In the general business scope, you can fill in the sales of mechanical equipment, electronic equipment and building materials. , including hardware and electric materials, must be approved by the industrial and commercial bureau. Hardware products are usually divided into two categories: large hardware and small hardware.
Among them, the big hardware mainly refers to steel plates, steel bars, flat iron, universal angle steel, channel steel, I-beams and all kinds of steel, while the small hardware includes building hardware, iron sheets, locking nails, iron wires, steel wire mesh, steel wire scissors, household hardware and various tools.
From the nature and use of hardware, it can be divided into eight categories: iron and steel materials, non-ferrous metal materials, mechanical parts, transmission equipment, auxiliary tools, working tools, building hardware and household hardware. Wujinjiaodian is actually an informal name.
The business scope of Wujinjiaodian includes:
Wujinjiaodian mainly includes lock hardware, door and window hardware, home decoration hardware, bathroom hardware and kitchen hardware.
1.？ Lock hardware also includes: external lock, handle lock, drawer lock, ball lock, glass window lock, electronic lock, chain lock, anti-theft lock, bathroom lock, padlock, number lock, lock body and lock core.
2.？ Door and window hardware includes hinges, hinges, rails, bolts, door suction, ground suction, ground spring, door clamp, door closer and plate pin.
3.？ Hardware for home decoration includes: washbasin faucet, washing machine faucet, delay faucet, shower head, soap dish rack, single cup rack, double cup rack, tissue holder, toilet brush rack, single towel rack, single shelf, multi-layer shelf, towel rack, hanging mirror and soap dispenser.
4.？ Kitchen hardware includes: kitchen cabinet basket, kitchen cabinet pendant, sink, sink faucet and scrubber.
Extended data:
Rockwell hardness tester is used to test the hardness of metal stamping parts. It can be tested with small-sized stamping parts with complex shapes, and the plane is too small to be tested on the common table Rockwell hardness tester.
PHP series portable surface rockwell hardness tester is very suitable for testing the hardness of these stamping parts. Alloy stamping parts are the most commonly used parts in the fields of metal processing and mechanical manufacturing. Stamping is a processing method of separating or forming metal strip by using die. It has a wide range of applications.
Stamping includes blanking, bending, stretching, forming, finishing and other processes. Stamping materials are mainly hot-rolled or cold-rolled (mainly cold-rolled) metal strips, such as carbon steel plates, alloy steel plates, spring steel plates, galvanized plates, tinned plates, stainless steel plates, copper and copper alloy plates, aluminum and aluminum alloy plates, etc.
1. Hardness detection of stamping materials
The main purpose of hardness testing of stamping parts materials is to determine whether the annealing degree of purchased sheet metal is suitable for subsequent stamping parts processing. Different kinds of stamping parts require different hardness grades of plates.
The aluminum alloy plate used for stamping parts processing can be tested by Wechsler hardness tester. When the material thickness is greater than 13mm, it can be replaced by Buckley hardness tester, and the pure aluminum plate or low-hardness aluminum alloy plate should be tested by Buckley hardness tester.
2. Hardness detection of stamping die
The main material of stamping die is die steel (including tool steel and high speed steel), and sometimes cemented carbide is used.
Stamping dies usually require high hardness and wear resistance, and heat treatment is essential.
Mechanical properties refer to the characteristics of metal materials under the action of external forces.
1, strength: the ability of a material to resist deformation and fracture under external force (load). The load per unit area of a material is called stress.
2. Yield point (бs): called yield strength, it refers to the stress value when the load does not increase and the deformation continues to increase or produce 0.2%L when the stress on the material reaches a critical value in the tensile process, and the unit is Newton/square millimeter (n/mm2).
3. Tensile strength (бb), also known as strength limit, refers to the maximum stress that a material bears before it breaks. The unit is Newton per square millimeter (n/mm2).
4. Elongation (δ): the percentage of the total elongation of the material after tensile fracture to the original gauge length.
5. Area shrinkage (ψ) The percentage of the maximum reduced area of the cross section to the original area after the tensile fracture of the material.
6. Hardness: refers to the ability of a material to resist the pressure of other hard objects on its surface. Commonly used hardness can be divided into Brinell hardness (HBS, HBW) and Rockwell hardness (HKA, HKB, HRC).
7. Impact toughness (Ak): the ability of materials to resist impact load, in joule per square centimeter (J/cm2).
References:
Baidu encyclopedia-hardware