of the mounting plate is inserted into the positioning groove, and the abutment rod is turned into the abutment groove, so that the second hemispherical surface of the abutment rod contacts the first hemispherical surface of the lock tongue, and the lock tongue is pushed to slide along the connecting groove and approach the rivet. The lock tongue is inserted into the locking groove of the rivet, thereby limiting and fixing the rivet, thereby realizing zero-point positioning of the mounting plate; the utility model drives the lock tongue to lock and fix the rivet by the abutment rod, and there is no need to use air pipes and hydraulic pipes, thus avoiding the problem of entanglement of air pipes and hydraulic pipes, and ensuring the normal processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 This is a schematic diagram of the local structure of the utility model when the pull nail is not installed;

[0016] Figure 3 It is a schematic diagram of the local structure of the utility model when installing the pull nail.

[0017] 1. Base; 101. Positioning groove; 102. Abutment groove; 103. Connecting groove; 104. Slide groove; 2. Mounting plate; 3. Pull nail; 301. Locking groove; 31. First chamfer; 32. Second chamfer; 4. Lock tongue; 41. First hemispherical surface; 42. Arc surface; 5. Abutment rod; 501. Hexagonal socket; 51. Second hemispherical surface; 6. Limiting plate; 7. Spring. DETAILED DESCRIPTION

[0018] like Figures 1 to 3 As shown, a zero-point positioning device for aviation thin-walled parts includes a base 1 and a mounting plate 2, wherein the top of the base 1 is provided with a plurality of positioning grooves 101, the bottom of the mounting plate 2 is provided with a rivet 3 corresponding to the positioning grooves 101, the top of the base 1 is provided with an abutment groove 102 near the positioning groove 101, a connecting groove 103 is provided between the abutment groove 102 and the bottom of the positioning groove 101, a locking tongue 4 is slidably connected in the connecting groove 103, a first hemispherical surface 41 is provided at one end of the locking tongue 4 near the abutment groove 102, an abutment rod 5 is provided in the abutment groove 102, the bottom of the abutment rod 5 is close to the locking tongue 4 and is provided with a second hemispherical surface 51, the top of the side wall of the abutment rod 5 is threadedly connected to the abutment groove 102, and a locking groove 301 corresponding to the locking tongue 4 is provided on the side wall of the rivet 3.

[0019] A first chamfer 31 is provided at the bottom of the rivet 3; an arcuate surface 42 is provided at one end of the locking tongue 4 close to the positioning groove 101, and a second chamfer 32 is provided at the notch of the locking groove 301; the first chamfer 31 and the arcuate surface 42 are provided so that when the rivet 3 is inserted into the positioning groove 101, the locking tongue 4 is pushed toward the abutting groove 102; the second chamfer 32 and the arcuate surface 42 are provided so that when the rivet 3 is taken out of the positioning groove 101, the rivet 3 pushes the locking tongue 4 toward the abutting groove 102.

[0020] A sliding groove 104 is provided on the side wall of the connecting groove 103 . A limiting plate 6 is slidably connected in the sliding groove 104 . The limiting plate 6 is fixedly connected to the locking tongue 4 . A spring 7 is connected between the limiting plate 6 and the sliding groove 104 .

[0021] A hexagon socket 501 is formed on the top of the abutting rod 5 . The hexagon socket 501 is provided to facilitate the use of a hexagon socket wrench to rotate the abutting rod 5 .

[0022] Working principle:

[0023] The blank fixture is installed on the mounting plate 2, the rivet 3 of the mounting plate 2 is inserted into the positioning groove 101, and the abutment rod 5 is turned into the abutment groove 102, so that the second hemispherical surface 51 of the abutment rod 5 contacts the first hemispherical surface 41 of the lock tongue 4, and the lock tongue 4 is pushed to slide along the connecting groove 103 and approach the rivet 3. The spring 7 is stretched, and the lock tongue 4 is inserted into the locking groove 301 of the rivet 3, so that the rivet 3 is limited and fixed, thereby realizing the zero point positioning of the mounting plate 2; when disassembling, the abutment rod 5 is rotated to make the abutment rod 5 away from the lock tongue 4. Under the action of the spring 7, the lock tongue 4 is away from the rivet 3 and disengaged from the locking groove 301, so that the rivet 3 is taken out from the positioning groove 101; the utility model drives the lock tongue 4 to lock and fix the rivet 3 by the abutment rod 5, and there is no need to use the air pipe and the hydraulic pipe, which avoids the problem of the air pipe and the hydraulic pipe being entangled, and ensures the normal processing.

[0024] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A zero-point positioning device for aviation thin-walled parts, characterized in that: The invention comprises a base (1) and a mounting plate (2), wherein the top of the base (1) is provided with a plurality of positioning grooves (101), the bottom of the mounting plate (2) is provided with pull nails (3) corresponding to the positioning grooves (101) one by one, the top of the base (1) is provided with abutment grooves (102) close to the positioning grooves (101), a connecting groove (103) is provided between the abutment groove (102) and the bottom of the positioning groove (101), and a sliding connection is provided in the connecting groove (103). A locking tongue (4) is connected, and a first hemispherical surface (41) is provided at one end of the locking tongue (4) close to the abutting groove (102). An abutting rod (5) is provided in the abutting groove (102). The bottom of the abutting rod (5) is close to the locking tongue (4) and is provided with a second hemispherical surface (51). The top of the side wall of the abutting rod (5) is threadedly connected to the abutting groove (102). A locking groove (301) corresponding to the locking tongue (4) is provided on the side wall of the rivet (3).

2. The zero-point positioning device for aviation thin-walled parts according to claim 1, characterized in that: The bottom of the pull nail (3) is provided with a first chamfer (31).

3. The zero-point positioning device for aviation thin-walled parts according to claim 2, characterized in that: An arc-shaped surface (42) is provided at one end of the locking tongue (4) close to the positioning groove (101), and a second chamfer (32) is provided at the notch of the locking groove (301).

4. The zero-point positioning device for aviation thin-walled parts according to claim 1, characterized in that: A sliding groove (104) is provided on the side wall of the connecting groove (103), a limiting plate (6) is slidably connected in the sliding groove (104), the limiting plate (6) is fixedly connected to the locking tongue (4), and a spring (7) is connected between the limiting plate (6) and the sliding groove (104).

5. The zero-point positioning device for aviation thin-walled parts according to claim 1, characterized in that: The top of the abutment rod (5) is provided with a hexagonal socket (501).

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