CN102366889A - Automatic high-speed precision numerical control machine tool for cutting spherical surface - Google Patents

Abstract

Provided is a high-speed precision automatic numerical control machine tool for spherical cutting, which has a base, a spindle device is provided on one side of the upper part of the base, and a saddle carriage for rectilinear reciprocating motion along the spindle axis of the spindle device is installed on the upper part of the base on the same side of the spindle device device, the saddle carriage device is provided with a direct-drive torque motor turntable device and the rotation axis of the direct-drive torque motor turntable device and the rotation axis of the spindle device are absolutely intersected in space, and the upper end of the direct-drive torque motor turntable device Connect with the rotary saddle device and drive the rotary saddle device to rotate and reciprocate around the axis of the direct-drive torque motor rotary table device. The frame carriage device, the linear motion of the tool holder carriage device and the rotary motion of the rotary saddle device constitute the cutting motion to the workpiece so that the workpiece clamped at the front end of the spindle device is cut into a true spherical shape.

Description

High-speed precision automatic CNC machine tool for spherical cutting

technical field

The invention relates to the technical field of machine tool manufacturing, in particular to a high-speed precision automatic numerical control machine tool for spherical cutting.

Background technique

In industries such as sanitary ware and automobiles, high-precision spherical parts that require a contour of 2 μm and a smoothness of 0.4 μm are often encountered. According to the traditional processing conditions in the past, such parts often need to be roughed by ordinary cars----whirlwind milling Ball (or ordinary CNC car ball)----CNC whirlwind grinding spherical surface----Manual polishing and other processes, even if the process control is very strict, the defective rate and scrap rate are relatively high, and due to the processing It is cumbersome and the work efficiency is not high. There are two main reasons: one is that the CNC lathe processes the spherical shape according to the principle of CNC interpolation. To form the required shape, it is precisely because of the alternate feeding of the two axes that the spherical curve formed is actually composed of many small broken lines, and ordinary CNC lathes require an arc tool to process the spherical surface, and the cutting point of the tool in the process needs to be cut. It is always tangent to the processed spherical curve, so the cutting point on the tool is actually constantly changing, which requires strict control of the shape of the tool, and the accuracy of the current tool cannot meet such high precision requirements due to various factors. The chamfers at both ends cannot be turned with arc tools, and need to be turned around for processing; the second is that during spherical cyclone grinding, two or more sand bars to be trimmed are in contact with the processed spherical surface. If the trimmed sand bars and the center of the workpiece are Miscoincidence will cause roundness to drop, and the sand bars are threshing fast. Each time the sand bars are trimmed, they can’t grind a few workpieces. The mature spherical grinding machines on the market can only achieve 5μm accuracy. Overall, the accuracy and efficiency are not good. Satisfactorily, the above-mentioned defects have greatly limited the processing and application of spherical parts, so it is necessary to improve.

Contents of the invention

The technical problem solved by the present invention is to provide a high-speed precision automatic CNC machine tool for spherical cutting, so that the irregular arc and complicated processing steps caused by the interpolation cutting of the two-axis lathe are fundamentally solved, and the spherical parts are realized. High precision and high efficiency during processing, and low noise during transmission, which effectively improves work efficiency and solves the technical problem that it is difficult to achieve high roundness when processing spherical parts.

The technical solution adopted in the present invention: a high-speed precision automatic numerical control machine tool for spherical cutting, with a base, the upper side of the base is provided with a main shaft device, and the upper part of the base is located on the same side of the main shaft device and is installed with a linear reciprocating machine along the main shaft axis of the main shaft device A moving saddle carriage device, the saddle carriage device is provided with a direct-drive torque motor turntable device and the rotation axis of the direct-drive torque motor turntable device and the rotation axis of the spindle device intersect absolutely in space, so The upper end of the direct drive torque motor turntable device is connected to the rotary saddle device and drives the rotary saddle device to rotate and reciprocate around the axis of the direct drive torque motor turntable device. The main shaft axis of the device is perpendicular to the tool post carriage device that performs linear reciprocating motion. The linear motion of the tool post carriage device and the rotary motion of the rotary saddle device constitute the cutting motion of the workpiece so that the workpiece clamped at the front end of the main shaft device It is cut into a true spherical shape.

