CN103968758A - Mechanical device of automatic planar thread measurement system - Google Patents

Abstract

The invention discloses a mechanical device of a plane thread automatic measuring system. The invention includes a tracking type pole diameter measuring mechanism for measuring the pole diameter of a plane threaded coil workpiece, a leveling, centering and polar angle spindle mechanism for detecting the rotation angle and adjusting the plane threaded coil workpiece, and a tracking type pole diameter measuring mechanism. The guide rail installation box is installed on the worktable through the screw lifting seat and moves up and down along the lead screw of the screw lifting seat. The leveling, centering and polar angle spindle mechanism is installed on the working table below the side of the tracking polar diameter measuring mechanism. . The invention is mainly used for the detection of the plane thread helix. The invention ensures that the driving head is always in contact with the outer helical surface of the plane thread, the measuring head tracks the driving head, and only contacts the workpiece during measurement, and drives the grating reading head to measure, which overcomes the measurement error caused by the wear of the measuring head Influence.

Description

Mechanical device of a flat thread automatic measuring system

technical field

The invention relates to a plane thread measuring device, in particular to a mechanical device of a plane thread automatic measuring system.

Background technique

When a moving point in the plane moves at a constant speed along a straight line, and at the same time, the line moves around a point on the line at a constant speed, then the track of the moving point is a plane spiral, and the shape formed along the spiral has a specified tooth. The continuous protrusion of the shape is the flat thread. In many occasions of industrial production, accurate measurement of flat threads is required. At present, the more common method is tool microscopy.

Due to the limitations of detection technology and equipment, most chuck manufacturers in my country still use the static subpoint measurement method, that is, the combination of a universal tool microscope and a dial to detect the helical error of the plane thread, and it takes about 30 minutes to complete a measurement.

This kind of measurement adjustment is complicated, the data processing is cumbersome, the measurement accuracy is low, and the efficiency is low.

Contents of the invention

The purpose of the present invention is to provide a mechanical device for a flat thread automatic measuring system against the deficiencies of the prior art. The measuring head is divided into two parts: measuring and driving. The workpiece can be directly leveled and centered after being clamped once, and the detection process does not require manual labor. Intervention for reliable and efficient measurement of flat threads.

In order to achieve the above object, the technical scheme adopted in the present invention is:

The invention includes a tracking type pole diameter measuring mechanism for measuring the pole diameter of a plane threaded coil workpiece, a leveling, centering and polar angle spindle mechanism for detecting the rotation angle and adjusting the plane threaded coil workpiece, and a tracking type pole diameter measuring mechanism. The guide rail installation box is installed on the worktable through the screw lifting seat and moves up and down along the lead screw of the screw lifting seat. The leveling, centering and polar angle spindle mechanism is installed on the working table below the side of the tracking polar diameter measuring mechanism. .

The track-type polar diameter measuring mechanism includes a guide rail installation box, a measuring head, a driving head, a measurement guide shaft, a drive guide shaft, and a micro-motion cylinder; the guide rail installation box is provided with a parallel arrangement of a measurement guide shaft and a drive guide shaft , the measurement guide shaft is located above the drive guide shaft, the end of the measurement guide shaft close to the leveling, centering and polar angle spindle mechanism is connected to the side of one end of the L-shaped bracket, the measuring head is installed on the other side of the L-shaped bracket through the pin shaft, and the drive The end of the guide shaft close to the leveling, centering and polar angle spindle mechanism is connected to the drive head bracket. The drive head is installed on the lower end surface of the drive head bracket, and the drive head and the measuring head are installed in parallel directly above the flat threaded coil workpiece to be measured;

The front panel of the guide rail installation box parallel to the measurement guide shaft is provided with a strip groove for line-of-sight observation of the measurement guide shaft. A grating scale is installed on the front panel above the measurement guide shaft. The measurement guide shaft in the guide rail installation box There is a moving ruler connecting sleeve on the upper sleeve, which slides along the measuring guide shaft, and a moving ruler connecting piece is fixedly installed on the moving ruler connecting sleeve, and a moving ruler that cooperates with the grating ruler for sight observation is installed on the moving ruler connecting piece; Away from the connection between the end of the leveling, centering and polar angle spindle mechanism and the adjustment bracket, the adjustment body of the measuring head and the spring connecting piece of the measuring head are installed on the adjusting bracket, the adjusting body of the measuring head is located above the spring connecting piece of the measuring head; the driving guide shaft is far away from the adjusting One end of the center-aligning and polar-angle spindle mechanism is connected to the tail bracket. A lever bottom plate is installed on the top surface of the tail bracket. A micro-motion cylinder and a lever bracket are installed on the lever bottom plate. The lever shaft is hinged on the side of the lever bracket through a lever pin. The piston rod of the dynamic cylinder is connected with the bottom end of the lever shaft installed in the lever bracket, the top of the lever shaft stretches out of the lever bracket, and a spring is connected between the spring connecting piece of the driving head and the spring connecting piece of the measuring head.

