模切行业经过几年的爆发，行业对质量的要求越来越严格。 尺寸测量是模切生产启动前必须采取的步骤。 那么如何选择尺寸测量设备呢？ 在本期中，我们将讨论如何选择。
模切产品会有尺寸公差，而影响公差的最根本原因就是模具。
二是产品模切工艺的影响。 例如，一个产品需要模切两次或更多次。 小孔本身位置有公差，立柱位置有公差。 对于特殊的石墨片模切，会有跳过步骤。 误差，电眼跟踪有公差，保护膜在切割过程中会产生压痕（这可以通过使用相应的刀片角度来避免），生产过程中不同材料切割后的张力和收缩引起的误差（这可以 由DOE测试，提前计算结果），可能的溢胶等，当影响公差时，我们应该如何管理和控制？
控制尺寸的通用量具
钢尺、游标卡尺、千分尺、胶片尺、投影仪、影像测量仪、闪光测量仪。
选择合适的量具，可以看公差大小和测量方法，以平刀模为例。
模具公差如下：
1.塑料板模具公差±0.1mm
2.蚀刻模具公差±0.03mm
3.雕刻模具公差±0.03mm
4.五金模具公差±0.1mm
5. QDC模具公差±0.05mm
从模具公差来看，模切产品的最小公差为±0.03mm。 按照正常的测量精度要求，最佳设备精度小于产品尺寸公差要求的十分之一，最小模具公差为0.03mm。 一部分是0.003um，所以为了控制模切产品的尺寸，可以排除钢尺和薄膜尺。
模切产品属于二维平面尺寸，由点、线、圆、弧、曲线（多个不同的R角弧）组成。
1、要测量的大小和距离统计如下：
点对点、点对线、点对圆（弧）、线对线、线对圆（弧）、圆（弧）对圆（弧）。
二、要求的测量位置和形状公差如下：
角度、圆度、同心度、对称度、平行度、点位坐标等
游标卡尺、千分尺和投影仪可以测量点到点的距离。 如果需要确定两条长线或圆（弧）的尺寸，它们无法准确测量，因此可以排除。 位置度和形状公差的测量只能使用具有CAD功能的图像测量仪和闪光测量仪。
模切产品只能通过影像测量仪或闪光测量仪进行精确控制。 其中，影像测量仪分为自动和手动两种。
闪光测试仪
手动影像测量仪和自动影像测量仪的精度为0.003mm。 差异反映在测量速度上。 产量不高，只需要达到尺寸和质量控制的效果。 手动图像测量仪就足够了。
多高的生产量需要一台自动影像测量仪？ 比如一个公司有4个以上的测量人员，有三四台以上的手动测量仪器，没有自动测量仪器。 这时可以考虑购买自动影像测量仪。
自动影像测量仪的优点
全自动影像测量仪采用CNC编程操作方式，只要产品尺寸确定，就可以编入程序，后续测量非常方便快捷。
软件自动判断尺寸是否超差。 无需像手动图像测量仪那样测量一个数据对一个数据。 自动影像测量仪运行后，我们只需要检查结果的颜色即可。 如果有红色的NG，我们会注意的。
数百甚至更多尺寸的复杂模切产品，使用手动图像测量仪测量需要一两个小时甚至更长的时间。 这种产品检验对测量人员来说是一个很大的考验。 更气人的是，一半的事故导致需要重新开始。
对于形状不规则的模切产品，其形状是由多条圆弧和线条组成的开放或闭合曲线。 这时需要将产品外形的CAD图导入软件，自动影像测量仪会根据图纸给出的外形曲线方向自动扫描实际曲线。 曲线，然后判断。
自动化代替人工操作，可以节省大量人工，降低人员管理和培训成本。 客户还可以获得工艺复杂、精度要求高的生产订单，从而提升企业的竞争力和生产能力。
闪光测试仪的优点是速度快，适合全检，一个产品的测量时间是一秒。
闪光测试仪有很多缺点，如：多层透明度、R角小、形状不显眼、宽度超过200mm等，都无法测量。 有一天你需要一个闪光测试仪，你必须把所有需要测量的产品带到测试机器上。
Die-cutting industry after several years of outbreak, the quality of the industry is becoming more and more stringent. Dimensional measurement is a necessary step before die - cutting production starts. So how to choose the size measuring equipment? In this issue, we'll discuss how to choose.
