with the continuous improvement of the technical field, the structure and research and development technology of the terminal line have also been improved by generation to generation, and the terminal line manufacturers in china are also ushered in a change in the process of catching up with the foreign products of the same kind.
quality is the lifeline of the enterprise, and it is not feasible to climb the time. the performance of terminal line is suitable to meet the requirements of international standards. it is not necessary to excessively pursue high index and select components and raw materials reasonably and reduce the cost as much as possible. we should attach importance to the management of human resources and take the people-oriented approach. we should not only cultivate, respect and cherish talents, but also make rational arrangements and use, effectively play their role, and never waste talent resources. increase market share and capital recovery rate with the greatest amount of information and credibility.
with the increase of state support and the increase of private enterprise investment, local terminal line manufacturers are bound to usher in their golden age, but in this time, it is necessary to keep technology more advanced and surpass technology.
]]>before we choose connection line manufacturers, we have to know the different manufacturers, really know the different conditions of each manufacturer, so that we can better complete the choice. many people do things in the process, not in advance of the manufacturer's knowledge, so in the choice of time will have an impact, the situation is extremely important.
not only do we need to know the situation of the manufacturer, but we also need to identify the demand for the connection. this problem is directly related to everyone. it is very important for us to understand the situation of the various manufacturers and to understand the overall suitability of the products. are you really well understood?
everyone in the selection of connection line manufacturers do not blindly, have a targeted understanding of the situation of the various manufacturers, and have a further understanding of them, so that the better to complete the choice. before making a decision, some people ignore the power of the factory and ignore the different aspects, so the final choice is not satisfactory. learn to do a good job of the choice of manufacturers, we can find a better product, the use of the time will also be guaranteed, everyone should pay attention to conscientiously, to determine their own choice is right, but also to ensure that future use is not affected.
]]>1: cutting line
wire specification and color
length of wire cutting and length of stripper
the color and smoothness of the wire
]]>for the inspection of the elongation of the car harness, the inspection should be carried out according to the elongation and the relevant standards of the country. if the customer has special requirements, it should be strictly controlled according to its requirements. the specific step is to turn on the elongation tester's switch, and then carefully observe whether the inducer on the left is in the original position, the readings shown on the instrument are not zero. if the left induction clamp is not in the original position, the reading on the instrument is not zero, then it is to be set up. that is, press the recovery key and set the zero key. then gently open the induction clip, put one of the copper wires that need to be tested inside the induction clip, then press the induction clamp, straighten the copper wire and put the other end in another induction clip, press the induction clip, hold the wire and press the test key. finally, when the copper wire is broken and the wire has stopped moving, the reading number on the instrument is observed, the above reading is the elongation of the copper wire to be detected.
]]>1, covering. depending on the functional conditions of wires and cables, special equipment is used to coat different materials outside the conductor. specific can be divided into the following:
around the bag: mica belt, nonwoven fabric, banded paper tape, plastic bag and alkali free glass fiber belt. in addition to these, there are wire like silk and cotton yarn.
longitudinal bag: wrinkled aluminum belt and rubber and other materials.
squeezing: lead, plastic, rubber, aluminum and other materials.
]]>generally, the wiring harness is made up of an insulation sheath, a binding material, a wire and a connection terminal. so, only to know the material, it can easily distinguish the advantages and disadvantages of the harness.
1. selection of insulating sheath material
the material of the sheath is usually of the following kinds: abs, pa6, pbt, pa66 and pp. in the design of the plug-in, we can choose different materials according to different needs, and can also add reinforced materials to the plastic according to the actual conditions, so as to achieve the purpose of enhancement.
2. selection of material for wrapping
]]>the first is the acceptance of the material, which can be tested by the relevant instruments for environmental protection. after the test, we can see if it is in accordance with the standard of rohs. it can not contain harmful substances such as lead and mercury in the incoming material. then the wire feeding equipment is mainly placed on the middle transmission line rack which needs to be processed, and the surface of the wire must not be scratched. the next is line feeding, and the wire is fixed on the wire feeder. then it is the cutting line, is to use the cutting machine to cut the line to the right length, in doing this work, we should pay special attention, can not cut the surface of the wire, and can not cut off the copper wire, the length of the peeling error is best not more than 1 millimeters. the other is the stripping of electric wires. according to the standard requirements, the insulation skins corresponding to the length of the wires of the joints should be stripped. the error is also not more than 1 millimeters. in addition, it is the twisting line, in the joint of the place to arrange and twist the line, can not scrape the surface of the wire, must make the copper wire to tighten, it is not available in the case of silk. finally, connect the terminals, connect the conductors and plugs terminals, and pay attention to the width and height requirements.
when these processes are completed, the wiring harness is basically finished, leaving only the final assembly process. for example, assembly of products and assembly of plastic plugs must achieve the torque required by the product. the other is the conduction test, using the instrument to conduct wiring test, no breakage, poor contact and insulation. finally, the packing lamp sealed box, use tape to load the finished product into the carton, the seal should be smooth, the packing belt should be wrapped in the carton, and it can not appear in the case of falling off.
