阅读说明：本技术 一种机械加工动力主轴头装置 (Machining power spindle head device ) 是由 卜庆团 于 2019-09-05 设计创作，主要内容包括：本发明公开了一种机械加工动力主轴头装置,包括均具有轴向偏心孔空心结构的转子轴、机械主轴和机械主轴延长段,高速电主轴设置在转子轴前端的偏心孔内,刀具固定安装在高速电主轴的前端；机械主轴带动整个装置绕轴心O<Sub>0</Sub>低速旋转,高速电主轴带动刀具绕轴心O<Sub>2</Sub>相对高速旋转,两者共同运动完成切削和进给运动；力矩电机驱动转子轴绕轴心O<Sub>1</Sub>在机械主轴的偏心孔内旋转来调整刀具径向方向的加工范围。本机械加工动力主轴头装置能够在保证径向、轴向具有较高刚性的同时实现较小的径向和轴向尺寸,且具有较高的径向调整精度、更紧凑合理的结构,特别适用于大型零部件的圆孔、锥孔、异形孔机械加工。(The invention discloses a mechanical processing power main shaft head device, which comprises a rotor shaft, a mechanical main shaft and a mechanical main shaft extension section, wherein the rotor shaft, the mechanical main shaft and the mechanical main shaft extension section are all provided with axial eccentric hole hollow structures; the mechanical main shaft drives the whole device to rotate around the axis O 0 The low-speed rotation and high-speed electric spindle drives the cutter to rotate around the axis O 2 The cutting and feeding motion is completed by the joint motion of the two parts; torque motor driven rotor shaft around axis O 1 Rotating in the eccentric hole of the mechanical main shaft to adjust the processing range of the radial direction of the cutter. The machining power spindle head device can realize smaller radial and axial sizes while ensuring higher rigidity in radial and axial directions, and has higher radial adjustment precision and more compact and reasonable structureThe structure is particularly suitable for machining round holes, taper holes and special-shaped holes of large parts.)

1. A mechanical processing power main shaft head device is characterized by comprising a high-speed electric main shaft (2), a rotor shaft (3), a mechanical main shaft (6), a main shaft box (7) and a mechanical main shaft extension section (13);

the rotor shaft (3) is provided, the mechanical main shaft (6) and the mechanical main shaft extension section (13) are both of hollow structures with axial eccentric holes, the front end face of the mechanical main shaft extension section (13) is fixedly connected with the rear end face of the mechanical main shaft (6), the front part of the inner surface of the mechanical main shaft extension section (13) is provided with a braking inner ring, the outer surfaces of the mechanical main shaft (6) and the mechanical main shaft extension section (13) are erected on the inner surface of a main shaft box (7) through a bearing group, the front end cover plate (4) arranged along the radial direction is arranged on the front end face of the main shaft box (7), the front part of a rotor shaft (3) is connected onto the front end cover plate (4) in a penetrating manner, the rear end cover plate (19) arranged along the radial direction is arranged on the rear end face of the main shaft box (7), the rear part of the mechanical main shaft extension section (13) is connected onto the rear end cover plate (19) in a;

the front part of the outer surface of the rotor shaft (3) is connected with the front part of the inner surface of the mechanical main shaft (6) through an end face bearing (5), a torque motor rotor (9) is fixedly installed in the middle of the outer surface of the rotor shaft (3), a band-type brake (14) arranged along the circumferential direction is arranged at the position, corresponding to a braking inner ring of the mechanical main shaft extension section (13), of the rear part of the outer surface of the rotor shaft (3), a circular grating (28) arranged along the circumferential direction is further arranged at the position, located behind the band-type brake (14), of the rear part of the outer surface of the rotor shaft (3), a grating reading head (16) is fixedly arranged at the position, corresponding to the circular grating (28), of the inner surface of the mechanical main shaft extension section (13), and a grating signal line (22) and an electric main shaft power signal;

a torque motor stator (10) sleeved on the torque motor rotor (9) is fixedly installed at the position, opposite to the stress torque motor rotor (9), on the inner surface of the mechanical spindle (6), and a torque motor power signal line (31) penetrates through the mechanical spindle extension section (13) and is led out from the rear;

the high-speed electric spindle (2) is arranged in an eccentric hole at the front end of the rotor shaft (3) and is fixedly connected with the front end face of the rotor shaft (3) through a flange, and the cutter (1) is fixedly arranged at the front end of the high-speed electric spindle (2).

