CN205353734U - Hot error compensation device of digit control machine tool - Google Patents
Hot error compensation device of digit control machine tool Download PDFInfo
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- CN205353734U CN205353734U CN201520924248.7U CN201520924248U CN205353734U CN 205353734 U CN205353734 U CN 205353734U CN 201520924248 U CN201520924248 U CN 201520924248U CN 205353734 U CN205353734 U CN 205353734U
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- piezoelectric ceramic
- displacement actuator
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Abstract
The utility model provides a hot error compensation device of digit control machine tool, the device all can realize small displacement in lathe coordinate system X, Y, Z direction to this reduces or offsets the machining error that the hot error of lathe leads to. Three slider is all installed the piezoceramics microbit and is moved the actuator around the direction of motion, as driving element. Threaded hole is opened at vertical direction slider top for mounting fixture. Arrange temperature sensor at lathe temperature sensitive position, the temperature data that will gather inputs the computer, and the computer forecasts out through the hot error model of having establish and the error compensation volume convert output signal to can drive piezoceramics voltage signal again that the moving part of drive error compensation device realizes small displacement. This device do not relate to with lathe servo and numerical control system interface problem, realize the hot error compensation of lathe through external device, the commonality is strong and realizes that the hot error of digit control machine tool compensates in real time automatically.
Description
Technical field
This utility model relates to a kind of micro-displacements that produce in three directions to compensate device and the compensation method of numerical control machining tool heat error.This utility model belongs to precision processing technology and field of industrial automation control.
Background technology
Thermal Error is one of maximum error source of Digit Control Machine Tool, accounts for the 40%-70% of total error.Machine tool thermal error be due in lathe the effect of external heat source and make lathe building block generation thermal deformation cause, more accurate lathe, the ratio that Thermal Error accounts for total error is more big.Thermal Error not only makes the dimensional accuracy of product decline, and affects productivity ratio because of dimension overproof adjustment.Therefore, Thermal Error is effectively controlled most important to improving Digit Control Machine Tool machining accuracy.
The method of current adoptable reduction Thermal Error mainly has three kinds: the design of temperature field penalty method, heat stability and heat error compensation.Temperature field penalty method be by certain position arrange heating element heater or in some components flow circuit cooling oil, it is achieved heat compensation, with eliminate or reduce Thermal Error.The method is difficulty with the every Thermal Error in space is all effectively compensated.Heat stability design method is to meet the required precision of lathe by improving Machine Tool design, manufacture and assembly precision, and reliability is high, but there is significant limitation, and economic cost is often much more expensive.When machining accuracy is higher than after a certain degree, the cost that the method spends to improve machining accuracy is utilized exponentially to increase.Error compensation method is to analyze machine tool error source, sets up error model, and artificial manufacture makes new advances error to offset initial error.This method Meteorological is low, can be used for existing lathe, is especially difficult to carry out the aging lathe of structural adjustment, is greatly improved economic benefit.
Currently used heat error compensation technology is used mostly the bit shift compensation method of monitoring temperature, it is necessary to loads in digital control system and compensates signal input interface, by the control of systems soft ware, makes compensation signal transport to servo feed system via bus and does compensation motion.The method is disadvantageous in that servosystem itself has the error can not ignore, and the system of compensation is constrained in different digital control systems, poor universality.
For above-mentioned the deficiencies in the prior art, this utility model provides a kind of numerical control machine heat error compensation device, this device is external in platen, receive to compensate signal and produce microbit in-migration and compensate machine tool thermal error, do not restricted by digital control system and servosystem, it is possible to numerical control machining tool heat error is carried out real-Time Compensation.
Summary of the invention
The purpose of this utility model is to provide a kind of numerical control machine heat error compensation device, and this compensation device includes base (1), horizontal direction slide block, vertical direction slide block (8), vertical direction guide pad, horizontal direction slider-actuated element, vertical direction slider-actuated element；Horizontal direction slide block includes X-direction slide block (7) and Y-direction slide block (6), Y-direction slide block (6) is arranged on base (1), X-direction slide block (7) is arranged on Y-direction slide block (6), and X-direction slide block (7) and Y-direction slide block (6) are for offsetting the mismachining tolerance of the horizontal direction that Digit Control Machine Tool produces in the course of processing due to thermal deformation；Vertical direction slide block (8) is arranged on X-direction slide block (7), and vertical direction slide block (8) is for offsetting the mismachining tolerance of the vertical direction that Digit Control Machine Tool produces in the course of processing due to thermal deformation.
