Positioning and clamping tool for turning precise holes

Abstract

The utility model relates to the field of aviation mechanical part machining, in particular to a turning precision hole positioning and clamping tool which comprises a support part. The cylindrical base body is used for carrying out surface positioning on the end face of the front side or the rear side of the support part, meanwhile, surface positioning is carried out on the vertical section of the support part, and the stepped precision hole is coaxial with the cylindrical base body; and the pressing mechanism is arranged on the cylindrical base body and can move up and down, and the pressing mechanism is located below the support part. According to the utility model, the precise stepped hole of the support part can be quickly positioned and clamped, and the positioning and clamping efficiency of the part is greatly improved; traditional boring machining is changed into hole turning machining, the coaxiality is guaranteed, and the batch production efficiency of parts is greatly improved; in addition, the tool is simple in overall structure, convenient and fast to operate and maintain by workers, obvious in production effect and good in batch production processing benefit.

Description

Technical Field

[0001] The utility model relates to the field of machining of aviation mechanical parts, in particular to a positioning and clamping tooling for turning precision holes. Background Technique

[0002] As common machining structural parts, aircraft support parts are widely used in mechanical connection and reinforcement of aircraft parts. Usually, such support parts are designed with a stepped hole structure, and their coaxiality and hole accuracy requirements are relatively high. In actual production operations, the machining of the stepped precision holes of the support can be completed by traditional boring machining, but its boring machining efficiency is low and the cost is high, which cannot meet the batch production machining requirements. In addition, for some support parts with special-shaped structures (with compound angles and curved surfaces), the positioning and clamping of such parts are very difficult. For example, Figure 1 for the shown aircraft support, there is a curved surface at the bottom of the support. Content of the Utility Model

[0003] The purpose of the utility model is to solve the problems of difficult clamping of special-shaped aircraft supports in the background technique and low efficiency and high cost of machining the stepped precision holes by traditional boring. A positioning and clamping tooling for turning precision holes is proposed.

[0004] The technical solution of the utility model: A positioning and clamping tooling for turning precision holes, including a support part. The support part has an inverted T-shaped structure. There is a section of curved surface on the bottom surface of the horizontal section of the support part, and stepped precision holes are opened on the vertical section. The precision holes form openings on the front and rear end faces of the support part. It also includes:

[0005] A cylindrical base body, which performs surface positioning on the front or rear end face of the support part, and at the same time performs surface positioning on the vertical section of the support part. The stepped precision holes are coaxial with the cylindrical base body;

[0006] And a pressing mechanism, which is arranged on the cylindrical base body and can move up and down. The pressing mechanism is located below the support part. When the pressing mechanism moves upward, it abuts against the bottom surface of the support part to realize the clamping of the support part. When the pressing mechanism moves downward, the clamping state is released.

[0007] Preferably, after the support part is clamped, the stepped precision holes are machined by turning.

[0008] Preferably, a three-jaw clamping section is arranged coaxially on the cylindrical base body, and the three-jaw of the lathe on the lathe clamps the three-jaw clamping section.

[0009] Preferably, a part embedding groove is arranged on the end face of the cylindrical base body. The vertical section of the support part is fitted and clamped into the part embedding groove. A groove a is arranged on the cylindrical base body. The groove a is communicated with the part embedding groove and is located below the part embedding groove. One of the front side or the rear side of the support part is in surface contact with the groove a.

[0010] Preferably, a groove b is provided on the cylindrical base body. The groove b communicates with the groove a and is located below the groove a. Compared with the groove a, the groove b extends further into the cylindrical base body in the axial direction of the cylindrical base body. The groove b and the groove a form a stepped groove. The pressing mechanism includes:

[0011] A bolt, the top of which is screwed into a threaded hole vertically provided on the top wall of the groove b;

[0012] And a pressing plate, on which a through hole for the rod part of the bolt to pass through is provided. The pressing plate moves upward synchronously with the bolt, and finally the pressing plate abuts against the bottom surface of the support part and the top wall of the groove b at the same time.

