The difference between magnetic square box and marked square box

The purpose of magnetic square box: used in industrial production for detecting the parallelism and perpendicularity of parts, magnetic square box can also be marked according to the test results in essential positions, is an essential test tool in measurement. And has: extreme precision, not easy to alter, wear resistance and other advantages. Can maintain stability under heavy load and general temperature.

​Typically, the service life of a magnetic square box is extremely lengthy. As long as the correct method is used and protected, the accuracy of wholasale magnetic box working face can be maintained for more than 2 years. When the accuracy of the square box is reduced, it can be recovered by debugging or scraping process. In the process of using the square box, attention should be paid to not to use and store in the humid, corrosive, too high and too low temperature environment, so as to prolong the service life of the square box and ensure the quality of work. There will be some errors between the drawing design and the actual appearance of the additional box, such as the diagonal of the length, width and height of the square box, which are typically between ±0.02 (a or b).

The marking box is mainly used for the inspection and marking of the parallelism and perpendicularity of the parts. Square boxes are made of cast iron or steel.

Measuring tools produced by the line square box cavity cube, one of the working surfaces has a V-shaped slot. Environmental conditions for verification of square boxes: normal temperature, normal humidity.

The main requirements are that the working face of the scribing box should not have rust, scratches, cracks, dents and other defects that affect the measurement performance. ​No - working face should be sand - cleaning paint, edge chamfering.

Precision of marked square box: In addition to verifying flatness, coloring should be used in verifying contact spots of scraped square box.

The number of spots in any square with a side length of 25mm shall be no less than 25 in grade 1 and grade 2; ​level 3 not less than 20 points

The same crossed square box is extremely close. The difference is that the magnetic box V slot part and the bottom are with magnetic force, so that the measured workpiece can be firmly fixed on the box, easy to use; ​at the same time, it also considerably reduces the instability of the workpiece, or negligence in the operation process, so that the workpiece slips and hurts the staff.

Technical requirements of magnetic square box: The working face should not have sand holes, pores, cracks, slag inclusion, shrinkage, scratches, bumps, rust points and other defects that gravely affect the appearance and performance, otherwise the measurement will be inaccurate.

Therefore, manufacturers should choose square boxes according to their actual conditions.

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