CN103386619B - Rotation surface precision machining clamp with adjustable off-axis quantity - Google Patents

Abstract

The invention discloses a fixture for precise machining of a rotary curved surface with adjustable off-axis, wherein the guide groove on the V-shaped block can slide along the guide rail on the fixture bottom plate, and the T-shaped slider is movably connected with the T-shaped groove on the fixture bottom plate , the positioning pin is detachably connected in the T-shaped slider, and the cylindrical workpiece is detachably connected with the T-shaped slider through the positioning pin to realize its positioning on the fixture bottom plate. The V-shaped slider is equidistant from both sides of the fixture bottom plate Corresponding threaded holes in the threaded hole array are threaded to realize fixing to the bottom plate of the fixture. The fixture provided by the invention is suitable for cylindrical workpieces of different sizes, shapes, and different off-axis distances, solves the processing problem of workpieces with large off-axis distances, has good versatility, expands the processing space, and can also be installed at the same time. Clamp multiple workpieces to improve processing efficiency.

Description

A Fixture for Precision Machining of Revolving Surface with Adjustable Off-Axis Amount

technical field

The invention belongs to the technical field of machine tool fixtures, and in particular relates to a precision machining fixture for a curved surface of revolution with an adjustable off-axis amount.

Background technique

Cylindrical workpieces are often processed in the process of CNC machining, and the cylindrical blank needs to be clamped on the machine tool through a specific fixture. Through the review of existing fixture patents, it is found that in the existing ordinary machine tool fixtures, the fixture for clamping cylindrical workpieces can usually only be adjusted for different diameters of the workpiece, and the workpiece is usually clamped at the center of the spindle. The off-axis position cannot be adjusted arbitrarily, and it has no applicability to cylindrical workpieces whose diameter and off-axis amount can be adjusted; in addition, the use of circular vacuum suction cups in modern CNC machine tools is becoming more and more common, but its size is limited. The processing of workpieces with large off-axis has certain limitations, which requires the use of specific fixtures to expand the processing space of the machine tool. Therefore, it is particularly important to design a fixture that can realize both the adjustable diameter of the cylindrical workpiece and the adjustable off-axis distance of the workpiece.

Contents of the invention

The purpose of the present invention is to provide a rotary surface precision machining fixture with adjustable off-axis amount, so that the fixture can be adjusted for cylindrical workpieces with different diameters, shapes, and different off-axis amounts, and realize workpieces with different processing requirements. The clamping and manufacturing can further improve the versatility of the fixture and expand the processing space of CNC machine tools in precision machining.

In conjunction with the accompanying drawings, the present invention adopts the following technical solutions to realize:

A precision machining fixture for rotary curved surfaces with adjustable off-axis distance, which includes a fixture base, clamping screw I1, clamping screw II4, V-shaped block I5, cylindrical workpiece I6, V-shaped block II7, V-shaped block III10, Cylindrical workpiece Ⅱ11, V-shaped block Ⅳ12, clamping screw Ⅲ16, clamping screw Ⅳ18, clamping screw Ⅴ21, clamping screw Ⅵ23, clamping screw Ⅶ25, clamping screw Ⅷ27, positioning pin Ⅰ28, T-shaped slider Ⅰ29, T-shaped slider II 30 and positioning pin II 31; wherein the fixture base includes a fixture bottom plate 9, and the fixture bottom plate 9 is provided with positioning holes 32, guide rails 33, T-shaped slots 34, equidistant threaded hole arrays 35, and adsorption discs 36 , wherein V-shaped block Ⅰ5, V-shaped block Ⅱ7, V-shaped block Ⅲ10 and V-shaped block Ⅳ12 are provided with guide grooves that can slide along the guide rail 33 on the top of the fixture bottom plate, V-shaped block Ⅰ5, V-shaped block Ⅱ7, V-shaped block Type block III10 and V type block IV12 are both movably connected to the guide rail 33 on the top of the fixture base plate 9 through the guide grooves at the bottom of each; Movable connection; positioning pin I28 is detachably connected to the positioning hole on the T-shaped slider I29, and positioning pin II31 is detachably connected to the positioning hole on the T-shaped slider II30; the cylindrical workpiece I6 and the cylindrical workpiece II11 respectively pass through the bottom The positioning hole at the end is detachably connected with the positioning pin Ⅱ31 and the positioning pin Ⅰ28, and the positions of the cylindrical workpiece Ⅰ6 and the cylindrical workpiece Ⅱ11 can be adjusted by adjusting the positions of the T-shaped slider Ⅰ29 and the T-shaped slider Ⅱ30; the V-shaped block I5 passes through the clamp Tightening screw II4, clamping screw V21 are threadedly connected with the corresponding threaded holes in the equidistant threaded hole array on the fixture base plate 9; The corresponding threaded holes in the equidistant threaded hole array are threaded; the V-shaped block III10 is threaded with the corresponding threaded holes in the equidistant threaded hole array on the fixture base plate 9 through clamping screw IV18 and clamping screw VII25; The V-shaped block lV12 is screwed to the corresponding threaded holes in the equidistant threaded hole array on the fixture base plate 9 through the clamping screw III16 and VIII27; the V-shaped block I5 and the V-shaped block II7 are used for the clamping column Shaped workpiece I6, V-shaped block III10 and V-shaped block IV12 are used to clamp cylindrical workpiece II11.

