Production and machining method for bed knife of lawn mower

A processing method and lawn mower technology, applied in the direction of metal processing equipment, forming tools, manufacturing tools, etc., can solve the problems of long production cycle that cannot meet customer needs, time-consuming and labor-intensive processing, etc., to reduce labor costs, reduce costs, and parameters good performance effect

Active Publication Date: 2013-04-10
MAANSHAN GREEN FRIEND MACHINE MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the time-consuming and labor-intensive processing of lawn machine bottom knives in the prior art, the long production cycle cannot meet the needs of customers, the present invention provides a production and processing method of lawn machine bottom knive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Present embodiment 1 will process the lawn machine bottom knife of 1000 types, adopt processing technology of the present invention, and its steps are:

[0032] (1) According to the length and width of the blade, the size of the blanking die is determined to be 540mm×64.5mm, and the blanking die is opened; the punching die is opened according to the hole distance of 43.28mm and the diameter is 11mm; the pressing die is opened according to the radian R22mm; the material of the mold Choose Cr12MoV; after the mold is drilled and tapped and the threaded hole is punched, heat treatment at 1050 ° C for 2 hours;

[0033] (2) Temper at 445°C for 2 hours;

[0034] (3) After the mold in step (2) is cooled, perform a second tempering at 300°C for 2 hours;

[0035] (4) After the mold in step (3) is cooled, temper for the third time at 200°C for 2 hours;

[0036] (5) Use the mold processed in step (4) to perform wire-cutting processing and machining center processing. After the mo...

Embodiment 2

[0045] Present embodiment 2 will process the lawn machine bottom knife of 522 types, adopt processing technology of the present invention, and its steps are:

[0046] (1) According to the length and width of the blade, determine the size of the blanking die to be 560mm×65.5mm, and open the blanking die; open the punching die according to the hole distance of 43.28mm and the diameter of 8.3mm; open the pressing die according to the radian R12.5mm; mold The material used is Cr12MoV; after the mold is drilled and tapped and the threaded hole is punched, it is kept at 1060°C for 3 hours;

[0047] (2) Temper at 455°C for 2 hours;

[0048] (3) After the mold in step (2) is cooled, perform a second tempering at 310°C for 3 hours;

[0049] (4) After the mold in step (3) is cooled, temper for the third time at 210°C for 3 hours;

[0050] (5) Use the mold processed in step (4) to perform wire cutting and machining center processing. After the mold is installed, first heat the blade bl...

Embodiment 3

[0059] Present embodiment 3 will process the lawn machine bed knife of 128 types, adopt processing technology of the present invention, and its steps are:

[0060] (1) According to the length and width of the blade, determine the size of the blanking die to be 560mm×66mm, and open the blanking die; open the punching die according to the hole distance of 43.28mm and the diameter of 8.5mm; open the pressing die according to the radian R17.5; The material is Cr12MoV; after the mold is drilled and tapped and the threaded hole is punched, it is kept at 1055°C for 2.5h;

[0061] (2) Temper at 450°C for 2 hours;

[0062] (3) After the mold in step (2) is cooled, perform a second tempering at 305°C for 2.5 hours;

[0063] (4) After the mold in step (3) is cooled, temper for the third time at 205°C for 2.5 hours;

[0064] (5) Use the mold processed in step (4) to perform wire-cutting processing and machining center processing. After the mold is processed, first heat the blade blank t...

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Abstract

The invention discloses a production and machining method for a bed knife of a lawn mower, and belongs to the field of garden machines. The method comprises the following steps of: (1) making a blanking die, a punching die and a press molding die; (2) performing tempering for 2 hours at 445 to 455 DEG C; (3) performing secondary tempering for 2 to 3 hours; (4) performing tertiary tempering for 2 to 3 hours; (5) performing linear cutting machining and machining center machining on the dies, and after the dies are machined, pressing a blank to obtain a rough blank, wherein the blank is made from 65Mn spring steel; (6) reaming a counter bored hole; (7) performing reshaping by using a press; (8) grinding the rough blank by using a grinder; (9) heating the rough blank obtained by the step (8) at 760 to 800 DEG C by using a mesh belt furnace, wherein the transmission speed of a mesh belt is 4 to 6cm/s; (10) performing tempering for 3 hours at 375 to 385 DEG C; and (11) after the rough blank is cooled and reshaped by the press, performing blackening treatment, and grinding a plain end and a standing opening. According to the method, the production efficiency and the quality of a product are greatly improved under the conditions of the conventional product equipment, manpower and material resources, the time of delivery is shortened, and the competitiveness of the product is improved.

Description

technical field [0001] The invention belongs to the field of garden machinery, and more specifically relates to a method for producing and processing lawn machine bottom knives. Background technique [0002] In the traditional processing technology, the bottom knife of the lawn machine is cut by a shearing machine, and the two sides are ground by a grinder. Since the shearing machine is of fixed length, and the numerical control is used to arrange holes, drill holes, and milling machines to mill R grooves, the production efficiency is high. Extremely low cost, high cost, high loss of milling cutter, only less than 80 pieces can be processed in one shift, which prolongs the production and processing cycle of lawn mower bedknife and increases production cost. The use of lawn machine blades is very seasonal, only a few months, and the market demand is large in the peak season of use, and the traditional production and processing methods cannot meet the market demand. [0003] ...

Claims

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Application Information

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IPC IPC(8): B23P15/28B21D37/20C21D9/22
Inventor 胡加兵
Owner MAANSHAN GREEN FRIEND MACHINE MFG
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