JPS5924912A - Method and apparatus for frictional cutting - Google Patents

Abstract

PURPOSE:To permit even a hard material to be efficiently cut through friction by allowing the outer periphery of a light metal disc in high speed revolution to be pressed onto the material to be worked. CONSTITUTION:A material to be worked is fixed on a table 7 and a metal disc 13 is revolved at about 2,000-4,000rpm. Then, an actuator 17 is extended and an arm 11 is turned to the direction of arrow R, the metal disc 13 is pressed onto the material to be worked. The material to be worked is locally heated through friction between the material and the metal disc, and changes to the semi-molton or fused state, and the hardness is reduced. When the metal disc 13 is pressd onto the material to be worked in this state, the disc 13 bites into the semi-molten or fused part, and the article to be worked is cut by the metal disc 13.

Description

DETAILED DESCRIPTION OF THE INVENTION (Object of the Invention) The present invention relates to a friction cutting method and apparatus for cutting a workpiece by rotating a thin metal disc at high speed and pressing its outer periphery against the workpiece. .

An object of the present invention is to make it possible to efficiently cut a hard workpiece material that has been cut using a turning section.

(Prior art) In the past, hard metals such as titanium alloys were considered difficult to cut.
Cutting was performed using a cutting wheel, but the cutting efficiency was extremely poor, and large burrs were formed at the cut portion, which required a lot of effort to remove in the subsequent process.

(Sei Sakaki of the invention) The present invention rotates an M-shaped metal disk at high speed, presses the outer periphery of the metal disk against the workpiece, and cuts the workpiece by friction between the metal disk and the workpiece. Examples will be described below based on the drawings.

In FIGS. 1 and 2, rails 2 are arranged parallel to each other in the longitudinal direction on a pedestal l, a saddle 3 is slidably provided on the rail 2, and the saddle 3 is attached to the pedestal. It slides in the horizontal direction by the actuation of an actuator 5 attached to the frame 4 above.

A rail 6 is provided on the upper surface of the saddle 3 in a direction perpendicular to the rail 2, and a table 7 is slidably provided on the rail 6. This table 7 is slid by operating an operating handle 8 provided on the saddle 3. Table 7 is a rotating table. In the figure, 9 is an operation handle for rotating the table 7, and 10 is the table 7.
This handle is a part of the locking device. At the upper part of the frame 4, an intermediate portion of an arm 11 is supported by a shaft 12,
The arm 11 is rotatable in a vertical plane. arm! A metal disc 13 is supported at the tip of the metal disc 13 so as to be rotatable at high speed. This metal disk 13 is made of a thin metal plate with an outer diameter of about 400 mm and a thickness of about 0.6 mm to 2.3 m+a, and is mainly a cold rolled thin steel plate. - Among cold-rolled thin steel sheets, SPC is the one that has the best workability and is manufactured at the lowest cost. A cutting fluid nozzle 14 for spouting a cutting fluid (mainly an aqueous solution) is provided adjacent to the metal disk 13, and the cutting fluid is supplied from a cutting fluid tank 15 to the cutting fluid nozzle 14. Arm 11
A motor 16 for rotating the metal disc 13 at high speed is provided on the top surface, and the motor 16 and the metal disc 13 are connected to each other at a V
They are linked by belts, etc. The motor 16 includes a tSt motor, a hydraulic motor, and an air motor. An actuator 17 attached to the frame 4 is connected to the tail end of the arm 11, and the arm 11 is rotated by expansion and contraction of the actuator 17 in a well-balanced manner. As the actuator 17, an air cylinder or a hydraulic cylinder is adopted.

It is preferable to provide a guide (not shown) for a metal disk 13 that rotates at high speed on the top surface of the table 7 or above it. If the hardness is high V1, the blades are provided on both sides of the metal disk 13 so as to sandwich the metal disk 13 in order to prevent the metal disk 13 from wobbling.

18 in the figure is a mount! This is a guard installed on top to prevent cutting debris or cutting fluid from scattering.

Next, to explain the cutting procedure, the workpiece is fixed on the table 7, the table 7 is moved to a predetermined position, and the motor 1
6 to start the metal disc 13 at 2000 to 4000 per minute.
Rotate at high speed called rotation. This rotational speed is set depending on the material of the workpiece, the outer diameter of the metal disk 13, etc. Subsequently, when the actuator 17 is extended, the arm 11 rotates in the direction of arrow R, and the outer peripheral portion of the metal disk 13 is pressed against the workpiece. When the metal disk 13 is pressed against the workpiece,
Frictional heat is locally generated at the contact surface between the metal disk 13 and the workpiece, heating the metal disk 13 and the workpiece. Since the metal disk 13 is cooled by the cutting fluid ejected from the nozzle 14, a rise in temperature is prevented. On the other hand, since the workpiece material is locally heated by jet friction heat, it reaches a high temperature, locally becomes a semi-molten or molten state, and its hardness is significantly lower than that at room temperature. In this state, metal disk 1
When the metal disk 13 is pressed against the metal disk 13, the metal disk 13 is partially melted or molten, and I/1 is absorbed into the metal, and the metal disk 13 divides the metal disk 13.

In the above embodiment, the metal disk 13 is moved in a vertical 1μ plane, but it is also possible to move the metal disk 13 in a horizontal plane and cut in the horizontal direction.

Further, in the above embodiment, the metal disk 13 was rotated so as to cut into the workpiece from the rotation riII and the arm 11, but the metal disk 13 was cut in a straight line in the direction of the river and the water SL in the vertical 1α direction. It is also possible to make the cut into the workpiece by moving the cutter 7.

(Effects of the Invention) In addition to the above configuration, the present invention has the following advantages.

(1) Since the workpiece is cut into a very thin metal disc with a plate thickness of 0.6+om to L3am, the amount of chips produced is extremely small and there is no shavings of the workpiece.

(2) Unlike cutting with a metal saw, there is very little occurrence of burrs, and the cut part is beautifully finished, making post-processing after cutting easier.

(3) Since the cutting is performed at high speed, the cutting time can be cut in an extremely short time of one to several tenths compared to cutting with a conventional metal saw, and the cutting efficiency is excellent.

(4) Metal discs are easy to process and can be manufactured from inexpensive cold-rolled thin steel sheets, making them highly economical.

[Brief explanation of the drawing]

FIG. 1 is a front view of the device of the present invention, and FIG. 2 is a side view. (Explanation of symbols of main parts) 1... Frame 5... Actuator 7... Table 11...
・Arm 13...Metal disk 16...
... Motor X7 ... Actuator Fig. 1 1s 2 Fig. 6

Claims (2)

[Claims] (1) A friction cutting method characterized by rotating a thin metal disk at high speed and pressing the outer periphery of the metal disk against the workpiece to locally generate frictional heat to cut the workpiece. . (2) An arm that can be rotated by actuation of an actuator is provided on the pedestal, a thin metal disc is supported at one end of the arm so that it can rotate at high speed around its axis, and the metal disc is attached to the arm. A friction cutting device characterized by being provided with a table linked to a motor and for fixing a melted material in the moving direction of a metal disk.