JP2006102939A - Processing machine installation - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a processing machine installation in a compact construction and improved to prevent changes in the thermal deformation of the processing machine with the passage of time. <P>SOLUTION: The body M of a machine tool is surrounded by a cover 47 to constitute a machine body chamber 57, which is furnished internally with a splash guard 21 to surround the processing region of the machine tool body M for preventing the chips from splashing. Air with the temperature adjusted by an air-conditioner 37 is supplied to different parts of the machine tool body M. The chips produced through processing is ejected by a chips ejecting device 27 quickly to outside the machine body chamber 57. This allows maintaining inside the machine body chamber 57 in the constant temperature condition. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a machine tool such as a machining center, a milling machine, a lathe, a grinding machine, a gear cutting machine, and an electric discharge machine, and a precision machine, a fine machine, an assembly machine, and a picking machine used in the semiconductor manufacturing, bio industry, and medical fields. The present invention relates to a processing machine facility that surrounds a processing machine such as a laser beam processing machine with a cover and maintains the inside at a constant temperature.

  In processing machines such as machine tools, a coolant is circulated through a heating element such as a spindle head to suppress heat generation and reduce thermal deformation. In addition, the processing machine is thermally deformed due to a change in the installed environmental temperature, and the degree of the heat deformation changes with time, which adversely affects the processing accuracy of the workpiece. In order to prevent this, a method of applying oil at a constant temperature to the entire processing machine and a method of putting the processing machine in a temperature-controlled room are taken. These methods have a large construction and are very expensive. In a normal temperature-controlled room, there is a temperature difference between the high and low positions, chips generated by processing machines remain in the temperature-controlled room, or an operator enters the temperature-controlled room and becomes a heat source. It is not a constant temperature room in a strict sense.

Patent Documents 1 to 3 disclose techniques for solving these problems even a little. The technology of Patent Document 1 (first conventional technology) constitutes a self-contained thermostatic chamber in which the entire machine tool is surrounded by a cover and the inside of the cover is controlled to a constant temperature by an air conditioner.
The technology of Patent Document 2 (second conventional technology) is a follow-up type oil temperature control device that controls the temperature of lubricating oil circulated in a heat generating part of a machine tool body in synchronization with the temperature of a machine body that does not generate heat such as a base. It is a thing which reduced the thermal displacement of the machine.
The technology of Patent Document 3 (third prior art) is a method in which most of the machine tool is surrounded by a splash guard, the air inside the splash guard is agitated, and the air inside and outside the splash guard is sucked and exhausted. The difference is minimized.

Japanese Utility Model Publication No. 59-183340 Japanese Utility Model Publication No. 48-27351 Japanese Patent Laid-Open No. 62-203736

  In the first prior art described above, there is no preparation room for putting tools and workpieces into the cover from the outside, the door is in direct contact with the outside, and the temperature in the cover is likely to change when the door is opened. . The ultimate purpose of providing a temperature-controlled room is not to keep the temperature in the temperature-controlled room constant, but to make the temperature of each part of the machine tool uniform. However, the first prior art merely blows out the temperature-controlled air into the room, and the temperature of each part of the airframe is made uniform by blowing out the temperature-controlled air in many areas near the heat generating part and less in the non-heat generating part. The technical idea to be disclosed is not disclosed.

The second prior art is intended to make the temperature of the heat generating portion of the machine tool body equal to the temperature of the non-heat generating portion of the machine body, but the portion where the lubricating oil circulates is cooled, but from the circulation path. The remote part is undercooled and the machine temperature of the entire machine tool body cannot be made uniform finely.
In the third prior art, the temperature in the splash guard on the front side of the column approaches the external temperature and is made uniform, but the temperature on the rear side of the column is not controlled at all, so the temperature difference before and after the column changes. Thermal deformation due to doing so can occur. In other words, the degree of warping of the column changes with time.
These prior arts do not disclose a configuration in which the temperature of each part of the machine tool main body is uniformly maintained by changing the flow rate of the conditioned air.

  The present invention has been made to solve these problems of the prior art. The object of the present invention is to surround the entire processing machine with a cover and control the temperature inside the processing machine to a desired temperature. It is to equalize the temperature of each part. Another object of the present invention is to provide a processing machine facility that eliminates temporal changes in thermal deformation of the processing machine with a compact configuration. Another object of the present invention is to provide a processing machine facility capable of preventing thermal deformation of a column due to a temperature difference between before and after the column of the processing machine with a relatively simple configuration. Another object of the present invention is to provide a processing machine facility capable of setting the temperature of an internal air-conditioning room surrounding the processing machine with a cover according to the external temperature, time, or season.

  In order to achieve the above-mentioned object, in a processing machine equipment that surrounds the entire processing machine with a cover and controls the temperature inside the processing machine, a processing machine main body that processes the work by relatively moving the tool and the work, and the processing machine main body A processing machine main body air-conditioning chamber surrounded by a cover and isolated from the outside air, a splash guard provided in the processing machine main body air-conditioning chamber, surrounding a processing area of the processing machine main body to prevent chips from being scattered, and the splash guard An open / close guard provided on a side facing the outside and shielded so that external air does not enter the processing machine main body air-conditioning chamber other than the inside of the splash guard when opened, and the temperature of each part of the processing machine main body The amount of blown air is adjusted in advance according to the amount of heat generated in each part of the processing machine main body so as to be substantially uniform. A plurality of air outlets directed toward the air, and an air blowing device that blows out the air, and a temperature and / or air temperature of the air supplied to the air blowing device so that the temperature of the air conditioning room in the processing machine main body becomes a desired temperature. A processing machine facility comprising an air conditioner for controlling a flow rate is provided.

