The quality problem of the elongated screw during the tapping process is the tightness of the teeth. The tightness is usually caused by the bending of the straight part of the tapping handle, the dullness of the tapping, the over-tolerance of the effective diameter, and the irregularities of the upper and lower tracks. In view of the reasons for the tightening of the teeth, measures such as orthodontic taps, replacement taps or runway adjustments can be taken.
Analysis of screw tapping defects:
A. Poor appearance: Poor appearance phenomena include: crooked rod, rough tooth bottom diameter, insufficient teeth, tail teeth not rubbed to the tip of the tail, etc. It can be improved by adjusting the dental plate.
B. Poor tooth bottom: For tooth bottom peeling (such as wood screws), you can adjust the quick-entry angle and the upright angle of the fixed tooth plate, and push the quick-entry angle inward appropriately.
C. Poor tooth tip (small teeth rolling): Poor tooth tip phenomenon includes: tail tip crack, fire, crooked tail, tail docking, blunt tail, etc. It can be improved by adjusting the dental plate or replacing the dental plate.
D. The outer diameter of the tooth is too small: The first reason may be that the tooth is not full, just adjust the relative position of the tooth plate, and secondly, it may be that the effective diameter of the molding is too small.
There are many kinds of electroplating of iron combination screws: ordinary and environmentally friendly. For example: color zinc, generally called red color. White zinc, black zinc, white nickel. Blue zinc. There are environmentally friendly color zinc, environmentally friendly white zinc, and environmentally friendly blue zinc. Environmentally friendly white nickel. There are more advanced ones. Nickel on copper, nickel in brine. Tools/Materials Screw wires, iron screw wires include 1010, 1018, 10B21, etc. Stainless steel screw wires include SUS201, SUS304, etc. Steps/Methods The requirements for the material of the combined screw depend on which material is required, whether it is iron or stainless steel. What is the national standard number of the combination screw? There are GB9074.8 and GB9074.4. There are GB9074.13 and so on. The mechanical performance and strength requirements of the combined screw need not be hardened. The level requirements are divided into 4.8 and 8.8 l...
评论
发表评论