According to the precision machining fixture of a rotary curved surface with adjustable off-axis amount provided by the present invention, the positions of V-shaped block I5, V-shaped block II7, V-shaped block III10, and V-shaped block IV12 on the fixture bottom plate 9 are respectively adjusted to make the workpiece It is precisely fixed at the position required by the processing; the fixing of the four V-shaped blocks on the bottom plate 9 of the fixture is realized by clamping screws. There are through grooves on both sides of V-shaped block Ⅰ5, V-shaped block Ⅱ7, V-shaped block Ⅲ10 and V-shaped block Ⅳ12. When any one of the block IV12 moves to any position, one or two threaded holes in the array of equidistant threaded holes on the side of the fixture base plate 9 are not completely blocked by the rounded rectangular slot.

According to the precision machining fixture of the rotary curved surface with adjustable off-axis amount provided by the present invention, the slots on both sides of V-shaped block I5, V-shaped block II7, V-shaped block III10 and V-shaped block IV12 can be rounded rectangular slots .

According to the precision machining jig with adjustable off-axis amount provided by the present invention, in the process of using the clamping screw for screw connection and clamping, in order to avoid the shaking of the clamping screw in the through groove, each clamping Gaskets are set between the screws and the corresponding V-shaped block slots, so that each clamping screw can be fastened with the V-shaped block and the clamp bottom plate 9 through the gasket, that is, the V-shaped block Ⅰ5 can be clamped by the clamps on both sides. The screw II4, the clamping screw V21 and the corresponding gasket I3 and the gasket V20 are screwed to the corresponding threaded holes in the equidistant threaded hole array 35 on the fixture bottom plate 9 to be fastened, and the V-shaped block II7 is tightened through the clamping screw I1, The clamping screw Ⅵ23 and the corresponding gaskets Ⅳ19 and Ⅵ22 are screwed to the bottom plate 9 of the fixture to be fastened, and the V-shaped block Ⅲ10 is connected to the fixture through the clamping screws Ⅳ18, the clamping screws Ⅶ25 and the corresponding gaskets Ⅲ17 and Ⅶ24. The bottom plate 9 is threaded and fastened, and the V-shaped block IV12 is fastened through the clamping screw III16, clamping screw VIII27 and the corresponding gaskets II15, VIII26 and the clamp bottom plate 9; thereby improving the clamping and clamping of the V-shaped block. The effect of fixing, and then realize the precise clamping and fixing of cylindrical workpiece Ⅰ6 and cylindrical workpiece Ⅱ11.

According to a fixture for precision machining of a curved surface of revolution with an adjustable off-axis distance provided by the present invention, the gaskets provided between each clamping screw and the through groove of the corresponding V-shaped block are rubber gaskets or spring gaskets.

According to the present invention, a precision machining fixture for rotary curved surfaces with adjustable off-axis distance also includes bolts I2, bolts II8, bolts III13 and bolts IV14, V-shaped block I5 and V-shaped block II7 are threaded through bolts I2 and bolts II8 , V-block Ⅲ10 and V-block Ⅳ12 are threaded through bolt Ⅲ13 and bolt Ⅳ14. Bolt Ⅰ2, bolt Ⅱ8, bolt Ⅲ13 and bolt Ⅳ14 are all hexagonal nuts in the middle, and the two sides are standard threads with opposite rotation directions. Simultaneously turn the two hex nuts in the middle of bolt I2 and bolt II8 to adjust the distance between V-block I5 and V-block II7 synchronously; Block II7 will be stuck and cannot be moved. This design can ensure that the position of the V-shaped block can be self-locked after the workpiece is accurately positioned, which further improves the machining accuracy; similarly, the distance between the V-shaped block III10 and the V-shaped block IV12 can also be adjusted. Through the synchronous adjustment of bolt III13 and bolt IV14, not only can the cylindrical workpiece I6 and cylindrical workpiece II11 be clamped, but also meet the requirement that the fixture can be adjusted and clamped for cylindrical workpieces of different diameters.