The above-mentioned processing machine main body is a machine structure capable of processing a workpiece by performing relative movement between the tool and the workpiece. Taking a machining center as an example, it means the entire structure combining a bed, table, column, spindle head, and spindle. The relative movement between the tool and the workpiece includes three axes orthogonal to the X, Y, and Z axes, as well as the linear auxiliary feed axes of the U, V, and W axes, and the A, B, and C axes. Various objects such as a configuration in which at least one rotation feed shaft is added are objects.
With the above-described configuration, air whose temperature is adjusted to a predetermined temperature from a plurality of air blowing ports of the air blowing device and whose blowing air amount is adjusted according to the amount of heat generated in each part of the processing machine body is directed to each part of the processing machine body. The temperature inside the air conditioning chamber of the processing machine main body is maintained at a desired temperature. Accordingly, the temperature of each part of the processing machine main body becomes uniform. The air blown into the air blowing device may be released to the atmosphere from the lower part of the cover, or may be collected and returned to the air conditioner for circulation.
Also, by providing the splash guard as described above, when a workpiece is input from the outside into the processing machine body, or when the processing machine body is stopped, the workpiece machining state or tool wear state is observed from the outside, When cleaning the machine body, it can be done easily. External air flows only into the splash guard, and external air does not enter the processing machine main body air conditioning chamber other than the inside of the splash guard. Therefore, when the open / close guard is closed, air of a predetermined temperature immediately flows into the splash guard, and the temperature of the processing machine main body is hardly changed. The open / close guard refers to a plate member that is detachable with a bolt or the like in addition to the open / close door and the open / close window.

Processing machine equipment further comprising a suction-type chip discharging device that sucks chips generated when processing a workpiece with the processing machine body together with the air in the splash guard and discharges the chips outside the air conditioning chamber of the processing machine body is provided. .
By having the suction-type chip discharging device, chips are quickly discharged out of the processing machine main body air conditioning chamber, so the temperature in the splash guard is unlikely to change. The suction type chip discharger sucks air in the splash guard together with chips, so when the open / close guard is closed from the open state, the air in the splash guard is immediately replaced with air of a predetermined temperature in the air conditioning chamber of the processing machine body. The temperature of each part of the processing machine main body can be kept as uniform as possible.

A work stocker provided adjacent to the processing machine main body for holding a workpiece to be automatically exchanged with the processing machine main body, surrounding the work stocker with a cover and isolating from the external air; and the splash guard And a work stocker air-conditioning chamber provided with an opening / closing door for exchanging workpieces, and an air blowout toward the work stocker air-conditioning chamber so that the temperatures of the processing machine main body air-conditioning chamber and the work stocker air-conditioning chamber are substantially equal. There is provided a processing machine facility further comprising an air blowing device that opens a mouth and blows out air.
The work stocker air conditioning room, which is a work preparation room, prevents external air from flowing directly into the processing machine main body air conditioning room, and does not change the temperature of the processing machine main body air conditioning room even during work setup from the outside. Just do it. In addition, the workpiece can be transferred to the main body of the processing machine after the temperature of the workpiece input from the outside into the workpiece stocker air conditioning chamber has adapted to the desired temperature.

The air blowing device that blows out air into the processing machine main body air conditioning chamber has a double wall structure in which air supplied from the air conditioning device can flow through the ceiling and / or side of the processing machine main body air conditioning chamber, It is desirable that the inner wall of the double wall structure has an air blowing port whose blowing air amount is increased or decreased according to the amount of heat generated in each part of the processing machine main body.
Thereby, the opening area of the air blowing port can be increased in the vicinity of the processing machine main body where the heat generation is large so that the air blowing amount is increased, and the opening area can be decreased in the vicinity of the non-heating portion so that the air blowing amount is decreased. This is one means for making the temperature of each part of the processing machine main body as uniform as possible.

The processing machine main body air conditioning chamber and / or the work stocker air conditioning chamber preferably has an outer wall having a heat insulating material or heat insulating means. The outer wall is made of a heat insulating material, made of a material with a heat insulating material attached, or made of a material with a heat insulating air layer in between, making it difficult for heat to enter and leave the inside and outside of the cover. Management can be done reliably.
The cover is preferably made of a heat insulating material or a single cover with a heat insulating material attached thereto, and the cover is preferably attached with a gap between the processing machine main body and / or the work stocker. As a result, the external temperature is not conducted to the processing machine main body or the work stocker through the cover.

It is preferable to further include a recovery duct that recovers air inside the processing machine main body air conditioning chamber and / or the work stocker air conditioning chamber and circulates the air to the air conditioner.
Thereby, the temperature-controlled air can be circulated and used, and an energy saving effect can be obtained.

