RU2496633C1 - Method of producing curved and round billets from timber - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to construction and can be used in woodworking for production of furniture components and small wood house building. Site of forced bending of growing wood of knots is cleaned. Two-section curvilinear template is installed at said site. Press bending force is created with periodicity and of appropriate force to be applied to wood in growth period. Trunk is cross cut over the length to curvilinear and round billets.

EFFECT: stable curvilinear surface, reduced consumption of timber, lower production costs.

2 dwg

Description

The invention relates to the construction industry and can be used in the woodworking industry for the production of curved products from solid wood, for example, in the manufacture of carpentry and furniture products and small wooden housing construction.

Under natural conditions, the growth and formation of the tree trunk, from the butt to the top, is carried out along the vertical axis in the rectilinear-longitudinal direction. Coniferous wood with a rectilinear longitudinal axis of assortments (pine, larch, spruce and cedar) is mainly used for the production of elements of building products. The harvesting and processing of such wood makes it possible to obtain mainly straight-line elements from it, for example, for joinery and furniture or supporting structures.

Often, by bending in cramped conditions, curvilinear surface profiles are obtained from them, which have significant internal stresses and subsequently cause changes in the radii of their curvature, which is a drawback.

The proposed method provides:

- increase the dimensional stability of curved surfaces of structural elements;

- increase the operational durability of volumetric building structures;

- reduction of internal stresses in the workpieces and consumption of timber, the total cost of the production of curved profiles of the elements of carpentry-furniture and building structures.

This is achieved by obtaining curved round billets from wood by artificially forming a non-rectilinear wood trunk with different bending radii due to the use of curved patterns fixed to the tree for the period of its growth, we obtain a curvature of the axis of the trunk (Fig. 1).

The longitudinal curvature of the axis of the trunk can be obtained during the growth of a growing tree (12-14 years), during the period of its intensive sap flow due to the formation of a tree trunk under the influence of curved patterns (Fig. 2).

This curvilinear conductor template is installed on a tree trunk and fastened with a screw jack for the period of formation of the curvature profile along the longitudinal axis (Fig. 2).

The screw force of the jack (1) and the curvature of the profile of the jig template defines the bending radii (curvature) of the axis of the barrel.

This is done as follows: -

- the trunk of growing wood is cleared of knots in the area of its forced bending;

- a 2-section curvilinear template is installed on this section using clamps (2) and a bolted connection;

- using the massive nut (3) of the cable ties (4) and the steering wheel (5), a press force is created on the barrel to bend it. The frequency and intensity of the impact on the wood is determined experimentally during observations of the growth and curvature of the wood trunk to the required radius. When the wood reaches the necessary parameters for the diameter and magnitude of the bend of the trunk section, the trunk is freed from the template jig;

- the curved barrel is scored along the length into curved round billets.

Claims (1)

A method for producing curved round billets from wood, consisting of cleaning knots of forced bending of growing wood from the knots, installing a 2-section curved template in this section, creating a bending press force with periodicity and force on the wood during growth and lateral cutting of the trunk along the length on curved round billets.

Images