CN209334733U - Deep hole ball screw thread hard type turning lathe equipment - Google Patents

Abstract

The utility model provides a deep hole ball screw thread hard type lathe equipment of lathe work for hole pore wall cutting at ball nut goes out ball screw, and it mainly contains: a processing machine base; the clamping head mechanism is arranged on the processing machine base, clamps and positions the outer diameter of a ball nut by using the clamping head mechanism, and drives the ball nut to rotate and simultaneously linearly move and feed towards the Y-axis; the cutter feeding mechanism is provided with a moving seat, two ends of the moving seat are respectively provided with a cutter bar fixing seat and a cutter bar which passes through an inner hole of the ball nut and does not rotate, and two ends of the cutter bar are fixed by the cutter bar fixing seats at the ends and are combined with a cutting blade on the cutter bar; the utility model discloses a processing machine base and chuck mechanism make ball nut feed at C axial and Y axial rotating, and the cutting blade feeds in the X axial through removing the seat, and the equal fixed structure in cutter arbor two ends can reach deep hole processing and prevent the purpose of shake sword.

Description

Lathe equipment for hard turning of deep hole ball thread

technical field

The utility model relates to a processing machine, in particular to a kind of lathe equipment specially used for cutting and processing the deep-hole ball thread hard turning process of the screw groove in the inner hole of the high-lead ball nut.

Background technique

In order to improve the production efficiency of industrial processing, the mobile bases of many CNC machine tools are mostly driven by linear motors that can move at high speed. However, in addition to the high price of this linear motor, its precision control needs to be applied with 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 for high-speed movement. solution. The drive of the traditional CNC machine tool mobile base is mostly controlled by the ball nut and the screw rod to control the drive and precise positioning. However, when the lead of the ball nut and the screw is less than 2 times or even 3 times, the effect of high-speed movement is difficult to achieve. Therefore, ball nuts and screws with 2 times and 3 times high lead are the key to the development of high-speed movement of CNC machine tools.

The ball nut and the screw use recirculating balls as the rolling medium. In order to make the ball nut run more precisely and smoothly on the screw, the ball grooves in the ball nut that are in contact with the balls will be hardened by heat treatment. and grinding process to improve the dimensional accuracy and geometric accuracy of the bead groove of the thread. The schematic diagram of the grinding process shown in FIG. However, when the specifications of the ball nut are pulled to 2 times and 3 times the high lead specification, the grinding process of the ball groove of the thread cannot be achieved by traditional grinding equipment, such as the grinding wheel 100 disclosed in Figure 2, because the wheel shaft and One end of the ball nut 200 interferes, so it is impossible to grind deeply into the inner hole 201 of the ball nut 200 at the lead angle of the ball groove of the thread.

In addition, there are also manufacturers who use hard cutting to replace the grinding process, so that the ball nut workpiece is first rough-machined and heat-treated and hardened, and then directly use CBN (boron nitride) turning tools to precisely carve the thread bead groove. The processing method is shown in Fig. 3 and Fig. 4. One end of the ball nut 10' is clamped on the collet 20 of the turning machine, and the tool holder 30 is fixed with a knife handle 40, and the front end of the knife handle 40 has a CBN (nitrided Boron) blade 50; thereby, the movement of the tool seat 30 is controlled, and the CBN (boron nitride) blade 50 at the front end of the knife handle 40 is inserted into the inner hole 101' of the ball nut 10' to perform cutting of the thread bead groove.

However, no matter it is a traditional turning machine or a CNC turning machine, only the rear end of the knife handle 40 is fixed on the knife seat, and the front end (including the blade 50) of the knife handle 40 is in a suspended state. , 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 it is easy to generate vibration of the handle 40 during cutting, resulting in poor cutting surface precision, shortened tool life, and enlarged dimensional errors. .

