模切行業經過幾年的爆發，行業對質量的要求越來越嚴格。 尺寸測量是模切生產啟動前必須采取的步驟。 那么如何選擇尺寸測量設備呢？ 在本期中，我們將討論如何選擇。

  模切產品會有尺寸公差，而影響公差的最根本原因就是模具。

  二是產品模切工藝的影響。 例如，一個產品需要模切兩次或更多次。 小孔本身位置有公差，立柱位置有公差。 對于特殊的石墨片模切，會有跳過步驟。 誤差，電眼跟蹤有公差，保護膜在切割過程中會產生壓痕（這可以通過使用相應的刀片角度來避免），生產過程中不同材料切割后的張力和收縮引起的誤差（這可以 由DOE測試，提前計算結果），可能的溢膠等，當影響公差時，我們應該如何管理和控制？

  控制尺寸的通用量具

  鋼尺、游標卡尺、千分尺、膠片尺、投影儀、影像測量儀、閃光測量儀。

  選擇合適的量具，可以看公差大小和測量方法，以平刀模為例。

  模具公差如下：

  1.塑料板模具公差±0.1mm

  2.蝕刻模具公差±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

  從模具公差來看，模切產品的最小公差為±0.03mm。 按照正常的測量精度要求，最佳設備精度小于產品尺寸公差要求的十分之一，最小模具公差為0.03mm。 一部分是0.003um，所以為了控制模切產品的尺寸，可以排除鋼尺和薄膜尺。

  模切產品屬于二維平面尺寸，由點、線、圓、弧、曲線（多個不同的R角弧）組成。

  1、要測量的大小和距離統計如下：

  點對點、點對線、點對圓（弧）、線對線、線對圓（弧）、圓（弧）對圓（弧）。

  二、要求的測量位置和形狀公差如下：

  角度、圓度、同心度、對稱度、平行度、點位坐標等

  游標卡尺、千分尺和投影儀可以測量點到點的距離。 如果需要確定兩條長線或圓（弧）的尺寸，它們無法準確測量，因此可以排除。 位置度和形狀公差的測量只能使用具有CAD功能的圖像測量儀和閃光測量儀。

  模切產品只能通過影像測量儀或閃光測量儀進行精確控制。 其中，影像測量儀分為自動和手動兩種。

  手動影像測量儀

  自動影像測量儀

  閃光測試儀

   手動影像測量儀和自動影像測量儀的精度為0.003mm。 差異反映在測量速度上。 產量不高，只需要達到尺寸和質量控制的效果。 手動圖像測量儀就足夠了。

  多高的生產量需要一臺自動影像測量儀？ 比如一個公司有4個以上的測量人員，有三四臺以上的手動測量儀器，沒有自動測量儀器。 這時可以考慮購買自動影像測量儀。

  自動影像測量儀的優點

  全自動影像測量儀采用CNC編程操作方式，只要產品尺寸確定，就可以編入程序，后續測量非常方便快捷。

  軟件自動判斷尺寸是否超差。 無需像手動圖像測量儀那樣測量一個數據對一個數據。 自動影像測量儀運行后，我們只需要檢查結果的顏色即可。 如果有紅色的NG，我們會注意的。

  數百甚至更多尺寸的復雜模切產品，使用手動圖像測量儀測量需要一兩個小時甚至更長的時間。 這種產品檢驗對測量人員來說是一個很大的考驗。 更氣人的是，一半的事故導致需要重新開始。

  對于形狀不規則的模切產品，其形狀是由多條圓弧和線條組成的開放或閉合曲線。 這時需要將產品外形的CAD圖導入軟件，自動影像測量儀會根據圖紙給出的外形曲線方向自動掃描實際曲線。 曲線，然后判斷。

自動化代替人工操作，可以節省大量人工，降低人員管理和培訓成本。 客戶還可以獲得工藝復雜、精度要求高的生產訂單，從而提升企業的競爭力和生產能力。

  閃光測試儀的優點是速度快，適合全檢，一個產品的測量時間是一秒。

  閃光測試儀有很多缺點，如：多層透明度、R角小、形狀不顯眼、寬度超過200mm等，都無法測量。 有一天你需要一個閃光測試儀，你必須把所有需要測量的產品帶到測試機器上。

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.