2. The machining power spindle head device according to claim 1, wherein a positioning step is further arranged on the outer surface of the mechanical spindle extension section (13), the mechanical spindle extension section (13) is matched and positioned with a slip ring support (20) fixedly mounted on a rear end cover plate (19) through a slip ring I (21) arranged on the positioning step, and a grating signal line (22) and an electric spindle power signal line (23) are led out from the rear of the slip ring I (21); a slip ring II (26) positioned through a cover plate (25) is arranged in an eccentric hole of the mechanical spindle extension section (13), and a torque motor power signal wire (31) penetrates through the mechanical spindle extension section (13) and is led out from the rear of the slip ring II (26).

3. The machining power spindle head device according to claim 1 or 2, wherein the bearing set between the outer surfaces of the mechanical spindle (6) and the mechanical spindle extension section (13) and the inner surface of the spindle box (7) comprises a front end bearing set (8), a bearing adjusting sleeve (11), a bearing sleeve (12) and a rear end bearing set (15), the front end of the inner ring of the front end bearing set (8) abuts against the positioning step on the outer surface of the mechanical spindle (6), the rear end of the inner ring of the rear end bearing set (15) abuts against the front end of the inner ring of the mechanical spindle (6) through the bearing sleeve (12) sleeved on the outer surface of the mechanical spindle (6), the front end of the outer ring of the front end bearing set (8) abuts against the positioning step on the inner surface of the spindle box (7), and the rear end of the inner ring of the rear end bearing set (15) abuts against the front end of the outer ring through the bearing adjusting sleeve (11) sleeved on the inner surface of the spindle box (, the rear end of the inner ring and the rear end of the outer ring of the rear end bearing group (15) are respectively abutted against the front end surface of the rear end cover plate (19).

4. A machining power spindle head device according to claim 3, characterized in that the bearing set between the outer surfaces of the mechanical spindle (6) and the mechanical spindle extension (13) and the inner surface of the spindle box (7) further comprises a lock nut (17), the rear end of the inner ring of the rear end bearing set (15) abuts against the front end surface of the lock nut (17) which is in threaded connection with the outer surface of the mechanical spindle extension (13) through the mechanical spindle extension (13-1), and a spindle box adjusting sleeve (18) is further arranged between the rear end surface of the spindle box (7) and the rear end cover plate (19).

5. A machining power spindle head device according to claim 1 or 2, characterized in that the band-type brake (14) is a hydraulic control band-type brake, a hydraulic oil path (30) is arranged in the rotor shaft (3) corresponding to the position in the band-type brake (14), and a hydraulic oil pipe (24) connected with the hydraulic oil path (30) is led out from the rear inside the extension section (13) of the machine spindle.

6. A machine tool power spindle head assembly according to claim 1 or 2, wherein a seal ii (32) is provided between the position where the rotor shaft (3) is inserted into the front end cover plate (4) and the front end cover plate (4), and a seal i (29) is provided between the position where the extended section (13) of the machine spindle is inserted into the rear end cover plate (19) and the rear end cover plate (19).

Technical Field

The invention relates to a power spindle head device, in particular to a mechanical processing power spindle head device which is suitable for mechanical processing of round holes, taper holes and special-shaped holes of parts such as cylinder bodies, connecting rods and other box bodies, and belongs to the technical field of mechanical processing.

