JP2011152629A - Temperature control device for precision machining machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a temperature control device for a precision machining machine that stably maintains the temperature of a precision machining machine and that of inside a cover surrounding the machine as a whole at a constant level so as to contribute to improvement in machine accuracy by eliminating variations in environmental temperature. <P>SOLUTION: An air conditioner 70 has an air outlet 72 for blowing out air into a cover 66 housing a machining machine, and an air suction port 74 for sucking air inside the cover 66. The air conditioner is arranged outside the cover 66. The air conditioner 70 is connected with air blow-out ducts 77a, 77b penetrating a bed 10 through cast spaces of the bed 10. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a temperature control device used for maintaining a constant temperature environment in a precision processing machine such as a roll lathe for processing a mold roll for forming an optical film.

  In recent years, ultra-precision machining using a roll lathe has progressed, and ultra-precision machining of a roll mold for forming a lenticular lens, a cross lenticular lens, a prism sheet, etc. used in a liquid crystal panel has been realized.

  In roll lathes that perform this type of ultra-precision machining, in order to achieve ultra-precision machining, it is necessary to solve various problems that were not a problem with conventional roll lathes.

  Conventionally, various measures have been taken in order to avoid adverse effects due to environmental temperature changes of the processing machine. This is because there are various heat sources such as lighting and motors in the factory, and if the environmental temperature fluctuates due to heat generation, thermal deformation occurs in the structure such as the bed, which adversely affects the processing accuracy.

In order to suppress this type of environmental temperature fluctuation, a precision processing machine is surrounded by a cover and the temperature in the cover is adjusted.
For example, Patent Document 1 proposes a cover made of a porous heat shield as a cover surrounding a machine tool. By surrounding the machine tool using this porous shield, the machine tool is shielded from the influence of temperature changes outside the cover.

  On the other hand, the processing machine also has many heat generating parts such as a motor and a guide surface, and it is insufficient for temperature adjustment just by covering with a cover. Therefore, in Patent Document 2, the inside of the cover is divided into a processing area and other areas, and the cooling air is covered from the top of the cover with a blowing amount corresponding to the heat generation amount in the processing area and the other areas. Propose to blow inside.

In addition, as temperature countermeasures conventionally taken, the processing machine itself is placed in a temperature-controlled room, or cooling water is allowed to flow through a structure such as a bed.
JP 2005-254334 A JP 2003-291050 A

  However, in the conventional temperature control system that surrounds the processing machine with the cover and blows out air for cooling, air is blown toward the processing machine, so the heat generating part of the machine and the part that does not generate heat are balanced and stable. Therefore, it is difficult to keep the temperature of the entire machine constant and to reduce the temperature difference between the inside and outside of the machine.

  On the other hand, with the conventional temperature control system that allows cooling water to flow through a machine structure such as a bed, it is easy to cool individual heating parts, but conversely it is difficult to overcool or keep the temperature of the entire machine constant. Met. There was also a problem of leakage of cooling water and generation of rust.

  Accordingly, an object of the present invention is to eliminate the problems of the prior art and to keep the temperature of the structure of the precision processing machine and the cover surrounding it as a whole stable and constant. An object of the present invention is to provide a temperature control device for a precision processing machine that eliminates the fluctuations and contributes to improvement in machine accuracy.

  In order to achieve the above-mentioned object, the present invention is a temperature control device for a precision processing machine having a bed in which a casting space is partitioned, and accommodating the entire precision processing machine inside the cover. An air conditioner having an air outlet for blowing air into the cover and an air inlet for sucking air inside the cover is disposed outside the cover, and air passes through the bed through the casting space of the bed. The blowout duct is connected to the air conditioner.

  In the present invention, the air blowing duct is provided on one end side of the bed, the first blowing duct penetrating the casting space of the bed, and is connected to the blowing outlet to be one end of the first blowing duct. A first distribution duct that distributes air to the other end, a second distribution duct that is disposed on the other end side of the bed and distributes air to the other end of the first blowing duct, the first distribution duct, and the first distribution duct. The two distribution ducts can be connected to each other.

  In the present invention, the first blowout duct is composed of a plurality of blowout ducts extending in parallel with the longitudinal direction of the bed, and the air conditioner extends the interior of the cover along the ceiling to process the air. A second blowing duct that blows out from above the machine is connected.

  In the present invention, the bed is formed with a plurality of cast spaces extending in the longitudinal direction of the bed, and the partition wall partitioning the cast space has a cast hole communicating the adjacent cast spaces with each other. Are preferably arranged in the longitudinal direction of the bed.

  According to the present invention, since the temperature of the entire bed can be controlled uniformly and stably, the entire machine including the heat generating part and the non-heated part of the machine can be well balanced and stable temperature management becomes possible. The temperature environment can be kept constant, the temperature difference between the inside and outside of the machine can be reduced, and it can contribute to the improvement of the processing accuracy of ultra-precision processing.

