GB/T 35082-2018 in English
VALIDSteel cold extrusion part--Technical specification
- Issued on:2018-05-14
- Implemented on:2018-12-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$117.00
| Standard No: | GB/T 35082-2018 |
| Document status: | VALID |
| Title in English: | Steel cold extrusion part--Technical specification |
| Title in Chinese: | 钢质冷挤压件 工艺规范 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2018-05-14 |
| Implemented on: | 2018-12-01 |
| ICS Classification: | 77.140.85-Iron and steel forgings |
| Chinese Classification: | J32-Forging and pressing |
| Professional Classification: | GB-National Standard |
| Related Topics: | Direct pressure process
mass spectrometry squeeze process impurities process impurities GBT35082 GB/T 35082-2018 Direct pressing process layering Grade requirements for cold extruded parts Steel cold extrusion parts Germany Specification requirements for squeeze anchors |
《GB/T 35082-2018钢质冷挤压件 工艺规范》由TC74（全国锻压标准化技术委员会）归口，主管部门为国家标准化管理委员会。
Introduction
Interpretation of the National Standard of the People's Republic of China GB/T 35082—2018
Overview of Process Specifications for Cold Extruded Steel Parts
GB/T 35082—2018 "Process Specifications for Cold Extruded Steel Parts" is a standardized document guiding the production of cold extruded steel parts, covering important contents such as classification of deformation methods, determination of process plans, preparation of deformation procedures, determination of main process parameters, blank preparation and equipment selection principles.
Classification of cold extrusion deformation methods
According to the standard, the deformation methods of steel cold extrusion parts are divided into the following six types:
- Forward extrusion
- Reverse extrusion
- Compound extrusion
- Upsetting and extrusion compound
- Radial extrusion
- Free shrinkage
Interpretation of process specifications
| Process parameters | Forward extrusion | Reverse extrusion | Compound extrusion |
|---|---|---|---|
| Ratio of blank height to diameter ($h_{\mathrm{0}}/d_{\mathrm{0}}$) | $\leqslant5$ | Cup-shaped reverse extrusion part: $L_{1}/d_{1} \leqslant 2.5$ (can reach 5 with special equipment) | - |
| Deformation degree ($\left[\varepsilon_{\mathrm{F}}\right]$) | Reasonably select according to cross-sectional area | $40\% \sim 60\% | Can exceed the allowable value for unidirectional extrusion |
| Equipment selection principles | - | - | Deformation force calculation under closed conditions needs to be considered |
Professional terms and practical application case analysis
Section reduction rate ($\varepsilon_{\mathrm{F}}$): The proportion of the cross-sectional area of the material reduced during the cold extrusion process. For example, in forward extrusion, $\varepsilon_{\mathrm{F}} = \frac{F_{\mathrm{0}} - F_{\mathrm{1}}}{F_{\mathrm{0}}} \times 100\%$.
Unit extrusion pressure ($\phi$): Refers to the extrusion pressure per unit area, in megapascals (MPa). Determined by nomogram or numerical simulation method.
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