RU1779470C - Built-up parting cutter - Google Patents

Abstract

Usage: metal cutting. The cutter contains a housing. A movable cutting insert is mounted in an inclined, rectangular, flat base groove. The groove for the cutting insert is made open from one of the sides of the housing and is closed by an elastic bar with screws, which are pressed against the cutting insert by screws. On the other side of the housing there is a longitudinal stepped groove for the retainer in contact with the end surface of the cutting insert, fixed in the required position with a conical screw. 4 ill.

Description

The alleged invention relates to the field of metal cutting, in particular to a precast cutting tool.

A prefabricated detachable cutter is known, in the inclined groove of which a cutting insert is mounted with the possibility of movement, which is secured by a grip.

The disadvantage of this design is that the cutting insert is located in the groove open on the side, which causes a sticking to the protrusion, and the front surface of the cutting insert with a corresponding depression to prevent the plate from moving in the transverse direction. And the presence of a stick with two fixing bolts does not allow to reduce the width of the cutter, which ultimately eliminates the possibility of using a set of cutters.

Also known are slotted and cutting tools. In the holder of such a cutter, the cutting insert is fastened with a grip that can be moved along the holder with a screw located in the tail of the cutter and passing through the holder body parallel to its base.

The disadvantage of this cutter is the presence of a special insert cutting insert. The range of movement of the cutting insert is very small, which limits the number of regrinds. Adjusting the insert with a screw parallel to the base of the holder is not technologically advanced because provides for the implementation in the holder of a threaded hole of small diameter and large length.

Also known cutting tool, considered as a prototype.

Such a cutter comprises a housing with an inclined groove made in it with a V-shaped base for a cutting insert, which is mounted in it with the possibility of movement limited by a fixing element containing an adjustment screw passing through a threaded hole made in the sleeve

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ke located in the housing at the end of the groove under the cutting insert. The fixing of the insert is carried out by means of a clamping element in the form of an eccentric stepped pin with a ledge made on a smaller diameter. A screw is located at an angle to the pin, in contact with the cylindrical part with a step on the pin, attracting the latter to the base of the cutter and thereby securing the cutting insert.

A disadvantage of such a tool is the complexity of its structural and technological execution due to the manufacture of a V-shaped base in a groove closed on three sides. The presence of a long adjusting screw of small diameter determines the execution of the corresponding threaded holes of small diameter and large length, which also reduces the manufacturability of this design.

The aim of the proposed invention is to simplify the design and technological execution.

For this purpose, a cutting insert is mounted in an assembled cutting tool containing a body, in an inclined groove of which, with the possibility of movement limited by a fixing element, a cutting plate is fixed, secured by a clamping element, the groove for the cutting plate is made rectangular with a flat supporting surface and open on one of the sides a housing to which a clamping element is fixed in the form of an elastic bar, and a longitudinal groove is made on the other side of the housing, in which a locking element is mounted for movement.

Figure 1 shows a cutter, front view; figure 2 is the same, a top view; in Fig.3 - section aa in Fig.1; figure 4 is a section bB in Fig.Z.

The prefabricated cutting tool comprises a housing 1, a replaceable cutting insert 2 that is repeatedly thrown over the rear surface and mounted for displacement in an inclined rectangular

a groove 3 made in the housing 1 and open on one of the sides of the housing 1, to which the elastic plate 4 is attached by fixing screws 5. The elastic clamp

the strips 4 to the cutting insert 2 are carried out by means of clamping screws 6. On the other side of the housing 1 there is a longitudinal step groove 7 in which the latch 8 is placed in the form

a stepped sleeve in contact with the end surface of the cutting insert 2. In the end face of the retainer 8 extending to the side surface of the housing 1, a hole is made for a screw 9 with a conical head. Groove

7 can be located parallel to the base of the housing 1 or parallel to the supporting plane 10 of the groove 7 under the cutting insert 2 (the second embodiment is not shown in the drawing).

The inventive prefabricated cutting tool has a structural and technological design simplicity, provides reliable basing and fixing of the cutting insert, excluding the lateral displacement of its working protrusion. The possibility of longitudinal movement of the cutting insert allows it to be regrind on the rear surface after wear, and the latch ensures that the extension of the cutting insert is constant.

Claims (1)

SUMMARY OF THE INVENTION A prefabricated cutting tool comprising a housing, in an inclined groove of which, with the possibility of movement limited by a fixing element, a cutting insert is installed, which is secured by a clamping element, characterized in that. in order to simplify the design and manufacturing technology, the groove for the cutting insert is made rectangular with a flat supporting surface and open on one of the sides of the housing to which the clamping element is made, made in the form of an elastic bar, and on the other side of the housing, a longitudinal groove is made in which the locking element is mounted for movement. FIG. / Aa  . -L. .Z Ј-6 / // , .-. -. -. - -f4 -Y have ;. I 7 Ј / t S .-h U