Moreover, the temperature of the said processing machine main body air-conditioning room or / and the said work stocker air-conditioning room can be set according to external temperature, time, or a season.
This configuration allows the processing machine to respond to changes in the external temperature due to local temperature differences at the processing machine installation location, special hot days, cold days, temperature fluctuations due to the time of day, seasonal temperature fluctuations, etc. The temperature settings in the main unit air conditioning room and work stocker air conditioning room can be changed gently. In other words, the internal temperature and the external temperature of the processing machine main body air conditioning room and work stocker air conditioning room do not differ greatly, and if the external temperature is high, the internal temperature is relatively high, and if the external temperature is low, the internal temperature is relatively low. Can be changed manually or automatically. This also saves energy. Also, there is an effect that the temperature in the work stocker air-conditioning room returns to a predetermined value in a short time after the work is transferred between the work stocker air-conditioning room and the outside.

  The above processing machines include machine tools such as machining centers, milling machines, lathes, grinding machines, gear cutting machines, electrical discharge machines, and precision processing machines, fine processing machines, and assembly processing machines used in the semiconductor manufacturing, bio industry, and medical fields. , Wide-range processing machines such as picking devices and laser beam processing machines are included.

An embodiment of the present invention will be described in detail with reference to the drawings, taking a machine tool (machining center) as an example. 1 is a side sectional view of the processing machine facility of the present invention as viewed from the right side, FIG. 2 is a sectional view taken along the line II-II in FIG. 1, and the processing machine facility is viewed from the front, and FIG. It is III sectional drawing, and it sees the inside of a preparation room from the left side.
The machine tool body M includes a table 3 that moves on the floor 1 in the X-axis direction, a column 5 that moves on the bed 1 in the Y-axis direction, and a front surface of the column 5 that moves up and down the Z-axis. It is mainly composed of a spindle head 7 that moves in the direction. The spindle head 7 incorporates a rotating vertical spindle 9. An X-axis motor 11 is provided on the right side of the bed 1, a Y-axis motor 13 is provided on the rear side, and a Z-axis motor 15 is provided on the top of the column 5. A work 19 is placed on the table 3 via a work pallet 17, and relative movement in the X, Y, and Z axis directions is performed with the tool 24 attached to the lower end of the main spindle 9 to process the work 19. The

A tool magazine 23 is attached to the right side of the table 3 via a magazine pallet 25. A plurality of tools 24 are stood and stored in the tool magazine 23 and are automatically exchanged with the spindle 9 by a well-known method.
The table 3 and the spindle 9 are surrounded by a splash guard 21 so that chips and machining fluid are not scattered. Chips generated by cutting the workpiece 19 fall below the splash guard 21 and are quickly sucked and conveyed by a suction fan 29 of a chip discharging device 27 provided outside. In the chip discharging device 27, the chips are put in a chip receiver 31, and the air containing the machining fluid mist passes through a filter 33 having a mist collector function, and is recovered and circulated through an air recovery duct 35 to an air conditioner 37. Is done. In FIG. 1, the chip discharge device 27 is drawn on the rear side of the air conditioner 37 for convenience, but actually, the chip discharge device 27 is provided in the vicinity of the splash guard 21, and the chip conveyance path has an inclined short cylindrical shape. The air from the chip discharging device 27 may be immediately released to the atmosphere from the chip discharging device 27 without being collected and circulated by the air conditioner 37. Although not shown in the drawing, the machining liquid is collected together with the chips to the chip discharging device 27, separated from the chips in the chip discharging device 27, and circulated and used through a processing liquid tank with a liquid temperature control device. The chip discharge device may be of any type such as other lift-up conveyor type, screw conveyor type, scraper conveyor type.

On the other hand, a stocker 39 is disposed on the left side of the machine tool main body M, and two work pallet bases 41 and two magazine pallet bases 43 for placing the work pallet 17 and the magazine pallet 25 are provided on the stocker 39.
A robot 45 is provided between the splash guard 21 and the stocker 39, and the work pallet 17 on which the work 19 is placed is automatically exchanged between the table 3 of the machine tool main body M and the work pallet base 41 of the stocker 39. Or the magazine pallet 25 on which the tool magazine 23 is placed is automatically exchanged between the right side portion of the table 3 of the machine tool main body and the magazine pallet base 43 of the stocker 39.

  The machine tool main body M, the stocker 39 and the robot 45 are surrounded by a cover 47 on the ceiling, four side surfaces and the bottom surface, and are isolated from the outside. In the present embodiment, the ceiling 47 and the bottom surface of the cover 47, the four side surfaces around the machine tool main body M, and the two side surfaces around the stocker 39 have a double wall structure. And the inner wall 51. A plurality of air outlets 53 are opened in the inner wall 51. The air in the cover 47 is recovered and circulated to the air conditioner 37 through the air recovery duct 35 from the gap between the air outlet hole 55 formed in the inner wall on the bottom surface and the outer wall on the bottom surface. In the present embodiment, the air in the cover 47 is collected and circulated in the air conditioner 37, but may be released to the atmosphere without providing the air collecting duct 35.

