RU1815003C - Hole-enlarging device - Google Patents

Abstract

Usage: in the processing of metals by cutting, in particular in the processing of radial holes in pipes after gas cutting. SUMMARY OF THE INVENTION: A guide 5 with knives 6 is attached to the spindle 1. A stop 9 is fixed in the grooves 7 of the petals 8, which is rigidly connected to the axis 10. The rod 14 is placed in the through radial hole of the axis 10 and connected via the sleeve 15 and bearings 16 to the housing 17 By means of a threaded connection, the housing 17 is connected to a sleeve 20 connected to the spindle 1 by means of a pin 23. The housing 17 is connected to an axial displacement drive. 6 ill.

Description

The invention relates to the processing of metals by cutting and can be used to remove the influx of metal and burr in the radial holes of the pipes after gas cutting, for example, in boiler building.

The aim of the present invention is the processing of radial holes in pipes with deviations from concentricity, removal of burr, the possibility of processing holes in a wide range of diameters without tool readjustment, and increasing productivity during processing.

To achieve this, in a countersink device, comprising a spindle, a guide, knives, an abutment, a housing, a cup, an axial displacement drive, new is that the four knives are located in T-slots; grooves are located at an angle to the axis of the spindle; the knives are interconnected movably with emphasis using radial grooves; the emphasis is connected to an axle movably in an axial direction in a guide; the axis, with the help of a rod passing through it radially, of a sleeve, thrust bearings, housing, is kinematically connected by an axial displacement drive; the spindle through a pin, a sleeve, thrust bearings, is connected to a glass, which is connected to the housing with a thread.

A positive effect here is achieved due to the radial feed of knives with simultaneous axial feed during processing, a wide range of diameters to be machined or the possibility of processing a large allowance, the ability to process radial holes in pipes with a significant deviation from concentricity.

Figure 1 shows a device for countersinking, section; figure 2 is a section aa in figure 1; in Fig.Z - section bB in Fig.5; figure 4 is a section bb in fig.Z; 5 is a view along arrow G in FIG. 1; figure 6 is a view along arrow D in figure 1.

The device consists of a spindle 1 with a Morse taper 2, which enters the spindle of the drilling machine 3 and is mounted on the machine spindle using a wedge 4.

Guide 5 is rigidly attached to the bottom of the spindle. T-shaped grooves are made in the guide 5 of the oblique axis, in which the knives are placed 6. Horizontal grooves are made in the bottom of the knives 7. An emphasis 9 enters into the grooves 7 with its petals 8. The stop 9 is rigidly attached to axis 10. Axis 10 passes through the central hole of guide 5.

In the lower part of the spindle 1, an axial hole 11 is made, where the head 12 of the axis 10 enters.

At the level of the hole 11, radial oval windows 13 are made.

A through radial hole is made in the head 12 of the axis 10, into which the rod 14 enters.

The rod 14 passes through the windows 13 and 0 is connected to the sleeve 15. located between the two thrust bearings 16. The bearings are placed in the housing 17 and are pressed down from the bottom by the nut 18.

In the case 17, the concentric axis is made 5 yen thread 19.

By thread 19, housing 17 is connected to cup 20.

In the cup 20, two thrust bearings 21 are placed, between which there is a sleeve 22, which covers the spindle 1.

The sleeve 22 is rigidly connected to the spindle 1 by means of a pin 23.

The bearings 21 are bounded from above by 5 axial movement by a cover 24, which is connected to the cup 2 by means of a thread 19.

An axial displacement drive in the form of a handwheel 25 is rigidly connected to the housing 17. 0

With the glass 20, the rod 26 is rigidly connected.

The housing 17 with its outer surface enters the bore of the bracket 27, which is firmly attached to the table of the drilling machine.

The work of the countersinking device is as follows:

Rotating the handwheel 25 clockwise, when viewed from above, move the housing 17 assembly with the other parts as far down as possible, while the axial force is transmitted through the bearings 16 and the sleeve 15, the shaft 14, the axis 10, the stop 9 to the knives 6. in this case, the rod 14 slides in the radial 5 direction to the center and at the same time the minimum Sanker diameter is established.

When the handwheel 25 is rotated, the beaker 20 by means of a leash 26 is kept from 0 by rotation by the device associated with the unsuitable. the moving part of the machine.

This may be a bracket with a vertical groove, where the leash 26 enters.

This bracket is not shown. 5 Moving the housing 17 down when the handwheel 25 is rotated clockwise when viewed from above occurs with the right thread 19.

The movement of the housing 17, and ultimately the radial movement of the knives, can occur regardless of whether the spindle 1 rotates or not.

After setting the minimum size of the Sanker, the entire device, together with the machine spindle, is lowered down to the hole to be machined.

If necessary, the hole of the workpiece is centered with respect to the Zenker axis by touching the cutting edges of the knives 6 to the edge of the hole.

After that, the spindle rotates.

By rotating the handwheel 25 counterclockwise, the housing 17 is screwed onto the beaker 20, while the housing 17 moves up.

Through the bearings 16, the sleeve 15, the rod 14, the axis 10, the stop 9, the axial movement is transmitted to the knives 6, which, moving along the T-shaped grooves, are simultaneously moved in the radial direction at which the hole is machined.

Control of the end of processing is carried out by the angular position of the handwheel 25.

The brackets 27 are perceived by the radial cutting forces arising from the machining of the holes with a deviation from concentricity.

The implementation of the device for countersinking in this form allows the processing of radial holes in pipes having large deviations from concentricity, the possibility of processing hole diameters in a wide range or with a large allowance, and also increase labor productivity due to simultaneous radial and axial feed.

Claims (1)

The claims A countersinking device comprising a guide connected to the spindle, in the grooves of which there are placed knives with the possibility of movement in the axial and radial directions, the guide being connected to the axial movement drive, which makes it easy to move. c, in order to expand technological capabilities by treating radial holes in pipes having deviations from alignment due to bursts and burrs after gas cutting, the device is equipped with placed coaxially with the spindle, an axis rigidly connected to the last stop, on one end of which there are petals intended for placement in horizontal grooves, which are made in knives, connected to the axis by a rod placed in windows that are made in the spindle perpendicular to the axis, rigidly associated with the shaft sleeve intended for contact with the latter bearings, covering the last contacts with the last bearings, covering the latter body, kinematically connected to the axial displacement drive, a cup mounted coaxially with the housing with the possibility of axial displacement relative to the latter and connected to it by means of a threaded connection placed in the cup by an additional sleeve, designed dl contacting the latter with additional bearings and a pin rigidly connected to the additional sleeve fixed in the spindle perpendicular to the latter, with grooves in the guide made by T-shaped. fi g. 2 fig.Z fojr ViewD