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WO/1999/033416A1 |
The invention relates to a method for cutting workpieces with a non-round or inconstant contour on usual commercial programmable turning machines. According to the invention, the application and combination of programmed threading cycles...
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WO/1999/029457A1 |
A drilling edge (6) is provided at the front end of a land (5) defined by a groove (3). Behind the drilling edge is provided a tapered thread cutting edge (7) which, on its upstream side in the direction of rotation, protrudes beyond the...
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WO/1999/024201A1 |
A method for machining a through bore (5) within a workpiece (W) and a device (10) for the implementation of the method. The method is suitable for finishing and semi-finishing machining operations of through bores and holes, in particul...
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WO/1999/022891A1 |
A fastener forming apparatus (10) comprises a positive stop (40) that prevents workpieces (16) from overshooting the end of a forming stroke. A workpiece transfer mechanism (20) transfers one unformed workpiece (16) at a time into a work...
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WO/1999/011416A1 |
The invention relates to a screwing plate comprising at least one cutting tip (4) whose contour matches the desired shape of the threading. The cutting tip is configured as a chip forming element (10) which is shaped in the form of a spu...
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WO/1999/008005A2 |
A threaded fastener (10) is having a raised area or bump (16) on a thread flank. The flank can be positioned on the nut thread (12) or on the bolt thread (14). The bump (16) forces the mating threads at least on one flank to have near ze...
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WO/1999/003631A1 |
In a cold forming tap of the embodiment, those projections, which constitute a part of the projections and are axially adjacent to one another, are removed to valley bottoms, and cutting blades, a diametrical dimension of which correspon...
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WO/1998/051431A1 |
A fast-acting die head (10) that is particularly well-suited for use with small-size workpieces employs a set of chasers (24), each formed as a single piece (24) and having a nose portion (36) that provides two force-receiving surface el...
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WO/1998/046388A1 |
A tool producing internal thread, such as a screw tap or a thread former, incorporates a minimal lubricant tank (7, 7') which is located in the tool. The cooling lubricant is conveyed to the chipping point via fine feed bores (9) only wi...
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WO/1998/043770A1 |
A method for removing burr of a thread, particularly the top burrs existing at the incomplete top portion of a thread profile, is to have the cutting edge half angle ($g(a)�1?, $g(a)�2?) built a little bit bigger than the half angle ...
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WO/1998/043769A1 |
A method for removing burr at screw thread ends, especially burr at the incomplete flank portion of a thread profile, by using a cutter having a straight main edge with a round tip where the radius of said round tip is smaller than or eq...
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WO/1998/042470A1 |
A machining assembly and a method of cutting a tubular member (19) are described which includes a cutting tool (8) and a tubular member holder (4, 5), wherein the linear and rotational displacement of the cutting tool (8) and the tubular...
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WO/1998/041358A1 |
The inner/outer surfaces of a hollow member whose inner/outer surfaces have non-circular curves are machined with high precision at high speeds. The cycle-machining device has a C-axis driving means (54) by which the hollow member is sup...
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WO/1998/025724A1 |
A control device stores an automatic operation program of a threading cycle prescribing a basic helical movement of a tool corresponding to the thread by specifying the number RC of revolutions of a main shaft, a screw lead ZR, a point Z...
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WO/1998/018589A1 |
This invention concerns a toolholder (1) for a tool drive with an outer (2) and an inner concentric (4) drive shaft. It has a first adapter (10) which is detachably held by means of a conventional clamping system (15) in a receptacle (3)...
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WO/1998/017441A1 |
The present invention provides a tool primarily intended for use in pipe or conduit systems for removing fittings and repairing threads. The tool comprises a body (20), an elongated rigid stem (34), and a handle (36) fixedly connected to...
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WO/1998/010882A1 |
A combined hole making, threading and chamfering tool (200, 300) with staggered thread cutting teeth (306, 308) doubles chip thickness and reduces side forces (less engagement) consequently allowing the feed rate to be increased and redu...