Since the X-axis motor 11, the Y-axis motor 13, and the Z-axis motor 15 generate heat, they are exposed to the outside of the cover 47. Since the Z-axis motor 15 moves in the Y-axis direction, the cover around the Z-axis motor 15 is actually provided with a movable cover such as a telescopic cover for the Y-axis stroke length, although not shown.
The left side cover of the splash guard 21 constitutes a partition wall 48 extending up and down and front and back to reach the inner wall 51. The partition wall 48 partitions the inside of the cover 47 into a machine main body chamber 57 and a work preparation chamber 59. The machine main body chamber 57 is the machine tool main body air-conditioning chamber of the claims, and the preparation chamber 59 is the work stocker air-conditioning chamber. An inner door 61 is provided on the left side surface of the splash guard 21 and is moved up and down by an actuator 63 so as to be opened and closed. The inner door 61 is opened when the work pallet 17 and the magazine pallet 25 are replaced, and is closed at other times. The inner door 61 may be configured to open to the machine body chamber 57 side or may be configured to open to the preparation chamber 59 side.

  The left side cover 65 of the preparation chamber 59 is provided with an outer door 67, which is moved up and down by an actuator 69 and can be opened and closed. The outer door 67 is opened and normally closed when taking out the processed workpiece on the stocker 39, loading the workpiece to be processed on the stocker 39, and replacing the tool in the tool magazine 23 on the stocker 39.

The air conditioner 37 includes a suction fan 71 for sucking air in the machine main body chamber 57 and the preparation chamber 59 through the air recovery duct 35, a filter 73, a cooler 75 for cooling air, a heater 77 for heating air, and A blower fan 79 supplies the temperature-controlled air to the machine body chamber 57 and the preparation chamber 59. The blower fan 79 has a variable rotation speed and is operated so that the internal pressure in the machine body chamber 57 and the preparation chamber 59 is higher than the external pressure (atmospheric pressure), and the blown air amount can be changed by temperature control described later. it can. The internal pressure becomes higher than the external pressure by supplying air at a flow rate greater than the sum of the amount of air leakage and the amount of air recovered.
In this embodiment, an air volume control valve 81 is provided in the double wall at the boundary between the machine body chamber 57 and the preparation chamber 59 so that the amount of air supplied to the preparation chamber 59 can be adjusted. Control of the operation of the air volume adjusting valve 81 and the suction fan 71, the cooler 75, the heater 77, and the blower fan 79 of the air conditioner 37 is performed by a control device (not shown).

In addition, a coolant whose temperature is controlled is circulated through the spindle head 7, the X, Y, and Z-axis ball screws, etc., which generate a large amount of heat, and the machining fluid is warmed by the cutting heat, so the fluid is introduced into the machining fluid circulation circuit. It is preferable to intervene a temperature controller as appropriate separately from the present invention.
The temperature-controlled and pressure-controlled air supplied from the air conditioner 37 into the double wall structure is ejected from the air outlet 53 of the inner wall 51 of the machine body chamber 57 and the preparation chamber 59 as shown by the arrows in the figure. It is recovered from the air outlet hole 55 on the bottom surface. The splash guard 21 is appropriately provided with a gap of an armored door type, and the temperature-controlled air can enter the splash guard 21 as shown by the arrow in the figure. Since the air in the splash guard 21 is sucked together with the generated chips by the chip discharging means 27, the air in the splash guard 21 is always replaced.

  Air is blown out to the inner wall 51 near the heat generating portion such as around the spindle head 7, around the motors 11, 13, 15 of the X, Y, and Z axes, around the recovery path of the machining fluid, around the outer door 67 of the preparation chamber 59 where the outside air enters. Many openings 53 are opened, and few air blowing openings 53 are opened on the inner wall 51 in the vicinity of the non-heat generating portion such as the back surface or the lower portion of the machine tool main body M or the lower portion of the preparation chamber 59. As a result, the temperature of each part of the machine body can be made substantially uniform, and the temporal change in temperature can be eliminated.

  As a method of changing the amount of air blown out from the inner side wall 51, in addition to the method of previously determining the location where the air blowout port 53 is to be drilled at the design stage and changing the number of drilled holes according to the location, a large number of pitches in advance at equal pitches. The air blowing port 53 is previously drilled, a method of covering the portion where the air blowing port 53 should be reduced, and a plate member of an appropriate size having holes of the same size as the inner wall 51 at the same pitch. An appropriate method such as a method of changing the blown air amount by adjusting the opening area of the blowout port in accordance with the slide amount may be adopted, in close contact with the inner wall 51 where the airflow is to be adjusted. .

The temperature sensor A measures the temperature of the air sent from the air conditioner 37, the temperature sensor B measures the temperature of the return air from the machine body chamber 57, and the temperature sensor C measures the temperature of the return air from the preparation chamber 59. The temperature sensors D and E measure, for example, the front side temperature and the rear side temperature of the bed 1, respectively.
First, the air conditioner 37 is operated with the cooler and the heater turned ON / OFF so that the temperature sensor A is within a predetermined range. When the outer door 67 is opened and the value of the temperature sensor C exceeds the allowable value, the rotational speed of the blower fan 79 is increased, or the air volume control valve 81 is opened to increase the amount of air introduced into the preparation chamber 59. As a result, the temperature of the preparation chamber 59 is quickly set to a predetermined temperature, and the temperature of the workpieces and tools input from the outside is quickly adjusted to the predetermined temperature. Alternatively, since the preparation chamber 59 has air flow to and from the outside, air having a flow rate higher than the flow rate supplied to the machine body chamber 57 may be supplied in advance.

