JP2022114153A - Cooling device - Google Patents

Abstract

To provide a cooling device that can efficiently cool a high-temperature cylindrical workpiece.SOLUTION: A cooling device 9 according to the present invention that cools a workpiece by bringing a pair of relatively low-temperature heat receiving blocks 11 and 12 into contact with the outer peripheral surface of a relatively high-temperature cylindrical workpiece 7 includes a pair of heat receiving blocks 11 and 12 and a pair of drive mechanisms 31 and 32. The pair of heat receiving blocks 11 and 12 are opposed to each other in the movement direction orthogonal to the axis of the workpiece 7, and have a plurality of heat receiving portions H capable of contacting the outer peripheral surface of the workpiece 7, and the plurality of heat receiving portions have a semi-cylindrical shape as a whole. The pair of drive mechanisms 31 and 32 reciprocate the pair of heat receiving blocks 11 and 12 between a contact position in contact with the workpiece 7 and a spaced position away from the workpiece 7. Each of the heat receiving blocks 11 and 12 has a plurality of heat-receiving fins, the tips of the heat-receiving fins are respectively the heat receiving portions 11 and 12, and the heat-receiving fins are separated from each other by slits.SELECTED DRAWING: Figure 1

Description

The present invention relates to cooling devices.

Conventionally, there has been known a cooling device that cools a work by bringing a heat receiving body into contact with the work at a high temperature.

For example, in Patent Document 1, the structure of the thermally conductive contact that thermally connects between the LSI and the cover and the cooling fins or slits of the cover in contact with this is made into a cell structure for each contact, and the ribs extending over the entire length of the cover are used. and improve heat transfer characteristics to the outside of the module.

JP-A-7-38020

The above document discloses a type of module in which an LSI mounted on a substrate is covered with a cover and heat generated by the LSI is released to the outside of the module through the cover. However, due to its structure, this module cannot be applied to cylindrical workpieces that do not have a flat surface, such as LSIs.

SUMMARY OF THE INVENTION The present invention has been created in view of the above points, and an object thereof is to provide a cooling device capable of efficiently cooling a cylindrical work.

A cooling device (9) for cooling a relatively hot cylindrical work (7) by bringing a pair of relatively low temperature heat receiving blocks (11, 12) into contact with the outer peripheral surface of the work (7). It comprises heat receiving blocks (11, 12) and a pair of driving devices (31, 32).

The pair of heat-receiving blocks have a plurality of heat-receiving parts (H) that face each other in the movement direction orthogonal to the axis of the work and can contact the outer peripheral surface of the work, and have a cross section orthogonal to the axis of the work. A curved line connecting the tips of the plurality of heat receiving portions forms an arc.

The pair of drive mechanisms reciprocate the pair of heat receiving blocks between a contact position in contact with the work and a spaced position away from the work.

Each heat-receiving block has a plurality of heat-receiving fins (F) separated by slits (S) extending in a direction orthogonal to the movement direction, and the tip of each heat-receiving fin constitutes the heat-receiving portion.

When the pair of heat-receiving blocks sandwich the work, the heat-receiving fins are elastically bent, and the heat-receiving portion is pressed against the work.

As a result, each heat-receiving portion reliably contacts the outer peripheral surface of the cylindrical work, thereby increasing the contact area and efficiently receiving the heat of the work, thereby lowering the work temperature.

BRIEF DESCRIPTION OF THE DRAWINGS The perspective view which shows 1st Embodiment of the cooling device of this invention. FIG. 2 is a perspective view of the workpiece shown in FIG. 1 sandwiched by a cooling device; FIG. 3 is a front view of the heat-receiving block in FIG. 2 showing (a) a position separated from the work and (b) a position in contact with the work; The front view which shows the heat-receiving block of 2nd Embodiment, and the air-cooling part of a support block. FIG. 5 is a perspective view showing the support block of FIG. 4; FIG. 11 is a front cross-sectional view showing water-cooled portions of a heat-receiving block and a support block according to the second embodiment; FIG. 11 is a front cross-sectional view showing a heat receiving block and a temperature control type support block according to a third embodiment;

Cooling devices according to multiple embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
[Object to be cooled]
First, an object to be cooled according to the present invention will be described. FIG. 1 shows a schematic diagram of a workpiece 7 which is an object to be cooled. The workpiece 7 is cylindrical. In addition, a cylindrical surface including a groove or a dent in a part thereof is also treated as a cylindrical shape. Such a cylindrical surface is difficult to cool by bringing a planar heat-receiving body into surface contact with the surface.

[Cooling system]
FIG. 1 shows an overview of the first embodiment. The cooling device 9 of the present embodiment is a device that cools the work by bringing a pair of relatively low-temperature heat receiving blocks 11 and 12 into contact with the outer peripheral surface of the relatively high-temperature cylindrical work 7 . heat receiving blocks 11 and 12 and a pair of drive mechanisms 31 and 32 . In the configuration example shown in FIG. 1, the pair of drive mechanisms 31 and 32 operate vertically, and the pair of heat receiving blocks 11 and 12 sandwich the workpiece 7 from above and below.

