Multi-station main cylinder centering clamp

Abstract

The utility model discloses a multi-station main cylinder centering clamp which comprises a main fixing plate, at least one centering clamping device is arranged on the main fixing plate, the centering clamping device comprises a clamping air cylinder, a fixed profiling clamping block and a floating clamping block assembly are oppositely arranged on a clamping head of the clamping air cylinder, and the floating clamping block assembly is arranged on the clamping head of the clamping air cylinder. The floating clamping block assembly comprises a positioning block and a floating block, the floating block comprises a profiling groove and a cylindrical block, the cylindrical block is vertically inserted into the cylindrical groove, the cylindrical block and the side wall of the cylindrical groove are provided with the inclination opposite to the drawing inclination of the workpiece, a gap is formed between the cylindrical block and the top of the cylindrical groove, and the positioning block is arranged in the profiling groove. A gap is formed between the cylindrical block and the cylindrical groove, an elastic ring is arranged in the gap, the cylindrical block floats in the cylindrical groove for a small distance, by arranging the floating block, when a workpiece is positioned, the whole workpiece can be prevented from being jacked up when a drawing slope of the workpiece is clamped, and meanwhile, an edge pressing assembly is arranged, so that a product can be more stably positioned.

Description

Technical Field

[0001] The utility model relates to the field of machine tool fixtures, in particular to a multi-station main cylinder centering fixture. Background Art

[0002] During machine tool processing, the stability of part clamping is extremely important and ultimately determines the stability of part processing. Figure 1 , Figure 2 The parts described above have a drawing slope in the cylindrical part due to the special-shaped product structure, and a protruding inclined protrusion is provided on the side. The general machine tool fixture uses the jaws to clamp the cylindrical part with relative force, or uses a three-jaw fixture to clamp the edge of the cylindrical part. However, due to the drawing slope of the cylindrical part (the slope is very small), the fixed jaws are pressed, and the part will be slightly lifted during processing, causing the bottom of the part to be suspended during processing, which is easy to be damaged during processing, or the processing accuracy is inaccurate. Utility Model Content

[0003] In order to solve the above technical problems, the utility model discloses a multi-station main cylinder centering fixture, including a main fixed plate, on which at least one centering clamping device is provided, the centering clamping device includes a clamping cylinder, on the clamping head of the clamping cylinder are relatively provided a fixed profiling clamping block and a floating clamping block assembly, the floating clamping block assembly includes

[0004] A positioning block and a floating block, wherein the positioning block is provided with a protrusion, and the protrusion is provided with a vertical cylindrical groove. The floating block includes a contoured groove and a cylindrical block, and the cylindrical block is vertically inserted into the cylindrical groove. A stop block is provided below the protrusion, and the stop block is used to limit the movement of the cylindrical block. The cylindrical block and the side wall of the cylindrical groove are provided with an inclination opposite to the drawing inclination of the workpiece. A gap is provided between the cylindrical block and the top of the cylindrical groove, and an elastic ring is provided in the gap. A pressure plate is provided above the elastic ring, and the cylindrical block floats a small distance in the cylindrical groove.

[0005] Preferably, the centering clamping device includes 8 groups, which are divided into two groups and arranged on two surfaces of the main fixing plate.

[0006] Preferably, the fixed profiling clamp block and the profiling groove comprise a semicircular groove body, and the inner wall of the semicircular groove body is provided with four positioning points arranged up and down, and the bottom positioning point protrudes beyond the top positioning point.

[0007] Preferably, the elastic ring is a U-shaped structure, pressed on the top of the columnar block.

[0008] Preferably, an edge clamping assembly is provided on the side of the centering clamping device, and the edge clamping assembly includes a base, a fixed block and a push-pull cylinder are provided on the base, the fixed block is pressed on the side of the fixed contour clamping block, a support block is provided on the base, a swing arm is provided on the support block and is connected to the support block via a rotating shaft, one end of the swing arm is connected to the output end of the push-pull cylinder, and the other end is connected to a movable clamping block via a rotating pin, the movable clamping block is pressed between the base and the floating clamping block assembly and aligned with the fixed block, and the movable clamping block clamps the protruding edge of the workpiece when it is close to the fixed block.

[0009] Preferably, the movable pressing block is slidably connected to the side wall of the supporting block via a slide rail and slide groove structure.

[0010] Preferably, a cushion block is provided at the lower portion of the fixed contour clamp block and floating clamp block assembly.