Usually, the temperature and / or flow rate of air discharged from the air conditioner 37 is controlled so that the temperature difference between the temperature sensors A and B falls within a predetermined range. However, if the temperature difference exceeds a predetermined value, it is determined that the heat is abnormally generated from the machine tool main body M, and the machining is stopped. The air blowing port 53 is provided so that the temperature of each part of the machine tool main body M is substantially uniform. However, for example, the temperature difference between the parts of the machine body is detected by the temperature difference between the temperature sensors D and E for some reason. The processing can be stopped.
The workpiece 17 and the tool 24 input from the outside to the preparation chamber 59 can be transferred to the machine tool main body M because the value of the temperature sensor C is within an allowable range and the elapsed time after the input from the outside is a predetermined value. It is after reaching. Instead of determining based on the elapsed time, a method of measuring the temperature of the workpiece or tool with a non-contact type temperature sensor and determining whether the measured value is within an allowable range may be used.

  Further, interlock control is performed to prohibit the opening of the inner door 61 when the outer door 67 is open, and prohibit the opening of the outer door 67 when the inner door 61 is open, so that the outside air flows into the machine body chamber 57. To prevent that. Since the internal pressure in the machine main body chamber 57 and the preparation chamber 59 is set higher than the external pressure (atmospheric pressure), the outside air does not enter from any gap, and the inside of the machine main body chamber 57 and the preparation chamber 59 A constant temperature state can be reliably maintained.

  In the present embodiment, the example in which the workpiece preparation chamber and the tool preparation chamber are used as one preparation chamber 59 has been described, but they may be provided separately. For example, on the left side of the machine tool main body M, an automatic pallet exchange arm is provided instead of the robot 45, a pallet magazine is provided instead of the stocker 39, and there is a work preparation room surrounded by a cover. Furthermore, a tool magazine is provided on the right side of the machine tool main body M, and an automatic tool change is performed between the spindle and the main shaft by the ATC arm, and there is a tool preparation chamber in which the tool magazine and the ATC arm are surrounded by a cover. . Alternatively, when the thermal deformation of the tool can be ignored, there is also an aspect in which only the workpiece preparation chamber is provided and the tool preparation chamber is not provided.

Further, in the present embodiment, an example in which air is blown out from the ceiling and the side wall 51 on the side surface and air is collected from the bottom surface has been described, but it may be blown out only from the ceiling or may be blown out only from the side surface. Alternatively, the air may be blown out only from the inner side wall of the ceiling, and the air may be sucked and collected from the side and bottom surfaces. An air flow can also be generated in the machine main body chamber 57 and the preparation chamber 59 by sucking air.
In addition, when the outer side wall 49 of this embodiment is comprised with a heat insulating material, or it is comprised by sticking a heat insulating material, it is convenient that the temperature of the temperature-controlled air which distribute | circulates an inside does not change easily. Moreover, even if the outer wall 49 is formed of a heat insulating hollow structure provided with an air layer that does not flow between them, a heat insulating effect can be obtained in the same manner as that of the heat insulating material.
Rather than a double-wall structure consisting of an outer wall 49 and an inner wall 51, the machine body room 57 and the preparation room 59 are surrounded by a single cover made of heat insulating material or attached with heat insulating material, and air-conditioned air is machined. You may comprise so that it may blow out from the several nozzle of the piping provided around the machine main body M, the stocker 39, and the robot 45. FIG. In that case, it is preferable that the single cover does not adhere to the outside of the machine tool main body M or the stocker 39 but is provided with a gap. When it is necessary to fix the single cover to the machine tool main body M or the stocker 39, it is necessary to devise such as attaching via a spacer made of a heat insulating material. By doing so, there is an effect of preventing the external temperature from being transmitted to the machine tool main body M and the stocker 39 through the cover.

  An opening / closing guard 22 is provided on the front side of the splash guard 21. The periphery of the opening / closing guard 22 is shielded and connected to the outer wall 49, so that external air does not enter the machine main body chamber 57 even when the opening / closing guard 22 is opened. With this open / close guard 22, a workpiece is put on the table 3 from the outside, the operation of the machine tool main body M is stopped, a machining state of the workpiece and a tool wear state are observed from the outside, and the machine tool main body M is maintained. It can be carried out. Even when the opening / closing guard 22 is opened, the outside air flows only into the splash guard 21, and the outside air does not flow into the machine body chamber 57 around the splash guard 21. When the opening / closing guard 22 is closed after the work is completed, the chips in the splash guard 21 are sucked together with the air by the chip discharging device 27, so that air of a predetermined temperature immediately flows into the splash guard 21, and the machine tool main body. The temperature of M is hardly changed. The opening / closing guard 22 may be a plate member that does not have a hinge and is detachably attached with a bolt or the like.

A configuration without the stocker 39 and the robot 45, that is, a configuration without the preparation chamber 59, or without the partition wall 48, the machine tool main body M, the stocker 39 and the robot 45 are surrounded by one cover, and there is no concept of the preparation chamber. The present invention also holds in the configuration. In addition, the splash guard 21 and the open / close guard 22 can be provided even in a configuration without a preparation chamber, and a recovery duct 35 can be provided to circulate air to the air conditioner.
Further, in the present embodiment, the temperature-controlled air is blown out from the air blowing port 53 of the inner wall 51 through the inside of the double wall structure, but instead of this configuration, the machine main body chamber 57 and the preparation chamber are transferred from the air conditioner 37. The air blowing device may be configured so that the pipe is routed to 59, a plurality of air blowing nozzles are provided at appropriate positions, and the same action is performed.
The machine tool main body M of the above embodiment shows an example of a so-called machining center having an automatic tool changer. However, in place of the machining center, a precision processing machine, a fine processing machine, and an assembly process used in the semiconductor manufacturing, bio industry, and medical fields. The present invention is also applicable to processing machine equipment that surrounds a processing machine such as a machine, a picking device, or a laser beam processing machine with a cover and maintains the inside at a constant temperature. In this case, it is needless to say that there are two configurations: a configuration in which the workpiece preparation chamber 59 is provided and a configuration in which the workpiece preparation chamber 59 is not provided.