In addition, the machining operations such as turning and drilling of the above two methods are all carried out by CNC. Therefore, after the nut material is loaded on the processing machine, it must take a long time to calibrate, otherwise there will be problems with accuracy. This increases the difficulty of the assignment and the time it takes to complete it. Therefore, the traditional processing method of nut materials has problems such as expensive production machine costs, long overall processing time, poor accuracy, or a lot of calibration time. Many shortcoming of above-mentioned known technology should try to get rid of.

Utility model content

In view of this, the purpose of this utility model is to provide a kind of lathe equipment for hard turning of deep hole ball thread, which makes the ball nut of deep hole Clamped in the collet mechanism to rotate, and the tool rod of the tool feeding mechanism passes through the inner hole of the ball nut, and fixes the two ends of the tool rod in a non-rotating state, so that the cutting blade on the tool rod is opposite to the rotating ball The inner hole wall of the nut is cut, thereby cutting out the ball groove, which is suitable for deep hole machining of ball groove, improving the machining precision of ball groove, optimizing the cutting surface of ball groove, extending the use of tool holder and cutting blade purpose of life.

In order to achieve the above-mentioned purpose, the lathe equipment of the deep hole ball screw thread hard turning of the present utility model cuts and processes the ball screw groove on the inner hole wall of a ball nut, including: a processing machine base; a Y-axis A collet mechanism that rotates towards the feed and C axial directions, the collet mechanism has a workpiece fixing seat arranged on the base of the processing machine, and a workpiece fixing seat is arranged on the workpiece fixing seat for fixing the ball nut and for The rotating unit that drives the ball nut to rotate, and a rotary drive unit that is arranged on the workpiece fixing seat for driving the rotating unit to rotate; and an X-axis tool feeding mechanism, the tool feeding mechanism has a A non-rotating knife rod that passes through the inner hole of the ball nut, the knife rod is a long rod body, and one is combined with the knife rod to cut the inner hole wall of the ball nut to form the ball nut. The cutting blade of the groove, one is set on the base of the processing machine to fix the two ends of the tool bar and to drive the tool bar to move and feed, and one is used to drive the tool bar to move Feed to the second linear drive unit.

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

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

In the above-mentioned lathe equipment for deep-hole ball thread hard turning, the chuck mechanism includes a transmission unit for being driven by the rotation drive unit and for driving the rotation unit.

In the above-mentioned lathe equipment for deep-hole ball screw thread hard turning, the transmission unit includes a driving wheel for being driven to rotate by the rotating drive unit, and a passive wheel for being driven by the driving wheel to rotate and driving the rotating unit. wheel.

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

In the above-mentioned lathe equipment for hard turning of deep hole ball thread, the first linear drive unit drives the workpiece holder to reciprocate in a Y axis, and the second linear drive unit drives the tool holder holder to move in an X direction. The axis moves back and forth, and the Y axis and the X axis are perpendicular to each other.

In the above-mentioned lathe equipment for hard turning of deep-hole ball thread, the tool bar holder of the tool feeding mechanism includes a tool bar holder body, and a tool bar holder body is arranged on the tool bar holder body and fixes the first end of the tool bar. A first support, and a second support arranged on the main body of the knife rod fixing seat and fixed on the second end of the knife rod.

In the above-mentioned lathe equipment for hard turning of deep-hole ball thread, the second support includes a sliding seat arranged on the body of the knife rod fixing seat for moving, and a sliding seat arranged on the sliding seat for contacting the knife A toolholder clamp that connects or decouples the second end of the rod.

