JPH0343008B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a slitting device for strainer pipes, and in particular to a device for slitting a strainer pipe, which is inserted into a well to prevent the intrusion of earth and sand while allowing water to pass through and obtain good quality water. The present invention relates to a processing method and apparatus suitable for slitting a strainer tube used for.

[Conventional technology]

Conventionally, in order to process a strainer tube with a large number of short slits B formed in a staggered manner in the axial direction on the tube wall of an iron strainer tube as shown in Fig. 4, the tube was lifted from below to a predetermined height and fixed. Lower the cutting blade from above so that it comes into contact with the tube surface, cut while rotating on the tube surface, and when a certain amount of cutting is completed, lower the cutting blade further and cut in the same manner to form a slit of a predetermined length. Manual processing equipment was used, and productivity was extremely low.

For example, the device shown in Figure 5 has been proposed as a device to improve productivity (Tokukō Sho 57-
(See Publication No. 43366). In this device, as a step before slitting the tube, the tube 23 is first placed on a support pedestal 25, the cylinder 28 is lowered, and a pressure piece 29 provided at its tip presses and fixes the tube against the pedestal. The cutting machine table 32 is slid, and the pipe is slit with a rotary blade 24 provided at the tip thereof to form a slit of a predetermined length, and then the cutting machine table is returned to its original position. After performing one slitting process, the cylinder 28 is raised, the tube is temporarily released, the tube is rotated by a predetermined amount, and the above-mentioned process is repeated to slit the entire tube.

Although this device has improved productivity to some extent compared to conventional manual machining, this device still has various problems as described below and is still not satisfactory.

In other words, since the pipe to be processed is fixed and released by pressure clamping between a support stand and a cylinder, it takes time to lower and raise the cylinder, and because the cylinder is repeatedly lowered and raised each time, there are many The total time required to carry out the slitting process is not negligible, and may take up about half of the total working time, so there remains a problem in terms of productivity.

Another major problem with this device is that, as mentioned above, it uses a mechanism in which the tube is pressed against the support base by the pressing piece at the tip of the cylinder.
When the wall thickness of the tube is thin or when a large number of slits are provided, it has been pointed out that deformation occurs due to the pressing force, and problems such as material deterioration, scattering of chips, and noise due to frictional heat during cutting have been pointed out. Furthermore, another major problem with the device is that the power from the motor is transmitted to the rotary blade through a plurality of gears, making it difficult and time-consuming to disassemble and repair the device when it breaks down.

[Problem that the invention seeks to solve]

The present invention solves the above-mentioned problems of strainer tube deformation, material deterioration, scattering of chips and noise, and repair problems in the event of failure, which have been problems in conventional strainer tube slitting devices, and improves productivity. The object of the present invention is to provide a strainer tube slitting method and apparatus that solve the problems at the same time.

[Means for solving problems]

As a result of extensive research into specific means for achieving the above object, the present invention has developed a system that uses a spring fixture that slides together with the milling head as a means for fixing and releasing the pipe to be processed, and that the slitting process can be performed in a liquid bath. The present invention was completed based on the finding that by doing so, the above-mentioned problems can be solved at the same time and the object can be achieved.

That is, a support base that supports the strainer tube to be processed almost horizontally is arranged in a processing tank, and after filling the tank with a liquid such as cutting fluid, the take-out chain of the take-out device is loosened to remove the entire strainer pipe. Then, it is fixed to the support base by the pressure fixing mechanism, and at the same time, the first row is fixed by a plurality of rotary blades arranged in parallel and rotating in opposite directions according to the length of the strainer tube or the number of strips. At the same time as the slitting process is completed, the rotary blade and the press-fixing mechanism are retracted together, and then the next row of slits is processed in a staggered manner using an automatic rotary indexing mechanism with a photoelectric indexing plate. Immediately, the strainer tube is rotated by a predetermined angle and also moved by a predetermined distance in the axial direction, and then the strainer tube is again fixed to the support base in the same manner as described above, and at the same time, the slits in the 28th row are processed, and the same goes on. Repeat the method, and when the slit processing of the strainer tube is completed, pull the take-out chain of the take-out device to stretch the chain in an inclined shape, and run the processed strainer tube over the slanted take-out chain. A strainer tube slitting method characterized in that the strainer tube is automatically carried out of the tank by rolling,
In addition, there is a cutting fluid tank that accommodates the strainer tube to be processed, a support that is placed in the cutting fluid tank and supports the strainer tube almost horizontally, and Multiple removable milling heads are installed in parallel.
Each milling head is equipped with rotary blades that rotate in opposite directions to each other via a timing belt from a drive motor, which grasps the end of the strainer tube and simultaneously finishes slitting the first row. The strainer tube has an automatic rotation indexing mechanism having a photoelectric indexing plate for applying a predetermined amount of rotation to the strainer tube for slitting, and a moving mechanism for moving the strainer tube forward and backward with respect to the strainer tube. A milling head with a rotary blade for slitting a pipe is equipped with a pressure fixing mechanism consisting of a plurality of spring-type pipe holders that press and fix the strainer pipe from above at the same time as the milling head slides. The strainer tube is supported in the tank by a take-out chain of a take-out device fixed to one side, and the take-out device is suspended from a sprocket provided at a position higher than the tip fixing part. It features a strainer tube slitting device.