Next, another embodiment of the present invention will be described with reference to FIGS. FIG. 4 is a side sectional view of a machine tool facility according to another embodiment, and FIG. 5 is a VV sectional view of FIG. 4, which is a top view of the machine tool facility.
The machine tool main body includes a bed composed of a front bed 101 and a rear bed 103 fixed to a floor surface, a table 105 that moves on the front bed 101 in the X-axis direction, and a column 107 that moves on the rear bed 103 in the Z-axis direction. And a spindle head 109 that moves in front of the column 107 in the vertical Y-axis direction. The spindle head 109 incorporates a rotating horizontal spindle 111. On the table 105, the scale 113 is placed, and the work 115 is fixed to the vertical surface of the scale 113. A relative motion in the X, Y, and Z axis directions is performed between a tool (not shown) attached to the tip of the main shaft 111 and the workpiece 115, and the workpiece 115 is machined. Chips generated by processing fall onto the trough 117 and are discharged out of the machine together with the processing liquid by a chip discharge device (not shown).

A machining area including the table 105 and the spindle head 109 is surrounded by a splash guard 119 on the ceiling and the four side surfaces, and a machining chamber 121 is formed.
On the other hand, the rear of the column 107 is surrounded by a rear cover 123 on the ceiling and the four side surfaces, and a column rear chamber 125 is formed. The cover at the boundary between the processing chamber 121 and the column rear chamber 125 has a seal member that can slide on the upper surface and both side surfaces of the column 107.

  A blower 127 is provided outside the processing chamber 121 and the column rear chamber 125 to supply air at the same temperature to the processing chamber 121 and the column rear chamber 125. The air supplied to the processing chamber 121 and the column rear chamber 125 is released to the outside through holes in the lower portions of the processing chamber 121 and the column rear chamber 125. With this configuration, the temperatures on the front and rear sides of the column are equalized, and the column is not warped due to the temperature difference between the front and rear surfaces of the column.

In addition, if an air conditioner capable of sending air adjusted to a predetermined temperature is provided instead of the blower 127, the processing chamber 121 and the column rear chamber 125 can realize a constant temperature chamber at the same temperature. The time change of the thermal deformation of is also eliminated. When an air conditioner is adopted, it is desirable to connect holes in the lower part of the processing chamber 121 and the column rear chamber 125 to an air recovery duct (not shown) so that air circulates to the air conditioner.
When air is supplied to the processing chamber 121 and the column rear chamber 125 using a blower or an air conditioner, the amount of heat generated in the processing chamber 121 is higher and the volume is larger, so the flow rate of air supplied to the column rear chamber 125 is larger. A large flow rate is supplied into the processing chamber 121 or air at a lower temperature is supplied so that the processing chamber 121 and the column rear chamber have the same temperature.
Usually, the splash guard 119 is provided in the machine tool main body, and a simple machine tool thermal deformation prevention device can be easily realized by providing a column rear cover 123 and providing a blower 127 or an air conditioner.

Next, a method for setting the target temperature of the air conditioner in place of the air conditioner 37 in the first embodiment and the blower 127 in the second embodiment will be described with reference to FIGS. Since the setting method is the same for the air conditioner 37 of the first embodiment and the air conditioner of the second embodiment, the air conditioner 37 of the first embodiment will be representatively described.
FIG. 6 is a detailed block diagram of the air conditioner 37. The cooler 75 and the heater 77 are operated so that the temperature sensor A can detect the target temperature set by the target temperature setter 151. That is, the temperature controller 153 compares the target temperature, which is the output of the target temperature setter 151, with the detected temperature of the temperature sensor A, and gives an instruction to operate the cooler 75 or the heater 77 according to the comparison result. Done by giving to. The target temperature may be set to a constant value throughout the year, or may be changed gradually according to the external temperature. The reason why the temperature gradually changes according to the external temperature is that if the difference between the external temperature and the internal temperature of the machine body chamber 57 or the preparation chamber 59 is large, the energy consumption of the air conditioner increases or the internal temperature of the preparation chamber 59 is predetermined This is to solve the problem that it takes time to become a value. The target set temperature can be changed gradually within a range that does not adversely affect machining accuracy. For example, the installation environment of machine tools is bad and the external temperature changes greatly during the day, there are cold days or hot days at the turn of the season, and the difference between the summer and winter temperature varies depending on the season. Change target set temperature. Although the operator may change it manually according to experience and intuition, it is preferable to automatically change the target set temperature according to a certain algorithm.