[0011] The multi-station main cylinder centering clamp proposed by the utility model has the following beneficial effects: by setting a floating block, when positioning the workpiece, it can prevent the drawing slope of the workpiece from causing the entire workpiece to be lifted up when being clamped. At the same time, an edge clamping component is set, which can position the product more stably and improve processing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for describing the embodiments.

[0013] Figure 1 is a side view of the workpiece;

[0014] Figure 2 A three-dimensional image of the workpiece;

[0015] Figure 3 It is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 4 It is a schematic diagram of the centering clamping device of the utility model;

[0017] Figure 5 It is a schematic diagram of the edge pressing assembly of the utility model;

[0018] Figure 6 It is a schematic diagram of the floating clamp block assembly of the utility model;

[0019] Figure 7 It is a schematic diagram of the positioning block of the utility model;

[0020] Among them, 1. main fixed plate; 2. centering clamping device; 3. clamping cylinder; 4. fixed contour clamping block; 5. floating clamping block assembly; 6. positioning block; 7. floating block; 8. protrusion; 9. cylindrical groove; 10. cylindrical block; 11. stopper; 12. gap; 13. pressure plate; 14. semicircular groove body; 15. positioning point; 16. edge clamping assembly; 17. base fixing block; 18. fixed block; 19. push-pull cylinder; 20. movable clamping block; 21. support block; 22. rotating shaft; 23. swing arm; 24. rotating pin; 25. slide rail; 26. pad. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0022] like Figure 3 As shown, the utility model discloses a multi-station master cylinder centering fixture, including a main fixed plate 1, on which at least one centering clamping device 2 is provided, and 8 groups of centering clamping devices 2 can be provided, but the number is certainly not limited to 8 groups, and can be provided as required, but the number and weight of the two surfaces must be kept the same to prevent eccentric force from being generated during rotation, and they are respectively provided on the two surfaces of the fixed plate. During processing, the end of the main fixed plate 1 is fixed on the main shaft of the machine tool, and is driven to rotate by the machine tool, and the product fixed by the centering clamping device 2 is processed by the tool, specifically:

[0023] like Figure 4 As shown, the centering clamping device 2 includes a clamping cylinder 3, which is a purchased part. The clamping cylinder 3 realizes the clamping of two groups of clamping heads by air intake. The clamping simultaneously realizes the centering problem of the columnar part. The clamping heads of the clamping cylinder 3 are relatively provided with a fixed profiling clamping block 4 and a floating clamping block assembly 5. The floating clamping block assembly 5 includes

[0024] The positioning block 6 and the floating block 7 are provided with a protrusion 8 on the positioning block 6, and a vertical cylindrical groove 9 is provided on the protrusion 8. The floating block 7 includes a profiling groove and a cylindrical block 10. The cylindrical block 10 is vertically inserted into the cylindrical groove 9. A stopper 11 is provided below the protrusion 8. The stopper 11 is used to limit the movement of the cylindrical block 10. The side walls of the cylindrical block 10 and the cylindrical groove 9 are provided with an inclination opposite to the drawing inclination of the workpiece. The cylindrical block 10 can float up and down in the cylindrical groove 9. A gap 12 is provided between the cylindrical block 10 and the top of the cylindrical groove 9. An elastic ring (not shown in the figure) is provided in the gap 12. A pressure plate 13 is provided above the elastic ring. The elastic ring is a U-shaped structure, which is pressed on the top of the cylindrical block 10. When clamped, the floating The contoured groove of block 7 is pressed against the lower part of the workpiece, and the floating block 7 is pressed against the workpiece. Since the side wall of the workpiece has a movable drawing slope, when the workpiece is clamped, the workpiece will move slightly upward. At this time, the friction between the floating block 7 and the workpiece is greater than the friction between the columnar block 10 and the columnar groove 9 of the floating block 7, so the floating block 7 will be driven to have an upward force and squeeze the elastic member. Since the side walls of the columnar block 10 and the columnar groove 9 are provided with a very small slope, about 5 wires, and opposite to the drawing slope of the workpiece, when the workpiece has an upward floating force, the columnar block 10 will be pressed with a downward force to continuously press the workpiece downward to prevent the workpiece from moving upward, thereby ensuring the stability of the workpiece clamping and solving the problem of the original fixed jaw method in which the bottom of the workpiece is suspended after clamping.

