JPH0253484B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cooling water tank for heat treatment that is particularly suitable for cooling long articles.

First, a description will be given of the long articles to be cooled by the heat treatment cooling water tank of the present invention. Examples of such articles include U-shaped tubes used in air-conditioning equipment. This U-shaped tube is manufactured by bending a pipe into a U-shape, heating the bent portion to remove internal stress, and rapidly cooling the heated bent portion.

By the way, when cooling the bent part of a U-shaped tube like the one above, the bent part of the U-shaped tube is immersed in a cooling water tank. There are two possible ways to do this: One method is to rotate the U-shaped tube and immerse its bent portion into the cooling water tank. Another method is to stand the U-shaped tube in advance with the bent portion facing downward, and then immerse the bent portion into a cooling water tank.

However, in the former method, since the U-shaped tube is long, it takes time to rotate it.
For this reason, there is a problem that the uniformity of the material in the bent portion is impaired. Further, there is a problem in that a large work space is required to rotate a long object, and the building in which the cooling water tank is installed must be enlarged. On the other hand, in the latter method,
Since the U-shaped tube is set up in advance and immersed in the cooling water tank in that state, it is possible to shorten the cooling time and improve the material uniformity of the bent part, but it is difficult to rotate the U-shaped tube. This method is the same as the former method in that it requires a large amount of work space.

This invention was made in order to solve the above problems, and it is possible to shorten the cooling time and improve the material uniformity of the part to be cooled, and moreover, it is a heat treatment that does not require a large working space. The purpose is to provide a cooling water tank for

An embodiment of the present invention will be described below with reference to FIGS. 1 to 21. This embodiment is a U-shaped pipe manufacturing device using the cooling water tank according to the present invention, and in this device, everything from bending the pipe to heating and cooling the bent portion is performed in an integrated manner. ing.

First, the overall configuration of this manufacturing apparatus will be described. In the figure, reference numeral 1 is a stockyard. A roller conveyor 2 and an elevating roller conveyor 3 are installed along the length of the stockyard 1. Close to the lifting roller conveyor 3 and to its right (hereinafter, front, rear, left, and right refer to bottom, top, left, and right in FIG. 1 unless otherwise specified), there is a bending section. work table 4
is installed. A bending device 5 for bending the pipe P into a U-shape is installed on the bending table 4. Further, on the left side of the bending work table 4 and behind the lifting roller conveyor 3, a cutting machine 6, a chamfering machine 7, and an inspection table 8 are installed in this order. Furthermore, on the left side of the inspection table 8, there is an elevating roller conveyor 3.
Conveyors 9 and 10 are sequentially installed along the roller conveyor 2, and a cooling water tank 11 and a resistance heating machine 12 are sequentially installed on the left side of the conveyor 10. Further, a stock truck 13 that moves in the front-rear direction is installed below the conveyor 10, and completed U-shaped tubes U are loaded onto this stock truck 13.

Next, for each part of this manufacturing equipment having the overall configuration as described above, pipe P and U pipe Pu
This will be explained in detail along the flow.

As shown in FIG. 3, the stockyard 1 has a plurality of support plates 14 on its upper part that are sloped downward toward the roller conveyor 2 side. , thruster 15
is provided so as to be movable in a direction perpendicular to the support plate 14. This push rod 15 is configured to be moved up and down by a cylinder 16 via a link mechanism 17.

Then, when the push rod 15 moves upward, one pipe P is pushed out. This protruding pipe P
The rollers roll on a span plate 18 that is spanned between the stockyard 1 and the roller conveyor 2, and are placed on the respective rolls 19 and 20 of the roller conveyor 2 and the elevating roller conveyor 3, which will be described later.

Roller conveyor 2 and lifting roller conveyor 3
are for conveying the pipe P to the bending work table 4, and as shown in FIGS. 3 to 7, each roll 1 for a plurality of
9 and 20 are provided. These rolls 19,
20 is driven to rotate at the same rotational speed via sprockets 21 and 22 by a motor and a chain (not shown, respectively). Further, the lifting roller conveyor 3 is provided with pinch rolls 23, as shown in FIGS. 4 and 5. This pinch roll 23 is connected to itself and roll 2.
This is to ensure that the pipe P is fed by inserting the pipe P between the cylinder 24 and the cylinder 24.