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WO/1998/003689A1 |
An improved hard wearing surface zone is being formed in a tungsten carbide-cobalt cemented carbide. This has been achieved by a post-sintering heat treatment in a boron nitride containing environment of a hard metal of a suitable compos...
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WO/1997/045224A1 |
A thread cutting tool is provided to simultaneously cut opposed concentric screw threads on a connector member. The tool comprises a cylindrical body with radially spaced first and second thread cutting sections and is adapted to cut thr...
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WO/1997/037781A1 |
The invention concerns a method and equipment for cleaning bolts of different types and diameters, or external threads on such bolts. At least one brush (3; 8) in the cleaning equipment is flexibly mounted so that it can be moved radiall...
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WO/1997/034726A1 |
A nib tap (10) configuration in which the thread turns (16) are of progressively increasing pitch diameter over a range of size limits associated with a standard basic pitch diameter. A particular size limit can be provided by grinding o...
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WO/1997/034725A1 |
A thread repair tool (10) and method of manufacturing are disclosed, along with a method for repairing damaged threads of a bolt, stud, or the like. The thread repair tool (10) includes a pair of chaser sections (14, 16) each having a th...
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WO/1997/032682A1 |
The invention concerns a rigid tapping tool which produces an internal thread and is either a screw tap or a thread former. The threaded head of the tool has a conventional chamfer (a) but not a conventional guide part. The disadvantages...
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WO/1997/026106A1 |
A screw tap for forming a female screw in a workpiece, and a female screw forming method. A screw tap (1) formed so that a bottom portion (4) between crests (3, 3) contacts crest portions (22a) of a female screw (22), which is formed in ...
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WO/1997/016277A1 |
The present invention relates to a method and a cutting insert for threading. The method aims to produce a thread in a rotary work piece. The threading insert has a polygonal basic shape including at least one cutting corner. The cutting...
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WO/1997/002110A1 |
Threading attachment for internal or external threading comprising a spindle head (1), which is intended to be attached to a spindle on a machine tool and also a tap holder (5) with a holder body (6) in which a tap (13) is arranged durin...
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WO/1996/030148A1 |
Disclosed is a cutting tool, in particular a drill, milling cutter, thread-cutter, reamer or core drill, with a shaft and a cutting part provided with at least one cutting edge for machining a work piece while removing cuttings. The cutt...
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WO/1996/022172A1 |
The present invention relates to a method and a cutting insert for threading. The method aims to produce a thread in a rotary work piece, wherein a threading insert, including at least one cutting tip, creates the shape of the thread. Th...
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WO/1996/009133A1 |
A system for adapting existing conventional screw machines to be capable of computer numeric control (CNC). The system incorporates the use of a VersaCam device (12) which replaces the turret cam of a single spindle screw machine (10). T...
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WO/1996/007502A1 |
A unitary bore forming and threading tool for producing a variety threaded bores having chamfers and counterbores without a need for tool changes. The improved tool preferably includes a shaft of predetermined axial length and having pro...
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WO/1995/031667A1 |
A new fluid coupling assembly (50) includes a split male nut (60, 62) positioned over a coupling member or gland (14) of a fluid system. The split male nut members (60, 62) are preferably formed of a precipitation hardenable material. Va...
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WO/1995/028237A1 |
A cleaning device (70) has adjustable brush bars (10a, 10b) that are mounted in a cylindrical inner tube (20) and that may be adjusted inwards or outwards in the radial direction by means of an outer tubular piece (4). A driving unit (20...
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WO/1995/018693A1 |
Method and apparatus are disclosed for forming dual synchronized threads (24, 26) on the interior and exterior cylindrical portions of a tube or pipe (22), and in the inner and outer cylindrical surfaces of an annular channel formed in a...
