This part specifies the dimensions and tolerances of push plate guide pins for die casting dies. This part is applicable to push plate guide pins for die casting dies. This part also gives material guidelines and hardness requirements, and specifies the marking of push plate guide pins. GB/T 4678.9-2003 Die casting die parts Part 9: Push plate guide pins GB/T4678.9-2003 Standard download decompression password: www.bzxz.net

GB/T4678 "Die casting die parts" is divided into 19 parts: Part 1: Template; Part 2: Round insert; Part 3: Rectangular insert; Part 4: Shouldered guide pin; Part 5: Headed guide pin; Part 6: Headed guide bushing; Part 7: Straight guide bushing; Part 8: Push plate; Part 9: Push plate guide pin; ||Part 10: Push plate guide sleeve;
Part 11: Push rod;
Part 12: Reset rod;
Part 13: Push plate washer;
-Part 14: Limit pin;
-Part 15: Spacer;
Part 16: Flat push rod;
-Part 17: Push tube;
Part 18: Support column;
Part 19: Positioning element.
This part is Part 9 of GB/T4678.
This part replaces GB/T4678.9-1984 "Push plate guide column for die casting die parts". Compared with GB/T4678.9--1984, the main changes of this part are as follows: GB/T 4678.9-2003
has made major changes in the arrangement of the standard, added "Foreword", "Scope" and "Normative Reference Documents", and specified the content of the mark.
has added a type of push plate guide pin (type A), which is divided into type A push plate guide pin and type B push plate guide pin. -The size specification series has been modified, and a large size specification series has been added. The material has been changed to recommended selection.
-The geometric tolerance requirements have been modified.
The surface roughness replaces 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). The drafting units of this part: Shanghai Pierburg Nonferrous Parts Co., Ltd., Guangzhou Cavity Mold Factory, Guilin Electrical Science Research Institute, Dongfeng Technology Automotive Braking System Company, Chengdu Xingguang Die Casting Industry Co., Ltd. The main drafters of this part are Zhang Liangen, Cai Zijin, Weng Shizhen, Feng Bochun, Liao Hongyi, Yang Zhaoling, Huang Zhilu and Li Hongying. This part was first issued in September 1984 and revised for the first time in 2003. 37
GB/T4678.9—2003
Die casting die parts Part 9: Push plate guide pins
This part specifies the dimensions and tolerances of push plate guide pins for die casting dies. This part is applicable to push plate guide pins used in die casting dies. This part also gives material guidelines and hardness requirements, and specifies the marking of push plate guide pins. 2 Normative references
The clauses in the following documents become clauses of this part through reference to this part of GB/T4678. For all dated references, all subsequent amendments (excluding errata) or revisions are not applicable to this part. However, parties to agreements 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 shall apply to this part.
GB/T4679—2003 Technical conditions for die casting die parts 3 Dimensions and specifications
3.1A-type push plate guide pillar
See Figure 1 and Table 1.
Surface roughness in micrometers
Not specified Surface roughness Ra=6.3μm; Not specified chamfer 1mm×45°. Optional backlash groove or R1mm fillet.
b Oil groove is allowed.
Allow the center holes at both ends to be retained.
Figure 1A-type push plate guide pillar
3.2B-type push plate guide pillar
See Figure 2 and Table 1.
Not specified Surface roughness Ra-6.3μm; Not specified chamfer 1mmX45° Optional grinding wheel overtravel groove or R1mm fillet.
Allow oil groove. bzxZ.net
Allow the center holes at both ends to be retained.
Figure 2 B-type push plate guide column
Table 1 Dimensions of A-type and B-type push plate guide columns
Material and hardness
The material is selected by the manufacturer, and T10A and GCr15 are recommended. Hardness 50 HRC～55 HRC.
5 Technical requirements
Should meet the requirements of GB/T4679-2003. 6 Marking
The push plate guide pins according to this part shall have the following markings: a) push plate;
GB/T 4678.9—2003
Surface roughness, in micrometers
Unit: millimeters
GB/T4678.9—2003
Push plate guide pin types A and B;
Diameter D of push plate guide pin, in millimeters; Length L1 of push plate guide pin, in millimeters; Code of this part, i.e. GB/T4678.9—2003. Example 1:
D=20mm, Li=80mm, the A-type push plate guide column is marked as follows: Push plate guide column
GB/T4678.9—2003
A20X80
Example 2:
D=20mm, L, =80mm, the B-type push plate guide column is marked as follows: Push plate guide column
B20X80GB/T4678.9-
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