Die-cutting products will have dimensional tolerance, and the most fundamental cause of tolerance is the mold.
The second is the impact of product die cutting technology. For example, a product may need to be die-cut two or more times. The position of the hole itself has tolerances, and the position of the column has tolerances. For special graphite die cutting, there will be skipping steps. Error, electric eye tracking have tolerance, protective film produces in the process of cutting indentation (this can be achieved by using the corresponding blade Angle to avoid), the production process of the tension and the shrinkage caused by the different material after cutting error (this can be caused by DOE test, the calculation results in advance), may be the glue, etc., when the influence of tolerance, we should how to manage and control?
A universal gauge for controlling dimensions
Steel ruler, vernier caliper, micrometer, film ruler, projector, image measuring instrument, flash measuring instrument.
Choose the right measuring tools, you can see the tolerance size and measurement method, take flat die as an example.
Mould tolerances are as follows:
1. Plastic plate mold tolerance ±0.1mm
2. Etching mold tolerance ±0.03mm
3. Engraving mold tolerance ±0.03mm
4 hardware mold tolerance ±0.1mm
5. QDC mold tolerance ±0.05mm
From the perspective of mold tolerance, the minimum tolerance of die-cutting products is ±0.03mm. According to the normal measurement accuracy requirements, the best equipment accuracy is less than one tenth of the product size tolerance requirements, the minimum mold tolerance is 0.03mm. One part is 0.003um, so in order to control the size of die cutting products, steel ruler and film ruler can be excluded.
Die-cutting products belong to the two-dimensional plane size, by point, line, circle, arc, curve (a number of different R Angle arc) composition.
1. The size and distance statistics to be measured are as follows:
Point-to-point, point-to-line, point-to-circle (arc), line-to-line, line-to-circle (arc), circle (arc) to circle (arc).
Two, the required measurement position and shape tolerance is as follows:
Angle, roundness, concentricity, symmetry, parallelism, point coordinates, etc
Vernier calipers, micrometers and projectors measure point-to-point distances. If the dimensions of two long lines or circles (arcs) need to be determined, they cannot be measured accurately and can therefore be excluded. The measurement of position and shape tolerance can only be done with CAD image measuring instrument and flash measuring instrument.
Die - cutting products can only be accurately controlled by image measuring instrument or flash measuring instrument. Among them, the image measuring instrument is divided into automatic and manual.
Manual image measuring instrument
Automatic image measuring instrument
Flash tester
The accuracy of manual and automatic image measuring instruments is 0.003mm. The difference is reflected in the speed of measurement. The output is not high, only need to achieve size and quality control effect. A manual image meter is sufficient.
What level of production is required for an automatic image measuring instrument? For example, a company has more than 4 measuring personnel, there are more than three or four manual measuring instruments, no automatic measuring instruments. Consider buying an automatic image measuring instrument.
Advantages of automatic image measuring instrument
Automatic image measuring instrument adopts CNC programming operation mode, as long as the product size is determined, it can be programmed into the program, the follow-up measurement is very convenient and fast.
Software automatically determines whether the size is out of tolerance. No need to measure data against data like a manual image meter. After the automatic image measuring instrument runs, we only need to check the color of the result. If there's a red NG, we'll pay attention.
Complex die-cutting products of hundreds or even more sizes can take one or two hours or even longer to measure with a manual image measuring instrument. This product inspection is a big test for the surveyor. Even more infuriating, half of all accidents result in a need to start over.
For irregular shape die cutting products, its shape is composed of a number of arcs and lines of open or closed curve. At this time, it is necessary to import the CAD diagram of the product shape into the software, and the automatic image measuring instrument will automatically scan the actual curve according to the shape curve direction given by the drawings. Curve, and then judge.
Automation instead of manual operation, can save a lot of labor, reduce personnel management and training costs. Customers can also obtain production orders with complex processes and high precision requirements, thus improving the competitiveness and production capacity of enterprises.
The advantages of flash tester are fast, suitable for full inspection, the measurement time of a product is one second.
Flash tester has many disadvantages, such as: multi-layer transparency, R Angle is small, the shape is not conspicuous, width more than 200mm, etc., can not be measured. One day you need a flash tester, and you have to bring all the products you need to measure to the test machine.
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