GB/T 970.2-2008 English PDF

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GB/T 970.2-2008: Circular screwing dies -- Part 2: Technical specifications
Status: Valid

GB/T 970.2: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 970.2-2008	139	Add to Cart	3 days	Circular screwing dies -- Part 2: Technical specifications	Valid
GB/T 970.2-1994	199	Add to Cart	2 days	Technical specifications for cirular screwing dies	Obsolete

Similar standards

GB/T 33524.2   GB/T 972   GB/T 5104   GB/T 967   GB/T 971   GB/T 970.1   

Basic data

Standard ID: GB/T 970.2-2008 (GB/T970.2-2008)
Description (Translated English): Circular screwing dies -- Part 2: Technical specifications
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J41
Classification of International Standard: 25.100.50
Word Count Estimation: 6,678
Date of Issue: 2008-06-03
Date of Implementation: 2009-01-01
Older Standard (superseded by this standard): GB/T 970.2-1994
Quoted Standard: GB 443; GB/T 970.1
Regulation (derived from): National Standard Approval Announcement 2008 No.9 (Total No.122)
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the size of the circle die, material and hardness, appearance and surface roughness, performance test, basic requirements for marking and packaging. This section applies to both GB/T 970. 1 Production of round die.

GB/T 970.2-2008: Circular screwing dies -- Part 2: Technical specifications

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Circular screwing dies Part 2. Technical specifications ICS 25.100.50 J41 National Standards of People's Republic of China Replacing GB/T 970.2-1994 Round die Part 2. Technical requirements Posted 2008-06-03 2009-01-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

GB/T 970 "round die," consists of two parts. --- Part 1. round die and round die holder type and size; --- Part 2. Technical requirements. This section GB/T 970 - Part 2. This part is GB/T 970.2-1994 "round die technical conditions" amendments. Section compared with the GB/T 970.2-1994 The main changes are as follows. --- Added "foreword"; --- Standard name changed to "round die Part 2. technical conditions"; --- In the range of a chapter, the words "This standard applies to the processing of common screw (GB/T 192 ~ 193, GB/T 196 ~ 197) of the circular plate Teeth "to" This section applies to press GB/T 970.1 Production of round die "; This section instead of the date of implementation of the GB/T 970.2-1994. This part is proposed by China Machinery Industry Federation. This part of the tool by the National Standardization Technical Committee (SAC/TC91) centralized. This section is drafted. Chengdu Tool Institute. The main drafters of this section. thousands of summer. This part of the standard replaces the previous editions are. --- GB 970-1967, GB 970-1983; --- GB/T 970.2-1994. Round die Part 2. Technical requirements

1 Scope

This section provides round die size, material and hardness, surface roughness and appearance, performance testing, marking and packing of the basic requirements. This section applies to press GB/T 970.1 Production of round die.

2 Normative references

The following documents contain provisions which, through reference in this text, constitute provisions of this part. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this section, however, encourage the parties to this part of the research agreement Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this section. GB 443 L-AN Total loss system oil GB/T 970.1 round die Part 1. round die and round die holder type and size (GB/T 970.1-2008, ISO 2568. 1988, MOD)

3 Dimensions

Tolerance 3.1 round die outer diameter D of the press f10, E thickness tolerances press js12. 3.2 round die position tolerance given in Table 1. Table 1 millimeters Nominal diameter Radially outer axis Runout Side facing the axis Runout Foreign rounded cutting edge Oblique runout ≤6 0.12 0.15 - > 6 ~ 20 > 20 0.15 0.18 0.12 0.20 0.15 Note. Measurement and outer side facing the axis runout should be carried out on the threaded spindle taper.

4 material and hardness

4.1 round die having the same performance with other 9SiCr W6Mo5Cr4V2 alloy tool steel or high speed tool steel, and above grade Manufacturing materials. 4.2 hardness round die thread portion with 9SiCr made not less than 60HRC. Round die thread portion fabricated using W6Mo5Cr4V2

5 appearance and surface roughness

5.1 round die surface should not have cracks, scratches and rust. Cutting edge should be sharp and should not have glitches, blunt impact and grinding burns use Defective performance. 5.2 round die surface roughness of the upper limit value given in Table 2 below. ......

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