JP2011143493A - Working machine equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide working machine equipment which easily controls the temperature inside a cover surrounding a working machine using an air conditioner with low cooling capacity. <P>SOLUTION: The working machine equipment includes a liquid temperature controller 15 controlling the temperature of liquid used for the working machine 1, a heat exchanger 25 taking the air inside a factory and outside the cover 3 and exchanging heat with the liquid whose temperature is controlled by the liquid temperature controller 15, the air conditioner 35 adjusting the temperature of the air delivered from the heat exchanger 25 to a predetermined temperature and blowing out the air into the cover 3, and an exhaust duct 51 arranged in the cover 3 and discharging the air inside the cover 3 to the outside. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a processing machine facility configured to include a processing machine for processing precision parts in the industrial field such as optics, optical communication, and medical biotechnology, and is provided inside a cover surrounding the processing machine. The present invention relates to processing machine equipment for controlling temperature to a predetermined value.

  When the processing machine is continuously operated, heat is generated in each part of the processing machine. Processing machines are also affected by environmental temperature changes. When the temperature of the processing machine changes and each part of the machine is thermally deformed, there is a problem that the processing accuracy of a product processed by the processing machine is lowered. As for the problem of temperature change of processing machines, the awareness of the problem has increased due to the increase in accuracy required, and various countermeasures have been taken. Generally, in order to perform highly accurate machining, the main spindle that generates heat is cooled by circulating a coolant around the spindle head, or the processing machine is surrounded by a cover, and the machining chamber is kept at a constant temperature controlled temperature. The method to do is adopted. As a method for reducing the heat generated from the processing machine itself, in addition to cooling the main spindle, cooling of the inside of the machine main body, temperature control of hydraulic oil, lubricating oil, coolant, and the like can be cited. The method of keeping the processing chamber in a constant temperature state is a method of suppressing a temperature change of the processing machine by maintaining a constant temperature of air surrounding the processing machine using an air conditioner or the like. An example of an air conditioner is an inverter type air conditioner. As described above, there are a method for forcibly cooling the processing machine itself and a method for maintaining the temperature around the processing machine constant as a method for suppressing the temperature change of the processing machine.

  A conventional example of a method for maintaining a constant temperature around a processing machine is disclosed in Patent Document 1. Patent Document 1 discloses a precision processing apparatus that heats and cools the processing chamber so as to approach the temperature of the temperature control liquid circulating in the processing machine or the temperature of the processing machine. In the 10th to 17th lines in the upper left column of the second page of Patent Document 1, a description explaining one embodiment of a precision machining apparatus provided with an air conditioner for controlling the room temperature of the machining chamber, that is, “4”. The machining fluid circulation device supplies the water machining fluid to the machining portion of the machine, and at the same time, provides heat exchanger means to the structural parts such as the column and head of the machine 3 for circulation cooling. A processing liquid temperature control device, 6 is an air conditioner that controls the room temperature of the processing chamber 1, and 7 is a temperature control that controls the air conditioner device 6 according to the liquid temperature of the processing liquid circulation device 4 so that the room temperature approaches the liquid temperature. It is a device. " Further, in the 16th line to the 1st line of the lower right column on the second page of the second page of Patent Document 1, another example of the precision machining apparatus having a room temperature adjusting tower for controlling the room temperature of the machining chamber is shown. Description to be described, that is, “10 is a room temperature adjusting tower, and has a coiled cooling unit 11 inside, and a control liquid in the circulation device is circulated by the pump 12 to cool the air sucked from the lower suction port of the tower. , And the room temperature is controlled by jetting from the upper jet nozzle. "

