GB/T 35093-2018CNC straight-side link-drive press—Accuracy (English PDF)
数控闭式多连杆压力机 精度
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
May 14, 2018
Implementation date
December 1, 2018
Scope
GB/T 35093-2018 is the English-translated version of 数控闭式多连杆压力机 精度.
GB/T 35093-2018 specifies the accuracy requirements and the matching test methods for CNC straight-side link-drive presses. It applies to single-action presses with two or four points used for bending, forming and drawing metal, and does not cover forging presses, blanking presses or special-purpose presses such as powder compacting machines.
The general requirements fix how the press is levelled before checking, take the upper surface of the bolster as the reference plane, set the edge zones excluded from flatness checks, require tolerances to be calculated on the actual measured length and rounded under GB/T 8170, and call for no-load testing under GB/T 10923 with the slide balancer working.
Inspection relies on dial indicators, squares, gauge blocks, spirit levels and straightedges. It was issued on 14 May 2018 and has applied since 1 December 2018.
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Document preview — GB/T 35093-2018
National Standard of the People's Republic of China
- ICS
- 25.120.10
- Classification
- J 62
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Precision
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
1 Scope
This standard specifies the accuracy and test method of the CNC closed multi-link press.
This standard applies to single-action double and four-point CNC closed multi-links used in the bending, forming and drawing processes of metal materials. Press (hereinafter referred to as press).
This standard does not apply to presses for forging, presses for punching, and special presses for special structures (such as powder forming presses).
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this document. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 1219 indicator
GB/T 6092-2004 square ruler
GB/T 6093-2001 Geometric quantity specification (GPS) length standard gauge block
GB/T 8170 Numerical Rounding Rules and Representation and Determination of Limit Values
GB/T 10923 Forging machinery precision inspection general rules
GB/T 16455-2008 Strip and frame level
GB/T 24760-2009 cast iron flat ruler
3 Precision
3.1 General requirements
3.1.1 Before the accuracy test, the installation level of the press should be adjusted. Place the level in the middle and horizontal direction of the press in the middle position of the table. The measurement installation level shall not exceed 0.10/1000.
3.1.2 The plane on the worktable is the reference plane for the accuracy check of the press.
3.1.3 When testing the rectangular plane, when the side length L is equal to or less than 1000mm, it is not detected within the range of 0.1L from the edge; When L is larger than 1000 mm, it is not detected within a range of 100 mm from the edge.
3.1.4 The accuracy test order of this standard does not indicate the actual inspection order. For easy assembly and disassembly inspection tools and inspection, in any order Carry out inspections.
3.1.5 The accuracy tolerance of the inspection item shall be calculated according to the actual inspection length. The calculation results were rounded to the micron digits according to GB/T 8170.
3.1.6 During the accuracy test of 3.2.2 and 3.2.3, the slider balancing mechanism shall be in working condition.
3.1.7 Accuracy inspection shall be carried out in accordance with the provisions of GB/T 10923 under no-load (ie no-load) conditions. During the inspection process, it is not allowed Adjust the mechanism and parts that affect accuracy. The clearance of the guide rail should ensure that the slider does not get stuck, the temperature of the friction part meets the requirements, and the double-sided clearance Generally, it is 0.05mm~0.40mm.
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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/T 1219Dial gauges
- GB/T 6092-2004Squares
- GB/T 6093-2001Geometrical product specifications (GPS) -- Length STANDARDs -- Gauge blocks
- GB/T 8170Rules of rounding off for numerical values & expression and judgement of limiting values
- GB/T 10923Test code of accuracy for metal forming machine
- GB/T 16455-2008Bar and frame level meter
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Related Standards
GB/T 10923-2009 — Test code of accuracy for metal forming machine
GB/T 1219-2008 — Dial gauges
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