CN106041633A - Active control method suitable for machine tool structure thermal deformation - Google Patents
Active control method suitable for machine tool structure thermal deformation Download PDFInfo
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- CN106041633A CN106041633A CN201510990919.4A CN201510990919A CN106041633A CN 106041633 A CN106041633 A CN 106041633A CN 201510990919 A CN201510990919 A CN 201510990919A CN 106041633 A CN106041633 A CN 106041633A
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- machine tool
- temperature
- tool structure
- control method
- active control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/12—Arrangements for cooling or lubricating parts of the machine
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/0003—Arrangements for preventing undesired thermal effects on tools or parts of the machine
- B23Q11/0007—Arrangements for preventing undesired thermal effects on tools or parts of the machine by compensating occurring thermal dilations
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automatic Control Of Machine Tools (AREA)
Abstract
The invention discloses an active control method suitable for machine tool structure thermal deformation. The active control method comprises the three parts that thermal characteristic simulation is conducted on a machine tool structural part, a heat reactive control point of the machine tool structural part is analyzed, and an active control method for thermal characteristics of the machine tool structural part is designed. According to a thermal characteristic simulation method for the machine tool structural part, before thermal characteristic finite element simulation is conducted on the machine tool structural part, a CAD model needs to be established, and model simplification is conducted. The simplified model is then guided into an ANSYS for grid division, load applying and simulation calculation. According to the active control method, through analysis and design, the cooling efficiency and the installation position of an active temperature control device are determined so as to achieve active control over thermal deformation of the machine tool structural part. The defects of prior related research results are overcome, the reliability is high, and application is convenient.
Description
Technical field
This patent relates to Digit Control Machine Tool processing technique field, a kind of active control being applicable to machine tool structure thermal deformation
Method processed.
Background technology
The workpiece accuracy of machine tooling be usually machine tool accuracy value about 1.5-2 times (consider technological capacity coefficient general
About 1.33), such as plain edition machine tool position precision is 0.025mm, processes workpiece dimension precision between the holes left at 0.04-0.05mm
The right side, this allows for the deformation of process system, the impact of processing temperature field, uneven, the tool precision impact of workpiece material etc., wherein
Lathe variations in temperature is one of key factor affecting machining accuracy.Any lathe is processed consuming power, produces heat
Amount, heat is transmitted to each moving component of lathe and machine element, necessarily causes the thermal deformation of lathe worker process system, cause workpiece
The change of machining accuracy.Such as, a conventional numerical control vertical milling machine, when lathe is proceeded to hot by cold conditions, main shaft is when long
Between after high-speed motion, temperature likely rises ten several years, together machine element temperature rise, in the layback of column local thermal deformation, main shaft
The comprehensive deformations such as the extension of heart line, main shaft end face new line, the end mill of centering small dimension, main shaft end face is likely to be breached 0.02-
The length change of 0.02mm.On Digit Control Machine Tool main heating source derive from each servomotor and spindle motor, high-speed moving part and
Hydraulic system etc..The circulation fluid type of cooling, as a kind of effective ways controlling thermal deformation of machine tool, has been widely used in each
Class is accurate and in the manufacturing and designing of ultra-precision machine tool.At present, the circulation fluid type of cooling typically uses circulating pump to make through supercooling dress
The coolant putting cooling enters the heating mechanism of machine tool body, and takes away heat, is back in chiller, completes cooling and follow
Ring, thus reduce the temperature of lathe heat generating components, it is achieved circulation fluid temperature controls, but its circulation fluid temperature is single, cooling path
Fixing, it is impossible to the differentiation realizing machine tool structure part temperature field controls.
Summary of the invention
The present invention solves that technical problem present in known technology provides one to can be suitably used for machine tool structure part heat and becomes
The Active Control Method of shape temperature control.
The present invention solves that technical problem is adopted the technical scheme that present in known technology: a set of layering is independent the most
Point megadyne temperature Ore-controlling Role, one group of master control attemperating unit and coolant.
