Hex lag screw
wood screw
Hex head screw
Contact Us
Haiyan Tianqi Fastener Co., Ltd.
  • Add:Jiaxing Haiyan China NO.1-3 Jincheng South road, Qinshan Industrial Zone of Haiyan, Jiaxing
  • Tel:+86-573-86408971
  • Mobile Phone:+86-13606831322
  • Fax:+86-86408973
  • E-mail:472660558@qq.com
  • Post Code:314300
  • Skype:tianqi

About the quality of screws

The further optimization of the current product structure is an important strategic shift for fastener companies. The gradual transformation of low-carbon steel hexagonal screws into A194 2H screws, which mainly produces medium-carbon steel, will enable the company to obtain more profitable space. For this reason, the quality has higher requirements on the production process and preparation of screws. In the face of such structural adjustments, it is necessary to formulate quality control plans and inspection specifications from the following aspects.
First, the preparation before the output;
The second is the random inspection in the output;
Third, the final inspection after the quantity is released.
First of all, the pre-production preparation includes: related personnel, equipment status, mold equipment, production process, raw materials, etc.
However, the first item involves three major aspects: a, mold preparation; b, inspection method; c, the control of the production process, leading to higher requirements for these parts.
First look at the mold preparation: from order to mold planning to production, complete mold equipment is required. It can be considered that the production ahead provides satisfactory preparations and does not delay production due to molds. This requires sufficient inventory to ensure this cycle. Generally it is about 20-25 days.
Secondly, inspection method: In this link, we should pay attention to the inspection of tools and methods. The most basic inspection tools we know include vernier calipers, micrometers, thread gauges, Rockwell hardness machines, tensile testing machines, etc., most of them Companies have always selected on-site follow-up inspection and sampling sampling methods.
Finally, it is the control of the output process: including appearance, method specifications, thread pass and stop, and mechanical properties. In order to ensure the use of screws, we first control the first three items, and the appearance can be completed by visual inspection. In order to control the accuracy of the internal thread, it is necessary to make an inner diameter lubrication plug gauge. The inspector and the operator have one set, which can easily check the standard screws; others rely on the production accuracy of the forming mold and the adjustment of the pressure in the production to ensure ; The requirements for mechanical properties depend on raw materials and heat treatment to complete. And we often neglect the most important element-the cultivation of the nature of workers.
Everyone is a single person, with his own characteristics and habits. Essential training includes; the principle of handling things, the production environment of the goods, the ideological education of the operators, the technical proficiency of the operators and the personal cultivation of the staff, etc. For example, the hexagonal screws we produced are the same. The six corners have six edges, and each edge is an important element.
Let our fastener companies not only produce high-quality hexagonal screws, but also cultivate a group of talents. This is where the vitality of the fastener company lies, and it is also where the quality advances.
Home   |    About us   |    Products   |    News   |    Technical support   |    Certificates   |    Contact us    |    Hexagon Washer Head Wood Screws