JP2016047579A - Transformer for machine tool and machine tool provided with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a voltage transformer and a machine tool having the same in which a transformer can be sufficiently cooled when it is mounted to the machine tool.SOLUTION: A voltage transformer 20 is mounted to a machine tool having an air blowing mechanism that generates airflow for cooling a heat source. The voltage transformer comprises a transformer 30 and a body 21 in which the transformer 30 is stored. The body 21 comprises: a connection part 29 connected to a flow channel of the airflow after cooling, which is generated by the air blowing mechanism; an intake port 26a formed in a side plate 26, where the connection part 29 is provided, to take the airflow after cooling to the inside; and an exhaust port 23a provided in a bottom plate 23 and formed so as to exhaust the airflow taken from the intake port 26a through the flow channel which is in contact with the transformer 30.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a transformer device including a transformer, and relates to a transformer device used by being attached to a machine tool, and a machine tool including the transformer device.

  In general, machine tools are used in various countries around the world, and the voltage of commercial power supplied varies depending on the circumstances in each country of use. For this reason, conventionally, in order to cope with different commercial power, a transformer is attached to the machine tool, and after the supplied commercial power is transformed to a standard voltage set by the machine tool manufacturer by this transformer, the spindle motor It is designed to be supplied to electrical products and electrical circuits.

  However, this transformer device generates a large amount of heat when it is operated, and when the heat generated by the transformer device is transmitted to the machine tool, it causes thermal displacement in each part of the machine tool, resulting in deterioration of machining accuracy. .

  Therefore, conventionally, a machine tool has been proposed in which the transformer is attached via a heat insulating material (see Patent Document 1). According to this machine tool, the heat generated in the transformer device is blocked from being propagated to the machine tool by the heat insulating material, so that it is considered that the thermal displacement of the machine tool due to the heat generated by the transformer device is less likely to occur.

JP 2000-317749 A

  By the way, generally, the life of the transformer is shortened as the temperature during operation is higher, whereas the margin and durability against the limit value are dramatically improved as the temperature during operation is lower. It has been known. Therefore, in order to extend the life of the transformer and increase the margin with respect to the limit value, it is necessary to cool the transformer during operation and maintain the temperature low.

  However, the conventional machine tool described above has a problem that the transformer cannot be sufficiently cooled. In this machine tool, fins are formed on the heat insulating material, and the fins are used to increase the heat dissipation from the heat insulating material. However, the natural transformer alone cannot sufficiently cool the transformer.

  The present invention has been made in view of the above circumstances, and provides a transformer device capable of sufficiently cooling a transformer when attached to a machine tool, and a machine tool including the transformer device. Objective.

The present invention for solving the above problems is a transformer device attached to a machine tool provided with a blower mechanism for generating an air flow for cooling a heat source,
A transformer and a housing in which the transformer is housed,
The housing includes a connection portion for connecting to a flow path of the air flow after the cooling operation generated by the air blowing mechanism, and the component member of the housing provided with the connection portion is provided with a member after the cooling operation. An intake port formed for taking an air flow into the interior; and an exhaust port formed so that the air flow taken in from the intake port is exhausted through a flow path in contact with the transformer. The present invention relates to a machine tool transformer provided in any one of the above-described components, and a machine tool including the same.

  The machine tool transformer is used by being attached to the machine tool so that the connecting portion of the housing is connected to the airflow passage after the cooling action generated by the blower mechanism. Then, when the machine tool transformer is attached in this way, the air flow after the cooling action is taken in from the intake port, and is discharged from the exhaust port through the flow path in contact with the transformer. Thus, the air flow after the cooling action comes into contact with the transformer, i.e., the transformer is exposed to the air flow after the cooling action, so that heat exchange takes place between them. Is done. The air flow after cooling a general heat source of a machine tool, that is, the air flow generated by the blowing mechanism, and the temperature of the air flow after heat exchange with the heat source is variable. The temperature of the transformer is sufficiently lower than the temperature of the transformer, and it is possible to sufficiently cool the transformer by the air flow after this cooling action.

  As described above, in the machine tool transformer according to the present invention, the transformer is sufficiently cooled during use, thereby extending its life and improving the margin with respect to the limit value. Further, since the transformer can be cooled by using the air flow after the cooling action of the air blowing mechanism provided in the machine tool, that is, exhaust, no special device or mechanism for cooling the transformer is required. The transformer can be cooled without any energy costs.

