TWI680818B - Deep hole ball thread hard turning method and lathe equipment using the same - Google Patents

Abstract

The invention provides a deep-hole ball thread hard turning method and lathe equipment using the same, which are used for cutting and processing ball threads on the inner hole wall of a ball nut, which mainly includes: a processing machine base; The chuck mechanism (C-axis and Y-axis) on the machine base applies the chuck mechanism to clamp and position the outer diameter of a ball nut, and drives the ball nut to rotate while moving linearly toward the Y axis; and A tool feed mechanism (X axis), the tool feed mechanism has a moving seat, two ends of the moving seat are provided with a tool bar fixing seat, a tool bar that passes through the inner hole of the ball nut and does not rotate, the tool bar The two ends of the shaft are fixed by the holder of the cutter bar at each end, and a cutting blade combined with the cutter bar; by this, the ball nut is made in the C axis and the Y axis through the processing machine base and the chuck mechanism The rotary feed, and the cutting blade is fed in the X axis by moving the seat, and the two ends of the arbor are fixed, which can achieve the purpose of deep hole processing and prevent the vibration of the knife.

Description

Deep hole ball thread hard turning method and lathe equipment using the same

The invention relates to a processing method and a processing machine, in particular to a hard turning method dedicated to cutting and processing a screw groove in an inner hole of a high-lead ball nut and a lathe device using the same.

In order to improve the efficiency of industrial processing and production, the mobile pedestals of many CNC machine tools today are mostly driven by linear motors that can move at high speeds. However, in addition to the high price of this linear motor, its precision control needs to be accompanied by a digital encoder sensor (optical ruler, magnetic ruler) that can be precisely positioned. Therefore, the use of a linear motor with a digital encoder sensor is not The best high-speed mobile solution. The driving of the traditional CNC machine tool mobile pedestal is mostly controlled by the ball nut and screw to control the drive and precise positioning. However, when the lead of the ball nut and the screw are less than 2 times or even 3 times, the effect of high-speed movement is not easy to achieve. Therefore, the 2 times and 3 times high lead ball nuts and screws are the key to the development of high-speed CNC machine tools.

The ball nut and screw are used as rolling media through recirculating balls. In order to make the ball nut run on the screw more precise and smooth, the thread bead groove in the ball nut contacting the ball will be heat-treated and hardened. The grinding process improves the dimensional accuracy and geometric accuracy of the threaded bead groove. As shown in the schematic diagram of the grinding process shown in FIG. 3, when the low-lead ball nut 200 is ground, the grinding wheel 100 can also penetrate the ball nut 200. However, when the specifications of the ball nut are pulled to the high lead specification of 2 times and 3 times, the grinding process of the thread bead groove can not be achieved by traditional grinding equipment, such as the grinding wheel 100 disclosed in FIG. 4 because the wheel shaft and One end of the ball nut 200 interferes, so the lead angle of the thread bead groove cannot be penetrated into the inner hole 201 of the ball nut 200 for grinding.

In addition, some manufacturers use hard cutting to replace the grinding process, so that the ball nut machining parts are first roughened and heat-treated and hardened, and the CBN (boron nitride) turning tool is used to precisely turn the thread bead groove. The processing method is shown in FIGS. 3 and 4. One end of the ball nut 10 is clamped to the chuck 20 of the turning machine. In addition, the tool holder 30 is fixed with a handle 40, and the front end of the handle 40 has a CBN (boron nitride) The blade 50; by this, the movement of the tool holder 30 is controlled, and the CBN (boron nitride) blade 50 at the front end of the tool holder 40 is extended into the inner hole 101 of the ball nut 10 to perform the cutting processing of the thread bead groove.

However, whether it is a traditional turning machine or CNC turning machine, only the rear end of the tool holder 40 is fixed to the tool holder, and the front end of the tool holder 40 (including the blade 50) is in a suspended state. If you want to process a longer ball nut, The length of the handle 40 is longer, so the fixed point of the handle 40 to the resistance point of the blade 50 is too long, and the vibration of the handle 40 is easily generated during cutting, resulting in poor cutting surface accuracy, shortened tool life, and enlarged dimensional errors.

