CN111496583A - A new type of high-speed and high-precision CNC end face cylindrical grinder - Google Patents

Abstract

The invention relates to a novel high-speed high-precision numerical control end surface cylindrical grinding machine which comprises a machine body, a large cover, a motor box, a grinding carriage, a headstock body, a tailstock and a workbench, wherein the large cover, the grinding carriage, the headstock body, the tailstock and the workbench are arranged on the machine body. The headstock rotation of the invention realizes stepless speed change through a servo motor; the advancing and retreating of the tip of the tail stock are tightly propped by a spring, so that the clamping force of a workpiece can be adjusted, and the deformation of the slender workpiece is prevented; the grinding carriage feeds the X-axis light distribution grating ruler, so that feeding, measurement and processing closed-loop control is realized, and the processing precision is well ensured; the upper workbench can be manually adjusted to rotate a certain angle relative to the lower workbench, so that the small-taper cylindrical grinding is realized.

Description

A new type of high-speed and high-precision CNC end face cylindrical grinder

Technical field:

The invention relates to the technical field of mechanical processing, in particular to a novel high-speed and high-precision numerical control end face cylindrical grinding machine.

Background technique:

The cylindrical grinder is usually composed of a headstock and a tailstock, which support, center, clamp and drive the workpiece. The headstock is the main component of the cylindrical grinding machine, and the main shaft in the headstock is the key part to ensure the rotation accuracy. The precision of the main shaft has a direct impact on the geometric accuracy and working accuracy of the whole machine.

The main shaft speed change of the headstock of the existing cylindrical grinder is generally driven by a pulley, which cannot achieve precise speed change, and the speed change of the pulley is inconvenient. In addition, the two ends of the main shaft are usually supported by bearings, and the dimensional stability is low when processing some high-precision parts, and the surface finish often cannot meet the high requirements.

Precision grinders require high geometric accuracy and low-speed feed movement stability, and the worktable must be low-speed feed movement, requiring no crawling and no impact and can work smoothly. In addition, the vibration damping performance is required to be good, and the vibration will have a serious adverse effect on the processing quality.

Invention content:

In order to overcome the deficiencies of the existing equipment, a new type of high-speed and high-precision CNC end-face cylindrical grinding machine is provided, which reduces bearing wear, improves the spindle rotation accuracy, prevents the deformation of slender workpieces, and ensures machining accuracy.

The purpose of the present invention is achieved through the following technical solutions: a new type of high-speed and high-precision CNC end-face cylindrical grinder, including a bed, a large cover, a motor box, a grinding wheel frame, a headstock body, a tailstock and a workbench, in the bed The body is provided with a large cover, a grinding wheel frame, a headstock body, a tailstock and a worktable, the headstock is sleeved on the front section of the headstock main shaft, and the outer circle of the front end of the headstock main shaft is equipped with a first bearing and a second bearing, and then By pressing the lock nut, a gas film ring is sleeved on the main shaft of the headstock, and then put into the sleeve, and the third bearing, the bearing inner spacer, and the outer spacer are sequentially installed on the outer circle of the sleeve. , bearing and a second synchronous pulley, the second synchronous pulley is pressed by the dial, one end of the coupling key is fixed on the dial, and the other end of the coupling key is stuck in the coupling key groove of the headstock spindle Inside, the fourth bearing is pressed by the gland, and then the cover is installed on the dial, the outer circle of the rear end of the headstock main shaft is sleeved with the fifth bearing and the sixth bearing, and the rear end is pressed by the support , a first servo motor, a first motor connecting plate, a first synchronous pulley and a first synchronous belt are installed in the head frame body, and the first servo motor drives the first synchronous pulley, the first synchronous belt and the first synchronous belt. The second synchronous pulley rotates, and the second synchronous pulley drives the main shaft to rotate through the coupling key on the dial.

The rotation of the headstock realizes stepless speed change through the servo motor, and adopts a "dead" top structure (that is, the main shaft of the headstock does not rotate). The servo motor is driven by the synchronous belt, and then drives the dial 22-2 to rotate. Drive the workpiece to rotate. The motor is controlled by the servo motor driver to realize the stepless speed change of the workpiece. For the convenience of loading and unloading the workpiece, the headstock has a precise stop function, and the headstock sleeve adopts dense ball bearing support and air film ring.