Wherein, the direct-drive torque motor turntable device includes a turntable housing and a turntable shaft, the upper end of the turntable shaft is supported in the turntable housing by a YRT bearing, and the lower end of the turntable shaft is supported by a bearing. The rotor of the motor is set, the stator of the motor is arranged in the casing of the turntable, and the upper end of the shaft body of the turntable is fixedly connected with the rotary saddle device.

Further, the lower end of the turntable housing is fixedly connected to the lower support base and the lower support base closes the lower end of the turntable shaft body, the upper end of the turntable housing is fixedly connected to the upper support base, and the lower end of the turntable shaft body is installed with a limit bearing axial Displacement circlip and grating used to improve the indexing accuracy of the rotary table.

Wherein, the tool holder carriage device includes a small carriage and a four-station turret, the four-station turret is fixed on the small carriage, and the rotary saddle includes an X-direction saddle, an X-direction rail and an X-direction rail. The X-direction guide rail is fixed on the X-direction saddle, the X-direction ball screw adopts a single support structure and is arranged on the X-direction saddle, and one end of the X-direction ball screw is connected to the X-direction shaft coupling The servo motor is softly connected, and the other end of the X-direction ball screw is screwed with the X-direction nut set in the middle of the bottom of the small carriage to form an X-axis motion pair.

Wherein, the main shaft device includes a bed head box, a hollow main shaft and a rotary oil cylinder, and the hollow main shaft is supported on the bed head box by using an angular contact bearing structure of three front and two rear, and the front end of the hollow main shaft is connected with a sleeveless chuck seat , the rear end of the hollow main shaft is fixedly connected with the rotary oil cylinder, and a tie rod is pierced in the inner hole of the hollow main shaft. The electric spindle rotor is set in the suit, and the electric spindle stator is arranged in the bedside box.

Wherein, the saddle carriage device includes a large carriage, and the side of the base on which the large carriage is installed is provided with a Z guide rail, and the guide rail surface of the large carriage cooperates with the Z guide rail, and the large carriage passes through The nut installed in the middle of its bottom end and the Z-axis ball screw installed on the base rotate and constitute the Z-axis kinematic pair.

Further, the Z-axis ball screw is supported on the base by two fixed ends, one end of the Z-axis ball screw is elastically connected to the servo motor through a coupling, and the other end of the Z-axis ball screw is connected to the bottom of the large pallet. The nut in the middle of the end is screwed together.

Further, the guide rail surface of the large pallet is bonded with the Z guide rail after pasting the plastic tape I, and the guide rail surface of the large pallet is also provided with a left pressure plate of the large pallet and a right pressure plate of the large pallet that can limit the upper and lower gaps of the large pallet. A long wedge iron is provided on the inner side of the guide rail surface of the large pallet, and a large adjustment screw is used to limit the left and right clearance of the large pallet.

Further, the guide rail surface of the small pallet is pasted with the plastic tape II and bonded to the X guide rail, and the guide rail surface of the small pallet is also provided with a small pallet left pressure plate and a small pallet right The pressing plate is provided with a short wedge iron on the inner side of the guide rail surface of the small pallet and uses small adjustment screws to limit the left and right gap of the small pallet.

Further, a turning tool is installed on the four-station turret, or a rolling tool or a finishing tool is installed at the same time.

