Lathe fixture for machining special-shaped parts

Abstract

A lathe fixture for machining special-shaped parts comprises a positioning part and a clamping part. One end of the positioning part is connected with a lathe four-jaw chuck, and the other end of the positioning part is matched with a part for positioning through a positioning end face and a positioning outer circle. The clamping part comprises a first semi-arc pressing plate, a second semi-arc pressing plate, two connecting screws and four fastening bolts, the first semi-arc pressing plate and the second semi-arc pressing plate are fixed to the special-shaped part through the two connecting screws, and then the special-shaped part is fixed to the clamp positioning part through the four fastening bolts. The problem that the special-shaped part is difficult to clamp in the machining process is solved, and rapid clamping, rapid alignment, high-quality and high-efficiency machining of the special-shaped part are achieved.

Description

Technical Field

[0001] The invention relates to a lathe clamp used for machining special-shaped parts, belonging to the technical field of mechanical machining. Background Art

[0002] For the processing of irregular and asymmetrical special-shaped parts, if the traditional four-jaw chuck is used for direct clamping, there are many disadvantages such as difficult clamping, difficult alignment, and part deformation. The product quality and production efficiency cannot be guaranteed, and it is no longer suitable for high-quality and high-efficiency refined production mode. Based on this, it is urgent for technicians in this field to provide a lathe fixture for processing special-shaped parts to solve the above problems. Summary of the invention

[0003] The technical problem solved by the invention is: to overcome the deficiencies of the prior art and to provide a lathe clamp for machining special-shaped parts, so as to realize fast clamping and fast alignment of special-shaped parts.

[0004] The technical solution of the present invention is:

[0005] A lathe fixture for machining special-shaped parts, comprising a positioning part and a clamping part;

[0006] One end of the positioning part is connected to the four-jaw chuck of the lathe, and the other end is positioned with the special-shaped part through the positioning end face and the positioning outer circle; the clamping part includes a first semi-circular arc pressure plate, a second semi-circular arc pressure plate, two connecting screws and four fastening bolts. The first semi-circular arc pressure plate and the second semi-circular arc pressure plate are clamped and fixed on the special-shaped part through the two connecting screws, and then the special-shaped part is fixed on the fixture positioning part through the four fastening bolts.

[0007] Furthermore,

[0008] The positioning part includes a cylindrical section, a flange section and a stage section. The cylindrical section is connected to the four-jaw chuck of the lathe, the flange section plane contacts and positions the plane of the special-shaped part, and the stage section outer circle contacts and positions the inner hole of the special-shaped part.

[0009] Furthermore, the flange section of the positioning part is provided with circumferentially evenly distributed through holes for fixing the special-shaped part on the positioning part by means of four fastening bolts.

[0010] Furthermore, the first semi-circular arc pressure plate and the second semi-circular arc pressure plate of the clamping part are provided with circumferentially uniformly distributed threaded holes for fixing the special-shaped part to the positioning part by four fastening bolts.

[0011] Furthermore, the first semicircular arc pressure plate and the second semicircular arc pressure plate of the clamping part are combined into an annular structure, and the inner surface of the combination is the same as the outer surface of the special-shaped part, so that the force is uniform when tightened and the clamping is stable.

[0012] Furthermore, two screw connection holes are provided at the butt joint surfaces of the first semi-circular arc pressure plate and the second semi-circular arc pressure plate of the clamping part, for connecting and fixing the first semi-circular arc pressure plate and the second semi-circular arc pressure plate by connecting screws.

[0013] Furthermore, the first semi-circular arc pressure plate and the second semi-circular arc pressure plate of the clamping part are provided with avoidance openings for avoiding the side mouths of special-shaped parts.

[0014] Furthermore, the outer circle of the stage of the positioning part is determined according to the size of the positioning inner hole of the special-shaped part.

[0015] Furthermore, the steps of using the lathe fixture to clamp special-shaped parts are as follows:

[0016] Step 1: Clamp the cylindrical segment of the positioning part on the four-jaw chuck of the lathe;

[0017] Step 2: fix the first semicircular arc pressure plate and the second semicircular arc pressure plate of the clamping part to the special-shaped part through two connecting screws;

[0018] Step 3: dock the clamping part and the special-shaped parts with the positioning part;

[0019] Step 4: Install four fastening bolts into the circumferentially evenly distributed threaded holes of the positioning part, the first semicircular arc pressure plate, and the second semicircular arc pressure plate, and tighten them.

