The influence factor that points to jointing timber lax
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The influence factor that points to jointing timber lax
1. The influence of the inner hole and the outer diameter of the finger cutter on the finger joint. If the tolerance of the inner hole of the finger cutter is out of tolerance, the outer diameter of the finger cutter will be affected. We install a group of finger cutters on the shaft. Because the holes of individual cutters are large, the cutters may be biased. At this time, the outer diameter of the cutters will be different. In addition, if the tolerance of the outer diameter of the manufacturing finger joint cutter is out of tolerance, the outer diameter of the finger joint cutter will be different, the depth of the finger joint material processed by the finger joint cutter with different outer diameters will be different, and there is a gap between the tip and the side of the spliced finger joint material. (commonly known as the eye of a needle)
2. The influence of the angle of the finger cutter on the finger joint. Here, the angle of the finger cutter is mainly the oblique angle of the finger cutter. When other conditions are the same, the smaller the angle of the finger cutter is, the larger the contact surface is, and the greater the finger strength is. On the contrary, the larger the angle of the finger cutter, the smaller the contact surface and the lower the finger strength.
3. The influence of the depth of fingering on fingering. The deeper the finger joint is, the larger the contact surface is and the stronger the finger joint is. On the contrary, the shallower the fingering is, the smaller the contact surface is and the lower the fingering strength is. But the deeper the finger connection, the more expensive it is.
4. The influence of the precision of finger cutter on finger joint. As mentioned earlier, the accuracy of finger joint cutter includes flatness, parallelism, perpendicularity and end jump. Detecting the accuracy of finger joint cutter is a means to control the internal quality of finger joint cutter. The out of tolerance of the flatness and parallelism of the substrate end face of the finger cutter will affect the end jump of the blade and the angle of the finger cutter.
5. The influence of different depth of workpiece processed by finger cutter on finger joint. On the contrary, the shallower the workpiece, the tighter the finger fit.
6. Regular grinding of finger joint cutter. After the finger cutter is used for a certain period of time, the edge will not be sharp and the workpiece will be pasted. Therefore, the cutter should be polished regularly. After grinding tools, they should be placed in groups. Because some tool groups have been polished once, and some tool groups have been polished several times, the wear degree of tool groups is different. When grinding the tool, only the front of the tool is ground, and the outer diameter of the tool is detected after grinding. After grinding, the rake angle and addendum of the tool have changed, so it is necessary to adjust the finger joint depth when machining the workpiece.
7. Human factor. The personnel should be trained regularly. The personnel on duty should learn how to operate the machine tool, how to clamp the cutting tool, how to clamp the wood, and pay attention to the safety in the work. Here I will mainly talk about finger knife. Before using the finger knife, we first check the end face of the inner hole of the finger knife to see if there are any impurities, clean it up, see if the edge of the finger knife is sharp, whether there is a broken edge, and take out the knife with a broken edge. The second step is to check the axis and end face of the equipment. The axis and end face of the equipment should be set vertically. Third, when clamping the cutter, the rotation direction of the cutter should be opposite to the direction of wood feeding.
8. The influence of the device on finger joint. The equipment must be placed on a solid floor, the equipment should be placed in a horizontal state, the axis of the equipment should be vertical to the horizontal plane, the end face of the axis should be vertical to the axis, and the two planes of the pad should be parallel. After using the equipment for a period of time, it needs to be adjusted, because the sliding seat and V-shaped guide rail under the workbench of the equipment will be loose after wear.
9. The influence of wood on the finger joint. Such as wood material, wood moisture content, wood core, and surface material. The softer wood is easy to process, but easy to change. The harder wood is difficult to process, but not easy to deform. Stress concentration is easy to tear. The higher the moisture content of wood, the easier it is to deform, and the harder the core is than the surface. The wear of wood is different when a finger cutter is used to process different wood.
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