  In the present invention, the casing is arranged in parallel with the component member on the inner side of the component member provided with the connection portion, and an air flow taken from the intake port is connected to the component member. An inner wall may be provided so as to circulate through the space between them and to flow into the internal space.

  According to this configuration, the internal space in which the transformer is disposed and the machine tool are separated from each other by the space (isolation space) formed between the component member provided with the connection portion and the inner wall. As a result, the heat of the transformer is transmitted to the machine tool by the isolated space, thereby preventing the machine tool from being affected by the heat.

  In the present invention, it is preferable that the connecting portion is configured to be connectable to an opening formed in the machine tool in order to exhaust the airflow after the cooling action generated by the blower mechanism. If it does in this way, the air flow exhausted from the said opening part can be taken in into a housing | casing efficiently, and a transformer can be cooled more effectively.

  As described above, according to the transformer device for machine tools and the machine tool equipped with the same according to the present invention, the transformer can be sufficiently cooled without incurring any energy cost, and the service life thereof can be extended. Further, the margin with respect to the limit value can be improved.

  Further, if an inner wall is arranged in parallel with a gap from this component member inside the component member provided with the connection part of the housing, the work is insulated by the heat insulating action of the isolation space formed between the component member and the inner wall. It is possible to prevent the machine from being affected by heat from the transformer.

It is sectional drawing which looked at the machine tool which concerns on one Embodiment of this invention from back, and is sectional drawing of the arrow CC direction in FIG.2 and FIG.3. It is sectional drawing of the arrow AA direction in FIG. It is sectional drawing of the arrow BB direction in FIG. FIG. 4 is a cross-sectional view showing the transformer device according to the present embodiment, and is an enlarged cross-sectional view showing the transformer device in FIG. 3. It is sectional drawing which showed the transformer apparatus which concerns on other embodiment of this invention.

  Hereinafter, specific embodiments of the present invention will be described with reference to FIGS.

  As shown in FIGS. 1 to 3, the machine tool 1 of the present example includes a bed 2, a cover body 8 that covers the bed 2 and a processing region 7 formed on the bed 2, and the cover body 8. Furthermore, the cover body 9 which covers an outer area | region, and the transformation apparatus 20 and the air blower 10 which are arrange | positioned in the space between the cover body 9 and the cover body 8 are provided.

  The bed 2 has a space 3 formed therein, and is provided with an air supply hole 4 and an exhaust hole 6 that communicate with the space 3 and open on the rear side surface of the bed 2. The air supply hole 4 and the exhaust hole 6 are provided at an appropriate interval in the longitudinal direction of the bed 2, and the cover body 8 is formed with a through hole 8 a at a position corresponding to the air supply hole 4. A through hole 8 b is formed at a position corresponding to 6. Before and after the machine tool 1, the right side in FIGS. 2 and 3 is the front and the left side is the rear.

  The blower 10 is connected to the through hole 8a, and the outside air is sent into the space 3 of the bed 2 through the through hole 8a and the air supply hole 4, and the fed air flows through the space 3, The air is exhausted from the exhaust hole 6 and the through hole 8b. Thus, an air flow that flows in the space 3 of the bed 2 is generated by the blower 10, and the bed 2 is cooled by heat exchange with the air flow.

  A heat source such as a spindle motor or a feed motor is disposed on the bed 2, and heat is generated in the processing region 7 by the processing to be performed. Therefore, the bed 2 is thermally displaced by these heat sources and processing heat. However, by cooling the bed 2 with the air flow from the blower 10, the thermal displacement of the bed 2 can be suppressed, and the processing accuracy is improved by the thermal displacement of the bed 2. Deterioration can be suppressed.

  Although not particularly shown in FIGS. 1 to 3, an appropriate movement mechanism such as a spindle or a feeding device is disposed in the machining region 7, and a workpiece is machined by the operation of these movement mechanisms. .

  The transformer device 20 includes a plurality (three in this example) of transformers 30 and a casing 21 in which the transformers 30 are housed. As shown in FIG. 4, the casing 21 includes a front side plate 26, a rear side plate 27, an upper plate 22, a bottom plate 23, and left and right side plates 24 and 25 as viewed from the rear. The transformer 30 is disposed in an internal space 28 that has a rectangular parallelepiped shape and is surrounded by the top plate 22, the bottom plate 23, and the side plates 24, 25, 26, and 27. In FIG. 4, reference numeral 30 a is a coil of the transformer 30.