A further improvement of the present invention is that: the main shaft of the headstock is covered with an air film ring, and the air film ring is fed with air from the outside, and a layer of air film is formed between the main shaft and the air film ring, so that the main shaft is in a suspended state and reduces the speed of the main shaft. The friction between the bearing and the bearing can effectively reduce the vibration of the main shaft and improve the precision of the main shaft rotation.

A further improvement of the present invention is that: the bed is further provided with a chip conveyor and a first screw part, and the worktable is arranged on the first screw part.

A further improvement of the present invention is that: a second servo motor is installed on the bed through the second motor connecting plate, a fourth synchronous pulley is installed at the front end of the second servo motor, and the fourth synchronous pulley passes through The second synchronous belt is connected with a third synchronous pulley, the third synchronous pulley drives the first screw member to rotate, and the first screw member drives the worktable to move on the bed. A tensioning mechanism is installed on the synchronous belt.

A further improvement of the present invention is that: the tailstock comprises a tailstock body, a tip cover, a tip, a spring and an adjusting handle, the tip is sleeved in the tailstock body, and a tip is installed at the front end of the tip sleeve, and the tip is installed at the front end of the tip sleeve. The top sleeve is equipped with a spring and an adjusting handle, which is used for adjusting the clamping force of the workpiece to prevent the slender parts from being deformed due to excessive clamping force.

A further improvement of the present invention is that: the workbench includes an upper workbench, a lower workbench, a left pressing plate, a right pressing plate, a dial indicator, a watch seat, a counter bar, a connecting plate and a screw rod, and at one end of the screw rod It is installed on the connecting plate, and the other end is connected with the table base. The two ends of the upper worktable are clamped between the left and right pressing plates. One end of the upper worktable is connected with the screw rod through the connecting plate. One end is made with a circular arc surface, which is close to the circular arc surface on the right side of the upper worktable and fixed with the upper worktable. There is a counter bar on the connecting plate, and the counter bar presses the dial indicator and rotates the screw rod to drive the upper worktable to rotate between the left and right pressing plates. At this time, the connecting plate Press the dial indicator with the counter bar and read the value of rotation.

The worktable adopts the upper and lower structure, and the upper worktable table is a horizontal plane, so that the head and tailstock can be positioned on it more stably and rigidly. The upper worktable can be manually adjusted and rotated at a certain angle relative to the lower worktable, so as to realize cylindrical grinding with small taper.

A further improvement of the present invention is that: the grinding wheel frame includes a grinding head base plate, a grinding head body, a linear rail and a grinding wheel, the grinding wheel is fixed on the main shaft, the main shaft is installed in the grinding head body, and the grinding head body is mounted outside the grinding head body. There is a grinding wheel cover and a motor, which are fixed above the backing plate. A second screw part and a line rail are installed under the backing plate. The second screw part is driven by a servo motor. Move back and forth.

The front grinding wheel dressing device is adopted, and through the linkage of the X axis and the Z axis, the dressing and compensation of various profiles of the grinding wheel are realized, which ensures the consistency of the grinding state of the grinding wheel.

Feeding mechanism (grinding wheel frame, table drive mechanism):

The grinding wheel frame feed adopts NSK screw bearing and precision ball screw, and the table drive adopts NSK screw bearing and precision ball screw, which is connected with the servo motor through the synchronous belt to achieve precise feeding.

A further improvement of the present invention is that a first spacer ring and a second spacer ring are arranged between the sleeve and the locking nut.

A further improvement of the present invention is that: a nut is installed at the tail of the main shaft of the headstock, and the screw is tightened by a screw installed on the support.

A further improvement of the present invention is that: the front end of the head frame body is provided with a front cover, the rear end is provided with a rear cover, and the top is provided with a top cover.

A further improvement of the present invention is that a cover is installed on the dial.

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

1. The machine tool adopts CNC control to carry out two-axis and two-linkage: that is, the grinding wheel frame feed (X axis), the table movement (Z axis), and the headstock rotation is realized by the servo motor to achieve stepless speed change;

2. An air film ring is added in the middle of the main shaft of the headstock, so that a layer of air film is formed between the air film rings when the main shaft rotates, so that the main shaft is in a suspended state, reducing bearing wear and improving the rotation accuracy of the main shaft.