A kind of Active Control Method being applicable to machine tool structure thermal deformation, it is characterised in that can be divided into machine tool structure part
Carry out thermal characteristic emulation, analyze the thermo-responsive control point of machine tool structure part, design machine tool structure part thermal characteristic actively controlling party
Three parts of method；
Described cooling recirculation system exportable different temperatures coolant, often organizes described blood circulation and includes a cooling circulation
Machine and a circulating pump, described cooling cycle machine is provided with coolant output temperature detection device and liquid level detection device, Qi Zhongyi
Bar cooling circulation main line is that high temperature cooling circulates main line, including that output coolant temperature scope is 5～35 degrees Celsius
One cooling cycle machine and the first circulating pump；Another set coolant circulation main line is that sub-cooled circulates main line, including one
Output coolant temperature scope is the second cooling cycle machine and second circulating pump of 5～35 degrees Celsius；Often group cooling circulation
Road includes that an independent temperature case uses PID control model, can control the coolant inlet temperature of each attemperating unit respectively；Institute
State temperature-detecting device and respectively outlet temperature sensing is set in coolant inlet inlet porting temperature sensor and cooling liquid outlet
Device, described inlet temperature sensor is all connected with PC with outlet temperature sensor, uses LABVIEW collecting temperature signal, real
Time detect entrance coolant temperature.
Before carrying out machine tool structure part thermal characteristic finite element simulation, need to set up cad model, and carry out model letter
Changing, the model simplified imports grid division in ANSYS, imposed load again, carries out simulation calculation.
Based on being layered independent Multipoint temperature-control device, for precise numerical control machine structural member typical heat step response, from thermal balance
Angle is set out, and by the Finite Element Simulation Analysis to Machine Tool Feeding System thermal characteristics, designs a set of precision machine tool that is applicable to and ties
The thermo-responsive control point bit optimization method of component.
Consider the impact on machine tool structure part thermal characteristic of the active temperature control plate, select corresponding hot performance to evaluate letter
Number, as the object function of optimization problem, has carried out multiple-objection optimization to the parameter of the active temperature control plate of this machine tool structure part,
Arrive optimal strategy, finally by Finite Element Simulation Analysis, demonstrate the effectiveness of optimum results.
The present invention has the advantage that with good effect: by arranging coolant inlet temperature and the flow of attemperating unit,
Carry out the cooling effectiveness of each attemperating unit of independent regulation, and according to the position of the simulation result each attemperating unit of regulation, to realize
The active of machine tool structure part thermal deformation controls.Compensate for the defect of conventional correlational study achievement, reliability is high, and application is convenient.
Accompanying drawing explanation
Fig. 1 is the grid chart of machine tool structure part of the present invention；
Fig. 2 is the basic outline drawing of machine tool structure part of the present invention；
Fig. 3 is the thermal deformation analogous diagram of machine tool structure part of the present invention；
Fig. 4 is the master control attemperating unit of the present invention installation site schematic diagram on machine tool structure part.
Detailed description of the invention
For the summary of the invention of the present invention, feature and effect can be further appreciated that, hereby enumerate following example, and coordinate accompanying drawing
Describe in detail as follows:
Refer to Fig. 1 to Fig. 3, a kind of Active Control Method for machine tool structure part thermal deformation, described in be applicable to lathe
Temperature field differential control free installing type attemperating unit, including a cooling recirculation system, one group can on lathe from
By the device mounted and dismounted, a set of Insulation and the heat-conducting plate of a high thermal conductivity coefficient.Described cooling recirculation system can be defeated
Going out different temperatures coolant, often organize described blood circulation and include a cooling cycle machine and a circulating pump, described cooling circulates
Machine is provided with coolant output temperature detection device and liquid level detection device, and wherein a cooling circulation main line is high temperature cooling circulation
Main line, exports, including one, the first cooling cycle machine and the first circulating pump that coolant temperature scope is 5～35 degrees Celsius；Separately
Outer one group of coolant circulation main line is that sub-cooled circulates main line, is 5～35 Celsius including output coolant temperature scope
Second cooling cycle machine of degree and the second circulating pump；Often group cooling circulation branch road includes that an independent temperature case uses PID control
Molding formula, can control the coolant inlet temperature of each attemperating unit respectively；
Described temperature machine tool structure part thermal characteristic emulation mode, carry out machine tool structure part thermal characteristic finite element simulation it
Before, needing to set up cad model, and carry out model simplification (remove chamfering, remove screwed hole etc.), the model simplified imports again
Grid division, imposed load in ANSYS, carry out simulation calculation；
Method is analyzed at the described thermo-responsive control point of machine tool structure part, based on being layered independent Multipoint temperature-control device, for precision
Structure of numerically controlled machine-tool part typical heat step response, from heat balance point, by the finite element to Machine Tool Feeding System thermal characteristics
Simulation analysis, designs a set of thermo-responsive control point bit optimization method being applicable to precision machine tool structural member；
Described lathe thermal characteristic Active Control Method, considers active temperature control plate to machine tool structure part thermal characteristic
Impact, selects corresponding hot performance evaluation function as the object function of optimization problem, the active temperature to this machine tool structure part
The parameter of control plate has carried out multiple-objection optimization, has obtained optimal strategy.Finally by Finite Element Simulation Analysis, demonstrate optimization knot
The effectiveness of fruit.