The front view which shows one Embodiment of the temperature control apparatus of the ultraprecision machine by this invention. The top view of the temperature control apparatus of the ultraprecision processing machine by the embodiment. Sectional drawing which shows the blowing condition state of the air by the temperature control apparatus of the embodiment. The front view which shows the blowing condition state of the air by the temperature control apparatus of the embodiment.

Hereinafter, an embodiment of a temperature control device for a precision machine according to the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a front view of a roll lathe to which a temperature control apparatus according to the present invention is applied, and FIG. 2 is a plan view of the roll lathe. 1 and 2, reference numeral 24 indicates a roll lathe.

  First, the roll lathe 24 will be described. A spindle stock 27 and a tailstock 28 are installed on the bed 10, and the roll 30 is rotatably supported by the spindle stock 27 and the tailstock 28.

  As shown in FIG. 1, a pair of tables 32, 32 are installed on the bed 10, and the tables 32 can move in a direction perpendicular to the longitudinal direction of the bed 10.

  In the roll lathe 24 of this embodiment, an air slide device 40 that causes the tool post to travel by driving a linear motor is mounted on the tables 32 and 32.

  A guide rail 41 having a T-shaped cross section is supported on the table 32 in parallel with the roll 30 via a rail receiver 33. An air slider 42 is fitted to the guide rail 41 and travels along the guide rail 41 in a floating state by a linear motor. The air slider 42 also serves as a tool post, and a cutting tool for cutting the roll 30 is attached to the air slider 42. In the roll lathe 24, the side on which the air slide device 40 is disposed is the front side.

  Next, as shown in FIGS. 1 and 2, the roll lathe 24 of the present embodiment is accommodated in a machine cover 66, and is surrounded by the machine cover 66 during the processing. .

  The machine cover 66 is divided into two parts: a front cover 67 that covers the roll lathe 24 from the front side, and a rear cover 68 that covers the roll lathe 24 from the back side. As shown in FIG. 3, a door 69 is attached to the front surface of the front cover 67 in a sliding door manner. The front cover 67 and the rear cover 68 constitute a closed cover.

  In this embodiment, an air conditioner 70 that sends air that has been conditioned and air-conditions the inside of the machine cover 66 is installed outside the machine cover 66. The air conditioner 70 includes an air outlet 72 that blows air into the machine cover 66 and a suction port 74 that sucks air inside the machine cover 66, and air is provided between the air conditioner 70 and the machine cover 66. It comes to circulate.

  A first distribution duct 75 for distributing air is connected to the air outlet 72 of the air conditioner 70. A second distribution duct 76 is installed at the opposite end of the bed 10 so as to form a pair with the first distribution duct 75. Among these, to the 1st distribution duct 75, while connecting the end of two 1st blowing ducts 77a and 77b extended in the longitudinal direction of the bed 10, the end of the connection duct 78 is connected. A second distribution duct 76 is connected to the other end of the connection duct 78. The second distribution duct 76 is connected to the other ends of the first outlet ducts 77a and 77b. Therefore, the air blown from the air outlet 72 of the air conditioner 70 is distributed to the first air outlet ducts 77a and 77b and the connection duct 78 by the first distribution duct 75, and the air passing through the connection duct 78 is The two distribution ducts 76 are sent to the first outlet ducts 77a and 77b. In this way, air is sent from both ends to the first blowing ducts 77a and 77b. The first blow-out ducts 77a and 77b have a number of small holes for blowing air (not shown), and air is blown out through the small holes for blowing air.

  In this embodiment, in addition to the first blowing ducts 77a and 77b, a second blowing duct 80 extending in the longitudinal direction along the ceiling of the machine cover 66 is provided. A device 70 is connected. A number of small holes for air blowing are also formed in the second blowing duct.

As shown in FIG. 3, the first blow-out ducts 77 a and 77 b rationally utilize the cast structure unique to the bed 10.
That is, since the bed 10 is made of a casting, the bed 10 has a cast structure in which a plurality of spaces are partitioned by partition walls in order to reduce material and weight. In this bed 10, as shown in FIG. 3, for example, spaces 81 to 85 are partitioned. Each of these spaces 81 to 85 is a space extending in the longitudinal direction of the bed 10. Of the two first outlet ducts 77 a and 77 b, one first outlet duct 77 a is accommodated in the space 82, and the other first outlet duct 77 b is accommodated in the space 84.

  The partition walls that partition these spaces 81 to 85 are formed with cast holes, and the adjacent spaces communicate with each other through the cast holes. For example, the space 82 in which the first blowout duct 77a is inserted communicates with the adjacent spaces 81 and 83 through the punched holes 86 and 87, respectively. A plurality of these holed holes 86 and 87 are formed at regular intervals in the longitudinal direction of the bed 10. Further, among the partition walls that define the space 84 that accommodates the first blow-out duct 77b, a cast hole 88 is formed in the upper wall and is opened to the outside of the bed 10.

