CN212572457U - High-precision numerical control horizontal coordinate boring servo motor temperature active control device - Google Patents
High-precision numerical control horizontal coordinate boring servo motor temperature active control device Download PDFInfo
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- CN212572457U CN212572457U CN202021527323.3U CN202021527323U CN212572457U CN 212572457 U CN212572457 U CN 212572457U CN 202021527323 U CN202021527323 U CN 202021527323U CN 212572457 U CN212572457 U CN 212572457U
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Abstract
High accuracy numerical control horizontal coordinate boring servo motor temperature active control device, including the servo motor body, the servo motor body outside is provided with the adjustable installing support, is provided with the control proportional valve on the adjustable installing support, and the control proportional valve sets up in cooling gas circuit total exit, and annular gas circuit is connected at control proportional valve rear portion for form redundant formula cooling line, the adjustable installing support on be provided with the adjustable mouth of blowing, the rear end that the mouth was blown in the direction adjustable connects gas flow monitoring element, gas flow monitoring element is used for detecting each cooling mouth actual gas flow, gas flow monitoring element passes through pipe connection to total annular gas circuit, cooling gas is exported to annular gas circuit through the control proportional valve, the direction can be debugged the mouth of blowing and carry out overlay type cooling to the servo motor body.
Description
Technical Field
The utility model relates to a high accuracy numerical control horizontal coordinate boring machine technical field, in particular to high accuracy numerical control horizontal coordinate boring servo motor temperature active control device.
Background
The high-precision numerical control horizontal coordinate boring machine has extremely strict requirements on the temperature of the using environment, the environment temperature field, the temperature of the rotating heating component of the machine tool and the temperature rising speed. If the ambient temperature, the ambient temperature field and the temperature of the rotating heating component of the machine tool greatly disturb or continuously change, the actual use performance of the machine tool is greatly influenced, the comprehensive cutting precision of the machine tool is finally influenced, and the position degree of the processed workpiece can be seriously deviated to cause the rejection of the workpiece.
The use environment of the traditional high-precision numerical control horizontal coordinate boring machine is a constant-temperature workshop, and the fluctuation of an external temperature field has little influence on the performance of the machine tool due to the strict control of the external environment temperature and the temperature field. Meanwhile, the machine tool body is also independently provided with a plurality of temperature control systems of rotating heating components, for example, a feed shaft screw is configured as a central water-cooling screw, a screw seat and a bearing are configured with a water-cooling device, and a main shaft is configured with a circulating oil cooling or water-cooling system, so that the heat generated by each rotating heating component of the machine tool in the motion process is strictly controlled. And a passive temperature compensation device is also configured for each feed shaft and is used for compensating coordinate drift caused by temperature and temperature field changes, so that the positioning and repeated positioning precision of the machine tool is ensured. However, in various temperature control methods, the heat generated by the servo motors of the feed shaft and the main shaft in the use process is not effectively and actively controlled, and the influence of the heat generated in the operation process on the performance of the machine tool is released, so that the influence of the heat on the machine tool needs to be effectively reduced and finally eliminated by closed-loop control.
Disclosure of Invention
In order to overcome the not enough of above-mentioned prior art, the utility model aims to provide a high accuracy numerical control horizontal coordinate boring servo motor temperature active control device, the servo motor temperature that will be under different states carries out the temperature fusion according to different control methods and ambient temperature to merge microcosmic annular temperature field around the servo motor with higher speed, the temperature rise volume and the temperature rise speed of final control motor reduce the lathe heat altered shape that arouses because of the motor temperature rise by a wide margin, thereby guarantee the machining precision of lathe.
In order to realize the purpose, the utility model discloses a technical scheme is:
the high-precision numerical control horizontal coordinate boring servo motor temperature active control device comprises a servo motor body 1, an adjustable mounting bracket 2 is arranged on the outer side of the servo motor body 1, a control proportional valve 3 is arranged on the adjustable mounting bracket 2, the control proportional valve 3 is arranged at the main outlet of the cooling gas path, the rear part of the control proportional valve 3 is connected with an annular gas path 4, used for forming a redundant cooling pipeline, an adjustable air blowing opening 6 is arranged on the adjustable mounting bracket 2, can debug the rear end of blowing mouth 6 and connect gas flow monitoring component 5, gas flow monitoring component 5 is used for detecting the actual airflow of each cooling port, and gas flow monitoring component 5 passes through pipe connection to total annular gas circuit 4, and cooling gas flows exports annular gas circuit 4 through control proportional valve 3, can debug blowing mouth 6 and carry out the cover formula cooling to servo motor body 1.
