Press "Enter" to skip to content

Bending solid wood to form - download pdf or read online

By Edward C. Peck, U.S. Forest Service

Wooden bending is an historic craft that's of key value in lots of industries this present day, particularly in those who manufacture furnishings, boats and ships, agricultural implements, instrument handles, and wearing items. Of different equipment everyday to supply curved elements of wooden, bending is the main low-priced of fabric, the best of participants of excessive power, and maybe the most cost effective. lengthy event has developed useful bending options and expert craftsmen to use them. but advertisement operations usually maintain severe losses as a result of breakage throughout the bending operation or the solving approach that follows. there's a longfelt want for extra trustworthy wisdom approximately: (1) standards for choice of bending inventory; (2) greater tools of seasoning and plasticizing wooden for bending; (3) extra effective machines for the bending operation; (4) thoughts for drying and solving the bent half to the specified form; and (5) the impact of bending at the power houses of wooden.

Show description

Read or Download Bending solid wood to form PDF

Similar industrial technology books

Download e-book for kindle: Stochastic Petri nets: modelling, stability, simulation by Peter J. Haas

This ebook is set stochastic Petri nets (SPNs), that have confirmed to be a well-liked device for modelling and function research of advanced discrete-event stochastic platforms. the focal point is on equipment for modelling a method as an SPN with basic firing occasions and for learning the long-run habit of the ensuing SPN version utilizing machine simulation.

Developments in Surface Contamination and Cleaning by Rajiv Kohli, Kashmiri L. Mittal PDF

Floor illness is of cardinal significance in a bunch of applied sciences and industries, starting from microelectronics to optics to automobile to biomedical. hence, the necessity to comprehend the factors of floor illness and their elimination is particularly patent. mostly talking, there are extensive different types of floor contaminants: film-type and particulates.

Smart Antenna Engineering (Artech House Mobile - download pdf or read online

The expanding call for for instant providers and the growing to be variety of instant clients are pushing networks to their potential limits. shrewdpermanent antenna expertise can triumph over those ability limits in addition to increase sign caliber and enable cellular phones function on much less strength. This booklet fingers instant telecom engineers with a robust layout technique that permits them to choose the shrewdpermanent antenna technique best suited for a specific program.

Download e-book for iPad: Injection molds : 130 proven designs by Unger, Peter; Gastrow, Hans; Lindner, Edmund

Newly up to date and now in its 3rd version ''Injection Molds one hundred thirty confirmed Designs'' is a must-have for everybody concerned with designing and development injection molds. the hot variation has been revised and increased. outmoded designs were eradicated to make manner for brand spanking new technically built designs and the general quantity has now been elevated from 108 designs to one hundred thirty designs.

Additional info for Bending solid wood to form

Sample text

With shrinkage, the curvature is increased. With swelling, the curvature is reduced as the piece tends to straighten. Red oak specimens, 1 inch thick, steamed at a moisture content of 25 percent and bent to a radius of 25/8 inches were dried to a moisture content of 8 percent. After the distance between the legs was measured, the bent specimens were brought to a moisture content of 21 percent. At this moisture content, the legs were more than twice as far apart as at 8 percent. When redried to 8 percent, the legs were still 60 percent farther apart than originally.

The mean measurements for 11 sticks are shown in figure 18. The zones of maximum compression fall to the right and left of the center of the arc, but from 1 to 2 inches away from the center point. The pieces were clamped to the form at the center before bending commenced. The clamp may have increased the friction between the stick, the form, and the strap in the central portion. The increased friction may have prevented the central portion from assuming the full amount of compressive strain. The compressive strain was not restricted to the curved portion of the stick but extended for about 1½ inches along each straight leg.

The following tabulation gives endwise-compressibility values determined by this method: The values in this tabulation indicate that the wood of the species with values equal to or higher than those for Wisconsingrown white oak should be suitable for making sharp bends, sweetgum and black willow for moderate bends, and eucalyptus and coigue for slight bends. The low value for Sitka spruce indicates that it is unsuited for bending. The mean endwise-compressibility value can be used in the following formula to estimate the minimum bending radius at which successful bends can be expected in 50 percent of the pieces for stock of a given thickness: (11) where r is the radius of the form, h is the thickness of the piece, ec is the compressive strain, just before failure, inch per inch, considered positive, et is the tensile strain associated with ec, inch per inch, considered positive.

Download PDF sample

Bending solid wood to form by Edward C. Peck, U.S. Forest Service

by Brian

Rated 4.21 of 5 – based on 22 votes