CN208214508U - High-precision spiral case making lathe and its Measurement and Control System with on-line checking mechanism - Google Patents
High-precision spiral case making lathe and its Measurement and Control System with on-line checking mechanism Download PDFInfo
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- CN208214508U CN208214508U CN201820195998.9U CN201820195998U CN208214508U CN 208214508 U CN208214508 U CN 208214508U CN 201820195998 U CN201820195998 U CN 201820195998U CN 208214508 U CN208214508 U CN 208214508U
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Abstract
The utility model discloses a kind of high-precision spiral case making lathes and its Measurement and Control System with on-line checking mechanism, belong to on-line checking field, including big column and the workbench being arranged on lathe bed, big column is equipped with slide plate, by driving device, the on-line checking mechanism of measuring device composition, driving device includes the slide being arranged in mounting base, fixing seat and travel switch, mounting base is fixed on slide plate bottom, measuring device is mounted on slide, fixing seat is equipped with piston, accommodating cavity compatible with piston is additionally provided on slide, the switching starter that matches with travel switch and and accommodating cavity in the rear hydraulic fluid port and preceding hydraulic fluid port for being located at piston two sides and being respectively communicated with.Measuring device is clamped on slide plate by driving device and realizes the small stroke feeding of measuring device by this high-precision spiral case making lathe, to detect this mach worm gear pitch error and tooth pitch accumulation overall error, and have and improve measuring device repetitive positioning accuracy, to improve the effect of measurement accuracy.
Description
Technical field
The utility model belongs to online measuring technique field, and in particular to a kind of high-precision worm gear with on-line checking mechanism
Machining tool and its Measurement and Control System accumulate worm gear pitch error and tooth pitch when for turbine machining tool processing turbine total
The on-line checking that error carries out.
Background technique
Turbine is a kind of rotary power machinery that the energy of flow working medium is converted to mechanical energy, is widely used in boat
The fields such as empty engine, gas turbine, steam turbine.Turbine machining tool is machined as turbine, various in addition to that can process
Outside worm gear, it is also necessary to complete the projects such as pitch error fpt, tooth pitch accumulation overall error Fp to turbine in turbine machining process
Detection, and targetedly the movement of each axis of spiral case making lathe can be compensated by digital control system according to testing result, with
Error is eliminated, the machining accuracy of worm gear is improved.Therefore, in order to facilitate promoted turbine machining tool machining accuracy and efficiency,
How to realize that turbine machining on-line checking is highly desirable to carry out correlative study.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of high-precision spiral case making machine with on-line checking mechanism
Bed and its Measurement and Control System, in the case where not needing the X-axis motion conditions of turbine machining tool, realize the small stroke of measuring device into
The problem of giving to assist completing the on-line checking to turbine, and can solve measuring device resetting.
Following technical solution that in order to achieve the above object, the utility model provides:
The utility model provides a kind of high-precision spiral case making lathe with on-line checking mechanism, including is arranged on lathe bed
The slide plate that can be slided along Z axis, workbench can be equipped with along the big column that X-axis is slided and the workbench that can be rotated around C axis, big column
On for placing turbine to be processed, further include on-line checking mechanism, be made of driving device, measuring device, driving device is used for
Measuring device is clamped on slide plate and realizes that measuring device can be fed along the small stroke of X-axis, driving device includes that setting is being pacified
Slide, fixing seat and the travel switch on seat are filled, mounting base is fixed on slide plate bottom, and measuring device is mounted on slide, and sliding
Seat can do reciprocating linear motion in mounting base along the direction of feed of measuring device, and fixing seat is equipped with piston, also set on slide
Have accommodating cavity compatible with piston, the switching starter to match with travel switch and and accommodating cavity be located at piston two sides
The rear hydraulic fluid port and preceding hydraulic fluid port being respectively communicated with.
Further, the travel switch is reset switch and work bit switch, and reset switch and work bit switch are along measurement
The direction of feed of device is successively on the inside of mounting base of the arranged for interval above slide.
Further, the switching starter is collision block or inductive switch, and collision block or inductive switch are by contacting or incuding phase
Accordingly is combined with the control switch formation in reset switch and work bit switch with disconnection, resetted and working position with controlling
Stroke terminal.