[Effect]

In the present invention, since the cutting process is performed in a liquid bath, even if frictional heat is generated, the heat is absorbed by the liquid, so there is no deterioration of the tube material due to frictional heat, no annealing softening of the rotary blade, and no scattering of chips or noise. problems can also be effectively suppressed.

Furthermore, in the present invention, since a plurality of spring fixtures that slide together with the milling head are used as the means for fixing and releasing the tube to be processed, the fixing and releasing of the tube is performed simultaneously with the sliding of the milling head, so the operation time required is is so short that it can be ignored, and when cutting a large number of staggered slits on the entire surface of the pipe as shown in Figure 4, this fixation,
The effect of reducing the total release time is extremely large. In addition, the force that fixes the tube is the weight of the tube and the pressing force of the spring.Furthermore, when the slit processing of the strainer tube to be processed is completed, the extraction chain of the extraction device is pulled to a tension state, and the chain in the tank is pulled. The part is sloped higher than the tip, and the pipe to be processed rolls on the sloped take-out chain and is automatically carried out of the tank.

〔Example〕

Next, one embodiment of the present invention will be described with reference to the drawings.

As shown in FIGS. 1 and 2, the processing machine according to the present invention is equipped with a cutting fluid tank 1 having a length that can be extended horizontally with a pipe in which a slit is to be processed laid on its side. When the pipe 2 is placed horizontally in the tank, it is filled with cutting oil up to the liquid level 3 to the extent that the pipe 2 is submerged in the cutting oil. A V-shaped support 4 is provided in the cutting fluid tank 1 to horizontally support the tube 2, and a spring-type pipe holder integrated with a slidable milling head 9 is provided to fix the tube 2 on the support 4. 5 descends from above and moves the pipe to be processed into V
Fix it to a shaped support. Furthermore, the take-out chain 23, whose tip 33 is fixed to one side of the tank 1, passes under the tube 2 supported by the support 4 and is suspended from a sprocket 34 installed above the tip 33, and is connected to the processing machine. It is suspended from the drive sprocket 36 of the pulling motor 19 via the rear sprocket 35.

In addition, as shown in Fig. 2, a pipe 2 placed in the tank
A chuck 6 is provided for gripping the end of the tube on the axis of the tank, and the shaft of the chuck 6 is rotatably supported, extends outside the tank, and is connected to a photoelectric indexing plate 8, which is indexed via a motor or the like. Rotate the outboard plate 8,
It constitutes an indexing device. A large number of columns 7 are erected on the side of the cutting fluid tank 1, and vertical guide plates 10 for these columns are installed.
A milling head 9 is slidably mounted on the milling head, and a spring-type pipe holder 5 is attached to the plurality of milling heads.
The pipe is fixed on the V-shaped support at the same time as the milling head is lowered. The milling head 9 incorporates a replaceable spindle case 12, and has rotary cutters 11 at the lower end that rotate in opposite directions.
Two cutters are rotatably mounted, and the cutters are rotated by each drive motor 13 via a timing belt 27. Reference numeral 25 indicates a driving pulley, and reference numeral 26 indicates a passive pulley.
The number of milling heads 9 corresponds to the required number of slits in the axial direction of the pipe to be processed 2. For example, when the cutter 5 for two milling heads is installed as shown in the illustrated example, if the required number of slits is 14, then 7 slits are required. They are arranged at predetermined intervals in the axial direction of the tube 2.

Since the slitting machine has the above configuration, the tube 2 to be processed is placed in the cutting fluid tank 1 and placed horizontally on the V-shaped support 4, the tube 2 is gripped by the chuck 6, and as the milling head descends, the spring-loaded The pipe holder presses the pipe 2 and fixes it to the support base. After starting the motor 13 on the milling head 9 and rotating the cutter 11, the solenoid valve 2
When power is applied to 2, this valve is actuated to move the milling head 9 down in rapid motion, and the spring-type pipe holder comes into contact with the pipe and fixes the pipe. When the milling head hits the limit switch 16, it descends as a cutting feed, and a slit is formed in the tube 2 by the cutter 11. When the processing is completed by automatic setting, the milling head 9 stops processing by the limit switch 14, begins to rise, is released from being fixed by the spring-type pipe holder, and is stopped at the upper limit by the limit switch 17.

Next, when the photoelectric indexing device rotates the tube to be processed by an angle preset on the photoelectric indexing plate 8 and the automatic indexing is completed, the hydraulic cylinder 21,
After the milling head is moved a certain distance in the axial direction of the pipe 2 by 21a, the milling head descends again in rapid traverse, the spring-type pipe holder comes into contact with the pipe and fixes the pipe, and the cutting of the pipe is resumed, and the milling head is moved to the second row. The slits are cut in a staggered pattern.