3. The advance and retreat of the top of the tailstock adopts the spring to tighten, which can adjust the clamping force of the workpiece, especially to prevent the deformation of the slender workpiece;

4. The X-axis of the grinding wheel frame is equipped with a grating ruler, which realizes the closed-loop control of feeding, measurement and processing, and ensures the processing accuracy well;

5. The upper worktable can be adjusted manually and rotates at a certain angle relative to the lower worktable, so as to realize cylindrical grinding with small taper;

6. The bed, worktable, grinding head body, headstock, tailstock, etc. of the machine tool are all made of high-performance inoculated cast iron, and processed through multiple aging treatments; Natural frequency, high rigidity, good precision retention of machine tools and stable performance.

Description of drawings:

Fig. 1 is the perspective view of the present invention;

Fig. 2 is the front view of the present invention;

Fig. 3 is the top view of the present invention;

Fig. 4 is the top view of the present invention after removing the large cover;

Figure 5 is a perspective view of the head frame;

Fig. 6 is the front view of the head frame;

Fig. 7 is the L-L direction sectional view of Fig. 6;

8 is a sectional view taken along the line I-I of FIG. 6;

Fig. 9 is the M-M direction sectional view of Fig. 6;

Figure 10 is a perspective view of the sleeve;

Figure 11 is a front view of the sleeve;

Fig. 12 is the schematic diagram of the I-I direction of the sleeve;

Figure 13 is a perspective view of the tailstock;

Figure 14 is a front view of the tailstock;

Fig. 15 is the sectional view taken along the line I-I of Fig. 14;

Figure 16 is a perspective view of a workbench;

Figure 17 is a front view of the workbench;

Figure 18 is a top view of the workbench;

Fig. 19 is the sectional view taken along the line I-I of Fig. 18;

Figure 20 is a schematic view of the structure of the grinding wheel frame;

Figure 21 is a front view of the grinding wheel;

Figure 22 is a top view of the grinding wheel;

Fig. 23 is the schematic diagram of the I-I direction of Fig. 22;

Figure 24 is the K-K direction schematic diagram of 22;

Figure 25 is a perspective view of a bed;

Figure 26 is a front view of the bed;

Fig. 27 is a sectional view taken along the line I-I of Fig. 26

Labels in the figure: 1-2 cover, 2-2 first spacer, 3-2 gland, 4-2 second spacer, 5-2 lock nut, 6-2, top, 7-2 fourth bearing , 8-2 outer spacer, 9-2 inner spacer, 10-2 third bearing, 11-2 headstock spindle, 12-2 nut, 13-2 screw, 14-2 support, 15-2 sixth Bearing, 16-2 fifth bearing, 17-2 sleeve, 18-2 air film ring, 19-2 second synchronous pulley, 20-2 first bearing, 21-2 second bearing, 22-2 dial , 6-1 head frame body, 23-2 key, 24-2 rear cover, 25-2 top cover, 26-2 first servo motor, 27-2 first motor connecting pull, 28-2 first synchronous belt Wheel, 29-2 front cover, 30-2 first timing belt, 2-3 top, 4-3 top cover, 6-3 adjustment handle, 7-3 spring, 8-3 tailstock body, 1-4 left Pressure plate, 2-4 upper worktable, 3-4 lower worktable, 4-4 right pressure plate, 5-4 dial indicator, 6-4 meter seat, 7-4 pair of watch rods, 8-4 connecting plate, 9- 4 screw, 1-5 grinding head bottom plate, 2-5 grinding head body, 3-5 linear rail, 4-5 motor, 5-5 second screw part, 6-5 backing plate, 7-5 main shaft, 8 -5 grinding wheel, 9-5 grinding wheel cover, 1-6 first screw part, 2-6 third synchronous pulley, 3-6 second synchronous belt, 4-6 second motor connecting plate, 5-6 fourth Synchronous pulley, 9-6 second servo motor, 11-6 bed, 12-chip conveyor, 1-1 large cover, 2-1 oil mist collector, 3-1 electrical box, 4-1 chip conveyor , 5-1 grinding wheel frame, 7-1 working table, 8-1 tailstock.