According to the precision machining fixture of a curved surface of revolution with adjustable off-axis amount provided by the present invention, the bottom plate 9 of the fixture is also provided with a measurement auxiliary line 37 and a baseline 38, the measurement auxiliary line 37 is parallel to the direction of the guide rail 33, and the baseline 38 passes through The center point of the fixture base is perpendicular to the measurement auxiliary line 37, and the distance from the center of the positioning hole on the T-slider I29 and T-slider II30 to the baseline 38 can be accurately measured through the measurement auxiliary line 37, which can further realize the workpiece in different positions. Precise positioning of off-axis positions.

According to the precision machining fixture of a curved surface of revolution with adjustable off-axis amount provided by the present invention, the back of the fixture bottom plate 9 is provided with an adsorption disc 36 with high flatness, and the positioning hole 32 at the center of the adsorption disc 36 is aligned with the center of the vacuum chuck of the machine tool. The positioning holes are pinned, and the adsorption disc 36 is adsorbed on the vacuum chuck of the CNC machine tool, thereby fixing the fixture provided by the present invention on the CNC machine tool, and completing the precise clamping of the workpiece for subsequent processing and manufacturing.

Compared with the prior art, the present invention has the advantages of:

1. The distance between each group of V-shaped blocks in the fixture can be adjusted, so cylindrical workpieces with different diameters can be clamped.

2. By adjusting the distance from the center of the positioning hole on the T-shaped slider to the baseline, the fixture can clamp cylindrical workpieces with different off-axis amounts, which solves the processing problem of workpieces with large off-axis amounts and expands the scope of CNC machining in precision machining. The processing space of the machine tool.

3. Traditional machine tool clamps can usually only clamp one workpiece. The clamp of the present invention adopts a symmetrical design and can simultaneously clamp two cylindrical workpieces with the same diameter, which improves the processing efficiency of the machine tool.

4. Adjust the off-axis amount of workpieces on both sides of the fixture after calculation. The fixture can not only clamp two workpieces with the same diameter, but also clamp two cylindrical workpieces with different diameters at the same time, which further improves the versatility of the fixture.

5. The V-shaped blocks are connected by bolts and threads, and the distance between the connected two V-shaped blocks can be adjusted precisely by turning the nut, so that the middle cylindrical workpiece can be clamped more firmly and the precision can be further improved.

Description of drawings

Figure 1 is a schematic diagram of the structure of a precision machining fixture with adjustable off-axis when clamping a cylindrical workpiece.

Figure 2 is a schematic diagram of the structure of a precision machining fixture for rotary curved surfaces with adjustable off-axis when the cylindrical workpiece is not clamped

Figure 3 is the front view of the three views of the fixture base plate

Figure 4 is a top view of the three views of the fixture bottom plate

Figure 5 is the left view of the three views of the fixture bottom plate

Figure 6 is a three-view view of the V-shaped block

Figure 7 is a schematic diagram of the design of the through grooves on both sides of the V-shaped block

Among them: 1. Clamping screw Ⅰ 2. Bolt Ⅰ 3. Gasket Ⅰ 4. Clamping screw Ⅱ 5. V-shaped block Ⅰ 6. Cylindrical workpiece Ⅰ 7. V-shaped block Ⅱ 8. Bolt Ⅱ 9. Fixture bottom plate 10 .V-type blockⅢ 11. Cylindrical workpieceⅡ 12.V-type blockⅣ 13. BoltⅢ 14. BoltⅣ 15. GasketⅡ 16. Clamping screwⅢ 17. GasketⅢ 18. Clamping screwⅣ 19. Pad Sheet Ⅳ 20. Gasket Ⅴ 21. Clamping screw Ⅴ 22. Gasket Ⅵ 23. Clamping screw Ⅵ 24. Gasket Ⅶ 25. Clamping screw Ⅶ 26. Gasket Ⅷ 27. Clamping screw Ⅷ 28. Locating pin Ⅰ 29. T-shaped slider Ⅰ 30. T-shaped slider Ⅱ 31. Positioning pin Ⅱ 32. Positioning hole 33. Guide rail 34. T-shaped slot 35. Equidistant threaded hole array 36. Adsorption disc 37. Measurement auxiliary line 38. Baseline

Detailed ways

The specific implementation manner of the present invention will be further described below in conjunction with the accompanying drawings.

