SMT对贴片机的基本要求可以用3句话归纳:一要贴得准,二要贴得好,三要贴得快

　　(1)贴得准

　　贴得准包含以下两层意思。

　　①元件正确:要求各装配方位元器材的类型、类型、标称值和极性等特征标记要契合产品的装配图和明细表要求,不能贴错方位。

　　②方位精确:元器材的端头或引线均和政策图形要在方位和角度上尽量对齐、居中。现在贴装的对中政策除传统的PCB上焊盘图形外,还有以实践印刷的焊膏图形为依据。

　　(2)贴得好

　　贴得好包含以下3层意思。

　　①不损伤元件:拾取和贴装时因为供料器、元器材、印制板的误差以及z轴操控的缺点等都或许形成元器材的损伤,导致贴装失效。

　　②压力(贴片高度)合适:贴片压力(高度)要合适,贴片压力过小,元器材焊端或引脚浮在焊膏外表,焊膏粘不住元器材,在传递和回流焊时简单发生方位移动;贴片压力过大,焊膏挤出量过多,简单形成焊膏粘连,回流焊时容易粘接:压力太大甚至会损坏元器材。

　　③确保贴装率:因为贴片机参数调整不合理或元器材贴装功能不良及供料器和吸嘴缺点都会导致贴装过程中元器材掉落,这种现象称为“掉片”或“抛料”。在实践出产中,用“贴装率”来衡量,当贴装率低于预订水平,必须查看原因。

　　(3)贴得快

　　一般一块电路板上有数十到上千个元件,这些元件都是一个一个贴上去的,贴装速度是出产功率(产能)的基本要求。贴装速度首要取决于贴片机的速度,一起也与贴装工艺的优化、设备的使用和办理紧密相关。

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　　The basic requirements of SMT for the placement machine can be summarized in 3 sentences: one must be accurate, two must be posted well, and three must be posted quickly

　　(1) Paste accurately

　　Sticking properly contains the following two meanings.

　　①The components are correct: the type, type, nominal value and polarity of each assembly orientation equipment are required to conform to the requirements of the product assembly drawing and schedule, and the wrong orientation must not be pasted.

　　②Accurate orientation: The ends or leads of the equipment and the policy graphics should be aligned and centered as far as possible in the orientation and angle. In addition to the traditional land patterns on the PCB, the current mounting centering policy is based on the solder paste patterns printed in practice.

　　(2) posted well

　　Posting well includes the following 3 meanings.

　　① No damage to the components: due to the errors of the feeder, the component, the printed board and the shortcomings of the z-axis control during picking and placement, the damage of the component may result in the failure of the placement.

　　②The pressure (patch height) is appropriate: the pressure (height) of the patch should be appropriate, the pressure of the patch is too small, the solder end or pin of the element device is floating on the surface of the solder paste, and the solder paste cannot stick to the element device, and it is transferred and reflowed. Orientation movement simply occurs when the patch pressure is too high, the solder paste is squeezed out too much, and the solder paste adhesion is simply formed. It is easy to bond during reflow soldering: too much pressure can even damage the components.

　　③Ensure the placement rate: because of unreasonable adjustment of the placement machine parameters, poor placement of the meta equipment and the defects of the feeder and the nozzle, the meta equipment will fall during the placement process. This phenomenon is called "dropping" or "Throwing materials". In actual production, the "mounting rate" is used to measure. When the mounting rate is lower than the booked level, the reason must be checked.

　　(3) Post fast

　　Generally, there are dozens to thousands of components on a circuit board, and these components are attached one by one. The mounting speed is the basic requirement of the production power (capacity). The placement speed mainly depends on the speed of the placement machine, and it is also closely related to the optimization of the placement process, the use and management of the equipment.

　　The above content is organized and provided by Wenling Huayu Production Line Manufacturing Plant. Huayu production line is a professional production, design, installation, commissioning, transportation and maintenance line equipment enterprise. Since the establishment of the factory 26 years ago, with the advanced modern production management system and continuous product innovation, a complete set of suspended object conveyor lines, various belt conveyor lines, coating lines, plate chain lines, complete machine lines, cleaning lines, and automated combinations have been manufactured. Assemble production equipment, storage and other product series. Products are widely used in automobiles, motorcycles, electric bicycles and accessories, washing machines, gasoline engines, sewing machines, motors, instruments, household appliances, computers, color TVs, air conditioners, refrigerators, washing machines, cooking utensils, energy-saving machines, cosmetics, Various assembly and production of electronic industries such as communications, transportation, water pumps, food plastic products, etc., improve production efficiency and reduce labor costs for enterprises. Warmly welcome new and old customers to visit the factory and discuss cooperation!