Detailed ways:

In order to deepen the understanding of the present invention, the present invention will be described in further detail below with reference to the embodiments and the accompanying drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

Figures 1-27 show the specific implementation of a new type of high-speed and high-precision CNC end-face cylindrical grinding machine: including a bed 11-6, a large cover 1-1, a motor box 3-1, a grinding wheel frame 5-1, The headstock body 6-1, the tailstock 8-1 and the worktable 7-1 are provided with a large cover 1-1, a grinding wheel frame 5-1, a headstock body 6-1, a tailstock on the bed 11-6 The frame 8-1 and the worktable 7-1, the head frame body 6-1 is equipped with a head frame spindle 11-2, and the outer circle of the front end of the head frame spindle 11-2 is equipped with a first bearing 20-2 and a first bearing 20-2. The second bearing 21-2 is then pressed by the locking nut 5-2, the air ring film 18-2 is sleeved on the headstock main shaft 11-2, and then installed into the sleeve 17-2, and the air ring film 18-2 is sleeved on the headstock main shaft 11-2, and then installed in the sleeve 17-2. A third bearing 10-2, an inner bearing spacer 9-2, an outer spacer 8-2, a fourth bearing 7-2 and a second synchronous pulley 19-2 are sequentially installed on the outer circle of the cylinder 17-2. The second synchronous pulley 19-2 is pressed by the dial 22-2 on which one end of the coupling key 23-2 is fixed, and the other end of the coupling key 23-2 is clamped on the head frame In the keyway of the main shaft 11-2, the second synchronous pulley 19-2 drives the headstock main shaft 11-2 to rotate through the dial 22-2 and the coupling key 23-2, and then the cover 1-2 is installed on the dial On 22-2, the fourth bearing 7-2 is pressed by the press cover 3-2, and the outer circle of the rear end of the headstock main shaft 11-2 is sleeved with a fifth bearing 16-2 and a sixth bearing 15- 2. The rear end is pressed by the support 14-2, and the first servo motor 26-2, the first motor connecting plate 27-2, the first synchronous pulley 28-2 and the The first synchronous belt 30-2, the first servo motor 26-2 drives the first synchronous pulley 28-2, the first synchronous belt 30-2 and the second synchronous pulley 19-2 to rotate, the second synchronous belt The pulley 19-2 drives the headstock spindle 11-2 to rotate through the dial 22-2 and the coupling key 23-2.

The rotation of the headstock realizes stepless speed change through the servo motor, and adopts a "dead" top structure (that is, the main shaft of the headstock does not rotate). The servo motor is driven by the synchronous belt, and then drives the dial 22-2 to rotate. Drive the workpiece to rotate. The motor is controlled by the servo motor driver to realize the stepless speed change of the workpiece. For the convenience of loading and unloading workpieces, the headstock has a precise stop function, the headstock sleeve is supported by dense ball bearings, and an air film ring is added in the middle of the headstock main shaft, so that a layer of air film is formed between the main shaft and the air film ring, so that the main shaft is in Suspended state, reducing bearing wear and improving spindle rotation accuracy;

The bed 11-6 is also provided with a chip conveyor 12 and a first screw member 1-6, and the worktable 7-1 is provided on the first screw member 1-6;

A second servo motor 9-6 is installed on the bed 11-6 through a second motor connecting plate 4-6, and a fourth synchronous pulley 5-6 is installed at the front end of the second servo motor 9-6 , the fourth synchronous pulley 5-6 is connected with the third synchronous pulley 2-6 through the second synchronous belt 3-6, and the third synchronous pulley 2-6 drives the first screw member 1-6 to rotate , the first screw member 1-6 drives the worktable 7-1 to move on the bed 11-6;

The grinding machine has a fully enclosed protective device; the machine tool protective device has a front sliding door and an observation window, and the protective door can be opened and closed manually. And equipped with lighting facilities for easy observation of the processing process;

The machine tool adopts an independent electric box (with air conditioner), the ball screw nut is equipped with a centralized lubrication system, and the cooling water tank has a two-stage filter device of magnetic separation and paper filter;

The tailstock 8-1 includes a tailstock body 8-3, a top cover 4-3, a top 2-3, a spring 7-3 and an adjusting handle 6-3, and the top cover 4-3 is mounted on the tailstock body In 8-3, a center 2-3 is installed at the front end of the center sleeve 4-3, and a spring 7-3 and an adjusting handle 6-3 are installed in the center sleeve 4-3 for workpiece clamping Force adjustment to prevent deformation of slender parts due to excessive clamping force;

