JPS6357171A - Multi-steel wire type cutting device - Google Patents

Abstract

PURPOSE:To enable cutting of high efficiency by sealing a commodity in a cutting chamber, feeding abrasive grains therein until covering a steel wire and filled in a positive pressure condition and cutting the commodity in such a way as to bite the steel wire under travel. CONSTITUTION:When a commodity M and abrasive grains have been houses in a cutting chamber 16, a steel wire 15 is made to travel and the commodity M is gradually lifted with a pressurizing mechanism 23, thereby making the steel wire 15 bite the commodity M. Then, the abrasive grains filled around are deposited on and travel with the steel wire 15, and are pressurized into a cutting groove, thereby effectuating a cutting process. In this case, the abrasive grains at a cutting position are dispersed over all cutting positions as shown with a sign A. Also, a variable throttle valve 49 is opened to a small extent and while the abrasive grains are being gradually discharged from the bottom of the cutting chamber 16, the reduced quantity of the abrasive grains is replenished by a feed mechanism 30, or compressed air is introduced with compressed air 53, thereby causing the flow motion of the abrasive grains in the cutting chamber 16 and enabling a cutting process with fresh abrasive grains at all times.

Description

DETAILED DESCRIPTION OF THE INVENTION The multiple steel wire cutting device of the present invention is particularly useful for cutting articles with large cutting surfaces.

Conventional technology Articles made of hard, brittle or difficult-to-cut materials.

It is known that one of the methods for cutting thin objects is to run a small-diameter object in one direction, attach abrasive grains and bite into the object, and cut by the abrasive action of the abrasive grains. In order to improve the work efficiency in this cutting technique, for example, as schematically shown in Fig. 3, the scrap @4 is wound around three multi-groove pulleys 1, 2, and 3 arranged in parallel and triangularly. At the same time, both ends of the wire are wound around two bobbins 5.6, and the article 8 is bitten into a steel wire 'A which runs parallel to each other in one direction between two multi-groove pulleys 1.2. Abrasive grains are dropped from a nozzle 7 installed on the opposite side.When the steel wire 4 finishes paying out from one bobbin 15, it is reversed and fed out from the other bobbin 6, making it reciprocate. The abrasive grains that fall onto the article 8 adhere to the steel wire 4 and are carried along, and their grinding action cuts the article 8 into a large number of thin pieces at once.

Multiple steel wire cutting device (multi-wire saw) as mentioned above
K Required issues include firstly improving cutting efficiency, secondly preventing wire breakage when reversing the steel wire and equalizing tension during cutting.
Thirdly, the lifespan of multi-groove pulleys can be improved. second.

The third problem is a mechanical problem, but the first problem involves the grinding action of the abrasive grains.

That is, it is necessary that abrasive grains are constantly supplied to all the cutting points, but in the case of articles with dog-edge cut surfaces, the abrasive grains are allowed to flow down naturally on the surface of the article as shown in Fig. 3 above. In the method.

As shown in Fig. 4, the cutting groove SI has a width approximately equal to the steel wire diameter.
Since the C abrasive grains A penetrate <<, the central part of the article M is cut only by the steel wire W. For this reason, it is necessary to run the steel 1w at a low speed to entrain and block the abrasive grains A, and at the same time to prevent abnormal generation of frictional heat, and to prevent the inconvenience of rough cut surfaces and breakage of the steel wire. There is no hope of improving cutting efficiency. Furthermore, there is also the problem that excess abrasive grains fall from the article M or scatter as the steel wire W runs, deteriorating the working environment.

Therefore, the present invention provides a multiple steel wire cutting device that allows abrasive grains to fully immerse into the extremely narrow cutting grooves of articles with large cutting surfaces, without worrying about scattering to the surroundings, and therefore cutting with high cutting efficiency. It was invented with the aim of providing.

The present invention has a cutting chamber which is parallel to each other and runs in one direction and traverses between two multi-groove slides, and which has an openable closed cutting chamber that accommodates the article to be cut by the steel wire. and a supply mechanism that feeds abrasive grains into the cutting chamber under positive pressure.

A means for solving the above-mentioned problems is achieved by adopting a configuration that includes a discharge mechanism that sends abrasive grains out of the cutting chamber, and a pressure mechanism that bites into the 1GK article.

