Influence of edging process on the quality of steel drum
With the increasingly fierce competition in the product market, users' demands for product quality continue to increase, and steel drums as metal packaging containers are not lost, even though domestic barrel manufacturers are adopting different equipment and improving process equipment to varying degrees. Improve product quality, but there are still many unsatisfactory places. This article describes the factors affecting product quality and solutions and suggestions from the process requirements for manufacturing steel drums.
The quality of steel drum products is mainly reflected from three aspects: the quality of the curling edge, whether it is leaking at the curling edge, whether there are burrs, sag angles and iron tongues; the quality of the weld seam is whether the seam surface is flat, whether there is no welding And leakage phenomenon; the appearance quality is whether the paint film is smooth and smooth, whether the color is uniform, whether there is wrinkle and runny phenomenon and whether the adhesion of the paint film is firm.
Judging from the process investigation of the same industry in China, the thickness of the edging of the barrel body exceeds the standard, which is the main factor affecting the quality of the steel barrel curling. Therefore, we analyze the quality problem of the barrel edging as a subject.
I. Process requirements and current status
The process requirement of 200L steel drum is that the thickness of the barrel body is 0.8mm, and there is no scorch and bruise on the appearance. However, the measured result is that the thickness is between 1.1 and 1.2 mm, that is to say, the grinding amount is only 0.05-0.15 mm, so the process requirements are not satisfied.
Second, the impact of process quality on product quality
The main purpose of the edging process is to improve the surface condition of the seam seam of the barrel and remove the oil, rust and scale, so as to ensure the quality of the seam welding, that is, to ensure the welding strength and leakage resistance of the finished barrel. The second is to reduce the thickness of the gap weld lap, so that the weld is not too thick and affect the subsequent process, especially the quality of the crimping process. The edge of the welded joint is too thick, and the number of layers of the weld bead is more than that of other parts when the bead is edged, and the degree of tightness of the bead of other parts is inconsistent, so that the "triangular zone" leaks or the whole circle leaks. This is an Achilles heel that affects product quality.
Third, the reasons that affect the quality of the process
There are many reasons for the excessive thickness of the edging, but there are mainly the following factors:
1. Due to the constraints of the process, tooling and production equipment, the thickness requirements are difficult to achieve.
According to the survey, most domestic barrel-making enterprises generally use steel barrel edging machines or grinding wheel edging machines. The structural characteristics of the grinding wheel edger are composed of eight grinding wheels, two of which are upper and lower. The sheet of the barrel of the steel barrel is pushed by the stopper and fed into the narrow gap of the upper and lower grinding wheels along with the conveyor chain. Both ends are simultaneously ground under the clamping of the upper and lower grinding wheels. Since the front and back sides of the steel plate are simultaneously ground, the amount of grinding at one time cannot be too large, otherwise warping or scorching, high temperature oxidation and the like will occur, and the welding is disadvantageous in the opposite direction. The barrel-making enterprises use one-time edging for the grinding of ordinary steel plates. This is the main influencing factor for the thickness of the steel barrel barrel to reach the thickness of the process. If no new technology or equipment is used, this problem is not The solution was completely solved.
2, the edge is easy to make the steel barrel body deflection.
The large amount of heat generated during the edging process often causes thermal deformation of the barrel body and deflection. The occurrence of deflection leads to the following problems:
The barrel body can't be edging many times. Due to the deflection, the two ends of the plate are often tilted up. When grinding twice, the raised corners often cause the grinding wheel to be worn to become a corner.
The curved barrel is rounded and welded into a barrel. It is not round enough due to the shape of the barrel. The phenomenon of “big belly†often occurs. Of course, the occurrence of this phenomenon has a great relationship with the welding deformation.
Fourth, ways and suggestions to solve quality problems
The barrel edge grinding process is a relatively backward process in the barrel making process. In order to fundamentally solve the quality problem of this process, it should start from the process method and production equipment. At present, there are many advanced methods at home and abroad. Such as weld seaming machine and milling machine with milling and grinding, etc., if the new equipment and new technology are not used, and the backward edging process is continued, the quality problem of edging will be difficult to solve.
In addition to the product quality requirements, the old edging process has many shortcomings. In summary, there are mainly the following:
The production environment is extremely harsh. The dust formed by the grinding wheel powder and the iron has caused the smoke in the workshop to suffocate, and the strong harsh noise has seriously polluted the environment and affected the physical and mental health of the employees.
The grinding wheel wears quickly, and the wear in the production and the wear of the grinding wheel cause a large consumption of the grinding wheel and increase the production cost.
The manual operation of the grinding wheel feed makes the process quality difficult to stabilize, and it is impossible to carry out automated production.
It can be seen from the above analysis that the reason why the thickness of the barrel plate is not up to the process requirement is mainly the backward process method and equipment. To change this condition and improve the product quality, new process methods and advanced equipment must be adopted.
Professional Chef Knife Set,Kitchen Knife Set,Magnetic Kitchen Knife Set,Kitchen Knife Set Magnetic
Yangjiang Yado Kitchen Industry Co., Ltd. , https://www.yadokitchen.com