During measurement, the drive head is close to the side of the plane threaded coil workpiece, the measuring head is inserted into the threaded hole on the plane threaded coil workpiece, and contacts with the hole wall; the top end of the lever shaft is in contact with the measuring head adjustment body.

The other end surface of the L-shaped bracket is equipped with a laser displacement sensor for detecting the displacement along the vertical direction of the flat threaded coil workpiece after rotation.

The described leveling, centering and polar angle spindle mechanism includes a circular grating scale angle plate, a leveling and centering platform, a rotary shaft, a fixed length, a rigid coupling, a pneumatic triple, an air bearing spindle, and a servo motor. The servo motor is installed At the bottom of the frame of the worktable, the servo motor is connected to one end of the rotary shaft through a rigid coupling, and the other end of the rotary shaft is connected to the air-floating spindle through a rigid coupling, and the upper end of the air-floating spindle passes through the workbench and the leveling and centering platform Connection, the angle plate of the circular grating scale is installed on the rotary shaft through the fixed connecting piece, the side of the angle plate of the circular grating scale is provided with a fixed length, and the fixed length is installed on the frame through the fixed length installation rod, and the bottom surface of the frame is installed with a pneumatic triple piece. The triplets are connected by a hose air bearing spindle.

Beneficial effects of the present invention:

The tracking type polar diameter measuring mechanism of the present invention ensures that the driving head is always in contact with the outer helical surface of the plane thread, and the measuring head tracks the driving head, and only contacts with the workpiece during measurement, and drives the grating reading head to measure, which overcomes the problem caused by the measuring head The effect of wear on measurement errors.

Description of drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a right side view of the present invention.

Figure 3 is a top view of the present invention.

Fig. 4 is a structural schematic diagram of the pole radius tracking and measuring mechanism of the present invention.

Fig. 5 is a partial enlarged view on the left side of the pole radius tracking and measuring mechanism of the present invention.

Fig. 6 is a structural schematic diagram of the leveling, centering and polar angle spindle mechanism of the present invention.

Fig. 7 is an overall working principle diagram of the present invention.

In the figure: A. Pole diameter tracking and measuring mechanism, B. Leveling, centering and polar angle spindle mechanism, C. Lead screw lifting seat, 1. Driving head, 2. Measuring head, 3. Driving head bracket, 4. Pin Shaft, 5. L-shaped bracket, 6. Measuring guide shaft, 7. The first nut with flange, 8. Connecting sleeve of moving ruler, 9. Moving ruler, 10. Front panel, 11. The second nut with flange , 12, adjusting bracket, 13, measuring head adjusting body, 14, measuring head spring connecting piece, 15, spring, 16, lever shaft, 17, driving head spring connecting piece, 18, lever pin, 19, lever bracket, 20 , micro-moving cylinder, 21, lever bottom plate, 22, tail bracket, 23, side plate, 24, frame, 25, servo motor, 26, rigid coupling, 27, circular grating scale angle plate, 28, fixed connecting piece . 37. Laser displacement sensor, 38. Guide rail installation box, 39. Grating ruler.

Detailed ways

The implementation of the technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

As shown in Figures 1 to 3, the present invention includes a tracking type pole diameter measuring mechanism A for measuring the pole diameter of the plane threaded coil workpiece 32, a leveling and centering mechanism A for detecting the rotation angle and adjusting the plane threaded coil workpiece 32 The polar angle spindle mechanism B, the guide rail installation box 38 of the tracking type polar diameter measuring mechanism A is installed on the workbench through the screw lifting seat C and moves up and down along the lead screw of the screw lifting seat C to level the centering and polar angle. The main shaft mechanism B is installed on the workbench under one side of the tracking type pole diameter measuring mechanism A.