JP-A 63-144916

In the precision processing apparatus provided with an air conditioner outside the processing chamber disclosed in Patent Document 1, since the air sucked into the air conditioner is outside the processing chamber, the air conditioner is affected by the temperature outside the processing chamber. If the temperature difference between the target set temperature inside the machining chamber and the temperature outside the machining chamber is large, or if the temperature fluctuation outside the machining chamber is large, the machining chamber can be adjusted to the set temperature due to the cooling capacity of the air conditioner. It may not be possible and must be replaced with a high-performance air conditioner.
Moreover, in a precision processing apparatus equipped with a room temperature adjusting tower in the processing chamber, the air in the processing chamber is sucked into the room temperature adjusting tower, and heat is exchanged with the coiled cooling unit in which the low-temperature control liquid circulates to be cooled. However, the temperature of the air in the processing chamber varies depending on the operating time of the processing machine and the processing load, and the fluctuation range increases, and the temperature in the processing chamber is set to the set temperature. May not be adjusted.

  An object of the present invention is to provide a processing machine facility that can adjust the inside of a cover surrounding a processing machine with high responsiveness and high accuracy even with an air conditioner having a low cooling capacity.

  In order to achieve the above object, according to the present invention, there is provided a processing machine facility for controlling a temperature inside a cover surrounding a processing machine to a predetermined value, which is used in the processing machine for processing a workpiece and the processing machine. A liquid temperature controller that controls the temperature of the liquid, a heat exchanger that takes in air outside the cover, and sends out air that has been heat-exchanged with the liquid whose temperature is controlled by the liquid temperature controller; and from the heat exchanger A processing machine facility comprising: an air conditioner that takes in air to be sent out and blows it into the cover at a predetermined temperature; and an exhaust port that is provided in the cover and discharges air inside the cover to the outside. Provided.

  Further, according to the present invention, the air conditioner branches the air sent from the heat exchanger and guides it to an intake port of an air cooling fan of the refrigerant, and air after cooling the refrigerant to the cover. A processing machine facility having a duct for discharging to the outside is provided.

  Further, according to the present invention, the liquid temperature controller is configured to branch the air sent from the heat exchanger and lead the air to a suction port of an air cooling fan for the refrigerant, and cover the air after the refrigerant is air cooled. And a processing machine facility having a duct for discharging to the outside.

  As described above, according to the processing machine facility of the present invention, the air conditioner is supplied with air having a temperature close to the target set temperature that is heat-exchanged with the liquid whose temperature is controlled by the liquid temperature controller. Even when the temperature difference between the target set temperature in the processing chamber and the temperature outside the processing chamber is large, the temperature of the processing chamber can be accurately adjusted by using an air conditioner having a low cooling capacity. In addition, even when the fluctuation range of the temperature outside the processing chamber is large, the air conditioner is supplied with air that has been heat-exchanged in advance and has a small fluctuation range of the temperature, so that the responsiveness of temperature control can be improved, And a constant temperature state can be maintained. In addition, since the air of the air cooling fan of the refrigerant condenser of the air conditioner or the liquid temperature controller is supplied with air at a substantially constant temperature after heat exchange, the cooling action of the refrigerant in the condenser is stabilized. The air and liquid temperature fluctuation ranges output from the air conditioner and the liquid temperature controller are almost eliminated.

It is a figure which shows one Embodiment of the processing machine equipment of this invention. FIG. 2 is a detailed view showing a main part of the processing machine facility of FIG. 1.

  FIG. 1 is a diagram for explaining an embodiment of a processing machine facility of the present invention. The processing machine 1 is a vertical machining center having linear feed axes X, Y, and Z. The processing machine 1 includes a table 7 supported so as to be horizontally movable with respect to the bed 4, a saddle 8 supported so as to be movable in a direction perpendicular to the paper surface with respect to the column 5, and movable up and down with respect to the saddle 8. And a spindle head 9 supported by the head. A spindle 10 is rotatably supported on the spindle head 9 in a vertical direction, and a tool holder (not shown) that holds a rotary tool such as a drill or an end mill is attached to the lower end of the spindle 10 with the rotary tool facing downward. It has become. The rotary tool and the work held on the table 7 move relatively by moving the linear feed axes X, Y, and Z, and the work is machined into a predetermined shape. The saddle 8 is driven by a linear motor, for example, while being guided by linear motion guides in the X-axis direction, the table 7 in the Y-axis direction, and the spindle head 9 in the Z-axis direction.