[0020] The beneficial effects of the present invention compared with the prior art are:

[0021] (1) The lathe fixture for processing special-shaped parts of the present invention is easy to load and unload, and can be quickly aligned. For large-scale parts processing, it is only necessary to align the flange segment positioning end face and the stage segment positioning outer circle of the lathe fixture positioning part for the first time. Subsequent parts do not need to be aligned one by one. The clamping accuracy is guaranteed by the lathe fixture positioning part. It is only necessary to clamp the parts on the fixture and calibrate them with a dial indicator.

[0022] (2) The lathe fixture for processing special-shaped parts of the present invention has high positioning accuracy and good consistency of part dimensions. The clamping accuracy of the parts is guaranteed by the positioning part of the lathe fixture, and the positioning accuracy is high; the parts processed by the same lathe fixture after positioning and clamping have good consistency of dimensions. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a positive triaxial measurement drawing of the clamping relationship between the lathe fixture, the four-jaw chuck and the special-shaped parts of the present invention;

[0024] Figure 2 It is a cross-sectional view of the clamping relationship between the lathe fixture of the present invention and the special-shaped parts;

[0025] Figure 3It is the positive triaxial drawing of the assembly relationship of the lathe fixture of the present invention;

[0026] Figure 4 This is the structural diagram of the positioning part;

[0027] Figure 5 is a structural diagram of the first semicircular arc pressure plate;

[0028] Figure 6 It is the structural diagram of the second semicircular arc pressure plate;

[0029] Figure 7 It is the structural diagram of the connecting screw;

[0030] Figure 8 This is a structural diagram of the tightening bolts.

[0031] Among them: 1. positioning part, 2. first semicircular arc pressure plate, 3. second semicircular arc pressure plate, 4. connecting screws, 5. fastening bolts. DETAILED DESCRIPTION

[0032] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0033] The present invention is introduced by taking the processing of a certain special-shaped part as an example:

[0034] like Figure 1 , 2 As shown in Figures 3 and 4, the present invention proposes a lathe fixture for processing special-shaped parts, including a positioning part 1 and a clamping part. One end of the positioning part 1 is connected to the four-jaw chuck of the lathe, and the other end is positioned with the special-shaped part through the positioning end face and the positioning outer circle; the clamping part includes a first semi-circular arc pressure plate 2, a second semi-circular arc pressure plate 3, two connecting screws 4 and four fastening bolts 5. The first semi-circular arc pressure plate 2 and the second semi-circular arc pressure plate 3 are fixed to the special-shaped part through the two connecting screws 4, and then the special-shaped part is fixed to the fixture positioning part 1 through the four fastening bolts 5. The connecting screws 4 and the fastening bolts 5 are as shown Figure 7 and 8 shown.

[0035] like Figure 4 As shown, the positioning part 1 includes a cylindrical section 11, a flange section 12 and a stage section 13. The cylindrical section is connected to the four-jaw chuck of the lathe, the plane of the flange section contacts and positions the plane of the special-shaped part (corresponding to the positioning end face), and the outer circle of the stage section contacts and positions the inner hole of the special-shaped part (corresponding to the positioning outer circle). At the same time, the flange section is provided with circumferentially evenly distributed through holes, which are used to fix the special-shaped part on the positioning part 1 through four fastening bolts 5. The outer circle of the stage section of the positioning part is determined according to the size of the positioning inner hole of the special-shaped part.

[0036] like Figure 5 , 6As shown, the clamping part includes a first semicircular arc pressure plate 2, a second semicircular arc pressure plate 3, two connecting screws 4 and four fastening bolts 5. Among them, the two connecting screws 4 are used to fix the first semicircular arc pressure plate 2 and the second semicircular arc pressure plate 3 on the special-shaped part, and the four fastening bolts 5 are used to fix the special-shaped part on the fixture positioning part 1. At the same time, the first semicircular arc pressure plate 2 and the second semicircular arc pressure plate 3 are provided with circumferentially uniformly distributed threaded holes; the inner profile of the first semicircular arc pressure plate 2 and the second semicircular arc pressure plate 3 needs to be the same as the clamping outer profile of the special-shaped part; the first semicircular arc pressure plate 2 and the second semicircular arc pressure plate 3 need to be provided with an avoidance opening to avoid the side mouth of the special-shaped part, so that the first semicircular arc pressure plate 2 and the second semicircular arc pressure plate 3 can be clamped on the special-shaped part.