When the pinch roll 23 pinches the left end of the pipe P, the rolls 19 and 20 are driven to rotate and convey the pipe P until the center reaches the bending device 5, and then automatically stops. In addition, pipe P
The conveyance distance is determined by the rotation speed of the rolls 19 and 20, and these rotation speeds are controlled by a rotary encoder (not shown).

When the rolls 19, 20 stop, the elevating roller conveyor 3 descends. That is,
As shown in FIGS. 6 and 7, the elevating roller conveyor 3 is composed of an upper frame 3a provided with rolls 20, and a lower frame 3b supporting the upper frame 3a. A plurality of shafts 25 are each rotatably provided. Sprockets 26 and 27 are non-rotatably provided on this shaft 25. One sprocket 26 is attached to the rod 28 of the cylinder 28.
It is rotationally driven by a chain 29 whose one end is fixed to a. A chain 30 is wound around the other sprocket 27. One end of this chain 30 is fixed to the sprocket 27, and the other end is fixed to the upper frame 3a. Therefore, the upper frame 3a is supported by the lower frame 3b via the chain 30, sprocket 27 and shaft 25,
It is moved up and down by rotation of the sprocket 26. Note that when the upper frame 3a is lowered, the left end of the pipe P is supported by a boom (see FIG. 8), which will be described later.

Further, as shown in FIG. 8, the bending work table 4 is configured to run on a rail 31 extending in the front-rear direction, and a bending device 5 is provided at the left end of the upper surface thereof. This bending device 5 is the ninth
As shown in the figure and FIG. 10, a base 32 is fixed on the bending work table 4, and a handle 33 provided on the base 32 can be rotated forward and backward through a screw mechanism or the like. It includes a movable table 34 whose position can be changed in the direction, and a rotary table 35 rotatably provided on the movable table 34. A mold 36 is provided on the upper surface of the rotary table 35. This mold 36
is used when bending the pipe P into a U-shape, and has the same radius of curvature as the inside radius of the bent portion of the U-shaped tube U to be manufactured.

Then, by this bending device 5, the pipe P is
When bending into a shape, the pipe P is held down by the cylinder 37 provided on the moving table 34, and the pipe P is pressed against the outer periphery of the mold 36 by the cylinder 38 provided on the rotary table 35. . In this state, the rotary table 35 is rotated in the direction of arrow A in FIG. 9 with the axis of the mold 36 as the rotation center. This allows the pipe P to be bent into a U-shape. In addition, the rotary table 35
It goes without saying that the rotation amount (rotation angle) should be slightly larger than the bending angle of the pipe P, taking into account the spring back of the bent portion of the pipe P.

During this bending process, the right end portion of the pipe P is supported by a support conveyor 39 provided on the bending table 4 so as to be located on an extension of the lifting roller conveyor 3. On the other hand, pipe P
The left end portion of is held by a boom 41 provided on the rotary table 35. That is, a support having a horizontal arm (not shown) is erected on the upper surface of the rotary table 35, and a pivot 4 whose axis coincides with the axis of the mold 36 is attached to the tip of the horizontal arm.
0 is rotatably provided. A boom 41 is provided on this pivot 40 . This boom 4
A plurality of hooks 42 are provided at the lower end of the hook 1 along its longitudinal direction. This hook 42 is
It is used to hold the pipe P during bending, and its bending portion is positioned slightly below the rolls 20. Therefore, if the boom 41 is placed along the lifting roller conveyor 3,
When the elevating roller conveyor 3 descends, the pipe P is automatically held by the boom 41.

Then, after the pipe bending process was completed, the U-pipe
When Pu is manufactured, the bending work table 4
The pipe Pu moves backward until it reaches the extension of the conveyor 9. The amount of movement of the bending work table 4 is controlled by a limit switch.

