What is an Assembly Line?

An assembly line, in English, is an assembly line, also known as an assembly line. An industrial production method means that each production unit only focuses on the work of a certain segment.

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Assembly line, English is Assembly line, also known as

1.Integrated production technology, can arrange a variety of stations on the assembly line to meet production needs;

2. High scalability, according to the needs of the factory, design the assembly line to meet the production needs of the product;

3. Save factory production costs, can save the number of production workers to a certain extent, achieve a certain degree of

1. High degree of professionalism in the workplace.

2. The process is closed, the work sites are arranged according to the process order, and the labor object moves unidirectionally between processes.

3. The processing time of each process is consistent with the proportion of the number of working places in each process.

4. Each process is produced at a uniform cycle. The so-called beat refers to the time interval between the production of two adjacent products.

1. According to whether the production object moves, it can be divided into fixed production line and mobile production line.

2. According to the number of varieties produced, it can be divided into a single variety production line and a multi-variate production line.

3. According to the degree of production continuity, it can be divided into continuous flow production line and intermittent flow production line.

4. According to the way to achieve the rhythm, it can be divided into a forced-batch production line and a free-batch production line.

5. According to the degree of mechanization, it can be divided into three production lines: manual, mechanized and automated.

Knowledge of assembly line equipment provides you with professional concepts and knowledge of assembly line equipment, production line equipment, assembly line equipment, as well as concepts and operating methods of assembly line related equipment, such as conveyor equipment, conveyor belts, etc., to facilitate your correct use and maintenance Assembly line equipment.

Features of double-speed and differential chain pipelines:

1. The chain assembly line uses the chain as the traction and carrier to convey materials. The chain can use ordinary sleeve roller conveyor chains, or other various special chains;

2. Large conveying capacity, can carry large loads;

3. The conveying speed is accurate and stable, which can ensure accurate synchronous conveying;

4. Easy to realize accumulation and transportation, can be used as assembly production line or as storage and transportation of materials;

5. Can work in a variety of harsh environments (high temperature, dust), reliable performance;

A. Made of special aluminum profile, easy to install;

B, beautiful structure, low practical noise;

C. Multifunctional and high degree of automation.

Production line

The characteristic of the production line is that each process is completed by a specific person and processed step by step. Everyone does a specific job.

The advantage is that it will be faster to produce, because everyone only needs to do one thing, and they are very familiar with what they do.

The disadvantage is that people who work can find it tedious.

Plate chain assembly line

Features: The product being carried is relatively heavy, and it runs synchronously with the production line to achieve product climbing; the production cycle is not fast; the chain plate is used as the load to achieve smooth product transportation.

Drum-type assembly line

Features: A wide range of products can be carried, with few restrictions. Used in conjunction with the stopper, it can achieve continuous, beat operation and accumulation of the product. The use of a lifting translation device can realize offline repair or inspection of the product without affecting it. The entire pipeline runs.

Belt line

Features: Lighter products, less shape restrictions; Synchronous operation with the production line can achieve product climbing and turning; Belts as carriers and transportation can achieve smooth product transportation with low noise; can achieve light materials or longer products Conveying distance.

Differential Conveying Line

Features: The differential conveying line adopts double-speed chain traction, the tooling board can be freely conveyed, and the stopper is positioned to allow the workpiece to move or stop freely. The workpiece can be automatically jacked at both ends and moved laterally. You can also install rotation (90 degrees, 180 degrees ...), special machines, testing equipment, robots and other devices on or near the wire body.

During the transportation of the assembly line products, they shall comply with the relevant regulations of the transportation department and shall not come into contact with acids and alkalis. The driving device and electrical equipment should avoid severe vibration and impact such as scratching, bumping and falling. During storage, rainproof and moistureproof measures shall be taken, and it shall be stored in a covered warehouse during storage.

Packaging line

Technical description: The packaging production line is divided into a lighted and fanned packaging production line and a lighted packaging production line. Generally, the lighted and fanned packaging production line is widely used and easy to operate. It is mainly used in some packaging workshops such as electronics factories, small hardware factories, and toy factories. Sitting, the middle is a work table with a conveyor belt. Improve production efficiency, greatly reduce labor, wages

Uses and characteristics: The packaging production line is composed of a hood-type adsorption corrugating machine, a paper carrier, a gluing machine, a double-sided machine, a paper cutter, a preheating roller, a double-layer bridge, and a glue making machine. Its characteristics are high degree of automation, convenient operation and maintenance, high production efficiency, good quality cardboard, compact structure and beautiful appearance.

