How to improve the production efficiency of the assembly line

An assembly line is also known as assembly line an industrial production method, refers to each production unit only focus on processing a certain segment of the work, in order to improve efficiency and yield; according to the assembly line conveyor can be divided into: the belt assembly line, plate chain line, times the speed chain, plug-in line, mesh belt line, suspension line and roller assembly line of these seven types of assembly line. Generally include traction parts, load-bearing components, driving devices, tightening devices, redirection devices and support parts and other components. The assembly line is highly scalable, can be designed according to the demand for conveying capacity, conveying speed, assembly stations, auxiliary components (including quick connectors, fans, lights, sockets, process boards, shelves, 24V power supply, wind batch, etc., and is therefore widely welcomed by the enterprise; the assembly line is an effective combination of people and machines, the most fully reflect the flexibility of the equipment, which will be the conveyor system, fixtures and fixtures and on-line machine, testing equipment, the combination of organic In order to meet the requirements of multi-species product transportation. Conveyor line transmission mode has synchronous transmission / (mandatory), can also be non-synchronous transmission / (flexible), according to the configuration of the choice, can achieve the requirements of the assembly and conveyor. Conveyor lines are indispensable in the mass production of enterprises . The assembly line plays an important role in industrial production, optimization of the assembly line is directly related to the quality of the product and the efficiency of production, so it has become a topic that enterprises have to pay attention to. 1, optimization of the assembly line the first station of the operating time, and how long to put a board, which is to meet the production plan of the amount of time necessary to put into cycle. But in reality, the bottleneck station's operating time is necessarily greater than the first station, the first station must not be the bottleneck station, so the first station may not be completely in accordance with the requirements of the cycle time to input, because the bottleneck station has slowed down his speed, so from the management point of view, we must indeed require the first station operators in accordance with the required speed input. The conveyor belt speed of the assembly line can also be deduced from the daily output, the following formula for the speed of the conveyor belt: conveyor belt pitch time = the whole day's work time / daily output * (1 + defective rate) Conveyor Belt Speed = Marking Interval Distance / Conveyor Belt Pitch Time The so-called Marking Interval Distance, in the assembly line of the belt to do the marking of the distance between, hope that the operator in accordance with the speed of the marking of the flow through the finished The operator is expected to complete the work according to the speed at which the marks flow and place them on the belt line; however, the refining line is not marked, so the length of the board is used as the distance between marks. Why conveyor belts? In addition to transporting goods, there is a semi-mandatory operator to complete the operation according to the plan function, but not just speed up to try, but should be calculated according to the above formula to find. 2, observe the assembly line which is the bottleneck station: (1) always busy station; (2) always pull the board back station; (3) from the station, the original piece of a piece of boards, there is a gap in the middle. The above three points can be seen visually, and the operation time is the longest among all stations when measured with a stopwatch. Bottleneck station's operating time becomes the whole assembly line actual output cycle time, and the daily output formula is as follows: daily output = real whole day's work time / inter-cycle time, so the site cadres as long as to reduce their operating time, can significantly improve the output, such as parts to take some to other stations to do, the use of tools to save action to save, improve the configuration of the work area and so on. But after solving the bottleneck station, there may be new bottleneck station, so it is necessary to improve the new bottleneck station, so continue to focus on the bottleneck station to improve, the efficiency of the entire assembly line will improve day by day. 3, observe the last station of the assembly line to collect the board cycle time, that is, the actual output of the cycle time, the cycle time of this station must be equal to the bottleneck station. From this station can be deduced from the efficiency of this assembly line line, the formula is as follows: efficiency = input cycle time / actual cycle time = the first station of the operating time / the last station of the operating time of course, can also be used to calculate the operating time of the bottleneck station, but the observation of the last station is always simpler and more practical. In the assembly line is equal to the number of work in progress: ( the last station of the operating time - the first station of the operating time ) * ( the whole day's work time / the last station of the operating time ) 4, crop rate of observation crop rate = in the operation of the time / the whole day's work time is the so-called crop is the effective work on the assembly line, the operator sits in the seat does not mean that he has in the work, there is a work in order to make the product, so to observe the operator's time in the operation. Therefore, it is necessary to observe the working time of the operator. But in practice, it is not possible to measure each operator throughout the day, so there is a kind of work sampling techniques to simulate the measurement, in fact, to put it bluntly is to see from time to time to see what the operator is doing. 5, the assembly line operator sits on the seat does not mean that he has to work seriously in the work, so the last thing is to observe each operator's operating speed, speed is a very abstract concept, it is difficult to compare and quantify the speed just from the visual, so the speed is a standardized speed in the mind. Establish a standard speed in mind, faster than it is considered good, action streamlined, fixed and rhythmic, often have a better operating speed, and the opposite is not good, so it is relatively simple to observe. Assembly line operation is not fast is good, its action must be added value, so also look at its action is simple and concise, so the concept of the principle of economic action required, in simple terms, human hand movements can be divided into moving, holding, release, front, organization, use, decomposition, and a psychological mental role, of which, strictly speaking, only two kinds of action has added value: organization, use, so the Under the condition of meeting the production requirements, try to exclude or simplify other actions. The principles are as follows: 1, move: so that the material automatically to the desired location, shorten the distance to move, reduce the weight of the items to be moved, move around the path to avoid things that will impede the movement, so that the box is placed diagonally in order to shorten the distance around the edges, etc. 2, holding: the material in the box as neatly as possible, do not pile up, not convenient to pick up the things can be reserved for the first holding space, etc. 3, the front: the same as the holding The same as holding, the material in the box can be discharged as neatly as possible, do not messy accumulation, etc. 4, set up: to cure the tool instead of hand work, etc. 5, use: to make the machinery fully automated, etc. 6, the role of the spirit: the use of machinery to replace human judgment, reduce the operator's eyes move, etc. Assembly line installation considerations: the assembly line should ensure that the plane design of the shortest route of transportation of parts, production workers to operate conveniently, auxiliary services to facilitate the work of the department, the most effective use of the production area, and to consider the interconnection between the assembly line installation. In order to meet these requirements, in the assembly line layout should be considered in the form of assembly line, assembly line installation workplace arrangement method and other issues. Assembly line installation workplace arrangement should be consistent with the process route, when the process has more than two workplace, to consider the same process workplace arrangement. Generally when there are two or more than two even number of the same kind of workplace, to consider the use of double row arrangement, they will be divided into two cases in the transportation route. However, when a worker to look after more than one piece of equipment, to consider making the worker move the shortest possible distance.