Abstract:
A remanufacturing method of a drill includes providing a drill with a worn-out area. The drill comprises: a shank part; and a flute part arranged on one end of the shank part. A chisel edge is formed on the front end of the flute part, and the radius of any one of the cross section of the chisel edge is defined as a core thickness; a first blade and a second blade with tilt directions toward the shank part are formed on the two sides of the chisel edge. The first circumferential surface of the first blade and the second circumferential surface of the second blade are respectively extended and spiraled toward the shank part along a periphery of the flute part and form two helical cutting edges, a first debris-discharging groove and a second debris-discharging groove. The first blade comprises a first cutting edge. The first cutting edge and the first circumferential surface define the worn-out area. The method also includes a step of aligning a grinding wheel to the worn-out area; and a step of using the aligned grinding wheel to perform a cutting operation along the helical cutting edge or the first debris-discharging groove to grind and repair the worn-out area of the drill.
Abstract:
Apparatus for sharpening a cutting tool. In some embodiments, a tool sharpener includes an abrasive medium having an abrasive surface. A stationary tool support guide provides a guide surface that supports a side of the tool during presentation of a cutting edge of the tool against the abrasive surface. A rotatable edge guide has a roller member with a curvilinearly extending outer surface. The roller member is rotatable about an edge guide roller axis to engage, via rolling contact, the cutting edge during the presentation of the cutting edge against the abrasive surface.
Abstract:
The invention relates to a device (10) for machining work pieces, particularly for sharpening tools with cutters for cutting-machining, such as for example drills, milling tools or the like, the device (10) comprising a monolithic machine block (12) with at least two functional surfaces (14, 16) disposed at an angle with respect to each other, a work piece support arrangement (18) for clamping-in a work piece (38) to be machined, a machining unit (20), on which at least one tool (66, 68, 70) can be attached to machine the work piece (38), and a support (22), on which the machining unit (20) can be displaceably attached, wherein on a first functional surface (14) of the two functional surfaces (14, 16) of the machine block (12) the machine block (12) has at least one first linear guide (24, 26) for guiding a work piece support arrangement (18) along at least one first guide axis (X1), and on the second functional surface (16) of the two functional surfaces (14, 16) of the machine block (12) the machine block has at least one second linear guide (40, 42) for guiding the support (22) for the machining unit (20) along at least one second guide axis (Z1), the first functional surface (14) or the second functional surface (16) being allocated at least one third linear guide (46, 48) for guiding the work piece support arrangement (18) or the machining unit (20) along a third guide axis (Y1), the machining unit (20) being displaceable relative to the support (22), the first, second and third guide axes (X1, Y1, Z1) each extending inclined with respect to the other, the work piece support arrangement (18) being formed with a first axis of rotation (A1) for rotating the work piece (38) and the machining unit (20) or the work piece support arrangement (18) being pivotable about at least one second axis of rotation (C1, C2, B1).
Abstract:
In one aspect, collets are described herein employing a central bore having a stepped architecture. For example, a collet described herein comprises a clamping portion having a central bore for receiving a coupling portion of a cutting tool or cutting tool blank. The central bore has a stepped architecture comprising an inner section of first diameter, a transition section of second diameter, and an outer section of third diameter.
Abstract:
A unibit re-sharpening device for reconditioning the surface of worn unibits by filing them in a tapered recess. The unibit re-sharpening device comprises a device housing having a tapered recess with a diamond infused file therein, with the file connected to an integrated electric motor and high frequency mechanical vibrator, with an attachable collet for securing a conventional unibit in the tapered recess. In use, a unibit is secured in the collet and the collet is placed in the tapered recess. The power switch is then turned on, causing the motor and vibrator to vibrate the file and resulting in material being cut from the cutting edge or face of the unibit by the vibrating file. While the file is vibrating, a user can rotate the unibit to expose its whole conical surface to the file, thereby sharpening the entire unibit.
Abstract:
The invention relates to a reaming tool, comprising a rotationally drivable main body (16) and at least one cutting body (18) fastened thereto. The at least one cutting body has at least one reaming blade (26) at the edge of a rake face (28). According to the invention, a chip-forming step (32) and/or chip-breaking elements (34) are formed in the rake face (28) and the reaming blade (26) has a ground cutting edge (40, 42, 44).
Abstract:
In prior art, an additional radial inward movement that is performed in accordance with a rotating cam disk is imparted on the grinding disk in order to relief-grind the cutting teeth and the chamfer of taps and the cutting teeth of thread formers. The invention relates to a cam disk which can be rotated about an axis and is provided with a control cam. The control cam forms a group of curves according to a large number of possible undercut contours on the grinding teeth of the tap or thread former, which are to be relief-ground. In order to obtain a specific undercut contour on a cutting tooth, a limited angle of rotation is selected from the control cam. The area is mechanically, optically, or electronically scanned by means of a scanning device. To this avail, the cam disk performs an oscillating rotary movement only above the selected section of the control cam. Relief-grinding of the cutting tooth is completed once a fore-and-aft movement has been performed, and the grinding disk returns to the starting position thereof. The result of the scan is transmitted to an electronic control device via a signal line.
Abstract:
The description is given of a molding, in particular for furniture and particularly for seating furniture, which has at least one surface with a number of curves and which consists of a multi-layered material with fibers. According to the invention, a multiplicity of slits are arranged in the at least one curved surface of the molding such that the slits can take up the change in the dimensions of the material in relation to the non-deformed state, with the result that an essentially stress-free state can be achieved without damage to the outer layers of the material in the region of the curved surface.
Abstract:
A drill bit grinding machine including a grinding control device controlled to move the drill bit, permitting it to be ground by the grinding wheel, the grinding control device including a mounting base, a coupling block pivoted to the mounting base to hold a bit holder, a side board coupled to the coupling block, a driven gear controlled to turn the bit holder, an axial movement control block controlled to move the bit holder axially, a tilt angle control device controlled to adjust the tilt angle of the bit holder, and a drive gear controlled to turn the driven gear and the tilt angle control device.
Abstract:
A twist drill sharpener employing a pair of rotary grinding wheels has three primary drill chuck receiving openings, one for alignment of the twist drill and cams on the twist drill chuck; a second receptacle for grinding the end of a chucked twist drill; and a third receptacle which receives the drill and chuck for grinding a split point on the sharpened twist drill.