SU844157A1 - Apparatus for drilling holes - Google Patents

Description

one

The invention relates to machining and can be used when drilling holes of small diameter and large length, for example, on lathes according to the scheme: the part rotates, the drill does not rotate.

A device for drilling holes, made in the form of front and tailstocks and a tool guiding mechanism 1 fixed on a frame, is known.

Its disadvantage is the reduction of the active (working) length of the drill during processing, which determines the depth of drilling of the holes.

The purpose of the invention is to provide the greatest drilling depth by increasing the active part of the tool.

This is achieved by the fact that the tool guiding mechanism is fixed on the frame and is made in the form of two walls, one of which is stationary, and the second wall is spring-loaded and mounted for movement on the guide rods inserted into the device fixed to the fixed wall.

FIG. 1 shows a device for drilling holes in the initial drilling period; in fig. 2 - the same during the end of drilling the part.

The device for drilling holes comprises a fixed wall 1 on which two guide rods 2 are fixed, carrying a movable wall 3 supporting the drill bit 4. The wall 3 is pressed by the spring 5 to the extreme position. The wall, 1 is fixed in the rack 6 of the machine. In the cams 7, the part 8 is clamped. The drill 4 is fastened in the chuck 9.

 When drilling the part 8 clamped in cams 7 and rotating with frequency p, the drill 4 fixed in chuck 9 is guided by wall 1 and supported by wall 3 to prevent buckling due to the non-rigidity of the drill. During the processing of the part 8, the cartridge 9 moves with the tailstock, with feed S and, with sufficient displacement, begins to contact with its end face

the moving wall 3, moving it along the rods 2 up to full approach to the fixed wall 1. At the end of drilling (Fig. 2), the spring 5 is in a compressed state, and the movable 3 and the fixed 1 wall can contact. Further advancement of the drill becomes impossible, and at the moment of contact of the walls 1 and 3, the machine should turn off and drill 4 out of the hole

Details 8. The application of the proposed device for drilling deep holes of small diameter has significant advantages: the rigidity of small diameter drills increases due to the use of a moving wall, an increase in the effective (working) part of the drill is provided.

Form-ul invention

A device for drilling holes, made in the form of front and rear headstock and a tool guiding mechanism fixed on the frame, characterized in that, in order to ensure the greatest depth of drilling by increasing the active part of the tool, the tool guide mechanism is fixed on the frame and made in the form of two walls one of which is fixed, and the second wall is spring-loaded and mounted for movement on guide rods inserted into the device fixed to the fixed wall. Information sources,

taken into account during the examination 1. I. Veremeychuk. Continuous drilling of deep holes, -M .: 1940, p. 255, FIG. 234.

Phage. 2

Claims (1)

Claim A device for drilling holes made in the form of front and rear headstock mounted on a bed and a tool guiding mechanism, characterized in that, in order to ensure the greatest possible drilling depth by increasing the active part of the tool, the tool guiding mechanism is mounted on the bed and made in the form two 5 walls, one of which is stationary, and the second wall is spring-loaded and mounted with the possibility of movement on the guide rods inserted into the device, mounted on a fixed wall. 10 Sources of information taken into account during the examination 1. I. Veremeychuk. Continuous drilling of deep holes, - M .: 1940, p. 255, FIG. 234.