When the U-pipe Pu is located on the extension of the conveyor 9, the U-pipe Pu is conveyed a predetermined distance to the left by a handling robot 43 provided on the bending work table 4. That is, as shown in FIGS. 11 and 12, the handling robot 43 includes a main body 43a that is slidably provided on a horizontal shaft 44 extending in the left-right direction and is moved by a cylinder 45;
The main body portion 43a has a claw portion 43b with a well-known structure provided on the upper part.
When the user b grabs the U-pipe Pu, the bent portion of the U-pipe Pu is moved by the cylinder 45 until it reaches the inspection table 8. Then, on the inspection table 8, the accuracy of the bent portion of the U-pipe Pu is inspected by an operator.

When the accuracy inspection is completed, the U-pipe Pu is further transported to the left by the transport robot 46. As shown in FIG. 1, the transport robot 46 is installed to move along the transport conveyors 9 and 10, and has a well-known automatic hook that opens and closes automatically. pipe
It is designed to transport the U-pipe Pu by hooking it onto the bent part of the Pu.

Then, the U-pipe Pu is transported by the transport robot 46 until its both ends reach the cutting machine 6, and the both ends are cut by the cutting machine 6 into a predetermined length. After cutting, the U pipe Pu is
The cut portion is further transported by the transport robot 46 until it reaches the chamfering machine 7, and the cut surface is chamfered by the chamfering machine 7. Furthermore, after that
The bending part of the U pipe Pu is connected to the transfer robot 46.
It is hooked onto an automatic hook, and is transported onto the transport conveyor 10 with the right end portion placed on the transport conveyor 9.

The conveyor 9 is configured to include a plurality of horizontal rolls 47 extending in the front-rear direction on its upper part, and the horizontal rolls 47 are rotatable.

Further, as shown in FIGS. 13 and 14, the conveyor 10 includes columns 48 that are spaced apart from each other in the longitudinal direction, and a connecting member 80 that is provided between each column. , one end of a support member 49 extending in the front-rear direction is fixed to the upper end of each pillar 48, and a rotary roll 50 is rotatably supported at both ends of the support member 49. . Therefore, the conveyor 10 has a comb shape in plan view. Note that one of the rotating rolls 50 is connected to a chain 52 and a sprocket 53 by a motor 51.
The other rotating rolls 50 are rotationally driven by sprockets 54 and chains (not shown) provided on the rotating rolls 50, respectively.

Further, an elevating roll 55 is installed on the left side of the conveyor 10, that is, between the conveyor 10 and the cooling water tank 11. This lifting roll 55
is a U-pipe by means of pinch rolls (not shown).
This is to grip Pu and reliably convey it without slipping, and is equipped with a sprocket having the same number of teeth as the sprocket 54 provided on the rotating roll 50, and is driven by a chain that rotationally drives the rotating roll 50. It is being rotated. Furthermore, the lifting roll 55 can move up and down in order to throw the bent portion of the U-pipe Pu into the cooling water of the cooling water tank 11.

Then, the U pipe Pu placed on the conveyor 10 is transferred to the conveyor 10, the lifting roll 55
The bent portion is conveyed by pinch rolls and fed into the heating machine 12. Heating machine 12
The bent portion fed inside is heated to a predetermined temperature to relieve its internal stress. After that, the U pipe Pu is transferred to the conveyor table 10 and the lifting roll 55.
Then, it is conveyed to the right by pinch rolls until the bent portion reaches above the cooling water tank 11. When the bent portion reaches above the cooling water tank 11, the lifting rolls 55 and the pinch rolls descend with the U-pipe Pu in between. As a result, the U-pipe Pu rotates about the leftmost rotary roll of the conveyor as a fulcrum, is immersed in the cooling water tank 11, and is rapidly cooled.