[0013] Compared with the prior art, the utility model has the following beneficial technical effects: it can realize the rapid positioning and clamping of the precision stepped holes of the support parts, greatly improving the positioning and clamping efficiency of the parts; and changing the traditional boring process to a turning process not only ensures that each stepped hole is machined in one pass and the coaxiality is guaranteed, but also greatly improves the batch production efficiency of the parts; in addition, the overall structure of the tooling design is simple, the operation and maintenance of workers are convenient and fast, the production effect is obvious, and the batch production and processing benefit is good. Description of the Drawings

[0014] Figure 1 It is a structural schematic diagram of a special-shaped support;

[0015] Figure 2 It is a structural schematic diagram of an embodiment of the utility model;

[0016] Figure 3 It is Figure 2 The front view of;

[0017] Figure 4 It is Figure 2 The side view of.

[0018] Reference numerals: 1, support part; 2, three-jaw chuck of lathe; 3, cylindrical base body; 4, bolt; 5, pressing plate; 6, groove a; 7, groove b; 8, stepped groove; 9, part embedding groove; 10, three-jaw clamping section. Detailed Embodiments

[0019] Embodiment 1

[0020] As Figures 1-4 shown, a turning precision hole positioning and clamping tooling proposed by the utility model includes a support part 1. The support part 1 has an inverted T-shaped structure. The bottom surface of the horizontal section of the support part 1 has a curved surface, and stepped precision holes are provided on the vertical section. The precision holes form openings on the front and rear end faces of the support part 1; it also includes a cylindrical base body 3 and a pressing mechanism;

[0021] The cylindrical base 3 performs surface positioning on the front or rear end face of the support part 1, and at the same time performs surface positioning on the vertical section of the support part 1. The stepped precision hole is coaxial with the cylindrical base 3;

[0022] And a pressing mechanism is arranged on the cylindrical base 3 and can move up and down. The pressing mechanism is located below the support part 1. When the pressing mechanism moves upward, it abuts against the bottom surface of the support part 1 to realize the clamping of the support part 1, and when the pressing mechanism moves downward, the clamping state is released.

[0023] Embodiment 2

[0024] As Figure 2 shown, a turning precision hole positioning and clamping tooling proposed by the present utility model. Compared with Embodiment 1, the structure of the pressing mechanism is introduced in detail in this embodiment.

[0025] A part embedding groove 9 is arranged on the end face of the cylindrical base 3. The vertical section of the support part 1 is fitted and clamped into the part embedding groove 9. A groove a6 is arranged on the cylindrical base 3. The groove a6 communicates with the part embedding groove 9 and is located below the part embedding groove 9. One of the front side or the rear side of the support part 1 is in surface contact with the groove a6. A groove b7 is arranged on the cylindrical base 3. The groove b7 communicates with the groove a6 and is located below the groove a6. Compared with the groove a6, the groove b7 extends further into the cylindrical base 3 in the axial direction of the cylindrical base 3. The groove b7 and the groove a6 form a stepped groove 8; the pressing mechanism includes a bolt 4 and a pressing plate 5;

[0026] The bolt 4 has its top fitted and screwed into a threaded hole vertically arranged on the top wall of the groove b7. The bolt 4 can be provided with one or multiple. In an optional embodiment, two bolts 4 are provided;

[0027] And the pressing plate 5 is provided with a through hole for the rod part of the bolt 4 to pass through. The pressing plate 5 moves upward synchronously with the bolt 4. Finally, the pressing plate 5 abuts against both the bottom surface of the support part 1 and the top wall of the groove b7. In an optional embodiment, the pressing plate 5 is of a U-shaped structure, and the opening of the U-shaped groove of the U-shaped structure faces upward.

[0028] Embodiment 3

[0029] As Figure 2 and Figure 3 shown, a turning precision hole positioning and clamping tooling proposed by the present utility model. Compared with Embodiment 1 or Embodiment 2, this embodiment introduces how to machine the stepped precision hole by turning.

[0030] After the support part 1 is clamped, the stepped precision hole is machined by turning. Specifically, a three-jaw clamping section 10 is arranged coaxially on the cylindrical base body 3, and the lathe three-jaw 2 on the lathe clamps the three-jaw clamping section 10. In an optional embodiment, the three-jaw clamping section 10 and the cylindrical base body 3 are integrally arranged, and the diameter of the three-jaw clamping section 10 is smaller than that of the cylindrical base body 3. After the lathe clamps the cylindrical base body 3, it drives the cylindrical base body 3 to rotate, thereby driving the support part 1 to rotate, and then the stepped precision hole can be machined by the lathe tool of the lathe.

