Pinion Shaft

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PARAMETERS

HEGIN'S pinion shafts are mainly used in mining grinding mills including Ball mill, SAG mill, Rod mill, large Gearboxes and other equipment in Cement, Metallurgy, Wind power and other fields Gearbox series, Railway Track series, Electric Power series.We c

Pinion Shaft is the key component in the transmission system of the mill, especially the large-scale SAG mill , AG mill and ball mill. It has strict requirements for material and manufacturing, complex process flow and high precision. Therefore, the selection, technology and manufacture of pinion shaft reflect a certain industrial level. For this reason, our pinion shaft process design and manufacturing standards have standardized and strict standards. Gears must be hardened by gas carburizing according to AGMA, ASTM and ISO standards. Carburizing process must control heating and cooling process. The tolerances of individual components of pinion are classified according to the corresponding accuracy level, including pitch error, tooth direction error, tooth profile error, tooth thickness and surface roughness. To measure gear runout (radial runout, end runout). After all hardening and tempering are completed, the residual compressive stress can be reduced by grinding the tooth surface after grinding, forming and heat treatment. Incorrect grinding at the tooth surface and root angle can cause tension stress or cracks in these areas.
The accuracy of carburized gears should be up to AGMA2101-D04, AGMA6114 and AGMA2015 (A5), quenched and tempered gears should be up to AGMA2101-D04, AGMA6114 and AGMA2015 (A7). Metal inclusions (purity) shall be inspected in accordance with ASTM E45 and meet the requirements of AGMA 6114 Standard.

■ Pinion Shafts Materials and Mechanical Properties

Mechanical Properties	Material Brand
Mechanical Properties	17CrNiMo6	20CrNi2MoA	30Cr2Ni2Mo
Minimum Tensile Strength (Sample)	1080MPa	1080MPa	1000MPa
Minimum yield strength (specimen)	785MPa	785MPa	800MPa
Minimum Elongation	7%	8%	10%
Minimum Section Shrinkage	40%	35%	45%
Shock Value	Aku≥31J	Aku≥47J	Aku≥40J
Hardness (Surface)	HRC57-62	HRC57-62	HB300-340
Hardness (Core)	≥25HRC	≥25HRC	≥25HRC

■ Pinion Shaft Manufacturing Process

According to different materials and different requirements, it can be divided into two processes:
◆ Casting Ingot →Forging →NDT→Semi-finishing →Carburizing + Tempering →NDT → Grinding Finishing →Dimension Detection.
◆ Casting Ingot→ Forging →NDT→ Semi-finishing →Tempering→ NDT→ Finishing→ Dimension Detection .

■ Pinion Shafts Detection

After the final processing of teeth, 100% of the contact area and root area of the finishing teeth should be in accordance with AGMA6114 and ASTM.
Standard for visual inspection and magnetic particle inspection. Contact area includes tooth surface and other tooth colors. Root area consists of bottom alveolar and transition corner. Shaft part In addition to the keyway, magnetic particle inspection is also carried out in the district.

■ Pinion Shafts Carburizin

Surface carbon concentration, surface metallographic structure, carburized layer structure, carbide precipitation, retained austenite, core metallographic structure should be appropriate.When the standard is checked and conforms to AGMA 6114 Standard Table 7, Items 11-15 M2 and AGMA 2101-04.

Process

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■ Pinion Shafts Materials and Mechanical Properties

Material Brand

■ Pinion Shaft Manufacturing Process

■ Pinion Shafts Detection

■ Pinion Shafts Carburizin

Surface carbon concentration, surface metallographic structure, carburized layer structure, carbide precipitation, retained austenite, core metallographic structure should be appropriate.When the standard is checked and conforms to AGMA 6114 Standard Table 7, Items 11-15 M2 and AGMA 2101-04.