SU1255289A1 - Arrangement for chamfering at two sides of opening - Google Patents

Description

The invention relates to metal cutting and can be used for chamfering in the holes of parts from the front and back side in one working stroke.

The purpose of the invention is to expand the technological capabilities of the device.

Fig. 1 shows the structure of a chamfering device; Fig. 2 shows the position of the tool after chamfering off the front side of the de-waist and Ekhoda in the hole; in fig. 3.- tool position on the back side of the part after the passage of the hole.

The device for chamfering on both sides of the hole comprises a housing 1, a tool made in the form of a hollow cylinder 2 with spring-loaded cutting elements 3 having a rod 4 that can radially move, fixed against rotation of the tool’s hollow cylinder and mounted inside it with the possibility of axial movement. On the outer side of the housing 1, a sleeve 7 is installed, which is axially spring-loaded at both ends with springs 5 and 6 of the same rigidity.

In addition, the hollow cylinder 2 of the tool is mounted in the housing with the possibility of axial movement and is connected rigidly with the sleeve 7. On the inner side of each cutting element 3 in its middle part between the cutting edges there is a supporting step

8dl interaction with a stepped cylindrical for Skom 9 shank stem 4.

Cylindrical Position

9, the rod 4 with respect to the support stage 8 of the cutting elements 3 is adjusted by nuts 10, and the force of the spring: nuts I1 and 12.

To obtain the same chamfer size, the cylindrical juice 9 of the stem A must be set to the middle position of the support stage 8 from the front and back side of the part hole.

If it is necessary to obtain different chamfer sizes on both sides of the part, the position of the cylindrical rod 9 of the rod 4 relative to the support stage 8 is adjusted accordingly.

Obtaining the required chamfer sizes is achieved by adjusting usi

five

0

five

LI springs 3 and 6 ikey 11 and 12.

The device works as follows.

The device is fixed in the spindle of the machine. The springs 5 and 6 are pre-adjusted for a certain force. When the cutting elements 3 of the tool meet with the face of the face of the part in connection with the occurrence of cutting forces, the chamfer will be removed in the hole, the axial movement of the body 1 will be greater than the axial movement of the hollow cylinder 2, and therefore the spring 6 will compress and the spring 5 will expand . The rod 4, which is rigidly connected to the housing 1 by means of the pin 13 and the nuts 10, is moved relative to the hollow cylinder 2.

At the moment when the cylindrical juice 9 comes out of the support step 8 and ends up in a large hole, the chamfering stops and the edges of the cutting elements 3 slip off the surface of the chamfer, they will be compressed and enter the part hole. After passage of the hole and exit of the tool from the back side of the part at the end, the spring 6 begins to unclamp, returning the hollow cylinder 2 to its original position, in which the cylindrical juice 9 of the stem 4 takes a middle position in the support stage 8 (the case when chamfers from both

The 5 sides of the parts are the same). In this case, the spring 6 returns to its original position and is balanced by the spring 5.

When the tool is moved to the opposite side, the cutting elements 3 will begin to chamfer in the hole on the back side of the part, and the cylindrical juice 9 of the rod 4 will exit from the support stage 8 of the hollow cylinder 2, while the spring 5 will compress and the spring 6 will unclamp. At the moment when the juice 9 of the rod 4 enters the large opening of the hollow cylinder 2,

The chamfer stops at 0, the cutting elements 3 are pressed and the tool will exit the hole being machined.

After exiting the hole under

5 the action of the springs 5 and 6 cylindrical juice 9 of the rod 4 will occupy a middle position in the support stage 8 of the hollow cylinder 2.

0

If it is necessary to obtain chamfers of different sizes on the front and back of the part, the cylindrical juice 9 is displaced respectively by nuts 10 and the dimensions are achieved by adjustment and test passes.

The chamfer size can be adjusted depending on the length of the cylindrical shaft 9 of the rod 4. The chamfer size can be adjusted from O to L, as for the chamfer corners, the required drawing, the chamfer angle on the workpiece coincides with the angle

scrap in terms of cutting edges 3. For example, if the chamfer on the part must (be made at an angle of 45 °, then the angle in terms of cutting edges is also 45 °, since they are closed on the cylindrical section 9 of the rod 4.

The proposed solution will allow you to get chamfers with the required linear size in depth, will allow you to change the size of the chamfer, for example, only blunt sharp edges, or chamfer with different sizes on both sides of the hole.

cfiusJ

FIG. 2

fig.Z

Claims (1)

DEVICE FOR REMOVING CHAINS FROM TWO SIDES OF THE HOLE, comprising a housing on which a tool in the form of a hollow cylinder with cutting elements mounted with the possibility of radial movement is fixed and a rod placed inside the tool with the possibility of axial movement and interacting with the inside of the cutting elements, characterized in that, in order to expand technological capabilities, the tool is made with a supporting step located between the cutting edges of each cutting element with the inner thoron interacting with the shank formed on the stepped cylindrical rod belt, and the device is provided with a spring-mounted in the housing at both ends of the sleeve associated with the tool and the mechanism for adjusting the axial position of the cylindrical § girdle the stem relative to the support stage. Yu sl sl KZ 00 s