Described horizontal direction slide block, vertical direction slide block (8) are driven by horizontal direction slider-actuated element, vertical direction slider-actuated element and are controlled respectively.
Horizontal direction slider-actuated element includes the first stacked piezoelectric ceramic micro-displacement actuator (5), the 3rd stacked piezoelectric ceramic micro-displacement actuator (18), the 4th stacked piezoelectric ceramic micro-displacement actuator (23), the 5th stacked piezoelectric ceramic micro-displacement actuator (25)；Vertical direction slider-actuated element includes the second stacked piezoelectric ceramic micro-displacement actuator (12), the 6th stacked piezoelectric ceramic micro-displacement actuator (28), encapsulation type piezoelectric ceramic micro-displacement actuator (27).
The bottom of horizontal direction slide block is moved two ends, axis and is all had groove, the first stacked piezoelectric ceramic micro-displacement actuator (5) it is respectively fixed with in groove, 3rd stacked piezoelectric ceramic micro-displacement actuator (18), 4th stacked piezoelectric ceramic micro-displacement actuator (23), 5th stacked piezoelectric ceramic micro-displacement actuator (25), four pieces of piezoelectric ceramics are respectively by the first X-direction piezoelectric ceramics fixed block (4), first Y-direction piezoelectric ceramics fixed block (19), second X-direction piezoelectric ceramics fixed block (24), second Y-direction piezoelectric ceramics fixed block (26) is fixed, for driving horizontal direction slide block to move.
The bottom of vertical direction slide block (8) has four symmetrical channels, each in groove fixes one piece of encapsulation type piezoelectric ceramic micro-displacement actuator (27)；The top of vertical direction slide block (8) has two symmetrical channels, the second stacked piezoelectric ceramic micro-displacement actuator (12), the 6th stacked piezoelectric ceramic micro-displacement actuator (28) it is respectively fixed with in groove, two pieces of piezoelectric ceramics are fixed by the first vertical direction piezoelectric ceramics fixed block (13), the second vertical direction piezoelectric ceramics fixed block (15) respectively, in order to drive vertical direction slide block (8) mobile.
Y-direction slide block (6) is connected by first dovetail groove with base (1), Y-direction slide block (6) can in the upper slip of base (1), first dovetail groove side is provided with Y-direction slide block dovetail slot panel (20), adjust bolt (3) by the first Y-direction slide block dovetail slot gap on base (1), the second Y-direction slide block dovetail slot gap adjusts bolt (22) and adjusts Y-direction slide block dovetail slot panel (20), it is achieved the gap of first dovetail groove is adjusted；X-direction slide block (7) is connected by second dovetail groove with Y-direction slide block (6), X-direction slide block (7) can above slide by slide block (6) in the Y direction, second dovetail groove side is provided with X-direction slide block dovetail slot panel (21), adjust bolt (17) by two X-direction slide block dovetail slot gaps on Y-direction slide block (6) and adjust X-direction slide block dovetail slot panel (21), it is achieved the gap of second dovetail groove is adjusted；The top of X-direction slide block (7) and vertical direction slide block (8) opposite position have four symmetrical channels and four wire lead slots, for fixing encapsulation type piezoelectric ceramic micro-displacement actuator (27), the holding wire of encapsulation type piezoelectric ceramic micro-displacement actuator (27) is connected to outside numerical control machine heat error compensation device by piezoelectric ceramics wire lead slot (16).
Vertical direction guide pad (14) is fixed on X-direction slide block (7) top, vertical direction slide block (8) is connected by the 3rd dovetail groove with vertical direction guide pad (14), vertical direction slide block (8) can above slide by guide pad (14) in the vertical direction, 3rd dovetail groove side is provided with vertical direction slide block dovetail slot panel (10), adjust bolt (9) by a vertical direction slide block dovetail slot gap on vertical direction guide pad (14) and adjust vertical direction slide block dovetail slot panel (10), realize the gap of the 3rd dovetail groove is adjusted.