First, a first target temperature setting method will be described with reference to FIGS. FIG. 7 is a detailed block diagram of the target temperature setter 151 that implements the first target temperature setting method, and FIG. 8 is an operation flow diagram of the arithmetic device 161.
In consideration of seasonal variation and weekly variation factors, the annual / weekly target temperature is input from the annual / weekly target temperature input device 165 and stored in the storage device 163. For example, a function that connects a winter 18 ° C. and a summer 28 ° C. with a smooth curve is stored. In consideration of the working time of the machine tool, a target temperature change timing such as Saturday, Sunday or weekday night is input from the target temperature change timing input device 167 and stored in the same manner. In consideration of the temperature follow-up characteristic of the machine tool main body M, a target temperature change speed of, for example, 0.1 ° C./hour is input from the target temperature change speed input device 169 and stored in the same manner. These inputs may be incorporated in the storage device 163 in advance in the form of a ROM or the like without depending on the input device.

  Here, the arithmetic device 161 calculates the target set temperature at intervals of 10 minutes and outputs the target temperature. That is, it is determined in step S1 whether the processing cycle has elapsed. If YES, whether the target temperature change time is determined in step S2 is the current time obtained by the calendar & clock function 159 and the target temperature stored in the storage device 163 in advance. Judge by comparing with the time of change. If NO, the process ends without calculating the target temperature. If step S2 is YES, the current set target temperature is calculated from the annual and weekly target temperatures stored (step S3). In step S4, the output target temperature currently being output and the calculated target temperature calculated in step S3 are compared. If they are the same, the process ends with YES. If they are different, the process proceeds to step S5 with NO. In step S5, the difference between the output target temperature and the calculated target temperature is compared with a value Δtemperature corresponding to a processing period of 10 minutes of the target temperature change speed stored in advance in the storage means 163. If equal or smaller, the process proceeds to step S7 with NO. For example, the Δ temperature is (0.1 / 6) ° C. corresponding to 10 minutes if the target temperature changing speed is 0.1 ° C./hour. In step S6, the new target temperature is calculated by adding Δ temperature to the current target temperature, and it is output in step S8. Then, the value obtained by adding Δ temperature once more is calculated and output in the next 10 minutes. This is a measure for preventing the machining accuracy from being adversely affected if the target temperature is suddenly raised. In step S7, the new target temperature is set as the calculation target temperature in step S3 and output in step S8. In this way, a series of calculations is completed, and the target temperature is output from the target temperature setter 151. The machine operation status reading IF (interface) 157 is not necessary to change the target temperature while the machine tool is in operation, and is required when the target temperature is not calculated during operation.

Next, a method for setting the second target temperature will be described with reference to FIGS. FIG. 9 is a block diagram showing the detailed configuration of the target temperature setter 151 that realizes the second target temperature setting method, and FIG. 10 is an operation flowchart of the arithmetic device 161. Means having the same functions as those in FIGS. 7 and 8 are denoted by the same reference numerals, and description thereof will be omitted.
An outside air temperature calculation method, for example, a method for taking a moving average temperature for 3 days, a method for taking a temperature obtained by a mean square method for 5 days, and the like are input from the outside temperature calculation method setting device and stored in the storage device 163.

Step S11 is the same operation as S1. In step S12, if the current time read from the calendar & clock function 159 is the outside air temperature calculation time, the outside air temperature, which is the outside temperature, is read by the temperature sensor F through the outside air temperature measuring device 171. In step S13, for example, the moving average temperature of the outside air temperature for 3 days is calculated. Step S14 is the same as S2. In step S15, the currently set target temperature is calculated based on the set method, that is, the moving average temperature calculation formula. Since steps S16 to S20 perform the same operations as steps S4 to S8, the description thereof will be omitted.
As described above, the first target temperature setting method can predict a pattern in which the external temperature changes yearly or weekly, and uses the average value. The second target temperature setting method reads the external temperature at a predetermined sampling interval when the external temperature changes within a day for a reason that cannot be anticipated, or when the temperature difference between the temperature is large for several days. The average temperature is calculated and a slowly changing temperature pattern is created and used.

  As described above, according to the present invention, constant temperature air flows through the entire region of the processing machine main body air conditioning chamber, and the room temperature is maintained at a predetermined value. Then, air having a predetermined temperature is blown out from the plurality of air blowing ports of the air blowing device toward each part of the processing machine main body, and the temperature of each part of the processing machine main body becomes substantially uniform. By adopting a double wall structure cover, it is possible to easily set the air outlet so that the amount of air blown out increases near the heat generating body of the processing machine main body, and the amount of air blown out decreases near the non-heat generating part. become. Therefore, the temperature of each part of the processing machine main body can be made more uniform. The prior art was aimed at maintaining the temperature around the machine tool body at a constant temperature, that is, maintaining the temperature of the machined machine air-conditioning room constant, but the present invention has a deeper purpose. Can be achieved, and the machining accuracy of the workpiece is greatly improved.

In addition, there is a work stocker air conditioning room into which temperature-controlled and pressure-adjusted air is introduced from the air conditioner, so that direct flow of external air into the processing machine main body air-conditioning room can be prevented. Even at times, it is not necessary to change the temperature of the air conditioning room of the processing machine body. Further, the workpiece can be transferred to the main body of the processing machine after the temperature of the workpiece input from the outside into the workpiece stocker air conditioning chamber has adapted to a predetermined temperature. The generated chips are discharged one after another by the chip discharging device to the outside of the processing machine main body air conditioning chamber, and the heat generated from the chips hardly remains in the machine main body chamber.
By changing the flow rate of air supplied to the processing machine main body air conditioning room and the work stocker air conditioning room, the temperature of the processing machine main body air conditioning room and the temperature of the work stocker air conditioning room can be maintained at appropriate values, respectively. The temperature difference between the room and the work stocker air conditioning room can be maintained at an appropriate value. Since the internal pressure is higher than the external pressure (atmospheric pressure), there is no inflow of external air into the processing machine main body air conditioning chamber or work stocker preparation chamber. Further, if an air recovery duct is provided to circulate air to the air conditioner, an energy saving effect can be obtained.

