CN210499488U - Device for improving temperature control precision of electric spindle cooling equipment of numerical control machine tool - Google Patents
Device for improving temperature control precision of electric spindle cooling equipment of numerical control machine tool Download PDFInfo
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- CN210499488U CN210499488U CN201821637366.XU CN201821637366U CN210499488U CN 210499488 U CN210499488 U CN 210499488U CN 201821637366 U CN201821637366 U CN 201821637366U CN 210499488 U CN210499488 U CN 210499488U
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Abstract
The utility model discloses a device for improving digit control machine tool electricity main shaft cooling arrangement accuse temperature precision, set up the heater through between the liquid outlet at cooling arrangement and digit control machine tool electricity main shaft, then set up temperature sensor respectively in the entry and the exit of heater, thereby can be according to the difference change of coolant temperature and setting value, control through the heating to the heater, realize the temperature control to the higher accuracy of coolant liquid, thereby can carry out the temperature control of high accuracy to the electricity main shaft, it is too big to avoid the change of electricity main shaft temperature difference, greatly reduced electricity main shaft's thermal elongation value, be favorable to improving the machining precision of lathe.
Description
Technical Field
The utility model relates to a digit control machine tool electricity main shaft cooling technology field especially relates to digit control machine tool electricity main shaft cooling arrangement.
Background
In the process of machining a numerical control machine tool, because the electric spindle integrates a motor into the spindle unit and has high rotating speed, a large amount of heat is generated inside along with the lengthening of the running time of the electric spindle, so that the thermal state characteristic and the dynamic characteristic of the electric spindle are poor, the normal work of the electric spindle is influenced, the thermal elongation value of the electric spindle is unstable, and the machining precision cannot be effectively guaranteed, therefore, certain measures must be taken to control the temperature of the electric spindle, and the temperature is kept constant within a certain temperature value so as to ensure the machining precision of a workpiece. At present, a machine tool generally cools a stator and a spindle bearing of an electric spindle by adopting a forced circulation cooling liquid (usually oil or water) cooling mode, namely, the cooling liquid of cooling equipment forcibly circulates the outside of the spindle stator and the outside of the spindle bearing to take away heat generated by high-speed rotation of the spindle. The temperature control precision of the cooling equipment commonly used at present is only about 0.5 ℃, so that the increasingly-improved high-precision temperature control requirement for processing cannot be met. The working process principle of the existing cooling equipment is as follows: the heat of the cooling liquid is absorbed by the compressed refrigerant (freon) in the evaporator and vaporized into steam, the generated steam is continuously extracted from the evaporator by the compressor and compressed, the compressed high-temperature and high-pressure steam is sent to the condenser and then releases heat to the cooling medium (such as water, air and the like) to be condensed into high-pressure liquid, and then the high-temperature and high-pressure steam enters the evaporator after being throttled and depressurized by the throttle valve and is vaporized again to absorb the heat of the cooling liquid, and the cycle is repeated. Because of utilizing high, low differential pressure reason, it is difficult accurate control temperature, moreover because refrigeration inertia, when the compressor stops working, the temperature of coolant liquid still can continue to descend under refrigeration inertia effect, makes coolant liquid temperature deviate from the temperature that sets up, and temperature control precision is poor.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides a device for improving the temperature control precision of the electric spindle cooling equipment of the numerical control machine.
In order to achieve the above object, an embodiment of the present invention adopts the following technical solutions: the utility model provides a device for improving digit control machine tool electricity main shaft cooling arrangement accuse temperature precision, is including setting up the heater between the liquid outlet of cooling arrangement and digit control machine tool electricity main shaft, the heater connection has the controller, and the heater both ends are provided with entry and the export that is used for the coolant liquid to advance respectively, and entry and export are connected with entry temperature sensor and export temperature sensor respectively, entry temperature sensor and export temperature sensor all are connected with the controller.
As a further improvement of the scheme, the heater is provided with multi-gear heating power.
Further, the heater is an electric heater.
Further, the heater is a PTC electric heater.
Further, the cooling equipment is oil cooling equipment or water cooling equipment.
The utility model has the advantages that:
the utility model discloses a device for improving digit control machine tool electricity main shaft cooling arrangement accuse temperature precision, through set up the heater between the liquid outlet at cooling arrangement and digit control machine tool electricity main shaft, then set up temperature sensor respectively in the entry and the exit of heater, thereby can change with the difference of setting value according to the coolant temperature, control through the heating to the heater, realize the temperature control to the higher accuracy of coolant liquid, thereby can carry out the temperature control of high accuracy to the electricity main shaft, it is too big to avoid the change of electricity main shaft temperature difference, greatly reduced electricity main shaft's thermal elongation value, be favorable to improving the machining precision of lathe.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention.
