SU1553258A1 - Tool with exchangeable cutting bit - Google Patents

Abstract

The invention relates to the field of metalworking, namely to a precast cutting tool for turning machines. The purpose of the invention is to expand the functionality and is achieved by reducing the time to replace the cutting plates by simplifying the fastening mechanism. The assembly cutting tool comprises a holder 1, in the slot of which the cutting 2 and the support 3 plates are mounted. The cutting plate 2 is fastened with a pin 4, at the lower end of which there is fastened an elongated bar 5 placed in the groove of the holder 1 by means of its protrusion 6 with a roller 7 installed in the holder rotatably around a horizontal axis. The roller 7 is provided with a head 8, on the inner end of which there is a hole in which a retainer 9 with a spring 10 is placed. For retaining the head in one of two positions, recesses 11 are made at the end of the holder, a spring-loaded retainer 9 interacts with recess 11 walls. an annular recess 12 is provided, the locking screw interacting with the walls of which. The working end of the roller 7 is kinematically connected with the end of the bar 6. The loosening and fixing of the plate is carried out by rotating the roller head through 180 °. The working end of the roller 7 acts on the bar 5, and the latter, in turn, on the pin 4, turning it around the pivot point and thereby unpin or fasten the cutting plate. 1 hp f-ly, 2 ill.

Description

The invention relates to metal working, in particular to an assembly cutting tool for turning machines.

The purpose of the invention is to increase productivity by reducing the time to replace the insert by simplifying the attachment mechanism.

FIG. 1 shows a cutting tool assembly, side view; in fig. 2 is a section A-A in FIG. one.

The assembly cutting tool comprises a holder 1, in the slot of which the cutting 2 and the support 3 plates are mounted.

The fastening of the cutting plate 2 is carried out by a pin 4, on the lower end of which is fixed placed in the groove

holder 1 elongated strap 5, connected by means of its protrusion 6 with a roller 7, mounted in the holder with the possibility of rotation around a horizontal axis.

The roller 7 is provided with a head 8, on the inner end of which there is a hole in which a retainer 9 with a spring 10 is placed. For retaining the head in one of two positions, recesses 11 are made at the end of the retainer, with spring-loaded retainer 9 interacting with the walls.

To prevent axial displacement, an annular undercut 12 on the roller and a locking screw 13 are provided.

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The connection of the strap 5 and the roller 7 is carried out by means of a cylindrical protrusion 6 at the end of the strap 5, interacting with the walls of the groove 14 at the working end of the roller 7.

The replacement and rotation of the cutting plate in the tool is carried out as follows.

To undo the plate, the grooved head 8 of the roller 7 is required to turn 180 ° around the horizontal axis, transferring the fixer 9 from the upper recess on the holder to the bottom.

When the roller is rotated, the groove 14 at the working end of the roller moves along an arc of a circle from the lower to the upper position, translating the end of the bar associated with its walls to the upper position. The bar, in turn, rotates the pin 4, freeing the cutting plate 2. To fix the plate, it is sufficient to return the roller 7 to its original position.

Claims (1)

1. Precast cutting tool containing a holder, cutting and support plate 0 five tins with holes secured by a pin placed in the holes with a strap attached to the bottom of the pin at one end and a clamping element connected to the end of the pin, characterized in that, in order to increase productivity by reducing the time replacement of the cutting plate, the tool is provided with a locking screw placed in the holder, and the clamping element is designed as a horizontally placed roller with an annular recess and a head, with a hole on the inner end of which is made nnym therein a spring-loaded clamp in contact with the walls of one of the two formed recesses in the end face of the holder, wherein the annular groove configured to cooperate with the locking screw. 2 A tool according to claim 1, characterized in that the connection between the bar and the end of the clamping element is made in the form of a cylindrical protrusion at the end of the bar and a groove on the working end of the roller, the protrusion being designed to interact with the walls of the groove TO