Method for manufacturing small spiral bevel gear

A technology of spiral bevel gear and manufacturing method, which is applied in the field of small spiral bevel gear manufacturing to achieve the effects of high production efficiency, short production cycle and high precision

Inactive Publication Date: 2008-07-09
陆海雷
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the defects existing in the existing small spiral bevel gear processing technology, the present invention provides a method for manufacturing spiral bevel gear

Method used

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  • Method for manufacturing small spiral bevel gear
  • Method for manufacturing small spiral bevel gear
  • Method for manufacturing small spiral bevel gear

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] Example 1

[0027] The formed small spiral bevel gear of the present invention is shown in Figure 1 and Figure 2, and its manufacturing method is as follows:

[0028] 1. First, mix 94 kg of 100 mesh atomized iron powder, 1 kg of 200 mesh nickel powder, 1 kg of 150 mesh copper powder, 0.6 kg of 150 carbon powder, and 0.8 kg of 150 zinc stearate.

[0029] 2. Put the mixed powder into the hopper, and transport it to the cavity composed of the upper die punch 1, the profiling female die 2, the lower die punch 3, and the core rod 4 through the powder conveying pipe;

[0030] 3. Press under the pressure of 500~650Mpa. During pressing, the upper die punch 1 will remain stationary, the female die 2 will be forced to float, and the lower die punch 3 will move along the axis of the imitation spiral of the female die 2. The female mold 2 is forcibly pulled down at the end of the pressing, and the lower die punch 3 again spirally moves along the copying spiral of the female mold 2, and...

Example Embodiment

[0032] Example 2

[0033] The relationship between the amount of raw materials used in the small spiral bevel gear of the present invention is as follows, and the others are the same as in Embodiment 1.

[0034] Among the raw materials, 98 kg of 150 mesh atomized iron powder, 150 mesh nickel powder 3 kg, 150 mesh copper powder 1 kg, 200 mesh carbon powder 0.6 kg, and 200 mesh zinc stearate 0.3 kg.

Example Embodiment

[0035] Example 3

[0036] The relationship between the amount of raw materials used in the small spiral bevel gear manufactured by the present invention is as follows, and the others are the same as in Example 1.

[0037] In the raw materials, the 200 mesh atomized iron powder is 96kg, the 200 mesh nickel powder is 3kg, the 150 mesh copper powder is 1kg, the 150 mesh carbon powder is 0.3kg, and the 150 mesh zinc stearate is 0.5kg.

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Abstract

The invention provides a manufacture method for a small spiral bevel gear. The method prepares a screw bevel gear with a taper angle less than 40 degrees through one time sintering, overcomes the detects existed in the exiting processing technique for the small spiral bevel gear and is suitable for power metallurgy manufacture, and has the advantages of convenient and simple technique as well as low cost. The invention uniformly mixes iron powder, alloy powder and suitable lubricant according to a certain proportion, spirally pressing and spirally depanning in a master form closed cavity die space, acquires the screw bevel gear with a taper angle less than 40 degrees through one time pressing and then sinters in a sintering furnace under 1120 DEG C with a protection atmosphere of cracked ammonia or nitrogen based atmosphere. The gear acquired through the technique has the advantages of simple structure, low cost and good batch consistence, etc., and acquires the screw bevel gear with a taper angle less than 40 degrees through one time pressing.

Description

technical field [0001] The invention relates to a method for manufacturing a spiral bevel gear of an electric tool, in particular to a method for manufacturing a small spiral bevel gear with a taper angle less than 40° for an angle grinder. Background technique [0002] The small spiral bevel gear is the primary transmission gear connected to the motor shaft of the angle grinder. Its function is to transmit the torque output by the motor to the output terminal through the spiral bevel gear. Its speed reaches 20,000 rpm, and its quality directly affects Machine quality and mechanical safety. However, the known small spiral bevel gears may be processed by machining methods, through blanking, forging, quenching and tempering, preliminary turning, milling, finishing turning and other processes. The output per shift is only less than 200 pieces, and there are large investment Low production efficiency, long production cycle, low material utilization rate, etc., and due to factor...

Claims

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Application Information

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IPC IPC(8): B22F5/08B22F3/16
Inventor 陆海雷叶桂斌
Owner 陆海雷
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