The lathe equipment of the utility model for deep-hole ball thread hard turning processing can achieve the following effects:

1. The two ends of the knife bar are fixed by the knife bar fixing seat, and the knife bar and the blade become non-rotating components, and the ball nut becomes a rotating state, so that the two ends of the knife bar can be stabilized, Reduce the vibration generated during the cutting process of the blade, and improve the problems of poor cutting surface accuracy, shortened tool life and dimensional errors in known cutting technologies;

2. Use a tapered clamping sleeve or a multi-jaw chuck to form the rotating clamping unit to realize the mechanism of clamping the ball nut to rotate;

3. The driving wheel of the transmission unit directly drives the driven wheel, so that the driven wheel drives the rotating clamping unit, which can meet the load during heavy cutting;

4. Through the sliding seat and the tool rod clamp of the second support, the tool rod clamp can not only clamp one end of the tool rod, but also be separated from one end of the tool rod, so that the ball to be cut can be loaded Screw the nut to the rotating unit, or remove the ball nut that has been cut and processed from the rotating unit.

Description of drawings

1 is a schematic diagram of a ball screw groove of a known grinding-processed low-lead ball nut;

Fig. 2 is a schematic diagram of the known interference state of the ball screw groove of the grinding-processed high-lead ball nut;

Fig. 3 is the equipment schematic diagram of the ball screw groove of the known turning machine processing ball nut;

Fig. 4 is a schematic diagram of the action of the ball screw groove of the known turning machine to process the ball nut;

Fig. 5 is the three-dimensional schematic diagram of the preferred embodiment of the lathe equipment of hard turning of the present invention;

Fig. 6 is a partially exploded schematic diagram of a preferred embodiment of the lathe equipment for hard turning of the utility model;

Fig. 7 is a front view exploded schematic diagram of a preferred embodiment of the chuck mechanism and the tool feeding mechanism of the present invention;

Fig. 8 is a rear view exploded schematic diagram of a preferred embodiment of the chuck mechanism and the tool feeding mechanism of the present invention;

Fig. 9 is an exploded schematic diagram of some components of a preferred embodiment of the chuck mechanism of the present invention;

Fig. 10 is a front view cross-sectional schematic diagram of a preferred embodiment of the lathe equipment for hard turning of the present invention;

Fig. 11 is a front view cross-sectional schematic diagram of a preferred embodiment of the second support of the present invention;

Fig. 12 is a schematic diagram of the pre-processing of the tool bar and the blade of the utility model extending into the ball nut;

Fig. 13 is a schematic diagram of the tool bar and the blade of the utility model extending into the ball nut to process the ball screw groove.

in:

1-processing machine base; 10-ball nut; 101-inner hole; 102-ball screw groove; 11-platform;

2- chuck mechanism; 21- workpiece fixing seat; 22-rotation unit; 221-rotation clamping unit; 23-rotation drive unit; 24-first linear drive unit; 241-ball slide rail; 242-ball slider ; 243-ball lead screw module; 25-transmission unit; 251-driving wheel; 252-passive wheel; 253-taper hole;

3-tool feed mechanism; 31-tool bar; 32-cutting blade; 33-tool bar holder; 331-tool bar holder body; 332-first support; 333-second support; 3331-sliding seat ; 3332-tool holder fixture; 34-second linear drive unit; 341-ball slide; 342-ball slider; 343-ball guide screw module.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described and can be implemented, but the examples given are not as limitations of the utility model.

Referring to Fig. 5, Fig. 6 and shown in Fig. 7, the lathe equipment of the utility model deep-hole ball thread hard turning processing, it is a kind of for cutting and processing a ball nut 10 inner hole 101 hole wall. The hard turning method of groove 102 and the special-purpose processing lathe equipment, its preferred embodiment includes: a processing machine base 1, a collet mechanism 2 and a tool feed mechanism 3 three main mechanisms, wherein: the processing Machine base 1 is preferably implemented as a base formed by casting or steel plate welding, and implements a platform 11 for installing rails and other mechanisms on its top surface. This platform 11 is preferably in a horizontal state, and can also be implemented as a The inclined state is used for setting the chuck mechanism 2 , the tool feeding mechanism 3 and other electrical equipment on the platform 11 .