Process of packaging production line:

1. Automatic packaging scale 2. Automatic bag supply machine 3. Bag clamping device 4. Folding and sewing machine 5. Heat sealing machine 6. Conveyor 7. Bag reversing machine 8. Metal Detector 9. Weight Detector 10. Remover 11. Vehicle-mounted Conveyor 12. Tilt Conveyor 13. Palletizer 13+ Robotic Palletizer 14. Automatic Control Cabinet

1: Is the pipeline always from left to right or right to left?

Generally, since most people are used to the right hand, the pipeline flows from left to right. However, due to the area limitation of some factories, at least one of the two or more pipelines may flow in opposite directions.

2: Is a U-shaped pipeline the most suitable?

Not necessarily, production line layout must be based on product characteristics and workmanship.

3: The faster the pipeline speed, the higher his productivity?

The level of production capacity should depend on the operating time of the bottleneck process and the fastest operating time of each station. If the production line speed is forced to increase, it will cause many problems.

4: Is the assembly line designed to ship products?

not quite. The ultimate goal is to achieve the "continuous value flow" of the product.

5: Why is the output low for a period of time when I just went to work or handed over?

It's a preparation stage, and it's a time period with many problems. So the management of the shift is very important. 6: Must the speed setting of the streamline be kept constant? Everyday?

It should be constant in the same product category. When different products are produced on the same line, the speed will change. At the same time, due to the problems of new employees, the line speed will be reduced.

7: Can I place only one product per Pitch mark?

Not necessarily, should focus on the pursuit of stable production flow

8: Is the faster processing speed of the pre-assembly better? Is it better to have more buffer stock?

No, it should be produced on demand. However, the pre-assembly processing speed can be slightly faster than the assembly speed.

9: The pipeline is easy to find the backlog, the kanban can show the progress, and the line manager urges the staff to do it quickly?

The first two are correct, but the third is not necessarily. It is not advisable to urge employees when the production cycle is normal. This will cause some unnecessary problems (such as urging employees to change their operating conditions, and the inspection is ignored. )

10: The line manager said that someone asked for leave and couldn't arrange the line, right? If you can't borrow someone, can you separate employees?

First of all, the assembly line cannot strictly complete all the subsequent operations without the cooperation and cooperation of one person. Because there are few people in one link, the output will decrease, but not many. In addition, where is the emergency response? Managers don't consider these common questions, so can he open a factory?

11: Who is more reasonable for employees to stand or sit?

Varies by product / condition / facility

12: Should the container on the streamline be dedicated or general? What is his scale?

Should be designed for the most common, not for general purpose.

13: How reasonable is the height and width of the streamline and the height and width of the machine?

According to the principle of ergonomics, the sitting table is 65 ~ 75CM high and the seat is 38 ~ 45; the standing table is 85 ~ 95CM, the seat is 58 ~ 62, and there are 20 ~ 30 boards for feet.

What is a one-piece assembly line?

Single-piece flow is also called unit synchronized flow. Single-piece flow is the comprehensive and effective use of personnel, equipment, and logistics. There is an organized, planned, and targeted schedule for each unit to balance production! In production activities, one batch is used as the production batch, and there is no stagnation between the front and back processes. Each process is self-inspected and one process is passed. The production method that passes one is called a stream production method, which is referred to as a single flow.

Features of one-piece assembly line

1. Target management: target production capacity, and industrial engineers will set target capacity for each unit (process) of the product;

2. Time management: Time is quantified. Industrial engineers will set the target operation time for each unit (process) of the product.

3. The finished product is produced quickly, the quality problem is responded quickly, and there are no batch quality accidents;

4. Push forward and pull back: It is different from the traditional production method. The traditional production method, the production line is passive, and can only wait for the materials, cutting, embroidery, and printing of the front department to determine the normal operation of the production, and it is produced in one piece Is in the initiative, the previous process must meet the production line, everything is determined for production. Forward push is not just forward push on the water, it includes order, material supply, and product reprocessing. Pull back is to meet the needs of customers by pulling the entire production and supply chain.

(1) Equipment operators must be proficient in the structure, performance, operation, and maintenance methods of various machinery, so that they can be used by specific personnel and responsible.

(2) When operating woodworking machinery, wear work clothes and fasten cuffs. Lesbians must wear work hats and braids in their hats; gloves and scarves are not allowed to operate.