Advantage of the present invention compared with prior art:

1. The application of the direct-drive torque motor rotary table mechanism and the four-station tool holder can complete the finishing process and extrusion process that originally needed to be carried out on different machine tools at one time on this machine tool, and the spherical machining accuracy is large. The amplitude is improved, which saves the process of grinding the spherical surface, so that the processing technology of the sphere is shortened and the efficiency is improved;

2. The main shaft adopts the electric main shaft structure, which shortens the transmission chain, saves the structure of the motor passing through the pulley and the belt, greatly reduces the transmission noise, and improves the transmission accuracy and speed;

3. The turntable adopts the most advanced direct drive technology and is equipped with YRT turntable bearings, so that the turntable has no backlash and can withstand large cutting loads, and the precision planetary gear reducer driven by the servo motor is omitted, and then the precision The structure of the turntable driven by the planetary gear reducer shortens the transmission chain and greatly improves the indexing and positioning accuracy. The improvement of dynamic rigidity is more conducive to cutting process.

Description of drawings

Fig. 1 is the exploded diagram of structure of the present invention;

Fig. 2 is a schematic diagram of the structure of the present invention after removing the oil cylinder connector and the small supporting plate;

Fig. 3 is a front view of the structure of the present invention;

Fig. 4 is a top view of the structure of the present invention;

Fig. 5 is a left view of the structure of the present invention;

Fig. 6 is a right view of the structure of the present invention;

Fig. 7 is A-A sectional view of Fig. 4;

Fig. 8 is the B-B sectional view of Fig. 4;

FIG. 9 is a sectional view along line C-C of FIG. 3 .

Detailed ways

A kind of embodiment of the present invention is described below in conjunction with accompanying drawing 1,2,3,4,5,6,7,8,9.

A high-speed precision automatic CNC machine tool for spherical cutting, with a base 7, the upper side of the base 7 is provided with a spindle device 2, and the upper part of the base 7 is located on the same side of the spindle device 2 and is installed with a linear reciprocating motion along the spindle axis of the spindle device 2 The saddle carriage device 3, the saddle carriage device 3 is provided with a direct-drive torque motor turntable device 4 and the rotation axis of the direct-drive torque motor turntable device 4 and the rotation axis of the spindle device 2 are in a space Absolute intersection, the upper end of the direct-drive torque motor turntable device 4 is connected to the rotary saddle device 5 and drives the rotary saddle device 5 to rotate and reciprocate around the axis of the direct-drive torque motor turntable device 4, and the rotary saddle The upper end of the seat device 5 is equipped with a tool rest carriage device 6 that reciprocates in a straight line perpendicular to the axis of the main shaft device 2. The linear motion of the knife carriage carriage device 6 and the rotary motion of the rotary saddle device 5 form a pair The cutting motion of the workpiece 51 causes the workpiece 51 clamped at the front end of the spindle device 2 to be cut into a true spherical shape.

The direct-drive torque motor turntable device 4 includes a turntable housing 96 and a turntable shaft body 95, the upper end of the turntable shaft body 95 is supported in the turntable housing 96 by a YRT bearing 99, and the lower end of the turntable shaft body 95 is supported by a bearing Supported by 100, the motor rotor 106 is set on the turntable shaft body 95, and the motor stator 107 is arranged in the turntable housing 96, and the upper end of the turntable shaft body 95 is fixedly connected with the rotary saddle device 5. The lower end of the turntable housing 96 is fixedly connected to the lower support base 94 and the lower support base 94 closes the lower end of the turntable shaft 95, the upper end of the turntable housing 96 is fixedly connected to the upper support base 93, and the lower end of the turntable shaft 95 is installed with The retaining spring 105 for limiting the axial displacement of the bearing 100 and the grating 98 for improving the indexing accuracy of the rotary table. Specifically, the DD motor stator 107 is installed with interference heat in the turntable housing 96. In order to improve the precision and rigidity of the turntable of the direct-drive torque motor turntable 4, the upper end support of the turntable shaft body 95 is YRT bearing 99. Turntable shaft body 95 outer diameters cooperate with YRT bearing 99 endoporuses to install, press and lock with wire ring 1102, YRT bearing 99 outer diameters cooperate with upper support seat 93, and fix with it with screw 97. The upper support base 93 is connected with the turntable housing 96 by screws 49 . The inner ring of the lip seal 101 is set on the outer circle of the upper support seat 93, and the outer diameter of the lip seal 101 is fixed to the X-direction saddle 73, which plays the role of a rotary seal. A motor rotor 106 is installed in the middle of the turntable shaft body 95 for interference heat. The inner diameter of the bearing 100 cooperates with the shaft body 95 of the turntable, the outer diameter of the bearing 100 cooperates with the lower support base 94, and the lower support base 94 is connected and fixed with the turntable housing 96 by screws 103. A circlip 105 is installed on the lower end of the turntable shaft body 95 to limit the axial displacement of the bearing 100 . In order to improve the indexing accuracy of the rotary table, a high-resolution grating 98 is thermally bonded on the shaft body 95 of the rotary table.

