SU1069993A1 - Flexible cutting member - Google Patents

Abstract

iv FLEXIBLE CUTTING ORGAN The surface of which is provided with inclined working elements, characterized in that, in order to reduce effort and increase cutting performance., the working elements are made in the form of platforms, the working surface is directed in the direction opposite to the feed direction of the working element, and the platforms are symmetrically relative to the plane passing through the longitudinal axis of the flexible cutting member in the direction of its supply. 2. The body under item 1, about aphids h ay-y and also with the fact that its surface on the supply side is provided with undercutting elements mti. а :) со со со: о

Description

The invention relates to cutting bodies used in the forest industry. A cutting body is known, including a cable, the outer threads of which are made with a continuous cutting edge located along its entire length. 1. The disadvantages of this cutting body are the manufacturing complexity, moving away from the feed direction and a significant effort to stretch the cable. Also known is a flexible cutting body, the surface of which is provided with inclined working elements G21. The disadvantages of the known are: constructions due to high cutting forces and low cutting performance due to the presence of an asymmetrical SCREW cutting edge and a large diameter of the cutting member. The purpose of the invention is to reduce the effort and increase the cutting performance. The goal is achieved by the fact that in a flexible cutting organ the working elements are made in the form of platforms, the working surface of which is directed in the direction opposite to the direction of supply of the working organ, and the platforms are located symmetrically 1.11 Regarding the plane passing through the axial axis of the flexible Cutting body in the direction of its filing. . In addition, the surface of the flexible cutting body is equipped with undercutting elements. . FIG. 1 shows a device with a flexible cutting body, common. .wid in FIG. 2 - flexible cutting body / in FIG. 3 shows section A-A in FIG. 2; in fig. 4 - flexible cutting member 1 variant; Fig. 5 is a diagram of the cutting process by a flexible cutting member; in fig. b a section bb in fig. 5. The device with a flexible cutting tool (Fig. 1) consists of the frame 1, on which the engine 2 is mounted. With gear 3 on the drive pulley 4, on the water rollers 5 ,; stabilizer 6 of the flexible cutting body 7., for example, in the form of wire, g. The flexible cutting body (Fig. 2) is provided on its side surface with recesses 8 containing working straps 9 directed towards the opposite direction of the working body feed, and located symmetrically with respect to the plane passing through the axis in the direction of supplying the flexible cutting organ. At the working sites 9, there are forces, 1 which are self-engaging flexible cutting, the organ into the wood. The surface of the flexible cutting member 7 between the notches 8 on the supply side is provided with undercutting elements 10 protruding above the surface of the flexible cutting member by an excess of L. The pitch between the undercutting elements 10 t and the excess A should be predominantly in proportion. The frequency of the notches 8 and, therefore, the working sites 9, characterized by the step t, should also have a pattern. The execution of the working platforms with the specified parameters allows to spend on the cutting process minimum energy with significant cutting performance. In another embodiment of the flexible cutting body, the notches 8 with working platforms located on both sides are interconnected in the cutting plane, while the working platform on the supply side forms the cutting edge 11. For mechanical, destruction of wood instead of regularly arranged cutting elements 10 on the turn1 Small undercutting elements 12 are applied to the spines of the flexible cutting body on the supply side by spraying metal. Working platform 9 can be formed not only by a notch but also by a protrusion, for example, using and sprayed metal. Flexible cutting body works as follows. The engine 2 is turned on (Fig. 1, which, by means of gear 3 and driving pulley 4, drives the flexible cutting member 7 at speed Vpea- Next, the cutting device with the flexible cutting member 7. (Fig. 5 and 6) is pushed onto wood 13 with cKopiogjiifW Filing Up The stabilizers b orient the flexible cutting body so that the trimming elements 10 (12) are directed towards the feeding side. The cutting elements meeting with the wood begin to destroy its fibers, and the flexible cutting organ is introduced into the wood 13. Since the wood has fiber t elasticity, on work sites 9, a force P arises, as a component. From the force P, directed normally to the working platform 9, i.e. the components of the cut-off ytt form a common force. O to the force Pjcrr increases to Ppg, i.e., to the maximum. The force causes the flexible cutting member to be inserted into the wood throughout the entire area in contact with the wood. In this case, the efforts to stretch in a flexible cutting organ, arising from the feed force, will be minimal. Since flexible cutting bodies allow high speeds due to the absence of dynamic loads when engaged with the drive pulley, the cutting performance will be high. For example, when the speed of movement of the flexible cutting member exceeds 3 mm and i, 30 mm, the feed rate is “..- ". A tree trunk with a diameter of 1 m will be cut in 0.2 s. At high cutting speeds Vpe, the flexible cutting body from friction against wood does not have time to heat up, since moisture, kept in wood, plays the role of medium cooling. In addition, the flexible cutting body outside the cutting zone is cooled during its rapid movement with outside air. When cutting frozen wood, the heat generated by a flexible cutting body against wood thaws it, creating favorable conditions for self-implanting of the body into the wood. The flexible cutting member is small in size, so little mechanical energy is expended on cutting. Waste wood in the form of sawdust and shavings are also insignificant. For example, the wire diameter may be 0.5-4.0 mm depending on the diameter of the whip and the strength of the steel. The resulting {FIG. b) after the passage of the flexible cutting body of the wood trunk, the gap 14 is very small. When cutting soft woods across the fibers, the gap can be zero. The mass of the flexible cutting body as compared to the mass of the saw chain used on logging machines is 10-15 times less, and the reduction of the mass of the cutting body and mechanical energy during the cutting process leads to a sharp decrease in the mass of the shearing mechanism and, thus, the mass of the machine as a whole. . The application of the proposed flexible cutting body makes it possible to increase the productivity of tree cutting by a machine by 2-3 times and replace expensive saw chains. .

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Claims (2)

iv FLEXIBLE CUTTING BODY, The surface of which is equipped with inclined working elements, characterized in that, in order to reduce efforts and increase cutting productivity., the working elements are made in the form of platforms, the working surface of which is directed in the direction opposite to the direction of supply of the working body, and the platforms located symmetrically relative to the plane passing through the longitudinal axis of the flexible cutting body in the direction of its supply. 2. Authority for π. 1, on the basis of the fact that its surface on the supply side is provided with cutting elements. (E