As shown in Figure 4, the tracking type polar diameter measuring mechanism includes a guide rail installation box 38, a measuring head 2, a drive head 1, a measurement guide shaft 6, a drive guide shaft 36, and a micro-motion cylinder 20; the guide rail installation box 38 is provided with The measurement guide shaft 6 and the drive guide shaft 36 are arranged in parallel, the measurement guide shaft 6 is located above the drive guide shaft 36, and the end of the measurement guide shaft 6 close to the leveling, centering and polar angle spindle mechanism B is connected to the side of one end of the L-shaped bracket 5 , the measuring head 2 is installed on the other end side of the L-shaped bracket 5 through the pin shaft 4, the driving guide shaft 36 is close to the connection between the leveling, centering and polar angle spindle mechanism B and the driving head bracket 3, and the driving head 1 is installed on the driving head The lower end surface of the bracket 3, the driving head 1 and the measuring head 2 are installed in parallel directly above the flat threaded coil workpiece 32 to be measured; the measuring head 2 is located outside the driving head 1, and the two ends of the measuring guide shaft 6 pass through the first flange respectively. The nut 7 and the second flanged nut 11 are installed on the side plates 23 on both sides of the rail installation box 38 .

In the present invention, the measuring head 2 and the driving head 1 are separated and arranged up and down. The measuring head 2 is above the driving head 1 on the outside, and the driving head 1 is below the measuring head 2 on the inside. The measuring head 2 and the driving head 1 are respectively connected with the measuring guide shaft 6 and the driving guide shaft 36 by the L-shaped bracket 5 and the driving head bracket 3. A threaded hole is opened in the direction of the axis, and a small slot is opened in the direction parallel to the respective guide axis, and the measuring head 2 and the driving head 1 are connected by a fastening connection of the thread.

As shown in Figure 4, on the front panel 10 of the guide rail installation box 38 parallel to the measurement guide shaft 6, there is a bar-shaped groove for observing the line of sight of the measurement guide shaft 6, and the front panel 10 above the measurement guide shaft 6 is installed. There is a grating ruler 39, the measuring guide shaft 6 in the guide rail installation box 38 is covered with a moving ruler connecting sleeve 8, the moving ruler connecting sleeve 8 slides along the measuring guide shaft 6, and the moving ruler connecting sleeve 8 is fixedly installed with a moving ruler connecting piece 9. A moving ruler that cooperates with the grating ruler 39 for line-of-sight observation is installed on the connecting piece 9 of the moving ruler; the measurement guide shaft 6 is far away from the connection between the end of the leveling, centering and polar angle spindle mechanism B and the adjustment bracket 12, and the adjustment bracket 12 is equipped with The measuring head adjustment body 13 and the measuring head spring connecting piece 14, the measuring head adjusting body 13 is located above the measuring head spring connecting piece 14; the driving guide shaft 36 is away from the connection between the leveling and centering and polar angle spindle mechanism B and the tail bracket 22, A lever base plate 21 is installed on the tail support 22 top surface, and a micro-movement cylinder 20 and a lever support 19 are installed on the lever base plate 21. The lever shaft 16 bottom in the lever bracket 19 is connected, and the top end of the lever shaft 16 stretches out from the lever bracket 19 , and a spring 15 is connected between the driving head spring connecting piece 17 and the measuring head spring connecting piece 14 .

The moving ruler connecting piece 9 is fixedly installed on the measuring guide shaft 6 of the measuring head, and moves together with the measuring head 2 .

During measurement, the drive head 1 is close to the side of the plane threaded coil workpiece 32, and the measuring head 2 is inserted into the threaded hole on the plane threaded coil workpiece 32, and is in contact with the hole wall; the top end of the lever shaft 16 is adjusted with the measuring head The body 13 is in contact with each other, and the micro-movement cylinder 20 pushes the lever shaft 16 on the bracket to measure.

As shown in FIG. 4 , the other end surface of the L-shaped support 5 is equipped with a laser displacement sensor 37 for detecting the vertical displacement of the flat threaded coil workpiece 32 after rotation.

