Quality standard of each working procedure of woodworking workshop for solid wood production process
As we all know, solid wood production process is very complex. In order to ensure the quality of products, each enterprise will compile the corresponding process standards to guide production The requirements and quality standards for materials in solid wood production and wood processing are collected, including the quality standards for each working procedure of the woodworking workshop, the nine inspection standards for the product quality of the paint workshop, and the seven inspection standards for the product quality of the packaging workshop.
This article mainly introduces the quality standards of each working procedure in the woodworking workshop, so as to provide selective learning and reference for the relevant personnel of the enterprise.
Quality standard of each working procedure in woodworking workshop
- Opening quality requirements
It is required to avoid big dead joint, core material, crack, black water mark, moth, decay, the length of broken material shall be within 5mm-10mm according to the specified dimensional tolerance, and the vertical tolerance of cross section of parts shall be within 3mm.
Main control points: surface quality, length and thickness.
- Quality requirements for plane plane
The parts must be planed along the direction of wood grain during processing, and there shall be no deep reverse grain pinhole and coarse burr. The side angle is 90 degrees. The planed edge surface must be flat without concave convex, knife jumping and wave.
Main control points: surface quality, angle, size, plane surface distinction.
- Quality requirements for use of press plane
The parts must be processed along the wood grain texture, and the quality of one-time planing shall be controlled within 2 mm. The angle tolerance of solid wood parts is ± 1 degree The deformation tolerance of solid wood parts shall be controlled within 0.5mm within 500mm, within 1mm within 500-1000mm, and within 1.5mm above 1000. Dimension tolerance of solid wood parts shall be controlled within ± 0.8mm.
Main control points: surface quality, chipping, knife jumping, angle, deep hole burr, deformation, etc.
- Panel quality requirements
Use the specified glue instead of other glue. In color matching, the panels with the same color or similar color, the same wood and the same wood grain direction must be assembled as a whole, and the water content difference between any adjacent parts and panels shall not exceed 3 degrees.
Selecting high quality panel glue can speed up drying, enhance bonding strength, improve water resistance and weather resistance (hot and cold).
Top vertical panel glue
The size of panel line shall be controlled within 0.3mm, and the glue shall be evenly distributed. After the panel is unloaded, it must be stacked for 24 hours under normal temperature before entering the next process.
- Quality requirements for single side saw
The tolerance of the real dimension of the parts shall be controlled within 0.3mm. The flatness of the longitudinal surface of the parts to be spliced shall be controlled within 0.2 mm. There shall be no obvious saw marks on the longitudinal section. When the solid wood plate is longitudinally cut, its warpage shall not exceed 5mm.
- Quality requirements for band saw
According to the standard of die marking, the distance of saw line marking shall be controlled about 3-5mm outside the line during bending (Note: the actual die is 5mm larger) The surplus of the cutting head is 3-5mm.
- Tenon quality requirements
The tolerance of tenon length shall be controlled within (0-0.5mm) during part processing. If there is a tenon at the end of the processing surface, the tenon shoulder at one end shall be processed as the basis, and the tenon at the other end shall be processed to ensure the inner space. The hollow size of the tenon of the machined parts shall be controlled within ± 0.5mm.
If the tenon position of the part is in the process of machining, it must be ensured that the upper and lower end faces are 90 degrees vertical after machining. Processing of tenon position and tenon should refer to the process assembly structure to sort out the front and back processing.
- Quality requirements for use of lifting and drilling (or electric drilling)
Parts processing, to distinguish up and down, left and right, texture direction matching drilling. Deep hole depth is allowed to be within ± 1mm, hole diameter is ± 1mm, hole position deviation is within ± 0.5mm, perpendicularity deviation is within ± 0.2 degrees, screw hole depth tolerance is within ± 1mm, and all surfaces shall be free of cracks, burrs and other phenomena. If multiple hole positions are processed at one time, it must be ensured that the depth line of hole position is unified, and the hole diameter and process drawing are one to one.
Main control points: positioning size, hole diameter, hole depth, hole position perpendicularity, hole position deviation, surface quality, front and back sides, left and right symmetry, etc.
- Quality requirements of machine sand
Before assembly, the parts shall reach three levels of fine sand, which shall be free from roughness, skip marks, reverse grain machine sand marks, pinhole marks and other phenomena. The damaged or uneven and moldy parts shall be filled and sanded with AB glue; all knife shapes, process grooves and circular arc edge machine sand shall be smooth and free from deformation, and the parts assembly interface shall be sanded; the parts with arc edge position shall be sanded along the grain without reverse grain burr.
Main control points: unevenness, sand mark, smooth arc of pinhole, no deformation, visual inspection and good hand touch.
- Quality requirements for veneering and edge sealing
The edge sealing of the same set of parts shall be made of the same kind of wood skin. Wood veneer for edge banding shall be free of defects. There shall be no looseness and bubbling after edge sealing. In the process of edge banding, it is not allowed to scratch the veneer. Pay attention to protect the veneer when trimming.
Main control points: the surface is flat, the edge is not loose, and there is no bubble.
- Quality requirements for hand sand
All products shall be sanded along the direction of the grain of wood grain and shall not be cross sanded; all product parts (arc-shaped and circular parts) shall have smooth, smooth, fresh and even edges and corners, and the lines shall be uniform in thickness and without deformation error controlled within 1 mm; the parts with good sanding shall be free of wormholes, holes, burrs, undercuts, coarse cross sand marks or sand marks, and without missing angles Sand black, sand through, sand concave or deformation and other undesirable phenomena, after sanding, rough fuzzing, tearing and other phenomena are not allowed.
- Quality requirements for assembly and final assembly
When assembling the components, it is necessary to see whether the drawing requirements and the specifications of the supplied materials are consistent with the drawings. The edge strip shall be divided into front and back side matching and matching in the same color. When assembling the frame, it is necessary to reinforce the back side with clamps and punch the nails. When there is a knife shaped nailing, it is not necessary to nail too much to avoid hitting the knife. Before installing the product components, the parts must reach level 3 fine sand. If there is a knife shaped side plate and cabinet door core plate, the knife shaped position shall reach level 4 fine sand Sand, feel smooth without dents before assembly.
Main control points: overall dimension, diagonal, empty dimension in the frame, cabinet vertical, wood grain upward, gongs and nails not exposed, etc.