Cast iron square boxes are primarily used for inspecting parallelism and perpendicularity of parts and supporting workpieces during marking. They are usually cubes or rectangular prisms with equal side lengths, and can be custom-made in various sizes and heights as well as rectangular cylinders according to customer requirements. 　　

Cast Iron Square Box: As perJB/T3411.56-99Standard manufacturing, materialsHT200。 

Cast Iron Square Box Purpose: Square boxes are mainly used for checking parallelism, perpendicularity, and marking of parts. The square boxes are made of cast iron.6A hollow cube with one working faceVType slots. Environmental conditions for the square box calibration: normal temperature, normal humidity. The square box is mainly used for the inspection and marking of parallelism, perpendicularity, and other aspects of parts. The square box is made of cast iron or steel.6A hollow cuboid with one work surfaceVMolded slots.

Cast Iron Square Box Requirements: All working surfaces of the square box must be free of rust, scratches, cracks, dents, and any other defects that may affect the measuring performance. Non-working surfaces should be sandblasted and painted, with corners chamfered. A label should be affixed to the inner wall of the square box, indicating the specifications, size, grade, factory serial number, and manufacturer's name.

Cast iron square boxes are mainly used for inspecting the parallelism and perpendicularity of parts and supporting workpieces during marking. They are typically made of cubes or rectangular prisms with equal side lengths. Customized sizes and equal-height square boxes as well as rectangular cylinders can be produced according to customer requirements.

Cast iron square box requirements: All working surfaces of the square box must be free from rust, scratches, cracks, dents, and any other defects that may affect the measuring performance.

Cast Iron Square Box Precision: In addition to checking the flatness of the square box for scraping and trimming, the contact spots are also inspected using the dye method. For side lengths of25mmNumber of spots within any square:1Grade2Grade not less than25Dot3Grade not less than20Dot.

Cast Iron Square Box Usage Precautions:

1Before using the cast iron square box, clean it with pure gasoline, wipe it clean with a cheesecloth, and check for any rust, scratches, cracks, dings, dents, sand holes, and impurities on all working surfaces to prevent affecting measurement accuracy.

2After use, cast iron square boxes should be cleaned and wiped dry, then coated with rust-proof paint.

3The working surfaces of the cast iron square box have been machined to maintain mutual perpendicularity and parallelism. Therefore, the square box is mainly used for securing and locating workpieces, providing auxiliary reference planes perpendicular to the datum surface for the workpieces being measured. By flipping it, the measured dimensions become perpendicular to the platform (flat surface) working surface, enabling platform measurement. Therefore, when in use, the square box should be placed on a clean platform (flat surface), along with the guiding rails and other reference planes.

Cast Iron Square Box Precision: In addition to checking the flatness of the square box for scraping, the contact spots are also checked using the colorant method. For a side length of25mmNumber of spots within any square:1Grade2Grade not less than25Dot3Grade not less than20Dot.

Cast Iron Square Box Inspection Method: For a side length of300mmAnd below, during the inspection, place at the ends of the rectangular box face being inspected.1mmThe gauge blocks, place the blade gauge on the working surface of the gauge block, then test fit them at each inspection point. The difference in size between the gauge block group just inserted and the size of the end gauge blocks is the deviation of the inspected point between the ends. This inspection should also be carried out on several cross-sections of the longitudinal, transverse, and diagonal directions of the square box working surface. Take the value when the direction of the straight line errors at each position is consistent; when the direction of the errors is inconsistent, take the sum of the positive and negative error values, which represents the planarity of the inspected surface plane.

Manufacturing of cast iron square boxes:

1Please provide the Chinese content you would like translated into American English.   Standard accuracy acceptance, accompanied by relevant qualification certificates.

2Comprehensive after-sales service with one-on-one support and purchasing assistance.

3For manufacturers   Is sexual.

4The selected materials and technology (such as surface treatment for cast iron square boxes requiring manual scraping and polishing).