  Further, the processing machine 1 has a thermal deformation preventing means 60 for keeping the temperature distribution of the main body substantially uniform. The thermal deformation preventing means 60 includes a pump that circulates the liquid filled in the cavities inside the bed 4 and the column 5, and a circulation time control unit that starts and stops the pump to control the circulation time of the liquid. Yes. The column 5 has a temperature sensor 11 immersed in a liquid filled in the cavity. The temperature sensor 11 is immersed in the liquid so as to be positioned in the vicinity of the center of gravity of the machine body. By positioning the temperature sensor 11 in the vicinity of the center position of the machine main body, the averaged temperature of the machine main body can be detected as the body temperature. The body temperature detected by the temperature sensor 11 can be used as a reference temperature that is referred to when controlling the temperature of each part of the machine.

  FIG. 2 shows the configuration of the liquid temperature controller 15, the heat exchanger 25, and the air conditioner 35. The liquid temperature controller of this embodiment is configured as a control device that adjusts the temperature of the lubricating oil for the spindle bearing. The main shaft 10 rotatably supported by the main shaft head 9 is lubricated and cooled by lubricating oil having a constant temperature so that heat generation of the main shaft is suppressed. Since the main shaft 10 that rotates at high speed is one of the main heat sources of the processing machine 1, cooling the main shaft 10 to a predetermined temperature is very important for improving the processing accuracy. The temperature of the machine body detected by the temperature sensor 11 is referred to as the target spindle temperature. By cooling the spindle bearing that rotates at high speed, it is possible to prevent the spindle from undergoing thermal deformation (extension) in the axial direction, and to solve the thermal deformation problem of the spindle, which is one of the problems of high-efficiency machining and high-precision machining. Is possible. The liquid whose temperature is controlled by the liquid temperature controller is not limited to the lubricating oil for the main shaft, but includes other lubricating oils, cooling liquids for machine bodies, machining liquids, hydraulic oils for hydraulic equipment, and the like. Processing machines often come with these liquid temperature controllers.

  As shown in the figure, the liquid temperature controller 15 includes a cooling unit 16 that cools the lubricating oil pumped up from the tank 12 by the pump 13. The lubricating oil is supplied to the main shaft, absorbs heat, and is collected in the tank 12. The temperature of the lubricating oil recovered in the tank 12 is detected by the temperature sensor 14 (FIG. 1), and is fed back to the control unit of the cooling unit 16 to be cooled to the target temperature. The cooling unit 16 of the liquid temperature controller 15 cools the refrigerant circulating in the cooling unit 16, the compressor 18 that compresses the refrigerant gas in a vapor state into high-temperature superheated steam, and the refrigerant gas that flows out of the compressor 18. Then, the condenser 20 that liquefies, the expansion valve 22 that uses the liquefied refrigerant as a low-temperature and low-pressure refrigerant, and the low-temperature and low-pressure refrigerant removes heat from the lubricating oil pumped up from the tank 12 by the pump 13 to cool the lubricating oil. And an evaporator 24. The vaporized refrigerant flowing out of the evaporator 24 flows into the compressor 18 again and circulates in the cooling unit 16. The compressor 18 is inverter-controlled, and the rotation speed is changed and the cooling capacity is adjusted by changing the drive frequency of the motor. The cooling capacity of the compressor 18 and the opening of the expansion valve 22 are adjusted by feedback control based on the return temperature of the lubricating oil and the machine temperature of the processing machine. The condenser 20 includes an air-cooling fan 21 that cools inflowing high-temperature refrigerant gas, an air inlet 19 that allows air that has been heat-exchanged by a heat exchanger 25 to be described later, and air after the refrigerant has been air-cooled to the processing machine 1. And a duct 23 for discharging to the outside of the cover 3. In the condenser 20, the effect of removing heat from the high-temperature refrigerant gas is enhanced by the air cooling fan 21 and the cold air that flows in, and the cooling capacity of the cooling unit 16 is improved.

