CN113814400A - Production process of seedling needle of rice transplanter - Google Patents
Production process of seedling needle of rice transplanter Download PDFInfo
- Publication number
- CN113814400A CN113814400A CN202110948285.1A CN202110948285A CN113814400A CN 113814400 A CN113814400 A CN 113814400A CN 202110948285 A CN202110948285 A CN 202110948285A CN 113814400 A CN113814400 A CN 113814400A
- Authority
- CN
- China
- Prior art keywords
- production process
- seedling needle
- rice transplanter
- seedling
- needle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21G—MAKING NEEDLES, PINS OR NAILS OF METAL
- B21G1/00—Making needles used for performing operations
- B21G1/003—Needles for special purposes, e.g. knitting, crochet, hat-pins
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1003—Use of special medium during sintering, e.g. sintering aid
- B22F3/1007—Atmosphere
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Textile Engineering (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention discloses a production process of a seedling needle of a rice transplanter, which improves the problems that the existing seedling needle is poor in wear resistance and impact resistance and easy to damage, and is difficult to work in a paddy field without hitting sundries such as stones, so that the seedling needle is required to have quite strong wear resistance and impact resistance, on the other hand, the seedling needle is complex in structure and complicated in production, assembly and maintenance, raw materials are treated by adopting a powder metallurgy mode, and the obtained blank is matched with a cold forging and stamping production mode, so that the wear resistance and impact resistance of the seedling needle are greatly improved, and meanwhile, the seedling needle is produced by adopting the cold forging and stamping modes, so that the production efficiency of the seedling needle is greatly improved, and the production cost and the production difficulty are reduced.
Description
Technical Field
The invention relates to the field of powder metallurgy, in particular to a production process of seedling needles of a rice transplanter.
Background
Powder metallurgy is a process technology for producing metal or metal powder (or a mixture of metal powder and nonmetal powder) as a raw material, and then forming and sintering the raw material to produce metal materials, composite materials and various products. Due to the advantages of the powder metallurgy technology, the powder metallurgy technology becomes a key for solving the problem of new materials, and plays a significant role in the development of the new materials. The rice transplanter is a planting machine for planting rice seedlings in paddy fields, so that the working efficiency and the planting quality of rice seedlings are improved, reasonable dense planting is realized, and the mechanization of subsequent operation is facilitated. The working process of the transplanter is different due to different structures, but the basic flow is approximately the same, and the principle of 'group successive division seedling taking and direct transplanting' is as follows: the seedlings are put into the seedling box in order in a group state and move transversely along with the seedling box, so that the seedling taking device takes away a certain number of seedlings in a grid division mode, the seedlings are inserted into soil according to the seedling transplanting requirement under the action of the seedling transplanting track control mechanism, and the seedling taking device returns to the seedling box to take the seedlings according to a certain track. The transplanting structure of the transplanter is an important component of the transplanter, for example, the transplanting needle of the transplanter directly contacts with the seedling in the transplanting process to quickly and accurately transplant the seedling into the paddy field, so the reasonable structure of the transplanting needle structure directly influences the transplanting efficiency and the transplanting quality; the existing transplanting needle has poor wear resistance and impact resistance and is easy to damage, and is difficult to work in a paddy field without hitting sundries such as stones, so the transplanting needle is required to have quite strong wear resistance and impact resistance, and the existing transplanting needle has complex structure, is more complicated to produce, assemble and maintain and is easy to damage seedlings, increases the cost of using and maintaining time, and causes the overall transplanting efficiency of the transplanter to be reduced;
based on the problems, the invention provides a production process of seedling needles of a rice transplanter.
Disclosure of Invention
Therefore, aiming at the problems, the invention provides a production process of a seedling needle of a rice transplanter, which solves the technical problems that the existing seedling needle is poor in wear resistance and impact resistance and easy to damage, and is difficult to work in a paddy field and can not hit stones and other sundries, so that the seedling needle is required to have quite strong wear resistance and impact resistance, and on the other hand, the structure is complex, the production, assembly and maintenance are more complicated, and seedlings are easily damaged.
In order to achieve the purpose, the invention adopts the following technical scheme: a production process of seedling needles of a rice transplanter comprises the following steps:
1) preparing metal powder;
2) mixing required multiple metal powders according to a certain proportion, and homogenizing;
3) pressing uniform metal powder into a die to enable the density of the prefabricated blank to reach 6.5-6.6g/cm3, and feeding the prefabricated blank into a sintering furnace for heating;
4) demolding and cooling at normal temperature;
5) and cutting the obtained metal ingot, and putting the cut metal block into a cold forging die or a forming die for forging and stamping forming.