The adjustable mounting bracket 2 is L-shaped, is provided with four and is fixedly mounted on the servo motor body 1 through adjustable bolts and nuts.
The corners of the four L-shaped adjustable mounting brackets 2 are respectively provided with four adjustable air blowing openings 6.
The active temperature control method for the high-precision numerical control horizontal coordinate boring servo motor comprises the following steps;
when a machine tool is powered on, the servo motor body 1 transmits the actual temperature value of the servo motor body 1 to a driving module through a motor control cable, the data is stored in numerical control system driving parameters R35, secondary development system parameters are connected with a data energy block, a PLC program function block is called to read the data through an NC driving bus and store the data into a PLC data area, and the environmental temperature of the microscopic temperature field at the position of the servo motor body 1 is input into an analog quantity input module through an analog quantity signal cable through a motor room temperature monitoring sensor arranged near the servo motor body 1; at the moment, the PLC program analyzes and judges the collected motor temperature and room temperature data;
if the temperature of the servo motor body 1 is lower than the room temperature at the moment, whether the temperature of the servo motor body 1 is lower than the room temperature by 2 ℃ is judged again, if the temperature of the servo motor body 1 is lower than the room temperature by 2 ℃, the PLC program is used for calculating, the analog quantity output module is controlled by the control bus to send out control voltage corresponding to the program, the control proportional valve 3 is controlled by the analog quantity control cable to be in a non-connection or closed state, so that no cooling air flow circulates in the annular air passage 4, and no cooling air flow is output when the control proportional valve is connected to the adjustable air blowing port 6 arranged on the adjustable mounting; if the temperature of the servo motor body 1 is lower than the room temperature but not lower than the room temperature by 2 ℃, the PLC program controls the output of a set minimum cooling capacity voltage value through the analog output module 1, controls the control proportional valve 3 to be in a set minimum cooling opening state through an analog control cable, is connected to an adjustable air blowing port 6 arranged on the adjustable mounting bracket 2 through an annular air passage 4, and does not output cooling air flow for continuous pre-cooling, if the temperature of the servo motor body 1 is higher than the room temperature, whether the temperature of the motor is higher than the room temperature by 2 ℃ is judged again, and if the temperature of the servo motor body 1 is not higher than the room temperature by 2 ℃, the PLC program uses a PID control mode to adjust the output voltage of the control proportional valve 3 in real time, and finally controls the cooling flow of the adjustable air blowing port 6; if the temperature of the servo motor body 1 is higher than the room temperature by 2 ℃, the PLC program can control the proportional control valve 3 to be completely opened, the motor is forcibly cooled by using strong cooling airflow, and the temperature of the motor is reduced to a controllable range in a short time.
The utility model has the advantages that:
the servo motor temperature active control device combines the combined action of traditional screw rod cooling, bearing cooling and passive temperature compensation, and can guarantee the precision of the high-precision horizontal numerical control coordinate boring machine in an all-round manner. The system is a system integration technology combining mechanical design, electrical control and pneumatic control. The control method is different from the control mode of compensating the variable quantity after the temperature of the traditional release motor rises, the temperature rise quantity and the temperature rise speed of the motor can be clamped under the active control of the temperature of the servo motor, the temperature is preprocessed in advance, meanwhile, the micro temperature field is accelerated to reach balance through the disturbance of cooling air flow in the environment where each feed shaft and the spindle motor of the machine tool are installed, and the influence caused by the temperature rise of the motor is relieved fundamentally.
The servo motor temperature active control device is popularized and applied in a plurality of high-precision numerical control horizontal coordinate boring series products such as TGK46 series, THM46 series, TGK65 series and the like of the company, the usability of a machine tool is improved, and good social and economic benefits are obtained. Meanwhile, the cooling control mode can be popularized and applied to the cooling of the screw rod and the bearing, and the traditional cooling mode is replaced. However, because the servo motor temperature active control device uses a large number of analog quantity signals and needs to be provided with a considerable number of analog quantity input and output modules, the manufacturing cost is overhigh, detection and control elements can not be used in a common numerical control machine tool with not very harsh use precision, only a cooling device body is arranged, and a good motor temperature rise clamping effect can be realized.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is an electrical control interconnection diagram of the servo motor temperature active control device of the present invention.
Fig. 3 is the utility model discloses servo motor temperature active control device PLC control flow chart.
Fig. 4 is a schematic view of the adjustable mounting bracket 2.