In addition, the above two methods of machining operations such as turning and drilling are carried out by CNC. Therefore, after the nut material is installed on the processing machine, it must take a long time to calibrate, otherwise there will be accuracy problems. It also increases the difficulty of the job and the completion time. Therefore, the processing method of traditional nut materials has the problems of high production cost, long processing time, poor accuracy, or a lot of calibration time. Many defects of the above-mentioned conventional techniques should be eliminated.

The purpose of the present invention is to provide a deep-hole ball thread hard turning method and lathe equipment using the same. Through the design of the processing machine base, chuck mechanism and tool feed mechanism, the deep-hole ball nut is clamped When the chuck mechanism rotates, the tool bar of the tool feed mechanism passes through the inner hole of the ball nut, and the two ends of the tool bar are fixed in a non-rotating state, so that the cutting blade on the tool bar is opposed to the rotating ball nut The inner wall of the inner hole is cut to cut the ball groove, which is suitable for deep hole machining, improve the precision of the ball groove, optimize the cutting surface of the ball groove, extend the service life of the shank and cutting insert, etc. purpose.

In order to achieve the above purpose, the deep-hole ball thread hard turning method of the present invention is used to machine a ball groove in the inner hole of a ball nut. The hard turning method includes: one performing Y axial feed and C-axis rotating chuck mechanism, which makes the chuck mechanism hold the outer diameter of the ball nut, and drives the ball nut C to rotate axially while moving and feeding in the Y axis; a tool feeding mechanism, The cutter feeding mechanism has a cutter bar that passes through the inner hole of the ball nut and does not rotate. The two ends of the cutter bar are respectively fixed to a cutter bar fixing seat, and the cutter bar is combined with a cutting blade; and the chuck The mechanism drives the ball nut to rotate in the C axis and move in the Y axis to feed, and the tool bar is fixed without rotating and only the X axis feeds, so that the cutting blade on the tool bar processes the inner hole of the ball nut Out of the ball screw groove.

In order to achieve the above object, the lathe equipment of the deep-hole ball thread hard turning method of the present invention is used to cut and process a ball screw groove on the inner hole wall of a ball nut, which includes: a processing machine base; Chuck mechanism for Y axis feed and C axis rotation, the chuck mechanism has a workpiece fixing seat provided on the base of the processing machine, and a workpiece fixing seat provided on the workpiece fixing seat for fixing the ball screw A cap and a rotating unit for driving the ball nut to rotate, and a rotary driving unit provided on the workpiece fixing seat for driving the rotating unit to rotate; and a tool feeding mechanism for the X axis and the tool feeding mechanism There is a cutter bar for passing through the inner hole of the ball nut and not rotating, the cutter bar is a long bar body, and a wall of the inner hole hole combined with the cutter bar for cutting the ball nut A cutting blade forming the ball screw groove, a cutter bar fixing seat provided on the processing machine base for fixing the two ends of the cutter bar and for driving the cutter bar to move and feed, and a cutter bar for driving the cutter The rod fixing seat moves and feeds the second linear drive unit.

In the above lathe equipment of the deep hole ball thread hard turning method, the rotating unit is a rotating clamping unit for clamping the outer diameter of the ball nut.

In the lathe equipment of the deep hole ball thread hard turning method described above, the chuck mechanism includes a transmission unit for being driven by the rotary driving unit and for driving the rotating unit.

In the lathe device of the deep hole ball thread hard turning method described above, the transmission unit includes a driving wheel for being driven to rotate by the rotary driving unit, and a driving wheel for being driven by the driving wheel for rotating and driving the rotating unit Passive wheel.

In the above lathe equipment of the deep hole ball thread hard turning method, the rotating clamping unit is one of a tapered clamping sleeve or a multi-jaw chuck.

