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Method for preparing rotary cultivator gearbox plate

A technology of rotary tiller and box plate, which is applied in the field of preparation of rotary tiller gearbox plate, can solve the problems that the rotary tiller transmission box is heavy and cannot be further reduced in weight, and achieves low cost, reduced deformation, and small preparation Effect

Inactive Publication Date: 2015-07-22
LIUZHOU SANNONG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems existing in the prior art, the present invention provides a method for preparing the gearbox plate of a rotary tiller. The technical problem to be solved is that the transmission box of the rotary tiller is heavy. In the case of use, the problem of not being able to further reduce weight

Method used

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Embodiment Construction

[0014] Preferred embodiments of the present invention are described below, and it should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0015] A preparation method for a gearbox plate of a rotary tiller, comprising the following steps: a, using a first mold to press and pre-stretch a Q345 steel plate to form a hemispherical stretching cavity to obtain the first pre-stretched steel plate;

[0016] b. Put the pre-stretched steel plate in the heating furnace and heat it to 500-530 degrees. After 3.5 hours of heat preservation, cut off the power and wait for the temperature of the furnace to drop to less than 300 degrees. It is air-cooled to form a tempered steel plate; wherein, the temperature in the heating furnace is preferably is 520 degrees.

[0017] c. pickling the annealed steel plate with hydrochloric acid with a mass percentage concentration o...

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Abstract

The invention discloses a method for preparing a rotary cultivator gearbox plate. The method comprises the following steps: a, performing stamping and pre-stretching on a Q345 steel plate by a first mould, and forming a hemispherical stretching cavity to obtain a first pre-stretched steel plate; b, heating the pre-stretched steel plate in a combustion heater to the temperature of 500-530 DEG C, keeping the temperature for 3.5h, cutting the power off, discharging when the furnace temperature is reduced to less than 300 DEG C, and air cooling to form a tempered steel plate; c, performing normal temperature acid pickling on the annealed steel plate by 10-15% hydrochloric acid till the oxidation layer of the annealed steel plate is fallen off to obtain a pickled plate; d, performing pre-stamping and stretching on the hemispherical stretching cavity in the pickled plate by a second mould to form an inverted truncated cone cavity with 90 degrees of a fillet surface on the side face to form a second pre-stretched steel plate; e, performing pre-stamping and stretching on the inverted truncated cone cavity in the second pre-stretched steel plate by a third mould to form a cylinder cavity to obtain the rotary cultivator gearbox plate. The method has the characteristics of convenient manufacture and high mechanical strength.

Description

technical field [0001] The invention belongs to the technical field of agricultural machinery and relates to a preparation method of a gearbox plate of a rotary tiller. Background technique [0002] The transmission boxes of the 121 rotary tillers currently produced in China are all traditional cast iron HT200 castings. The casting process for producing the castings is labor-intensive, the yield is low, and the environment is polluted. Overall weight and manufacturing cost of tiller, and is unfavorable for the raising of rotary tiller farming efficiency. The current solution is to reduce the weight of the transmission box of the 121 rotary tiller, that is, to reduce the thickness of the casting of the transmission box of the 121 rotary tiller, but this will reduce the mechanical strength of the transmission box, which is not worth the candle. Contents of the invention [0003] In order to solve the problems existing in the prior art, the present invention provides a metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/02C21D8/02C23G1/08
CPCB23P15/14
Inventor 潘承民
Owner LIUZHOU SANNONG TECH