A method for manufacturing a threshing concave plate for a grain harvester

Abstract

A method for manufacturing a threshing concave plate for a grain harvester greatly improves the success rate and efficiency of steel wire passing through the holes on the sieve plate during the manufacturing process by changing the manufacturing process sequence of the threshing concave plate, reduces the difficulty of threading, and makes the manufacturing process easy to realize automated production. The manufacturing process itself is novel and simple and easy to implement, and can realize the problem of synchronously punching the steel wire on the porous plate during the manufacturing process of the threshing concave plate, avoid interference between the steel wire and the holes on the sieve plate, and is easy to realize automated production. The method is efficient and convenient, can effectively reduce manual errors, greatly improve threading efficiency, reduce the production cycle of the product, and reduce the labor intensity of operators, and has high production application value.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural machinery equipment, in particular to a method for manufacturing a threshing concave plate for a threshing chamber of a grain harvester. Background Art

[0002] The threshing chamber is an important part of the grain harvester, and the threshing concave plate (attached Figure 1 The threshing machine is a functional part of the harvester. Its manufacturing quality and quality stability directly affect the threshing efficiency, threshing cleanliness, reliability of threshing parts and continuous harvesting time of the harvester. These performance indicators are the measure of the quality of the whole harvester.

[0003] At present, due to the irregular shape and variety of concave plates for grain harvesters (there are 5-6 types of concave plates for each model), the interlaced wire threading holes on the concave plates, and the complexity of wire assembly on the threshing concave plates, these unique process characteristics make the manufacturing process of threshing concave plates on domestic grain harvesters basically only use workers to manually thread the wire into the sieve plate. This makes the degree of automation in concave plate production extremely low, and wire threading needs to be completed entirely by manual labor. In high-yield months, many people are generally required to thread the wire, resulting in high labor costs, low production efficiency, and great labor intensity. Improving the efficiency of the threshing concave production process is an issue that needs to be urgently addressed.

[0004] like Figures 2~4 As shown in FIG. 1 , the threshing concave plate is composed of a middle partition plate, a lifting lug, a side plate, a sieve plate, a rear horizontal side plate, a steel wire, a front horizontal side plate, a front sealing plate and other parts. The traditional manufacturing process is: Step 1. First, the middle partition plate, the side plate, the sieve plate, the rear horizontal side plate, and the front horizontal side plate are pressed Figure 1 It is required to complete the combined welding to form the screen frame assembly; Step 2. Manually insert the steel wire into the hole on the screen plate; Step 3. Weld the ends of the steel wire to the two screen plates at the front and rear ends; Step 4. Weld the remaining parts such as the lifting lugs and the front sealing plate; Step 5. Clean the welding slag and inspect. In the entire manufacturing process, it is very inefficient to insert multiple steel wires into multiple screen plate holes. Generally, many people are required to perform the wire threading operation, resulting in high labor costs, low production efficiency, and great labor intensity.

[0005] During the process of manually threading the steel wire, there are multiple factors that prevent the steel wire from being smoothly inserted into the holes on the sieve plate. Factor 1: Since the design single-side gap between the hole on the sieve plate and the steel wire is generally between 0.25mm and 0.5mm, the shear cross-section of the steel wire is an irregular cross-section, and the hole and the steel wire sometimes interfere with each other during perforation; Factor 2: There are more than 20 holes on each sieve plate. Due to the poor manufacturing precision of the hole spacing, there is an error between the hole spacings, which makes it difficult for the steel wires to align with the holes on the sieve plate when multiple steel wires pass through one sieve plate at the same time and then pass through the next sieve plate, resulting in poor perforation; Factor 3: Since the pre-welded frame is arc-shaped and the steel wire is elastic, it is easy to cause the steel wire and the hole position on the sieve plate to be misaligned during perforation, resulting in interference in perforation.

[0006] The above factors make it impossible to successfully pass multiple steel wires through multiple screen plates, and manual correction is often required to complete the perforation operation, making it difficult to achieve automated production.

[0007] In view of this, in the manufacturing process of threshing concave plates, solving human interference and realizing automated production have become urgent issues to be solved. Summary of the invention

[0008] The technical purpose of the present invention is to provide a new manufacturing method for threshing concave plates for grain harvesters. This method creatively changes the traditional manual wire threading process with multiple obstacles under the arc frame structure after welding into an automated wire threading process with flat multi-sieve plates before frame welding, which effectively solves the problems of poor wire threading and low wire threading efficiency caused by many uncertain factors in the wire threading process of the original process, thereby greatly improving the production efficiency of the threshing concave plates, reducing the repair rate, reducing the labor intensity of operators, and saving productivity.

