A batch production eccentric bush lathe fixture

Abstract

The utility model relates to aviation machinery part processing field, concretely relates to a kind of batch production eccentric bush car lathe fixture.A kind of batch production eccentric bush car lathe fixture, the fixture includes clamping shaft, sleeve body;Clamping shaft one end is connected with lathe fixed, the other end sequentially passes through sleeve body, eccentric bush hole;Lowering groove is set up on the end face of sleeve body close to eccentric bush, eccentric bush end portion is placed in lowering groove.The utility model has the following advantages:1, the positioning and clamping efficiency of part can be greatly improved, and the batch production processing quality of such parts is efficiently and stably achieved, 2, the one-time machining forming of the eccentric amount between the inner hole of the part and the outer circle of the shaft is ensured, the design technical requirements are guaranteed, and the batch production pass rate is greatly improved, 3, the overall structure of tooling design is simple, the positioning and clamping principle is easy to understand, the worker is convenient and fast in operation and maintenance, the production effect is obvious, and the batch production processing benefit is good.

Description

Technical Field

[0001] This utility model relates to the field of aerospace mechanical parts processing, specifically to a mass production eccentric bushing lathe fixture. Background Technology

[0002] Bushings are common in aircraft structural design. Typically, these parts are machined using conventional turning. However, in practice, conventional turning is quite difficult for certain types of special eccentric bushings. The eccentricity of these bushings is difficult to guarantee effectively, often posing a significant challenge in turning. Furthermore, the overall clamping of eccentric bushings is inconvenient, resulting in low machining efficiency, frequent occurrences of out-of-tolerance hole diameters or elliptical holes, and unreliable eccentricity, all of which severely impact production delivery. Utility Model Content

[0003] The purpose of this invention is to provide a lathe fixture for mass production of eccentric bushings, which enables rapid positioning and clamping of parts, improves turning efficiency and batch production qualification rate, and ensures the quality of eccentric bushing parts.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a lathe fixture for mass production of eccentric bushings, the fixture comprising a clamping shaft and a bushing body; one end of the clamping shaft is connected and fixed to the lathe, and the other end passes through the bushing body and the inner hole of the eccentric bushing in sequence; a recessed groove is provided on the end face of the bushing body near the eccentric bushing, and the end of the eccentric bushing is placed in the recessed groove.

[0005] Preferably, the clamping shaft is a stepped shaft, the large end of which is connected and fixed to the lathe via a lathe three-jaw chuck; the small end is provided with an internal thread, and the axial positioning of the eccentric bushing is achieved by a round washer and a bolt.

[0006] Preferably, the end of the sleeve away from the recessed groove rests against the end face of the stepped shaft.

[0007] Preferably, an eccentric shim is installed in the recessed groove, the outer circle of the eccentric shim is adapted to the inner circle of the recessed groove, and the inner hole is used to position the outer circle of the eccentric bushing.

[0008] Preferably, a plurality of threaded holes are provided along the radial direction of the sleeve, and bolts are screwed into the threaded holes, with their ends pressing against eccentric washers.

[0009] Compared with the prior art, the present invention has the following advantages: 1. It can achieve rapid positioning and clamping of batch production eccentric bushings, which greatly improves the positioning and clamping efficiency of parts and ensures efficient and stable batch processing quality of such parts. 2. Ensuring the one-time machining of the eccentricity between the inner hole and the outer circle of the shaft of the part guarantees the design technical requirements and significantly improves the batch production qualification rate; 3. The tooling design has a simple overall structure, the positioning and clamping principles are easy to understand, the operation and maintenance by workers are convenient and quick, the production effect is obvious, and the batch processing benefits are good. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the eccentric bushing structure in an embodiment of this utility model; Figure 2 This is a schematic diagram of the structure of an embodiment of the present utility model; Figure 2 In the middle, 1. Lathe three-jaw chuck; 2. Sleeve body; 3. Eccentric washer; 4. Eccentric bushing; 5. Round washer; 6. Bolt; 7. Bolt; 8. Clamping shaft. Detailed Implementation

[0011] The following is in conjunction with the appendix Figure 1-2 Further details of this utility model: A lathe fixture for mass production of eccentric bushings, such as... Figure 2 As shown, it includes a clamping shaft 8 and a sleeve 2. The clamping shaft 8 is generally stepped, with its large end connected and fixed to the lathe via a lathe three-jaw 1. The outer circle of the stepped shaft at its small end mates with the inner hole of the eccentric bushing 4, and its end is threaded internally. The sleeve 2 is fitted onto the stepped shaft at the small end of the clamping shaft 8, and a recessed groove is formed on its end face away from the lathe. The lug end of the eccentric bushing 4 is placed in the recessed groove, and the other end is constrained between the lug 5 and the end face of the recessed groove by a round washer 5 and a bolt 6 that is compatible with the internal thread, thereby achieving axial positioning of the eccentric bushing 4.

[0012] In a preferred embodiment of this invention, an eccentric shim 3 is installed in the recessed groove. The outer circle of the eccentric shim 3 is adapted to the inner circle of the recessed groove, and its inner hole is used to position the outer circle of the eccentric bushing 4. Several threaded holes are opened radially along the sleeve body 2, and bolts 7 are screwed into the threaded holes. The ends of the bolts 7 press the eccentric shim 3 tightly to achieve the clamping of the eccentric bushing.

[0013] The usage steps are as follows: Step 1: Positioning and clamping the part. By inserting a stepped shaft at one end of the clamping shaft 8 into the inner hole of the eccentric bushing 4, the eccentric bushing 4 is placed in the recessed groove of the sleeve body 2. An eccentric shim 3 is added to achieve eccentric positioning of the part. Finally, the eccentric bushing part is indirectly clamped by tightening the eccentric shim 3 by tightening the end bolt 7, thus achieving the final clamping of the part.

[0014] Step 2: Turning the precision shaft outer diameter. Thanks to the use of this lathe fixture and the addition of eccentric shims 3 to convert the design eccentricity, the outer diameter shaft of the bushing can be machined using conventional lathe machining, while ensuring the design eccentricity requirements are met, thus improving the rapid positioning and clamping of the bushing.

[0015] Step 3: Remove the parts and inspect the delivery.

Claims

1. A lathe fixture for mass production of eccentric bushings, characterized in that: The fixture includes a clamping shaft and a sleeve; one end of the clamping shaft is connected and fixed to the lathe, and the other end passes through the sleeve and the inner hole of the eccentric bushing in sequence; a recessed groove is provided on the end face of the sleeve near the eccentric bushing, and the end of the eccentric bushing is placed in the recessed groove.

2. The lathe fixture for batch production of eccentric bushings according to claim 1, characterized in that: The clamping shaft is a stepped shaft, with its large end connected and fixed to the lathe via a lathe three-jaw chuck; its small end is provided with an internal thread, and the axial positioning of the eccentric bushing is achieved through a round washer and bolts.

3. The batch production eccentric bushing lathe fixture according to claim 2, characterized in that: The end of the sleeve away from the recessed groove rests against the end face of the stepped shaft.

4. The batch production eccentric bushing lathe fixture according to claim 1, characterized in that: An eccentric shim is installed in the recessed groove. The outer circle of the eccentric shim is adapted to the inner circle of the recessed groove, and its inner hole is used to position the outer circle of the eccentric bushing.

5. The batch production eccentric bushing lathe fixture according to claim 4, characterized in that: Several threaded holes are provided along the radial direction of the sleeve body. Bolts are screwed into the threaded holes, and their ends are pressed against eccentric washers.

Images