JPH06170606A - Cutting device - Google Patents

Abstract

PURPOSE:To cut chips produced from a material to be cut automatically to a roughly specified length. CONSTITUTION:A shank 4 is supported pivotally near the top of it on a shank mounting section 2 by an oscillating rotation shaft 3, a cutter chip 5 with cutting blade is installed at the tip of the shank 4, and one end of a transmission arm 6 as a transmission section is fixed rotatably to the end protruded from a mounting section 2. Also the other end of the transmission arm 6 is fixed to a position eccentric from the center of a gear 7 which constitutes a part of a transform mechanism, and connected to a drive source 9 through a gear train 8 so that the oscillating direction of the cutter chip 5 is set in parallel with the axial direction of the rotational axis of a work to be cut.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting device capable of automatically cutting chips generated from a work piece into small pieces having a substantially constant length.

[0002]

2. Description of the Related Art It is widely known that steel and plastics are cut by a cutting machine such as a lathe. At that time, depending on the type of material, there is a flow type in which chips are connected for a long time and cut out. If this flow type chip is not properly processed, it may wind around the work piece and damage the finished surface of the work piece, or it may bite into the cutting portion and impair the cutting work. In addition, the flow type chips that are connected and cut out for a long time have a large apparent volume,
It is not preferable from the viewpoint of chip disposal.

[0003] Therefore, conventionally, as a technique for making such flow-type chips into small-sized chips of a certain length, for example, a suction device for sucking the chips, a pinch roller for pulling out the chips, and a constant amount of the chips. A device consisting of a pair of cutting rollers with a cutting blade for cutting into small pieces of length is provided, or a device using a chip breaker in which various shapes of grooves are processed on the cutting blade, or the cutting tool itself. 2. Description of the Related Art There are provided a device for rotating motion, a device for linearly reciprocating a device body, and the like.

[0004]

However, in the case of the above cutting roller, while rotating a pair of cutting rollers with cutting blades, flow type chips are drawn between the cutting blades and the cutting blades are cut. Since the chips are cut into small pieces of a certain length by the shearing force of the cutting blade due to the rotation of the roller, it is not necessary to adjust the meshing condition of the cutting roller's cutting blade or the gap caused by cutting blade wear. However, there was a problem in workability and quality problems.

The above-mentioned chip breaker is effective for cutting chips into small pieces of a certain length in cutting hard steels, plastics, etc., but it is a soft or sticky metallic material, nylon. It was not suitable for cutting chips such as plastic.

Further, in the case of the reciprocating motion, the thickness of the small chips may change periodically, which may cause a problem in quality such as accuracy of the surface of the work piece, and the cut small chips may cause problems. The curled shape may be difficult to handle, and the size of the device tends to be large, and it may take time to adjust the length of the chips.

The present invention focuses on the above-mentioned problems of the conventional apparatus, and in order to easily perform uniform and stable quality cutting with a small apparatus, the work piece is cut with a bite tip. At the same time, it is an object of the present invention to provide a cutting device capable of automatically cutting generated chips by swinging motion of a bite tip into small pieces having a substantially constant length.

[0008]

In order to solve the above-mentioned problems, according to the present invention, a shank supported by a rocking rotary shaft is provided with a bite tip, and the other end of the shank is centered around the rocking rotary shaft. Is provided with a swinging mechanism for swinging the shank within a predetermined width, and the swinging direction of the bite tip is set to be parallel to the axial direction of the rotating shaft of the workpiece, thereby forming a cutting device. It is a thing.

[0009]

The rotary motion of the drive source is transmitted to the other end side of the shank as a swing motion through the transmission part to give a swing motion to the tip of the shank about the swing rotation shaft, and the cutting edge thereof is provided. The rotating work piece is cut, and the chips are finely cut when rocked.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings of an embodiment. FIG. 1 shows a cutting device according to the present invention, in which a shank mounting portion 2 is formed on a side portion of a tool rest 1,
A swinging rotary shaft 3 pivotally supports the mounting portion 2 near the tip of the shank 4, and the swinging rotary shaft 3 swings in the feed direction of the apparatus, that is, the rotary shaft direction of the workpiece. The shank 4 is formed in a direction orthogonal to the feed direction, and a tool bit 5 having a cutting blade is attached to the tip of the shank 4, and the other end is provided so as to project from the mounting part 2 and the other end is a power transmission part. One end of the arm 6 is rotatably fixed, and the other end of the transmission arm 6 is rotatably fixed at a position eccentric from the center of the gear 7 forming a part of the conversion mechanism, and the gear train 8 is interposed. And is connected to a drive source (motor) 9.

It is preferable that the swing is set so that the amplitude of the cutting edge of the cutting tool 5 is larger than the chip thickness and that the frequency of vibration is not synchronized with the rotational speed of the workpiece. It should be noted that the configuration in which the portion other than the bite chip 5 is covered with a casing and formed is arbitrary.

The cutting work by the above-mentioned cutting device, like the normal cutting work, sets the main spindle speed, the cutting depth and the feed amount of a turning machine such as a lathe to a predetermined value, respectively, and then rotates the driving source to The cut body 10 is cut by rotating the cut body at a high speed.

The rotation of the drive source, that is, the rotation of the gear 7, is transmitted to the end of the shank 4 as a swinging motion by the transmission arm 6, and the cutting edge of the bite tip 5 at the tip of the shank 4 is rotated about the swinging rotary shaft 3. The rocking motion is performed to intermittently move the work piece into and out of contact with the work piece at high speed. Since the cutting blade cuts the work piece at the time of contact, and the cutting edge cuts the chip at the time of detachment, the chips generated by the cutting are divided into small pieces as the rocking. The cut small chips are preferably collected by, for example, a chute arranged directly around the cutting tool, a collecting container, a vacuum collecting device, or the like.

[0014]

As described above, according to the present invention, it is possible to continuously cut a work piece while cutting chips into small pieces each having a substantially constant length, and therefore, a work similar to a normal cutting work is performed. It is possible to provide a cutting device capable of converting chips into small chips. In this cutting device, the bite tip is repeatedly oscillated at high speed by repeatedly contacting and disengaging the surface to be cut, so that the cutting surface can be finished smoothly and the shack 4 pivotally supported by the oscillating rotary shaft can be oscillated. Since it is a simple mechanism for swinging the bite tip attached to its tip, the device can be downsized and its operation and maintenance can be facilitated.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of a cutting device according to the present invention.

[Explanation of symbols]

 1 Turret 2 Mounting part 3 Swing rotary shaft 4 Shank 5 Bit tip 6 Transmission arm 7,8 Gear 9 Drive source

Claims (1)

[Claims] 1. A bite tip is attached to the tip of a shank supported by an oscillating rotary shaft, and an oscillating mechanism for oscillating the shank with a predetermined width around the oscillating rotary shaft is provided on the other end side. A cutting device in which the swing direction of the tip is set to be parallel to the axial direction of the rotary shaft of the workpiece.