Metal tools and implements – making – Saw-making or furbishing device or machine – Sharpening and gumming
Patent
1997-09-29
1999-08-24
Payer, Hwei-Siu
Metal tools and implements, making
Saw-making or furbishing device or machine
Sharpening and gumming
76 43, B23D 6312, B24B 5312
Patent
active
059411384
DESCRIPTION:
BRIEF SUMMARY
In such apparatuses the grinding slide on the one hand and the feed slide on the other hand are controlled by a CNC control or a cam control system in such a manner that the grinding wheel plunges along a tooth face each into a tooth gap of the toothing of a saw blade while the feed slide remains stationary. As soon as the grinding wheel has reached the bottom of the tooth, a feed motion of the saw blade commences which is initiated by a driver in the form of a finger or a latch, which is supported at the feed slide, acting on a neighbouring tooth face. During the feed motion the grinding wheel generally plunges still deeper into the bottom of the tooth, and is then gradually retracted in order to sharpen the adjacent tooth back and finally its uppermost part which belongs to the tooth tip, the so-called flank. For this type of continuous path-controlled sharpening of saw toothings a grinding wheel is required which at its periphery comprises a profile which is adapted in a certain manner to the toothing profile.
Due to wear, the grinding wheel periphery gradually assumes a deviating profile; it is therefore necessary to dress the grinding wheel from time to time. For this purpose, the use of dressing diamonds is known which act on the grinding wheel in a spot-type manner and which can be moved under continuous path control in an own coordinate system, which is independent of the grinding device. Diamond dressing rolls are also known with a profile which complements the intended peripheral profile of the grinding wheel and which are also supported in an own device to be adjustable in at least two coordinates so that they can be brought into engagement with the grinding wheel which is only rotating while the grinding slide is stationary.
The invention is based on the object to simplify the dressing of grinding wheels in an apparatus for the continuous path-controlled sharpening of saw toothings and to shorten the required time for each dressing operation.
The dressing template according to the invention which preferably consists, at least partially, of polycrystalline diamond requires little space and can therefore be located at the apparatus for the continuous path-controlled sharpening of saw toothings in the immediate vicinity of the saw blade in a space-saving manner in an inoperative position where the template does not interfere with the sharpening of saw toothings. In the sharpening intervals the template has therefore to cover only a small travel from its inoperative position into a preferably stationary, i.e. not variable, operative position in order to provide the conditions for the grinding wheel to now plunge into the template instead of into the saw toothing, by means of which it will be dressed in a single working stroke of the grinding slide. The dressing operation by means of the template differs from the normal operation during sharpening of saw toothings merely in that the feed slide is put out of action, i.e. either stopped entirely or rendered inactive in another manner, during the dressing intervals and that the stroke of the grinding slide is shifted or shortened.
An embodiment of the invention will be described in the following with reference to schematic drawings with further details. In the drawings:
FIG. 1 shows the front view of an apparatus according to the invention; and
FIG. 2 shows the side view in the direction of the arrow II in FIG. 1.
In the drawings, a band saw blade is illustrated as an example of a saw blade 10 the toothing of which is to be sharpened; in the present context, however, the term saw blade covers a mill saw blade or a circular saw blade as well. In each case, a saw blade 10 with teeth 12 is involved, which are machined in a continuous path-controlled sharpening operation at their tooth faces 14 and additionally at their tooth bottoms 16 and tooth backs 18.
The apparatus for the sharpening of the saw blade 10 has a machine frame 20 with a saw blade guide 22 which in the illustrated example is formed by a horizontal rail and adjustable in height correspondin
REFERENCES:
patent: 4023446 (1977-05-01), Annas et al.
patent: 4082014 (1978-04-01), Idel
patent: 4693145 (1987-09-01), Gustavsson
Beck Ernst
Hensinger Bruno
Lenard Peter
Browning Clifford W.
Payer Hwei-Siu
Vollmer Werke Maschinfabrik GmbH
LandOfFree
Apparatus for the continuous path-controlled sharpening of saw t does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for the continuous path-controlled sharpening of saw t, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for the continuous path-controlled sharpening of saw t will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-457059