Background

The processing technology and the processing quality of key holes of parts in the machining process directly influence the use performance of the parts, for example, key holes such as bearing holes, connecting holes and the like of cylinder holes, connecting rod holes and other parts such as boxes are generally cylindrical holes or step holes, the key process usually adopts a boring technology, and the key holes with higher requirements on surface finish also adopt a grinding process.

The traditional boring process has the characteristics of low rotating speed and low feeding amount, particularly, a single-tooth boring cutter is used for carrying out fine machining on parts in a point contact machining mode, the defect of low efficiency exists, and feeding tool marks are left on the surface of a machined hole; moreover, the traditional boring process and equipment are not suitable for machining special-shaped holes of taper holes, conical surfaces and other parts, machine tool equipment and special tools are usually required to be additionally input according to the size change of the aperture of a workpiece, the machining process flow and the operation intensity are increased, and the overall production efficiency is low.

For a workpiece with a large aperture, when a tool or a grinding wheel with a small diameter is used for machining an inner hole and an outer circle of the workpiece, a linear axis numerical control interpolation mode is generally adopted in the circumferential direction, the numerical control facing head of a machine tool or a boring cutter with a radial compensation function is generally adopted in the linear axis numerical control interpolation mode, but the numerical control facing head is usually large in size and poor in dynamic balance effect, so that the machining speed is low and the boring cutter with the radial compensation function is not suitable for high-speed machining, and precision loss and unstable compensation of a mechanical transmission part of the machine tool are easily caused due to the influence of mechanism clearance and elastic deformation, and the compensation range is small, so that the traditional linear axis numerical control interpolation mode is easily caused to be low in roundness of a forming hole and low in coaxiality of a stepped hole.

In addition, when the outer circle of a large-scale revolving body workpiece is machined, a vertical lathe is generally adopted for machining the outer circle or the outer cone, a cutter is kept still, the workpiece is fed in a revolving mode through a main shaft, machining efficiency is low, roughness is poor, the machining is performed on large-scale parts with large overall dimensions and heavy weight, the traditional machining clamping mode is difficult due to large rotational inertia, and machining accuracy of the traditional machining clamping mode is low.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a machining power spindle head device which can realize smaller radial and axial sizes while ensuring higher rigidity in the radial and axial directions, has higher radial adjustment precision and a more compact and reasonable structure, and is particularly suitable for machining round holes, taper holes and special-shaped holes of large parts.

The mechanical processing power spindle head device comprises a high-speed electric spindle, a rotor shaft, a mechanical spindle, a spindle box and a mechanical spindle extension section;

the rotor shaft, the mechanical spindle and the mechanical spindle extension section are all of hollow structures with axial eccentric holes, the front end face of the mechanical spindle extension section is fixedly connected with the rear end face of the mechanical spindle, the front part of the inner surface of the mechanical spindle extension section is provided with a braking inner ring, the outer surfaces of the mechanical spindle and the mechanical spindle extension section are erected on the inner surface of the spindle box through a bearing group, the front end face of the spindle box is provided with a front end cover plate arranged along the radial direction, the front part of the rotor shaft is connected onto the front end cover plate in a penetrating manner, the rear end face of the spindle box is provided with a rear end cover plate arranged along the radial direction, the rear part of the mechanical spindle extension section is connected onto the rear end cover plate in a penetrating manner, and;

the front part of the outer surface of the rotor shaft is connected with the front part of the inner surface of the mechanical main shaft through an end face bearing, a torque motor rotor is fixedly installed in the middle of the outer surface of the rotor shaft, a band-type brake arranged along the circumferential direction is arranged at the position, corresponding to a braking inner ring of the mechanical main shaft extension section, of the rear part of the outer surface of the rotor shaft, a circular grating arranged along the circumferential direction is further arranged at the position, located behind the band-type brake, of the rear part of the outer surface of the rotor shaft, a grating reading head is fixedly arranged at the position, corresponding to the circular grating, of the inner surface of the mechanical main shaft extension section, and a;

a torque motor stator sleeved on the torque motor rotor is fixedly installed on the inner surface of the mechanical main shaft opposite to the position of the stress torque motor rotor, and a torque motor power signal wire penetrates through the mechanical main shaft extension section and is led out from the rear;

the high-speed electric main shaft is arranged in an eccentric hole at the front end of the rotor shaft and is fixedly connected with the front end surface of the rotor shaft through a flange, and the cutter is fixedly arranged at the front end of the high-speed electric main shaft.

