Hardware knowledge base: "guide column"

The guide post is a guide element used in the mold and the assembly to ensure that the mold guides the stroke of the mold with a precise positioning.

The material of the guide pillar is generally selected from bearing steel, hot die steel, and easy-car iron. The use of bearing steel SUJ2 is relatively large, so that the durability and interchangeability of the guide pillar in guiding performance are greatly enhanced. The guide pillars and components form an outer guide pillar assembly and an inner guide pillar assembly with a beautiful metallic luster.

Guide column heat treatment: HRC58-62; guide column surface roughness: Ra0.8, Ra1.6

The guide posts are generally cylindrical with shoulders, and generally have oil grooves. The number of oil grooves increases as the length of the guide columns increases, and the maximum number of oil grooves is generally eight.

Calculation of the Length of C Segment of Inclined Column

The length of the C section of the inclined guide column is very important. Its length controls the distance S that the slider runs. The calculation of the length of the oblique guide column is actually using the "trigonometric function". We can simplify it into a triangle to facilitate the use of "trigonometric" calculations. The setting S is the slider sliding distance S in the figure, and the angle X is the angle D in the figure. (These two numbers have been set to fixed values ​​according to the needs of the product and mold design and are known numbers.) The length L is relative to C in the above figure. Height H is the distance that the mold opens when the slider slides to the specified position. The values ​​thus calculated are only in an idealized state, and actually the gap between the slider and the inclined column, and the roundness above them, must be taken into consideration. However, computer-aided design software such as AutoCAD is now so advanced that it completely liberates people from the complicated calculation formulas. As long as some simple commands are used or some faster ones are used, the required obliqueness can be drawn. The pillars, which can also be used to derive their length, can also simulate their state after the mold has been opened. No manual calculation of these data.

Determining the Angle of Inclined Column in Mold

The angle of the inclined guide column of the mold is usually 20 degrees or 25 degrees. Generally, the angle is 20 degrees. If the distance moved by the slider is a bit long, 25 degrees can be used. If the distance is longer, use hydraulic or pneumatic methods.

The function of the center hole of the guide column

The roundness of the guide post is very demanding, and the center hole is mainly used to grind the outer diameter by using a cylindrical grinding machine, because when using the cylindrical grinding machine to grind the outer diameter, the guide column must be rotated by the top against the center hole. Can be ground.