As shown in Figure 6, the leveling and centering and polar angle main shaft mechanism B includes a circular grating scale angle plate 27, a leveling and centering platform 31, a rotary shaft 29, a fixed length 33, a rigid coupling 26, a pneumatic triple unit 35, The air-floating main shaft 30 and the servo motor 25, the servo motor 25 is installed at the bottom of the frame 24 of the workbench, the servo motor 25 is connected with one end of the rotary shaft 29 through the rigid coupling 26, and the other end of the rotary shaft 29 is connected with the rotary shaft 29 through the rigid coupling 26. The air-floating main shaft 30 is connected, and the upper end of the air-floating main shaft 30 is connected to the leveling and centering table 31 through the workbench. On the rotating shaft 29, the side of the circular grating ruler angle disc 27 is provided with a fixed length 33 for detecting the angle, and the fixed length 33 is installed on the frame 24 through the fixed length installation rod; 35 is connected with the air bearing main shaft 30 by flexible pipe 34.

The leveling, centering and polar angle spindle mechanism is driven by a servo motor and controlled by a computer. The computer gives the angle signal, the standard polar angle spindle mechanism gives the standard value of the angle, the servo motor 25 drives the rotary shaft 29 to rotate, and the laser micro-displacement sensor 37 detects the distance value of the workpiece in the vertical direction after the workpiece rotates, and measures it according to each angle Adjust the leveling and centering table 31 to achieve the leveling of the flat threaded coil workpiece 32.

The measuring head 2 touches the hole wall of the plane threaded coil workpiece 32, drives the servo motor 25 to rotate, and when the angle value of the angle disc 27 of the circular grating scale reaches a full circle, calculates the eccentricity of the plane threaded coil workpiece 32, and adjusts the leveling adjustment in the horizontal direction. The heart platform 31 realizes the centering of the workpiece 32.

The overall working principle of each mechanism of the present invention is shown in FIG. 7 . This device is controlled by the upper computer and PLC control system, and it works according to a certain sequence of work. After the flat threaded coil workpiece 32 is clamped and positioned, the leveling and centering are performed first, and then the helical shape of the plane threaded coil workpiece is measured and the data is recorded. .

Tracking type polar diameter measuring mechanism A of the present invention is shown in Figure 2, comprises two measuring heads, is drive head 1 and measuring head 2 respectively, and the stylus of measuring head 2 is fixed on L-shaped support 5 by a pin shaft 4 superior. The L-shaped bracket 5 is slotted in the middle, and the upper screw hole and the measurement guide shaft 6 are fixed in the measurement guide shaft 6 by screws, and the laser displacement sensor 37 is fixed on the front end of the support 5 . The driving head 1 is directly installed in the driving head support 3 having a threaded hole, and the driving head support 3 and the driving guide shaft 36 below the measuring shaft 6 are fixed by threaded connection.

The measuring guide shaft 6 and the driving guide shaft 36 are rolled and fitted with the first flanged nut 7 and the second flanged nut 11 with pretightening force, and the two flanged nuts are installed on both sides by threaded connectors. On the side panel 23. With the two side panels as the installation reference, the grating ruler 39 is installed on the front panel 15, and the moving ruler is installed on the connecting piece 9 of the moving ruler. The connecting piece 9 is fixedly installed on the measuring guide shaft 6 through the connecting sleeve 8 of the moving ruler. Move in a straight line.

The tails of the measuring guide shaft and the driving guide shaft are equipped with an adjustment bracket 12 and a tail bracket 22 respectively. According to the tail bracket, the measuring force of the driving head is transmitted to the measuring guide shaft so as to drive the grating moving ruler to move linearly to obtain the linear displacement.

In the leveling, centering and polar angle spindle mechanism B, the lever pin shaft 18 is connected with the lever shaft 16 through a transition fit, the measuring head spring connecting piece 14 and the driving head spring connecting piece 17 are connected through a cylindrical spring 15, and the lever shaft 18 Rotate along lever pin shaft 16 and can do the swing of about 10 degrees in a small range, the upper end of lever shaft 18 swing end can be contacted with measuring head adjusting body to bear force, and the lower end of swing end is connected with micro-motion cylinder 20.

The overall mechanism A is installed on the column through the lead screw, and moves vertically according to the need of measuring the height.

The leveling, centering and polar angle spindle mechanism B is shown in Figure 6. Position the plane threaded coil workpiece on the leveling and centering table 31, and connect the air-floating main shaft 30 under the leveling and centering table 31. The control valve is connected, and the position of the leveling and centering table 31 is gradually adjusted through the rotation of the air main shaft under the control program. The standard pole-angle spindle mechanism C between the bottom of the air-floating spindle 30 and the top of the servo motor 25 is connected by a rigid coupling, wherein the scale 33 of the circular grating scale and the servo motor 35 are fixed on the frame 24 . The circular grating ruler 27 is connected to a rotary shaft 29 with a standard polar angle via a connecting piece 28 .