The workbench 7-1 includes an upper workbench 2-4, a lower workbench 3-4, a left pressure plate 1-4, a right pressure plate 4-4, a dial indicator 5-4, a watch seat 6-4, and a counter bar. 7-4, connecting plate 8-4 and screw rod 9-4, one end of the screw rod 9-4 is installed on the connecting plate 8-4, and the other end is connected with the watch base 6-4, and works on the The two ends of the table 2-4 are clamped between the left pressing plate 1-4 and the right pressing plate 4-4, and one end of the upper work table 2-4 is connected with the screw rod 9-4 through the connecting plate 8-4. The connecting plate 8-4 is provided with a counter bar 7-4, the counter bar 7-4 presses the dial indicator 5-4, and the screw rod 9-4 is rotated to drive the upper worktable 2-4 to the left. Move between the pressing plate 1-4 and the right pressing plate 4-4, at this time, the counter bar 7 on the connecting plate 8-4 presses the dial indicator 5-4, and reads the rotating value; one end of the connecting plate 8-4 A circular arc surface is made, which is close to the circular arc surface on the right side of the upper workbench 2-4, and is fixed with the upper workbench 2-4.

The worktable adopts the upper and lower layer structure. The 2-4 table tops of the upper worktable are horizontal, so that the head and tailstock can be positioned on it more stably and rigidly. The upper table 2-4 can be manually adjusted to rotate a certain angle relative to the lower table, so as to achieve small taper cylindrical grinding. The table guide rail adopts "flat, V" plastic guide rail, which reduces the difference between the dynamic and static friction force of the guide rail. ;

The grinding wheel frame 5-1 includes a grinding head base plate 1-5, a grinding head body 2-5, a linear rail 3-5 and a grinding wheel 8-5. The grinding wheel 8-5 is fixed on the main shaft 7-5, and the main shaft is 7-5 is installed in the grinding head body 2-5, the grinding wheel cover 9-5 and the motor 4-5 are installed outside the grinding head body 2-5, and are fixed above the backing plate 6-5, on the backing plate A second screw member 5-5 and a line rail 3-5 are installed below 6-5, and the second screw member 5-5 is driven by a servo motor and moves back and forth on the grinding head base plate 1-5;

The straight rail inclined layout is adopted, and the axis of the grinding wheel forms an angle of 60 degrees with the axis of the head and tailstock, which can grind the outer circle and end face of the part at the same time; it can also cut into the outer circle of the grinding shaft part at one time, and can also realize longitudinal grinding. The worktable rotates at a certain angle to realize the small taper grinding of the shaft parts; the machine tool adopts CNC control to carry out two axes and two linkages: that is, the grinding wheel frame feed (X axis), the table movement (Z axis), The rotation of the headstock realizes the stepless speed change through the servo motor; the machine tool is equipped with an outer diameter measuring instrument and an axial positioning device, and the X-axis is equipped with a grating ruler, which realizes the closed-loop control of feeding, measurement and processing, and ensures the processing accuracy well;

The grinding wheel guide rail adopts heavy-duty roller linear guide, which has small friction coefficient, high precision, good rigidity, and good shock absorption, which can well ensure the stability and reliability of the grinding wheel feed (X axis). The X-axis is equipped with a grating ruler, which can realize the closed-loop control of the feed of the grinding wheel frame;

Grinding wheel dressing device:

The front grinding wheel dressing device is adopted, and through the linkage between the X axis and the Z axis, the dressing and compensation of various profiles of the grinding wheel are realized by interpolation, which ensures the consistency of the grinding state of the grinding wheel;

Feeding mechanism (grinding wheel frame, table drive mechanism):

The grinding wheel frame feed adopts NSK screw bearing and precision ball screw, and the table drive adopts NSK screw bearing and precision ball screw, which is connected with the servo motor through the synchronous belt to achieve precise feeding.

A first spacer 2-1 and a second spacer 4-2 are arranged between the sleeve 17-2 and the locking nut 5-2;

A nut 12-2 is installed at the tail of the headstock main shaft 11-2, which is tightened by a screw 13-2 installed on the support 14-2;

A front cover 29-2 is arranged at the front end of the head frame body 6-1, a rear cover 24-2 is arranged at the rear end, and a top cover 25-2 is arranged at the top;

A cover 1-2 is attached to the dial 22-2.