The tool holder carriage device 6 includes a small carriage 58 and a four-station turret 71, the four-station turret 71 is fixed on the small carriage 58, and the rotary saddle 5 includes an X-direction saddle 73, The X-direction rail 77 and the X-direction ball screw 78, the X-direction rail 77 is fixed on the X-direction saddle 73, and the X-direction ball screw 78 adopts a single support structure to be arranged on the X-direction saddle 73, and the X-direction One end of the ball screw 78 is softly connected with the servo motor 79 through an X-direction coupling 81, and the other end of the X-direction ball screw 78 is screwed with the X-direction nut 64 arranged in the middle of the bottom of the small carriage 58 to form an X-axis kinematic pair. The guide rail surface of the small pallet 58 is pasted with the plastic tape II66 and bonded to the X guide rail 77. The guide rail surface of the small pallet 58 is also provided with a small pallet left pressure plate 59 and a small pallet that can limit the upper and lower gaps of the small pallet 58. Plate right pressing plate 60 is provided with short wedge iron 62 and limits little supporting plate 58 left and right gaps with small adjusting screw 109 in the inboard of small carriage 58 guide rail surfaces. A turning tool 72 is installed on the four-station turret 71, or a rolling tool or a finishing tool is installed. Specifically, the X-direction saddle 73 cooperates with the upper end of the turntable shaft body 95 and is fixed with it by six screws 18 . The X-direction rail 77 adopts a quenched and inlaid steel guide rail. The quenched X-direction rail 77 is connected with the X-direction saddle 73 with six screws 110 on the left and right sides. The X-direction ball screw 78 adopts a single support structure, and the X-direction motor base 74 is fixedly connected to the X-direction saddle 73 with four screws 84 . The supporting part of the X-direction ball screw 78 is successively fitted with a flat pad 76 and a bearing group 82, the inner ring of the bearing group 82 is locked tightly with a thread ring II80, and the outer ring of the bearing group 82 cooperates with the X-direction motor seat 74, and at the same time Compress and lock with small pressure ring 75 and screw 83. The left end of the X-direction ball screw 78 is equipped with an X-direction coupling 81, which is softly connected with the output shaft of the servo motor 79, and the servo motor 79 is fixedly connected with the X-direction motor base 74 by screws 67 at the same time. The guide rail surface of small supporting plate 58 is pasted with plastic belt II66 and X guide rail 77 on the X to saddle 73 fits, matches and small supporting plate left pressing plate 59 and small supporting plate right pressing plate 60 limit small supporting plate 58 upper and lower gaps, Regulate short wedge iron 62 with small adjustment screw 109 and can limit the left and right gap of small supporting plate 58 simultaneously. The X-direction nut seat 61 is fixed with screws 68 in the middle of the bottom of the small supporting plate 58, and the X-direction nut 64 screwed with the X-direction ball screw 78 is fixedly fitted with the X-direction nut adjustment pad 63 and four screws 69. in its inner hole. Built-in four-station turret 71 is fixed on the small supporting plate 58 by four screws 110, and turning tool 72 is just clamped in the tool holder position of built-in four-station turret 71. Simultaneously, the built-in four-station turret 71 can also clamp finishing tools or cutters such as rolling cutters.