It further, further include that transition connects disk, measuring device is installed on transition and connects on disk, and transition connects disk and is mounted on slide.
It further, further include protective cover, protective cover is installed on transition and connects on disk.
Further, linear guide is connected in the mounting base, the bottom of the slide is equipped with to be slided with the linear guide
The guide rail slide block of cooperation, the linear guide is double-rail configuration, using T-type or swallow-tail form.
Further, further include position-limit mechanism, be made of positioning screw, nut, positioning seat, positioning seat is set to the bottom of mounting base
Portion, positioning screw are arranged on positioning seat and are locked by nut and positioning seat.
It further, further include the back shroud and front shroud for being set on slide and being located at accommodating cavity both ends, slide and back shroud
Sealing ring is equipped between front shroud, sealing ring is O-ring seal, and rotary sealing is equipped between the bar portion and back shroud of piston
Pad.
Further, further include by the first rest pad be set to mounting base at least two lateral support structures and pass through
Second rest pad is set at least two longitudinal supporting structures on slide, the supporting direction of lateral support structure and slide movement side
Intersect in horizontal vertical, the supporting direction of longitudinal supporting structure is in vertically to intersect vertically with the slide direction of motion, lateral support
Structure and longitudinal supporting structure are made of spring and steel ball.
The utility model also provides a kind of measurement of high-precision spiral case making lathe based on above-mentioned with on-line checking mechanism
Control system, including Siemens's 840Dsl digital control servo system, numbered card and data collecting card, the Siemens 840Dsl numerical control
Servo-system is equipped with PCU module, NCU module, S120 module, SMC module and ET module, the numbered card insertion PCU module
In PCI slot, for the counting to workbench Circular gratings data；In the PCI slot of the data collecting card insertion PCU module,
For the acquisition to measuring device data；The PCU module is connect by Ethernet with NCU module communication；The NCU module is logical
It crosses SMC module and is connected to numbered card；The NCU module also passes through ET module to numbered card switch control total amount and lathe switching value
Input acquisition and output control；It is sliding along X-axis around the rotation of C axis, big column to workbench that the NCU module also passes through S120 module
Dynamic, slide plate slided along Z axis and driving device along X-axis feed motion control.
The beneficial effects of the utility model are: this high-precision spiral case making lathe passes through driving device for measuring device clamping
It is total accidentally to detect this mach worm gear pitch error and tooth pitch accumulation on slide plate and realizing the small stroke feeding of measuring device
Difference, and have and improve measuring device repetitive positioning accuracy, to improve the effect of measurement accuracy.
Other advantages, target and feature of the utility model will be explained in the following description to a certain extent
It states, and to a certain extent, based on will be apparent to those skilled in the art to investigating hereafter, or
Person can be instructed from the practice of the utility model.The target of the utility model and other advantages can be said by following
Bright book is achieved and obtained.
Detailed description of the invention
It is practical to this below in conjunction with attached drawing in order to keep the purpose of this utility model, technical solution and advantage clearer
It is novel to be preferably described in detail, in which:
Fig. 1 is that the utility model spiral case making lathe is installing the structural schematic diagram after line testing agency；
Fig. 2 is the schematic diagram of the Measurement and Control System of the utility model turbine machining tool；
Fig. 3 is the structural plan schematic diagram of the utility model on-line checking mechanism；
Fig. 4 is the P of Fig. 3 to schematic diagram；
Fig. 5 is 6 grades of Error Graphs that accuracy class is GB10089-88 standard before compensating；
Fig. 6 is 4 grades of Error Graphs that accuracy class is GB10089-88 standard after compensating.
Specific embodiment
The utility model is further described With reference to embodiment.Wherein, being given for example only property of attached drawing
Illustrate, expression is only schematic diagram, rather than pictorial diagram, should not be understood as the limitation to this patent；In order to which this reality is better described
With novel embodiment, the certain components of attached drawing have omission, zoom in or out, and do not represent the size of actual product；To ability
For field technique personnel, the omitting of some known structures and their instructions in the attached drawings are understandable.