  The heat exchanger 25 cools the air taken in from the factory by exchanging heat between the warm air in the factory and the cold lubricating oil cooled to a predetermined temperature by the liquid temperature controller 15. , 27 to the liquid temperature controller 15 and the air conditioner 35. The liquid temperature controller 15 is supplied with cold air branched in one direction at the branch point a, and the air conditioner 35 is supplied with cold air branched in the other direction at the branch point a. The cold air that has flowed into the air conditioner 35 branches in two directions at the branch point b, one being supplied to the condenser 40 and the other being supplied to the evaporator 44. Conventionally, warm air in the factory has been supplied to the liquid temperature controller 15 and the air conditioner 35. However, in the present invention, since the heat exchanger 25 according to the present embodiment is added as a new equipment, It is supplied to the liquid temperature controller 15 and the air conditioner 35, and the cooling capacity load of the air conditioner 35 can be reduced. Further, there is almost no fluctuation in the temperature of the liquid and air output from the liquid temperature controller 15 and the air conditioner 35.

  The air conditioner 35 cools and liquefies the refrigerant circulating in the cooling unit 36, the compressor 38 that compresses the refrigerant gas in a vapor state into high-temperature superheated steam, and the refrigerant gas that flows out of the compressor 38. Between the condenser 40, the expansion valve 42 that uses the liquefied refrigerant as a low-temperature and low-pressure refrigerant, and the air that flows out of the heat exchanger 25 that has a relatively high temperature compared to the temperature of the processing chamber 2 and the low-temperature and low-pressure refrigerant. And an evaporator 44 that blows out cold air to the processing chamber 2 through a pipe 45. A fan 46 is provided for blowing air into the processing chamber 2. The condenser 40 includes an air cooling fan 41 that cools the inflowing high-temperature refrigerant gas, an air inlet 39 that flows in the cold air heat-exchanged by the heat exchanger 25, and the air after the refrigerant is air-cooled. And a duct 43 for discharging to the outside of the cover 3. Cold air flowing out from the heat exchanger 25 flows into the condenser 40 via the pipe line 27, and the heat removal effect of the high-temperature refrigerant gas is enhanced by the air cooling fan 41 and the flowing cold air. The cold air flowing out of the heat exchanger 25 flows into the evaporator 44 by the fan 46 via the branch points a and b. The cold air that has flowed into the evaporator 44 exchanges heat with the refrigerant circulating in the cooling unit 36 and is supplied to the processing chamber 2 via the pipe 45. Dirty air containing mist such as dust and oil in the processing chamber 2 is exhausted from the exhaust port 6 formed in the cover 3 to the outside of the cover 3 through the mist collector 50 through the exhaust duct 51. Therefore, dust and moisture in the processing chamber 2 are removed. Thereby, the temperature of the processing chamber 2 is adjusted to a predetermined temperature that is relatively lower than the temperature in the factory, heat generation of the processing machine 1 is suppressed, and accurate processing is performed.

  As described above, according to the processing machine facility 1 of the present embodiment, since the cool air flowing out from the heat exchanger 25 is supplied to the condenser 40 and the evaporator 44 of the air conditioner 35, the condenser 40 and The load on the evaporator 44 is reduced, which reduces the need for strong compression of the refrigerant gas with high energy consumption and high power compressors into high temperature, high pressure superheated steam. For this reason, the temperature of the processing chamber 2 can be adjusted with high responsiveness and accuracy by using an air conditioner with relatively low output and low cooling capacity, and thermal deformation of the processing machine 1 can be suppressed. . Further, since the cold air having a predetermined temperature flowing out from the heat exchanger 25 is blown to the condenser 20 of the liquid temperature controller, the temperature of the liquid to be conditioned is not changed.

