DE382764C - Method for producing several pipes from a log - Google Patents

Description

With the constant development of technology, they were already in the earliest times in Application brought wooden pipes by cast iron, wrought iron and metal pipes -rushes, but the latter show disadvantages in terms of their versatility jeopardize economic exploitation by consuming too quickly.

The chemical industry, the salt works, salt works and potash works, which acids and Having to transport soles, use instead of the wrought iron and which tend to rust cast iron pipes far more advantageous wooden pipes. Even with large flushing systems Large and heavy cast iron pipe strings previously used in opencast and civil engineering operations have an inhibiting effect on operations when they are laid due to their weight and unwieldiness. The use of wooden pipes would keep work interruptions to a minimum restrict and thereby be very beneficial. Last but not least, one must disregard that the high acquisition costs resulting from the rise in the price of coal and iron iron pipes can be reduced many times over by the use of wooden pipes, as with the latter the material itself and the manufacturing costs are considerably lower.

Up until now, wooden pipes have been made in such a way that one either has a longer tree trunk hollowed out, as happened on the salt pans of the older type, or a similar bet was made as in the case of the barrels, the pipe is made up of several staves. Also come in the Modern times made of wood veneer in several layers with the fibers offset against each other coiled and glued tubes in receptacle.

On closer examination, however, none of the procedures can fully meet the requirements will. The former method, while simple, does not give clean pipes and costs a lot of wood. The second type of manufacture is large-scale in America accepted for all purposes. But since the pipes, as with the latter type, do not come off Are made of one piece of wood, they have so many disadvantages compared to others Pipes afflicted that the advantage of the wooden pipe is largely suppressed. Finally if one has resorted to the means of uniting wood and metal together into pipes, by providing metal pipes with an inner lining made of wood. Such pipes are probably very tough and useful for the aforementioned purpose, however, the manufacturing process is rather intricate, and the pipes are priced very high above all.

The method according to the invention has the advantage of being cheap over all others Manufacture, insofar as several tubes of different diameters are made from one trunk without significant waste •will.

The subject of the invention is in the version for rod milling cutters in the drawing shown, namely show:

Fig. Ι the machine with clamped beam in side view,

Fig. 2 the machine in plan view and

Fig. 3 the machine in cross section along the line AB in Fig. 1.

882764

The new method consists in cutting out several wooden pipes of various widths in the desired wall thickness from a tree trunk using a bar cutter or bar saw. For this purpose, a straight piece of wood of about ι m length is fastened exactly in its central axis, and any number of rings are drawn at its head end, which mark the number of pipes to be cut and determine their wall thickness. In this way, a pipe cross-section always alternates with a free field. The free field is that part of the piece of wood that is milled or sawed out. In these free fields in the radius of the tree trunk as many drill holes are driven through the whole piece of wood as there are such free fields. A rod cutter or rod saw is then passed through these drill holes and brought to the appropriate cutting speed. Because the tree trunk is turned in the opposite direction to the direction of rotation of the cutter, the cutter works its way through the wood in a circular cylinder and cuts out the desired pipes. The machine described below, which forms the new subject matter of the invention, is based on this arrangement. The machine consists of the base plate 1 with the frame 2 screwed onto it. On the latter, the boom 3 is attached to one side, which serves to feed the auger bit 18 with the aid of the spindle 15 and the handwheel 17 with bevel gear ratio and nut to lead through the two rods 16 at the rear. On the other hand, the bed 4 is attached to the frame 2 by sliding rails which can be moved up and down by means of sliding rails. of the two tailstocks 19 and the claws 20 | carries the log 21. The left tailstock '19 is fixed, the right one is movable and can! through the spindle 22 with the help of a nut! and the handwheel 23 are moved. \ In support of the bed is on the! Base plate still screwed on the bearing 24, in which there are slots 25 l) e on both sides, into which the bolts attached to the bed engage for guiding and fixing this. The up and down movement of the bed is done by hand, through the hand wheel 26 and the spindle 6, which carries two worms engaging in the worm wheels 7 and 8, each of which sets a screw spindle 9 in motion.

I The drive of the auger happens [(lurch belt transmission to the staged; 'disc 10. The drive of the Vorschuhes overall: layer by the stepped disc 10 from toothed gears 11, 12 via two countershafts to the bevel gears 14 is further passed through a ¹ second! to serve pair of bevel gears on the pivoted left claw 20 Vm the feed by hand, can be the bevel gears 14 j disengagement by a clutch I; it happens, the drive with I help of the hand wheel 5, a worm and a worm wheel by! the second pair of bevel gears on the claw 20.

The machine works in the following way: The piece of wood 21 is clamped by the claws 20 by means of the tailstocks 19 by turning the screw spindle 22. The holes described in the method and marked in section AB are then drilled with the auger bit 18. After this has been done, the auger bit is replaced by a rod milling cutter, which is pushed through the drilled hole over the entire length and inserted in the bearing 24 so that it can rotate. In this way, the milling cutter is given a firm hold. Now the milling cutter is set to a speed of 1500 T./Min. brought and the piece of wood is rotated clockwise about an axis by a special driver. The cutter now works its way through the wood along the entire length of the piece of wood in a cylindrical surface until the outer tube is separated from the inner part. This is then removed, the milling cutter is withdrawn and the remaining wooden body is brought to the height of the milling cutter with the next milling hole, so that the process can begin again.

Claims (1)

Patent claim: Process for the production of wooden pipes from a log, characterized in that, that the tubes are milled or sawn out of it by the cross-sectional area of the to be processed Piece of wood divided into fields, according to this division the trunk with a drill is drilled lengthwise, and that then these drill holes, the strength of the milling field and the drilling walls determine exactly, for holding the cutting tool (bar milling cutter, bar saw) to serve. 1 sheet of drawings.