First article inspection reports
First piece inspection data
Receiving inspection data
In-process inspection data
Final inspection data
At Dalian Baichao, we are equipped to tackle the toughest metal fabrication challenges. We guarantee compliance to our quality manufacturing policy and your quality standards by fulfilling the following objectives:
Improve On Time Shipping rate to 92% or better
Maintain Customer Returns to below 0.55%
Quality Metal Fabrication
The proper measuring and inspecting of sheet metal before and after forming are key steps in sheet metal manufacture. Knowing the properties of the metal allow accurate setups and processes. Once the sheet metal products have been completed inspection of the finished product ensures quality control as well as good feedback for adjusting calculations.
We Have Tools To Do The Job
The micrometer acts on the basic principle that a threaded screw is attached to a thimble and spindle. As the thimble is turned the spindle is driven down against an anvil. The sheet metal being inspected is placed between the spindle and anvil. Each turn of the screw is precisely translated to the vertical movement of the spindle. Once the spindle, sheet metal and anvil are all in contact a small ratchet stop is used to turn the thimble until a standard torque is reached. The precise thickness of the sheet metal is now represented by the height and rotation of the thimble.
Using the vertical scale in combination with the rotation of the thimble scale a precise metal thickness is derived.
The use of a micrometer is preferable when inspecting sheet thickness because of the added decimal place. Material thickness will affect your bend operation more significantly than any other factor so it’s important to be as precise as possible when inspecting.
If a micrometer is not available, or the level of precision does not require a 4th decimal place then a caliper can be used to simplify the process of inspecting your incoming sheet metal. The caliper works on the basic principle of using either a veneer gauge or a rack and pinion gear driven dial to measure the distance between two jaws. The sheet metal is placed between the jaws and they are closed down with a consistent pressure. The resulting sheet thickness is represented either on the veneer or dial gauges. While they are typically slightly less precise than a micrometer calipers are often chosen because of their ease of use. Many types of digital calipers further simplify the inspection process.
Sheet metal protractors come in two basic styles, one is a basic protractor which is typically accurate to 1° and the other is the veneer type, which is usually accurate to .1°. Sheet metal fabrication is rarely required to be accurate to more than plus or minus 1° because most medium and light gauges can be moved the last degree or so by hand, meaning they won’t interfere with the finished product. However high tolerance bending of heavier gauges may require a higher level of accuracy.
Radius gauges are often used to inspect the bends of formed sheet metal.
These tools should be available in any production department and sheet metal operators all be trained in their uses.
Request a quote on your sheet metal fabrication project, or contact Dalian Baichao for solutions to your toughest manufacturing challenges.