The overall structure of the scheme is shown in Figure 1, which includes fixture base, clamping screw Ⅰ1, bolt Ⅰ2, gasket Ⅰ3, clamping screw Ⅱ4, V-shaped block Ⅰ5, cylindrical workpiece Ⅰ6, V-shaped block Ⅱ7, and bolt Ⅱ8 , V-shaped block Ⅲ10, cylindrical workpiece Ⅱ11, V-shaped block Ⅳ12, bolt Ⅲ13, bolt Ⅳ14, washer Ⅱ15, clamping screw Ⅲ16, washer Ⅲ17, clamping screw Ⅳ18, washer Ⅳ19, washer Ⅴ20, clamping Screw Ⅴ21, washer Ⅵ22, clamping screw Ⅵ23, washer Ⅶ24, clamping screw Ⅶ25, washer Ⅷ26, clamping screw Ⅷ27, positioning pin Ⅰ28, T-slider Ⅰ29, T-slider Ⅱ30 and locating pin Ⅱ31.

Among them, the fixture base includes a fixture base plate 9, which is provided with positioning holes 32, guide rails 33, T-shaped slots 34, equidistant threaded hole arrays 35, and adsorption discs 36, wherein V-shaped blocks I5 and V-shaped blocks II7 , V-shaped block III10 and V-shaped block IV12 are provided with guide grooves that can slide along the guide rail 33 on the top of the fixture bottom plate, and V-shaped block I5, V-shaped block II7, V-shaped block III10 and V-shaped block IV12 pass through their respective The guide groove at the bottom is movably connected with the guide rail 33 at the top of the fixture bottom plate 9, and the T-shaped slider I29 and the T-shaped slider II30 are respectively movably connected with the T-shaped grooves 34 on both sides of the positioning hole 32 of the fixture bottom plate 9; the positioning pin I28 is connected with the T The positioning hole on the T-shaped slider Ⅰ29 is detachably connected, and the positioning pin Ⅱ31 is detachably connected to the positioning hole on the T-shaped slider Ⅱ30; The hole is detachably connected with the positioning pin Ⅱ31 and the positioning pin Ⅰ28, and the position of the cylindrical workpiece Ⅰ6 and the cylindrical workpiece Ⅱ11 can be adjusted by adjusting the positions of the T-shaped slider Ⅰ29 and the T-shaped slider Ⅱ30; the V-shaped block Ⅰ5, the V-shaped block Ⅱ7, V-shaped block Ⅲ10 and V-shaped block Ⅳ12 are threadedly connected with the corresponding threaded holes in the equidistant threaded hole array 35 of the fixture base plate 9, and the V-shaped block Ⅰ5 and V-shaped block Ⅱ7 are used to clamp the cylindrical workpiece Ⅰ6, V-shaped block III10 and V-shaped block IV12 are used for clamping cylindrical workpiece II11.

Adjust the distance between V-shaped block Ⅰ5, V-shaped block Ⅱ7 and V-shaped block Ⅲ10, V-shaped block Ⅳ12 to clamp the cylindrical workpiece, so that the workpiece can be precisely fixed at the position required for processing; the four V-shaped blocks are on the bottom plate of the fixture The fixation on 9 is realized by clamping screws. There are through grooves on both sides of V-shaped block Ⅰ5, V-shaped block Ⅱ7, V-shaped block Ⅲ10 and V-shaped block Ⅳ12. The radii of the threaded holes in the threaded hole array 35 are the same, and the center distance of the rounded corners is equal to the distance between two adjacent threaded holes in the equidistant threaded hole array 35. When moving to any position, one or two threaded holes in the equidistant threaded hole array 35 on the side of the fixture base plate 8 may not be completely blocked by the rounded rectangular slot. As shown in Figure 7, when the V-shaped block moves to the position required for processing, if there is a threaded hole on each side that is not blocked, the V-shaped block can pass through the clamping screws on both sides and the equidistant threaded holes on the fixture bottom plate 9 respectively. Corresponding threads in array 35 are threaded; the V-block can be clamped with two or one clamping screw per side if the two threaded holes on each side are not obscured.