[0037] The specific clamping steps are as follows:

[0038] Step 1: Clamp the cylindrical section of the positioning part 1 on the four-jaw chuck of the lathe.

[0039] Step 2: Fix the first semicircular arc pressure plate 2 and the second semicircular arc pressure plate 3 of the clamping part to the special-shaped part through two connecting screws 4.

[0040] Step 3: dock the clamping part and the special-shaped part with the positioning part 1.

[0041] Step 4: Install four fastening bolts 5 into the circumferentially uniformly distributed threaded holes of the positioning part 1, the first semicircular arc pressure plate 2, and the second semicircular arc pressure plate 3, and tighten them.

[0042] The invention solves the problem of difficult clamping of special-shaped parts during mechanical processing, and realizes fast clamping, fast alignment, high-quality and high-efficiency processing of special-shaped parts.

[0043] Parts of the present invention that are not described in detail belong to common knowledge among those skilled in the art.

Claims

1. A lathe fixture for processing special-shaped parts, characterized in that: It comprises a positioning part (1) and a clamping part; One end of the positioning part (1) is connected to the four-jaw chuck of the lathe, and the other end is positioned with the special-shaped part through the positioning end face and the positioning outer circle; the clamping part includes a first semi-circular arc pressure plate (2), a second semi-circular arc pressure plate (3), two connecting screws (4) and four fastening bolts (5), and the first semi-circular arc pressure plate (2) and the second semi-circular arc pressure plate (3) are clamped and fixed on the special-shaped part through the two connecting screws (4), and then the special-shaped part is fixed on the fixture positioning part (1) through the four fastening bolts (5).

2. A lathe fixture for machining special-shaped parts according to claim 1, characterized in that: The positioning part (1) comprises a cylindrical section (11), a flange section (12) and a stage section (13); the cylindrical section (11) is connected to a four-jaw chuck of a lathe; the plane of the flange section (12) contacts with the plane of a special-shaped part for positioning; and the outer circle of the stage section (13) contacts with the inner hole of the special-shaped part for positioning.

3. The lathe fixture for processing special-shaped parts according to claim 1, characterized in that: The flange section (12) of the positioning part (1) is provided with circumferentially evenly distributed through holes for fixing the special-shaped part on the positioning part (1) via four fastening bolts (5).

4. The lathe fixture for machining special-shaped parts according to claim 1, characterized in that: The first semicircular arc pressure plate (2) and the second semicircular arc pressure plate (3) of the clamping part are provided with circumferentially evenly distributed threaded holes for fixing the special-shaped part on the positioning part (1) through four fastening bolts (5).

5. The lathe fixture for processing special-shaped parts according to claim 1, characterized in that: The first semicircular arc pressure plate (2) and the second semicircular arc pressure plate (3) of the clamping part are combined into an annular structure, the inner surface of the combined body is the same as the outer surface of the special-shaped part, the force is evenly applied when tightened, and the clamping is stable.

6. The lathe fixture for machining special-shaped parts according to claim 1, characterized in that: Two screw connection holes are provided at the butt joint surfaces of the first semi-circular arc pressure plate (2) and the second semi-circular arc pressure plate (3) of the clamping part, and are used to connect and fix the first semi-circular arc pressure plate (2) and the second semi-circular arc pressure plate (3) via connection screws (4).

7. The lathe fixture for machining special-shaped parts according to claim 1, characterized in that: The first semicircular arc pressing plate (2) and the second semicircular arc pressing plate (3) of the clamping part are provided with avoidance openings for avoiding the side mouths of special-shaped parts.

8. The lathe fixture for machining special-shaped parts according to claim 1, characterized in that: The outer circle of the stage of the positioning part is determined according to the size of the positioning inner hole of the special-shaped part.

9. The lathe fixture for machining special-shaped parts according to claim 1, characterized in that: The steps for clamping special-shaped parts using this lathe fixture are as follows: Step 1: Clamp the cylindrical section of the positioning part (1) on the four-jaw chuck of the lathe; Step 2: fix the first semicircular arc pressure plate (2) and the second semicircular arc pressure plate (3) of the clamping part to the special-shaped part by two connecting screws (4); Step 3: dock the clamping part and the special-shaped part with the positioning part (1); Step 4: Install four fastening bolts (5) into the circumferentially evenly distributed threaded holes of the positioning part (1), the first semicircular arc pressure plate (2), and the second semicircular arc pressure plate (3), and tighten them to secure.

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