Thus, the compact configuration surrounding the processing machine main body and the workpiece stocker can eliminate the thermal deformation of the processing machine main body and the temporal change of the thermal deformation. Further, the workpiece can be machined after the temperature of the workpiece to be machined is adjusted to a predetermined temperature. Therefore, according to the processing machine equipment of the present invention, the processing accuracy of the workpiece is greatly improved.
Furthermore, according to the present invention, the temperature difference between the front side and the rear side of the column is eliminated with a simple configuration, and the column is not thermally deformed. Therefore, the processing accuracy of the workpiece by the processing machine equipment of the present invention is improved.

  According to the present invention, the temperature in the air-conditioned room where the conditioned air is blown out can be set according to the external temperature, time or season, so that the temperature difference in the day is large, throughout the year, the week In a place where the temperature difference is large, the set temperature in the air-conditioned room can be changed gradually, and an energy saving effect can be obtained with almost no adverse effect on the machining accuracy. There is also an effect that the process of synchronizing the temperature of the workpiece with the temperature of the machine tool body in advance in the preparation room can be achieved in a short time.

It is the sectional side view which looked at the processing machine equipment which shows one Embodiment of this invention from the right side. FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 1 and shows the processing machine equipment as viewed from the front. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2, as viewed from the left side in the preparation chamber. It is a sectional side view of the processing machine equipment which shows other embodiment of this invention. FIG. 5 is a cross-sectional view taken along the line V-V in FIG. 4 and shows the processing machine equipment as viewed from above. It is a detailed block diagram of the air conditioner 37 of FIG. It is a detailed block diagram concerning the 1st target temperature setting method of the target temperature setter 151 of FIG. It is a calculation operation | movement flowchart of a 1st target temperature setting method. It is a detailed block diagram concerning the 2nd target temperature setting method of the target temperature setting device 151 of FIG. It is a calculation operation | movement flowchart of the 2nd target temperature setting method.

Explanation of symbols

1 bed 3 table 5 column 7 spindle head 19 work 21 splash guard 22 open / close guard 23 tool magazine 24 tool 27 chip discharge device 35 air recovery duct 37 air conditioner 39 stocker 45 robot 47 cover 49 outer side wall 51 inner side wall 53 air outlet 57 Machine body room 59 Preparation room 61 Inner door 67 Outer door 71 Suction fan 75 Cooler 77 Heater 79 Blower fan 101 Front bed 103 Rear bed 105 Table 107 Column 109 Spindle head 115 Work 119 Splash guard 121 Processing chamber 123 Rear cover 125 Column rear part Room 127 Blower

Claims (5)

In the processing machine equipment that surrounds the entire processing machine with a cover and controls the temperature inside it,
A processing machine body that processes the workpiece by relatively moving the tool and the workpiece;
A processing machine body air conditioning chamber that surrounds the processing machine body with a cover and is isolated from the outside air;
A splash guard that is provided in the processing machine main body air-conditioning chamber, surrounds a processing area of the processing machine main body, and prevents scattering of chips,
An open / close guard provided on a side facing the outside of the splash guard and configured to shield external air from entering the processing machine main body air-conditioning chamber other than in the splash guard when opened;
A plurality of air outlets are opened to the respective parts of the processing machine body by adjusting the amount of blown air in advance according to the amount of heat generated by the respective parts of the processing machine body so that the temperatures of the respective parts of the processing machine body are substantially uniform. An air blowing device for blowing out air;
An air conditioner for controlling the temperature and / or flow rate of air supplied to the air blowing device so that the temperature in the air conditioning room of the processing machine main body becomes a desired temperature;
A processing machine facility characterized by comprising:   The processing according to claim 1, further comprising a suction-type chip discharging device that sucks chips generated when processing a workpiece with the processing machine main body together with air in the splash guard and discharges the chips outside the air conditioning chamber of the processing machine main body. Mechanical equipment. A work stocker that is provided adjacent to the processing machine main body and holds a work that is automatically exchanged with the processing machine main body;
A work stocker air-conditioning chamber that surrounds the work stocker with a cover, isolates it from outside air, and has an open / close door for exchanging work between the splash guard;
An air blowing device that opens an air blowing port toward the work stocker air conditioning chamber so that the temperatures of the processing machine main body air conditioning chamber and the work stocker air conditioning chamber are substantially equal;
The processing machine equipment according to claim 1, further comprising:   The processing machine equipment according to any one of claims 1 to 3, further comprising a recovery duct for recovering air inside the processing machine main body air conditioning chamber and / or the work stocker air conditioning chamber and circulating the air to the air conditioning device. .   The processing machine equipment according to any one of claims 1 to 4, wherein the temperature of the processing machine main body air conditioning room and / or the work stocker air conditioning room can be set according to an external temperature, time, or season.

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