JPH06102301B2 - Water jet processing machine - Google Patents

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water jet processing machine, and more particularly to a water jet processing machine for processing an object to be processed with a high-pressure polishing liquid mixed with an abrasive.

2. Description of the Related Art Conventionally, as a water jet processing machine,
A nozzle for ejecting a high-pressure polishing liquid mixed with an abrasive and a catcher for collecting the polishing liquid ejected from the nozzle are provided, and the nozzle and the workpiece are moved relative to each other to perform a required cutting process on the workpiece. Those that apply are known. In the conventional water jet processing machine described above, first, the polishing liquid is jetted from the nozzle to the processing start position in the workpiece to perform piercing (perforation), and then the nozzle and the workpiece are relatively moved, The work piece is cut and processed.

By the way, in the above-mentioned conventional water jet processing machine, the polishing liquid jetted toward the workpiece during piercing rebounds and scatters to the surroundings, so that the working environment is deteriorated. was there. Further, it is known that the polishing liquid sprayed from the nozzle diffuses slightly before it reaches the workpiece by being sprayed from the tip of the nozzle. Especially, in the case of a polishing liquid containing an abrasive, However, there is a drawback that the vicinity of the processed portion of the workpiece during cutting is damaged by the slightly diffused abrasive in the polishing liquid.

[Means for Solving the Problems] In view of such circumstances,
In the present invention, a workpiece for ejecting a high-pressure polishing liquid mixed with an abrasive and a catcher for collecting the polishing liquid ejected from the nozzle are provided, and the nozzle and the workpiece are moved relative to each other to be processed. In a water jet processing machine for performing a required cutting process on the above, a cover surrounding the nozzle and having a lower end placed on the workpiece is provided, and water is supplied into the cover to supply the nozzle and the workpiece. A supply means for submerging the processed part of the product is provided.