In the above lathe equipment of the deep hole ball thread hard turning method, the chuck mechanism includes a first linear drive unit for driving the workpiece fixing seat to move and feed.

In the above lathe equipment of the deep hole ball thread hard turning method, the first linear drive unit drives the workpiece holder to move in a Y axis direction, and the second linear drive unit drives the tool holder to move in an X axis direction When the coating moves, the Y axis and the X axis are perpendicular to each other.

In the above lathe device of the deep hole ball thread hard turning method, the tool bar fixing seat of the tool feeding mechanism includes a tool bar fixing seat body, and a tool bar fixing seat body is arranged on the tool bar fixing seat body and fixes the tool bar first The first support at the end, and a second support provided on the body of the holder and fixed at the second end of the holder.

In the above lathe equipment of the deep hole ball thread hard turning method, the second support includes a sliding seat provided on the body of the holder for moving, and a sliding seat provided on the sliding seat for A cutter bar clamp connected or separated at the second end of the cutter bar.

In order to achieve the above object, the lathe device of the deep-hole ball thread hard turning method of the present invention is used for cutting and machining a ball groove on the inner hole wall of a ball nut. The preferred technical solution includes: a machining Machine base; a chuck mechanism provided on the base of the processing machine, the chuck mechanism clamps the outer diameter of the ball nut, and drives the ball nut to rotate while moving toward the Y axis feed; and a A tool feed mechanism that moves and feeds in the Y-axis direction. The tool feed mechanism has a cutter bar that passes through the inner hole of the ball nut and does not rotate, and a cutting blade combined with the cutter bar , A cutter bar fixing seat which is arranged on the base of the processing machine and fixes the two ends of the cutter bar and drives the cutter bar to move and feed.

The deep-hole ball thread hard turning method of the present invention and the lathe equipment using the same can achieve the following effects:

(1) The two ends of the arbor are fixed by the arbor fixing seat, and the arbor and the blade become non-rotating members, and the ball nut becomes a rotating state, so that the two ends of the arbor can be stabilized To reduce the vibration generated during the cutting of the blade, improve the problems of poor cutting surface accuracy, shortened tool life and dimensional error in conventional cutting technology.

(2) The rotating clamping unit is formed by using a conical clamping sleeve or a multi-jaw chuck to realize a mechanism for clamping the rotation of the ball nut.

(3) The driving wheel of the transmission unit directly drives the passive wheel, so that the passive wheel drives the rotating clamping unit again, which can meet the load during heavy cutting.

(4) Through the sliding seat of the second support and the cutter bar clamp, the cutter bar clamp can not only clamp one end of the cutter bar, but also can be separated from one end of the cutter bar, so that it can be loaded into the to-be-cut Attach the ball nut to the rotating unit, or remove the ball nut after the cutting process from the rotating unit.

The structural features of the present invention and other functions and objectives are described in detail as follows according to the embodiments of the drawings:

Referring to FIGS. 5, 6 and 7, the deep-hole ball thread hard turning method of the present invention and the lathe equipment using the same are used for cutting a hole wall of an inner hole 101 of a ball nut 10 The hard turning method of the ball screw groove 102 and the special processing lathe equipment include preferred main embodiments: a processing machine base 1, a chuck mechanism 2, and a tool feed mechanism 3, three main mechanisms, among which: The processing machine base 1 is preferably implemented as a base made of casting or steel plate welding, and a platform 11 for mounting rails and other mechanisms is implemented on the top surface of the processing machine. The platform 11 is preferably in a horizontal state. Implemented in a tilted state, it is used to install the chuck mechanism 2, the tool feed mechanism 3 and other electrical equipment on the platform 11.