Further, the metal powder prepared in step 1 may adopt two methods, a reduction method and a mechanical method.
Further, in the step 2, the powder is stirred for 60-80 minutes in a stirring chamber sealed at normal temperature by adopting a stirring device.
Further, in the step 3, the sintering furnace is sintered in a neutral gas environment to prevent carburization and decarburization.
Further, the metal ingot obtained in the step 4 can repeat the steps 1-3 again, so that the mixing effect of different types of metal powder in the raw materials is further improved.
Further, the sintering temperature in the step 3 is 1100-1200 ℃, and the sintering time is 6-8 hours.
Further, the preheating is carried out in the step 3 by adopting a temperature control mode of gradually raising the temperature, wherein the temperature raising rate is 5-10 ℃/min.
By adopting the technical scheme, the invention has the beneficial effects that: the production process for the seedling needle of the rice transplanter improves the wear resistance and impact resistance of the existing seedling needle, is easy to damage, and is difficult to work in a paddy field without hitting sundries such as stones, so that the seedling needle is required to have quite strong wear resistance and impact resistance, the structure is complex on the other hand, the production and assembly maintenance are more complicated, the raw materials are treated by adopting a powder metallurgy mode, the obtained blank is matched with a cold forging and stamping production mode, so that the wear resistance and impact resistance of the seedling needle are greatly improved, and meanwhile, the seedling needle is produced by adopting a cold forging and stamping mode, the production efficiency of the seedling needle is greatly improved, and the production cost and the production difficulty are reduced.
Detailed Description
The invention will now be further described with reference to specific embodiments.
The embodiment provides a production process of seedling needles of a rice transplanter, which comprises the following steps:
1) preparing metal powder;
2) mixing required multiple metal powders according to a certain proportion, and homogenizing;
3) pressing uniform metal powder into a die to enable the density of the prefabricated blank to reach 6.5-6.6g/cm3, and feeding the prefabricated blank into a sintering furnace for heating;
4) demolding and cooling at normal temperature;
5) and cutting the obtained metal ingot, and putting the cut metal block into a cold forging die or a forming die for forging and stamping forming.
The metal powder prepared in step 1 may be prepared by a reduction method or a mechanical method.
And in the step 2, the powder is stirred for 60-80 minutes in a stirring chamber sealed at normal temperature by adopting a stirring device.
And 3, sintering in the sintering furnace in the step 3 in a neutral gas environment to prevent carburization and decarburization.
And (4) repeating the steps 1-3 again to the metal ingot obtained in the step 4, so as to further improve the mixing effect of different types of metal powder in the raw materials.
The sintering temperature in the step 3 is 1100-1200 ℃, and the sintering time is 6-8 hours.
And step 3, preheating by adopting a temperature control mode of gradually raising the temperature, wherein the temperature raising rate is 5-10 ℃/min.
In the step 2, multiple metal powders are prepared according to 1-2 parts of tungsten carbide and Cr121-2 parts of vanadium, 1.0-1.6 parts of molybdenum, 3-4.0 parts of carbon, 0.5-1.5 parts of carbon and the balance of iron.
By adopting the technical scheme, the invention has the beneficial effects that: the production process for the seedling needle of the rice transplanter improves the wear resistance and impact resistance of the existing seedling needle, is easy to damage, and is difficult to work in a paddy field without hitting sundries such as stones, so that the seedling needle is required to have quite strong wear resistance and impact resistance, the structure is complex on the other hand, the production and assembly maintenance are more complicated, the raw materials are treated by adopting a powder metallurgy mode, the obtained blank is matched with a cold forging and stamping production mode, so that the wear resistance and impact resistance of the seedling needle are greatly improved, and meanwhile, the seedling needle is produced by adopting a cold forging and stamping mode, the production efficiency of the seedling needle is greatly improved, and the production cost and the production difficulty are reduced.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. A production process of seedling needles of a rice transplanter is characterized in that: the method comprises the following steps:
1) preparing metal powder;
2) mixing required multiple metal powders according to a certain proportion, and homogenizing;
3) pressing the homogeneous metal powder into the mould and bringing the density of the preform to 6.5-6.6g/cm3Feeding the mixture into a sintering furnace for heating;
4) demolding and cooling at normal temperature;
5) and cutting the obtained metal ingot, and putting the cut metal block into a cold forging die or a forming die for forging and stamping forming.