Base (1) two ends are provided with two boss, each boss has two U-lags (2) equal with platen T-slot spacing, for base (1) is fixed on numerically controlled machine, vertical direction slider top has equally distributed clamp-securing bore (11), described clamp-securing bore (11) is screwed hole, is threaded connection stationary fixture.
A kind of numerical control machine heat error compensation method, numerical control machine heat error compensation method is to gather Digit Control Machine Tool temperature sensitizing range temperature information by some temperature sensors, by incoming for temperature data computer and Thermal Error value and compensation dosage is forecast by bus, by A/D reforming unit, compensation dosage changed into different output voltages, by drive amplification device amplification voltage signal, it is used for driving piezoelectric ceramic micro-displacement actuator.
This utility model has the beneficial effect that
1, compensation device described in the utility model is external in platen, is not limited by servosystem and digital control system, and application conditions is simple, applied range.
2, compensation device described in the utility model can produce micro-displacement in three directions, compensates the error that thermal deformation of machine tool produces, is effectively improved machine finish.
3, the temperature data collected is input to computer by compensation method described in the utility model, computer recording temperature data also calculates compensation dosage automatically according to the Thermal Error model set up, amplify after compensation dosage is converted to voltage signal, the voltage signal amplified is utilized to control to drive element accordingly, it is achieved that Thermal Error real-time automatic compensation.
This utility model is applicable to the Digit Control Machine Tool with workbench, adopts different size according to the big I of processing work and workbench, can be selected for the piezoelectric ceramic micro-displacement actuator of different size according to thermal deformation of machine tool amount size, have good application prospect.
Accompanying drawing explanation
Fig. 1 is numerical control machine heat error compensation device installation diagram；
Fig. 2 is thermal error compensating device top view；
Fig. 3 is that thermal error compensating device faces part sectioned view A-A；
Fig. 4 is that part sectioned view B-B is looked on the thermal error compensating device right side；
Fig. 5 is thermal error compensating device work system schematic diagram.
In figure: 1, base, 2, base fixes U-lag, and 3, first Y-direction slide block dovetail slot gap adjusts bolt, and 4, first X-direction piezoelectric ceramics fixed block, 5, first stacked piezoelectric ceramic micro-displacement actuator, 6, Y-direction slide block, 7, X-direction slide block, 8, vertical direction slide block, 9, vertical direction slide block dovetail slot gap adjusts bolt, and 10, vertical direction slide block dovetail slot panel, 11, clamp-securing bore, 12, second stacked piezoelectric ceramic micro-displacement actuator, 13, first vertical direction piezoelectric ceramics fixed block, 14, vertical direction guide pad, 15, second vertical direction piezoelectric ceramics fixed block, 16, piezoelectric ceramics wire lead slot, 17, X-direction slide block dovetail slot gap adjusts bolt, and 18, 3rd stacked piezoelectric ceramic micro-displacement actuator, 19, first Y-direction piezoelectric ceramics fixed block, 20, Y-direction slide block dovetail slot panel, 21, X-direction slide block dovetail slot panel, 22, second Y-direction slide block dovetail slot gap adjusts bolt, and 23, 4th stacked piezoelectric ceramic micro-displacement actuator, 24, second X-direction piezoelectric ceramics fixed block, 25, 5th stacked piezoelectric ceramic micro-displacement actuator, 26, second Y-direction piezoelectric ceramics fixed block, 27, encapsulation type piezoelectric ceramic micro-displacement actuator, 28, 6th stacked piezoelectric ceramic micro-displacement actuator.
Detailed description of the invention
Below in conjunction with accompanying drawing, this utility model is further described.
Fig. 1 is the installation diagram of numerical control machine heat error compensation device, and this figure mainly illustrates the outward appearance of this device and each critical piece assembly relation.In figure, Y-direction slide block can carry out small slip on base, and X-direction slide block can carry out small slip on slide block in the Y direction, and vertical direction guide pad is bolted on X-direction slide block, and vertical direction slide block can carry out small slip along guide pad.Therefore, vertical direction slide block can at three direction motion micro-displacements simultaneously.