No action! The article is stored in the fI plan, sealed, and the low grains are fed through the supply mechanism until at least the steel wire is buried. Then, the steel wire is moved steadily and the load is applied by the pressure mechanism. The article is gradually bitten into the steel wire and cut. At this time, since the abrasive grains are under positive pressure, they enter the cutting grooves formed in the article and are supplied to all the cutting locations, performing a grinding action as the steel wire travels. After cutting, the abrasive grain is discharged from the cutting chamber by the abrasive discharge mechanism, and the cutting chamber is opened to take out the cut article and store the next article.

During the cutting operation, the abrasive grains may be discharged little by little by the discharge mechanism and replenished little by little by the supply mechanism, so that the abrasive grains flow along the cutting guide and the grinding action is always performed with new abrasive grains.

According to the present invention, since the abrasive grains are cut and analyzed in 119 places under positive pressure, they can sufficiently penetrate into even the very narrow cutting grooves of the article and perform the grinding action at all the cut places. . Therefore, even with large cut surfaces, the steel wire can be run at high speed and cut by the grinding action of the abrasive grains with high efficiency without the risk of wire breakage, and a cut surface comparable to that achieved by lapping can be obtained. It will be done.

Further, since abrasive grains are supplied to a closed cutting chamber and cutting is performed therein, not only is there no loss due to falling or scattering of abrasive grains, but there is also no fear of deteriorating the working environment.

FIG. 1 shows an embodiment of the present invention, in which four multi-groove pulleys 11, 12, 13.
A JI wire 15 is wound around the wire 4, and both ends of this -@150 are wound around two bobbins (not shown), respectively. Either of the upper left and right multi-groove pulleys 13, 14 is driven by a reversible prime mover (not shown) to cause the scrap line 15 to travel back and forth.

The cutting chamber 16 has a box-shaped structure divided into upper and lower halves.

It is formed by a lower box 18 fixed to a base 17 and an upper box 20 that moves up and down by a lifting mechanism 19 consisting of a fluid pressure cylinder, and the mating surfaces of the lower box 18 and the upper box 2o are made of synthetic rubber,
Nuru made of elastic materials such as synthetic resin! t21,2
2 are closely spaced Nj to each other, resulting in airtightness. The A wires 15 arranged parallel to each other on the lower left and right multi-groove sliders xt, t2 no f'J] run in one direction on the horizontal plane while being rubbed between the upper and lower sealing materials 21 and 22, and traverses the cutting chamber 16.

The pressurizing mechanism 23 for the article M to be cut by the steel wire 15 running across the cutting chamber 16 includes a pedestal 24 on which the article is placed and a fluid pressure cylinder 25.

A piston/rod 26 protrudes from a fluid pressure cylinder 25 installed below the lower box 18 on a pedestal 24 built into the cutting chamber 16.
are connected to each other, and the pedestal 24 is moved up and down by alternately supplying and discharging pressurized air to an upper chamber 28 and a lower chamber 29 that sandwich the piston 27.

The abrasive grains are fed into the cutting chamber 16 in the form of a slurry mixed with cutting oil.The abrasive grain supply mechanism 30 includes a storage tank 31 and a feed pipe 32 connected to the upper box 20 and opened into the cutting chamber 16. and,
An abrasive grain drop 33 provided at the end of the feed pipe 32. Open/close valve 34.
A return pipe 36 (a high pressure relief valve 37 is provided) is branched from between the abrasive grain pump 33 and the on-off valve 34. The abrasive grains pressurized by the abrasive grain bottle 33 are transferred to the on-off valve 3.
4. The cutting chamber 16 is fed through the check valve 35 and filled with positive pressure, and when the pressure exceeds a certain level, the high pressure relief valve 37 opens to release the abrasive grains.

Note that a stirrer 38 is attached to the storage tank 31.

The cutting oil and abrasive grains are uniformly mixed and sent to the cutting chamber 16. In addition, in order to replenish cutting oil, there is a
An oil pump 42 is connected to an oil pipe 41 connecting 9 and upper in 20.
．． Open/close valve 43. Cutting oil configured by providing a check valve 44? An auxiliary supply is provided, and cutting oil is supplied to the cutting chamber 16 at a pressure regulated by a high pressure relief valve 47 provided in the return pipe 46.