The main shaft device includes a bed head box 27, a hollow main shaft 28 and a rotary oil cylinder 42. The main shaft device is connected to the base 7 with six screws 57. The hollow main shaft 28 is supported on the bed with an angular contact bearing structure of three front and two rear. On the head box 27, the front end of the hollow main shaft 28 is connected with a sleeveless chuck seat 37; The piston rod of the oil cylinder 42 is connected, and the other end of the pull rod 39 is connected with the collet 38 for clamping the workpiece 51 . Specifically, the spindle device adopts a high-power built-in spindle motor, and the supporting part adopts an angular contact bearing structure with three fronts and two rears. The rigidity and high-speed performance of the spindle are fundamentally improved, and the noise of the spindle will not exceed 60dB. The electric spindle stator 44 is sleeved in the headstock 27 . The electric cable of described electric main shaft stator 44 is to pass the cable joint 43 that is connected on the head box 27 and pass to main shaft outside, so that the usefulness of connection. The front support part of the hollow main shaft 28 is sequentially fitted with the front bearing group 32, the inner gap adjusting ring 33, the outer gap adjusting ring 34 and the front spacer ring 25. The inner ring of the front bearing group 32 is locked tightly with the thread ring III41, and the outer ring of the front bearing group 32 Cooperate with the inner hole of the front sleeve 22, and use the bearing cover 29 and the screw 112 to compress and lock it. An O-ring 53 is installed in the groove of the right end face of the bearing cover 29 to be firmly attached to the end face of the front sleeve 22 to prevent external cutting fluid from entering the bearing chamber. Front sleeve 22 outer circles cooperate headstock 27 endoporuses, are connected with it with screw 49. This constitutes the front support portion. Hollow main shaft 28 intermediate positions interfere with shrink-fit electric main shaft rotor 45, and lock with key 47 simultaneously. Adjacent to the left end surface of the electric spindle rotor 45, a balance ring 24, a rear bearing group 35, a spacer ring 26, an encoder 46 and an oil cylinder connector 31 are set on the rear support part of the hollow main shaft 28 in sequence. The inner ring of the rear bearing group 35 is compressed and locked with the wire ring IV40, the outer ring of the rear bearing group 35 is in clearance fit with the inner hole of the rear sleeve 23, the outer circle of the rear sleeve 23 is matched with the inner hole of the bedside box 27, and the screw 50 Connect with it. An encoder 46 is fixedly mounted on the left end surface of the rear sleeve 23 with a screw 54 . The cylinder connector 31 is locked by the key 48, and the supporting part is formed so far. The clamping system of the main shaft mainly depends on the tensioning and loosening of the piston of the Zhongshi rotary oil cylinder 42 to realize. The transition disc 36 is connected to the solid rotary cylinder 42 through screws 56 , and the cylinder connector 31 connects the transition disc 36 to the solid rotary cylinder 42 through screws 55 . The front end of the hollow main shaft 28 is connected with the sleeveless chuck seat 37 with the screw 52, and the driving pin 30 and the screw 20 are turned to transmit power simultaneously. Hollow main shaft 28 endoporus is worn with pull rod 39, and pull rod 39 left ends are connected with the piston rod of solid rotary oil cylinder 42, and right end is connected with collet 38, and collet 38 clamps workpiece 51.