Fig. 2 is thermal error compensating device top view, and shown in figure, two step profile lines carry out biopsy cavity marker devices, it is possible to show this device internal structure further.Fig. 3 is that thermal error compensating device faces part sectioned view, and hatching is cross section A-A shown in Fig. 2.In figure, left side is visible, has two symmetrical channels in X-direction slide block bottom, and one piece of stacked piezoelectric ceramic micro-displacement actuator of each installation in groove, outside is fixed by piezoelectric ceramics respectively by piezoelectric ceramics fixed block.X-direction slide block can be driven along X-direction minute movement by both sides piezoelectric ceramics flexible.Fig. 4 is that part sectioned view is looked on the thermal error compensating device right side, and hatching is section B-B shown in Fig. 2.In Fig. 4, lower left quarter is visible, and slide block bottom has two symmetrical channels in the Y direction, and one piece of stacked piezoelectric ceramic micro-displacement actuator of each installation in groove, outside is fixed by piezoelectric ceramics respectively by piezoelectric ceramics fixed block.Y-direction slide block can be driven along Y direction minute movement by both sides piezoelectric ceramics flexible.
From Fig. 4 top, the top of slide block has two symmetrical channels in the vertical direction, and one piece of stacked piezoelectric ceramic micro-displacement actuator of each installation in groove, upside is fixed by piezoelectric ceramics respectively by piezoelectric ceramics fixed block.The bottom of slide block has four symmetrical channels in the vertical direction, has four grooves in the top of X-direction slide block correspondence with it, has four wire lead slots simultaneously, is communicated to outside device.Each in four grooves fixing one piece of encapsulation type piezoelectric ceramic micro-displacement actuator, its holding wire is drawn by wire lead slot.Flexible by upper and lower both sides piezoelectric ceramics can drive vertical direction slide block minute movement in vertical direction.
From section on the right side of Fig. 3, the side of base dovetail groove, equipped with one block of oblique panel of tack, panel has screw slots.Error-compensating apparatus can cause dovetail groove to wear and tear in using, and can be regulated the dovetail groove gap caused by abrasion by bolt.In error-compensating apparatus, all the other dovetail grooves regulate device with this place's device in like manner.
Fig. 5 is thermal error compensating device work system schematic diagram.Bed piece temperature sensitizing range can be found by Digit Control Machine Tool being carried out finite element analysis, arranging temperature sensor in temperature sensitizing range.Utilize the variations in temperature of data collecting card harvester bed tempertaure sensitizing range, by bus by incoming for temperature data computer.Computer Storage displays temperature data, and the Thermal Error value of lathe is gone out by the machine tool thermal error model prediction established, calculate heat error compensation amount.Utilize A/D conversion equipment that compensation dosage converts to different output voltages.Output voltage amplifies through drive amplification device, and piezoelectric ceramic micro-displacement actuator can be driven to realize stretching motion.Being arranged on platen by error-compensating apparatus, fixture is arranged on error-compensating apparatus vertical direction slide block.
The above detailed description of the invention is used for illustrating this utility model, rather than this utility model is limited.In design philosophy of the present utility model and scope of the claims, this utility model is made any amendment or change, is regarded as protection domain of the present utility model.
Claims (5)
1. a numerical control machine heat error compensation device, it is characterised in that: this compensation device includes base (1), horizontal direction slide block, vertical direction slide block (8), vertical direction guide pad, horizontal direction slider-actuated element, vertical direction slider-actuated element；Horizontal direction slide block includes X-direction slide block (7) and Y-direction slide block (6), and Y-direction slide block (6) is arranged on base (1), and X-direction slide block (7) is arranged on Y-direction slide block (6)；Vertical direction slide block (8) is arranged on X-direction slide block (7)；
Described horizontal direction slide block, vertical direction slide block (8) are driven by horizontal direction slider-actuated element, vertical direction slider-actuated element and are controlled respectively；Horizontal direction slider-actuated element includes the first stacked piezoelectric ceramic micro-displacement actuator (5), the 3rd stacked piezoelectric ceramic micro-displacement actuator (18), the 4th stacked piezoelectric ceramic micro-displacement actuator (23), the 5th stacked piezoelectric ceramic micro-displacement actuator (25)；Vertical direction slider-actuated element includes the second stacked piezoelectric ceramic micro-displacement actuator (12), the 6th stacked piezoelectric ceramic micro-displacement actuator (28), encapsulation type piezoelectric ceramic micro-displacement actuator (27)；
The bottom of horizontal direction slide block is moved two ends, axis and is all had groove, the first stacked piezoelectric ceramic micro-displacement actuator (5) it is respectively fixed with in groove, 3rd stacked piezoelectric ceramic micro-displacement actuator (18), 4th stacked piezoelectric ceramic micro-displacement actuator (23), 5th stacked piezoelectric ceramic micro-displacement actuator (25), four pieces of piezoelectric ceramics are respectively by the first X-direction piezoelectric ceramics fixed block (4), first Y-direction piezoelectric ceramics fixed block (19), second X-direction piezoelectric ceramics fixed block (24), second Y-direction piezoelectric ceramics fixed block (26) is fixed.