The pair of heat receiving blocks 11 and 12 are opposed to each other in the movement direction perpendicular to the axis of the work 7 and have a plurality of heat receiving portions H capable of contacting the outer peripheral surface of the work 7. Cylindrical. A pair of drive mechanisms 31 and 32 reciprocate the pair of heat receiving blocks 11 and 12 between a contact position in contact with the work 7 and a spaced position away from the work 7 . In this embodiment, the pair of drive mechanisms 31 and 32 are driven by hydraulic cylinders.

Please refer to FIG. Each heat-receiving block 11, 12 has a plurality of heat-receiving fins F, the tip of each heat-receiving fin F is a heat-receiving portion H, and the heat-receiving fins F are separated by slits S, respectively. The heat-receiving portion H at the tip of the heat-receiving fins F contacts the work 7 and bends like a leaf spring to generate an elastic force, which urges the heat-receiving portion H to press it against the outer surface of the work 7 .

[Operation of cooling device]
The operation of the cooling device 9 will be described with reference to FIGS. 2 and 3. FIG. FIG. 3(a) shows a pair of heat receiving blocks 11 and 12 at a separated position before sandwiching the workpiece 7. As shown in FIG. In this embodiment, the heat-receiving block is composed of two left and right components.

The heat receiving block 11 is driven by the drive mechanism 31 to move in the downward direction D1, and the heat receiving block 12 is driven by the drive mechanism 32 to move upward with respect to the high-temperature work 7 fixed to the work fixing jig 8 (FIG. 2). By proceeding to D2 (the cooling device 9 and the drive mechanisms 31 and 32 are shown in FIG. 1), the high-temperature workpiece 7 is sandwiched between the pair of heat receiving blocks 11 and 12 . FIG. 3(b) schematically shows a pair of heat receiving blocks 11 and 12 at the contact position holding the workpiece 7. As shown in FIG.

When the pair of heat receiving blocks 11 and 12 holding the high-temperature work 7 receives heat from the work 7 (hereinafter also referred to as "heat receiving"), the heat receiving block 11 is driven by the driving mechanism 31 to advance in the upward direction D2 to receive the heat. The block 12 is driven by the drive mechanism 32 to move downward in the direction D1, whereby the pair of heat receiving blocks 11 and 12 return to the initial separated position (FIG. 3(a)), and heat received from the work 7 (hereinafter referred to as "heat ) to dissipate heat. When the temperature of the pair of heat receiving blocks 11 and 12 drops, they wait until the process of receiving heat again.

Here, when the workpiece 7 and the pair of heat receiving blocks 11 and 12 that are in contact with each other are regarded as one object, the heat transfer in this object is expressed by the theoretical formula 1. In the formula, Q is the amount of conductive heat transfer (W, J/s), λ is the thermal conductivity (W/m K), T1 is the high temperature _side temperature (°C), T2 is the low temperature _side temperature (°C), d indicates the conduction distance (m), and S indicates the cross-sectional area (m ² ).
(Theoretical formula 1) Q = λ/d × (T ₁ - T ₂ ) × S

Looking at the relationship between the amount of conductive heat transfer Q and the cross-sectional area S (that is, the contact area) based on theoretical formula 1, it can be seen that Q is proportional to S when other parameters are constant. This indicates that it is necessary to increase the contact area for efficient heat conduction, and conversely, it also indicates that the larger the contact area, the better the heat dissipation. In view of this principle, it is an object of the present invention to increase the contact area between the workpiece 7 and the heat receiving portion H as much as possible.

[Effect of the first embodiment]
With the above configuration, the heat-receiving portion H is in contact with various parts of the surface of the workpiece 7 more reliably even for a cylindrical workpiece that cannot be cooled well by a cooling device for workpieces having a flat portion because the outer shape is composed of a curved surface. and increase the contact area. As a result, the heat accumulated in the high-temperature work efficiently moves from the heat receiving portion H to the heat receiving blocks 11 and 12 through the heat receiving fins F due to heat conduction through the contact points between the work 7 and the heat receiving portion H, Work 7 is relatively cooled.

(Second embodiment)
Next, a second embodiment will be described with reference to FIGS. 4 and 5. FIG. Although it has almost the same configuration as the first embodiment, an air cooling section 41 or a water cooling section 42, which is a mechanism for efficiently releasing the heat received from the workpiece 7 to the support block 21 to which the heat receiving block 11 is attached, is provided. are installed in different places.

[Air cooling section]
FIG. 4 shows a front view of the air cooling section 41, and FIG. 5 shows a perspective view of the air cooling section 41. As shown in FIG. Here, only the upper structure of the cooling device 9 in FIG. 1 is shown. The air cooling part 41 has a large number of slits formed in the support block 21 to increase the contact area with the blown air in order to enhance the cooling effect of the blow in the process of dissipating the heat received from the work 7 at the spaced position. .

