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Machining method of high-strength handheld mower blade

A processing method and a hand-held technology, applied in the direction of harvesters, cutters, manufacturing tools, etc., can solve the problems of unstable heat treatment deformation quality, easy reduction of knife edge hardness, unstable dynamic balance, etc., to solve heat treatment deformation problems and improve Uniformity, the effect of improving the overall performance

Active Publication Date: 2021-09-24
安徽博行机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] This kind of processing technology has low production efficiency and high manufacturing cost. It is easy to reduce the hardness of the knife edge during the sharpening process. Processing method of lawn mower blade

Method used

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  • Machining method of high-strength handheld mower blade
  • Machining method of high-strength handheld mower blade
  • Machining method of high-strength handheld mower blade

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as Figure 1-3 Shown; A kind of high-strength hand-held lawn mower blade processing method, described high-strength hand-held lawn mower blade comprises blade body 1, cutting edge 2, mounting hole 3, positioning hole 4 and cooling groove 5, comprises the following steps:

[0031] S1: tool forming; inject molten steel into the mold, and cool the blade after forming, use a milling machine to roughly machine the mounting hole 3, the positioning hole 4 and the cooling groove 5;

[0032] S2: Punch the cutting edge, perform multiple continuous stamping on the cutting edge 2 position;

[0033] S3: Thermoforming + heat treatment, the tool is put into a 1000-degree heating furnace for hot forging and pressing, and isothermally quenched for 10 minutes. The hardness of the blade after quenching is 40-45HRC; thermoforming + heat treatment are combined into one process to replace the traditional one. The heat treatment and tempering shaping process of the process can not only ...

Embodiment 2

[0039] In the step S1, the molten steel is prepared from the following raw materials in parts by weight: 70 parts of carbon, 110 parts of chromium, 18 parts of manganese, 40 parts of silicon, 15 parts of tungsten, 18 parts of vanadium, 6 parts of titanium nitride, 2 parts of aluminum, 1 part nickel, 1 part rare earth, 9100 parts iron.

[0040] The rare earth is made by mixing and stirring lanthanum, neodymium and samarium, wherein 10 parts of lanthanum, 5 parts of neodymium, and 98 parts of samarium are added. Rare earth elements are added to improve the uniformity of carbide distribution in the cutter, thereby improving the overall performance of the cutter.

[0041] The distance between the upper side and the lower side of the cutting edge 2 is 7 mm, and the distance between the lower side of the blade body 1 and the upper side of the cutting edge 2 is 15.5 mm.

[0042] The overall dynamic balance of the blade of the high-strength hand-held lawn mower at a distance of 150 mm...

Embodiment 3

[0046] In the step S1, the molten steel is prepared from the following raw materials in parts by weight: 80 parts of carbon, 130 parts of chromium, 12 parts of manganese, 35 parts of silicon, 20 parts of tungsten, 10 parts of vanadium, 8 parts of titanium nitride, 4 parts of aluminum, 2 parts nickel, 2 parts rare earth, 9000 parts iron.

[0047] The rare earth is prepared by mixing and stirring lanthanum, neodymium and samarium, including 10 parts of lanthanum, 5 parts of neodymium and 98 parts of samarium.

[0048] The distance between the upper side and the lower side of the cutting edge 2 is 7 mm, and the distance between the lower side of the blade body 1 and the upper side of the cutting edge 2 is 15.5 mm.

[0049] The overall dynamic balance of the blade of the high-strength hand-held lawn mower at a distance of 150 mm from the center of rotation is less than 800 mg.

[0050] In the step S5, the model of the horizontal machining center is M125.

[0051] In the step S5,...

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Abstract

The invention relates to the technical field of hay mower blade machining, and discloses a machining method of a high-strength handheld hay mower blade. The machining method comprises the following steps: S1, cutter forming is carried out, molten steel in a molten state is injected into a mold, and cooling is carried out after the blade is formed; S2, cutting edge punching is carried out, and the cutting edge position is continuously punched multiple times; S3, thermal forming and heat treatment are carried out, specifically, a cutter is put into a heating furnace at the temperature of 1000 DEG C to be subjected to thermal forging forming, isothermal quenching is carried out for 10 minutes, and the hardness of the quenched blade is 40-45 HRC; S4, tempering is conducted, the temperature in the heating furnace is reduced to 500 DEG C at the speed of reducing 100 DEG C per minute, and tempering is conducted for 30 minutes at the temperature of 500 DEG C; S5, shot blasting is conducted, the cutter is put into a shot blasting machine to be subjected to surface polishing for 2 minutes; and S6, surface treatment is conducted, and the cutter is put into an electrophoresis device to be subjected to black electrophoresis. The problem of cutting edge breakage can be solved, the cutting edge strength is high, the process steps are shortened, the machining efficiency is improved, and the manufacturing cost is low.

Description

Technical field: [0001] The invention relates to the technical field of lawnmower blade processing, in particular to a high-strength hand-held lawnmower blade processing method. Background technique: [0002] Lawn mower (Lawn mower) is also known as weeder, lawnmower, lawn trimmer, etc. A lawn mower is a mechanical tool for mowing lawns, vegetation, etc. It is composed of a cutter head, an engine, a walking wheel, a walking mechanism, a blade, a handrail, and a control part. The cutterhead is installed on the walking wheel, the cutterhead is equipped with an engine, and the output shaft of the engine is equipped with a blade. The blade uses the high-speed rotation of the engine to increase the speed a lot, which saves the working time of the weeding workers and reduces a lot of human resources. [0003] At present, the lawn mower blades used in garden work generally adopt conventional manufacturing processes such as traditional stamping (single punch), heat treatment, sharp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00C21D8/00C21D9/18C22C38/00C22C38/02C22C38/04C22C38/06C22C38/44C22C38/46C22C38/50A01D34/412
CPCB23P15/00C21D8/005C21D9/18C22C38/02C22C38/04C22C38/06C22C38/44C22C38/46C22C38/50C22C38/005A01D34/412
Inventor 刘学轮
Owner 安徽博行机械有限公司
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