Screws are a type of threaded part with a sharp tip, such as a nail, a small cylindrical or conical metal rod, with a slotted or dimpled head, used alone.
Screw picture
How to detect the quality of screws
The first detection of the screw should begin with the wire of the screw. The quality of the precision screw is directly related to the wire that produces the screw. Good screw wire screws are more beautiful. What screw head burst, ah, what thread is not good. Good screw wire will generally not find this situation.
Followed by the formation of the head of the screw testing, in the screw forming, the first test of the production of screws. A good mold can produce a good screw product. This is a machine test for the production of screws, which is conducive to safe and smooth production. The appearance of the formed screw is checked to see if there is any burr, and the length of the forming screw is tested. Look at the size of these dimensions are not in line with the national standard or the specific requirements of customers.
The second is the detection of screw cavities. Of course, the first thing that screws and fangs occupies is the dental plate. The tooth that comes out of the good tooth plate must pass through the regulation. General regulations, only regulations. There is also the thread pitch and other tests. It is also necessary to comply with screw GB standards or customer requirements.
Finally, the color of the electroplated screws was tested and the salt spray test was performed. Look at the color of the screws that are electroplated back. How smooth the surface of the screw is. The salt spray test detects the rust time of the screw or the number of hours of salt fog screws that will rust. After that, the shipment of screws was tested. The method is to pick out the defective screw. Give the best quality screws to your customers. Guarantee screw quality.
Screw price
Screws are an indispensable industrial necessity in everyday life. Screws have an important task in the industry. As long as there is industry on the earth, the function of screws is always important. Screws are a common invention in the production and life of people for thousands of years. According to the application field, it is the largest invention of human beings. Screw types: Machine screws, self-tapping screws, set screws, set screws.
Screws vary according to the brand, type, and material, and the price is not the same. The price for buying a screw is generally between 1 and 20 yuan.
The general price for buying a screw is about 5-15 yuan, depending on the quantity you want to purchase. Screws are tools that use the physics and mathematics of an object's beveled circular rotation and friction to gradually fasten fasteners. The main purpose of the screw is to make the industrial product to be fixed and integrated. In use, it often occurs that the tooth cannot be closely adhered to the tooth, and if the screw head is broken too tightly, or the screw head is broken, or the bad lock of the teeth is not tight, the use condition cannot be met. The accuracy problem.
Screws are an indispensable industrial necessities in daily life: tiny screws such as cameras, eyeglasses, watches, and electronics; general screws for televisions, electrical products, musical instruments, and furniture; and large projects for engineering, construction, and bridges. Screws, nuts; transportation equipment, airplanes, trams, cars, etc. are screws and screws. Screws have important tasks in industry. As long as there is industry on the earth, the function of screws is always important. The price for buying screws is generally around 60 yuan.