The collet mechanism 2 is used to fix the ball nut 10 and drive the ball nut 10 to perform Y-axis feed and C-axis rotation. The workpiece fixing seat 21 on the platform 11, the workpiece fixing seat 21 is a rectangular stand with an installation space inside; a rotating unit 22 arranged on the workpiece fixing seat 21 for clamping the ball nut 10, the rotating Unit 22 is also used to drive the ball nut 10 to rotate and feed; and a rotary drive unit 23 arranged in the workpiece holder 21 to drive the rotation unit 22 to rotate, the rotary drive unit 23 is a motor that converts electrical energy into mechanical energy ; Thereby, during the cutting process, the rotation unit 22 and the ball nut 10 are driven to rotate by the rotation drive unit 23 .

And this tool feeding mechanism 3 is used to stretch into the inner hole 101 of this ball nut 10, cuts out the X axial feeding mechanism of ball groove 102 in the hole wall of this inner hole 101, and its preferred implementation has a function For the cutter bar 31 that passes through the inner hole 101 of the ball nut 10 and does not rotate during cutting, the cutter bar 31 can specifically be implemented as a long bar with a circular or other shape in section; a combination On this knife bar 31, be used to cut the inner hole 101 wall of this ball nut 10 to form the cutting blade 32 of this ball screw groove 102, this cutting blade 32 is existing product; One is arranged on this processing machine base 1 is used to fix the knife bar holder 33 at the two ends of the knife bar 31, and the knife bar holder 33 is also used to drive the knife bar 31 and the cutting blade 32 to move and feed; and one is used to drive the knife bar to fix The seat 33 moves to feed the second linear drive unit 34 of the tool.

In the lathe equipment for deep hole ball thread hard turning of the present utility model, basically as long as the second linear drive unit 34 drives the tool bar holder 33, it is possible to feed the tool bar 31 and the cutting blade 32. A ball screw groove 102 is cut out of the wall of the inner hole 101 of the nut 10 . However, in order to flexibly apply ball nuts 10 of various sizes for processing, as shown in FIG. 6 , the chuck mechanism 2 above preferably implements a first linear drive for driving the workpiece holder 21 to move and feed the workpiece. Unit 24, through the configuration 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, Achieve the functions of workpiece rotary feed and linear feed. The above-mentioned second linear drive unit 34 drives the tool bar holder 33 to move back and forth in a horizontal X-axis, and the Y-axis and the X-axis are perpendicular to each other, which can be compatible with the feeding of the workpiece. The tool is fed in coordination with the actions, 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 utility model is to make the chuck mechanism 2 clamp the outer diameter of the ball nut 10, and drive the ball nut 10 to rotate in the C-axis and move toward the Y-axis to feed; And this tool feed mechanism 3 has a knife bar 31 that passes through the inner hole of the ball nut 10 and does not rotate, so that the two ends of the knife bar 31 are respectively fixed on the knife bar holder 33, and the knife bar 31 is combined with cutting Blade 32; thereby, the ball nut 10 can be driven by the collet mechanism 2 to rotate in the C axial direction and move in the Y axial direction, while the tool bar 31 is fixed and does not rotate and only performs X axial feeding (such as 12 and FIG. 13 ), the cutting blade 32 on the knife bar 31 is processed into a ball screw groove in the inner hole of the ball nut 10, and since the two ends of the knife bar 31 are fixed on the knife bar holder 33, Therefore, the vibration problem during cutting can be suppressed, and the effects of improving the machining precision of the ball groove, optimizing the cutting surface of the ball groove, and prolonging the service life of the tool holder and the cutting blade can be achieved.

