what is the wire harness Connector technology terms?

what is the wire harness Connector technology terms?
Let's talk about the wire harness Connector technology terms?
 1、 Welding conditions

Introduction: general connector products will be welded to the circuit board for use. Welding is the core of the whole process. Both pre welding preparation and post welding processes focus on obtaining products that meet the requirements of welding connection. With the popularization of wave soldering technology, new requirements are put forward for the welding applicability of connectors. The conditions of welding are divided into: the conditions of welding connection are divided into: 1. The weldment must be weldable, and the surface of the weldment shall be kept clean. 3. Use appropriate flux to help determine the temperature and time

2、 Surface plating

Introduction: the hardware part of the connector usually requires surface electroplating of tin, gold, nickel, etc. Electroplating refers to a surface processing method in which the cations of the pre plated metal in the plating solution are deposited on the surface of the base metal by electrolysis in the salt solution containing the pre plated metal, with the plated base metal as the cathode. Electroplating is the basic guarantee of connectors.

3、 Hardware material

Introduction: Hardware refers to five kinds of metal materials: gold, silver, copper, iron and tin. Traditional hardware products are called "hardware". It points out five metals: gold, silver, copper, iron and tin. After manual processing, it can be controlled into works of art or metal devices such as knives and swords. Connector raw materials generally refer to plastics, hardware, coatings, electroplating, etc. The performance of connector hardware material determines the elastic performance of connector contact point, which is the key factor of connector quality. Many connectors need to be inserted and pulled out frequently, which requires good contact elasticity.

4、 Plastic material

Introduction: it is a high molecular compound formed by addition polymerization or polycondensation reaction with unit as raw material. The main component is resin. Most connector products use engineering plastics such as p.b.t, P.V.C, P.P.S, Shang. C.P and nylon66. The use of excellent plastic material is the guarantee for the normal operation of the connector within the design temperature range for a long time

5、 Space distance

Introduction: (pitch) - usually refers to the center distance between two laterally adjacent insertion points (pins) of the insertion part in the connector product. One digit is mm. This is the basis of the most important overall size of industrial connector products

6、 Insulation impedance

Introduction: specify the resistance value presented by applying DC voltage to the insulating part of the connector, so as to generate leakage current on the surface or inside of the insulating part. If the insulation resistance value is low, it may form a feedback circuit, increase power loss and cause interference. Excessive leakage current can produce heat or DC electrolysis and damage insulation, causing short circuit, danger and safety.

7、 Insertion force and pull-out force

English: insertion force the ability required to plug a male guide wire into the mother's socket. Withdraw force: Generally speaking, the force required to transfer another lead from one terminal must be at least 0.5 ounces. Purpose of connector plug-in and pull-out force: in order to ensure the reliability and stability of the connector after adaptation, this standard is formulated according to eia-364-13c (International Electrical Association plug-in and pull-out force test specification). The insertion force and pull-out force are maintained under a fixed force for a period of time. This force is called retention force.

8、 Polarity

Introduction: polarization is the arrangement of terminals and strip lines, which prohibits the unsuitable coupling of plugs and sockets. Polarity refers to that the positive and negative poles or the first pin of the component and the positive and negative poles or the first pin on the PCB are in the same direction. If the direction on the components and PCB is not answered in time, we call it reverse bad

9、 Salt water spray test

Introduction: salt spray test (salt spray test): a corrosion test using electroplating or air tightness from the test connector. It is divided into two categories, one is natural environmental exposure test, the other is artificial simulated salt spray accelerated environmental test. Artificial simulated salt spray environment test is to use a test equipment with a certain volume space - salt spray test chamber, and use artificial method to create salt spray environment in its volume space to evaluate the salt spray corrosion resistance and quality of products.