Fig. 5 is a schematic view of an adjustable blow port 6.
Fig. 6 is a schematic view of the gas flow rate monitoring element 5.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1: adjustable installing support 2 including four block built-up connections, and with adjustable bolt and nut fixed mounting on servo motor body 1, adjust adjustable installing support 2's mounting dimension according to actual motor size of a dimension, with connect reliable and stable, control proportional valve 3 installs in cooling gas circuit total exit, be fixed in on adjustable installing support 2, annular gas circuit 4 is connected to its rear portion, be used for forming redundant formula cooling line, set up four debuggable mouth 6 of blowing respectively in four corners of L type adjustable installing support 2, gas flow monitoring element 5 is connected to the rear end of debuggable mouth 6 and is used for detecting each cooling mouth actual gas flow, gas flow monitoring element 5 is connected to total annular gas circuit 4 through the pipeline. The cooling air flow is output to an annular air passage 4 through a control proportional valve 3, and finally the servo motor is subjected to covering cooling through an adjustable air blowing opening 6 through detection feedback of an air flow monitoring element 5.
The servo motor body is provided with a mounting bracket which can be freely adjusted according to the size of the overall dimension of the motor so as to adapt to any type of servo motors configured by different numerical control systems. The whole support is divided into four blocks which are connected through bolts, and the connecting bolts are used for adjusting the overall size of the actual motor according to the actual motor overall size configured by different numerical control systems, so that the outer side of the servo motor is reliably fixed. And cooling output ports capable of freely adjusting the cooling direction are arranged at four vertexes of the mounting bracket and used for outputting cooling air flow to carry out all-dimensional covering type cooling on the servo motor. The connection between each cooling output port adopts redundant design, forms the ring pipeline and connects to prevent that single-point pipeline from blockking up the back and causing can not normally blow gas and cool. And each cooling output port is provided with a gas flow monitoring element for monitoring the pressure air flow of each cooling output port in real time so as to form closed-loop monitoring on the gas circuit. And a proportional valve is configured at the output port of the main gas path, and after the PLC program reads the state of each state, the PLC program outputs a corresponding control signal according to a set control model to control the opening state of the proportional valve.
As shown in fig. 2: a set of servo motor temperature active control device is provided with an analog quantity temperature sensor, four analog quantity gas flow sensors and an analog quantity control proportional valve, and all servo motors of the machine tool are provided with a set of motor temperature active control device to be used in a large amount to analog quantity input and output modules. Connecting four analog quantity gas flow sensors configured on a single device to an analog quantity input module by using shielded cables; a total of six analog quantity temperature sensors for detecting room temperature, which are configured by all devices, are respectively connected to the two analog quantity input modules by using shielded cables; a total of six analog quantity control proportional valves for controlling cooling flow rate, which are configured by all devices, are respectively connected to the two analog quantity output modules by using shielded cables; this can save the use of modules considerably.
The NC driving bus is connected to each shaft driving module, the motor control cable and the feedback cable are connected to each feeding shaft and the main shaft servo motor, temperature signals acquired by a driver from a servo motor internal temperature sensor in the numerical control system are read in PLC program control, and the arrangement of the motor temperature sensor is not carried out.
As shown in fig. 3: the PLC program is used for controlling the servo motor temperature active control device, so that the temperature rise amount and the rise speed of the servo motor can be accurately controlled, and the influence of heat generated by the servo motor in operation on a machine tool is effectively relieved. The PLC control algorithm of the servo motor temperature active control device is divided into 4 modes for discussion:
mode 1: when the temperature of the motor is lower than the room temperature and the temperature difference is more than or equal to 2 ℃, the proportional valve is closed.
Mode 2: when the temperature of the motor is lower than the room temperature and the temperature difference is less than 2 ℃, the proportional valve is opened according to the set minimum cooling capacity.
Mode 3: when the temperature of the motor is higher than the room temperature and the temperature difference is less than 2 ℃, the proportional valve is controlled in real time according to a PID control mode.
Mode 4: when the temperature of the motor is higher than the room temperature and the temperature difference is more than 2 ℃, the proportional valve is completely opened, and the forced cooling mode is started.