Referring again to Fig. 6, the above-mentioned first linear drive unit 24 and the second linear drive unit 34 are preferably implemented with two ball slide rails 241, 341 respectively, so that the two ball slide rails 241, 341 are respectively fixed 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 be aligned with the above-mentioned Y axis. X-axis linear sliding; and a ball guide screw module 243, 343 arranged between each of the two ball guide rails 241, 341, the ball guide screw module 243, 343 includes a motor, a ball guide screw and a ball nut In this way, the workpiece fixing seat 21 is installed on the ball slider 242 and the ball guide screw module 243, and the workpiece fixing seat 21 can be driven to reciprocate and feed in the Y-axis; and the above-mentioned tool bar The fixing seat 33 is installed on the ball slider 342 and another set of the ball lead screw module 343 , and can drive the tool bar fixing seat 33 to reciprocally move and feed in the X-axis.

Referring to Fig. 8, Fig. 9 and Fig. 10, the above-mentioned rotating unit 22 of the collet mechanism 2 can be specifically implemented as a rotating clamping unit 221 for clamping on the outer diameter of the ball nut 10, the rotating clamping The clamping unit 221 can be one of a tapered clamping sleeve or a multi-jaw chuck, and is used to clamp the outer diameter of the ball nut 10 for rotational feeding of the workpiece. The above-mentioned rotary drive unit 23 of the collet mechanism 2 can be a DC motor, so that the motor shaft directly drives the above-mentioned rotary unit 22, and a preferred embodiment implements a drive unit for being driven by the rotary 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 drive unit 23, and a passive driving wheel 251 for being driven to rotate by the driving wheel 251 and for driving the rotating unit 22. Wheel 252, the driving wheel 251 and the driven wheel 252 are preferably meshed gears. Wherein, the shaft center of the passive wheel 252 is provided with a tapered hole 253, whereby 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 can be used to Pull the tapered clamping sleeve into the tapered hole 253 to clamp the outer diameter of the ball nut 10 with the tapered clamping sleeve, and then drive the ball nut 10 to rotate and feed through the driven wheel 252 .

Referring again to Fig. 5 and shown in Fig. 11, the tool bar holder 33 of the tool feeding mechanism 3 of the present utility model is used to support the mechanism at the two ends of the tool bar 31 to prevent the tool bar 31 from vibrating during cutting. A preferred implementation has a knife rod holder body 331, a first support 332 that is arranged on the knife rod holder body 331 and fixes the first end of the knife rod 31, and a knife rod holder body that is arranged on the knife rod holder body. 331 and is fixed on the second support 333 of the second end of the knife bar 31, so that the two ends of the knife bar 31 can be fixed to prevent the knife bar 31 from vibrating during cutting. In order to make the above-mentioned knife rod 31 pass through the inner hole 101 of the ball nut 10 quickly and conveniently, so that the ball nut 10 can be clamped on the above-mentioned rotating clamping unit 221, and at the same time, the knife can be quickly restored. The two ends of the rod 31 are fixed. The utility model selects the second support 333 to implement a sliding seat 3331 arranged on the body 331 of the knife bar holder for moving, and a sliding seat 3331 arranged on the sliding seat 3331 for moving. The knife bar clamp 3332 that is connected or separated from the second end of the knife bar 31, the knife bar clamp 3332 can be an existing multi-claw chuck; thereby, as shown in Figure 7, when the knife bar clamp 3332 is released When the second end of the knife rod 31 moves backward, the second end of the knife rod 31 can pass through the inner hole 101 of the ball nut 10, so that the ball nut 10 is clamped in the above-mentioned rotation on the clamping unit 221 , and then clamp the second end of the knife bar 31 by the knife bar clamp 3332 .