The chuck mechanism 2 is a mechanism for fixing the ball nut 10 and driving the ball nut 10 to perform Y-axis feed and C-axis rotation. The preferred implementation of the ball nut 10 is provided on the processing machine base 1 The workpiece fixing seat 21 on the platform 11 is a rectangular stand with an installation space inside; a rotating unit 22 provided on the workpiece fixing seat 21 for clamping the ball nut 10, the The rotating unit 22 is used to drive the ball nut 10 to rotate and feed; and a rotating driving unit 23 provided in the workpiece fixing seat 21 for driving the rotating unit 22 to rotate, the rotating driving unit 23 converts electrical energy into mechanical energy In this way, during the cutting process, the rotation drive unit 23 drives the rotation unit 22 and the ball nut 10 to rotate.

The tool feed mechanism 3 is used to extend into the inner hole 101 of the ball nut 10, and the X-axis feed mechanism for cutting out the ball groove 102 in the hole wall of the inner hole 101. The arbor 31 for passing through the inner hole 101 of the ball nut 10 and not rotating during the cutting process, the arbor 31 may be specifically implemented as a long rod body with a circular cross-section or other shapes ; A cutting blade 32 combined with the cutter bar 31 for cutting the inner wall 101 of the ball nut 10 to form the ball groove 102, the cutting blade 32 is an existing product; one is provided in the processing machine The base 1 is used to fix the two ends of the tool bar 31 of the tool bar fixing seat 33, the tool bar fixing seat 33 is used to drive the tool bar 31 and the cutting blade 32 to move and feed; and one is used to drive the knife The rod fixing seat 33 moves to feed the second linear drive unit 34 of the tool.

The deep hole ball thread hard turning method of the present invention and the lathe equipment applying the same can basically feed the cutter bar 31 and the cutting blade 32 only by driving the cutter bar fixing seat 33 through the second linear drive unit 34, A ball screw groove 102 is cut in the hole wall of the inner hole 101 of the ball nut 10. However, in order to flexibly apply the ball nut 10 of various sizes for processing, as shown in FIG. 6, the above-mentioned chuck mechanism 2 preferably implements a first linear drive unit 24 for driving the workpiece fixing seat 21 to move and feed the workpiece Through the arrangement of the first linear drive unit 24 and the second linear drive unit 34, the first linear drive unit 24 can drive the workpiece fixing seat 21 to reciprocate in a horizontal Y-axis direction to achieve workpiece rotation feed and linear Feed function. The above-mentioned second linear driving unit 34 drives the arbor holder 33 to move back and forth in a horizontal X axis, the Y axis and the X axis are perpendicular to each other, and can be fed to the workpiece The tool feed is performed in cooperation, so that the ball screw groove 102 inside the ball nut 10 can be cut and processed.

The principle of the hard turning method of the present invention is to make the chuck mechanism 2 hold the outer diameter of the ball nut 10, and drive the ball nut 10 to rotate in the C-axis while moving toward the Y-axis to feed; The cutter feed mechanism 3 has a cutter bar 31 that passes through the inner hole of the ball nut 10 and does not rotate, so that the two ends of the cutter bar 31 are fixed to the cutter bar fixing seat 33 respectively, and the cutter bar 31 is combined with cutting Blade 32; thereby, the chuck mechanism 2 can drive the ball nut 10 to rotate in the C-axis and Y-axis to move the feed, and the cutter bar 31 is fixed without rotation and only the X-axis feed (such as (Shown in FIGS. 12 and 13), the cutting insert 32 on the arbor 31 is processed into a ball screw groove on the inner hole of the ball nut 10, and the two ends of the arbor 31 are fixed to the arbor fixing seat 33, so It can suppress the vibration problem during cutting, and achieve the effects of improving the processing precision of the ball screw groove, optimizing the cutting surface of the ball screw groove, and prolonging the service life of the arbor and cutting insert.