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WO/1995/018586A1 |
A special process is disclosed for producing threads by metal cutting when a more or less gradual change of the thread profile is desired in at least one of its sections. When producing a thread by turning, by milling or by turning and m...
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WO/1995/016534A1 |
To optimize tool geometry and potential applications with minimum outlay for production and to realize a new mode of operation with a milling and boring tool that is designed to produce recesses such as fits, blind holes or tapped holes ...
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WO/1995/009061A1 |
A process and apparatus for forming threads of varying pitch on a work piece, by first producing a partial thread (72, 73, 74, 75, 76, 77 in Fig. 3) and groove whose pitch does not vary in accordance with a pattern of pitch variation des...
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WO/1995/007159A1 |
The present invention relates to a thread cutting insert comprising an upper chip face (11), a lower face (12) opposite and generally parallel to said upper face and at least three side walls (13, 14, 15) located therebetween wherein the...
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WO/1995/007151A1 |
A rotary brush cleaning arrangement to be connected to a portable driving arrangement should allow fittings stud bolts in a large diameter range to be cleaned without requiring the brush-bearing bars (10) provided in the arrangement to b...
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WO/1994/029075A1 |
A pin (10) is provided for repairing cracks (C) in a material (M) such as iron casting materials. The pin includes threads (60) with both upper and lower surfaces wich angle toward a head of the pin. A tapping bit (550) is utilized in a ...
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WO/1994/025763A1 |
A thread-forming screw that can be screwed directly into concrete, stone or the like has a screw head (11), a screw shank (12) and a thread (14) which extends at least partly over the length of the screw shank. The invention provides tha...
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WO/1994/021409A2 |
A threaded hole may be formed in a lid of an underground petrol tank without emptying the tank or removing the lid, using a tool (Figure 3) having a taper tap section (61), an intermediate tap section (62) and a final tap section (63). A...
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WO/1994/017946A1 |
The present invention relates to a thread tapping cutting tool, which has a working part (1) provided with an introductory chamfer part (1b) and control part (1s) both arranged at one end of a shank (Z) while the other end of the said sh...
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WO/1994/015744A1 |
The invention relates to a manually-operated threading device which comprises a threading die stock (3), and self-locking and holding mechanism (4) used for clamping a pipe to be threaded, a screw and nut mechanism (16) which constitutes...
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WO/1994/015105A1 |
A self-drilling and self-tapping screw (10), the self-drilling portion (38) of which is formed in two major operations. A cutting tip (20, 22, 26) is formed on the tip (16) of screw blank (44) by a pair of rotating circular saw blades (4...
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WO/1994/014561A1 |
A rotary tool connecting assembly (1) comprises an adapter receiver (15) for receiving and securing a tap (4), a chuck body (2) having one end which is detachably connectable to the spindle (3), and an opposing end having an axially alig...
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WO/1993/024257A1 |
Procedure for making a screw thread on a corrugated bar, in which procedure the thread is made on one end of the corrugated bar (7), in which procedure the end of the corrugated bar (7) is expanded by battering so that the cross-sectiona...
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WO/1993/016832A1 |
According to the invention, the workpiece (1) is fixed onto a headstock spindle rotated by driving means about a spindle axis (I-I). A turning tool (3) is mounted onto a tool-carriage which is movable in translation according to a transv...
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WO/1993/013890A1 |
A machine and method for continuous thread tapping of threads in fasteners such as nut blanks or the like having a fastener blank advancement mechanism incorporated into a fastener blank holding and guidance assembly. A continuous stream...
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WO/1993/013900A1 |
An in-die tapping tool (1) having particular application to a progressive die method for threading holes (108) in a sheet metal workpiece (106). The tapping tool (1) includes a transmission system comprising a threaded shaft assembly (26...
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WO/1993/004817A1 |
A numerical control device capable of working with high accuracy by accurately instructing a tool feeding speed even when there are abrupt fluctuation in the actual speed of a spindle. When the number of revolutions of the spindle (4) is...
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