The abrasive grain exhaust mechanism 48 has a delivery pipe 50 having a variable throttle valve 49 connecting the bottom of the lower box 18 and the storage river 31.

It includes an on-off valve 51 and a check valve 52 in this order, and a pressurized air pipe 53 connected to the upper box 20.

Raise and lower! By alternately supplying and discharging pressurized hydraulic oil to the upper chamber 55 and lower chamber 56 that sandwich the piston 54 of the four shafts 19, the upper box 20 connected to the piston rod 57 is moved up and down to open and close the cutting chamber 16. do. Raise the upper box 20 and place the article M
is placed on the stand 24 horizontally and perpendicular to the A line 15, and the upper box 20 is lowered to seal the cutting chamber 16. Next, the abrasive pump 33 is rotated 1' and the abrasive grains stored in the slurry state are fed into the cutting chamber 16 and loaded under a positive pressure state, generally pressurized to about 1%. In case, abrasive cutting chamber 16
Either the steel wire 15 is filled to the top or slightly above the steel wire 15 and pressurized air is fed from the pressure air pipe 53 to maintain a positive pressure state.

When the article M and the abrasive grains are accommodated in the cutting chamber 16 in this way, the article M is raised little by little by the pressurizing mechanism 23 while the steel wire 15 is running, and @M@15 is bitten. The abrasive grains surrounding the steel wire 15 are attached to the steel wire 15 and are carried along with the steel wire 15, and are press-fitted into the cutting groove to perform grinding.

At this time, the abrasive grains at the cutting point are completely cut as shown by the symbol A in Fig. 2! Travels to yT locations.

Alternatively, the variable throttle valve 49 may be slightly opened to discharge the abrasive grains from the bottom of the cutting chamber 16 little by little, and the supply mechanism 30 may be used to replenish the reduced amount, or the pressurized air pipe 53 may be used to introduce pressurized air. , a brazing cutting chamber 16 in which the abrasive grains are made to flow within the cutting chamber 16 so that the grinding action is always performed with new abrasive grains.
When the steel wire 15 passes between the sealing materials 21 and 22, adhering abrasive grains are scraped off, and the multi-groove pulley 11...
・14 wear is prevented.

After cutting, the sharpening supply mechanism 30 is stopped and the variable throttle valve 4 is closed.
9 is fully opened, and the pressure air pipe 53 also introduces pressurized air to discharge the abrasive grains from the cutting chamber 16. When the cutting is completed, the article Mki is raised above the steel wire 15 and is located inside the upper box 20, so when the steel wire 15 is discharged to the extent that it is exposed, the upper box 20 is raised by the lifting mechanism 19.

Take out article M. In order to accommodate the secondary article M, it is necessary to discharge the abrasive grains to the extent that the pedestal 24 in the lowered position is exposed.

In the embodiment described above, the pressurizing mechanism 23 for the article M and the elevating mechanism 19 for the upper box 20 are fJ configurations using fluid pressure cylinders, but they may also be configured by a gear setting device using a rack and pinion. Needless to say.

[Brief explanation of the drawing]

Figure XA1 is a vertical cross-sectional layout diagram of an embodiment of the present invention. FIG. 2 is a diagram illustrating the state of abrasive grains at the cutting location. FIG. 3 is a schematic view of a fence of a conventional example, and FIG. 4 is a diagram illustrating the state of abrasive grains at the cutting location. 11.12...Multi-groove pulley, 15...Steel @, 16...Cutting chamber, 18...Lower box,
19... Lifting mechanism, 20... Upper box,
21.22... Sealing material, 23... Pressure mechanism, 30... Supply mechanism, 48...
Ejection mechanism.

Claims (1)

[Claims] A steel wire running parallel to each other and running in one direction crosses between two multi-groove pulleys, and an openable closed cutting chamber for storing the article to be cut by the steel wire; It is characterized by comprising a supply mechanism that feeds abrasive grains into the cutting chamber under positive pressure, a discharge mechanism that feeds the abrasive grains from the cutting chamber, and a pressurization mechanism that bites the article into the steel wire. Multiple steel wire cutting device.