SU982905A1 - Cutting measuring of saw frame - Google Patents

Description

(54) MECHANISM OF RESESH FOREST-FRAME

The invention relates to lumbering, in particular, to the arrangement of a cutting frame sawing mechanism.

In the existing fast sawmill frames, the reciprocating movement of the saw frame is performed by a crank drive mechanism, which causes a variable speed of its movement. At the same time cKOpocTjb hearth and continuous-constant. This leads to uneven feed per tooth during the working stroke, greater peak cutting and scraping forces, which degrades the quality of the frame grip and reduces its productivity.

The cutting mechanism of the sawing frame is known, which contains rods connected to the upper and lower bars, the ria of which are by means of holes and placed by & They are mounted in the saws and saw guides, 1L.

When the longitudinal axis of the material being cut is displaced relative to the center of the force, the forces arising during cutting act asymmetrically on the rods that are spring-loaded relative to the saw frame, on which the saws are mounted, causing them to turn, leading to increased friction and heating of the saws in the rails and sawing, changing the direction of sawing, wedging of rods and saws in rails.

The aim of the invention is to improve the quality of sawing.

The goal is achieved by saw holes

10 are oblong in shape, and the clips located in these holes are spring-loaded from the side of the cutting edge of the saw, and the rods are rigidly connected to the upper and lower crossbars.

15

FIG. 1 shows the cutting mechanism, a general view; in fig. 2 is a section A-A in FIG. 1; Fig, 3 - frame saw of the proposed design, a general view.

20

The design of the cutting mechanism includes saw blades 1 with the collars 2 installed in the long holes of the saw, having the possibility of movement in the feed direction and

25 consisting of a sleeve 3 and a ring 4, interconnected by screws 5.

The yoke 2 is spring-loaded from the side of the cutting edge by a spring 6 installed in the groove of the saw extending into the pro30 durable hole between the cracker

T, in contact with the yoke 2, and the supporting disk 8. Saw 1, the yoke 2 is mounted on the rods 9, fixedly connected to the cross member of the saw frame 10 with a screw 11 in the grippers 12, and having the possibility of free axial movement along them. Moreover, the hole in the holder 2 is made larger than the diameter of the rod by an amount equal to half the maximum elongation of the canvas during heating during operation. Saw blades 1 are interstitial lockup 13, installed above and below the material to be sawn.

The device works in a discreet manner. ;

When sawing wood with a saw 1, a cutting resistance force occurs that acts in horizontal and vertical planes, the tapia horizon is composed of force, cutting affects the saw 1 in the material feed direction and causes the saw 1 to move and squeeze the pruzkin b. and reducing the horizontal component of the cutting force below the compressive forces of the springs 6, the latter returning the saw to the original position. The moment of operation of the springs is determined by the degree of their compression and the magnitude of the horizontal component of the cutting force

The proposed construction of the cutting unit makes it possible to increase the reliability of saws by 1.5–2 times, to reduce the peak values of cutting forces by 20%, to ensure the stability of feed per tooth, to increase the reliability of elements of the cutting mechanism, to increase the accuracy of frame milling by 20–30, Use frame saws equipped with a hard alloy.

Claims (1)

1. USSR author's certificate 818859, class, В 27 В 3/10, -1978 Lprototype). AA FiI futS