SU1765386A1 - Coal cutter actuating mechanism - Google Patents

Abstract

The essence of the invention: the executive body comprises a disk-shaped body and cutters. The sockets for placing the holder of the corresponding cutter are evenly spaced around the body circumference. The working head of each cutter is reinforced with a hard-alloy insert. The longitudinal axes of symmetry of the incisors are located in one plane, perpendicular to the longitudinal axis of symmetry of the body. The lateral rear angle of each cutter is not less than 10 °. and not more than 15 ° C. The side rake angle of each cutter is 0 °. The longitudinal axis of symmetry of each socket is located to the radius of the housing at the same angle, the magnitude of which is at least 4 ° C. and not more than 6 °. 1 hp f-ly, 6 ill.

Description

The invention relates to mining, to cutting machines, to executive disk bodies.

A known actuator is in the form of a milling cutter type for a mining combine, comprising a housing, an axis, and cutters equipped with a ratchet-cam mechanism, the cam ring of which is mounted in the housing on the axis of rotation of the cutters.

The disadvantage of such a tool is that when it is used for drilling wells by solid bottomhole, a core is formed along the axis of the well, which must be further destroyed, as it otherwise prevents drilling. In addition, the well-known executive body is complex and unreliable in the operation

A simpler design has a disk cutting tool, the core of which is small in size and more easily destroyed.

However, the need to install teeth on a disk with a divorce leads to an increase in the width of the slot cut by the tool and one-sided wear of the tool, to its increased consumption and decrease in work efficiency.

The aim of the invention is to increase the efficiency of the executive body in the formation of wells by solid bottom, while increasing the durability of the tool.

The goal is achieved by haem, that the longitudinal axes of symmetry of the cut are located in one plane perpendicular to the longitudinal axis of symmetry of the body, with the lateral back angle of each cutter being at least 10 ° and not more than 15 °, and the lateral rake angle of each cutter is 0 °, wherein the longitudinal axis of symmetry of each slot for accommodating the cutter jaw is located to the body radius under

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the same angle, the magnitude of which is not less than 4 ° and not more than 6 °.

FIG. 1 shows the proposed executive body of the ironhome machine; the view in FIG. 2 - the same section; in fig. 3 - the same, end view; in fig. 4 - the proposed executive body of the cutting machine, when the cutter is rotated about its axis in the disc slot by 180 °, side view; in fig. 5 - the same section; in fig. 6 - the same, end view.

The executive body of the cutting machine consists of a solid metal disk 1, on which the incisors 2 are placed evenly around the circumference of the hard metal. The cutters are mounted in conical sockets whose axes are directed at an angle to the radius of the disk (4-6 °) and are held in the sockets by friction force. The axes of the tapered bores are aligned in one line along the end of the cutting disc; and the incisors installed in them do not have a divorce. The wear incisors are replaced by knocking through a hole drilled in the side of the disk and located at the location of the tail part of the tool so that the tail part of the tool part partially goes into this hole.

Recommended design geometrical parameters of incisors. The rake angle / for the side and end cutting edges is 0 °. The back angle a of each cutter is at least 10 ° and at most 15 °.

As cutters, replaceable standard cutters of the type PK-8B can be used, which are used for the cutting bodies of tunnel mining machines. The geometrical angles of the incisors in the circular saw are formed by pre-sharpening the incisor -PK-8B in a pattern.

The executive body of the cutting machine works as follows.

After switching on the drive, the disk 1 begins to rotate around the axis, and when the drive of the rotation of the spindle is turned on, the disk 1 will also perform a rotation relative to

well axis. In this case, the incisors 2, when rotated, will alternately work initially with one side cutting edge, and after passing through the center of the drill hole with another side cutting edge. The front cutting edge will destroy the rock permanently. This leads to an improvement in the use of the tool and halves its consumption. Due to the fact that the leading edge of the cutting edge is the most loaded, a site of blunting appears more quickly on it. To restore the rear corner, the machine must be stopped, the cutters 2 are turned about their axis (they must first be removed from the slot by knocking out) by 180 °, then the disc 1 must be rotated in the opposite direction. This leads to an improved use of the tool and allows you to set incisors with negative rake angle.

Claims (2)

1. The executive body of the cutting machine, comprising a disk-shaped body with evenly spaced around the circumference of the slots for accommodating the holder of the corresponding cutter and cutters, the working head of each of which is reinforced with a carbide insert, characterized in that, in order to increase its efficiency during the formation of continuous wells with the simultaneous increase in the durability of the work, the longitudinal axes of symmetry of the incisors are located in one plane, perpendicular to the longitudinal axis of symmetry of the body, while laterally second relief angle of each blade is at least 10 ° and not more than 15 °, a radial rake angle of each cutting edge is 0 °. 2. The executive body of the ironman according to claim 1, characterized in that the longitudinal axis of symmetry of each slot for accommodating the tool holder is located to the body radius at the same angle, the magnitude of which is at least 4 ° and not more than 6 °. fi