GB/T 31396.3-2020 English PDF

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GB/T 31396.3-2020: Machine tools - Dimensions and geometric tests for self-centering chucks with two-piece jaws - Part 3: Power-operated chucks with serrated jaws
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 31396.3-2020	344	Add to Cart	3 days	Machine tools - Dimensions and geometric tests for self-centering chucks with two-piece jaws - Part 3: Power-operated chucks with serrated jaws	Valid

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Basic data

Standard ID: GB/T 31396.3-2020 (GB/T31396.3-2020)
Description (Translated English): Machine tools - Dimensions and geometric tests for self-centering chucks with two-piece jaws - Part 3: Power-operated chucks with serrated jaws
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J52
Classification of International Standard: 25.060.20
Word Count Estimation: 18,160
Date of Issue: 2020-04-28
Date of Implementation: 2020-11-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 31396.3-2020: Machine tools - Dimensions and geometric tests for self-centering chucks with two-piece jaws - Part 3: Power-operated chucks with serrated jaws

---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.
Machine tools--Dimensions and geometric tests for self-centring chucks with two-piece jaws--Part 3. Power-operated chucks with serrated jaws ICS 25.060.20 J52 National Standards of People's Republic of China Dimensions and geometry of self-centering chucks for machine tool separation claws Accuracy test. Part 3. Comb-tooth-fit power chuck (ISO 3442-3..2007, IDT) 2020-04-28 release 2020-11-01 implementation State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee

Contents

Foreword I 1 Scope 1 2 Normative references 1 3 General Instructions 1 3.1 Unit of measurement 1 3.2 Geometric accuracy test 1 3.3 Inspection item 1 4 Accuracy class 1 5 Interchangeable size 1 5.1 90 ° comb teeth size 1 5.2 Allowable cumulative error of 90 ° comb teeth 2 5.3 60 ° comb size 2 5.4 Accumulative allowable cumulative error of 60 ° comb teeth 3 5.5 T-nut size 3 6 Geometric accuracy test 4 6.1 Inspection rod 4 6.2 Check the accuracy of the shaft or the transition disc 5 6.3 Chuck body accuracy 7 6.4 Inspection with inspection top claw (hard claw) 7 6.5 Inspection with top jaws 7 6.6 Inspections not on the inspection axis 7 6.7 Chuck accuracy 8

Foreword

GB/T 31396 "Inspection of dimensions and geometric accuracy of self-centering chucks for machine tool separation claws" is divided into 3 parts. --- Part 1. Manual chuck with key and slot fit; --- Part 2. Power chuck with key and slot fit; --- Part 3. Comb-tooth-fit power chuck. This part is Part 3 of GB/T 31396. This section was drafted in accordance with the rules given in GB/T 1.1-2009. The translation method used in this part is equivalent to ISO 3442-3..2007 "Self-centering chuck dimensions and geometric accuracy of machine tool separation jaws. Part 3. Comb-tooth-fit power chuck. The documents in China that have a consistent correspondence with the normatively cited international documents in this section are as follows. --- GB/T 2516-2003 ordinary thread limit deviation (ISO 965-3..1998, MOD); --- GB/T 17421.1-1998 General rules for inspection of machine tools Part 1. Geometric accuracy of machine tools under no-load or finishing conditions (eqvISO 230-1..1996). The following editorial changes have been made in this section. --- Deleted the "check error" column in the "Geometric Accuracy Check" table in Chapter 6. This part is proposed by China Machinery Industry Federation. This part is under the jurisdiction of the National Metal Cutting Machine Tool Standardization Technical Committee (SAC/TC22). This section was drafted by. Hohhot Zhonghuan (Group) Co., Ltd., Yantai Global Machine Tool Equipment Co., Ltd. The main drafters of this section. Zhang Guobin, Du Shucheng, Wang Yongxiang, Yao Ping, Zhang Yuedong. Dimensions and geometry of self-centering chucks for machine tool separation claws Accuracy test. Part 3. Comb-tooth-fit power chuck

1 Scope

This part of GB/T 31396 specifies the interchangeable dimensions of 90 ° and 60 ° comb teeth and T-nuts and the separation claw (comb-tooth fit type) Geometric accuracy inspection and corresponding tolerance of centering power chuck. This section applies to self-centering power chucks with comb-toothed separation claws.

2 Normative references

The following documents are essential for the application of this document. For dated references, only the dated version applies to this article Pieces. For the cited documents without date, the latest version (including all amendments) applies to this document. ISO 230-1..1996 General rules for machine tool inspection Part 1. Geometric accuracy of machine tools under no-load or finishing conditions (Testcode formachinetools-Part 1. Geometricaccuracyofmachinesoperatingunderno-loadorfinishingcondi- tions) ISO 965-3 ISO General Purpose Metric Thread Tolerance Part 3. Deviation of Structural Threads (ISO general purpose metricscrewthreads-Tolerances-Part 3. Deviations for constructionalscrewthreads)

3 General instructions

3.1 Unit of measurement All dimensions and tolerances in this section are expressed in millimeters (mm). 3.2 Geometric accuracy inspection This part only stipulates the inspection of the chuck rotation accuracy and the positioning accuracy of the top jaws. Not applicable to other dynamic performance tests, Such as balance test or clamping force test. 3.3 Inspection items When inspecting the chuck, it is not necessary to complete all the inspections specified in this section. The user can select the relevant content for inspection when using this section.

4 Accuracy class

This section only specifies one accuracy level.

5 Interchangeable dimensions

5.1 90 ° comb size The interchangeable dimensions are shown in Figure 1 and Table 1. ......

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