The saddle carriage device 3 includes a large carriage 85, the side of which the large carriage 85 is installed on the base 7 is provided with a Z guide rail 108, and the guide rail surface of the large carriage 85 cooperates with the Z guide rail 108, so The large carriage 85 forms a Z-axis kinematic pair by rotating the nut 90 installed in the middle of its bottom end and the Z-axis ball screw 13 installed on the base 7 . The Z-axis ball screw 13 is supported on the base 7 by two fixed ends, one end of the Z-axis ball screw 13 is elastically connected to the servo motor 14 through a coupling 15, and the other end of the Z-axis ball screw 13 is installed on the large The nut 90 in the middle of the bottom end of the carriage 85 is screwed together. The guide rail surface of the large pallet 85 is bonded with the Z guide rail 108 after pasting the plastic tape I92, and the guide rail surface of the large pallet 85 is also provided with a large pallet left pressure plate 87 and a large pallet right plate that can limit the upper and lower gaps of the large pallet 85. Pressing plate 86 is provided with long wedge iron 91 and limits big dragging plate 85 left and right gaps with large adjusting screw 65 in the inboard of big dragging plate 85 guide rail surfaces. The left end support surface of the Z-axis ball screw 13 is sequentially set with: two rows of screw support bearings 17, a fixed end backing ring 10, the inner ring of the support bearing 17 is compressed and locked with a nut 16, one end of the outer ring of the support bearing 17 and Z Cooperate with the inner hole of the motor support 8, the Z-direction motor support 8 is fixed on the base 7 with four screws 21, and the other end of the outer ring of the supporting bearing 17 is pressed and locked with a pressure ring 11 and four screws 113 . The right end support surface of the Z-axis ball screw 13 is sequentially set with: shoulder pad ring 114, two rows of screw support bearings 17, right end pad ring 115, the inner ring of the support bearing 17 is compressed and locked with a nut 16, and the support bearing 17 Outer ring and Z direction bearing seat 9 endoporus cooperate with right pressing ring 116 and four screws 117 to compress and lock. In order to prevent iron from cutting into the right-hand bearing, a dust-proof ring 119 is fixed with a screw 118 on the left end surface of the Z-direction bearing seat 9 . The Z-direction bearing seat 9 is fixed on the base 7 with four screws 19 . The Z-direction nut 90 screwed with the Z-axis ball screw 13 is installed and fixed on the large carriage 85 with screws 50 through the Z-direction nut seat 88 and the Z-direction nut adjustment pad 89 . The left end of the Z-axis ball screw 13 is sleeved with a coupling 15 and elastically connected to the servo motor 14 , and the servo motor is fixed on the Z-direction motor support 8 with screws 18 . The Z-direction nut 90 screwed with the Z-direction ball screw 13 is fitted in the inner hole of the Z-direction nut seat 88 and fixed by the screw 1 .