[0025] Among them, Figure 6 As shown, the fixed profiling clamp 4 and the profiling groove include a semicircular groove body 14, and four positioning points 15 are arranged on the upper and lower inner walls of the semicircular groove body 14. The bottom positioning point 15 protrudes from the top positioning point 15. When the clamping cylinder 3 is clamped, the positioning point 15 is pressed against the side wall of the product, and the point positioning has better stability.

[0026] Since the product is an irregular columnar structure, a protrusion 8 is also provided on the side. An edge clamping assembly 16 is provided on the side of the centering clamping device 2. The edge clamping assembly 16 includes a base. A fixed block 18 and a push-pull cylinder 19 are provided on the base. The fixed block 18 is pressed on the side of the fixed profiling clamping block 4. A support block 21 is provided on the base. A swing arm 23 is connected to the support block 21 through a rotating shaft 22. One end of the swing arm 23 is connected to the output end of the push-pull cylinder 19, and the other end is connected to a movable clamping block 20 through a rotating pin 24. The movable clamping block 20 is pressed on the side of the fixed profiling clamping block 4. The base and the floating clamping block assembly 5 are arranged between the base and the floating clamping block assembly 5 and are aligned with the fixed block 18. When the movable clamping block is close to the fixed block 18, it clamps the edge protrusion 8 of the workpiece. The drawing cylinder is laterally arranged. The drawing cylinder extends out to drive the swing arm 23 to rotate along the rotating shaft 22. A rotating pin 24 is provided on the side connected to the movable clamping block 20 to ensure the movement between the swing arm 23 and the movable clamping block 20. The movable clamping block is slidably connected to the side wall of the support block 21 through the slide groove structure of the slide rail 25, and can slide horizontally along the slide rail 25 and cooperate with the fixed block 18 to clamp the protrusion 8 of the product to achieve fixation.

[0027] A cushion block 26 is provided at the bottom of the fixed profiling clamp block 4 and the floating clamp block assembly 5 to ensure the stability of the product.

Claims

1. A multi-station master cylinder centering fixture, characterized in that: It includes a main fixing plate, on which at least one centering clamping device is provided, the centering clamping device includes a clamping cylinder, on the clamping head of the clamping cylinder are relatively provided a fixed profiling clamping block and a floating clamping block assembly, the floating clamping block assembly includes A positioning block and a floating block, wherein the positioning block is provided with a protrusion, and the protrusion is provided with a vertical cylindrical groove. The floating block includes a contoured groove and a cylindrical block, and the cylindrical block is vertically inserted into the cylindrical groove. A stop block is provided below the protrusion, and the stop block is used to limit the movement of the cylindrical block. The cylindrical block and the side wall of the cylindrical groove are provided with an inclination opposite to the drawing inclination of the workpiece. A gap is provided between the cylindrical block and the top of the cylindrical groove, and an elastic ring is provided in the gap. A pressure plate is provided above the elastic ring, and the cylindrical block floats a small distance in the cylindrical groove.

2. The multi-position master cylinder centering fixture according to claim 1 is characterized in that: The centering clamping device includes 8 groups, which are divided into two groups and arranged on the two surfaces of the main fixing plate.

3. The multi-position master cylinder centering fixture according to claim 1 is characterized in that: The fixed profiling clamp block and the profiling groove comprise a semicircular groove body, and the inner wall of the semicircular groove body is provided with four positioning points arranged up and down, and the bottom positioning point protrudes from the top positioning point.

4. The multi-position master cylinder centering fixture according to claim 1 is characterized in that: The elastic ring is a U-shaped structure and is pressed on the top of the columnar block.

5. The multi-position master cylinder centering fixture according to claim 1 is characterized in that: An edge clamping assembly is provided on the side of the centering clamping device, and the edge clamping assembly includes a base, a fixed block and a push-pull cylinder are provided on the base, the fixed block is pressed on the side of the fixed contour clamping block, a supporting block is provided on the base, a swing arm is provided on the supporting block and is connected to the support block via a rotating shaft, one end of the swing arm is connected to the output end of the push-pull cylinder, and the other end is connected to a movable clamping block via a rotating pin, the movable clamping block is pressed between the base and the floating clamping block assembly and aligned with the fixed block, and the movable clamping block clamps the protruding edge of the workpiece when it is close to the fixed block.

6. The multi-position master cylinder centering fixture according to claim 5 is characterized in that: The movable pressing block is slidably connected to the side wall of the supporting block via a slide rail and slide groove structure.

7. The multi-position master cylinder centering fixture according to claim 1 is characterized in that: A cushion block is arranged at the lower part of the fixed contour clamp block and the floating clamp block assembly.

Images