Assembly: must be both fast and flexible

- Aug 28, 2018-

Streamline production line

Choosing the right assembly equipment is only part of the solution.For best results, long term planning of production capacity in production lines or factories has more advantages than simply increasing production per machine.It is advantageous to streamline the production line in a reasonable way, and in this manufacturing mode, the small production line has sufficient production capacity for a variety of special size specifications.This is sometimes referred to as a basic unit setting.It makes sense that many small production lines are made up of small production lines that reduce the likelihood that the entire plant will be affected by product changes.From a manufacturing point of view, it is the opposite of using a production line.In the case of one production line, the product is manufactured at high speed in a very short time, and then the conversion takes quite a long time. 

We can use smaller production lines to produce lower volume products without replacement, or to produce special, higher-volume products in parallel.One of its advantages is that it can replace only one production line while maintaining the normal production of other production lines, thus maintaining a high utilization rate.This approach wastes less time in switching products.From an investment perspective, the only downside of having several production lines is the need to add additional infrastructure, such as printing presses, conveyor belts and welding furnaces, to ensure a steady flow of products to each line.In between are modular platform lines that can be configured to accommodate large product and variety variations.This may require two, three or four pivoted platform mountings (they are very similar, but the production capacity may be different), and enough components are stored on the machine to provide different types of components.In this way, it is not necessary to replace the feeder or material tray to supply components when producing new products.This is the most typical highly flexible production line, which embodies the ability to handle the workload between various components and balance the machine.Such production lines are flexible, accurate, reliable and capable, but they are not very fast. 

Avoid slowing down

What causes the installation speed to slow down?The most obvious reason may be the size of the component.As the attachment head moves over the board, the larger the component, the greater the inertia and momentum. It is possible that the component moves over the suction mouth due to acceleration, deceleration, or change in direction.The same is true even after a component has been pasted onto a circuit board.Any slight movement of the multi-pin element with micro-spacing may result in no alignment between the pin and the pad and the circuit board becomes unusable after re-flow welding. 

The latest generation of horizontal mounting platform USES fixed worktable, which can provide us with a stronger guarantee that we can run at full speed under normal circumstances, and the maximum size of components can reach 30 x 30mm.The design of the equipment is only part of it.For example, a transversal frame driven at one end may cause a cantilever beam effect and may reduce mounting speed.This is because the mounting head needs time to stabilize between two moves to accurately attach the element after the oscillations stop.Therefore, it must be driven from both ends. 

Similarly, the mouth suction design is very exquisite.The larger suction nozzle is able to hold the larger QFP element as it moves between pickup and release motions.However, the suction nozzle cannot be used to pick up the 0201 elements.How many different types of nozzles are needed?More importantly, in terms of the type of components, what is the stick capacity of the patch head, and how much flexibility is there in selecting the suction nozzle? 

Head technology

The core of high speed and flexibility is the attached head itself.The linear pickup axis USES the swarm pickup technology, but it loses its usefulness when there are very small components in it, reducing its output by 25 percent.The rotary mounting head solves this problem and reduces the possibility of false picking - it combines the adaptability of the vertical turret mounting head to pick up small components reliably at high speed with the accuracy of the linear mounting head.The radial pasting head with multiple suction nozzles equipped with the z-axis drive mechanism is an economical, effective, fast and accurate solution, which can be pasted from small 0201 and 01005 elements to large micro-spacing QFP elements.

We must also determine the type of rotary attachment head.If changing the type of element also means changing the radial mounting head to fit with the element, the user must take full account of the amount of time it takes to recalibrate the mounting head, even if the calibration is not done on the machine.This means that many users do not replace the patch head, but use the non-optimal configuration to operate the machine or production line, which is bound to slow down the speed.As a result, there are bottlenecks in the production line, reducing the utilization of equipment.Another approach is to produce a system in which all mounting heads are able to pick up all types of components and control changes in the type of components through software.