15 to 17 show a cooling water tank, and a partition main body 5 is provided at the bottom right side of the water tank main body 56.
7 is provided, and this partition wall 57 and the aquarium body 5
Cooling water is sent from a pump (not shown) into the space S formed between the partition wall 57 and the partition wall 57, and the cooled water flows into the water tank body 56 through a hole 58 formed in the upper part of the partition wall 57. It's getting old. The right side wall 59 of the water tank body 56 has a side wall portion 59a that is made lower than the other side walls 60, 61, and 62 by at least the diameter of the U pipe Pu, and is formed integrally with the water tank body 56, and this side wall portion 59a. A plurality of water stop plates 59 removably provided at the upper end of the
It is composed of b. Therefore, when one of the water stop plates 59b is removed, it becomes the notch C.
As a result, cooling water flows out from this notch C. In addition, the reference numeral 63 in the figure indicates the aquarium main body 56.
This is a gutter that surrounds the outer periphery of the gutter.

Then, the U pipe is connected to the cooling water tank 56 mentioned above.
When cooling Pu, a pump drains cooling water into the water tank body 56 and the U pipe
The two water stop plates 59b located below Pu are removed, and the cooling water is allowed to overflow from the notch C formed thereby. Note that the water level H from the upper end of the side wall portion 59a of overflowing cooling water is
Keep it higher than the diameter of Pu. Thereafter, the lifting roll 55 and the pinch roll are lowered to immerse the bent portion of the U pipe Pu into the cooling water. At this time, the water level H is higher than the diameter of the U pipe Pu, so with the U pipe Pu almost horizontal,
The entire bent portion can be immersed in the cooling water at the same time, thereby providing material uniformity of the bent portion.

Furthermore, since the cooling water overflows only from the notch C, the capacity of the pump that supplies the cooling water can be made small.

The U pipe Pu cooled as above is
The product is called U-shaped tube U. This U-shaped tube U is
The lifting roll 55 and the pinch roll are returned to the horizontal state by moving upward, and then the lifting roll 5
5. It is transported by the pinch rolls and the transport table 10 until the entire object is positioned on the transport table 10. Then, it is transferred to the stock truck 13.

As shown in FIGS. 18 to 21, the stock truck 13 includes a truck main body 65 that runs on a rail 64 provided below the transport table 10 and extending in the front-rear direction, and a truck main body 65 that has vertical movement. The storage table 66 is provided with a stock table 66 that can be supported. In addition, the rail 64 is adapted to be moved up and down by a mechanism similar to the up-and-down movement mechanism in the elevating roll conveyor 3 described above.

A plurality of pairs of push rods 67 are erected on the trolley body 65, spaced apart from each other in the front and back direction. push rod 67
is for pushing the U-shaped tube U backward from the transport table 10, and is provided so as to be movable in the front-back direction in order to adjust the position according to the width of the U-shaped tube U.

Further, the left and right ends of the stock table 66 are supported by the truck body 65 in the following manner so as to be movable up and down. That is, a shaft 68 extending in the front-rear direction is rotatably provided at the lower end of one end of the truck body 65. This shaft 68 is adapted to be rotated via a gear 71 by a rack 70 which is moved by a cylinder 69. Furthermore, a sprocket 72 is non-rotatably provided at each end of the shaft 68. The main body 6 of the trolley is attached in a manner corresponding to the sprocket 72.
A sprocket 73 is rotatably provided at the upper end of the sprocket 5. And these sprocket 7
A chain 74 is wound around 2 and 73. Each end of this chain 74 is connected to the stock table 6
6, respectively. Therefore, axis 6
8 is rotated forward and backward, the stock table 66 moves up and down accordingly. The other end of the stock table 66 is also supported by the same support mechanism as the one end, but the support mechanism provided at the other end supports the stock table 66 as shown in FIG. A shaft 75 is provided on the table 66 so as to be movable in the left and right direction, and each end of the chain 74 is fixed to the shaft 75. This allows the heights of the left and right ends of the stock table 66 to be adjusted as appropriate and the heights of the left and right ends of the stock table 66 to be tilted.