As a further improvement scheme of the invention, the outer surface of the mechanical main shaft extension section is also provided with a positioning step, the mechanical main shaft extension section is matched, positioned and connected with a slip ring bracket fixedly arranged on a rear end cover plate through a slip ring I arranged on the positioning step, and a grating signal line and an electric main shaft power signal line are led out from the rear of the slip ring I; a slip ring II positioned through a cover plate is arranged in an eccentric hole of the mechanical spindle extension section, and a torque motor power signal wire penetrates through the mechanical spindle extension section and is led out from the rear of the slip ring II.

As a further improvement of the present invention, the bearing set between the outer surface of the mechanical spindle and the extension section of the mechanical spindle and the inner surface of the spindle box includes a front end bearing set, a bearing adjusting sleeve, a bearing sleeve and a rear end bearing set, the front end of the inner ring of the front end bearing set abuts against the positioning step on the outer surface of the mechanical spindle, the rear end of the inner ring of the rear end bearing set abuts against the front end of the inner ring of the rear end bearing set through the bearing sleeve sleeved on the outer surface of the mechanical spindle, the front end of the outer ring of the front end bearing set abuts against the positioning step on the inner surface of the spindle box, the rear end of the outer ring of the front end bearing set abuts against the front end of the outer ring of the rear end bearing set through the bearing adjusting sleeve sleeved on the inner surface of the spindle box, and the rear ends of the.

As a further improvement of the present invention, the bearing set between the outer surfaces of the mechanical spindle and the mechanical spindle extension section and the inner surface of the spindle box further comprises a lock nut, the rear end of the inner ring of the rear end bearing set abuts against the front end surface of the lock nut connected with the outer surface of the mechanical spindle extension section through the mechanical spindle extension section, and a spindle box adjusting sleeve is further disposed between the rear end surface of the spindle box and the rear end cover plate.

According to the preferable scheme of the invention, the band-type brake is a hydraulic control band-type brake, a hydraulic oil path is arranged in the rotor shaft corresponding to the position in the band-type brake, and a hydraulic oil pipe connected with the hydraulic oil path is led out from the rear part in the extension section of the mechanical spindle.

As a further improvement scheme of the invention, a sealing piece II is arranged between the position where the rotor shaft is connected on the front end cover plate in a penetrating manner and the front end cover plate, and a sealing piece I is arranged between the position where the mechanical main shaft extension section is connected on the rear end cover plate in a penetrating manner and the rear end cover plate.

Compared with the prior art, the mechanical processing power main shaft head device is provided with a rotor shaft, a mechanical main shaft and a mechanical main shaft extension section, wherein the rotor shaft, the mechanical main shaft and the mechanical main shaft extension section are all provided with axial eccentric hole hollow structures, the high-speed electric main shaft is arranged in an eccentric hole at the front end of the rotor shaft, the cutter is fixedly arranged at the front end of the high-speed electric main shaft, the torque motor rotor is fixedly arranged in the middle of the outer surface of the rotor shaft, the band-type brake and the circular grating are arranged at the rear part of the outer surface of the rotor shaft, the grating reading head is arranged on the inner surface of the mechanical main shaft extension section, and the torque motor stator sleeved on the torque motor rotor is fixedly arranged on₀The low-speed rotation and high-speed electric spindle drives the cutter to rotate around the axis O₂The high-speed electric spindle drives a cutter to realize high-speed cutting machining, and further realizes a machining process of replacing boring by milling or grinding; driving rotor shaft around axis O by adjusting torque motor₁The relative distance between the axis of the high-speed electric spindle and the axis of the mechanical spindle can be changed by rotating in the eccentric hole of the mechanical spindle, so that the processing range of the radial direction of the cutter can be adjusted; the mechanical main shaft, the torque motor and the high-speed electric main shaft can move continuously, and further, the combined machining of the taper hole and the special-shaped hole of the part by milling instead of boring or by grinding instead of boring can be carried out; meanwhile, the radial and axial dimensions can be smaller while higher rigidity in the radial and axial directions is ensured, and the device has higher radial adjustment precision and a more compact and reasonable structure, and is particularly suitable for machining round holes, taper holes and special-shaped holes of large parts.

