Production method of novel round cage digging hoe with handle

Abstract

The invention relates to a production method of a novel round cage digging hoe with a handle, which comprises the following steps: S100, manufacturing an upper hoe plate: heating a steel block, then taking out the steel block, removing oxide skin, forging the steel block into an upper hoe plate structure with a certain shape, punching the upper hoe plate to form a hoe cage structure, and then forging and annealing the hoe cage structure for forming; the lower hoe plate forging process comprises the steps that S21, a manganese steel belt is flattened through a press machine and cut to be in a proper size; s22, after being heated, the manganese steel strip is placed in a solution obtained after sodium nitrate and sodium nitrate are heated and melted for soaking and quenching, and after being taken out, the manganese steel strip is tempered and then subjected to secondary soaking and quenching; s230, the lower edge of the quenched manganese steel strip is ground into a cutting edge, and then the manganese steel strip is pressed into an arc shape; and S200, the lower edge of the upper hoe plate and the upper edge of the lower hoe plate are welded after being in butt joint. The hoe has the advantages that the service life of the hoe is long, specifically, the hoe cage cannot fall off, the lower cutting edge of the hoe plate is high in strength and not prone to abrasion, and the hoe handle is not prone to deformation, breakage and falling off on the hoe lug.

Description

Technical Field

[0001] The present invention relates to the technical field of farm tool preparation, in particular to a production method of a new type of round cage with handle digging hoe. Background Art

[0002] Agricultural hoes usually include a hoe plate (in the shape of a house tile), a hoe cage (hoe ear), and a hoe handle. For conventional hoes, the hoe plate and hoe ear are made of ordinary steel materials. The hoe cage is fixed at the upper edge of the hoe plate by welding; a cutting edge is ground at the lower edge of the hoe plate; the hoe handle is made of a wooden structure, and the hoe plate is inserted into the hoe cage.

[0003] However, the problems are as follows: for a digging hoe: (1) Since ordinary steel is used and no special treatment is carried out, the cutting edge is worn quickly during the digging process, affecting the service life of the hoe; (2) In addition, since ordinary steel is used, the hoe plate in the shape of a house tile is easily deformed when prying the soil, affecting the service life of the hoe; (3) The hoe cage is welded at the upper edge of the hoe plate. When digging, the soil contains moisture, which will cause corrosion at the welding part of the hoe cage, and then the welding part is easily cracked under the action of prying the soil - resulting in the detachment of the hoe cage; (4) Since the hoe handle is made of a wooden structure, under the action of moisture in the soil, the hoe handle is easily rotten, and the hoe handle often breaks at the hoe cage during digging.

[0004] Based on this, our factory adopts a new preparation method for a digging hoe to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a production method of a new type of round cage with handle digging hoe to solve the problem of low service life of the hoe.

[0006] The purpose of the present invention is achieved through the following technical solutions: A production method of a new type of round cage with handle digging hoe includes the following steps: S100. Hoe plate manufacturing, including upper hoe plate manufacturing and lower hoe plate manufacturing; The upper hoe plate manufacturing: Heat the steel block, then take it out and remove the oxide scale, and then use a roll forging machine and a mold to forge the steel block without oxide scale into an upper hoe plate structure of a certain shape; Punch holes in the upper hoe plate using a press and a mold - to form a hoe cage structure, use a punching machine and a mold to remove the scrap, and then use a press and a mold to forge, anneal and form; The lower hoe plate forging: S21. Press the 65# manganese steel belt flat with a press, and then cut it to a suitable size; S22. Place sodium nitrate and sodium nitrite in the heating and melting pool in a ratio of 50% each, and heat to 280°C - 350°C. At the same time, heat the manganese steel sheet in the quenching furnace to 780°C - 850°C, then place the manganese steel sheet in the molten sodium nitrate and sodium nitrite in the melting pool for quenching, and the soaking quenching time is 15 min - 20 min; then remove the manganese steel strip, place it in the quenching furnace for tempering at 780°C - 850°C, and then place it in the molten sodium nitrate and sodium nitrite in the melting pool for soaking quenching for 15 min - 20 min; after taking out the manganese steel strip, the hardness of the manganese steel strip reaches 48° - 52°. S23. Grind the lower edge of the quenched manganese steel strip into a cutting edge with a grinding machine, and then press the manganese steel strip into an arc shape. S200. Butt-weld the lower edge of the upper hoe plate and the upper edge of the lower hoe plate.