[0031] In summary, when the present utility model is in use, first, the support part 1 is surface-positioned through the part embedding groove 9 and the groove a6 on the cylindrical base body 3, and then the bolt 4 passes through the hole of the pressing plate 5 and the bolt 4 is tightened to drive the pressing plate 5 to move so as to press the support part 1, realizing the clamping of the support part 1 on the cylindrical base body 3. At this time, the center of the stepped precision hole of the support part 1 is coaxial with the outer circle of the cylindrical base body 3. Then, the lathe three-jaw 2 clamps the three-jaw clamping section 10, and after tool setting, the machining of the precision stepped hole can be started. The precision stepped hole is machined into a finished product in one operation at the same station, effectively ensuring the coaxiality and the hole dimension accuracy requirements. After the machining is completed, the part is taken off and inspected for delivery. The present utility model can realize the rapid positioning and clamping of the precision stepped hole of the support part 1, greatly improving the positioning and clamping efficiency of the part; and changing the traditional boring machining to turning machining not only ensures that each stepped hole is machined into a finished product in one operation and the coaxiality is guaranteed, but also greatly improves the batch production efficiency of the part; in addition, the overall structure of the tooling design is simple, the application principle is easy to understand, fully considering the problems of low actual batch production efficiency, difficult clamping and difficult positioning, etc., the operation and maintenance of the worker are convenient and fast, the production effect is obvious, and the batch production processing benefit is good.

[0032] The embodiments of the present utility model have been described in detail above with reference to the drawings, but the present utility model is not limited thereto. Various changes can be made without departing from the gist of the present utility model within the knowledge scope of those skilled in the art to which the present utility model pertains.

Claims

1. A turning precision hole positioning and clamping tool, comprising a support part (1), the support part (1) is an inverted T-shaped structure, the bottom surface of the horizontal section of the support part (1) has a curved surface, and a stepped precision hole is provided on the vertical section, and the precision hole is formed on both the front and rear end surfaces of the support part (1); characterized in that: Also includes: The cylindrical base (3) performs surface positioning on the front or rear end surface of the support part (1) and simultaneously performs surface positioning on the vertical section of the support part (1), and the stepped precision hole is coaxial with the cylindrical base (3); and a clamping mechanism, which is arranged on the cylindrical base (3) and can move up and down. The clamping mechanism is located below the support part (1). The clamping mechanism moves upward to press against the bottom surface of the support part (1) to achieve clamping of the support part (1). The clamping mechanism moves downward to release the clamping state.

2. The turning precision hole positioning and clamping tool according to claim 1 is characterized in that: After the support part (1) is clamped, a stepped precision hole is machined by turning.

3. The turning precision hole positioning and clamping tool according to claim 2 is characterized in that: A coaxial three-jaw clamping section (10) is arranged on the cylindrical base (3), and three lathe jaws (2) on the lathe clamp the three-jaw clamping section (10).

4. The turning precision hole positioning and clamping tool according to claim 1 is characterized in that: A part embedding groove (9) is provided on the end surface of the cylindrical base (3), and the vertical section of the support part (1) is fitted into the part embedding groove (9). A groove a (6) is provided on the cylindrical base (3), and the groove a (6) is connected to the part embedding groove (9) and is located below the part embedding groove (9). One of the front side surface or the rear side surface of the support part (1) is in surface contact with the groove a (6).

5. The turning precision hole positioning and clamping tool according to claim 4 is characterized in that: A groove b (7) is provided on the cylindrical base (3), the groove b (7) is connected to the groove a (6) and is located below the groove a (6), and compared with the groove a (6), the groove b (7) continues to extend into the cylindrical base (3) in the axial direction of the cylindrical base (3), and the groove b (7) and the groove a (6) form a stepped groove (8); the clamping mechanism comprises: The top of the bolt (4) is screwed into a threaded hole vertically arranged on the top groove wall of the groove b (7); And a pressure plate (5), the pressure plate (5) is provided with a through hole for the rod of the bolt (4) to pass through, the pressure plate (5) moves upward synchronously with the bolt (4), and finally the pressure plate (5) simultaneously abuts against the bottom surface of the support part (1) and the top groove wall of the groove b (7).

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