Referring again to FIG. 6, the first linear drive unit 24 and the second linear drive unit 34 are preferably implemented with two ball slide rails 241 and 341 respectively, so that the two ball slide rails 241 and 341 are fixed on the On the platform 11 of the processing machine base 1; a plurality of ball sliders 242, 342 movably arranged on each of the ball slide rails 241, 341, so that the ball sliders 242, 342 can follow the above Y axis and X axis Sliding straight; and a ball lead screw module 243, 343 disposed between the two ball slide rails 241, 341, the ball lead screw module 243, 343 includes a motor, a ball lead screw and a ball nut ; By this, the workpiece holder 21 is installed on the ball slider 242 and the ball lead screw module 243, the workpiece holder 21 can be driven to reciprocate in the Y axis to feed; and the cutter bar The fixing seat 33 is installed on the ball slider 342 and another group of the ball lead screw module 343, and can drive the cutter bar fixing seat 33 to reciprocate and feed in the X axis direction.

Referring to FIGS. 8, 9 and 10, the rotating unit 22 of the chuck mechanism 2 may be specifically implemented as a rotating clamping unit 221 for clamping the outer diameter of the ball nut 10, the rotating clamp The holding unit 221 may be one of a tapered clamping sleeve or a multi-jaw chuck, which is used to clamp the outer diameter of the ball nut 10 to rotate and feed the workpiece. The rotation drive unit 23 of the chuck mechanism 2 may be a DC motor, which causes the motor shaft to directly drive the rotation unit 22. The preferred embodiment implements a mechanism for being driven by the rotation drive unit 23 and for driving the rotation. The transmission unit 25 of the unit, the transmission unit 25 preferably includes a driving wheel 251 for being driven to rotate by the rotary driving unit 23, and a driven wheel for being driven by the driving wheel 251 for rotating and being used for driving the rotating unit 22 The moving wheel 252, the driving wheel 251 and the passive wheel 252 are preferably gears meshing with each other. Among them, the axis of the driven wheel 252 is provided with A tapered hole 253, by which a rotating clamping unit 331 composed of a tapered clamping sleeve can be mounted to the tapered hole 253, and the mechanism at the other end of the driven wheel 252 is used to pull the tapered clamping sleeve into the The tapered hole 253 is used to clamp the outer diameter of the ball nut 10 with the tapered clamping sleeve, and then drives the ball nut 10 to rotate and feed through the driven wheel 252.

Referring to FIGS. 5 and 11 again, the tool bar fixing base 33 of the tool feed mechanism 3 of the present invention is used to support the mechanism at both ends of the tool bar 31 to prevent the tool bar 31 from vibrating while cutting. Preferably, there is a shank holder body 331, a first support 332 disposed on the shank holder body 331 and fixing the first end of the shank 31, and a first holder 332 provided on the shank holder base The second support 333 on the second end of the arbor 31 is fixed on the 331, whereby the two ends of the arbor 31 can be fixed, and the effect of preventing the arbor 31 from shaking when cutting is achieved. In order to enable the cutter bar 31 to pass through the inner hole 101 of the ball nut 10 quickly and conveniently, the ball nut 10 can be clamped on the rotation clamping unit 221, and the knife can also be recovered quickly The structure where the two ends of the rod 31 are fixed. In the present invention, the second support 333 is selected to implement a slide 3331 provided on the body of the holder 331 for movement, and a slide 3331 provided on the slide 3331 for The second end of the cutter bar 31 is connected to or separated from the cutter bar clamp 3332. The cutter bar clamp 3332 may be an existing multi-jaw chuck; thereby, as shown in FIG. 7, when the cutter bar clamp 3332 releases the knife When the second end of the rod 31 moves backward, the second end of the shank 31 can be passed through the inner hole 101 of the ball nut 10, so that the ball nut 10 is clamped in the rotation clamping unit 221, and then clamp the second end of the arbor 31 through the arbor holder 3332.