As shown in FIG. 5, the air-cooling unit 41 of the present embodiment has a dead end in the middle of the support block 21. When the air-cooling unit 41 blows in the blow direction DB so that the air flows parallel to the slits of the air-cooling unit 41, Efficiently receives heat at dead-end points and is swept upwards to release heat. According to a trial calculation with the support block 21 having certain design specifications, it is possible to dissipate heat of about 30 kJ in 50 seconds by blowing the slit portion in FIGS. 4 and 5 vertically at 10 meters per second.

[Water cooling part]
FIG. 6 shows a front cross-sectional view of the water cooling section 42. As shown in FIG. Here, a cooling water flow path is formed vertically, and a cross-sectional view taken along a plane passing through the flow path is shown. According to a trial calculation using the support block 21 having the same design specifications as above, when the water cooling section 42 shown in FIG.

[Effect of Second Embodiment]
With this configuration, the heat received from the workpiece can be released more efficiently from the heat receiving block to the support block and further to the outside thereof. As a result, the time required for the heat dissipation process is shortened, and work efficiency is improved.

(Third embodiment)
Next, with reference to FIG. 7, a third embodiment will be described. Although the configuration is substantially the same as that of the second embodiment, the difference is that the support block 21 to which the heat receiving block 11 is attached is provided with heaters 51 and 52 instead of the air cooling section 41 and the water cooling section 42 . In this embodiment, a temperature sensor 6 for monitoring the temperature of the bottom of the support block 21 is also installed.

[Effect of the third embodiment]
With the above configuration, the temperature of the support block 21 and the heat receiving block 11 can be adjusted within a range in which the workpiece temperature variation does not exceed ±50°C. This embodiment is particularly effective when, for example, it is necessary to consider the material properties of the high-temperature work 7 and use multiple cooling steps to sequentially cool the work 7 while keeping the work temperature within the range of ±50 ° C. is.

(Other embodiments)
In the above embodiment, a pair of heat-receiving blocks are driven by a pair of driving devices to sandwich the workpiece from above and below. However, the sandwiching method of the present invention is not limited to this. For example, it may be a mechanism that sandwiches the workpiece from the left and right depending on conditions such as work connectivity and space constraints in the preceding and following processes. In that case, the slits in the heat receiving block are formed in the vertical direction, and when the heat receiving block sandwiches the work from the left and right, the heat receiving fins turn left and right and come into contact with the outer peripheral surface of the work.

Alternatively, a pair of heat-receiving blocks may be attached to the robot arms, respectively, and the robot arms may sandwich the workpiece.

In other embodiments, the pair of drive devices is not limited to hydraulic cylinders or pneumatic cylinders, and other drive devices may be used.

Although the air-cooling part of the second embodiment has a slit shape with a dead-end structure, the air-cooling part may have any shape suitable for efficient blow cooling. For example, it may not have a dead-end structure, or may have a structure in which a large number of ventilation holes are provided instead of slits.

The coolant passed through the water cooling section of the second embodiment may be any fluid. For example, water may not be used, and a special gas with high thermal conductivity may be used instead of the liquid. Also, the direction DW in which the cooling water flows is not limited to the illustrated one, and the cooling water may flow in the direction opposite to that shown in FIG.

Furthermore, the shape of the flow path can also be appropriately designed as needed. For example, it may be a complicated flow path in which two spiral slope-like spaces are connected.

The third embodiment can be provided with an air cooling section and a water cooling section as in the second embodiment. Thereby, the temperature control of the support block can be performed more flexibly.

As described above, the present invention is not limited to the above embodiments, and can be implemented in various forms without departing from the scope of the present invention.

11, 12 heat receiving block, 31, 32 drive device, 7 workpiece D1 descending direction, D2 ascending direction, F heat receiving fin, H heat receiving part, S slit

Claims (3)

A cooling device (9) for cooling a relatively high temperature cylindrical work (7) by bringing a pair of relatively low temperature heat receiving blocks (11, 12) into contact with the outer peripheral surface of the work (7),
A plurality of heat-receiving parts (H) facing each other in an operation direction orthogonal to the axis of the work and capable of contacting the outer peripheral surface of the work, and tips of the plurality of heat-receiving parts in a cross section orthogonal to the axis of the work the pair of heat-receiving blocks having an arcuate curve connecting the
a pair of drive mechanisms (31, 32) for reciprocating the pair of heat receiving blocks between a contact position in contact with the work and a spaced position away from the work;
with
Each of the heat receiving blocks has a plurality of heat receiving fins (F) separated by slits (S) extending in a direction perpendicular to the movement direction, and the tip of each of the heat receiving fins constitutes the heat receiving portion,
A cooling device in which, when the pair of heat receiving blocks sandwich the work, the heat receiving fins are elastically bent, and the heat receiving portion is pressed against the work. 2. The cooling device according to claim 1, wherein said heat receiving block is air-cooled or water-cooled by moving to said separated position so as to radiate heat received from said work. 3. The cooling device according to claim 1 or 2, wherein heaters (51, 52) are installed in said heat-receiving block and the temperature thereof is controlled within a predetermined temperature range.

Images