[0007] As a candidate technical solution of this application, it also includes the preparation of the S300 hoe handle: Cut the Q32 steel pipe into a 1.2 m long steel pipe section, heat the pipe orifice at the lower end of the steel pipe section and expand it into a flared shape, put a middle rubber sleeve on the middle of the steel pipe section, and put a tail rubber sleeve on the tail.

[0008] Further, when installing the hoe handle and the hoe plate: Insert the hoe handle into the hoe cage formed by punching in the hoe plate and weld it firmly. Then use a press to press a 15 cm long wooden core into the flared opening at the lower end of the hoe handle at the hoe cage to form a structure that increases the strength of the hoe handle at the hoe cage.

[0009] As a candidate technical solution of this application, the manufacturing of the upper hoe plate includes the following steps: S11. First, heat the steel block to 1350°C - 1450°C; S12. Then take out the heated steel block and remove the oxide scale; S13. Place it in a roll forging machine and forge it into an upper hoe plate sheet with a certain arc and a certain thickness using a mold; S14. Punch holes with a punching machine near the upper edge of the upper hoe plate sheet, and then further expand the holes to form a hoe cage structure near the upper edge of the upper hoe plate sheet; S15. Use a punching machine and a mold to cut off the corner materials at the edges of the punched upper hoe plate sheet to initially form the upper hoe plate; S16. Heat to 1050°C - 1150°C for forging, and then heat to 850°C - 950°C in a tempering furnace and automatically cool for tempering; S17. After polishing, form the finished product.

[0010] Further, in S11, the steel block is made of waste rails as raw materials, and the waste rails are cut into blocks.

[0011] Further, in S13, the steel block is placed in a 500-ton roll forging machine and forged into the structure of the upper hoe plate using a die; and the upper hoe plate has the radian of a tile-like structure, the thickness of the lower edge of the upper hoe plate is 2.5 cm, and the thickness of the upper edge is 4.5 cm, and the thickness gradually increases from the lower edge to the upper edge.

[0012] Further, in S16, after the preliminarily formed upper hoe plate is heated to a temperature of 1050°C - 1150°C, it is pressed into shape using a die in a 300-ton press; then it is tempered by heating in a tempering furnace to 850°C to 950°C and automatically cooling to make the upper hoe plate reach the required strength.

[0013] As a candidate technical solution of this application, after the upper hoe plate and the lower hoe plate are welded, the welding joint is ground flat, and then the welding joint is finely ground.

[0014] For ease of understanding, the core innovation points and principles of this solution are described as follows: 1. Prevent the hoe cage from falling off the hoe plate and improve the service life of the hoe. It should be noted that in the existing related technologies, the hoe cage is fixed at the upper edge of the hoe plate by welding. During the process of digging the ground, the welding joint comes into contact with the moisture in the soil, which will cause corrosion. And during the digging process, the force acting on the hoe cage is relatively large. Therefore, this welding joint is prone to falling off after long-term use. Therefore, in this solution, the hoe cage and the hoe plate are prepared by an integral forging method. The integral structure of the hoe cage and the hoe plate will not fall off even if corrosion occurs and can withstand a large force, thus improving the service life of the hoe. 2. Increase the strength of the hoe plate and increase the wear resistance of the hoe plate. It should be noted that in the existing related technologies, the hoe plate is an integral structure, that is, the upper part and the lower part of the hoe plate are integrally formed. The lower part of the hoe plate needs to be tempered and quenched. The thermal stress and tissue stress generated during the quenching process of the lower part of the hoe plate will be transmitted to the unquenched parts (i.e., the upper part of the hoe plate), which will cause these unquenched parts to deform or crack. Then, during the process of hoeing the ground, it is easy to break the hoe plate when prying the soil.