Transmission processing principle: the hollow spindle 28 is powered by the electric spindle stator 44 to drive the spindle shaft body to rotate, and the collet 38 and the sleeveless chuck seat 37 holding the workpiece 51 are fixedly connected to the spindle, so they also rotate at high speed with the spindle. The clamping system of the hollow main shaft 28 mainly relies on the tightening and loosening of the piston rod of the solid rotary oil cylinder 42 to realize. When the piston of Zhongshi rotary oil cylinder 42 moves back and forth, it drives the pull rod 39 connected to it to also move back and forth. Since the right end of the pull rod 39 is connected to the collet 38, the collet 38 can also move back and forth, but because there is no collet seat 37 limits the movement of the collet 38, and the inner hole of the collet 38 shrinks inwardly to clamp the workpiece 51. During actual machining, the Z-direction motion does not participate in the actual cutting motion. Its function is mainly to adjust the Z-direction motion of the direct-drive torque motor turntable 4 to ensure the rotation center of the horizontal projection of the workpiece 51 and the rotation of the direct-drive torque motor. The center of rotation of platform 4 coincides. The drive of the Z-direction movement is driven by the servo motor 14, and the output shaft is provided with a Z-direction coupling 15 and a Z-axis ball screw 13 for soft connection, and the Z-direction nut 90 is fixed to the large carriage 85 through the Z-direction nut adjustment pad 89 , and with the Z-axis ball screw 13, when the servo motor 14 rotates, the large carriage 85 can be dragged to move forward and backward in the Z direction. The motion of the direct-drive torque motor turntable 4 is relatively simple, and it uses a direct-drive torque motor with a large pitch as the power source for rotation. Because in cutting, the direct-drive torque motor turntable 4 is the unit that actually participates in cutting, All the cutting resistance will be borne by the direct drive torque motor rotary table 4, so the machine tool selects the direct drive torque motor rotary table 4 with a torque of up to 150N.M and the YRT bearing 99 to bear the cutting force. The forward and backward movement in the X direction mainly plays the role of adjusting the diameter of the straight ball of the workpiece 51 during cutting. In order to be able to bear the cutting force and feed accurately, a double-lead micro-pitch ball screw 78 is selected, which can effectively ensure smooth cutting, and the forward and backward movement in the X direction is mainly driven by the servo motor 79. The output shaft is provided with an X-direction coupling 81 and a soft connection with the X-axis ball screw 78, and the X-direction nut 61 is fixed with the small carriage 58 through the X-direction nut adjustment pad 63 and rotated with the X-axis ball screw 78. When the servo motor 79 rotates, the X-axis ball screw 78 is driven, and the X-direction nut 64 that rotates with it is fixed, so the small carriage 58 is dragged to move back and forth, because the small carriage 58 is fixed with a built-in Four-station turret 71, so the turning tool 72 clamped on the built-in four-station turret 71 also moves accordingly, realizing the effect of adjusting the straight ball diameter of the workpiece.

The foregoing embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, so all equivalent changes made with the contents of the claims of the present invention should be included within the scope of the claims of the present invention .

Claims (10)

1. the high speed and precision automation Digit Control Machine Tool that is used for the sphere cutting; Has base (7); It is characterized in that: said base (7) top one side is provided with main shaft device (2); Base (7) top is positioned at main shaft device (2) the same side the saddle carriage device (3) of doing straight reciprocating motion along the main-shaft axis of main shaft device (2) is installed; It is definitely crossing in the space that said saddle carriage device (3) is provided with the axis of rotation of axis of rotation and main shaft device (2) of direct-driving type torque motor turret device (4) and direct-driving type torque motor turret device (4); Said direct-driving type torque motor turret device (4) upper end is connected with revolution saddle device (5) and drives revolution saddle device (5) and rotates reciprocating motion around the axis work of direct-driving type torque motor turret device (4); Said revolution saddle device (5) upper end is equipped with the edge tool rest carriage device of doing straight reciprocating motion (6) vertical with the main-shaft axis of main shaft device (2), and the gyration of the rectilinear motion of said tool rest carriage device (6) and revolution saddle device (5) constitutes cutting movement to workpiece (51) to be cut the workpiece (51) that is clamped in main shaft device (2) front end to be positive sphere.

2. the high speed and precision automation Digit Control Machine Tool that is used for the sphere cutting according to claim 1; It is characterized in that: said direct-driving type torque motor turret device comprises panoramic table housing (96) and turntable axis body (95); Said turntable axis body (95) upper end is supported in the panoramic table housing (96) with YRT bearing (99); Turntable axis body (95) lower end is supported with bearing (100); Turntable axis body (95) is gone up suit rotor (106), and motor stator (107) is arranged in the panoramic table housing (96), and said turntable axis body (95) upper end is fixedly connected with revolution saddle device (5).

3. the high speed and precision automation Digit Control Machine Tool that is used for the sphere cutting according to claim 2; It is characterized in that: supporting seat (94) and following supporting seat (94) were with turntable axis body (95) lower end closed under said panoramic table housing (96) lower end was fixedly connected; Panoramic table housing (96) upper end is fixedly connected with last supporting seat (93), and said turntable axis body (95) lower end is equipped with the jump ring (105) of restriction bearing (100) axial displacement and is used to improve the grating (98) of rotary table indexing accuracy.