In the process of clamping the threaded connection with the clamping screw, in order to avoid the shaking of the clamping screw in the through groove, a gasket, such as a rubber pad, can be provided between each clamping screw and the through groove of the corresponding V-shaped block Sheet or spring washer, so that each clamping screw is fastened with the V-shaped block and the clamp bottom plate 9 through the washer, so as to improve the clamping and fixing effect of the V-shaped block; that is, the V-shaped block I5 can pass through the Clamping screw Ⅱ4, clamping screw Ⅴ21 and the corresponding gasket Ⅰ3, gasket Ⅴ20 are screwed to the corresponding threaded holes in the equidistant threaded hole array 35 on the fixture bottom plate 9 to be fastened, and the V-shaped block Ⅱ7 is tightened by the clamping screw Ⅰ1. The clamping screw Ⅵ23 and the corresponding gasket Ⅳ19, the gasket Ⅵ22 are screwed to the fixture bottom plate 9 to be fastened, and the V-shaped block Ⅲ10 is tightened by the clamping screw Ⅳ18, the clamping screw Ⅶ25 and the corresponding gasket Ⅲ17 and the gasket Ⅶ24 The threaded connection with the fixture bottom plate 9 is fastened, and the V-shaped block IV12 is fastened through the screw connection of the clamping screw III16, the clamping screw VIII27 and the corresponding gasket II15, the gasket VIII26 and the fixture bottom plate 9, and then the cylindrical workpiece I6 is realized. And precise clamping and fixing of cylindrical workpiece Ⅱ11.

V-shaped block Ⅰ5 and V-shaped block Ⅱ7 are threaded through bolts Ⅰ2 and Ⅱ8, and V-shaped block Ⅲ10 and V-shaped block Ⅳ12 are threaded through bolts Ⅲ13 and Ⅳ14; the middle of bolts Ⅰ2, Ⅱ8, Ⅲ13 and Ⅳ14 are Hexagonal nuts, the two sides are standard threads with opposite directions of rotation, while turning the two hexagonal nuts in the middle of bolt I2 and bolt II8, the distance between V-shaped block I5 and V-shaped block II7 can be adjusted synchronously; if the two nuts are screwed If the rotation is not synchronous, the V-shaped block Ⅰ5 and V-shaped block Ⅱ7 will be stuck and unable to move. This design can ensure that the position of the V-shaped block can be self-locked after the workpiece is accurately positioned, which further improves the machining accuracy; similarly, the V-shaped block The distance between block Ⅲ10 and V-shaped block Ⅳ12 can also be adjusted synchronously through bolts Ⅲ13 and Ⅳ14, so that not only the cylindrical workpiece Ⅰ6 and cylindrical workpiece Ⅱ11 can be clamped, but also the fixture can be used for columns with different diameters. The need for adjustment and clamping of shaped workpieces.

The fixture bottom plate 9 is also provided with a measurement auxiliary line 37 and a baseline 38, the measurement auxiliary line 37 is parallel to the direction of the guide rail 33, the baseline 38 passes through the center point of the fixture base and is perpendicular to the measurement auxiliary line 37, and passes through the measurement auxiliary line 37. The distance from the center of the positioning hole on the T-slider I29 and the T-slider II30 to the baseline 38 can be accurately measured, and the precise positioning of the workpiece at different off-axis positions can be further realized.

The back side of the fixture bottom plate 9 is provided with an adsorption disc 36 with high flatness, the positioning hole 32 in the center of the adsorption disc 36 is pinned to the positioning hole in the center of the vacuum chuck of the CNC machine tool, and the adsorption disc 36 is adsorbed on the vacuum chuck of the CNC machine tool , so that the fixture is fixed on the CNC machine tool, and the precise clamping of the workpiece is completed for subsequent processing and manufacturing.

In actual production and processing, the fixture provided by the present invention has been actually processed and manufactured, and has been used in the numerical control processing experiment of the corresponding cylindrical workpiece. It can be seen from actual production and processing that the fixture provided by the invention can be applied to the processing of cylindrical workpieces with different diameters and different off-axis distances, and has high versatility and practicability.

