SU812428A1 - Apparatus for working hole edges - Google Patents

Description

one

The invention relates to the machining of metals by cutting.

A device for processing the inner edges of the through holes in closed tanks and hard-to-reach places, contains a mandrel on which a knife is installed, which can be rotated},

The disadvantage of this device is the inability to ensure the processing of edges of a given value.

Closest to the proposed device for processing the edges of the holes, comprising a tool and copy rollers, housed in a housing that is mounted on the shaft so that it can move along the axis of the shaft 2.

The disadvantage of this device is that when machining the edges of the holes on the back side, it is necessary to remove the cutting tool with a copy roller, which greatly reduces labor productivity. In addition, the specified device does not provide processing edges of a given value.

The purpose of the invention is to increase productivity and ensure

processing of edges of a given value from two sides of the hole;

This goal is achieved in that the device is equipped with a mechanism for radial reciprocating movement of the holder with a tool made in the form of a slider, kinematically associated with the holder and receiving reciprocating movement by means of a follower support interacting with the surface of the hole.

The drawing schematically shows the proposed device.

five

The device consists of a body 1 with a shank 2 for mounting in the spindle 3 of the machine. In case 1, a slider 4 is installed with an adjustable follow-up stop 5. Between the slider

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4 and the casing 1 houses the springs 6, which are capable of creating a force exceeding the cutting force that occurs during edge processing, and screws 7 are provided to adjust this force

5 in the housing 1 is diametrically opposed to the adjustable follower

5 there is a holder 8 with a cutting tool 9, which is pivotally connected with the half-cutter 4 via a different arm 10, located on the axis

11, and a pin 12 connected to the lever 10 by the axis 13. The cutting tool 9 is fixed in the holder 8 by a bolt 14 A nut 15 is provided for fixing the follow stop 5, and the dipstick 17 is used to set the required amount of removable metal from the edge of the hole of the part 16.

The device works as follows.

When processing the edges of the hole in the part 16, the device is fixed by the shank 2 in the spindle 3 of the machine, after aligning the axis of the hole 16 and the device. The following anvil 5 is installed in the device so that its outreach corresponds to the diameter of the hole in the part 16, taking into account the size of the metal layer to be removed, and is fixed by the nut 15.

For setting: the device to the required amount of metal layer to be removed, the spindle 3 moves in the axial direction until the next abutment 5 touches the probe 17, having a thickness equal to the size of the metal layer to be removed.

The cutting tool 9 is exposed so that its cutting edge touches the edge of the workpiece hole 16, and is fastened with the bolt 14.

After adjustment, rotation and longitudinal feed-spindle 3 of the machine are included. The cutting tool 9 starts the removal of the metal, and the next abutment 5 does not come into contact with the part 16 until the metal layer J = Ila equal to the gap set is removed. At the moment of the formation of the required size, the follower abutment 5 comes into contact with the part 16. The cutting tool 9 obtains a radial movement until the upper abutment 5 of its tip moves to the surface of the hole. This is achieved by the fact that the lever 10 has a smaller shoulder on the side of the stud 12, therefore.

the radial movement of the cutting tool 9 is larger than the follower stop 5, and therefore the formation of marks from the top of the cutting tool 9 on the surface of the hole of the part 16 is avoided.

When the device exits from the opposite side of the spring hole, the heel 4 with the following abutment 5 and the holder 8 with the cutting tool 9 are returned to the initial position

The reciprocating movement of the cutting tool, obtained from the movement of the follower stop through the equal-lever lever, allows the edges of the holes to be machined from two sides to a given size without moving parts and tools, as well as in closed tanks and hard-to-reach places.

Claims (2)

1. USSR author's certificate number 517399, cl. B 23 B 5 / L6, 1973. 2. Authors certificate of the USSR 525499. cl. B 23 B 5/16, 1975. uttsh /