Concrete implementation work process of the present invention:

The rotary motion of the leveling, centering and polar angle spindle mechanism B of the present invention generates a standard polar angle, and the polar diameter of the plane thread is obtained through the tracking mechanism and the grating reading system between the measuring head and the driving head of the tracking polar diameter measuring mechanism A , from the standard polar angle and polar diameter, calculate and evaluate the errors of the helix, and at the same time level the self-aligning and polar angle spindle mechanism B to adjust the levelness of the workpiece and the coaxiality with the spindle rotation center.

During the detection process, the workpiece is firstly leveled and centered. The leveling process is that the workpiece 32 rotates through a certain angle with the motor 25, the circular grating ruler 27 records the rotation angle value, the laser displacement sensor 37 obtains the plane height of the workpiece, and adjusts the leveling and centering worktable 31 according to the plane difference to make the workpiece 32 reach the predetermined level requirements.

The centering process is to rotate the screw lifting seat of the tracking type polar diameter measuring mechanism A, which moves up and down, and push the measuring head 2 left and right, so that the measuring head 2 contacts the inner hole wall of the workpiece 32, and the servo motor 25 rotates at an equal angle, and the measuring head 2 Obtain the position information of the inner hole wall of the workpiece 32, and after the circular grating 27 rotates one circle, automatically calculate the eccentricity of the workpiece 32, guide and adjust the leveling and centering table 31 according to the measurement results, and the motor 25 stops rotating when the workpiece posture meets the eccentricity requirement.

The measurement process is to push the drive guide shaft 36 so that the drive head 1 on the drive head bracket 3 enters the groove of the workpiece 32 and contacts the outer helical surface. The micro-movement cylinder 20 pushes the lever 16 outward to rotate a small angle clockwise, and the lever shaft 16 The other end pushes the measuring head adjustment body 13 to overcome the tension of the spring 15 and move to the right, so that the measuring head 2 enters the coil groove of the workpiece 32 and is not in contact with the inner helical surface. After the servo motor 25 starts to rotate at a fixed angle, the micro-movement cylinder 20 In reverse drive, the measuring guide shaft 6 drives the measuring head 2 to move to the left under the action of the spring 15 and contacts the inner helical surface of the workpiece 32 to obtain the angle value of the angle disc 27 of the circular grating scale, and at the same time obtain the driving grating of the connecting piece 9 of the moving scale. Measure the movement amount of ruler 39, record the polar diameter and polar angle of the measuring station, and calculate the helix deviation of the measuring point after error correction. Until all measurements of the helix are completed. Calculation of planar thread helix error by error separation.

The feature of the tracking type pole diameter measuring mechanism is that the measuring head and the driving head tracking mechanism arranged up and down ensure that the driving head is always in contact with the outer helical surface of the plane thread, and the measuring head tracks the driving head. The readhead performs the measurement.

The feature of the workpiece leveling and centering part in the leveling and centering and polar angle spindle mechanism B is to obtain the vertical and horizontal values of the workpiece according to the angle value given by the standard polar angle spindle part, the laser sensor (laser micro-displacement sensor) and the reading value of the grating ruler. The offset in the direction guides and adjusts the leveling and centering table to complete the leveling and centering of the flat threaded coil workpiece.

Leveling, centering and polar angle spindle mechanism B The characteristic of the standard polar angle spindle part is that the servo motor drives the air bearing spindle and the workpiece leveling and centering mechanism installed on it to rotate through a rigid coupling, and the circular grating scale angle disc Read off the standard polar angle.

The above specific embodiments are used to explain the present invention, rather than to limit the present invention. Within the spirit of the present invention and the protection scope of the claims, any modification and change made to the present invention will fall into the protection scope of the present invention.

Claims (5)

1. the mechanical hook-up of a flat thread automatic measurement system, it is characterized in that: comprise the tracking mode utmost point footpath measuring mechanism (A) for measurement plane screw thread parcel workpiece (32) utmost point footpath, for detection of corner and adjust leveling aligning and the polar angle mainshaft mechanism (B) of flat thread parcel workpiece (32), the guide rails assembling casing (38) of tracking mode utmost point footpath measuring mechanism (A) is arranged on worktable and along the leading screw of leading screw elevating bracket (C) and is moved up and down by leading screw elevating bracket (C), leveling aligning and polar angle mainshaft mechanism (B) are arranged on the worktable of tracking mode utmost point footpath measuring mechanism (A) side-lower.