2. The production process of the seedling needle of the rice transplanter as claimed in claim 1, wherein: the metal powder prepared in step 1 may be prepared by a reduction method or a mechanical method.
3. The production process of the seedling needle of the rice transplanter as claimed in claim 1, wherein: and in the step 2, the powder is stirred for 60-80 minutes in a stirring chamber sealed at normal temperature by adopting a stirring device.
4. The production process of the seedling needle of the rice transplanter as claimed in claim 1, wherein: and 3, sintering in the sintering furnace in the step 3 in a neutral gas environment to prevent carburization and decarburization.
5. The production process of the seedling needle of the rice transplanter as claimed in claim 1, wherein: and (4) repeating the steps 1-3 again to the metal ingot obtained in the step 4, so as to further improve the mixing effect of different types of metal powder in the raw materials.
6. The production process of the seedling needle of the rice transplanter as claimed in claim 1, wherein: the sintering temperature in the step 3 is 1100-1200 ℃, and the sintering time is 6-8 hours.
7. The production process of seedling needles of a rice transplanter as claimed in claim 6, wherein: and step 3, preheating by adopting a temperature control mode of gradually raising the temperature, wherein the temperature raising rate is 5-10 ℃/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110948285.1A CN113814400A (en) | 2021-08-18 | 2021-08-18 | Production process of seedling needle of rice transplanter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110948285.1A CN113814400A (en) | 2021-08-18 | 2021-08-18 | Production process of seedling needle of rice transplanter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113814400A true CN113814400A (en) | 2021-12-21 |
Family
ID=78922876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110948285.1A Pending CN113814400A (en) | 2021-08-18 | 2021-08-18 | Production process of seedling needle of rice transplanter |
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| Country | Link |
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| CN (1) | CN113814400A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2352620A1 (en) * | 1972-10-24 | 1974-05-02 | Crucible Inc | TOOL STEEL AND A PROCESS FOR MANUFACTURING WORKPIECES FROM THE SAME |
| JP2012077348A (en) * | 2010-09-30 | 2012-04-19 | Hitachi Powdered Metals Co Ltd | Production method for sintered member |
| CN105983702A (en) * | 2016-01-19 | 2016-10-05 | 安徽蓝博旺机械集团精密液压件有限责任公司 | Powder forging method for forklift engine connecting rod |
| CN105983699A (en) * | 2016-01-19 | 2016-10-05 | 安徽蓝博旺机械集团液压流体机械有限责任公司 | Powder forging method for forklift shock absorber piston rod |
| CN105983698A (en) * | 2016-01-19 | 2016-10-05 | 安徽蓝博旺机械集团液压流体机械有限责任公司 | Powder forging method for forklift hub bearing |
| CN109295398A (en) * | 2018-07-30 | 2019-02-01 | 常州格瑞特粉末冶金有限公司 | A kind of powder metallurgy brake boost pump shaft coupling production technology |
| CN110586924A (en) * | 2018-06-11 | 2019-12-20 | 深圳市冠强粉末冶金制品有限公司 | Preparation process of powder metallurgy part |
-
2021
- 2021-08-18 CN CN202110948285.1A patent/CN113814400A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2352620A1 (en) * | 1972-10-24 | 1974-05-02 | Crucible Inc | TOOL STEEL AND A PROCESS FOR MANUFACTURING WORKPIECES FROM THE SAME |
| JP2012077348A (en) * | 2010-09-30 | 2012-04-19 | Hitachi Powdered Metals Co Ltd | Production method for sintered member |
| CN105983702A (en) * | 2016-01-19 | 2016-10-05 | 安徽蓝博旺机械集团精密液压件有限责任公司 | Powder forging method for forklift engine connecting rod |
| CN105983699A (en) * | 2016-01-19 | 2016-10-05 | 安徽蓝博旺机械集团液压流体机械有限责任公司 | Powder forging method for forklift shock absorber piston rod |
| CN105983698A (en) * | 2016-01-19 | 2016-10-05 | 安徽蓝博旺机械集团液压流体机械有限责任公司 | Powder forging method for forklift hub bearing |
| CN110586924A (en) * | 2018-06-11 | 2019-12-20 | 深圳市冠强粉末冶金制品有限公司 | Preparation process of powder metallurgy part |
| CN109295398A (en) * | 2018-07-30 | 2019-02-01 | 常州格瑞特粉末冶金有限公司 | A kind of powder metallurgy brake boost pump shaft coupling production technology |
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