The same or similar label correspond to the same or similar components in the attached drawing of the utility model embodiment；It is practical at this
In novel description, it is to be understood that if having the instructions such as term " on ", "lower", "left", "right", "front", "rear" orientation or
Positional relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of describing the present invention and simplifying the description,
Rather than the device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation, because
The terms describing the positional relationship in the drawings are only for illustration for this, should not be understood as the limitation to this patent, for ability
For the those of ordinary skill in domain, the concrete meaning of above-mentioned term can be understood as the case may be.
Fig. 1,3,4 are please referred to, the element numbers in attached drawing respectively indicate: driving device 100, measuring device 200, slide plate
300, worm gear 400；Wherein, transition connects disk 1, positioning screw 2, nut 3, positioning seat 4, rear bearing block 5, spring 6, steel ball 7, installation
Seat 8, slide 9, accommodating cavity 10, fixing seat 11, piston 12, rotary sealing pad 13, back shroud 14, sealing ring 15, linear guide 16,
It is guide rail slide block 17, switching starter 18, rear hydraulic fluid port 19, reset switch 20, work bit switch 21, preceding hydraulic fluid port 22, protective cover 23, preceding
Cover board 24, front support block 25.
Embodiment is basic as shown in attached drawing 1,3,4: the high-precision worm gear provided in this embodiment with on-line checking mechanism adds
Work lathe, can be along the big column (unmarked) that X-axis is slided and the work that can be rotated around C axis including being arranged on lathe bed (unmarked)
Platform (unmarked), big column are equipped with the slide plate 300 that can be slided along Z axis, are used to place turbine 400 to be processed on workbench, also
It including online testing agency, is made of driving device 100, measuring device 200, driving device 100 is for filling measuring device 200
It is sandwiched on slide plate and realizes that measuring device 200 can be fed along the small stroke of X-axis, driving device 100 includes being arranged in mounting base 8
Slide 9, fixing seat 11 and travel switch, mounting base 8 is mounted on 300 bottom of slide plate of the big column of turbine machining tool,
Measuring device 200 connects disk 1 by transition and is mounted on slide 9, and slide 9 can installed along the direction of feed of measuring device 200
It does reciprocating linear motion on seat 8, piston 12 is fixedly installed in fixing seat 11, is additionally provided on slide 9 compatible with piston 12
Accommodating cavity 10, the switching starter 18 to match with travel switch and with accommodating cavity 10 be located at 12 two sides of piston be respectively communicated with
Rear hydraulic fluid port 19 and preceding hydraulic fluid port 22；Travel switch is reset switch 20 and work bit switch 21, and reset switch 20 and working position are opened
Close 21 directions of feed successively on the inside of mounting base 8 of the arranged for interval in slide 9 above along measuring device 200；Switching starter 18
Using collision block, collision block by contact correspondingly with reset switch 20 and work bit switch 21 in control switch formed combined with
It disconnects, is resetting the stroke terminal with working position to control；Linear guide 16 is connected in mounting base 8, the bottom of slide 9 is equipped with
The guide rail slide block 17 being slidably matched with the linear guide 16, linear guide 16 use double-rail configuration, are T-type or swallow-tail form；It drives
Dynamic device 100 further includes position-limit mechanism, realizes hard limiting effect, is made of positioning screw 2, nut 3, positioning seat 4, positioning seat 4
Set on the bottom of mounting base 8, positioning screw 2 is arranged on positioning seat 4 and is locked by nut 3 and positioning seat 4；On slide 9
And be located at 10 both ends of accommodating cavity and be equipped with back shroud 14 and front shroud 24, it is equipped between slide 9 and back shroud 14 and front shroud 24 close
Seal 15, the sealing ring 15 use O-ring seal, and rotary sealing pad 13 is equipped between the bar portion and back shroud 14 of piston 12；It drives
Dynamic device 100 further includes at least two lateral support structures being set in mounting base 8 by the first rest pad 5 and by second
Rest pad 25 is set at least two longitudinal supporting structures on slide 9, the supporting direction of lateral support structure and 9 side of moving of slide
Intersect in horizontal vertical, the supporting direction of longitudinal supporting structure is in vertically to intersect vertically with 9 direction of motion of slide, lateral support
Structure and longitudinal supporting structure are made of spring 6 and steel ball 7.