Drawings

FIG. 1 is a schematic view of the present invention;

FIG. 2 is a schematic structural view of the present invention;

FIG. 3 is O₀And O₂A schematic diagram of coordinate coincidence;

FIG. 4 shows rotor shaft 3 wound around O₁After rotating O₀And O₂A schematic diagram of the separation of the coordinates;

FIG. 5 shows rotor shaft 3 wound around O₁Rotated 90 degrees and then rotated O₀And O₂A schematic diagram of coordinates;

FIG. 6 shows rotor shaft 3 wound around O₁Rotated by 180 degrees to form₀And O₂A schematic diagram of coordinates;

FIG. 7 is a schematic structural diagram of the present invention for milling and boring a straight bore;

FIG. 8 is a schematic structural diagram of the present invention for milling and boring an inclined inner bore;

FIG. 9 is a schematic structural view of the turning and milling combined machining apparatus of the present invention;

FIG. 10 is a schematic view of the turning of the present invention;

FIG. 11 is a schematic view of the boring of the present invention;

FIG. 12 is a schematic view of the structure of the present invention during a grinding and boring process.

Sequence numbers and names in the figures: 1. a cutter, 2, an electric spindle, 3, an electric spindle sleeve, 4, a front end cover plate, 5, an end face bearing, 6, a mechanical spindle, 7, a spindle box, 8, a front end bearing group, 9, a torque motor rotor, 10, a torque motor stator, 11, a bearing adjusting sleeve, 12, a bearing sleeve, 13, a mechanical spindle extension section, 13-1, a mechanical spindle extension section thread, 13-2, a mechanical spindle extension section belt wheel, 14, a band-type brake, 15, a rear end bearing group, 16, a grating reading head, 17, a locking nut, 18, a spindle box adjusting sleeve, 19, a rear end cover plate, 20, a slide ring bracket, 21, a slide ring I, 22, a grating signal wire, 23, an electric spindle power and signal wire, 24, a hydraulic oil pipe, 25, a cover plate, 26, a slide ring II, 27, a slide ring leading-out wire, 28, a circular grating, 29, a sealing piece, 30, a hydraulic oil circuit, 31, a torque motor power wire, 32. and a seal.

O₀Is the axis coordinate, O, of the mechanical spindle 6₁Is the axis coordinate, O, of the rotor shaft 3₂Is the axis coordinate of the tool 1 and the high-speed electric spindle 2.

Detailed Description

The present invention will be further explained with reference to the drawings (hereinafter, the direction in which the tool 1 is mounted on the power spindle head apparatus for machining will be described as the front).

As shown in fig. 1 and 2, the mechanical processing power spindle head device comprises a high-speed electric spindle 2, a rotor shaft 3, a mechanical spindle 6, a spindle head 7 and a mechanical spindle extension section 13.

