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the Basic operations plotnichnyh works (a part 3)

Merging by the direct lock (fig. 11). That srashchivaemye parts worked on a stretching, cut down the direct lock. The ends srashchivaemyh details in this case should be identical section, and end faces are sawn precisely round. Cutting down the lock, height of an end face of one of srashchivaemyh bruskov divide into five equal parts and spend four lines. From an end face measure two pieces in length on 1 1 / 4 or 1 1 / 2 heights bruska and two risks for the first and the second propilov put on top bruska and on its lateral faces. Then from the second line at an end face on a lateral face spend a line to the first risks, and from the third line at an end face - to the second risks. /

On the first and second risks do has spent on drink to the third line, chop off an end face to the second line and choose the remained wood between prosaws of the third line. A surface of received first half of lock carefully smooth out. In the same way process the second brusok. Having imposed bruski locks one on another, podtesyvajut roughnesses and then definitively connect. /

Merging of bars

a Fig. 11. Merging of bars :

and, in - the direct lock with an oblique end face; g - the slanting tension lock; d - end-to-end on a support; e, z - vpoldereva; and - slanting prirubom; to, m - the direct unprofitable lock; l, n - the slanting unprofitable lock;
1 - wedges; 2 - skoba; 3 - nagel; 4 - a nest

Merging by the direct lock with a tension wedge . More dense adjunction of details to each other provides the tension wedge produced from firm breeds of a tree. An order of preparation of locks same, as well as in the previous case, however in the middle of each of them leave a place for wedges which hammer from two parties. /

Merging of logs by the slanting lock

a Fig. 12. Merging of logs by the slanting lock :

and - division of an end face into six equal parts and carrying out of lines 3-3, 4-4, 1-5 and 3-6-6-3; - carrying out of lines 4-5-4 and 6-2-6; in - oteska planes in the area of 4-5-4 and carrying out of other lines; g - half of lock

Merging of logs by the slanting lock (fig. 12). At first draw the slanting lock. For this purpose saw round the ends srashchivaemyh logs and find the centres of end faces, spend diameter, divide it precisely into six equal parts, marking with figures. Through the first and fifth divisions spend at an end face of a line 3-3 and 4-4, perpendicular to diameter. /

From an end face on the distance equal of 2,5 diameters, on a log circle draw a line parallel to an end face, and from the end of diameter 1 and lines 3-3 - the straight lines parallel to an axis of a log (one 1-5 and two 3-6). On a lateral surface of a log designate straight lines 4-5-4 and 6-2-6. The marked end otesyvajut, forming a plane in the area of 4-5-4, on otesannoj planes designate a line connecting the middle of a line 4-4 with point 5, halve it and spend a line 7-7, perpendicular the first. In the area of 6-5-6 do has spent on drink, perpendicular axes of a log to points 6, and has spent on drink 7-7, perpendicular planes 4-5-4, on depth to a line 6-2-6, i.e. to points 8. Having chopped off wood between points 7-5 7 to the marked depth, receive a plane 8 6-6-8 which is necessary for smoothing out. The second end of a log prepare in the same way. Having adjusted then connected parts, collect a cutting, fasten collars or bolts.

Slanting locks can be used and at merging of bars (fig. 13, 14). But it is considerable the big durability provides here a tension wedge.

Cuttings at horizontal interfaces of bars

a Fig. 13. Cuttings at horizontal interfaces of bars :

And - a cutting poluskovorodnem; - a cutting skovorodnem

receptions of merging of details by simple and difficult locks

Fig. 14. Various receptions of merging of details by simple and difficult locks

and - a direct overlay; - a slanting overlay; in - a slanting overlay with a face tooth; g - direct packing with face corners; d - direct unprofitable the lock with a tooth; e - direct unprofitable the lock skovorodnem; - the direct lock with a slanting end face; z - slanting unprofitable the lock with a tooth; and - the direct lock with a step end face; to - the Dutch lock working on compression, a stretching and a bend; l - a marking a template of the Dutch tooth.

The Marking of bars for interfaces can be carried out on templates.

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