[0015] Therefore, in this solution, the hoe plate is divided into an upper hoe plate and a lower hoe plate, and the upper hoe plate and the lower hoe plate are processed separately: among them, the upper hoe plate and the hoe cage are integrally forged (in addition to preventing the hoe cage from falling off, this method of separately processing the upper hoe plate and the lower hoe plate is also conducive to the integral forging processing of the upper hoe plate and the hoe cage); among them, since the lower hoe plate is forged separately and then quenched separately, when the upper hoe plate and the lower hoe plate are separately made and then welded, it can prevent the thermal stress and tissue stress during quenching from being transmitted to the upper hoe plate, thereby improving the service life of the hoe plate.

[0016] In addition, in this solution, the upper hoe plate is made of discarded rails, and the lower hoe plate is made of 65# manganese steel strip, enhancing the strength of the entire hoe plate (in the prior art, very ordinary steel plates are usually used); moreover, the lower hoe plate is immersed in a molten sodium nitrate and pressed sodium nitrate solution formed in a 1:1 ratio for quenching, improving the wear resistance of the edge of the lower hoe plate.

[0017] Third, the strength of the connection between the hoe handle and the hoe cage is increased; It should be noted that in the existing related technologies, the hoe handle is made of wood. During long-term use, the wooden hoe handle is prone to contact with moisture at the hoe cage, resulting in corrosion and finally causing the hoe handle to break at the hoe cage.

[0018] In this solution, the hoe handle is made of a round steel pipe, and the lower end pipe orifice of the round steel pipe is expanded into a flared mouth; during installation, the lower end of the round steel pipe is inserted into the hoe cage and welded, and then a long wooden core is inserted into the flared mouth, forming a structure that expands the outer part of the lower end of the original steel pipe, which can prevent the original steel pipe from being flattened or bent.

[0019] The present invention has the following advantages: the service life of the hoe is high. Specifically, the hoe cage will not fall off, the strength of the lower edge of the hoe plate is high - it is not easily worn, and the hoe handle is not easily deformed, broken, or detached at the hoe ear. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a partial enlarged view of the present invention; In the figure: 1 - upper hoe plate, 2 - lower hoe plate, 3 - wooden core, 4 - hoe handle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following further describes the present invention with reference to the drawings, but the protection scope of the present invention is not limited to the following description.

[0022] It should be noted that the orientation or positional relationship indicated by "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of this invention is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. Such terms are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0023] It should be noted that, without conflict, the embodiments in the present invention and the features and technical solutions in the embodiments can be combined with each other.

[0024] Such as Figure 1 and Figure 2As shown in the figure, a production method of a new type of round-cage with handle earth-digging hoe includes the following steps: S100. Preparation of the hoe plate. The hoe plate includes an upper hoe plate and a lower hoe plate. The upper hoe plate and the lower hoe plate are prepared separately. S200. Then, butt-weld the upper hoe plate and the lower edge. S300. Prepare the hoe handle and install the hoe handle on the hoe plate.

[0025] Next, further description is made on the preparation of the upper hoe plate in S100.

[0026] S11. Use waste rail steel as raw material. Cut the waste rail steel into plates to form steel blocks. Put the steel blocks into a heating furnace for heating and heat them to 1350°C - 1450°C. S12. Then hook out the steel blocks from the heating furnace and remove the oxide scale. S13. Then put the steel blocks into a 500-ton roll forging machine and forge them into a certain shape with a die - that is, form an upper hoe plate piece (i.e., in a sheet shape). The upper hoe plate piece has a tile-like structure of a house. The thickness of the lower edge of the upper hoe plate piece is 2.5 cm, and the thickness of the upper edge is 4.5 cm, and the thickness gradually increases from the lower edge to the upper edge. S14. Put the upper hoe plate piece into a 300-ton punch press and control the first punching with a die. The punching is at a position below the upper edge of the upper hoe plate piece. Then put the upper hoe plate piece after the first punching into a 300-ton friction press and control the second punching with a die (increase the size of the punching to make the size consistent with the hole size of the hoe cage), thus preparing the hoe cage. It should be noted that controlling with a die means forging the corresponding material into a shape consistent with the die. S15. Put the upper hoe plate piece after reaming the hole into a 200-ton punch press and cut off the excess corner materials through a die to initially form the upper hoe plate. S16. Heat the initially formed upper hoe plate to 1050°C - 1150°C, then put it into a 300-ton friction press and forge it into shape through a die. Put the forged upper hoe plate into a tempering furnace and heat it to 850°C - 950°C, and then automatically cool it for tempering to make the upper hoe plate reach the required strength. S17. Polish the upper hoe plate to form the upper hoe plate. After passing the inspection, store it in the warehouse.