The rotor shaft 3, the mechanical spindle 6 and the mechanical spindle extension section 13 are all of hollow structures with axial eccentric holes, the front end face of the mechanical spindle extension section 13 is fixedly connected with the rear end face of the mechanical spindle 6, the front part of the inner surface of the mechanical spindle extension section 13 is provided with a brake inner ring, the outer surfaces of the mechanical spindle 6 and the mechanical spindle extension section 13 are erected on the inner surface of the spindle box 7 through a bearing set, the front end face of the spindle box 7 is provided with a front end cover plate 4 arranged along the radial direction, the front part of the rotor shaft 3 is connected onto the front end cover plate 4 in a penetrating manner, the rear end face of the spindle box 7 is provided with a rear end cover plate 19 arranged along the radial direction, the rear part of the mechanical spindle extension section 13 is connected onto the rear end cover plate 19 in a penetrating manner, and the rear end of.

The front part of the outer surface of the rotor shaft 3 is connected with the front part of the inner surface of the mechanical main shaft 6 through the end face bearing 5, the middle part of the outer surface of the rotor shaft 3 is fixedly provided with a torque motor rotor 9, the position of the rear part of the outer surface of the rotor shaft 3, corresponding to the braking inner ring of the mechanical main shaft extension section 13, is provided with a band-type brake 14 arranged along the circumferential direction, the band-type brake 14 can be pushed out along the radial direction to tightly clamp the braking inner ring of the mechanical main shaft extension section 13 to realize braking by controlling the action of the band-type brake 14, the rear part of the outer surface of the rotor shaft 3 and the position at the rear part of the band-type brake 14 are also provided with a circular grating 28 arranged along the circumferential direction, the position of the inner surface of the mechanical main shaft extension section 13, corresponding to.

The torque motor stator 10 sleeved on the torque motor rotor 9 is fixedly installed on the inner surface of the mechanical main shaft 6 opposite to the position of the stress torque motor rotor 9, and a torque motor power signal line 31 penetrates through the mechanical main shaft extension section 13 and is led out from the rear.

The high-speed electric main shaft 2 is arranged in an eccentric hole at the front end of the rotor shaft 3 and is fixedly connected with the front end surface of the rotor shaft 3 through a flange, and the cutter 1 is fixedly arranged at the front end of the high-speed electric main shaft 2.

In order to prevent the grating signal line 22 or the electric spindle power signal line 23 from winding caused by the rotation of the high-speed electric spindle 2 or the rotor shaft 3 or the mechanical spindle 6 when the mechanical processing power spindle head device works, as a further improvement scheme of the invention, the outer surface of the mechanical spindle extension section 13 is also provided with a positioning step, the mechanical spindle extension section 13 is matched and positioned with a slip ring bracket 20 fixedly arranged on the rear end cover plate 19 through a slip ring I21 arranged on the positioning step, and the grating signal line 22 and the electric spindle power signal line 23 are led out from the rear part of the slip ring I21; a slip ring II 26 positioned through a cover plate 25 is arranged in an eccentric hole of the mechanical spindle extension section 13, and a torque motor power signal wire 31 penetrates through the mechanical spindle extension section 13 and is led out from the rear of the slip ring II 26.

In order to reduce the number of bearing sets on the basis of stably positioning and installing the mechanical main shaft 6 and the mechanical main shaft extension section 13 on the inner surface of the main shaft box 7 in the axial direction and the radial direction, as a further improvement scheme of the invention, the bearing set between the outer surfaces of the mechanical main shaft 6 and the mechanical main shaft extension section 13 and the inner surface of the main shaft box 7 comprises a front end bearing set 8, a bearing adjusting sleeve 11, a bearing sleeve 12 and a rear end bearing set 15, the front end of an inner ring of the front end bearing set 8 abuts against a positioning step on the outer surface of the mechanical main shaft 6, the rear end of the inner ring of the rear end bearing set 15 abuts against and is connected with the front end of the inner ring of the rear end bearing set 15 through the bearing adjusting sleeve 11 sleeved on the inner surface of the main shaft box 7, the front end of an outer ring of the front end bearing set 8 abuts against the positioning step on the inner surface of the main shaft box 7, the rear end of the inner ring and the rear end of the outer ring of the rear end bearing group 15 are both abutted against the front end surface of the rear end cover plate 19; the mechanical spindle 6 and the mechanical spindle extension 13 can be fixedly and axially and radially positioned and mounted on the inner surface of the spindle box 7 by arranging the bearing adjusting sleeve 11 and the bearing sleeve 12 with different length sizes according to the mechanical spindle 6 and the mechanical spindle extension 13 with different axial sizes.

