Hilti Aktiengesellschaft

Carsten Peters

Markus Hartmann

Guenter Domani

Klaus-Peter Bohn

Bastian Pluemacher

Corinna Achleitner

Florian Schroeder

Mark Winkler

Helene Wesseler

Roland Foser

Zsolt Kosa

Maria Zivcec

Donato Clausi

Josef Starkmann

Michael Brunner

Thilo Hammers

Attila Kenez

Aviral Shrot

Miriam Marxer

Bastian PLÜMACHER

Helene Wesseler Geb Kaps

Attila KENÉZ

Marcel RÖSSNER

Günther Domani

A portable power tool has a tool holder, a motorand an electro-pneumatic striking mechanism. The striking mechanism includes an excitation piston, a striker, a pneumatic chamberfor coupling the strikerto the excitation pistonand an anvilwhich is arranged in the striking directiondownstream of the strikerand is provided for transmitting a blow of the striker to the tool. The anvil is hollow. The hollow interior spaceis closed in the striking directionand counter to the striking direction

Portable power tool

A drill bit for chiselling rock includes an impact face at an insertion end of the drill bit, a hollow shank, where a delivery passage is defined within the hollow shank, and a drill head, where the drill head has a cutting edge, an intake opening, and an intake passage and where the intake passage connects the intake opening to the delivery passage. A first portion of the intake passage which adjoins the intake opening has a first inclination with respect to a drill bit axis, a second portion of the intake passage which adjoins the hollow shank has a second inclination with respect to the drill bit axis, and the second inclination is greater than the first inclination.

Drill for chiselling rock

A drill bit includes a drill bit head, a multi-strand helix made up of three or more helix ribs, and a shank end along a drill bit axis. The multi-strand helix is made up of a conveyance area, a helix gradient, and a pitch. The helix ribs extend parallel to the drill bit axis in a first area adjacent to the drill bit head and a second area adjacent to the shank end.

Manufacturing process, tool stand, and drill bit

The chisel includes a tip (), a working section (), and an impact surface (), and a longitudinal axis () that extends through the tip (), the working section (), and the impact surface (). The working section () includes multiple webs () that extend along the longitudinal axis () and that are distributed about the longitudinal axis () in the circumferential direction (). For at least one of the webs (), a dimension () in the circumferential direction () increases by at least one-third with increasing distance () from the longitudinal axis (). The webs become significantly wider toward the outside and thinner toward the longitudinal axis.

Chisel

A control method for a borehole flushing module () for a chiseling tool (), includes the steps: Providing fine-grain particles in a dispenser (); ascertaining a material (M) at a location processed by the tool () with the aid of a material detector (); and introducing fine-grain particles at the location of the substrate processed by the tool () when the material detector () ascertains an iron-containing material (M).

Control method and borehole flushing module

A method for producing a drill includes cold forming of a rod-shaped blank to form a semifinished product having three or more rectilinear longitudinal ribs extending along a longitudinal axis of the semifinished product, introducing the longitudinal ribs into a first die and a second die in a working direction, where the first die bears against the longitudinal ribs in a direction of rotation about the longitudinal axis and the second die bears against the longitudinal ribs counter to the direction of rotation, pivoting the first die in the direction of rotation in relation to the second die in order to twist the longitudinal ribs between the first and second dies, pulling the longitudinal ribsthrough the pivoted first die and the second die counter to the working direction in order to twist the longitudinal ribs and apply a drill head to the rear end in the working direction.

A control method for a bore-chiseling portable power tool for machining a substrate by a drill bit includes superimposing a periodic striking on the drill bit at an impact rate and a rotating of the tool holder at a rotational speed in a rotational direction, identifying a material of the substrate being machined by the drill bit by a sensor, adjusting the rotational speed and/or the rotational direction to a first rotational speed and a first rotational direction when the identified material is an iron-based material, and adjusting the rotational speed and/or the rotational direction to a second rotational speed and a second rotational direction when the identified material is a mineral material. The first rotational speed is less than the second rotational speed and the first rotational direction is counter-clockwise and the second rotational direction is clockwise.

Control method and portable power tool

A method for producing a twist drill has the following steps. A blank is shaped to form a semi-finished product. The semi-finished product is formed from a core, coaxial with the drill axis, having a radius and a number of webs, arranged on the core, having a height. The semi-finished product has a constant cross section along the drill axis. The webs have a first portion which adjoins the core and in which a width of the web remains constant or decreases in the circumferential direction with increasing radial distance from the drill axis. The webs have a second portion which adjoins the first portion and in which the width of the web increases in the circumferential direction with increasing radial distance from the drill axis. The webs of the semi-finished product are shaped into helical segments using a plurality of rolling tools that annularly enclose the semi-finished product and roll on the webs along the drill axis. The rolling tools have teeth that are inclined with respect to the drill axis. A height of the helical segments is less than the height the webs. Helical segments formed from adjacent webs are in contact with one another in a closing fold. The invention also relates to a twist drill.

Twist drill and production method

The twist drill () has a drilling head (), a continuous two-flute, three-flute to six-flute helix () and an insertion end () that are arranged consecutively on a drill axis (). The helix () has a radial outer dimension () that varies periodically two, three to six times per revolution around the drill axis (). The invention also relates to a production method for such a drill.

Growing community of inventors

Sax, Switzerland

Carsten Peters