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 gears with a conical angle less than 40° through one-time pressing and sintering. This method is suitable for powder metallurgy production, and the process is simple and convenient. low cost

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
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Effect test

Embodiment 1

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

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

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

[0030] 3. Pressing is performed under a pressure of 500-650Mpa. During pressing, the upper die punch 1 remains stationary, the female die 2 is forced to float, and the lower die punch 3 performs a spiral movement along the imitation spiral line of the female die 2 with the axis as the center. The female mold 2 is forcibly pulled down at the end of the pressing, and the lower die punch 3 performs a spiral motion al...

Embodiment 2

[0033] The consumption relation of the used raw material of small spiral bevel gear among the present invention is as follows, other is the same as embodiment 1.

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

Embodiment 3

[0036] 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 Embodiment 1.

[0037] In the raw material, 200 mesh atomized iron powder 96kg, 200 mesh nickel powder 3kg, 150 mesh copper powder 1kg, 150 mesh carbon powder 0.3kg, 150 mesh zinc stearate 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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