What are the commonly used measuring tools in jewelry factories?
When the jewelry factory performs jewelry processing, it needs to use the detailed parameters of the product. At this time, it needs to use the measuring tools. Let the author introduce the jewelry measuring tools we commonly use.
A vernier caliper
For reading accuracy, the smaller the scale value on the ruler, the better, the scale is precise, and the width of the scale line needs to be thin. If you put straightedges with thicker scale values side-to-side together, there is a slight error between the lines that use them, and you can see it immediately. Vernier calipers use this feature, adding a scaled vernier ruler to the main ruler for reading.
Each division of the main ruler is 1mm. The vernier scale is 0.98mm per division. When in use, the main ruler is read as an integer, and the cursor is read as a decimal (<1mm), and the sum of the two is the actual size.
Second, the outer diameter of the micrometer
The outer micrometer is made by the principle of threaded transmission. When the thread is driven, the stroke in the axis direction is proportional to the point of rotation of the thread. The thread pitch is generally made 0.5mm, the circumference of the differential cylinder has 50 divisions, and the line rod moves axially by 0.01mm for each rotation of one division. When the micrometer is read, the scale axis is marked as an integer (>1mm), and a decimal is read on the differential cylinder, and the sum of the two is the actual scale.
Three, digital calipers
A digital caliper is a length measuring instrument that uses a capacitive grid (or grating, etc.) measurement system and a digital display for reading. It is mainly used to measure the outer and inner dimensions of stainless steel jewelry.
1—Inner measuring claw at knife edge; 2—foot frame; 3—braking screw; 4—display; 5—data output port; 6—foot body; 7—external measuring claw; Zero button; 10 - depth gauge.
Four, with watch calipers
The distance separated by the relative movement of the two measuring claws of the caliper, the integer part of the millimeter indication is indicated on the ruler, and the decimal part of the millimeter indication is indicated on the indication table. The watch caliper is used to measure the outer and inner dimensions of stainless steel jewelry.
1—ruler body; 2—inner measuring claw; 3—gear rack; 4—indicating table; 5—fastening screw; 6—ruler frame; 7—depth ruler; 8—roller handle; 9—dial locking screw; 10 - External measuring claw.
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