Machining technology of duplex chain wheel

Abstract

The invention provides a machining technology of a duplex chain wheel and belongs to the technical field of machinery. The problem of the poor strength of an existing duplex chain wheel is solved. Themachining technology of the duplex chain wheel comprises the following steps of A, material mixing, B, compression moulding forming, C, ring groove machining, D, sintering, E, heat treatment, F, oilquenching, G, cooling, H, tempering, I, vacuum cleaning, and J, hole seam sealing. The machining technology of the duplex chain wheel has the advantage that the strength of the chain wheel can be improved.

Description

technical field

[0001] The invention belongs to the technical field of machinery, and relates to a double-row sprocket, in particular to a double-row sprocket processing technology. Background technique

[0002] A double row sprocket refers to a sprocket with double rows of teeth. The existing double-row sprocket is produced by powder metallurgy, but the produced product and production process have the following disadvantages:

[0003] 1. Cold forming, low pressing density, density 6.8~7.0g / cm 3 . The material performance cannot meet the requirements, the strength is poor, the single-tooth tooth resistance is low, the impact resistance is poor, and the problem of tooth collapse is prone to occur.

[0004] 2. Warm pressing, pressing density can be pressed to 7.2~7.3g / cm 3 , The properties of the material meet the requirements, but the strength of the green body is poor and cannot be processed.

[0005] 3. Machining sintered blanks is difficult to process, expensive tools...

Examples

Embodiment 1

[0036] The double-row sprocket is made of the following raw materials in mass percentage: iron powder 92-94, copper powder 2.5-2.8, manganese powder 0.4-1.0, nickel powder 1.8-2.6, graphite powder 0.4-1.0, chromium powder 0.2-0.6, lubricated Agent 0.6~1.0, anti-segregation binder 0.30~0.5.

[0037] The double row sprocket processing technology comprises the following steps:

[0038] A. Mixing: Put the raw materials including iron powder, copper powder, manganese powder, nickel powder, chromium powder, graphite powder, lubricant and anti-segregation binder into the mixer for stirring and mixing. Preferably, the proportions of the above raw materials are: iron powder 93, copper powder 2.6, manganese powder 0.5, nickel powder 2.0, graphite powder 0.5, chromium powder 0.4, lubricant 0.8, and segregation-preventing binder 0.4.

[0039] B. Pour the mixed raw materials into the mold and press to make the density 7.3~7.36g / cm 3 The compact 1, wherein the temperature of the control m...

Embodiment 2

[0050] The structure and principle of the second embodiment are basically the same as the first embodiment, the difference is that the ratio of the raw materials used to manufacture the double-row sprocket is: iron powder 92, copper powder 2.5, manganese powder 0.4, nickel powder 1.8, Graphite powder 0.4, chrome powder 0.2, lubricant 0.6, anti-segregation binder 0.3.

Embodiment 3

[0052]The structure and principle of this third embodiment are basically the same as that of the first embodiment, except that the ratio of the raw materials used to manufacture the double row sprocket is: iron powder 94, copper powder 2.8, manganese powder 1.0, nickel powder 2.6, Graphite powder 1, chrome powder 0.6, lubricant 1, anti-segregation binder 0.5.

technical field

[0001] The invention belongs to the technical field of machinery, and relates to a double-row sprocket, in particular to a double-row sprocket processing technology. Background technique

[0002] A double row sprocket refers to a sprocket with double rows of teeth. The existing double-row sprocket is produced by powder metallurgy, but the produced product and production process have the following disadvantages:

[0003] 1. Cold forming, low pressing density, density 6.8~7.0g / cm 3 . The material performance cannot meet the requirements, the strength is poor, the single-tooth tooth resistance is low, the impact resistance is poor, and the problem of tooth collapse is prone to occur.

[0004] 2. Warm pressing, pressing density can be pressed to 7.2~7.3g / cm 3 , The properties of the material meet the requirements, but the strength of the green body is poor and cannot be processed.

[0005] 3. Machining sintered blanks is difficult to process, expensive tools...

Examples

Embodiment 1

[0036] The double-row sprocket is made of the following raw materials in mass percentage: iron powder 92-94, copper powder 2.5-2.8, manganese powder 0.4-1.0, nickel powder 1.8-2.6, graphite powder 0.4-1.0, chromium powder 0.2-0.6, lubricated Agent 0.6~1.0, anti-segregation binder 0.30~0.5.

[0037] The double row sprocket processing technology comprises the following steps:

[0038] A. Mixing: Put the raw materials including iron powder, copper powder, manganese powder, nickel powder, chromium powder, graphite powder, lubricant and anti-segregation binder into the mixer for stirring and mixing. Preferably, the proportions of the above raw materials are: iron powder 93, copper powder 2.6, manganese powder 0.5, nickel powder 2.0, graphite powder 0.5, chromium powder 0.4, lubricant 0.8, and segregation-preventing binder 0.4.

[0039] B. Pour the mixed raw materials into the mold and press to make the density 7.3~7.36g / cm 3 The compact 1, wherein the temperature of the control m...

Embodiment 2

[0050] The structure and principle of the second embodiment are basically the same as the first embodiment, the difference is that the ratio of the raw materials used to manufacture the double-row sprocket is: iron powder 92, copper powder 2.5, manganese powder 0.4, nickel powder 1.8, Graphite powder 0.4, chrome powder 0.2, lubricant 0.6, anti-segregation binder 0.3.

Embodiment 3

[0052]The structure and principle of this third embodiment are basically the same as that of the first embodiment, except that the ratio of the raw materials used to manufacture the double row sprocket is: iron powder 94, copper powder 2.8, manganese powder 1.0, nickel powder 2.6, Graphite powder 1, chrome powder 0.6, lubricant 1, anti-segregation binder 0.5.

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