The temperature control device for the ultraprecision machine according to the present embodiment is configured as described above. Next, its operation and effect will be described.
As shown in FIGS. 3 and 4, the roll is processed while the rear cover 68 and the front cover 67 are integrated and the mechanical cover 66 is closed. During the roll processing, the inside of the machine cover 66 is cut off from the outside air.

  During processing, air sent from the air conditioner 70 is sent from both ends of the first outlet ducts 77a and 77b from the first distribution duct 75 and the second distribution duct 76, respectively, and as shown by arrows, Thus, the air is blown out from the small holes to the spaces 81 to 85 inside the bed. In addition, by sending air from both ends of the first blowing ducts 77a and 77b, it is possible to eliminate unevenness due to pressure loss and uniformly disperse the air as a whole.

  At the same time, the temperature-controlled air is blown out toward the roll lathe from the air blowing hole of the second blowing duct 80 disposed on the machine.

  According to the temperature control apparatus of the present embodiment, the cast structure of the cast bed 10 is originally used for temperature management reasonably, so that the bed 10 is particularly modified for piping the duct. There is no need, and the first outlet ducts 77a and 77b can be disposed inside the bed 10. In addition, the air blown out from the first blow-out ducts 77a and 77b spreads all over the spaces 81 to 85 inside the bed 10 and keeps the temperature of the bed 10 uniformly and stably as a whole without deviating from the heat generation part. be able to.

  Moreover, in order to keep the temperature of the bed 10 uniform as a whole, in this embodiment, the two first blowout ducts 77a and 77b are inserted, but the spaces 81 to 85 have the cast holes 86 and 87, respectively. Because it communicates through the air, it is possible to send air evenly with a small number of ducts.

  Also, a second blowout duct 80 is provided on the ceiling so that air is blown out from the machine so that the temperature difference between the inside and outside of the roll lathe is as small as possible. The temperature environment inside the machine cover can be kept constant.

  In the case of a roll lathe that performs ultra-precise machining, even slight temperature fluctuations affect machining accuracy, so when the temperature environment changes, it is necessary to pause machining until the temperature stabilizes. According to such a temperature control device, since the temperature environment can be stably maintained, it is possible to contribute to the improvement of processing accuracy and processing efficiency of ultra-precision processing.

  As mentioned above, although the preferred embodiment was described and demonstrated about the temperature control apparatus of the ultraprecision processing machine by this invention, as a precision processing machine, of course, it can apply also to precision processing machines other than a roll lathe. .

DESCRIPTION OF SYMBOLS 10 ... Bed, 24 ... Roll lathe, 27 ... Spindle head, 28 ... Tailstock, 42 ... Air slider, 66 ... Machine cover, 70 ... Air conditioner, 72 ... Air outlet, 75 ... First distribution duct, 76 ... First 2 distribution ducts, 77a, 77b ... first outlet duct, 78 ... connection duct, 80 ... second outlet duct

Claims (6)

A temperature control device for a precision processing machine having a bed in which a cast-out space is partitioned, and accommodating the entire precision processing machine inside a cover,
An air outlet duct having an air outlet having an air outlet for blowing air into the cover and an air inlet for sucking air inside the cover is disposed outside the cover, and penetrates the bed through the casting space of the bed. A temperature control device for a precision processing machine, wherein the temperature control device is connected to the air conditioner. The air blowing duct includes a first blowing duct that penetrates a casting space of the bed,
A first distribution duct that is provided on one end of the bed and is connected to the outlet and distributes air to one end of the first outlet duct;
A second distribution duct disposed on the other end of the bed and distributing air to the other end of the first outlet duct;
The temperature control device for a precision processing machine according to claim 1, comprising a connecting duct that connects the first distribution duct and the second distribution duct to each other.   The temperature control device for a precision processing machine according to claim 2, wherein the first blowout duct includes a plurality of blowout ducts extending in parallel with the longitudinal direction of the bed.   2. The precision processing machine according to claim 1, wherein the air conditioner is connected to a second blowout duct that extends along the ceiling of the cover and blows air out of the machine. Temperature control device.   The bed has a plurality of cast spaces extending in the longitudinal direction of the bed, and the partition walls that partition the cast spaces have cast holes that communicate between the adjacent cast spaces in the bed longitudinal direction. The temperature control device for a precision processing machine according to claim 2, wherein the temperature control device is used.   The precision processing machine is a roll lathe provided with a headstock and a tailstock for rotatably supporting a roll on a bed and provided with a tool post mounted on the bed. The temperature control device for a precision processing machine according to any one of items 5 to 5.

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