When the machine tool starts to operate in a normal cold state, firstly reading the internal temperature of the servo motor and the actual working condition environment temperature of the machine tool, comparing the two temperature values, and judging whether the current motor temperature is lower than the room temperature; at the moment, because the machine tool is in a power-off shutdown state in the earlier stage, the detected temperature of the motor is the same as the room temperature and cannot be lower than the room temperature in a state without external cooling; at the moment, a proportional valve control signal is output according to the set lowest cooling flow rate than a PLC program, the servo motor is clamped for temperature rise, and the motor temperature rise is prevented and controlled in advance. If the machine tool is in a power-on static state at any time, and any feed shaft and main shaft do not move, the temperature of the motor cannot be further increased, but is lower than the room temperature along with the cooling operation, and when the PLC detects that the temperature of the motor is lower than the room temperature by 2 ℃, the proportional valve is closed to output and cut off the cooling, and the performance of the machine tool body is also influenced because the temperature of the motor is too lower than the room temperature.
If the machine tool is not always in a static state but performs machining and cutting movement after being started, when the temperature of the motor is increased but does not exceed the room temperature by 2 ℃, the PLC program uses an FB58 'TCONT _ CP' functional block in an OB35 organization block to control the temperature processing process of continuous signals, sets the FB58 functional block GAIN as a negative value to perform pure cooling operation, and simultaneously starts PID operation to control the opening state position of the proportional valve according to the actual motor temperature and the room temperature as input variables to perform accurate control. If the temperature of the motor is detected to be too high and the temperature of the motor exceeds the room temperature by 2 ℃, the PID regulation function is closed, the control quantity of the proportional valve is set to be the maximum value, the motor is completely cooled by opening, the temperature rise of the motor is controlled in a short time, and the temperature of the motor returns to the controlled range. Therefore, the working condition temperature of the servo motor can be kept within a certain range only by adopting different control modes under different working conditions, so that the continuous change of the local temperature field of the machine tool caused by the temperature rise of the motor is relieved, and meanwhile, the performance consistency of the machine tool is ensured due to the effect of cooling airflow, so that the local temperature field of the machine tool reaches the effect of rapid balance.
Claims (3)
1. The high-precision numerical control horizontal coordinate boring servo motor temperature active control device is characterized by comprising a servo motor body (1), wherein an adjustable mounting support (2) is arranged on the outer side of the servo motor body (1), a control proportional valve (3) is arranged on the adjustable mounting support (2), the control proportional valve (3) is arranged at a main outlet of a cooling gas path, an annular gas path (4) is connected to the rear part of the control proportional valve (3) and used for forming a redundant cooling pipeline, an adjustable gas blowing opening (6) is arranged on the adjustable mounting support (2), a gas flow monitoring element (5) is connected to the rear end of the adjustable gas blowing opening (6), the gas flow monitoring element (5) is used for detecting the actual gas flow of each cooling opening, and the gas flow monitoring element (5) is connected to the main annular gas path (4) through a pipeline, the cooling air flow is output to the annular air passage (4) through the control proportional valve (3), and the adjustable air blowing port (6) carries out covering type cooling on the servo motor body (1).
2. The active temperature control device for the high-precision numerical control horizontal coordinate boring servo motor according to claim 1, wherein the adjustable mounting brackets (2) are L-shaped, four in number, and are fixedly mounted on the servo motor body (1) through adjustable bolts and nuts.
3. The active temperature control device for the high-precision numerical control horizontal coordinate boring servo motor according to claim 2, wherein four adjustable air blowing ports (6) are respectively arranged at corners of the four L-shaped adjustable mounting brackets (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021527323.3U CN212572457U (en) | 2020-07-22 | 2020-07-22 | High-precision numerical control horizontal coordinate boring servo motor temperature active control device |
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| CN202021527323.3U CN212572457U (en) | 2020-07-22 | 2020-07-22 | High-precision numerical control horizontal coordinate boring servo motor temperature active control device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115647928A (en) * | 2022-09-26 | 2023-01-31 | 常州机电职业技术学院 | Auxiliary cooling mechanism installed on numerical control machining equipment and cooling method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115647928A (en) * | 2022-09-26 | 2023-01-31 | 常州机电职业技术学院 | Auxiliary cooling mechanism installed on numerical control machining equipment and cooling method thereof |
| CN115647928B (en) * | 2022-09-26 | 2023-09-01 | 常州机电职业技术学院 | Auxiliary cooling mechanism installed on numerical control machining equipment and cooling method thereof |
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Address after: No.23, Ciba Road, Panlong District, Kunming, Yunnan 650203 Patentee after: General technology Group Kunming Machine Tool Co.,Ltd. Address before: No.23, Ciba Road, Panlong District, Kunming, Yunnan 650203 Patentee before: SHENJI GROUP KUNMING MACHINE TOOL Co.,Ltd. |