When transferring the U-shaped tube U from the transport table 10 to the stock truck 13, the rail 64
is moved upward to cause the upper end of the push rod 67 to protrude from the upper surface of the transport table 10. At the same time, the stock table 66 is moved up to a predetermined position.
The upper limit position of the stock table 66 is regulated by a phototube (not shown), and if there is no U-shaped tube U on the stock table 66, the phototube will not touch the top surface of the stock table 66. When a U-shaped tube is placed on the stock table 66, the stock table 66 is stopped at a predetermined position by detecting the upper surface of the U-shaped tube U. There is. Next, the stock truck 13 is moved rearward, and the U-shaped tube U is pushed out from the transport table 10 by the push rod 67. Then, the U-shaped tube U is automatically transferred onto the stock truck 13.

In the above embodiment, in order to cool the bent portion of the U-pipe Pu, two water stop plates 59b are removed to form two notches C, but if the object to be cooled is a simple long rod-shaped In the case of an article, it goes without saying that only one waterstop plate 59b needs to be removed.

In addition, in the above embodiment, U pipe Pu
The bent part is immersed in the cooling water by slightly rotating the U-pipe, but it is also possible to immerse the U-pipe Pu in the cooling water while keeping it horizontal, which will further shorten the cooling time. be able to.

Further, in the above embodiment, the side wall 59 is composed of the side wall portion 59a and the water stop plate 59b, but the entire side wall may be formed integrally. In this case, the notch may be formed directly in the side wall.

As explained above, according to the cooling water tank for heat treatment of the present invention, the side wall of the tank main body is provided with the cut portion extending from the outer wall surface to the inner wall surface for inserting a part of the elongated article into the water tank main body. The water level from the bottom of the notch, which is formed downward from the top end of the side wall and overflows from the notch, is set higher than the diameter of the long item, so the long item can be kept in a horizontal state without rotating. A portion of the elongated member (the bent portion of the U-shaped tube) can be immersed into the cooling water through the notch by simply moving it in parallel. Therefore, the cooling time can be shortened and the material uniformity of the part to be cooled can be improved, and a large working space is not required, and furthermore, a small-sized cooling water supply pump can be used. Effects such as being able to do this can be obtained.

[Brief explanation of the drawing]

The attached FIGS. 1 to 21 show an embodiment of the present invention, in which FIG. 1 is a plan view showing a schematic overall configuration, FIG. 2 is a front view thereof, and FIG. 3 shows a stockyard and a roller conveyor. 4 is a side view showing the elevating roller conveyor and the pinch roll; FIG. 5 is a front view of the same; FIG. 6 is a side view for explaining the vertical movement mechanism of the elevating roller conveyor; FIG.
8 is a front view showing the bending work table, FIG. 9 is a plan view showing the bending device, and FIG. 10 is a front view of the same.
11 is a front view of the handling robot in its corrected state; FIG. 12 is a sectional view taken along the line XII-XII in FIG. 11; FIG. 13 is a plan view showing the conveyor 10; FIG. 14 is a front view of the handling robot. Fig. 13 is an enlarged sectional view taken in the direction of - arrow; Fig. 15 is a plan view showing the cooling water tank;
6 is an enlarged sectional view taken in the direction of the arrow in FIG. 15, FIG. 17 is an enlarged sectional view taken in the direction of the X-arrow in FIG.
19 is a side view of the stock truck, FIG. 20 is a side view for explaining the vertical movement mechanism of the stock table, and FIG. 21 is an enlarged front view of the same. 11...Cooling water tank, 56...Water tank body, 59...
...Side wall, 59a...Side wall portion, 59b...Water stop plate,
C... Cut portion.

Claims (1)

[Scope of Claims] 1. A cooling water tank for heat treatment configured such that the cooling water supplied into the tank body overflows from the tank body when performing cooling, wherein a side wall of the tank body has an outer wall surface. A notch is formed downward from the upper end of the side wall to the inner wall surface for inserting a part of the long article into the water tank body, and the cooling water overflows from the bottom of the notch. A cooling water tank for heat treatment, characterized in that the water level is set higher than the diameter of a long article.