Large square box

Purpose:Cast iron platformSquare boxes are mainly used for inspecting and marking the parallelism, perpendicularity, and other aspects of components.

A square box is a hollow cube made of cast iron with six working faces, one of which has a V-shaped groove. The environmental conditions for square box calibration are normal temperature and humidity.

　　Customized cast iron parts1. Cast iron square boxes are mainly used for checking the parallelism and perpendicularity of components and supporting workpieces during marking,Testing PlatformGenerally, it is a cube or rectangular prism with the same side length, and various specifications and equal height square boxes and rectangular tubes can be made according to user requirements.

2. Cast iron square box: manufactured according to JB/T3411.56-99 standard, material HT200.

3. Accuracy:Cast iron platformFor scraping and developing square boxes, in addition to checking the flatness, the contact spots should also be checked using the coloring method. The number of spots in any square with a side length of 25mm is: 1, 2, not less than 25 points; 3 not less than 20 o'clock.

4. Inspection method for cast iron square boxes: For square boxes with a side length of 300mm or less, 1mm measuring blocks should be placed at each end of the inspected surface during inspection,cast iron surface platePlace the blade ruler on the working surface of the measuring block to determine the flatness of the inspected surface