[0027] Next, further description is made on the preparation of the lower hoe plate in S100.

[0028] S21. Use 65# manganese steel strip as raw material. Then use a press to flatten the manganese steel strip and use a shearing machine to cut the manganese steel strip to the required size. S22. Place sodium nitrate and sodium nitrite in a heating and melting pool at a ratio of 50% each, and then heat to 280°C - 350°C. At the same time, heat the manganese steel sheet in a quenching furnace to 780°C - 850°C. Then place the manganese steel sheet at 780°C - 850°C in the molten solution of sodium nitrate and sodium nitrite in the heating and melting pool for chemical quenching. After quenching and soaking for 15 min - 20 min, take it out. Then heat the manganese steel strip in the quenching furnace to 780°C - 850°C for tempering, and then place it in the molten solution of sodium nitrate and sodium nitrite in the heating and melting pool for secondary chemical quenching. After quenching and soaking for 15 min - 20 min, take it out. The hardness of the taken-out manganese steel strip reaches 48º - 52º, and the lower hoe plate is initially formed. S23. Then use a grinding machine to evenly grind the lower edge of the initially formed lower hoe plate to form a uniformly ground lower edge. Then, use a press and a mold to extrude the ground lower hoe plate multiple times to finally form an arc shape, that is, to form a tile structure similar to a house. After passing the inspection, store it in the warehouse.

[0029] The butt welding between the upper hoe plate and the lower hoe plate in S200 will be further described below.

[0030] Align the lower edge of the upper hoe plate with the upper edge of the lower hoe plate, and then weld and fix them. After welding, grind the welding joint flat. Then, use a fine grinding wheel to finely grind and polish the welding joint and the welded hoe plate.

[0031] The preparation and installation of the hoe handle in S300 will be further described below.

[0032] When preparing the hoe handle, use a Q32 steel pipe as the raw material. Cut the steel pipe into steel pipe segments 1.2 m long with a sawing machine. Heat the pipe orifice at the lower end of the steel pipe segment, and then use an auxiliary mold to press it into the pipe orifice to expand the outer diameter of the pipe orifice into a flared shape. Then, put a rubber sleeve on the middle of the steel pipe segment, and put a tail sleeve on the tail of the steel pipe segment. After passing the inspection, store it in the warehouse.

[0033] When installing the hoe handle on the hoe plate, insert one end of the hoe handle into the hoe hole of the hoe cage formed in S14, then weld and fix it. Use a press to press a 15-cm-long wooden core into the flared orifice at the lower end of the hoe handle at the hoe cage. The wooden core expands the hoe handle to prevent the hoe handle from bending at the hoe cage when digging the ground.

