Metal tools and implements – making – Blank or process – Saws
Patent
1996-12-16
1998-10-27
Payer, Hwei-Siu
Metal tools and implements, making
Blank or process
Saws
76 27, 76 37, B23D 6312
Patent
active
058264655
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
This invention is concerned with the manufacture of saws of the kind in which the individual teeth of the saw are provided with hard material tips.
In particular, the present invention is concerned with the manufacture of band saws, and more particular to the manufacture of wide band saws which latter can conveniently be regarded as having a body depth from, for example, 100 millimeters to depths of the order of 350 millimeters or possibly more.
In general, the hard material tips, which have been conventionally formed from a number of materials i.e., tunsten carbide, are attached to the individual teeth of the band saws and have, in practice, to be very carefully positioned and firmly secured/mounted to the teeth, and also need to be accurately machined to provide the desired angular relationships between the working edges/faces of the tips which edges/faces have been found to be essential for the required standards of operational performance from the thus tipped band saws.
Conventionally, after such attachment to the teeth and any post attachment treatments such as heat treating, swaging deemed necessary, each such tip must be machined to provide predetermined angular relationships between the front face, the top face and the two side faces of the tip. In particular, the top and front faces have to be carefully angled with respect to the cutting direction/rotation of the saw when in use so that the required so-called front face rake angle and tip height is attained, and at the same time the requisite shapes for the gullet regions between adjacent teeth of the saw are preserved. In addition, it is conventionally necessary for the two side faces to be machined i.e., ground to the form required.
It is known to carry out such machining of the tips by mounting the saw whose tips are to be machined to machine(s) so that the body of the band saw is vertical with the teeth whose tips are to be machined uppermost. Such machines are conventionally provided with means for correctly positioning a saw tooth whose tip is next to be ground with respect to a grinding wheel or grinding wheels so that the wheel or wheels can be caused to effect a required machining operation, and with means for indexing i.e., advancing, the saw so that the next tip to be ground can be moved to the position at which it can be machined as required.
In the case of the machining of band saws of large physical dimensions such as is involved when machining long wide band saws which can be of lengths measured in meters and have a saw body depths as previously mentioned i.e., for example, 200 millimeters there arises considerable difficulties and problems in relation to the physical handling of the saw.
Furthermore, it is necessary to bear in mind that with these known machines for machining band saw tooth tips it is necessary to ensure that the plane of the saw body to be machined is positioned accurately vertical during the machining operations.
With this particular alignment of the band saw body, in order to mount the band saw to the machining apparatus the saw has to be man-handled so that it straddles the grinding machine whereby the machine is effectively located within the boundary of the band saw in order that the teeth of the saw can be successively presented to the actual grinding location/station of the machine at which locations grinding wheel(s) are operationally provided.
In view of the overall length of the band saw special saw support arrangements have to be provided to ensure that the edge of the saw remote from the edge with the teeth required to be machined is maintained in the correct horizontal plane for the purposes of machining of the tipped teeth. With this arrangement the part circular lengths of the band saw at the end portions/regions of the band formation, that are located up-stream and downstream of the grinding wheels being used to machine the saw, have to be mounted upon suitable supports which not only enable correct and acceptable supporting of the saw but also enable the saw to be prog
REFERENCES:
patent: 971841 (1910-10-01), Hibbert et al.
patent: 3315548 (1967-04-01), Anderston et al.
patent: 3460407 (1969-08-01), Vollmer
patent: 3611839 (1971-10-01), Idel et al.
patent: 3919900 (1975-11-01), Allen et al.
patent: 4557171 (1985-12-01), Stolzer
patent: 4587869 (1986-05-01), Hamer
Iseli & Co. AG
Payer Hwei-Siu
LandOfFree
Band saw blade manufacturing method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Band saw blade manufacturing method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Band saw blade manufacturing method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1605922