]]>1, the wiring harness is burned, this situation is usually sudden, and the speed of combustion is faster, in these burned lines, generally there is no insurance device. the wiring harness usually has a certain rule: where in the circuit of the power system, where to put iron, where the wiring harness will be burned, the wire in the place where it is burned and perfect, is the wire of this place; if the wiring harness is burned to an electrical wiring part, that means this a fault occurred in an electrical equipment.
2, the wiring harness was squeezed and impacted by the outside, causing the insulation layer in the wire bundle to be damaged, causing a short circuit between the wires, making some electrical equipment out of control, and fuse the fuse. if the line is in bad contact, then most of the faults occur in the connector. when the fault occurs, the electrical equipment will not work properly. when judging, the electric power supply, pull or touch the electrical equipment related connector, when encountered a connector, the electrical equipment can work suddenly, and suddenly can not work, that means that the connector has a failure.
]]>the wiring harness is mainly operated according to the circuit schematic diagram, so the first thing to do is to design the schematic diagram of the circuit, to define the installation position and wiring of each electrical component, so that the wiring harness processing can be standardized and computerized. it also helps to improve the automation level of wire harness production, and can effectively improve the production efficiency of the wire harness. it is also helpful to improve the information degree of the wire harness manufacturers.
through different means to make the wiring harness connection technology to achieve a more perfect state, so as to play the best performance in the device. generally speaking, in today's society, we want to improve the connection technology of wiring harness, which is inseparable from the related applications of advanced technologies such as computers.
]]>in terms of structure, the direction of the car harness processing is almost the same. in the outside, the polyester film must be wrapped around it. this can improve the insulation performance, prevent the copper wire oxidation. in the control of the insulated wire core, the high strength cloth is wound around the core, the small sheath is packed outside the cable core, and the pitch between the power line core 2 and the control wire core is smaller. where there is no filling and no core, the structure is relatively strong and compact.
if we need to do the experiment, we need to use the bending test machine in the simulation of the underground coal mining equipment to make the cable. this can simulate the modern working face, which can ensure its normal operation. the main thing is to use the mechanical direction exchange, the motor rotation is fixed, and the electric control is reduced frequently. the damage of the motive force prolongs the service life of the motor. ferguson suggests that the mechanical part can simulate the work site now, and the bending radius is within a certain range. it is necessary to test the performance of the car harness through a simulated test and automatically record the times of bending. it can detect the line core of the car harness and the control of the short circuit and circuit breaker. these two cases occur. it will alarm when it is used. it is of great reference value to analyze and compare the service life of different automotive wiring harnesses.
]]>if you want to avoid wiring harness, you need to pay attention to the installation and use of the wiring harness. first of all, we must take insulation measures; secondly, when connecting the power supply, we must carefully check if there is a short circuit, it is important to choose the way to check the device with the battery short circuit is very undesirable, easy to cause accidents.
when a wire harness is short circuited, the current will become larger and the heat generated will be directly fused at the junction of the wire, so that there will be a spark and a serious case of the explosion. therefore, the wire harness manufacturer and the user must not look down on the short circuit of the wire harness and do a good job of prevention. do.
]]>1, in the assembly, do not pull the harness too tight so that it can prevent the vehicle from running in a bumpy condition, causing the displacement of the fixed point of the wire harness, which leads to the increase of the distance between the two fixed points and the lengthening of the wire harness, thus causing the virtual connection of the inner contact of the wire harness or the change of the wire parameters. in serious words, the wire is broken.
2, after assembling the wiring harness, there must be enough clearance to be passed around to ensure that other components will not be pressed, not to be tripped by the components, to avoid the wear, rupture or clipping of the wire harness, resulting in grounding and so on.
3, not near the location of the layout of the color and the same type of connector, so that the assembly can prevent the occurrence of misinsertion, damage to the use of electrical appliances and wiring harness.