By repeating such operations, the outer periphery of the tube 2 can be divided into circumferences, and at the same time, a plurality of slits can be formed.

After all the slits have been processed, the pull-up motor 19 is operated by the push button 18 provided at an appropriate position for easy operation and pulls the take-out chain 23, and the take-out chain 23 in the tank 1 is gradually pulled up and the tip 33 is pulled up. and the upper sprocket 34 to form an inclined shape. Therefore, the pipe rolls on this inclined chain 23 and automatically opens the tank 1.
being carried outside. V if the pipe diameters of the pipes to be processed are different.
It is sufficient to place the tube on the shape support base 4 using a spacer, and if the slits are to be machined in a staggered manner, the tube 2 can be indexed by the pressing cylinder 21 and moved in the axial direction at the same time to perform the slit process. ing.

〔Effect of the invention〕

Strainer tube slit processing method of the present invention,
According to this device, the pipe is fixed between a plurality of pressure fixing mechanisms attached to a slidable milling head and a support base as a horizontal fixing mechanism for the pipe, and the pipe to be processed is fixed and released during the vertical movement of the milling head. This greatly reduces work time, improves productivity, and eliminates the problem of tube deformation.Also, since the tube is processed in a cutting fluid tank, there is no deterioration of the tube material due to frictional heat. First, there is no scattering of cutting chips, the noise is reduced, and the slitting of the strainer tube can be performed in a good manner. Also,
The timing belt transmits the power from the motor to the rotary blade, which allows the rotary blade to cut reliably, and also significantly reduces machine noise. Moreover, the removable milling head is easy to disassemble and repair. Furthermore, the strainer tube after processing can be easily carried out of the apparatus by simply pulling the take-out chain by the take-out device and making the chain in an inclined shape, thereby significantly shortening the working time and improving productivity.

[Brief explanation of drawings]

Figure 1 is a side view of the strainer tube slitting device of the present invention, Figure 2 is its front view, Figure 3 is a sectional view of the milling head, Figure 4 is a schematic diagram of the strainer tube, and Figure 5 is 1 shows a side view of a conventional slitting device. DESCRIPTION OF SYMBOLS 1... Cutting fluid tank, 2... Workpiece pipe, 4... Support stand, 5... Pressure fixing mechanism, 6... Chack, 7...
... Support column, 8 ... Photoelectric indexing plate, 9 ... Milling head, 10 ... Vertical guide plate, 11 ... Rotating blade,
12...Spindle case, 13...Motor,
23...Take-out chain.

Claims (1)

[Scope of Claims] 1. A support base that supports the strainer tube to be processed almost horizontally is placed in a processing tank, and after filling the tank with a liquid such as cutting fluid, the take-out chain of the take-out device is loosened. The entire strainer tube is immersed, and then fixed to a support base by a press fixing mechanism, and at the same time, a plurality of rotary blades are arranged in parallel and rotate in opposite directions depending on the length of the strainer tube or the number of slits. The first row of slits is machined by the automatic rotating machine equipped with a photoelectric indexing plate in order to slit the first row, simultaneously retract the rotary blade and the pressing and fixing mechanism together at the end of the slit processing, and subsequently slit the next row in a staggered manner. Immediately, the strainer tube is rotated by a predetermined angle by the indexing mechanism, and also moved by a predetermined distance in the axial direction, and then the strainer tube is again fixed to the support base in the same manner as described above, and at the same time
After slitting the rows, the same method was repeated, and when the slitting of the strainer tube was completed, the take-out chain of the take-out device was pulled to stretch the chain into an inclined shape. A strainer tube slitting method characterized in that the strainer tube is automatically carried out of the tank by rolling the strainer tube after processing on a take-out chain. 2. A cutting fluid tank that accommodates the strainer tube to be processed, a support that is placed in the cutting fluid tank and supports the strainer tube almost horizontally, and Multiple removable milling heads are installed in parallel.
Each milling head is equipped with rotary blades that rotate in opposite directions to each other via a timing belt from a drive motor, which grasps the end of the strainer tube and simultaneously finishes slitting the first row. The strainer tube has an automatic rotation indexing mechanism having a photoelectric indexing plate for applying a predetermined amount of rotation to the strainer tube for slitting, and a moving mechanism for moving the strainer tube forward and backward with respect to the strainer tube. A milling head with a rotary blade for slitting a pipe is equipped with a pressure fixing mechanism consisting of a plurality of spring-type pipe holders that press and fix the strainer pipe from above at the same time as the milling head slides. The strainer tube is supported in the tank by a take-out chain of a take-out device fixed to one side, and the take-out device is suspended from a sprocket provided at a position higher than the tip fixing part. Strainer tube slitting equipment.