Screw Factory Talk About The Production Process Of Screws
The screw factory said that there are many production processes for screws. As the saying goes, it is good to learn from a mistake, an industry has an industry norms and processes, different products all have different raw materials, different processing processes, different processes, if you are willing to have an in-depth understanding of an industry, then the understanding of its expertise and basic processes is very important. Even for an item as small as a screw, its manufacturing process is different. The production process of screws has 8 main parts.
1, plate yuan: that is, according to the specific provisions, to find out the factory plate, product name, specifications, materials, net weight and its total number of prerequisites to come down to the manufacturer to purchase the appropriate plate round.
2, pickling: in addition to the wire surface of the oxide film, but also in the metal surface to form a layer of polyphosphate plastic film, in order to reduce wire drawing and its cold pier or molding and other production processes, the mold shell abrasion.
3、Wire drawing: cold-drawing the wire to the required diameter. Good for a part of the goods and can be divided into coarse extraction (dial shell) and fine extraction of two stages, the way for the plate element after pickling, according to the wire drawing machine cold pull to the required wire diameter. Applicable to large screws, screw caps, tooth bar common wire.
4、Punching head: the top pier of the screw head is punched out to form the screw look.
5、Tooth rolling: Rolling or tapping the formed semi-finished product to achieve the required external thread.
6, heat treatment: the object and purpose of different heat treatment methods can be selected mainly aging treatment steel: heat treatment after high-temperature quenching (500-650 ℃); spring steel: heat treatment after medium-temperature quenching (420-520 ℃); nitriding steel: carburizing after heat treatment and then ultra-low temperature quenching (150-250 ℃) these three treatment methods.
7, electroplating: according to a certain way in the product surface to form a cover process, the goal is to endow the product surface beautiful, corrosion-resistant effect, the surface treatment, mainly electroplating, hot dip galvanizing and mechanical equipment plating three kinds of solutions.