  The top plate 22, the bottom plate 23, and the left and right side plates 24, 25 extend to the cover body 8 side from the front side plate 26, respectively, and the casing 21 has an end portion of the extension portion. While being in contact with the cover body 8 so as to surround the through-hole 8b, it is detachably fixed to the cover body 9 and / or the cover body 8 by an appropriate fixture. Thus, the extension portions of the upper plate 22, the bottom plate 23, and the left and right side plates 24, 25 constitute a connection portion 29 that is connected to the air flow exhausted through the exhaust hole 6 and the through hole 8b. The air flow exhausted through the exhaust hole 6 and the through hole 8b flows into the space 29a of the connection part 29 formed by the extension part.

  Further, a through hole 26 a is formed in the front side plate 26, and this through hole 26 a serves as an inlet for introducing the air flow flowing into the space 29 a of the connection portion 29 into the internal space 28. Function. On the other hand, through holes 23a and 9a are respectively formed in the bottom plate 23 and the cover body 9 which are below the coil 30a of the transformer 30, and these through holes 23a and 9a are connected to the internal space from the through hole 26a. 28 functions as an exhaust port through which the airflow flowing into the airflow 28 is exhausted, and the positional relationship between the through hole 26a and the through holes 23a and 9a is such that the airflow flowing from the through hole 26a is the transformer 30 (particularly The positional relationship is such that the air is exhausted from the through-holes 23a and 9a through the flow path in contact with the coil 30a). The through holes 23a and 9a may be provided in two rows in front and rear, so as to individually correspond to the coils 30a of the three transformers 30, or correspond to the three coils 30a. Thus, it may be two slit-shaped holes formed in the front and rear.

  According to the machine tool 1 of the present example having the above configuration, outside air is sent from the blower 10 into the space 3 of the bed 2 through the through hole 8a and the air supply hole 4, and the sent air is It flows through the space 3 and flows into the connection part 29 of the transformer 20 from the exhaust hole 6 and the through hole 8b.

  Thus, the bed 2 is cooled by the air flow flowing through the space 3 of the bed 2, whereby the thermal displacement of the bed 2 is suppressed, and the processing accuracy deteriorates due to the thermal displacement of the bed 2. It is suppressed.

  The air flow (air flow after cooling action) that flows into the connection portion 29 of the transformer device 20 further flows into the internal space 28 through the through hole 26a, and then contacts the transformer 30. Through the through-holes 23a and 9a. Thus, the air flow after the cooling action comes into contact with the transformer 30, that is, the transformer 30 is exposed to the air flow after the cooling action, whereby heat exchange is performed between the two. 30 is cooled. In addition, the temperature of the air flow after cooling the bed 2 is sufficiently lower than the temperature of the transformer 30, and the transformer 30 can be sufficiently cooled by this air flow.

  Further, since the connecting portion 29 is connected to the through hole 8b through which the cooled air is exhausted, all the air flow exhausted from the through hole 8b passes through the connecting portion 29 to the internal space 28. The transformer 30 can be effectively cooled down.

  Further, the internal space 28 in which the transformer 30 is disposed and the bed 2 of the machine tool 1 are separated by a space 29a between the cover body 8 and the side plate 26, and this space 29a exhibits a heat insulating action. The heat of the vessel 30 is propagated to the bed 2 by the space 29 a, thereby preventing the bed 2 from being affected by heat from the transformer 30.

  Thus, in the machine tool 1 of the present example, the transformer 30 can be sufficiently cooled, and it is possible to extend its life and improve the margin with respect to the limit value. Moreover, since the transformer 30 can be cooled using the air flow after the cooling action of the blower 10 provided in the machine tool 1, that is, the exhaust, a special device or mechanism for cooling the transformer 30 is provided. This is unnecessary and the transformer 30 can be cooled without any energy cost.

  As mentioned above, although one Embodiment of this invention was described, the aspect which this invention can take is not limited to this at all.

  For example, instead of the above-described transformer device 20, the transformer device 40 shown in FIG. 5 may be provided. The transformer device 40 has an inner wall 43 arranged in parallel with a space from the side plate 42 inside the side plate 42 on the front side of the casing 41, and a through hole 43a is formed in the inner wall 43. Is the same as the transformer 20 in the above example. Therefore, in FIG. 5, the same code | symbol is attached | subjected about the same component as the transformation device 20 of the above example. Note that a through hole 42 a is formed in the side plate 42.