2. a kind of numerical control machine heat error compensation device according to claim 1, it is characterised in that: the bottom of vertical direction slide block (8) has four symmetrical channels, each in groove fixes one piece of encapsulation type piezoelectric ceramic micro-displacement actuator (27)；The top of vertical direction slide block (8) has two symmetrical channels, being respectively fixed with the second stacked piezoelectric ceramic micro-displacement actuator (12), the 6th stacked piezoelectric ceramic micro-displacement actuator (28) in groove, two pieces of piezoelectric ceramics are fixed by the first vertical direction piezoelectric ceramics fixed block (13), the second vertical direction piezoelectric ceramics fixed block (15) respectively.
3. a kind of numerical control machine heat error compensation device according to claim 1, it is characterized in that: Y-direction slide block (6) is connected by first dovetail groove with base (1), Y-direction slide block (6) can in the upper slip of base (1), first dovetail groove side is provided with Y-direction slide block dovetail slot panel (20), adjusts bolt (3), the second Y-direction slide block dovetail slot gap adjustment bolt (22) adjustment Y-direction slide block dovetail slot panel (20) by the first Y-direction slide block dovetail slot gap on base (1)；X-direction slide block (7) is connected by second dovetail groove with Y-direction slide block (6), X-direction slide block (7) can above slide by slide block (6) in the Y direction, second dovetail groove side is provided with X-direction slide block dovetail slot panel (21), adjusts bolt (17) by two X-direction slide block dovetail slot gaps on Y-direction slide block (6) and adjusts X-direction slide block dovetail slot panel (21)；The top of X-direction slide block (7) and vertical direction slide block (8) opposite position have four symmetrical channels and four wire lead slots, and the holding wire of encapsulation type piezoelectric ceramic micro-displacement actuator (27) is connected to outside numerical control machine heat error compensation device by piezoelectric ceramics wire lead slot (16).
4. a kind of numerical control machine heat error compensation device according to claim 1, it is characterized in that: vertical direction guide pad (14) is fixed on X-direction slide block (7) top, vertical direction slide block (8) is connected by the 3rd dovetail groove with vertical direction guide pad (14), vertical direction slide block (8) can above slide by guide pad (14) in the vertical direction, 3rd dovetail groove side is provided with vertical direction slide block dovetail slot panel (10), adjust bolt (9) by a vertical direction slide block dovetail slot gap on vertical direction guide pad (14) and adjust vertical direction slide block dovetail slot panel (10).
5. a kind of numerical control machine heat error compensation device according to claim 1, it is characterized in that: base (1) two ends are provided with two boss, each boss has two U-lags (2) equal with platen T-slot spacing, for base (1) is fixed on numerically controlled machine, vertical direction slider top has equally distributed clamp-securing bore (11), described clamp-securing bore (11) is screwed hole, is threaded connection stationary fixture.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520924248.7U CN205353734U (en) | 2015-11-19 | 2015-11-19 | Hot error compensation device of digit control machine tool |
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| CN201520924248.7U CN205353734U (en) | 2015-11-19 | 2015-11-19 | Hot error compensation device of digit control machine tool |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105278458A (en) * | 2015-11-19 | 2016-01-27 | 北京工业大学 | A numerical control machine tool thermal error compensation device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105278458A (en) * | 2015-11-19 | 2016-01-27 | 北京工业大学 | A numerical control machine tool thermal error compensation device and method |
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