Specifically, mounting base 8 is fixed, measuring device 200 is fixed on transition and connects on disk 1, and transition connects disk and passes through
Screw is fixed on slide 9, and piston 12 is locked in fixing seat 11 by two screw-nuts, and piston is mounted on the accommodating of slide
In chamber 10, both ends are fixed by back shroud 14 and the sealings such as front shroud 24 and rotary seal ring 13 and O-shaped sealing ring 15；
Linear guide 16 and guide rail slide block 17 are installed, slide is mounted on guide rail slide block in mounting base；This is with on-line checking mechanism
The motion process of high-precision spiral case making lathe are as follows: when after 19 oil inlet of hydraulic fluid port, when preceding 22 oil return of hydraulic fluid port, driving slide is towards X pros
To movement, the switching starter 18 being fixed on slide is detached from reset switch 20, after reaching designated position, opens with working position
21 contacts to be closed, while being additionally provided with hard limiting, that is, positioning seat 4 and positioning screw 2 are installed, positioning screw is mounted on positioning seat,
And locked by nut 3, positioning seat is fixed by screws in mounting base, by adjusting positioning after slide reaches designated position
Screw position cannot be further continued for moving ahead so that positioning screw is contacted with slide；Slide executes measuring device 200 afterwards in place and executes
Measurement movement.It is installed simultaneously in order to eliminate slide gap of Y-direction in X-direction movement provided with two springs 6 and steel ball 7
On the first rest pad 5, the first rest pad is fixed by screws in mounting base, when slide is in backhaul, steel ball in slot, when
When slide is ready for forward measurement movement, steel ball leaves slot in the plane, applies the power of a Y-direction to slide, eliminates the side Y
To gap, guarantee slide kinematic accuracy, simultaneously, in the Z-direction of slide movement, also there are two spring 6 and steel ball 7,
It is mounted on the second rest pad 25, the second rest pad is fixed by screws on slide, and spring 6 and steel ball 7 are to slide Z-direction lower section
Apply a power, so that slide is affixed to a side always when moving, eliminates in the gap of Z-direction, to guarantee measuring device in X
Kinematic accuracy when being moved back and forth on direction, to guarantee measurement accuracy.If slide counter motion, 22 oil inlet of preceding hydraulic fluid port, after
19 oil return of hydraulic fluid port, slide are then moved towards X-axis negative direction, i.e., measuring device 200 executes recoil movement, and switching starter is detached from work
Bit switch 21 and when touching reset switch 20, slide retracts in place.
Using the above scheme, this high-precision spiral case making lathe with on-line checking mechanism is by pacifying driving device 100
On the slide plate 300 of the big column of lathe, measuring device 200 measure when be processed worm gear 400 do not needed on lathe disassembly (but
Need to stop processing), tested worm gear does dividing movement around its centre of gyration, while picking up worm gear angular signal, measuring device movement
It is driven by oil cylinder and completes and eliminate movement clearance, while rotating progress stretching motion with worm gear, digital control system is completed data and adopted
Collection, and it is automatically performed the detection to projects such as worm gear fpt, Fp.Adjustment movement and precision needed for gauge head are still sharp in detection process
The precision of movement and lathe needed for spiral case making lathe.When lathe is transferred to required position, in order to improve measuring device
The precision of reciprocating motion does not need the X-axis movement of lathe, but design has one small stroke to feed in driving device, improves
Measuring device repetitive positioning accuracy, to improve measurement accuracy.
Switching starter 18 in another embodiment uses inductive switch, i.e., by inductive switch by incuding correspondingly
With reset switch 20 and work bit switch 21 in control switch formation is combined with disconnection, with control reset and working position row
Journey terminal.
Driving device 100 in another embodiment further includes being installed on transition to connect protective cover 23 on disk 1.To drive
Dynamic device 100 is protected away from measuring device 200 away from end, prevents scrap iron from splashing in turbine machining process from entering driving dress
In setting, its operating accuracy is influenced.