According to this structure, the nozzle being machined and the machined portion of the workpiece are covered with the water stored in the cover. Therefore, the polishing liquid during piercing does not repel and splash outside the cover, and the diffused abrasive in the polishing liquid does not damage the periphery of the processed portion of the workpiece.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. In FIG. 1, a processing head 1 of a water jet processing machine is attached to an elevating frame 2, and the elevating frame 2 is movably provided on a portal frame 3. It is provided on a moving frame (not shown). By moving the moving frame (not shown) along the gate-shaped frame 3, the processing head 1 is moved in the X direction orthogonal to the paper surface. The processing head 1 is provided with a nozzle 4 which is directed vertically downward, and the nozzle 4 is connected to a high pressure pump (not shown). Then, when water is fed from the high-pressure pump toward the nozzle 4, the abrasive material intake port 1a is added to the water fed in the processing head 1.
The polishing material is mixed from the above, and the high-pressure polishing liquid mixed with the polishing material is jetted from the lower end portion of the nozzle 4 to process the workpiece 5. The elevating frame 2 provided with the processing head 1 is interlocked with the screw shaft 7 of the servo motor 6 provided on the moving frame, and the servo motor 6 is rotated in the forward and reverse directions by the control device 8 to move up and down. The frame 2 can be raised and lowered. Lifting frame 2
An elevating rod 9 is provided to be movable up and down, and a cover 10 also serving as a contact is attached to the lower end of the elevating rod 9. The elevating rod 9 is interlocked with a cylinder 11 provided on the elevating frame 2, and by operating the cylinder 11 by the control device 8, the elevating rod 9 and the cover 10 can be moved up and down. Further, the elevating frame 2 is provided with a detecting means 12, which detects the ascending / descending amount of the cover 10 as a contactor from the ascending / descending amount of the ascending / descending rod 9, and outputs the detection signal to the control device 8. It is designed to be input into. Then, the control device 8 uses the detection means 12
Based on the detection signal input from the above, the servo motor 6 is rotated in the forward and reverse directions by a required amount to move the elevating frame 2 to a predetermined height, whereby the nozzle 4 of the processing head 1 is moved to an optimum height. I am trying to position it. Workpiece 5
Is mounted on a processing table 13 movably provided on a frame (not shown). The processing table 13 is moved in the Y direction orthogonal to the X direction in which the processing head 1 moves. (See FIG. 2). Therefore, by relatively moving the processing head 1 and the processing table 13 in the XY directions, the workpiece 5 on the processing table 13 can be cut into a desired shape.
The processing table 1 is provided below the processing table 13.
A catcher 14 having a conventionally known configuration is arranged along the moving direction Y of the No. 3 and the catcher 14 collects the polishing liquid leaking downward during processing. In the above configuration, when the workpiece 5 is placed on the machining table 13, the control device 8 positions the nozzle 4 above the machining start position (piercing position) of the workpiece 5. After this, the control device 8 controls the cylinder 1
1 is operated to lower the cover 10 as a contactor, and the lower end portion 10a of the cover 10 is placed on the surface of the workpiece 5, and the amount of lowering of the cover 10 at this time is detected by the detection means. It is input to the control device 8 as a detection signal by 12. After that, the control device 8 rotates the servo motor 6 in the forward and reverse directions by the required amount based on the detection signal from the detection means 12 to change the height of the elevating frame 2 and the lower end portion of the nozzle 4 and the workpiece. The distance to the object 5 is maintained at an optimum distance. When the height of the nozzle 4 is adjusted in this way, a high-pressure polishing liquid containing an abrasive is jetted from the nozzle 4 toward the workpiece 5 to perform piercing (piercing a through hole).
After that, the nozzle 4 and the workpiece 5 are moved relative to each other,
The workpiece 5 is cut into a required shape. However, in this embodiment, the cover 10 that also serves as a contact is manufactured from a cylindrical rubber.
The whole area of the nozzle 4 is surrounded by. The nozzle 4 is located in the water stored in the cover 10, and the piercing and cutting processes are performed in that state. That is, in this embodiment, when the position adjustment of the nozzle 4 described above is completed,
The cover 10 is located at the lower end, and the lower end 10a of the cover 10 is placed on the surface of the workpiece 5. A conduit 17 for supplying water into the cover 10 is connected to the upper side surface of the cover 10, and water is supplied into the cover 10 by a pump (not shown) from the start of piercing to the end of the cutting process. I am trying.
By supplying water into the cover 10 in this way,
From the start of piercing to the end of cutting,