The present invention actively controls can comprise the following steps that for realizing machine tool structure part thermal deformation
1. pair machine tool structure part carries out thermal characteristic emulation；
2. analyze the thermo-responsive control point of machine tool structure part；
3. analyzing the size of master control temperature control plate, inlet temperature and position etc. with iSIGHT, design machine tool structure part is hot
Characteristic Active Control Method.
Although the preferred embodiments of the present invention being described above in conjunction with accompanying drawing, but the invention is not limited in
The detailed description of the invention stated, above-mentioned detailed description of the invention is only schematically, is not restrictive, this area common
Technical staff, under the enlightenment of the present invention, in the case of without departing from present inventive concept and scope of the claimed protection, also may be used
To make a lot of form, within these belong to protection scope of the present invention.
Claims (4)
1. the Active Control Method being applicable to machine tool structure thermal deformation, it is characterised in that can be divided into and machine tool structure part is entered
The emulation of row thermal characteristic, the analysis thermo-responsive control point of machine tool structure part, design machine tool structure part thermal characteristic Active Control Method
Three parts；
Described cooling recirculation system exportable different temperatures coolant, often organize described blood circulation include a cooling cycle machine and
One circulating pump, described cooling cycle machine is provided with coolant output temperature detection device and liquid level detection device, wherein one cold
But circulation main line is that high temperature cooling circulates main line, is 5～35 degrees Celsius first cold including output coolant temperature scope
But circulator and the first circulating pump；Another set coolant circulation main line is that sub-cooled circulates main line, including an output
Coolant temperature scope is the second cooling cycle machine and second circulating pump of 5～35 degrees Celsius；Often group cooling circulation branch road bag
Include an independent temperature case and use PID control model, the coolant inlet temperature of each attemperating unit can be controlled respectively；Described temperature
Degree detection device arranges outlet temperature sensor in coolant inlet inlet porting temperature sensor and cooling liquid outlet respectively, institute
State inlet temperature sensor to be all connected with PC with outlet temperature sensor, use LABVIEW collecting temperature signal, monitor in real time
Gateway coolant temperature.
A kind of Active Control Method being applicable to machine tool structure thermal deformation the most according to claim 1, it is characterised in that
Before carrying out machine tool structure part thermal characteristic finite element simulation, need to set up cad model, and carry out model simplification, simplified
Model imports grid division in ANSYS, imposed load again, carries out simulation calculation.
A kind of Active Control Method being applicable to machine tool structure thermal deformation the most according to claim 1, it is characterised in that base
In being layered independent Multipoint temperature-control device, for precise numerical control machine structural member typical heat step response, from heat balance point, logical
Cross the Finite Element Simulation Analysis to Machine Tool Feeding System thermal characteristics, design and a set of be applicable to the thermo-responsive of precision machine tool structural member
Control point bit optimization method.
A kind of Active Control Method being applicable to machine tool structure thermal deformation the most according to claim 1, it is characterised in that combine
Close and consider the impact on machine tool structure part thermal characteristic of the active temperature control plate, select corresponding hot performance evaluation function as optimization
The object function of problem, has carried out multiple-objection optimization to the parameter of the active temperature control plate of this machine tool structure part, has obtained optimum plan
Slightly, finally by Finite Element Simulation Analysis, the effectiveness of optimum results is demonstrated.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510990919.4A CN106041633A (en) | 2015-12-25 | 2015-12-25 | Active control method suitable for machine tool structure thermal deformation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510990919.4A CN106041633A (en) | 2015-12-25 | 2015-12-25 | Active control method suitable for machine tool structure thermal deformation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108214087A (en) * | 2016-12-22 | 2018-06-29 | 大隈株式会社 | The temperature estimation method of lathe and thermal displacement correction method |
-
2015
- 2015-12-25 CN CN201510990919.4A patent/CN106041633A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108214087A (en) * | 2016-12-22 | 2018-06-29 | 大隈株式会社 | The temperature estimation method of lathe and thermal displacement correction method |
| CN108214087B (en) * | 2016-12-22 | 2021-06-15 | 大隈株式会社 | Temperature estimation method and thermal displacement correction method for machine tool |
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