4. according to claim 1 or the 2 or 3 described high speed and precision automation Digit Control Machine Tools that are used for the sphere cutting; It is characterized in that: said tool rest carriage device (6) comprises upper slide rest (58) and four station cutter towers (71); Said four station cutter towers (71) are fixed on the upper slide rest (58); Said revolution saddle device (5) comprise X to saddle (73), X to guide rail (77) and X to ball-screw (78); Said X is fixed on X on saddle (73) to guide rail (77); Said X adopts single supporting construction to be arranged on X on saddle (73) to ball-screw (78), and X is flexible coupling to shaft coupling (81) and servomotor (79) through X to ball-screw (78) one ends, and X screws to nut (64) to ball-screw (78) other end X middle with being arranged on upper slide rest (58) bottom and constitutes X axle kinematic pair.

5. according to claim 1 or the 2 or 3 described high speed and precision automation Digit Control Machine Tools that are used for the sphere cutting; It is characterized in that: said main shaft device comprises headstock (27), hollow spindle (28) and angling cylinder (42); Said hollow spindle (28) adopts the angular contact bearing structure support of first three back two on headstock (27); Said hollow spindle (28) front end connects and has or not cartridge clip headstock (37), and hollow spindle (28) rear end is fixedly connected with angling cylinder (42), is installed with pull bar (39) in hollow spindle (28) endoporus; Said pull bar (39) one ends are connected with the piston rod of angling cylinder (42); Pull bar (39) other end is connected with the collet (38) of clamping workpiece (51), is set with electric spindle rotor (45) on the said hollow spindle (28), and electric main shaft stator (44) is arranged in the headstock (27).

6. according to claim 1 or the 2 or 3 described high speed and precision automation Digit Control Machine Tools that are used for the sphere cutting; It is characterized in that: said saddle carriage device (3) comprises saddle (85); Said base (7) is gone up the side that saddle (85) is installed and is provided with Z to guide rail (108); Said saddle (85) guide pass and Z cooperate to guide rail (108), and said saddle (85) revolves and constitutes Z axle kinematic pair through being installed in the nut (90) in the middle of its bottom and being installed in Z shaft ball screw (13) on the base (7).

7. the high speed and precision automation Digit Control Machine Tool that is used for the sphere cutting according to claim 6; It is characterized in that: said Z shaft ball screw (13) adopts the two ends fixed form to be supported on the base (7); Z shaft ball screw (13) one ends are connected with servomotor (14) elasticity through shaft coupling (15), and Z shaft ball screw (13) other end nut (90) middle with being installed in saddle (85) bottom screws.

8. the high speed and precision automation Digit Control Machine Tool that is used for the sphere cutting according to claim 7; It is characterized in that: said saddle (85) guide pass is fitted to guide rail (108) with Z after pasting and moulding band I (92); Saddle (85) guide pass also is provided with and can limits saddle (85) the saddle left pressing plate (87) and the right pressing plate (86) of saddle in gap up and down, is provided with long drift (91) in the inboard of saddle (85) guide pass and uses big adjustment screw (65) restriction saddle (85) gap, the left and right sides.

9. the high speed and precision automation Digit Control Machine Tool that is used for the sphere cutting according to claim 4; It is characterized in that: said upper slide rest (58) guide pass is fitted to guide rail (77) with X after pasting and moulding band II (66); Said upper slide rest (58) guide pass also is provided with and can limits upper slide rest (58) the upper slide rest left pressing plate (59) and the right pressing plate (60) of upper slide rest in gap up and down, is provided with short drift (62) in the inboard of upper slide rest (58) guide pass and limits little supporting plate (58) gap, the left and right sides with the whole screw (109) of ditty.

10. the high speed and precision automation Digit Control Machine Tool that is used for the sphere cutting according to claim 4 is characterized in that: said four station cutter towers (71) are gone up lathe tool (72) are installed, and rolling tool or polishing cutter perhaps are installed simultaneously.

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