Referring to fig. 1, an embodiment of the utility model, a device for improving digit control machine tool electricity main shaft cooling arrangement accuse temperature precision, through set up heater 2 between the liquid outlet 11 at cooling arrangement 1 and digit control machine tool electricity main shaft 3, cooling arrangement 1 can be oil cooling equipment or water-cooling equipment or adopt the cooling arrangement 1 of other coolants, and heater 2 is preferred electric heater to squareJust, start control, electric heater especially PTC electric heater, it heats effectually soon, has more models on the market and can specifically select as required, certainly also can be other types of heater, and 2 both ends of heater are provided with entry and export that are used for the coolant liquid to advance respectively, and entry and export are connected with entry temperature sensor 4 and export temperature sensor 5 respectively, entry temperature sensor 4 and export temperature sensor 5 all are connected with the controller that heater 2 is connected, and the temperature value that entry temperature sensor 4 detected is T1The temperature value detected by the outlet temperature sensor 5 is T2The temperature value set by the controller is T3，X＝(T1-T3)-(T3-T2) When the cooling device 1 works, when the controller detects that X is more than or equal to 0, the heater 2 does not heat, and when the controller detects that X is less than 0, the controller controls the heater 2 to start to heat, so that the temperature of the cooling liquid output from the outlet of the heater 2 is enabled to be equal to the set temperature value T3And the temperature control precision of the cooling equipment is improved.
Preferably, the heater 2 is provided with multi-step heating power, when X is less than 0, the controller controls the heating power step used by the heater 2 for heating according to the absolute value of X, the smaller the absolute value of X is, the smaller the heating power step used by the heater 2 for heating is, and the larger the absolute value of X is, the larger the heating power step used by the heater 2 for heating is. The more heating power steps are set, the higher the accuracy of the temperature control. For example, the temperature of the cooling liquid at the liquid outlet 11 of the cooling device 1 is 23.5 ℃ ± 0.5 ℃, when X is-0.01 ℃, the controller controls the heating power gear of the heater 2 to be relatively small, and the output power of the heating power gear is 2% of the rated power; when X is-0.02 ℃, the controller controls the heating power gear of the heater 2 to be smaller, the output power of the heating power gear is 4% of the rated power, and so on, when X is-0.50 ℃, the output power of the corresponding heating power gear is 100% of the rated power, that is, when the difference between the temperature of the cooling liquid and the set value is larger, the heating power of the heater 2 is larger, and the difference between the temperature of the cooling liquid and the set value is smaller, the heating power of the heater 2 is smaller, so that the cooling liquid can be heated to the set value in the period of time passing through the heater 2, the cooling liquid can keep a relatively stable flow, meanwhile, the constant temperature control can be realized, the flow is prevented from being reduced when the temperature difference between the cooling liquid and the set value is larger, and the cooling liquid with a stable and sufficient flow can be conveyed to the electric spindle for cooling by the cooling device 1, thereby more accurate constant temperature control can be realized.
The following is one example of an experiment carried out by the applicant using the method of the present invention:
the power of an electric spindle of the numerical control machine tool for the test is 4kw, the rotating speed is 6000-. The experimental result shows that the heater 2 is added at the liquid outlet 11 of the cooling device 1, and the output cooling liquid can be well kept within 24 +/-0.02 ℃ after the heating time of the heater 2 is controlled, so that the aim of high-precision temperature control is fulfilled.
While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited thereto, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (5)
1. The utility model provides a device for improving digit control machine tool electricity main shaft cooling arrangement accuse temperature precision which characterized in that: including setting up heater (2) between liquid outlet (11) of cooling arrangement (1) and digit control machine tool electricity main shaft (3), heater (2) are connected with the controller, and heater (2) both ends are provided with entry and the export that is used for the coolant liquid to advance respectively, and entry and export are connected with entry temperature sensor (4) and export temperature sensor (5) respectively, entry temperature sensor (4) and export temperature sensor (5) all are connected with the controller.
2. The device for improving the temperature control precision of the electric spindle cooling equipment of the numerical control machine according to claim 1, characterized in that: the heater (2) is provided with multi-gear heating power.
3. The device for improving the temperature control precision of the electric spindle cooling equipment of the numerical control machine according to claim 1 or 2, characterized in that: the heater (2) is an electric heater.
4. The apparatus for improving the temperature control accuracy of electric spindle cooling equipment of numerical control machine according to claim 3, wherein: the heater (2) is a PTC electric heater.
5. The device for improving the temperature control precision of the electric spindle cooling equipment of the numerical control machine according to claim 1 or 2, characterized in that: the cooling equipment (1) is oil cooling equipment or water cooling equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821637366.XU CN210499488U (en) | 2018-10-09 | 2018-10-09 | Device for improving temperature control precision of electric spindle cooling equipment of numerical control machine tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821637366.XU CN210499488U (en) | 2018-10-09 | 2018-10-09 | Device for improving temperature control precision of electric spindle cooling equipment of numerical control machine tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210499488U true CN210499488U (en) | 2020-05-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821637366.XU Active CN210499488U (en) | 2018-10-09 | 2018-10-09 | Device for improving temperature control precision of electric spindle cooling equipment of numerical control machine tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210499488U (en) |
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2018
- 2018-10-09 CN CN201821637366.XU patent/CN210499488U/en active Active
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