Abstract:
A cutting assembly is configured to be coupled to a drum that is rotatable about an axis. The cutting assembly includes a block having a leading surface and an inner surface. The inner surface forms a block bore extending along an axis through the leading surface and at least partially through the block. The cutting assembly also includes a sleeve having a sleeve shank with an outer surface, a flange, and a sleeve bore extending through the flange and at least partially through the sleeve shank. During installation of the sleeve to the block, an interface between the outer surface of the sleeve shank and the inner surface of the block bore transitions from an interference fit to a clearance fit.
Abstract:
The present disclosure relates to a cutting bit carrier (100) for hard rock mining applications. Usually, replacing worn cutting bits may take much effort and may be time consuming. The present cutting bit carrier (200) may comprise a first carrier member (110) including a first supporting portion (114) configured to contact a cutting bit shank (204) of a cutting bit (200) for supporting the cutting bit (200), and a second carrier member (120) including a second supporting portion (124) configured to contact the cutting bit shank (204) of the cutting bit (200) for supporting the cutting bit (200). The second carrier member (120) may be detachably mountable to the first carrier member (110).
Abstract:
Die Erfindung betrifft eine Werkzeugeinrichtung (11) für eine Bodenfräsmaschine (1), insbesondere eine Straßenfräse, einen Recycler, einen Stabilisierer oder einen Surface-Miner. Die Werkzeugeinrichtung (11) umfasst einen Fräsmeißel (14) mit einer hochverschleißfesten Meißelspitze (17), insbesondere umfassend PCD-Material, und einem sich entlang einer Längsachse (35) erstreckenden Meißelschaft (20), und einen Meißelhalter (29) mit einer Schaftaufnahme (26), wobei der Meißelschaft (20) des Fräsmeißels (20) zumindest einen sich in Richtung von der Meißelspitze (17) weg verschmälernden Verjüngungsabschnitt (23) aufweist. Weiterhin ist eine Befestigungsvorrichtung (19) vorhanden, die derart ausgebildet ist, dass sie den Fräsmeißel (14) entlang seiner Längsachse (35) und in Richtung von der Meißelspitze (17) weg in die Schaftaufnahme (26) hinein zieht, wobei die Schaftaufnahme (26) des Meißelhalters (29) derart komplementär zum Meißelschaft (20) des Fräsmeißels (14) ausgebildet ist, dass der Verjüngungsabschnitt (23) im durch die Befestigungsvorrichtung (19) verspannten Zustand reibschlüssig in der Schaftaufnahme (26) am Meißelhalter (29) anliegt. Der Meißelhalter (29) umfasst zudem einen Grundhalter (12) und einen Wechselhalter (13), wobei der Grundhalter (12) eine Halteraufnahme (37) zur Aufnahme des Wechselhalters (13) und der Wechselhalter (13) die Schaftaufnahme (26) umfasst und die Befestigungsvorrichtung (19) derart ausgebildet ist, dass sie sowohl den Fräsmeißel (14) entlang seiner Längsachse (35) und in Richtung von der Meißelspitze (17) weg in die Schaftaufnahme (26) hinein als auch den Wechselhalter (13) in die Halteraufnahme (37) im Grundhalter (12) hinein zieht. Die Erfindung betrifft weiter einen Fräsmeißel und einen Wechselhalter für eine derartige Werkzeugeinrichtung und eine Bodenfräsmaschine mit einer derartigen Werkzeugeinrichtung.
Abstract:
The invention relates to a chisel (10) having a chisel head (11) and a chisel shaft (17), wherein near its end facing away from the chisel head the chisel shaft has a threaded portion having a thread (19), wherein the chisel head holds a chisel tip (20) made of a hard material, and wherein near the side facing the chisel shaft the chisel head is provided with a supporting surface (15). Especially when superhard hard materials are used for the chisel tip, a load-optimized chisel design is obtained by a domed supporting surface (15).
Abstract:
A pick assembly is provided, comprising a bit assembly and a holder assembly; the bit assembly comprising a bit support body, a fastener mechanism and a deflectable member, cooperatively configured such the deflectable member can be deflected responsive to the progressive coupling of the bit support body to the fastener mechanism. The holder assembly comprises a holder body and is configured for accommodating and retaining the bit assembly by interference means. The holder assembly and bit assembly are cooperatively configured such that the retention of the bit assembly by the holder assembly by interference means can be progressively increased responsive to the progressive coupling of the bit support body with the fastener mechanism when the bit assembly is accommodated by the holder assembly, operative to prevent substantial movement of the bit support body relative to the holder body in use.
Abstract:
Mineral bits (10, 100) and associated mounts (30, 116, 200) for use during excavation and mining operations are disclosed. An exemplary bit (10) has a front region (12) and an opposite rear region (14) and comprises a head portion (16) and a mounting portion (18) secured to the head portion (16). The mounting portion (18) can be configured to be releasably retained by a mount (30). A rounded transition (22) disposed in the front region (12) of the bit between the head portion (16) and the mounting portion (18) provides a clearance (C) between the head portion (16) and the mount (16). Mineral bits (10, 100) disclosed can be inserted into and withdrawn from mounts (30, 1 16, 200) by linear and/or rotational movement.
Abstract:
An insert (110) for a degradation assembly comprising a holder, the insert (110) comprising a tip (112), a coupler mechanism (114) for moveably coupling the insert with the holder, and an alignment mechanism operable to urge the tip (112) towards an aligned orientation within the holder; the aligned orientation being with respect to a forward direction (M) in which the insert (110) is to be driven in use.
Abstract:
The present invention relates to a shearer pick. More particularly but not exclusively it relates to a shearer pick for use on a rotating cutting head of a coal mining apparatus. Wherein the shearer pick body is composed of an alloy comprising by weight at least 60% copper and 40 % or less nickel.
Abstract:
The pick (1) includes a radially inner end (4) and a shank (3) to be fixed to the drum (10) to substantially prevent relative movement between the pick (1) and drum (10). The pick (1) further includes a cutting head (2) having leading (5) and trailing faces (6) intersecting to provide a cutting edge (8) to extend generally parallel to an axis. The leading face (5) in use is inclined by an acute rake angle R to a radius of the axis, with the trailing face 6 being inclined at an acute back clearance angle B to a plane passing through the edge (8) and normal to the radius. The leading face (5) and trailing face (6) being inclined by an acute angle and the shanks when fixed to the drum (10) extends at an acute angle to the radius.
Abstract:
An excavation cutting toolholder retention system (100). The cutting toolholder retention system (100) includes a cutting toolholder (108) having a flange recess and a holder engagement surface (140) and a support block (102) having a toolholder bore (104) into which the cutting toolholder is inserted and a block pin bore (106) intersecting the toolholder bore, the block pin bore (106) defining a block engagement surface (164) which is inclined downwardly relative to the toolholder bore. The cutting toolholder retention system (100) further includes a pin (112) having a pin shaft (180), the pin shaft having a pin flange (190) which engages the flange recess so as to limit translational movement of the pin shaft. The pin engages the block engagement surface (164) and the holder engagement surface (140) such that the pin (112) may be moved to draw the cutting toolholder (108) into the toolholder bore (104)