  According to this transformer device 40, the air flow exhausted from the exhaust hole 6 and the through hole 8 b and flowing into the connection portion 29 is transferred between the side plate 42 and the inner wall 43 from the through hole 42 a formed in the side plate 42. And flows into the space 44 between them, and then flows into the internal space 28 from the through-hole 43a formed in the inner wall 43, and then passes through the flow path in contact with the transformer 30. It is discharged from the through holes 23a and 9a. Thus, the transformer 30 is also cooled by the transformer 40 when the airflow after the cooling action comes into contact with the transformer 30.

  Further, in this transformer device 40, the internal space 28 in which the transformer 30 is disposed and the bed 2 of the machine tool 1 include the side plate 42 and the inner wall 43 in addition to the space 29a between the cover body 8 and the side plate 42. The spaces 29a and 44 are also insulated by the space 44 between them, and the spaces 29a and 44 have a heat insulation function. Therefore, the heat of the transformer 30 is transmitted to the bed 2 by the spaces 29a and 44, 2 is more effectively prevented from being affected by heat from the transformer 30.

  In the above example, the transformer devices 20 and 40 are connected to the air flow that is supplied from the blower 10 and cooled after the bed 2 is cooled. However, the present invention is not limited to such a configuration. In general, the object to be cooled (heat source) in the machine tool 1 is not limited to the bed 2 in the above example, and a control device, hydraulic oil, and the like are also objects to be cooled, and these are also appropriately cooled by a blower. The transformer devices 20 and 40 according to the present invention can connect the connecting portion 29 to the air flow after cooling generated by the blower attached to the machine tool 1 as much as possible. The temperature of the air flow after the heat exchange with the heat source of the machine tool 1 (the air flow after the cooling action) is sufficiently lower than the temperature of the transformer 30, and the air flow after the cooling action causes the transformer 30 to It can be cooled sufficiently.

  In the above example, the connecting portion 29 is connected to the through hole 8b through which the air after cooling the bed 2 is exhausted. However, the present invention is not limited to this. It is only necessary that the exhaust air flow is arranged so as to face the exhaust air flow, and the exhaust air flow is arranged to flow into the connection portion 29. It is not limited to the above example.

  Moreover, in the transformer devices 20 and 40 in the above example, the transformer 30 may be installed in the casings 21 and 41 through an appropriate heat insulating material.

DESCRIPTION OF SYMBOLS 1 Machine tool 2 Bed 3 Space 4 Air supply hole 6 Exhaust hole 8, 9 Cover body 8a, 9a Through-hole 10 Blower 20 Transformer 21 Case 22 Upper plate 23 Bottom plate 23a Through-hole 24, 25, 26, 27 Side plate 26a Through-hole 28 Internal space 29 Connection

Claims (5)

A transformer device attached to a machine tool provided with a blower mechanism that generates an air flow for cooling a heat source,
A transformer and a housing in which the transformer is housed,
The housing includes a connection portion for connecting to a flow path of the air flow after the cooling operation generated by the air blowing mechanism, and the component member of the housing provided with the connection portion is provided with a member after the cooling operation. An intake port formed for taking an air flow into the interior; and an exhaust port formed so that the air flow taken in from the intake port is exhausted through a flow path in contact with the transformer. A transformer for machine tools, comprising any one of the constituent members.   The casing is arranged in parallel with the component member inside the component member provided with the connecting portion, and an air flow taken in from the intake port passes through the space between the component member. The transformer device for a machine tool according to claim 1, further comprising an inner wall arranged to circulate and flow into the internal space.   The said connection part is comprised so that connection to the opening part formed in the said machine tool is possible, in order to exhaust the air flow after the cooling action produced by the said ventilation mechanism. The machine tool transformer described. A machine tool having a blower mechanism that generates an air flow for cooling a heat source,
While comprising the transformer device according to claim 1 or 2,
A machine tool, wherein a connection portion of the transformer device is connected to a flow path of an air flow after cooling action generated by the blower mechanism. A machine tool including a blower mechanism that generates an air flow for cooling a heat source, and an opening for exhausting an air flow after cooling generated by the blower mechanism,
While comprising the transformer device according to claim 3,
A machine tool, wherein a connecting portion of the transformer is connected to the opening.

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