  Next, when the processing machine 1 starts operating, the temperature in the processing chamber 2 may be lower than the target temperature. In that case, the refrigerant in the cooling unit 36 of the air conditioner 35 is operated in the reverse cycle of the refrigeration cycle, that is, the heat pump cycle, and warm air is supplied into the processing chamber 2. In that case, the evaporator 44 acts as a condenser, and the refrigerant gas compressed to high temperature by the compressor 38 is air-cooled by the fan 46 and liquefied. Air used for air cooling is air sent from the heat exchanger 25, warmed by air-cooling a high-temperature refrigerant gas, discharged into the processing chamber 2 through the pipe 45, and the temperature in the processing chamber 2 is reduced. Raise. The condenser 40 acts as an evaporator and takes heat from the air led from the surroundings or the heat exchanger 25 by the fan 41 to vaporize the refrigerant. The air deprived of heat is discharged through the duct 43. When the processing machine 1 is operated, the processing machine 1 also generates heat, so that the temperature in the processing chamber 2 immediately rises above the target temperature, the cooling unit 36 of the air conditioner 35 is switched to the refrigeration cycle, and the above temperature adjustment is performed. Made. In addition, it does not employ | adopt a heat pump cycle, but it provides the heater in the middle of the pipe line by which air is supplied into the process chamber 2 from the evaporator 44, and it is comprised so that the heated air may be supplied in the process chamber 2 May be.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention. For example, a horizontal machining center as a processing machine. Other processing machines such as a turning center can be used. In this embodiment, the cold air flowing out from the heat exchanger 25 branches in two directions at the branch point a, one is supplied to the liquid temperature controller 15 and the other is supplied to the air conditioner 35. It is also possible to supply only the air conditioner 35 with the cold air flowing out from the vessel 25. At that time, the light may be supplied only to the evaporator 44 without branching at the branch point b.

  Furthermore, in the present embodiment, the configuration in which the lubricating oil adjusted to the desired temperature by the liquid temperature controller 15 is diverted from the pipe for introducing the main shaft and flows into the heat exchanger 25 is shown. All the lubricating oil cooled by the evaporator 24 may be introduced into the heat exchanger 25 and then circulated to the main shaft. In this case, the lubricating oil that has passed through the evaporator 24 is further cooled, and the liquid temperature after passing through the heat exchanger 25 is controlled to be the same as the liquid temperature that is supplied to the main shaft when the above-mentioned flow is divided. . Further, the mist collector 50 is not provided, and the air in the processing chamber 2 may be discharged from the exhaust port 6 through the duct 51 to the outside of the factory. Although it has been described that air is discharged from the ducts 23, 43, 51 to the outside of the cover 3 of the processing machine 1, it is preferable to discharge the air to a place away from the air intake port of the heat exchanger 25.

DESCRIPTION OF SYMBOLS 1 Processing machine 2 Processing chamber 3 Cover 4 Bed 5 Column 7 Table 8 Saddle 9 Spindle head 15 Liquid temperature controller 20, 40 Condenser 24, 44 Evaporator 25 Heat exchanger 35 Air conditioner

Claims (3)

A processing machine facility for controlling the temperature inside the cover surrounding the processing machine to a predetermined value,
A processing machine that processes the workpiece,
A liquid temperature controller for controlling the temperature of the liquid used in the processing machine;
A heat exchanger that takes in air outside the cover and sends out air that has undergone heat exchange with the liquid whose temperature is controlled by the liquid temperature controller;
An air conditioner that takes in air sent from the heat exchanger and blows it into the cover at a predetermined temperature;
An exhaust port provided in the cover for exhausting air inside the cover to the outside;
A processing machine facility characterized by comprising:   The air conditioner has a pipe that branches the air sent from the heat exchanger and leads to the intake port of the air cooling fan of the refrigerant, and a duct that discharges the air after cooling the refrigerant to the outside of the cover. The processing machine equipment according to claim 1.   The liquid temperature controller includes a pipe that branches the air sent from the heat exchanger and leads to an intake port of an air cooling fan for the refrigerant, and a duct that discharges the air after the air is cooled to the outside of the cover. The processing machine equipment according to claim 1 or 2.

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