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JB/T 12521-2015Deflection compensation crowning worktables for press brakes (English PDF)

板料折弯机用挠度补偿加凸工作台

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Issued by

MIIT

Level / Type

Industry · Recommended

Issue date

October 10, 2015

Implementation date

March 1, 2016

Scope

JB/T 12521-2015 is the English-translated version of 板料折弯机用挠度补偿加凸工作台.

JB/T 12521-2015 is a recommended Chinese machinery industry standard on the deflection compensation crowning worktable fitted to press brakes.

It gives the terms and definitions for the worktable, the common constructions it takes, the requirements it has to meet, the test methods that verify them, the inspection rules, and finally marking, packaging, transport and storage.

What falls within it is the sheet metal bending machine equipped with a deflection compensating crowned table, referred to throughout simply as the convex table.

The Chinese classification is J62 and the international one 25.120.10. Among the standards it quotes are GB/T 191, GB/T 231.1, GB/T 1804-2000, GB/T 1958, GB/T 4879-1999, GB 5226.1, GB/T 13384 and JB/T 8609.

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Document preview — JB/T 12521-2015

National Standard of the People's Republic of China

ICS: 25.120.10

Issued by: Ministry of Industry and Information Technology of the People's Republic of China

1 Scope
2 Normative references
3 Terms and definitions
4 Common structures
4.1 Work table with longitudinally adjusted wedge bolster
4.2 Work table with transversely adjusted wedge bolster
4.3 Work table with longitudinally and transversely adjusted wedge bolster
5 Requirements
5.1 General requirements
5.2 Materials
5.3 Heat treatment
5.4 Machining
5.5 Welded parts
5.6 Assembly
5.7 Appearance
5.8 Performance requirements
5.9 Geometrical accuracy
5.10 Electrical equipment
6 Test methods
6.1 Material test
6.2 Inspection of the heat treatment
6.3 Inspection of the machining
6.4 Inspection of the welded parts
6.5 Assembly inspection
6.6 Inspection of the appearance
6.7 Performance inspection
6.8 Inspection of the geometrical accuracy
6.9 Inspection of the electrical equipment
7 Inspection rules
7.1 Factory inspection
7.2 Type test
8 Marking, packaging, transport and storage
8.1 Marking
8.2 Packaging
8.3 Transport and storage
Figure 1 Structural diagram of the work table with longitudinally adjusted wedge bolster
Figure 2 Structural diagram of the work table with transversely adjusted wedge bolster
Figure 3 Structural diagram of the work table with longitudinally and transversely adjusted wedge bolster

What this standard covers

This standard specifies the terms and definitions, common constructions, requirements, test methods, inspection rules, marking, packaging, transport and storage of the deflection compensated work tables for sheet metal bending machines. This standard applies to sheet metal bending machine with deflection compensation plus convex table (hereinafter referred to as the convex table).

Document data

International classification (ICS): 25.120.10.

Chinese classification (CCS): J62.

Estimated length of the Chinese original: 9,920 words.

Standards quoted by this document

GB/T 191; GB/T 231.1; GB/T 1804-2000; GB/T 1958; GB/T 4879-1999; GB 5226.1; GB/T 13384; JB/T 8609

3 Terms and definitions

4 Common structures

5 Requirements

6 Test methods

7 Inspection rules

8 Marking, packaging, transport and storage

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

GB 5226.1

Similar standards

GB/T 14349-2026|GB/T 33644-2025|GB 28243-2012

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