SU1227352A1 - Cutting tool - Google Patents

Description

The invention relates to metal working.

The purpose of the invention is to increase the cutter durability by increasing the reliability of fastening the cutting plate, as well as reducing the labor intensity of the cutter manufacturing.

Figure 1 shows the rezed, plan view; figure 2 is a view of And figure 1; on fig.Z - section bb in figl.

In the nest of the holder 1, there is a movable lining 2 and a cutting plate 3, mounted on the plft 4, pressed into the lining 2. The lateral surface 5 of the cutting of the plate 3 contacts the support wall 6 of the holder 1.

From the supporting surface of the movable lining 2 under f to the supporting wall 6 of the holder slot, a groove 7 is made. The supporting elements 8 and 9 of the holder 1 are installed in the nest of the holder I by its supporting wall 6 and the pin 4 of the mobile lining 2. Side surfaces of the supporting elements 8 and 9 interact with the corresponding wall 10 of the groove 7 of the lining 2. The axes of the supporting elements 8 and 9 of the holder 1 are located in a plane inclined to the supporting wall 6 of the nest of the holder 1 at the same angle φ, the value of which is equal to the self-sealing angle. The side surface of one of the supporting elements (9) is located tangentially to the supporting wall b of the holder's socket 1. The pads 1 and 12 of the contact of the side surfaces of the supporting elements 8 and 9 of the holder 1 with the wall 0 of the groove 7 of the movable lining 2 are located in the area bounded by the vertices (a, in, c, d) reznup1, her plate 3.

The mounting of the supporting elements 8 and 9 in the holder's nest 1 between its supporting wall 6 and the pin 4 of the movable lining 2 enhances the durability of the cutting plate by approximating the areas of application of the reinforcing force of the plate 3 and the lining 2 to the working tip A of the cutter, which reduces the turning

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the plate moment arising during cutting increases the rigidity of the mount and reduces the oscillation of the cutter parts during the cutting process. The arrangement of the supporting elements 8 and 9 in such a way that the side surface of one of them (9) is tangent to the support wall 6 of the holder I provides an increase in durability of the cutting plate due to the location of the groove 7 of the movable lining 2 under the non-working area of the cutting plate 3, since possible for a replaceable multifaceted carbide plate, the cutting depth is 2/3 of the length of the edge of the cutting plate. In addition, the laboriousness of making the cutter is reduced by placing the supporting elements 8 and 9 on the open bearing surface of the holder pocket 1.

The location of the pads 1 i and 12 of the contact surfaces of the side elements of the support elements 8 and 9 of the holder 1 with the wall 0 of the groove 7 of the movable lining 2 in the area bounded by the vertices (a, b, c, d) of the cutting plate 3 provides for an increase in the crease rigidity of the plate due to reducing the plate spreading moment arising during the cutting process, which increases its durability.

The cutting plate 3 is fixed on the tool by pressing it in the direction of the cutting force Px, perpendicular to the main cutting edge 13 of the tool, while the lining 2 is displaced deep into the holder slot 1 and the pin 4, moving with the lining 2 in the direction of the support the holder’s nest walls 6, clamps the cutting plate 3. When the cutting tool is inserted into the workpiece, the cutting force additionally clamps the cutting plate 3 in the holder 1 with a force the greater, the greater the cutting force, and the clamping force remains even after ezani. The loosening of the plate 3 is carried out by lightly tapping the protrusion 14 of the lining 2 in the feed direction.

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FIG.

Editor E. Kopcha Zaka 1990/12

Soe gavite.p V. Gold

Tehred I. VeresKorrektor M. Demch to

Circulation 1001 Subscription

VNIIPI USSR State Committee

for inventions and discoveries

113035, Moscow, Zh-35, Raushsk nab. 4/5

Branch PPP "Patent, Uzhgorod, st. Project, 4

FIG. 3

Claims (3)

1. A CUTTER containing a holder, a cutting insert mounted in a holder socket on a pin of a movable lining and secured by supporting elements with lateral surfaces for interacting with a groove of the movable lining located at an angle to the supporting wall of the holder, characterized in that, in order to increase the resistance the cutter by increasing the reliability of attachment of the cutting insert, the supporting elements are placed in the holder holder between the supporting wall and the pin of the movable lining. 2. The cutter in π. 1, characterized in that the lateral surface of one of the supporting elements is located tangent to the supporting wall of the holder. 3. The cutter in π. 1, characterized in that the contact area of the side surfaces of the support elements with the groove of the movable lining is placed in the area bounded by the tops of the cutting insert. FIG. 1 No. Yu M SO SI Yu