Water is stored in the cover 10, so that not only the nozzle 4 but also the processed portion of the workpiece 5 is covered with water. Further, as shown in FIG. 2, in this embodiment, a gutter-shaped collecting portion 10b is formed around the upper edge of the cover 10 so as to collect water overflowing from the upper end of the cover 10. ing. Further, a part of the recovery part 10b is stretched toward the portal frame 3, and the stretched tip portion 10c is located directly above the linear gutter 18 supported by the portal frame 3. An end of the gutter 18 provided on the gate frame is connected to a recovery tank (not shown). With this configuration, even if the cover 10 is moved in the X direction together with the nozzle 4, since the tip 10c of the recovery unit 10b is located directly above the gutter 18, all the water overflowing from the upper end of the cover 10 will be removed. It is adapted to be recovered in a recovery tank via the recovery section 10b and the gutter 18. According to the above configuration, the processed portion of the nozzle 4 and the workpiece 5 is covered with the water stored in the cover 10 from the start of piercing to the end of piercing. Therefore, during the piercing, the polishing liquid sprayed from the nozzle 4 and repelled is mixed with the water stored in the cover 10. Therefore, the rejuvenated polishing liquid does not splash to the outside of the cover 10 during piercing, and the surrounding work environment does not deteriorate. The water overflowing from the upper end of the cover 10 during the piercing is collected in the collecting tank via the collecting section 10b and the gutter 18 described above. Further, when the piercing is completed and the cutting process is started, since the cut portions of the nozzle 4 and the workpiece 5 are covered with water, the vicinity of the cut portion of the workpiece 5 is not damaged by the polishing liquid. .
That is, when the cutting process is performed in a state where the cut portions of the nozzle 4 and the workpiece 5 are not covered with water as in the conventional case, the workpiece 5 is processed by the abrasive in the polishing liquid sprayed from the nozzle 4.
Although the vicinity of the cut portion will be damaged, according to the present embodiment, such damage to the workpiece 5 can be favorably prevented. During the cutting process, not only the polishing liquid sprayed from the nozzle 4 but also the cover 1 is cut through the cut portion of the workpiece 5.
The water stored in 0 leaks to the lower side, but the leaked water is collected by the catcher 14. Further, the water overflowing from the upper end of the cover 10 during the cutting process is collected in the collecting tank via the collecting section 10b and the gutter 18 as described above. Furthermore, since the processed portions of the nozzle 4 and the workpiece 5 are submerged in the water inside the cover 10, noise generated during piercing and cutting can be reduced. Incidentally, under the processing conditions of spraying the polishing liquid from the nozzle 4 at a pressure of 3500 kg per square cm, a noise of 83 dB was detected when processing was performed without supplying water into the cover 10, whereas When processed with the nozzle 4 immersed in water as in this embodiment, the noise is 80 dB, which is obviously 3 dB.
Only was able to reduce the noise. (Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIGS. In the second embodiment, the first
The cover 10 also used as the contact in the embodiment.
Is separated into the contactor 120 and the original cover 110 itself. That is, the conventionally known contact 120 is attached to the lower end of the elevating rod 109, while the cover 110 is attached to the processing head 101 side. A cylindrical support portion 110d is integrally formed on the upper inner peripheral portion of the cover 110 in the second embodiment,
The support portion 110d is provided on the upper outer peripheral portion 1 of the nozzle 104.
01b is slidably fitted. This allows the cover 110 and the processing head 101 to move relative to each other in the vertical direction within the range of the axial dimension of the upper outer peripheral portion 101b of the nozzle 104. Cover 110 before processing starts
The supporting portion 110d of the cover 110 itself has an upper outer peripheral portion 10 on the side of the processing head 101 due to its own weight.
It is supported on the lower end step of 1b. In the processing state shown in FIG. 3, the lower end portion 110a of the cover 110 is placed on the surface of the workpiece 105 by its own weight, and in that state, the support portion 101b of the cover 110 is the nozzle. It is located in the central portion of the upper outer peripheral portion 101b of 104. Other configurations are the same as those in the first embodiment, and the members corresponding to the members in the first embodiment have the member numbers added with 100 in principle. Even with the configuration of the second embodiment, it is possible to obtain the same effects as the first embodiment. In the second embodiment, the processing head 101 and the cover 110 are vertically movable relative to each other, but the cover 110 may be fixed to the processing head 101. Furthermore, in both of the above-described embodiments, the gutter 1 supported by the collecting portions 10b and 110b of the covers 10 and 110 and the gate frame.
Although the water overflowing from the upper ends of the covers 10 and 110 is collected by means of 8 and 118, the collecting part of the cover and the gutter are not necessary as the collecting means. That is, for example, when the workpieces 5 and 105 are thin, piercing and cutting can be performed before water is stored up to the upper ends of the covers 10 and 110. In this case, the catchers 13, 113
Thus, the water supplied into the covers 10 and 110 is recovered.

As described above, according to the present invention, the polishing liquid does not bounce around and scatter to the outside of the cover, and the periphery of the processed portion of the work piece is prevented by the dispersed abrasive in the polishing liquid. The effect that it is not damaged is obtained.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a schematic plan view taken along line II-II in FIG.

FIG. 3 is a front view showing another embodiment of the present invention.

FIG. 4 is a schematic plan view taken along line IV-IV in FIG.

[Explanation of symbols]

 4 Nozzle 5 Workpiece 10 Cover 10b Recovery Section 14 Catcher 17 Conduit 18 Gutter

Claims (1)

[Claims] 1. A workpiece including a nozzle for jetting a high-pressure polishing liquid mixed with an abrasive and a catcher for collecting the polishing liquid jetted from the nozzle, wherein the nozzle and the workpiece are moved relative to each other. In a water jet processing machine for performing a required cutting process on the above, a cover surrounding the nozzle and having a lower end placed on the workpiece is provided, and water is supplied into the cover to supply the nozzle and the workpiece. A water jet processing machine having a supply means for submerging a processed portion of a product.