The deep-hole ball thread hard turning method of the present invention and the lathe equipment applying the same can fix the two ends of the cutter bar 31 through the cutter bar fixing seat 33, so that the cutter bar 31 and the cutting blade 32 become non-rotating members. The ball nut 10 is in the state of rotating feed, so that the two ends of the arbor 31 can be stabilized, and the cutting blade 32 can be reduced during the cutting process. The vibration of the machine improves the problems of poor cutting surface accuracy, shortened tool life and dimensional error in conventional cutting technology. The above-mentioned tapered clamping sleeve or multi-jaw chuck is used to form the rotating clamping unit 221, which can realize the effect of clamping the ball nut 10 to rotate and feed. Furthermore, the slider 3331 and the arbor holder 3332 of the second support 333 of the arbor holder 33 can make the arbor holder 3332 not only clamp one end of the arbor 31, but also engage the arbor One end of 31 is separated, so that the ball nut 10 to be cut can be inserted into the rotating unit 22, and the ball nut 10 after cutting can also be separated from the rotating unit 22 and removed.

In summary, the deep-hole ball thread hard turning method of the present invention and the lathe equipment using the same have indeed been practical and creative. The use of its technical means is also undoubtedly novel, and the efficacy and design purposes are in line with each other. It has been called reasonable progress to the point. Therefore, an application for a patent for invention was filed in accordance with the law, but I urged Jun Bureau to benefit from the detailed examination and granted the patent as a prayer.

10‧‧‧ball nut

101‧‧‧Inner hole

102‧‧‧ball groove

1‧‧‧ processing machine base

11‧‧‧Platform

2‧‧‧Chuck mechanism

21‧‧‧Workpiece fixing seat

22‧‧‧Rotating unit

221‧‧‧Rotating clamping unit

23‧‧‧rotation drive unit

24‧‧‧First linear drive unit

241‧‧‧ball slide

242‧‧‧Ball slider

243‧‧‧Ball screw module

25‧‧‧ drive unit

251‧‧‧Drive wheel

252‧‧‧Passive wheel

253‧‧‧Cone hole

3‧‧‧Tool feed mechanism

31‧‧‧Arbor

32‧‧‧Cutting insert

33‧‧‧Arbor holder

331‧‧‧Arbor holder body

332‧‧‧First support

333‧‧‧Second support

3331‧‧‧slide

3332‧‧‧Arbor fixture

34‧‧‧Second linear drive unit

341‧‧‧ball slide

342‧‧‧Ball slider

343‧‧‧Ball screw module

FIG. 1 is a schematic diagram of a conventional grinding process of a ball screw groove of a low-lead ball nut. FIG. 2 is a schematic diagram of the interference state of the ball groove of the conventional grinding high-ball nut. FIG. 3 is a schematic diagram of a device for processing a ball screw groove of a ball nut by a conventional lathe processing machine. FIG. 4 is a schematic diagram illustrating the operation of a conventional screw processing machine for processing a ball screw groove of a ball nut. 5 is a schematic perspective view of a preferred embodiment of the lathe equipment of the hard turning method of the present invention. 6 is a partially exploded schematic view of a preferred embodiment of a lathe device of the hard turning method of the present invention. 7 is a front exploded schematic view of a preferred embodiment of the chuck mechanism and tool feed mechanism of the present invention. 8 is a schematic exploded view of the preferred embodiment of the chuck mechanism and tool feed mechanism of the present invention. 9 is an exploded schematic view of some components of the preferred embodiment of the chuck mechanism of the present invention. 10 is a schematic cross-sectional front view of a preferred embodiment of the lathe equipment of the hard turning method of the present invention. 11 is a schematic cross-sectional front view of a preferred embodiment of the second support of the present invention. FIG. 12 is a schematic diagram of the tool bar and the blade of the present invention extending into the ball nut for preliminary processing. FIG. 13 is a schematic diagram of the cutter bar and the blade of the present invention extending into the ball nut to process the ball screw groove.