The lathe equipment of the utility model for deep-hole ball thread hard turning processing can fix the two ends of the knife bar 31 through the knife bar fixing seat 33, so that the knife bar 31 and the blade 32 become non-rotating components, and the ball nut 10 becomes the state of rotating feed, so that the two ends of the tool bar 31 can be stabilized, the vibration generated during the cutting of the blade 32 can be reduced, and the poor cutting surface precision, shortened tool life and dimensional error in the known cutting technology can be improved. And other issues. The rotary clamping unit 221 is formed by using the above-mentioned tapered clamping sleeve or the multi-jaw chuck, which can realize the function of clamping the ball nut 10 and rotating and feeding it. Furthermore, through the sliding seat 3331 and the knife bar clamp 3332 of the second support 333 of the knife bar fixing seat 33, the knife bar clamp 3332 can not only clamp one end of the knife bar 31, but also can be connected with the knife bar. One end of 31 is separated, so that the ball nut 10 to be cut can be loaded into the rotating unit 22 , and the ball nut 10 that has been cut can also be separated and removed from the rotating unit 22 .

The above-mentioned embodiments are only preferred embodiments for fully illustrating the utility model, and the protection scope of the utility model is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present utility model are all within the protection scope of the present utility model. The scope of protection of the utility model shall be determined by the claims.

Claims (9)

1. A kind of lathe equipment of deep-hole ball screw thread hard turning processing, it cuts and processes the ball screw groove on the inner hole wall of a ball nut, it is characterized in that, comprises: a processing machine base; A chuck mechanism for feeding and C axial rotation, the chuck mechanism has a workpiece fixing seat arranged on the base of the processing machine, and a workpiece fixing seat arranged on the workpiece fixing seat is used to fix the ball nut and drive The rotating unit that the ball nut rotates, and a rotating drive unit arranged on the workpiece fixing seat for driving the rotating unit to rotate; and an X-axis tool feeding mechanism, the tool feeding mechanism has a tool for A knife rod that passes through the inner hole of the ball nut and does not rotate. The knife rod is a long rod body, and one is combined with the knife rod to cut the inner hole wall of the ball nut to form the ball screw groove A cutting blade, a tool bar fixing seat set on the base of the processing machine for fixing the two ends of the tool bar and driving the tool bar to move and feed, and a tool bar fixing seat for driving the tool bar to move forward Give the second linear drive unit. 2 . The lathe equipment for deep-hole ball thread hard turning according to claim 1 , wherein the rotating unit is a rotating clamping unit for clamping on the outer diameter of the ball nut. 3 . 3 . The lathe equipment for deep hole ball thread hard turning according to claim 2 , wherein the rotating clamping unit is one of a tapered clamping sleeve or a multi-jaw chuck. 4 . 4 . The lathe equipment for deep hole ball thread hard turning according to claim 1 , wherein the chuck mechanism comprises a transmission unit for being driven by the rotation driving unit and for driving the rotation unit. 4 . 5. The lathe equipment for deep-hole ball screw thread hard turning as claimed in claim 4, wherein the transmission unit includes a drive wheel for being driven to rotate by the rotation drive unit, and a drive wheel for being driven by the drive wheel Drives the driven wheel that rotates and is used to drive the rotating unit. 6. The lathe equipment for deep-hole ball thread hard turning as claimed in claim 1, 2 or 3, wherein the collet mechanism includes a first linear drive for driving the workpiece holder to move and feed unit. 7. The lathe equipment for deep hole ball thread hard turning as claimed in claim 6, wherein the first linear drive unit drives the workpiece holder to reciprocate in a Y axis, and the second linear drive unit The unit drives the tool rod holder to move back and forth in an X-axis, and the Y-axis and the X-axis are perpendicular to each other. 8. The lathe equipment for deep-hole ball thread hard turning as claimed in claim 1, 2 or 3, wherein the tool bar holder of the tool feeding mechanism comprises a tool bar holder body, and a tool bar holder body is arranged on the tool bar. A first support on the body of the rod fixing base and fixes the first end of the knife rod, and a second support arranged on the body of the knife rod fixing base and fixed on the second end of the knife rod. 9. The lathe equipment for deep-hole ball screw thread hard turning as claimed in claim 8, wherein the second support includes a sliding seat arranged on the body of the cutter bar holder for movement, and a set A tool holder clamp for connecting or separating from the second end of the tool bar on the sliding seat.