In order to facilitate the adjustment of the radial pre-tightening force of the bearing group between the outer surfaces of the mechanical main shaft 6 and the mechanical main shaft extension section 13 and the inner surface of the main shaft box 7, as a further improvement scheme of the invention, the bearing group between the outer surfaces of the mechanical main shaft 6 and the mechanical main shaft extension section 13 and the inner surface of the main shaft box 7 further comprises a lock nut 17, the rear end of the inner ring of the rear end bearing group 15 abuts against the front end surface of the lock nut 17 connected with the outer surface of the mechanical main shaft extension section 13 through the mechanical main shaft extension section thread 13-1, and a main shaft box adjusting sleeve 18 is further arranged between the rear end surface of the main shaft box 7 and a rear end cover plate 19; the radial pretightening force of the bearing group between the outer surfaces of the mechanical spindle 6 and the mechanical spindle extension section 13 and the inner surface of the spindle box 7 can be adjusted by adjusting the screwing force of the locking nut 17 and the thickness dimension of the spindle box adjusting sleeve 18 in the front-back direction.

The band-type brake 14 can be controlled electrically or hydraulically, and the torque output of the latter is more stable and can prevent the motor from being damaged, so that the preferred scheme of the invention is that the band-type brake 14 is a hydraulically controlled band-type brake, a hydraulic oil line 30 is arranged in the rotor shaft 3 corresponding to the position in the band-type brake 14, and a hydraulic oil pipe 24 connected with the hydraulic oil line 30 is led out from the rear part in the mechanical main shaft extension section 13.

In order to prevent external impurities from entering the main spindle box 7, as a further improvement of the invention, a sealing piece II 32 is arranged between the position where the rotor shaft 3 is connected to the front end cover plate 4 in a penetrating mode and the front end cover plate 4, and a sealing piece I29 is arranged between the position where the mechanical spindle extension section 13 is connected to the rear end cover plate 19 in a penetrating mode and the rear end cover plate 19.

In the working process of the mechanical processing power spindle head device, workpieces are kept relatively fixed, as shown in the radial adjustment of the cutting point of a cutter in the figures 3 to 6, as shown in the figures 7 and 8, the extension belt wheel 13-2 of the mechanical spindle drives the mechanical spindle 6 to drive the whole device to rotate around the axis O₀The low-speed rotation, high-speed electric main shaft 2 drives the cutter 1 around the axis O₂The high-speed rotation of the two parts can be realized by the same motion of cutting and feeding, the coaxiality and the roundness of the hole of the part to be processed can be ensured by the low-speed rotation feeding motion of the precision mechanical main shaft, and the high-speed electric main shaft is used for driving a cutter to be realThe high-speed cutting machining is carried out, and then the machining process of replacing boring by milling or grinding is realized.

The torque motor comprising a torque motor rotor 9 and a torque motor stator 10 drives the rotor shaft 3 around the axis O according to the angle instruction₁The tool 1 is rotated in the eccentric hole of the machine spindle 6 to change the relative distance between the axis of the high-speed electric spindle 2 and the axis of the machine spindle 6, thereby adjusting the processing range in the radial direction of the tool 1.

The mechanical main shaft 6, the torque motor and the high-speed electric main shaft 2 can move continuously, and further, the compound machining of milling and boring instead or grinding and boring instead of part taper holes and special-shaped holes can be carried out.