SU1465192A1 - Milling cutter mandrel - Google Patents

Abstract

The invention relates to the processing of metals by cutting and can 6biTbv used to attach the cutters when machining on milling and other machines. The purpose of the invention is to reduce the beating of the cutter relative to the axis of the mandrel by eliminating the gaps between it and the body. The milling mandrel includes a housing 1, bushings 2 and 5, an adjusting ring 3 and a clamping nut 6. A milling cutter 4 is mounted on the cylindrical part of the housing by means of an elastic ring 7 barrel-shaped with radial windows. The cutter is connected with the housing by a key 10 located in the key groove of the housing. The ring 7 with its ends interacts in the process of clamping with the ends in the bores of the sleeves 2 and 5 and the outer surface with the inner surface of the cutter. Since the ring is mounted on the housing without a gap, during the clamping process the cutter beats as little as possible about the axis of the mandrel. 2 Il. § (L

Description

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FIG.

The invention relates to metal cutting and can be used to fasten mills when machining on milling and other machines.

The aim of the invention is to reduce the beating of the cutter relative to the axis of the mandrel in order to eliminate gaps by melody and body.

FIG. 1 shows the mandrel, a general view of a longitudinal section; in fig. 2 is a section A-A in FIG. one.

The milling mandrel includes a housing 1 with a tapered shank and a cylindrical part on which sleeve 2, an adjusting ring 3, a milling cutter 4, and a sleeve 5 are mounted. At the end of the housing 1 there is a thread on which a clamping nut 6 is installed, intended for clamping the cutter 4 by means of sleeves 2 and 5. A barrel-shaped elastic ring 7 is installed between the cutter 4 and the cylindrical part, the length of which exceeds the thickness of the cutter 4. Radial windows 8 are made on the elastic ring, evenly spaced around the circumference. In the sleeves 2 and 5, the bores are made with rifling surfaces 9 designed to interact with the end surfaces of the ring 7. The key 10 is intended to prevent the tool from turning.

A milling mandrel comprising a body with a tapered shank and a cylindrical part with a tongue and groove, mounted on the cylindrical part of the sleeve, designed for borrowing with end surfaces with the face of the cutter, a key to connect the cutter with the body in the transverse plane, an adjusting ring and a clamp a nut, so that, in order to reduce

4 relative to housing 1 when transmitting

torque key spacing 10 - 35 beats of the cutter about the axis is set in cutter 4 for a fixed fit, ki by eliminating gaps between a in the groove, body 1 - by moving the body and the body, the mandrel is equipped with radial windows 8 in the ring 7 - another barrel-shaped ring

are not available to enable keying between body 1

40

45

and a milling cutter 4 (to pass the key) and to facilitate the deformation of the ring 7 when clamping the milling cutter 4.

The keyway in the housing 1 is designed to allow the milling cutter 4 to move along the housing 1 and to transfer torque from the housing 1 to the milling cutter 4.

The ring 7 is installed on the cylindrical part of the housing 1 without a gap, 50 and its ends are perpendicular to the axis of the housing with the accuracy achieved by

with radial windows evenly spaced around the circumference; the ring is mounted on the cylindrical part of the body without a gap, with the possibility of interaction of the outer surface with the inner surface. cutters, and end surfaces - with counter face surfaces of bore holes made in sleeves, the key being fixed in the key groove of the cutter and in the radial window of the barrel-shaped ring with the ability to move along the key groove on the cylindrical part of the body

five

0

five

0

manufacturing. When the ring 7 is compressed by the nut 6, the end is located in the bore of sleeve 2 along the end of ring 7. This ensures perpendicularity of sleeve 2 and body 1, thereby eliminating face beating of sleeve 2 and, consequently, the cutter 4. Sleeve 5 is centered similarly to sleeve 2. A reduction in the end beats of the sleeves 2 and 5 leads to a decrease in the end beats of the milling cutter 4, as a result of which the machining accuracy and tool life are improved.

With further tightening of the nut 6, the ring 7 is uniformly deformed and, expanding, centers the cutter along the axis of the housing 1, and the sleeves 2 and 5 clamp it with their ends.

Claims (1)

Invention Formula A milling mandrel comprising a body with a tapered shank and a cylindrical part with a tongue and groove, mounted on the cylindrical part of the sleeve, designed for borrowing with end surfaces with the face of the cutter, a key to connect the cutter with the body in the transverse plane, an adjusting ring and a clamp a nut, so that, in order to reduce with radial windows evenly spaced around the circumference; the ring is mounted on the cylindrical part of the body without a gap, with the possibility of interaction of the outer surface with the inner surface. cutters and end surfaces with counter face surfaces of bore holes made in sleeves, the key being fixed in the key groove of the cutter and in the radial window of the barrel-shaped ring with the ability to move along the key groove on the cylindrical part of the body. fig.g