4. the inserts should be arranged in places where they are easy to find. they are arranged in places where the tools and hands are easy to operate. this is mainly for the convenience of inspection and maintenance. the length of the wire should be considered according to the actual assembly. if the electrical parts are installed in an easy to operate place, then you can save the connector directly on the parts. if the location of the installation is more secret, the later inspection and maintenance will be more difficult. according to the specific needs, the length of the conductor of the electrical appliance should be increased appropriately, so that the connector can be placed in a convenient place for inspection and maintenance.
]]>1, the classification of interfaces
the main function of the i/o interface is to implement the cpu. through the system, the i/o circuit and peripheral equipment are connected. according to the complexity of the circuit and equipment, the hardware of the i/o interface can be divided into the following two types:
(1), i/o interface chip
most of this type of chip is integrated circuit, which can input different parameters and commands through cpu, and control related i/o circuits and some simple peripherals to perform related operations. the common interface chips are interrupt controller, parallel interface, counter, dma controller and so on.
]]>1, cut the line: check the size of the wire is not in line with the relevant requirements, the model is not correct. the incision must be neat, no wires should be scratched, and the wires must not be contaminated.
2, marshalling: check whether the trim is neat, the size is right or not, and when trimming, it cannot be rowed to the core.
3, peel the outer skin: check whether the peeling mouth is neat, the size of the peeling is not right, do not strip the marshalling wire and core wire.
4, peeling the endoderma: check the peeling mouth is not neat, the size of the peeling is not right, the core line is not broken, there is no copper wire stripping; in half peeling, the insulators must not fall off.
]]>1. material testing: environmental testing of materials through the rohs instrument to test whether all the materials needed for wiring harness meet the rohs standard. required equipment: rohs testing instrument. process requirements: the materials needed do not contain any harmful substances, such as cadmium, mercury, polybrominated two phenyl ether, lead and so on.
2. wire feeding equipment: put the wires that need to be processed to the overhead transmission line rack. required equipment: feeder. process requirements: pay special attention to not scratching the surface of scratched wires.
3. wire feeding: put the wire on the wire feeder for fixing. required equipment: wire feeder. process requirements: pay special attention to not scratching the surface of scratched wires.
4, cut the line: use the wire cutter to cut the wire to the required length. required equipment: a computer tailoring machine. process requirements: the surface of scratched wire can not be scratched, and the copper wire can not be cut off. the length of the skinning must not exceed 1 millimeters.
]]>1. appearance inspection
put the spools filled with copper wire on the packing table, one hand holding a white paper in the distance of 1 to 2 centimeters from the copper wire, and the other hand rolling the thread of the copper wire for a week, and then to see if the appearance of the wire has reached the following criteria.
(1) the surface should be smooth, there is no disorder, no oxidation, and no scratches and so on.
(2) the line should be uniform, no stacking and lack of edges.
]]>automobile wires, also known as low-voltage wires, are different from ordinary household wires. the ordinary household wire is copper mono wire, which has a certain hardness. and car wires are copper cords, some soft lines as thin as hair, several or even dozens of soft copper wire wrapped in plastic insulated pipe (polyvinyl chloride), soft and not easy to break.
because of the particularity of the automobile industry, the manufacturing process of automobile wiring harness is also more special than other common harnesses.
the system of making car harness is roughly divided into two categories:
1. it is divided by european and american countries, including china:
]]>wiring harness is usually made up of wires, insulation sheath, wiring terminals and binding materials. as long as you know these materials, you can easily distinguish the quality of the harness.
1. selection of materials for terminal terminals
the copper used for terminal materials (copper parts) is mainly brass and bronze (the hardness of brass is slightly lower than that of bronze), and brass occupies a larger proportion. in addition, different coatings can be selected according to different needs.
two. selection of insulating sheath
]]>for example, the length of the line is within tolerance, and too long and too short can not be transferred to the next process.
peeling also has a length requirement, and can not hurt the internal core.
stripping head has length requirement, which is directly related to terminal specification.
the most important thing is that the tension must be up to the standard and the appearance of the terminal is ok.
]]>1.1 according to the production plan, collect the corresponding material list.
1.2 according to the list of materials, workers should go to the warehouse to collect the corresponding raw materials, and the raw materials should be used to avoid the waste.
1.3 when collecting all kinds of raw materials, we should pay attention to the quality of all materials, and materials that have obvious quality problems can not be collected.
1.4 after the raw materials are brought out of the warehouse, they are placed on the job site separately and marked on the raw materials to prevent mistakes.
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