As shown in Fig. 2, the utility model also provides a kind of high-precision turbine processing based on above-mentioned with on-line checking mechanism
The Measurement and Control System of lathe, including Siemens's 840Dsl digital control servo system, numbered card and data collecting card, the Siemens
840Dsl digital control servo system is equipped with PCU module, NCU module, S120 module, SMC module and ET module, the numbered card insertion
In the PCI slot of PCU module, for the counting to workbench Circular gratings (not shown) data, to obtain worktable rotary angle；
In the PCI slot of the data collecting card insertion PCU module, for the acquisition to measuring device data, to obtain measuring device
Reading；The PCU module is connect by Ethernet with NCU module communication；The NCU module is connected to counting by SMC module
Card；The NCU module also passes through ET module and the input of numbered card switch control total amount and lathe switching value is acquired and exported control
System；The NCU module also pass through S120 module to workbench around C axis rotation, big column along X-axis slide, slide plate along Z axis sliding and
Control of the driving device along X-axis feed motion.
Specifically, this Measurement and Control System uses the technical solution for sharing digital control system with machine tool control system.Pass through west
In PCI slot in the sub- 840Dsl digital control system PCU module of door, it is inserted into numbered card and data collecting card, is realized to workbench circle
The counting of raster data and the acquisition of measuring device data.Survey Software is mounted in PCU module, and Measurement and Control System passes through
NCU module realizes that the control to workbench rotation and measuring device measurement movement, the control of measuring device measurement movement are main
Have: column is slided along X-axis greatly realizes that its radial motion, slide plate realize that its axial movement, driving device are sliding along X-axis along Z axis sliding
It is dynamic to realize its small stroke feed motion；And the input of Measurement and Control System switching value is adopted by the realization of the ET module of digital control system
Collection and output control, and shaking hands between Measurement and Control System and NCU module in real time is realized using the I/O channel on numbered card；And
Other modules in Siemens's 840Dsl digital control system, such as OP, MCP, HT are routinely general module, are not just being introduced one by one
?.Indexing measurement is mainly carried out using above-mentioned Measurement and Control System, i.e., directly measures the physical location pair of each flank of tooth of worm gear
Then the angular deviation of its theoretical position calculates linear circular pitch deviation；And calculated by digital control system and software, it can be full-automatic
Measurement circulation is completed, speed is fast, high-efficient；To be automatically performed the detection to projects such as worm gear fpt, Fp.In conjunction with attached Figures 5 and 6
As can be seen that can be improved from original 6 grades to 4 grades by accuracy class after the compensation of this Measurement and Control System, precision is significantly improved.
Finally, it is stated that above embodiments are merely intended for describing the technical solutions of the present application, but not for limiting the present application, although ginseng
The utility model is described in detail according to preferred embodiment, those skilled in the art should understand that, it can be to this
The technical solution of utility model is modified or replaced equivalently, should all without departing from the objective and range of the technical program
Cover in the scope of the claims of the utility model.
Claims (9)
1. the high-precision spiral case making lathe with on-line checking mechanism, including the big column that can be slided along X-axis on lathe bed is arranged in
With the workbench that can be rotated around C axis, big column is equipped with the slide plate (300) that can be slided along Z axis, is used to place on workbench to be added
Work turbine (400), which is characterized in that further include on-line checking mechanism, is made of driving device (100), measuring device (200),
Measuring device for being clamped on slide plate and realizing that measuring device can be fed along the small stroke of X-axis by driving device, driving device
Including slide (9), fixing seat (11) and the travel switch being arranged on mounting base (8), mounting base is fixed on slide plate bottom, measures
Device is mounted on slide, and slide can do reciprocating linear motion in mounting base along the direction of feed of measuring device, fixing seat
It is equipped with piston (12), is additionally provided with accommodating cavity (10) compatible with piston on slide, is opened with the switch that travel switch matches
Dynamic device (18) and and accommodating cavity in the rear hydraulic fluid port (19) and preceding hydraulic fluid port (22) for being located at piston two sides and being respectively communicated with；The stroke is opened
Close be reset switch (20) and work bit switch (21), reset switch and work bit switch along measuring device direction of feed successively
Arranged for interval is on the inside of the mounting base above slide.
2. the high-precision spiral case making lathe according to claim 1 with on-line checking mechanism, which is characterized in that described to open
Closing starter is collision block or inductive switch, collision block or inductive switch by contact or induction correspondingly with reset switch and work
Control switch in bit switch forms combination and disconnection, is resetting the stroke terminal with working position to control.
