Lathe machining device applied to rough machining of piston

Abstract

The utility model relates to the technical field of casting piston machining, in particular to a lathe machining device applied to piston rough machining. The device comprises a linking disc and a profiling main body which is arranged on the linking disc and is used for being matched with the installation of a piston, the profiling device comprises a profiling body, a protruding block arranged in the middle of the top of the profiling body, a floating limiting assembly arranged on the protruding block, four sets of positioning pins arranged on the periphery of the top of the profiling body and with the protruding block as the center, and adjusting positioning blocks arranged on the periphery of the bottom of the profiling body. The pull rod penetrates through the bottom of the profiling main body and is arranged in the profiling main body, and the movable rod penetrates through the pull rod. According to the technical scheme, the adjusting and positioning blocks in four directions are arranged on the main body, the inclined plane is arranged on the main body, the size is adjusted, the adjusting and positioning blocks adapt to the size of an inner cavity of a workpiece blank and are adjusted to the minimum gap, the floating limiting assembly can float up and down to position an inner circle boss of the workpiece, and the coaxiality of products is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of piston casting technology, and in particular to a lathe machining device for roughing pistons. Background Technology

[0002] Existing technology, reference Figure 4 The diagram shows the structure of the piston that needs to be machined. Due to its irregular internal cavity and small cutting space, a special four-jaw chuck is required for positioning. Changing the line is troublesome, and there are many parts to replace the jaws, which increases the preparation and replacement time. Moreover, the replacement jaws need to be designed to be very thin due to the limited internal space, which affects the clamping rigidity and reduces the cutting efficiency.

[0003] Therefore, it is necessary to design a lathe machining device for roughing pistons to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a lathe machining device for roughing pistons, so as to overcome the above-mentioned shortcomings of the existing technology.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A lathe machining apparatus for roughing pistons includes a connecting plate and a contouring body mounted on the connecting plate for mounting the piston. The apparatus is characterized by: a protrusion at the top center of the contouring body; a floating limiting component mounted on the protrusion; four sets of positioning pins respectively disposed around the top of the contouring body and centered on the protrusion; adjusting positioning blocks disposed around the bottom of the contouring body; a pull rod penetrating the bottom of the contouring body and placed within it; and a movable rod penetrating the pull rod.

[0007] Preferably, the floating limit assembly includes a mounting block bolted onto the protrusion and a T-shaped block placed inside the mounting block by a spring. One end of the spring is placed on the inner wall of the mounting block, and the other end is connected to the T-shaped block. The T-shaped block can move up and down along the mounting block, and the top of the T-shaped block has a groove for conforming to the protrusion inside the piston.

[0008] Preferably, a waist-shaped hole is provided on the side of the T-shaped block, and a limiting post is provided on the side of the mounting block, with part of the limiting post placed inside the waist-shaped hole.

[0009] Preferably, the adjustment positioning blocks are respectively disposed around the contouring body, and mounting grooves for mounting the adjustment positioning blocks are provided around the contouring body, and the groove surfaces of the mounting grooves are inclined.

[0010] Preferably, the contoured body has a hole or groove, and the pull rod has a through groove for mounting the movable rod. The hole or groove communicates with the through groove, and the movable rod can be movably placed in both the hole or groove and the through groove.

[0011] The beneficial effects of this utility model are as follows: This technical solution has four adjustment and positioning blocks on the main body. By adjusting the size of the inclined surface on the main body, it can adapt to the size of the inner cavity of the workpiece blank and adjust to the minimum gap. The floating limit component can float up and down to position the inner circle boss of the workpiece, ensuring the coaxiality of the product is 0.06mm. This utility model is easy to clamp, has a large tension force, and can be directly used through the transmission of the pull rod. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a lathe machining device for roughing pistons according to the present invention;

[0013] Figure 2 This is a cross-sectional view of a lathe machining apparatus for roughing pistons according to the present invention;

[0014] Figure 3 This is a partial schematic diagram of a lathe machining device for roughing pistons according to the present invention;

[0015] Figure 4 This is a schematic diagram of the internal structure of a piston product;

[0016] In the diagram: 1. Connecting disc; 2. Contouring body; 3. Protrusion; 4. Positioning pin; 5. Adjusting positioning block; 6. Pull rod; 7. Movable rod; 8. Mounting block; 9. Spring; 10. Groove; 11. Waist-shaped hole; 12. Limiting post; 13. T-block; 51. Mounting groove; 21. Hole groove; 22. Through groove. Detailed Implementation

[0017] Reference Figures 1 to 3 A lathe machining apparatus for roughing pistons includes a connecting plate 1, a contouring body 2 mounted on the connecting plate for mounting the piston, a protrusion 3 located at the top center of the contouring body, a floating limiting component mounted on the protrusion, four sets of positioning pins 4 respectively located around the top of the contouring body and centered on the protrusion, adjusting positioning blocks 5 located around the bottom of the contouring body, a pull rod 6 passing through the bottom of the contouring body and placed inside the contouring body, and a movable rod 7 passing through the pull rod.