The invention adopts CNC control to carry out two axes and two linkages: that is, the grinding wheel frame feed (X axis), the table movement (Z axis), the headstock rotation is realized by the servo motor to realize stepless speed change; , The clamping force of the workpiece can be adjusted, especially to prevent the deformation of the slender workpiece; the X-axis of the grinding wheel frame feed is equipped with a grating ruler, which realizes the closed-loop control of feeding, measurement and processing, which ensures the processing accuracy well; the upper worktable can be adjusted manually It rotates at a certain angle relative to the lower worktable, so as to realize cylindrical grinding with small taper; the bed, worktable, grinding head body, headstock, tailstock, etc. of the machine tool are all made of high-performance inoculated cast iron, and have undergone multiple aging treatments. The high-value casting wall thickness greatly improves the natural frequency of the machine tool casting, high rigidity, good precision retention of the machine tool, and stable performance.

The invention adopts the servo motor to drive the synchronous belt to control the speed of the main shaft, and the servo performs precise closed-loop control on the basis of frequency conversion to achieve a more ideal effect. A layer of air film with a certain bearing effect is formed between them, and the main shaft is in a suspended state by relying on the air film to reduce bearing wear and improve the rotation accuracy of the main shaft; the use of springs on the tailstock can adjust the clamping force of the workpiece and prevent the deformation of the slender workpiece , to ensure the machining accuracy; there is an angle micro-adjustment mechanism on the worktable to achieve small taper cylindrical grinding, and the servo motor drive is used to ensure the smooth operation of the worktable.

Main accuracy comparison:

The applicant further declares that the present invention illustrates the implementation method and device structure of the present invention through the above-mentioned embodiments, but the present invention is not limited to the above-mentioned embodiments, that is, it does not mean that the present invention must rely on the above-mentioned method and structure to be implemented. Those skilled in the art should understand that any improvement of the present invention, the equivalent replacement of the selected implementation method of the present invention, the addition of steps, the selection of specific methods, etc., all fall within the scope of protection and disclosure of the present invention.

The present invention is not limited to the above-mentioned embodiments, and all manners that adopt structures and methods similar to those of the present invention to achieve the purpose of the present invention are within the protection scope of the present invention.

Claims (10)

