SU1020192A1 - Tool for chamfering two end faces of hole - Google Patents

Abstract

TOOL FOR REMOVING THE COOLERS FROM TWO SIDES OF THE OPENING, containing a hollow body with radially displaceable spring-loaded cutting elements, the cutting edges of which are angled to one another, the tail part and the wiper with an expanding element fixed from rotation relative to the body and installed inside it with the possibility limited axial and lateral movement. and with inclined surfaces made on the inner side of the cutting elements, characterized in that, in order to simplify the design, the tail section is located on the rod on the opposite side of the expanding element, having the form of two truncated cones with a common large base, and the inclined surfaces have a profile , reverse profile of the sliding element. u with tc

Description

The invention relates to metalworking and can be used for chamfering.

A chamfering tool is known. It has two sides of a hole containing a hollow body with radially movable spring-loaded cutting elements, the cutting edges of which are at an angle to one another, the tail part and the pins with an expanding element fixed against rotation in the body and installed inside it with the possibility of limited axial movement and interaction with inclined surfaces made from the inside of the cutting elements 1

The known tool has a separate drive mechanism for the pushing rod of the pushing element, which complicates its design.

The purpose of the invention is to simplify the design.

The goal is achieved by the fact that in the chamfering tool on both sides of the hole there is a hollow body with spring-loaded cutting elements that can be radially moved, the cutting edges of which are angled to one another, the tail part of the shanks with the expanding element fixed against rotation. relative to the body and installed inside it with the possibility of limited axial movement and interaction with inclined surfaces made from the inside of the cutting elements comrade, tail portion schtoke located on the opposite side of Spreads element having the shape of two truncated cones with a common bolschoy base, and the inclined surfaces have a profile, the profile pushes the return element.

The drawing shows the proposed tool.

The tool has a body, 1, made in the form of a collet with cutting elements 2 on the petals, the cutting edges of which are at an angle to one another, the tail part 3 located on the shaft 4, the opposite end of which is the expanding element 5 and has the shape of two truncated cones with a common large base, the diameter of the large base determines the size of the chamfer, and the angle at the tip of the cones is selected between 9-90 ° depending on the material being processed. On the inner side of the cutting elements there are inclined surfaces 6,

having a profile inverse to the profile of the pushing element 5 of the stem 4. On the stem 4 there is a longitudinal groove 7, the length of which exceeds the length of the expanding member.

The rod 4 is installed inside the housing 1 with the possibility of axial movement and secured against rotation by means of a pin 8 located in the groove. The largest diameter along the cutting edges exceeds the diameter of the hole machined in the part 9

by the amount of springing of the cutting elements 2, which is selected from the condition of free passage of the tool through the hole.

The tool works as follows.

The tail part 3 is fixed in the machine stem and informed about the rotation, which is transmitted to the body 1 with the cutting elements 2 via the tongue 8. The axial feed movement of the tool leads to the piece 9. The cutting elements 2 abut against the edge of the hole with their lower cutting edge, and The brush 4 continues to move relative to the housing 1 and acts by the pushing element 5 on the internal inclined surfaces 6 of the cutting elements, pushing them in a radial direction. At this time, the cutting elements 2 are chamfering to the required depth. After the pushing element of the rod with its large diameter passes through the smallest internal opening of the cutting elements 2, the last

together with the rod 4, they pass through the hole of the part, being compressed due to the elastic deformation of the petals of the housing 1. After the passage of the hole, the cutting elements under the influence of the elastic forces are opened. Then include reverse feed. The cutting elements with their upper cutting edges abut the lower edge of the hole and the process is repeated.

The proposed tool is characterized by simplicity of design and can be used

for processing any parts, including for processing holes in the brackets, in the walls of closed cavities that have. any dimensions.

Claims (1)

TOOL FOR REMOVING CHAINS FROM TWO SIDES OF THE HOLE, comprising a hollow body with spring-loaded cutting elements capable of radial movement, the cutting edges of which are located at an angle to one another, the tail part and the stem with a spreading element, fixed from rotation relative to the body and installed inside it with the possibility limited axial movement and interaction with inclined surfaces made on the inside of the cutting elements, characterized in that, in order to simplify Design, tail portion disposed on the plunger opposite the Extension member having the shape of two truncated cones with a common large base, and the inclined surfaces have a profile, the profile pushes the return element.