3. the high-precision spiral case making lathe according to claim 1 with on-line checking mechanism, which is characterized in that further include
Transition connects disk (1), and measuring device is installed on transition and connects on disk, and transition connects disk and is mounted on slide.
4. the high-precision spiral case making lathe according to claim 3 with on-line checking mechanism, which is characterized in that further include
Protective cover (23), protective cover is installed on transition and connects on disk.
5. the high-precision spiral case making lathe according to claim 1 with on-line checking mechanism, which is characterized in that the peace
It is connected with linear guide (16) on dress seat, the bottom of the slide is equipped with the guide rail slide block being slidably matched with the linear guide
(17), the linear guide is double-rail configuration, using T-type or swallow-tail form.
6. the high-precision spiral case making lathe according to claim 1 with on-line checking mechanism, which is characterized in that further include
Position-limit mechanism is made of positioning screw (2), nut (3), positioning seat (4), and positioning seat is set to the bottom of mounting base, positioning screw
It is arranged on positioning seat and is locked by nut and positioning seat.
7. the high-precision spiral case making lathe according to claim 1 with on-line checking mechanism, which is characterized in that further include
Back shroud (14) and front shroud (24) on slide and positioned at accommodating cavity both ends, set between slide and back shroud and front shroud
Have sealing ring (15), sealing ring is O-ring seal, is equipped with rotary sealing pad (13) between the bar portion and back shroud of piston.
8. the high-precision spiral case making lathe according to claim 1 with on-line checking mechanism, which is characterized in that further include
It at least two lateral support structures that are set in mounting base by the first rest pad (5) and is set to by the second rest pad (25)
At least two longitudinal supporting structures on slide, supporting direction and the slide direction of motion of lateral support structure are in horizontal vertical phase
It hands over, the supporting direction of longitudinal supporting structure is in vertically to intersect vertically with the slide direction of motion, lateral support structure and longitudinal supporting
Structure is made of spring (6) and steel ball (7).
9. the measurement based on the described in any item high-precision spiral case making lathes with on-line checking mechanism of claim 1-8 controls
System, including Siemens's 840Dsl digital control servo system, numbered card and data collecting card, the Siemens 840Dsl numerical control servo
System is equipped with PCU module, NCU module, S120 module, SMC module and ET module, which is characterized in that the numbered card is inserted into PCU
In the PCI slot of module, for the counting to workbench Circular gratings data；The PCI of the data collecting card insertion PCU module is inserted
In slot, for the acquisition to measuring device (200) data；The PCU module is connect by Ethernet with NCU module communication；Institute
It states NCU module and numbered card is connected to by SMC module；The NCU module also passes through ET module to numbered card switch control total amount
With the input acquisition and output control of lathe switching value；The NCU module also pass through S120 module to workbench around C axis rotation,
Big column slides the control with driving device (100) along X-axis feed motion along X-axis sliding, slide plate (300) along Z axis.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820195998.9U CN208214508U (en) | 2018-02-05 | 2018-02-05 | High-precision spiral case making lathe and its Measurement and Control System with on-line checking mechanism |
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| CN201820195998.9U CN208214508U (en) | 2018-02-05 | 2018-02-05 | High-precision spiral case making lathe and its Measurement and Control System with on-line checking mechanism |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108080749A (en) * | 2018-02-05 | 2018-05-29 | 重庆机床(集团)有限责任公司 | High-precision spiral case making lathe and its Measurement and Control System with on-line checking mechanism |
| CN111570938A (en) * | 2020-05-27 | 2020-08-25 | 南京工程学院 | Workpiece spindle rotation servo driving system of numerical control gear hobbing machine tool |
-
2018
- 2018-02-05 CN CN201820195998.9U patent/CN208214508U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108080749A (en) * | 2018-02-05 | 2018-05-29 | 重庆机床(集团)有限责任公司 | High-precision spiral case making lathe and its Measurement and Control System with on-line checking mechanism |
| CN108080749B (en) * | 2018-02-05 | 2023-12-22 | 重庆机床(集团)有限责任公司 | High-precision worm gear processing machine tool with online detection mechanism and measurement control system thereof |
| CN111570938A (en) * | 2020-05-27 | 2020-08-25 | 南京工程学院 | Workpiece spindle rotation servo driving system of numerical control gear hobbing machine tool |
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