GB/T 45679-2025 in English
VALIDPower spinning dies
- Issued on:2025-05-30
- Implemented on:2025-12-01
- File Format:PDF
- Delivery:Within 1 day
$210.00
| Standard No: | GB/T 45679-2025 |
| Document status: | VALID |
| Title in English: | Power spinning dies |
| Title in Chinese: | 强力旋压模具 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Within 1 day |
| Issued on: | 2025-05-30 |
| Implemented on: | 2025-12-01 |
| ICS Classification: | 25.120.10-Forging equipment. Presses. Shears |
| Chinese Classification: | J46-Mould |
| Professional Classification: | GB-National Standard |
| Related Keywords: | high-power spinning dies
flow spinning shear spinning flow spinning molds core mold size |
| Related Topics: | Optical module
Strong fixture |
《GB/T 45679-2025强力旋压模具》由TC33（全国模具标准化技术委员会）归口，主管部门为国家标准委。
Introduction
Analysis of the core content of the standard
GB/T 45679-2025 standard systematically regulates the technical system of high-power spinning dies, focusing on the design requirements of the three core components of core mold, unloading device and tail top device. The standard clearly divides spinning dies into two types according to deformation characteristics: shear spinning and flow spinning, and formulates differentiated technical specifications for different process characteristics.
Comparison of key technical indicators
| Technical parameters | Shear spinning mold | Flow spinning mold |
|---|---|---|
| Core mold structure | The semi-cone angle needs to be selected according to the lower limit of the product | Anti-interference section ≥100mm needs to be set |
| Surface roughness (Ra) | ≤0.8μm (working surface) | |
| Diameter tolerance | ±0.01mm(Φ≤50mm) | Workpiece-core mold gap 0.05-0.6mm |
| Hardness requirement | 58-66HRC (core mold body) | |
Structural design points
4.1 Core mold selection specifications
The standard clearly stipulates: when the minimum diameter of the core mold body is <150mm, a solid structure should be adopted, and when it is ≥150mm, a hollow structure is recommended. The hollow structure must meet the following requirements:
- Wall thickness> 3 times the thickness of the blank and ≥50mm
- Must be equipped with a special plug component
4.2 Connection method selection
Two connection schemes are provided according to the difference in machine tool interface size:
- Split type: Suitable for occasions with large differences in interface size
- Integral type: Preferred when the core mold size is close to the machine tool interface
Fitting tolerance requirements: H7/u6 is used for boltless connection and H7/p6 is used for bolted connection
Material and heat treatment specifications
| Component name | Recommended material | Hardness range |
|---|---|---|
| Main body of core mold | GCr15/Cr12MoV, etc. | 58-66HRC |
| Connecting flange | 45 steel/30CrMnSi | 36-40HRC |
| Tail top device | 45 steel/30CrMnSi | 32-36HRC |
Special requirements: The depth of the core mold hardened layer is ≥20mm, and it needs to be tested according to GB/T9450 standard
Precision control system
5.1
- Verticality of the installation end face ≤0.03mm
- Coaxiality of the profile ≤1/4 of the workpiece wall thickness tolerance
- Working runout ≤1/3 of the workpiece wall thickness tolerance
5.2 Testing methods
The standard stipulates the use of a variety of testing methods such as a three-coordinate measuring instrument and a special plug gauge:
- Outer diameter measurement: micrometer 4-point measurement method (45° interval)
- Roundness detection: 1/2 of the maximum and minimum diameter difference
- Straightness: Dial indicator measuring 4 evenly distributed generatrixes
Standard implementation recommendations
6.1 Manufacturing process optimization
The following process routes are recommended:
- Leave 2-3mm margin after rough machining
- Stress relief annealing
- Fine machining to the upper limit of size
- Vacuum quenching + cryogenic treatment
- Finally fine grinding to meet the standard
6.2 Key points of quality control
- Establish SPC control chart for key dimensions
- Perform hardness gradient detection for each batch
- Use blue light scanning for full surface verification
Technology evolution analysis
Compared with the old version of the standard, the main progress of GB/T 45679-2025 is reflected in:
- Add special technical requirements for flow spinning molds
- Refine the fitting clearance classification of workpieces of different diameters
- Introduce modern testing equipment (three-coordinate measuring machine) specifications
- Strengthen the hardened layer depth index (increased from 15mm to 20mm)
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