Basic knowledge of hardware fasteners

Hardware buckle is a generic term for the hardware industry. It refers to various metal buckles, which involves a wide range of fields, including bags, clothing, shoe materials, leather goods, etc. such as hardware belt buckles, hardware buckles, hardware pin buckles, hardware buckles, hardware buckle, hardware D buckle, hardware buttons, hardware buttons, hardware pair buckles. Hardware round buckle and so on.
2 classification
Hardware belt buckle:
Metal belt buckle, usually made of copper, iron or zinc alloy, is divided into pin buckles, plate buckle, automatic buckle, roller buckle and other types, widely used in clothing, belt, ribbon industry, playing the role of tightness and decoration.
Hardware dog buckles:
Metal Dog buckles, zinc alloy die-casting, used in all kinds of handbags, bags, mainly used in the bag or the end of the rope, so that the belt can be conveniently fixed on the D buckle or other round buckle.
Hardware pin buckle:
Hardware pin buckle, a wide range of applications, mainly used in clothing accessories, box and bag accessories, belt, belt, gift and other fields, divided into egg type, square, round, D type, three type, Japanese typeface and so on.
Hardware D buckle:
Hardware D buckle, the material is generally divided into three kinds of copper, iron, zinc alloy, copper, iron made of D button has a fracture, unless the welding, zinc alloy has no fracture, widely used in the production of box bags. The quality assurance of parts has always been a matter of great importance to mechanical processing enterprises. But in the actual production, there are some problems in the process of stamping, and the following drawing oil manufacturers “chemical” to sum up, let everyone in the future production can be used for reference.


1. The twisting of the metal stamping parts
Stamping parts in progressive die, by punching cut around the expected method to form stamping parts. The overturn of stamping parts is mainly due to the tensile strength of the material on the die surface. Therefore, the stamping and stretching oil factory “chemical” proposal when pressing, pressing and compressing material is the key to prevent the stamping material from turning and twisting. Causes and Countermeasures of stamping and twisting during stamping.
The stamping and distortion of punching parts resulted in poor forming after bending, which needs to be solved from blanking blanking station.  This is mainly due to the fact that the stamping parts are not stable enough, so the way to solve the problem is to guide the guide position and bend in the bending process before bending, and to press the material to prevent the sliding movement of the stamping parts from bending in the bending process.


Two. The tearing of the metal stamping parts
According to the actual production situation, through the inspection of the tear part, the fracture shape and the degree of extrusion, the “chemical” of the punching and drawing oil manufacturer is found to cause the tear and the skew to be mainly reflected in the flanging forming process. Therefore, this process needs to be paid attention to, so the main reasons for this process are as follows:
1. The forming process parameters are not in place
In the forming process of the workpiece, the process requires that the die, the material core and the two must be closely combined, and the plastic deformation of the sheet is formed when the slide block of the machine is slid. However, in the process of pressing, the quality of the parts is unstable, the main reason is that the processing technicians have not adjusted the pressure of the machine tools at this stage, resulting in the problems of stability and the instability of the quality of the parts.
2. Defects in the design of flanged forming die
The mold for the first mock exam double cavity, because this process in addition to the content of flanging, with shape, with special complex curved surface parts, narrow, forming requirements of die material core and forming surface character, resulting in the mold structure forming conditions to form large, small volume of binder. The “chemical” of the punching and drawing oil manufacturer thinks that this is mainly due to the fact that when the personnel are involved in the original mold design, only the small pressure surface is considered to be small, and the forming of the core forming is ignored.


Three. Measures for improvement
1. Select suitable high quality stamping oil
In stamping and drawing processing, stamping and drawing oil is a necessary auxiliary product. Through the analysis of the well-known stamping and drawing oil factory chemical industry, it is found that the factors that affect the rate of stamping and drawing are roughly the precision of the stamping equipment, the level of the operator, the performance of the material, the rationality of the mold design, the condition of the stamping die and the quality of the stamping die. The factors that affect the yield of stamping and drawing are very complicated, and stamping and drawing oil is also one of the important factors that affect the success or failure. The special purpose of stamping stretch oil is very strong, and the application scope is narrow. Therefore, when selecting the stamping stretch oil, we must carefully investigate the following aspects. Stamping and drawing process: blanking, drawing, drawing thinning and bending. The material of the workpiece is aluminum, copper, alloy and silicon steel sheet. (3) deep drawing coefficient and deep drawing times. 4. The tonnage and working speed of the punching drawing machine, and the shape of the workpiece.