1. A new type of high-speed and high-precision CNC end-face cylindrical grinding machine, comprising a bed (11-6), a large cover (1-1), a motor box (3-1), a grinding wheel frame (5-1), and a headstock body (6-1), a tailstock (8-1) and a workbench (7-1), the bed (11-6) is provided with a large cover (1-1) and a grinding wheel frame (5-1) , a headstock body (6-1), a tailstock (8-1) and a workbench (7-1), characterized in that: the headstock (6-1) is sleeved on the front section of the headstock spindle (11-2) , the first bearing (20-2) and the second bearing (21-2) are installed on the outer circle of the front end of the headstock main shaft (11-2), and then pressed by the lock nut (5-2), in the The headstock main shaft (11-2) is covered with an air film ring (18-2), which is then loaded into the sleeve (17-2). The three bearings (10-2), the bearing inner spacer (9-2), the outer spacer (8-2), the fourth bearing (7-2) and the second synchronous pulley (19-2), the The two synchronous pulleys (19-2) are pressed by the dial (22-2), and one end of the connecting key (23-2) is fixed on the dial (22-2). The connecting key (23-2) 2) The other end is clamped in the keyway of the headstock main shaft (11-2), and then the cover (1-2) is installed on the dial (22-2), and the fourth bearing (7-2) passes through the The gland (3-2) is pressed tightly, a fifth bearing (16-2) and a sixth bearing (15-2) are sleeved on the outer circle of the rear end of the headstock main shaft (11-2), and the rear end passes through the support The seat (14-2) is pressed tightly, and the first servo motor (26-2), the first motor connecting plate (27-2) and the first synchronous pulley (28) are installed in the head frame body (6-1). -2) and the first timing belt (30-2), the first servo motor (26-2) drives the first timing pulley (28-2), the first timing belt (30-2) and the second timing belt (30-2) The pulley (19-2) rotates, and the second synchronous pulley (19-2) drives the headstock spindle (11-2) to rotate through the dial (22-2) and the coupling key (23-2). 2. A novel high-speed and high-precision CNC end-face cylindrical grinding machine according to claim 1, characterized in that: a chip conveyor (12) and a first screw rod are also provided on the bed (11-6) Part (1-6), the worktable (7-1) is arranged on the first screw part (1-6). 3. A novel high-speed and high-precision CNC end face cylindrical grinding machine according to claim 2, characterized in that: a second motor connecting plate (4-6) is installed on the bed (11-6) Two servo motors (9-6), a fourth synchronous pulley (5-6) is installed at the front end of the second servo motor (9-6), and the fourth synchronous pulley (5-6) passes through the The second synchronous belt (3-6) is connected with a third synchronous pulley (2-6), the third synchronous pulley (2-6) drives the first screw member (1-6) to rotate, the first The screw component (1-6) drives the worktable (7-1) to move on the bed (11-6). 4. A novel high-speed and high-precision CNC end face cylindrical grinding machine according to claim 1, characterized in that: the tailstock (8-1) comprises a tailstock body (8-3), a center sleeve (4-3) ), a center (2-3), a spring (7-3) and an adjustment handle (6-3), the center sleeve (4-3) is installed in the tailstock body (8-3), in the center The front end of the sleeve (4-3) is installed with a center (2-3), and a spring (7-3) and an adjusting handle (6-3) are installed in the center sleeve (4-3) for the workpiece clamp Tightening force adjustment prevents slender parts from being deformed due to excessive clamping force, which affects the machining accuracy of the workpiece. 5. A novel high-speed and high-precision CNC end face cylindrical grinding machine according to claim 1, characterized in that: the worktable (7-1) comprises an upper worktable (2-4), a lower worktable (3- 4), left pressure plate (1-4), right pressure plate (4-4), dial indicator (5-4), table base (6-4), counter bar (7-4), connecting plate (8- 4) and the screw rod (9-4), one end of the screw rod (9-4) is installed on the connecting plate (8-4), the other end is connected with the watch seat (6-4), the left pressure plate (1-4) and the inner side of the right pressure plate (4-4) are provided with arc surfaces, which are respectively fixed on the lower worktable (3-4), and the two ends of the upper worktable (2-4) are clamped on the upper worktable (2-4). In the annular groove between the left pressing plate (1-4) and the right pressing plate (4-4), the upper worktable (2-4) can rotate in the annular groove, and one end of the connecting plate (8-4) is provided with The arc surface is close to the arc surface on the right side of the upper worktable (2-4), and is fixed with the upper worktable (2-4), and one end of the upper worktable (2-4) passes through the connecting plate (8-4) is connected with the screw rod (9-4), and a pair of watch bars (7-4) is arranged on the connecting plate (8-4), and the pair of watch bars (7-4) presses the Separate the table (5-4), rotate the screw rod (9-4), and drive the upper worktable (2-4) into the annular groove between the left pressure plate (1-4) and the right pressure plate (4-4) Rotate, at this time, the counter bar (7) on the connecting plate (8-4) presses the dial indicator (5-4), and the rotating value is read out. 6. A new type of high-speed and high-precision CNC end face cylindrical grinding machine according to claim 1, characterized in that: the grinding wheel frame (5-1) comprises a grinding head base plate (1-5), a grinding head body (2- 5), line rail (3-5) and grinding wheel (8-5), the grinding wheel (8-5) is fixed on the main shaft (7-5), and the main shaft (7-5) is installed on the grinding head body ( 2-5), the grinding head body (2-5) is equipped with a grinding wheel cover (9-5) and a motor (4-5), and is fixed on the top of the backing plate (6-5). A second screw member (5-5) and a line rail (3-5) are installed under the plate (6-5), and the second screw member (5-5) is driven by a servo motor, and is driven by a servo motor. Move back and forth on the head base plate (1-5). 7. A novel high-speed and high-precision CNC end face cylindrical grinding machine according to claim 1, characterized in that: a first spacer is provided between the sleeve (17-2) and the locking nut (5-2). ring (2-2) and second spacer ring (4-2). 8. A new type of high-speed and high-precision CNC end face cylindrical grinder according to claim 1, characterized in that: a nut (12-2) is installed at the tail of the headstock spindle (11-2), which is installed on the Tighten the screws (13-2) on the support (14-2). 9. A novel high-speed and high-precision CNC end face cylindrical grinding machine according to claim 1, characterized in that: a front cover (29-2) is provided at the front end of the headstock body (6-1), and a rear end is provided with a front cover (29-2). A rear cover (24-2) is provided, and a top cover (25-2) is provided on the top. 10. A novel high-speed and high-precision CNC end face cylindrical grinding machine according to claim 1, characterized in that: a cover (1-2) is installed on the dial (22-2).

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