Claims (8)

1. one kind from the adjustable surface of revolution Precision Machining fixture of axle amount, it is characterized in that, comprise clamp base, pinching screw I (1), pinching screw II (4), V-block I (5), cylindrical workpiece I (6), V-block II (7), V-block III (10), cylindrical workpiece II (11), V-block IV (12), pinching screw III (16), pinching screw IV (18), pinching screw V (21), pinching screw VI (23), pinching screw VII (25), pinching screw VIII (27), alignment pin I (28), T-shaped slider I (29), T-shaped slide block II (30) and alignment pin II (31), described clamp base comprises clamp bottom board (9), clamp bottom board (9) is provided with locating hole (32), guiding rail (33), T-slot (34), constant worm pich hole array (35), absorption disk (36), and described V-block I (5), V-block II (7), V-block III (10) and V-block IV (12) bottom is equipped with the gathering sill that can slide along the guiding rail (33) at described clamp bottom board top, described T-shaped slider I (29) and T-shaped slide block II (30) are flexibly connected with the T-slot (34) of clamp bottom board (9) both sides respectively, described alignment pin I (28) removably connects with the hole above T-shaped slider I (29), and alignment pin II (31) removably connects with the hole above T-shaped slide block II (30), described cylindrical workpiece I (6) and cylindrical workpiece II (11) removably connect respectively by the locating hole of its bottom and alignment pin I (28) and alignment pin II (31), described V-block I (5) is threaded by the screwed hole that pinching screw II (4), pinching screw V (21) are corresponding with the constant worm pich hole array on clamp bottom board (9), described V-block II (7) is threaded by the screwed hole that pinching screw I (1), pinching screw VI (23) are corresponding with the constant worm pich hole array on clamp bottom board (9), described V-block III (10) is threaded by the screwed hole that pinching screw IV (18), pinching screw VII (25) are corresponding with the constant worm pich hole array on clamp bottom board (9), described V-block lV (12) is threaded by the screwed hole that pinching screw III (16), pinching screw VIII (27) are corresponding with the constant worm pich hole array on clamp bottom board (9), described V-block I (5) is with V-block II (7) for clamping cylindrical workpiece I (6), and V-block III (10) and V-block IV (12) are for clamping cylindrical workpiece II (11).

2. a kind of surface of revolution Precision Machining fixture adjustable from axle amount as claimed in claim 1, it is characterized in that, described V-block I (5), V-block II (7), the both sides of V-block III (10) and V-block IV (12) are equipped with groove, described groove is designed to when V-block I (5), V-block II (7), V-block III (10), when any one in V-block IV (12) moves to any position, one or two screwed hole is had not blocked by groove completely in constant worm pich hole array (35) on described clamp bottom board (9).

3. a kind of surface of revolution Precision Machining fixture adjustable from axle amount as claimed in claim 2, it is characterized in that, described groove is round rectangle groove.

4. a kind of surface of revolution Precision Machining fixture adjustable from axle amount as claimed in claim 2, it is characterized in that, between the groove of described pinching screw II, pinching screw V, pinching screw I, pinching screw VI, pinching screw IV, pinching screw VII, pinching screw III, pinching screw VIII and corresponding V-block I, V-block II, V-block III, V-block IV, be respectively equipped with pad I, pad V, pad IV, pad VI, pad III, pad VII, pad II, pad VIII.

5. a kind of surface of revolution Precision Machining fixture adjustable from axle amount as claimed in claim 4, it is characterized in that, described pad I, pad II, pad III, pad IV, pad V, pad VI, pad VII, pad VIII are rubber sheet gasket or spring shim.

6. as a kind of adjustable from the axle amount surface of revolution Precision Machining fixture as described in arbitrary in claim 1 to 5, it is characterized in that, also comprise bolt I (2), bolt II (8), bolt III (13) and bolt IV (14), described V-block I (5) and V-block II (7) are threaded by bolt I (2) and bolt II (8), and described V-block III (10) and V-block IV (12) are threaded by bolt III (13) and bolt IV (14); The centre of described bolt I (2), bolt II (8), bolt III (13) and bolt IV (14) is hex nut and both sides are the screw thread that rotation direction is contrary.

7. as a kind of adjustable from the axle amount surface of revolution Precision Machining fixture as described in arbitrary in claim 1 to 5, it is characterized in that, described clamp bottom board (9) is also provided with and measures boost line (37) and baseline (38), described measurement boost line (37) parallels with the direction of described guiding rail (33), and described baseline (38) is perpendicular with measurement boost line (37) through described clamp base central point.

8. as a kind of adjustable from the axle amount surface of revolution Precision Machining fixture as described in arbitrary in claim 1 to 5, described clamp bottom board (9) back side is provided with absorption disk (36), described absorption disk (36) center is provided with locating hole (32), fixture by absorption disk (36) and locating hole (32) absorption and pin joint on the vacuum cup of lathe.