This part specifies the dimensions and tolerances of straight guide bushings for die casting moulds. This part is applicable to straight guide bushings for die casting moulds. This part also gives material guidelines and hardness requirements, and specifies the marking of straight guide bushings. GB/T 4678.7-2003 Die casting mould parts Part 7: Straight guide bushings GB/T4678.7-2003 Standard download decompression password: www.bzxz.net

GB/T4678 "Die-casting die parts" is divided into 19 parts: Part 1: Templates; Part 2: Round inserts; Part 3: Rectangular inserts; Part 4: Shouldered guide pins; Part 5: Headed guide pins; Part 6: Headed guide bushings; Part 7: Straight guide bushings; Part 8: Push plates; Part 9: Push plate guide pins; tt||Part 10: Push plate guide bushing;
-Part 11: Push rod;
Part 12: Reset rod;
Part 13: Push plate washer;
Part 14: Stop pin;
Part 15: Cushion;
Part 16: Flat push rod;
Part 17: Push tube;
Part 18: Support column;
Part 19: Positioning element.
This part is Part 7 of GB/T4678.
This part replaces GB/T4678.7--1984 "B-type guide bushings for die casting parts". The main changes of this part compared with GB/T4678.7-1984 are as follows: The standard name is changed to straight guide bushing.
GB/T 4678.7-—2003
Making major changes in the arrangement of the mark, adding "Foreword", "Scope" and "Normative Reference Documents", and specifying the content of the mark.
- Modified the size specification series, added the large size specification series. The material was changed to recommended selection.
Modified the geometric tolerance requirements.
- Added the guide sleeve lead-in end size requirements. Surface roughness replaced the smoothness in the original standard. This part was proposed by the China Electrical Equipment Industry Association. This part is under the jurisdiction of the National Technical Committee for Mold Standardization (SAC/TC33). Drafting units of this part: Shanghai Pierburg Nonferrous Parts Co., Ltd., Guangzhou Cavity Mold Factory, Guilin Electrical Science Research Institute, Dongfeng Technology Automobile Braking System Company, Chengdu Xingguang Die Casting Industry Co., Ltd. The main drafters of this part: Zhang Liangen, Cai Zijin, Weng Shizhen, Feng Bochun, Liao Hongyi, Yang Zhaoling, Huang Zhilu, Ji Hongying This part was first issued in September 1984 and revised for the first time in 2003. 29
GB/T 4678.7—2003
1 Scope
Part 7: Straight guide bushings
Die casting die parts
This part specifies the dimensions and tolerances of straight guide bushings for die casting dies. This part is applicable to straight guide bushings used in die casting dies. This part also gives material guidelines and hardness requirements, and specifies the marking of straight guide bushings. 2 Normative references
The clauses in the following documents become clauses of this part through reference in this part of GB/T 4678. For any dated referenced document, all subsequent amendments (excluding errata) or revisions are not applicable to this part. However, parties to an agreement based on this part are encouraged to study whether the latest versions of these documents can be used. For any undated referenced document, the latest version applies to this part.
GB/T4679—2003 Technical conditions for die casting die parts 3 Dimensions and specifications
See Figure 1 and Table 1.
Surface roughness in microns
Surface roughness not specified Ra3.2μm.
Figure 1 Straight guide sleeve
Straight guide sleeve dimensions
Material and hardness
The material is selected by the manufacturer, and T10A and GCr15 are recommended. Hardness 50HRC55HRC
Unit is mm
5Technical requirements
Should comply with the provisions of GB/T4679-2003, marking
Straight guide sleeves according to this part should have the following markings: Straight guide sleeve;
b) Straight guide sleeve diameter D, in mm; c) Straight guide sleeve length L, in mm; d) This part code, i.e. GB/T4678.7-2003. Example:
D=16mm, L=25mm straight guide sleeve is marked as follows: Straight guide sleevewwW.bzxz.Net
5GB/T4678.7-2003
16×25
GB/T4678.7--2003
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.