Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1981-05-29
1983-11-01
Smith, James G.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
51 99, 51240T, 82 4C, 82 86, 266 57, B24B 534, B24B 2704
Patent
active
044124015
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention refers to an apparatus for processing tubes, particularly heavy metal tubes, comprising a supporting device associated with a frame and arranged to support a tube and upon processing, e.g. cross cutting, welding or grinding the tube allowing rotation of the same relative to the supporting device and consequently relative to the processing tool in question, said supporting device comprising a plurality of supports which are mutually spaced apart in the longitudinal direction of the apparatus and each of which includes two rotary or roller elements.
THE PRIOR ART
An apparatus of the art described above is in all essentials previously known by Swiss patent specification No. 555 719. In this known apparatus, however, the processing tool--which in practice consists of a cross cut grinding wheel--is axially immovable relative to the supporting device. When a tube piece having a certain, often accurately settled length shall be cut off a longitudinal movement of the tube in question along the supporting device is therefore needed so as to locate the point at which the tube shall be cut just in front of the cutting wheel. More precisely this is done by means of a dog which is applied to one end of the tube and displaces this tube along the supporting device until the opposite end abuts and is stopped by a stop which has previously been positioned in a desired position relative to the cutting wheel. To displace the tube axially along the supporting device in this manner may perhaps be done as long as lightweight or medium tubes are involved. However, as soon as heavy tubes shall be handled, e.g. metal tubes having a weight in the region of 500 to 1,500 kg, the apparatus is no longer fit for use in practice because such tubes cannot be displaced at the same time as they rest on the supports due to the fact that the frictional resistance is too great.
DESCRIPTION OF THE INVENTION
The present invention aims at eliminating the above-mentioned limitations of the apparatus previously known and create opportunities for a simple and quick finding of the appropriate mutual position between the processing tool and the tube without absolute necessity of lifting the tube, independently of the weight thereof. According to the invention this is achieved by the fact that the processing tool is connected to a support which is movable relative to the other substantially stationary supports included in the supporting device in order to allow the movable support and thereby the tool itself to be moved to various positions of adjustment along the longitudinal axis of the tube or the supporting device at the same time as a tube lies resting on said stationary supports.
SHORT DESCRIPTION OF THE DRAWINGS
With reference to the attached drawings a more detailed description of an embodiment of the apparatus according to the invention put forward as an example will follow hereinafter.
In the drawings;
FIG. 1 is a perspective view showing the apparatus of the invention in its entirety;
FIG. 2 is a sectional view of the same apparatus;
FIG. 3 is a perspective view illustrating a bearer for the driving device and the processing tool of the apparatus; said two components being shown in dashed lines for the sake of clarity;
FIGS. 4 and 5 are detailed cross sections illustrating an eccentric locking device for a support of the apparatus, the eccentric locking device being shown in a releasing position in FIG. 4 and in a locking position in FIG. 5;
FIG. 6 is a detailed view of the driving device of the apparatus seen from above;
FIG. 7 is an end view of the same driving device;
FIGS. 8 and 9 detailed sectional views illustrating a processing tool in the form of a cross cutting grinding saw belonging to the apparatus, and
FIGS. 10 and 11 end views illustrating a lifting device in two different positions, said device being designed as an extra fitting.
A PREFERRED EMBODIMENT OF THE INVENTION
The apparatus shown in the drawings comprises a frame which in its entirety is designated 1 and which in this case is
REFERENCES:
patent: 2680607 (1954-06-01), Hollinger
patent: 2811874 (1957-11-01), Rethoret
patent: 3292468 (1966-12-01), Orthey
patent: 3562959 (1971-02-01), Dooley
patent: 3572199 (1971-03-01), Harden
patent: 3656734 (1972-04-01), Davis
patent: 4052039 (1977-10-01), Koyano et al.
patent: 4349182 (1982-09-01), Blackburn
Brown Charles A.
Olszewski Robert P.
Skutskars Rostfria AB
Smith James G.
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