CS245632B1 - Single-point drill bit grinding machine for impact drilling - Google Patents

Abstract

The solution relates to a device for grinding single-edged drill bits for impact drilling, the essence of which is that single-edged drill bits are mounted on a rotating magazine and are carried along a circular path, while during their movement they are ground from one side. In the space outside the grinding wheel they are rotated by 180° around their axis and ground from the other side.

Description

BACKGROUND OF THE INVENTION The invention relates to a device for grinding wedge-shaped blades of single-edged drill bits for hammer drilling in stone.

The prior art device for grinding the wedge edge of single-edged drill bits is single-purpose, where the single-edged drill bit is separately clamped and the grinding takes place by a motor-driven grinder mounted on a lever system with manual rocking movement while manually adding removal.

Another method of grinding single-ended drill bits for percussive drilling is by grinding the drill bits individually individually. followed by a template check.

A disadvantage of the existing single-purpose device is the lengthy preparation during clamping and adjustment before grinding of individual pieces, which are uneven both in size and in the amount of wear of the wedge-shaped blade.

Grinding of drill bits by hand results in inaccurate grinding geometry. Vibrations often lead to occupational diseases, so work breaks must be ordered and working time extended.

The above-mentioned disadvantages of the prior art can be substantially reduced by the device according to the invention, which consists in that it consists of a rotatable magazine of clamped drill bits, the grinding surface of which is circumferentially extending to the grinding wheel. wherein the drill bit clamping device is adapted to gradually rotate the individual drill bits by 180 ° during rotation of the rotary magazine.

The advantage of the percussion drill grinding device according to the invention is to increase the productivity of work due to the gradual grinding of single-bit drill bits without down-time for clamping and adjustment, with the possibility of replacing the cut pieces with cutting edge.

An example of an embodiment of the device for grinding single-ended impact drill bits according to the invention is shown in the attached drawing, where a schematic view is shown.

In the rotary magazine 2, the drill bits 11 are clamped, to whose ground surface the cutting edge 3 is gripped by a grinding wheel 3, which is pivotable on the movable device 6. The movable device 4 is coupled with feedback 5 kinematic to the movement of the rotary magazine 2.

The clamping device of the drill bits 2 is adapted to gradually rotate the individual bits 180 ° during the rotation of the rotary magazine 2.

During the actual grinding operation, the grinding wheel 2 is pressed against the ground drill bit 2 by an optimally adjusted force. Before moving out of range of the grinding wheel 2 ^e j spaced from the path of drill bits stored · 1 to prevent the approaching side of a grinding wheel 2 to the next-approaching the drill bit 2 ·

Only when this subsequent drill bit 7 is in the working space of the grinding wheel 2 does it move into the working position. The rotary magazine 2 performs a continuous rotational movement.

The invention can be used in particular for grinding unevenly worn single-edged bit bits for hammer drilling.

Claims (1)

Apparatus for grinding single-edged drill bits for percussion drilling, with a continuous passage in front of the grinding wheel circumference, characterized in that it consists of a rotatable magazine (2) of clamped drill bits (1), to the grinding surface of which pivotable on the movable device (4), which is feedback-linked (5) kinematically with the movement of the rotary magazine (2), wherein the drill bit clamping device (1) is adapted to gradually rotate the individual drill bits (1) 180 ° during rotation rotary magazine (2).