(3) The machine must be tested before it starts to work, and all parts can start to work after running normally. Note: If the ignition is not successful once or twice; it is best to turn the burner fan on for a while to exhaust the gas in the furnace before the second test.

(4) Shafts, chains, pulleys, belts and other moving parts on the equipment shall be provided with protective covers and protective plates.

(5) If there is any abnormal condition or other failures during the operation of the machine, the power shall be cut off immediately and the machine shall be stopped for maintenance.

(6) The surroundings of the equipment are mostly flammable, and pyrotechnics should be strictly prohibited.

(7) When debugging and maintaining the equipment, the main power must be cut off.

(8) Please hurry to bring children to play on the assembly line.

The computer pipeline is the first time Intel has used the 486 chip. The assembly line works like an assembly line in industrial production. In the CPU, an instruction processing pipeline is composed of 5-6 circuit units with different functions, and then an X86 instruction is divided into 5-6 steps and then executed by these circuit units, so that one instruction can be completed in one CPU clock cycle. Therefore, the operation speed of the CPU is increased. Each integer pipeline of the classic Pentium is divided into four stages, that is, instruction prefetch, decode, execute, and write back the results, and the floating-point pipeline is divided into eight stages.

Computer pipeline technology is a key technology widely used in micro processing chips (CPU). Computer pipeline technology refers to a description of the execution of various instructions inside the CPU. To understand it, you must First understand the instructions and their execution.

Computer instructions

Computer instructions are a specific set of binary sets that tell the CPU what to do. If we compare the CPU to a processing plant, then an instruction is like an order, it triggers a series of actions of the CPU_processing plant, and finally gets the calculation result and the product. So how exactly do they work? First, there must be a department that receives orders-the instruction fetching mechanism of the CPU; second, there must be a shop that completes the order-the execution instruction mechanism of the CPU. In the factory, the product on an order is divided into many procedures, and the instructions are converted into many corresponding micro-operations in the CPU. After completing them in turn, the entire instruction is executed.

2.Execute instructions

In low-end CPUs, the execution of instructions is serial. Simply put, after executing one instruction, the next instruction is executed. It is like the processing factory we mentioned above had only a small workshop at the beginning of business. And the boss fighting alone, then, when he receives an order, he must be busy completing the first order, but not able to take the second order. In this way, receiving an order completing an order receiving an order ... fetching an instruction executing an instruction fetching an instruction ... is a serial process. Later, the boss found that it didn't take much time to accept the order, and he also had a helper who could work independently of each other. In this way, the boss would accept the next order while completing the last order. This is manifested in the fact that the instruction fetching mechanism and the execution instruction mechanism are separated on the CPU. From the perspective of the CPU as a whole, the CPU fetches the instructions in parallel while executing the last instruction. This is a qualitative leap in CPU technology, which makes the CPU change from serial work to parallel work, and thus has the prototype of the pipeline.

After the CPU completes the above step, the rest is how to improve the parallel processing capacity. The designers of the CPU were inspired by the assembly line of the processing plant and decomposed the execution of an instruction into many different ones. Process_microinstruction, which greatly simplifies the complexity of instructions, simplifies logic design, and improves speed. In a CPU with pipeline technology, just after the first instruction has executed the first "process", the second instruction is added to the pipeline and execution begins. Obviously, this pipeline technology requires multiple execution units, which are all implemented in X86 chips.

Through the introduction above, we have learned what pipeline technology is. Although this is not an innovation, it is a major hurdle in the implementation of the technology. It is a major contribution of CPU designers to the development of computers.

So, what's going on with the super pipeline of the P6 chip?

3.Introduction to P6's super pipeline

Super Pipeline is still a kind of pipeline technology in essence, but it has made the following improvements.

A. The number of lines has increased from two to three in Pentium, and eleven independent execution units are supported in parallel.

B. Out-of-order processing technology was adopted in the execution. That is, when an instruction requires some data and cannot be executed immediately, it will be removed from the pipeline and wait for data, and the CPU will immediately execute the next instruction. Waiting for rework makes sense. In this way, you can prevent an instruction from being executed and affect the efficiency of the entire pipeline.

C. In P6, the instructions are divided into more detailed stages, which simplifies the logical design, procedures, and so on, and increases the speed. In the 486 chip, an instruction is generally divided into five standard parts, as is Pentium. In P6, due to the use of RISC-like technology, an instruction was divided into a record fourteen stages. This greatly increases the speed of the pipeline.