Design of the guiding device of the hottest die

2022-08-19
  • Detail

Design of die guide device

the guide device of extrusion die includes guide plate, sleeve, guide post and guide sleeve. Extrusion parts with high accuracy requirements shall be guided by guide posts and guide sleeves

guide post guide sleeve extrusion die is widely used. Generally, the guide sleeve is pressed into the upper base plate with a press fit (Figure). The cooperation relationship adopts or. For the extrusion die with large stress, in order to fasten the guide post and guide sleeve, the pressing plate screws are used to fix the guide post and guide sleeve on the upper and lower base plates, as shown in the figure. The guide post, guide sleeve and base plate are matched by base hole system. There are two structural types of guide post and guide sleeve:

(1) sliding guide post guide sleeve: there are oil grooves in the guide post or guide sleeve of this guide device to maintain good lubrication (Fig. The inner hole D1 of the guide sleeve is matched with the guide post, which adopts or slides

the length L1 of the guide sleeve pressed into the upper base plate and the diameter D of the guide sleeve shall not be less than 1.5 times the diameter D of the guide column, and the guide length of the guide sleeve shall be 2 ~ 3 times the diameter of the guide column

the diameter D of the guide post can be determined according to the mold structure, the strength and stiffness of the guide post. Generally, the diameter D of the guide post is 30 (mm). The length L of the guide column pressed into the lower base plate shall not be less than 1.5 times the diameter D. the total length L of the guide column shall be determined according to the closing height of the die, but it shall be ensured that the guide column extends into the guide sleeve more than 15 (mm) before the punch enters the female die, otherwise it will not play a guiding role

figure fasten the guide post and guide sleeve with pressing plate

(2) rolling guide post guide sleeve the guide sleeve of this guide device is equipped with a steel ball retaining ring to ensure accurate guidance. The inner hole D1 of the steel ball retaining ring in the guide sleeve is matched with the guide post, and the matching is adopted (refer to stamping design Jinan new era Gold Testing Instrument Co., Ltd. to escort your work, page 455 ~ 458)

the length L1 of the guide sleeve pressed into the upper bottom analysis and the outer diameter D of the guide sleeve shall not be less than 2 times the diameter D of the guide column, and the guide length of the guide sleeve shall be 3 ~ 4 times the diameter of the guide column

the diameter D of the guide post shall be determined according to the strength and stiffness. Generally, D is 30 (mm), and the length L of the guide post pressed into the lower base plate shall not be less than twice the diameter D

the pressure welding surface of the three test pieces is at the zigzag central point

the material and heat of the guide post and guide sleeve make it difficult to distinguish the bending point. Hardness:

because the guide post and guide sleeve work under the condition of rubbing each other on the surface of the test piece, the mating surface is required to be hard and wear-resistant. For quenching dies used for general extrusion parts, the guide post and guide sleeve can be carburized with 20Cr steel and 25 steel. The carburized layer depth is 0.6 ~ 1.2 (mm), the quenching hardness hrc=58 ~ 62, and the surface roughness is 0.2

rolling guide post and guide sleeve are used for molds requiring high guiding accuracy. They are made of grcr15, with quenching hardness hrc=60 ~ 64, and LY3 aluminum alloy is used for steel ball retaining ring. The surface roughness of guide post, guide sleeve and steel ball is less than 0.2

Copyright © 2011 JIN SHI