1‧‧‧ processing machine base

11‧‧‧Platform

2‧‧‧Chuck mechanism

21‧‧‧Workpiece fixing seat

23‧‧‧rotation drive unit

3‧‧‧Tool feed mechanism

31‧‧‧Arbor

33‧‧‧Arbor holder

331‧‧‧Arbor holder body

332‧‧‧First support

333‧‧‧Second support

3331‧‧‧slide

3332‧‧‧Arbor fixture

34‧‧‧Second linear drive unit

341‧‧‧ball slide

342‧‧‧Ball slider

343‧‧‧Ball screw module

Claims (10)

A deep-hole ball thread hard turning method for machining a ball screw groove in an inner hole of a ball nut, which includes: a chuck mechanism for Y axial feed and C axial rotation to make the clamp The head mechanism clamps the outer diameter of the ball nut, and drives the ball nut C to rotate axially while moving to feed in the Y axis; a tool feed mechanism, the tool feed mechanism has a ball screw through the ball nut The inner hole of the cap does not rotate the arbor, the two ends of the arbor are respectively fixed to a arbor fixing seat, and the arbor is combined with a cutting blade; and the chuck mechanism drives the ball nut to rotate in the C axis and The Y axis moves and feeds, and the arbor is fixed and does not rotate, only the X axis is fed, so that the cutting blade on the arbor processes the ball groove of the inner hole of the ball nut. A lathe device for deep-hole ball thread hard turning processing method, which is used to cut and process a ball screw groove on the inner hole wall of a ball nut, which includes: a processing machine base; one to perform Y axial feed and C-axis rotating chuck mechanism, the chuck mechanism has a workpiece fixing seat provided on the base of the processing machine, and a workpiece fixing seat provided on the workpiece fixing seat for fixing the ball nut and for driving the ball screw A rotation unit for rotating the cap, and a rotation driving unit provided on the workpiece fixing seat for driving the rotation of the rotation unit; and an X-axis tool feed mechanism, the tool feed mechanism having a tool for passing through the The inner hole of the ball nut and the non-rotating arbor, the arbor is an elongated bar body, and a wall that is combined with the arbor for cutting the inner hole hole wall of the ball nut to form the ball groove A blade, a cutter bar fixing seat provided on the processing machine base for fixing the two ends of the cutter bar and used for driving the cutter bar to move and feed, and a cutter bar for driving the cutter bar fixed seat to move and feed The second linear drive unit. The lathe device of the deep hole ball thread hard turning method as described in claim 2, wherein the rotating unit is a rotating clamping unit for clamping the outer diameter of the ball nut. The lathe device of the deep-hole ball thread hard turning method according to claim 3, wherein the rotary clamping unit is one of a tapered clamping sleeve or a multi-jaw chuck. The lathe device of the deep hole ball thread hard turning method as described in claim 2, wherein the chuck mechanism includes a transmission unit for being driven by the rotary driving unit and for driving the rotating unit. The lathe device of the deep hole ball thread hard turning method as described in claim 5, wherein the transmission unit includes a driving wheel for being driven by the rotary driving unit for rotation, and a driving wheel for being driven by the driving wheel for rotation and for driving The passive wheel of the rotating unit. The lathe device of the deep hole ball thread hard turning method as described in claim 2, 3, or 4, wherein the chuck mechanism includes a first linear drive unit for driving the workpiece fixed seat to move and feed. The lathe device of the deep hole ball thread hard turning method as described in claim 7, wherein the first linear drive unit drives the workpiece fixing seat to move in a Y-axis direction, and the second linear drive unit drives the cutter bar fixing seat at An X axis moves back and forth, and the Y axis and the X axis are perpendicular to each other. The lathe device of the deep-hole ball thread hard turning method as described in claim 2, 3, or 4, wherein the tool bar fixing seat of the tool feeding mechanism includes a tool bar fixing seat body, and one is disposed on the tool bar fixing seat body The first support of the first end of the cutter bar and a second support provided on the body of the holder of the cutter bar and fixed at the second end of the cutter bar are fixed. The lathe device of the deep-hole ball thread hard turning method as described in claim 9, wherein the second support includes a sliding seat provided on the body of the holder for moving and a sliding seat provided on the sliding seat Tool bar clamp for connecting or separating with the second end of the tool bar.

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