2. the mechanical hook-up of a kind of flat thread automatic measurement system according to claim 1, is characterized in that: described tracking mode utmost point footpath measuring mechanism comprises guide rails assembling casing (38), measuring head (2), driving head (1), measures the axis of guide (6), drives the axis of guide (36), micro-cylinder (20), in guide rails assembling casing (38), be provided with the measurement axis of guide (6) being arranged in parallel and drive the axis of guide (36), measure the axis of guide (6) and be positioned at the top that drives the axis of guide (36), measuring the axis of guide (6) is connected with an end side surface of L-type support (5) near leveling aligning and polar angle mainshaft mechanism (B) one end, measuring head (2) is arranged on the other end side of L-type support (5) by bearing pin (4), the close leveling aligning of the driving axis of guide (36) and polar angle mainshaft mechanism (B) one end are connected with driving head support (3), driving head (1) is arranged on driving head support (3) lower surface, driving head (1) and measuring head (2) be installed in parallel in measured flat thread parcel workpiece (32) directly over,

With measure the front panel (10) of the axis of guide (6) parallel corresponding guide rails assembling casing (38) on have for to the bar-shaped trough of measuring the observation of the axis of guide (6) sight line, on the front panel (10) of the measurement axis of guide (6) top, grating scale (39) is installed, the upper cover of the measurement axis of guide (6) in guide rails assembling casing (38) has chi adapter sleeve (8), moving chi adapter sleeve (8) slides along measuring the axis of guide (6), on moving chi adapter sleeve (8), be installed with moving chi brace (9), on moving chi brace (9), the moving chi that coordinates sight line observation with grating scale (39) is installed, measure the axis of guide (6) being connected away from leveling aligning and polar angle mainshaft mechanism (B) one end and adjusting pole (12), measuring head is installed on adjusting pole (12) and adjusts body (13) and measuring head spring brace (14), measuring head is adjusted body (13) and is positioned at measuring head spring brace (14) top, drive the axis of guide (36) being connected away from leveling aligning and polar angle mainshaft mechanism (B) one end and bracket at tail part (22), on bracket at tail part (22) end face, lever base plate (21) is installed, micro-cylinder (20) and lever dolly (19) are installed on lever base plate (21), lever shaft (16) is hinged on lever dolly (19) side by lever bearing pin, the piston rod of micro-cylinder (20) is connected with lever shaft (16) bottom being arranged in lever dolly (19), lever dolly (19) is stretched out on lever shaft (16) top, between driving head spring brace (17) and measuring head spring brace (14), be connected with spring (15).

3. the mechanical hook-up of a kind of flat thread automatic measurement system according to claim 2, it is characterized in that: when measurement, described driving head (1) is close to the side of flat thread parcel workpiece (32), measuring head (2) inserts in the threaded hole on flat thread parcel workpiece (32), and contacts with hole wall; Lever shaft (16) top is adjusted body (13) cooperation with measuring head and is contacted.

4. the mechanical hook-up of a kind of flat thread automatic measurement system according to claim 2, is characterized in that: on described L-type support (5) other end, be provided with for detection of the laser displacement sensor of displacement (37) vertically after flat thread parcel workpiece (32) rotation.

5. the mechanical hook-up of a kind of flat thread automatic measurement system according to claim 2, it is characterized in that: described leveling aligning and polar angle mainshaft mechanism (B) comprise round grating scale angle scale (27), leveling core-regulating platform (31), revolving shaft (29), scale (33), positive coupling (26), pneumatic triple piece (35), air-floating main shaft (30) and servomotor (25), servomotor (25) is arranged on frame (24) bottom of worktable, servomotor (25) is connected with revolving shaft (29) one end by positive coupling (26), revolving shaft (29) other end is connected with air-floating main shaft (30) by positive coupling (26), air-floating main shaft (30) upper end is connected with leveling core-regulating platform (31) through worktable, revolving shaft (29) is upper installs circle grating scale angle scale (27) by being fixedly connected with sheet (28), circle grating scale angle scale (27) side is provided with scale (33), scale (33) is arranged in frame (24) by scale mounting rod, frame (24) bottom surface is provided with pneumatic triple piece (35), pneumatic triple piece (35) connects by flexible pipe (34) air-floating main shaft (30).