[0034] The above embodiments only represent relatively preferred implementation modes, and their descriptions are relatively specific and detailed. However, it should not be construed as a limitation to the scope of the present invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A novel method for producing a round cage hoe with a handle, characterized in that: The following steps are involved: S100, hoe plate manufacturing, hoe plate includes upper hoe plate manufacturing and lower hoe plate manufacturing; The upper hoe plate manufacturing method includes: heating the steel block, taking it out and removing the oxide scale, and then forging the steel block with the oxide scale removed into an upper hoe plate structure of a certain shape by using a roll forging machine and a die; punching the upper hoe plate by using a press and a die to form a hoe cage structure, removing the scraps by using a punch and a die, and then forging and annealing by using a press and a die to form the upper hoe plate; The lower hoe plate forging: S21, flatten the 65# manganese steel strip with a press, and then cut it to a suitable size; S22, placing 50% of sodium nitrate and sodium nitrate in a heated melting pool, and heating to 280°C-350°C, and heating the manganese steel sheet to 780°C-850°C in a quenching furnace, and then placing the manganese steel sheet in the sodium nitrate and sodium nitrate melt in the melting pool for quenching, and the soaking quenching time is 15min-20min; then remove the manganese steel strip, place it in a quenching furnace for tempering at 780°C-850°C, and then place it in the sodium nitrate and sodium nitrate melt in the melting pool for soaking quenching for 15min-20min; after taking out the manganese steel strip, the hardness of the manganese steel strip reaches 48º-52º; S23, grinding the lower edge of the quenched manganese steel strip into a cutting edge with a grinder, and then pressing the manganese steel strip into an arc shape; S200, butting the lower edge of the upper hoe plate and the upper edge of the lower hoe plate together and then welding them.

2. A method for producing a new round cage hoe with a handle according to claim 1, characterized in that: It also includes the preparation of the S300 hoe handle: cutting the Q32 steel pipe into 1.2m long steel pipe sections, heating the pipe mouth at the lower end of the steel pipe section and expanding it into a trumpet shape, putting a middle rubber sleeve on the middle part of the steel pipe section and a frame-shaped tail rubber sleeve on the tail.

3. The method for producing a new round cage hoe with a handle according to claim 2 is characterized in that: When the hoe handle and the hoe plate are installed: the hoe handle is inserted into the hoe cage formed by punching holes in the hoe plate and welded and fixed, and then a 15-centimeter-long wooden core is pressed into the trumpet mouth at the lower end of the hoe handle at the hoe cage by a press to form a structure that increases the strength of the hoe handle at the hoe cage.

4. The method for producing a new round cage hoe with a handle according to claim 1 is characterized in that: The manufacturing of the upper hoe plate comprises the following steps: S11, first heat the steel block to 1350℃-1450℃; S12, taking out the heated steel block and removing the oxide scale; S13, placing it in a roll forging machine and forging it into an upper hoe plate with a certain curvature and a certain thickness using a die; S14, punching holes in the upper hoe plate near the upper edge with a punch press, and then further expanding the holes, so that the upper hoe plate forms a hoe cage structure near the upper edge; S15, using a punching machine and a die to cut off the scraps at the edges of the punched upper hoe plate to preliminarily form the upper hoe plate; S16, heating to 1050℃-1150℃ for forging, then heating to 850℃-950℃ in a tempering furnace and then automatically cooling and tempering; S17, after polishing, a finished product is formed.

5. The method for producing a new round cage hoe with a handle according to claim 4 is characterized in that: In the above-mentioned S11, the steel block is made of waste rails as raw materials, and the waste rails are cut into blocks.

6. The method for producing a new round cage hoe with a handle according to claim 5, characterized in that: In the S13, the steel block is placed in a 500-ton roll forging machine and a die is used to forge the upper hoe plate structure; and the upper hoe plate has a tile-like curvature, the thickness of the lower edge of the upper hoe plate is 2.5 cm, and the thickness of the upper edge is 4.5 cm, and the thickness gradually increases from the lower edge to the upper edge.

7. The method for producing a new round cage hoe with a handle according to claim 6 is characterized in that: In the above-mentioned S16, the initially formed upper hoe plate is heated to a temperature of 1050°C-1150°C, and then pressed into shape using a mold in a 300-ton press; it is then heated to 850°C to 950°C in a tempering furnace and automatically cooled for tempering, so that the upper hoe plate reaches the required strength.

8. The method for producing a new round cage hoe with a handle according to claim 3 is characterized in that: After the upper hoe plate and the lower hoe plate are welded, the welded portion is ground flat, and then the welded portion is finely ground.

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