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The machining process of solid wood parts tells you where the fine carving and tenon and tenon combination come from!

by:Jinlon Furniture     2022-02-20
The clean material processing of solid wood parts is the process of processing the parts blanks after the preparation of materials into parts that meet the requirements of the drawings. Its main task is to mill, tenon, drill, groove and surface sand. Light and other processes are processed into semi-finished parts to be assembled. Solid wood parts molding processing Solid wood parts molding processing, as the name implies, is to make wood parts into the shape we want through milling and other process steps. According to the shape characteristics and processing technology of solid wood parts, common solid wood parts can be roughly classified into the following categories. Straight profile: the part is linear in the longitudinal direction, and the cross section is linear or profile, such as various decorative lines, etc., as shown in Figure a. Processing of linear parts: The straight-through parts can generally be directly planed by four-sided planing in the material preparation process, and the lower shaft milling machine, router, wood threading machine and even Special press planer for production. The four-sided planer has high production efficiency and high quality, but it is expensive and difficult to debug, suitable for mass production. Small batch production is suitable for processing using vertical milling machines. Two-dimensional curved surface: One surface of the part is flat (thickness direction), at least one side of the other surface (width direction) is curved, and the curved surface is flat or shaped, or both ends of a straight part are curved. Figure b, c, d. Processing of two-dimensional curved surface parts: Before the curved surface parts are processed, the rough blank is usually cut out with a joiner band saw or a jig saw. Of course, it can also be obtained by preparation methods such as multi-layer glue bending or solid wood pressure bending. For the curved blank, the two faces with the same thickness are first processed into net specifications by flat planing and press planing, and then milled. Commonly used equipment for this type of processing is a lower axis milling machine. When the line is small, a router can be used. For linear parts that meet the characteristics, an automatic double-sided profiling milling machine (profiling milling) can also be used. Arcs with uniform thickness and large radius of curvature Shaped parts can also be produced by press planing. Simple three-dimensional profile: The width and thickness of the parts have curves, usually one side is a curved plane (such as solid wood curved parts, etc.) or a simple knife shape, and at least one side of the other side is curved. The entire part section can have a simple knife type. As shown in Figure ef. The processing principle of simple three-dimensional surface parts is basically the same as that of two-dimensional curved surface parts, except that the required clamping and positioning methods and molds are more complicated, and usually require multiple milling to complete. In general, a simple three-dimensional profile component can be regarded as a combination of several relatively independent two-dimensional profiles. Three-dimensional complex contours: At least one of the longitudinal and cross-sections of the parts are irregularly curved, as shown in h, the legs and feet of many classical furniture are mostly of this type, such as goose crown feet, tiger feet, elephant nose feet and so on. Wide-format parts profile processing: The inner and outer contours of wide-format parts or sheets can be processed by rotary table profiling milling machines, routers, vertical shafts, press planers and even CNC milling machines. There are two types of rotary table profiling milling machines, one is the ordinary outer profiling milling machine, and the other is the inner diameter profiling milling machine. Various shapes and lines formed by mirroring the inner and outer contours or surfaces of wider parts or jigsaw parts. Figure g. Tenon, mortise and tenon-groove processing Tenon-and-mortise joint is the basic joining method of frame structure furniture. For parts joined in this way, a tenon, mortise or groove must be opened in the corresponding part. Traditional joints mainly use right-angle tenon and square tenon, dovetail tenon and trapezoidal tenon. Modern furniture mainly uses long round tenon and long round tenon, round tenon and hole. The matching accuracy of the mortise and mortise has an important influence on the assembly quality of the furniture, which is directly related to the convenience of assembly and the joint strength of the product. During the production process, the following points should be paid attention to: Strictly control the distance between the two tenon shoulders and tenon. The angle between the cheek and the tenon shoulder is adapted to the parts to be joined to ensure the correct size and tight joint of the parts or products after joining; the processing accuracy of the tenon and mortise is affected by the state of the processing machine itself, the specifications of the tool and the adjustment of the machine. The precision has a great influence. Therefore, when the machine is produced and adjusted, it is generally necessary to trial manufacture and test assembly to ensure the matching accuracy; whether the square material precision cutting and the tenoning head use the same fixed reference plane, which will also affect the processing accuracy of the mortise and mortise, so before making the tenon The fine processing of wool must be standard, and the same positioning datum should be used as much as possible when making tenon; there should be no debris, shavings and other debris on the worktable when making tenon, and the processing should be stable to ensure the shape tolerance; the tenoning tool should be kept sharp And the size is accurate to maintain the surface quality and dimensional accuracy of the tenon and mortise; the matching accuracy of the tenon and the mortise is affected by the temperature and humidity of the processing environment. It is necessary to prevent the poor fit due to the dry shrinkage and swelling of the wood from affecting the assembly operation. Extended reading: Innovative application of traditional tenon joints in furniture. Tenon processing equipment mainly includes square tenon tenoning machines, oblong tenon tenoning machines, vertical shaft machines, routers, and sometimes universal saws and band saws. , It's just that the efficiency or accuracy is low. Mortise processing matches with mortises, and there are also square mortises, long round mortises, dovetail mortises and round mortises. The corresponding processing methods and equipment are also different.
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