[0018] The positioning pins 4 are used to support the four sides of the internal groove of the piston, and the four sets support the entire internal groove.

[0019] The floating limit assembly includes a mounting block 8 bolted to the protrusion and a T-shaped block 13 placed inside the mounting block by a spring 9. One end of the spring is placed on the inner wall of the mounting block, and the other end is connected to the T-shaped block. The T-shaped block can move up and down along the mounting block, and the top of the T-shaped block has a groove 10 that matches the protrusion inside the piston for contour mounting.

[0020] In order to limit the range of movement of the T-block, a waist-shaped hole 11 is provided on the side of the T-block, and a limiting post 12 is provided on the side of the mounting block, with part of the limiting post placed in the waist-shaped hole. The limiting post can move along the waist-shaped hole and is stuck when it moves to the end, thereby achieving the limitation.

[0021] The adjusting positioning blocks 5 are respectively disposed around the contouring body 2. Mounting grooves 51 are formed around the contouring body 2 to accommodate the adjusting positioning blocks 5, and the groove surfaces of the mounting grooves are inclined. The adjusting positioning blocks 5 are used to support and position the piston by matching the inner diameter of the piston bottom surface. The adjusting positioning blocks 5 can be adjusted along the inclined surface, thereby adjusting the amount of the adjusting positioning blocks placed on the outer side, thus adjusting the size of the outer diameter of the positioning, and thus limiting the movement of pistons of different sizes.

[0022] To help limit the piston as a whole, the contoured body 2 has a hole 21 and the pull rod has a through groove 22 for mounting the movable rod. The hole and the through groove are connected. The movable rod can be placed in both the hole and the through groove. The pull rod moves up and down, which drives the movable rod to move up and down, thereby fixing the piston.

[0023] refer to Figure 4 The diagram shows a piston structure. The piston has a movable inner cavity with a protrusion at the top and grooves on both sides. The bottom is a circular structure, which is complex and requires multiple limiting components for positioning during machining. In this embodiment, the piston is fitted onto the contoured body 2 from the top. The floating limiting components inside the piston first contact the protrusion inside the piston. The top groove of the T-shaped block is installed with the protrusion and is pressed down. At the same time, the positioning pins 4 are placed around the piston groove for positioning. The position of the holes on both sides of the piston is adjusted to be on the same axis as the through hole and through groove 22. Meanwhile, the bottom adjusting positioning block supports the circular bottom of the piston and supports it outward for positioning. The initial positioning is completed. The movable rod 7 is inserted into the hole groove 21 and through groove 22. The pull rod is pulled down, causing the movable rod 7 to move downward. The movable rod 7 presses against the grooves on both sides of the piston and is pressed and fixed, completing the positioning.

[0024] The advantages of this utility model are that the main body is provided with adjustment and positioning blocks in four directions. The size of the inclined surface on the main body can be adjusted to adapt to the size of the inner cavity of the workpiece blank and adjust to the minimum gap. The floating limit component can float up and down to position the inner circle boss of the workpiece, ensuring the coaxiality of the product is 0.06mm. This utility model is easy to clamp, has a large tension force, and can be directly used through the transmission of the pull rod.

[0025] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A lathe machining apparatus for roughing pistons, comprising a connecting plate and a contouring body disposed on the connecting plate for mounting the piston, characterized in that: A protrusion located at the top center of the contouring body, a floating limiting component located on the protrusion, four sets of positioning pins located around the top of the contouring body with the protrusion as the center, an adjustment positioning block located around the bottom of the contouring body, a pull rod extending from the bottom of the contouring body and placed inside the contouring body, and a movable rod extending through the pull rod.

2. The lathe machining apparatus for roughing pistons according to claim 1, characterized in that: The floating limit assembly includes a mounting block bolted onto the protrusion and a T-shaped block placed inside the mounting block by a spring. One end of the spring is placed on the inner wall of the mounting block, and the other end is connected to the T-shaped block. The T-shaped block can move up and down along the mounting block, and the top of the T-shaped block has a groove for conforming to the protrusion inside the piston.

3. A lathe machining apparatus for roughing pistons according to claim 2, characterized in that: A waist-shaped hole is provided on the side of the T-block, and a limiting post is provided on the side of the mounting block, with part of the limiting post placed inside the waist-shaped hole.

4. A lathe machining apparatus for roughing pistons according to claim 1, characterized in that: The adjustment and positioning blocks are respectively arranged around the contouring body. The contouring body has mounting grooves around it to accommodate the adjustment and positioning blocks, and the groove surfaces are inclined.

5. A lathe machining apparatus for roughing pistons according to claim 1, characterized in that: The contoured body has a hole or groove, and the pull rod has a through groove for mounting the movable rod. The hole or groove communicates with the through groove, and the movable rod can be moved and placed in both the hole or groove and the through groove.

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