[0009] In order to solve the above technical problems, the technical solution adopted by the present invention is: a method for manufacturing a threshing concave plate for a grain harvester, comprising the following steps:

[0010] Step 1: straighten the disc-shaped raw steel wire through a straightening machine, then cut the raw steel wire according to the unfolded size of each working steel wire in the finished threshing concave plate, and then perform end processing on the obtained steel wire material so that both ends of each steel wire material are in a nail-pointed shape;

[0011] Step 2: according to the number of steel wires required to be used in the finished threshing concave plate, take a plurality of steel wires prepared in step 1, and then use a wire threading device to sequentially thread the plurality of steel wires into the threading holes of a plurality of sieve plates to prepare a grid-shaped sieve plate assembly for standby use;

[0012] Step 3, weld the front horizontal side plate and the rear horizontal side plate to the upper and lower ends of the sieve plate assembly obtained in step 2, respectively, so that the starting ends of all steel wires on the sieve plate assembly are welded to the front horizontal side plate, and the ending ends are welded to the rear horizontal side plate, to obtain a frame assembly for standby use;

[0013] Step 4: using a flexible bending mold to perform flexible bending deformation processing on the frame assembly obtained in step 3, so that the curvature radius of the steel wire on the frame assembly after demoulding is consistent with the curvature radius of the steel wire in the finished threshing concave plate;

[0014] Step 5, put the frame assembly after the flexible bending deformation treatment in step 4 into the welding jig, and press it to make the frame assembly fit with the welding jig, then weld a side plate on the left and right ends of the frame assembly respectively, and weld a lifting ear on each side plate, weld a middle partition plate in the middle of the frame assembly, and weld a front sealing plate between the front horizontal side plate and the sieve plate closest to the starting end of the steel wire in the frame assembly. After all welding is completed and cooled, take the obtained welded part out of the welding jig;

[0015] Step 6: Clean the surface welding slag of the welded part obtained in step 5, and then obtain the finished threshing concave plate after passing the inspection.

[0016] Preferably, in step one, the nail tips at both ends of each steel wire are in the shape of quadrangular pyramids.

[0017] Preferably, in step 2, the number of wire threading holes on each sieve plate is consistent with the number of steel wires threaded thereon.

[0018] Preferably, in step 4, after the flexible bending deformation treatment, the radius of curvature of the steel wire on the frame assembly is ±3% of the radius of curvature of the steel wire in the finished threshing concave plate.

[0019] Preferably, in step five, the middle partition is arranged between two side panels, and the middle partition and the side panels are arranged parallel to each other.

[0020] Preferably, the lifting ears on the two side panels are arranged symmetrically.

[0021] Beneficial effects of the present invention:

[0022] 1. The manufacturing method of a threshing concave plate for a grain harvester of the present invention greatly improves the success rate and efficiency of the steel wire passing through the holes on the sieve plate during the manufacturing process by changing the manufacturing process sequence of the threshing concave plate, reduces the difficulty of threading, and makes the manufacturing process easy to realize automated production. The manufacturing process itself is novel and simple and easy to implement, and can realize the problem of synchronously punching the steel wire on the porous plate during the manufacturing process of the threshing concave plate, avoid interference between the steel wire and the holes on the sieve plate, and is easy to realize automated production. The method is efficient and convenient, can effectively reduce manual errors, greatly improve threading efficiency, reduce the production cycle of the product, and reduce the labor intensity of the operator, and has a high production application value.

[0023] 2. Compared with the traditional manufacturing process, the present invention does not require manual tedious and high-intensity wire threading work in the entire manufacturing process, has a high degree of automation, and has good product quality. The manufacturing method of the threshing concave plate for grain harvesters of the present invention is easy to realize the automated production of the threshing concave plate of grain harvesters, and can gradually realize the automation, unmanned, and intelligentization of wire threading, welding, and grinding of the concave plate through intelligent and automated transformation, thereby improving the efficiency and quality of concave plate production, reducing labor costs and complete machine rate, and having important significance for improving corporate reputation and enhancing corporate vitality. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the threshing concave plate;

[0025] Figure 2 It is a schematic front view of the structure of the threshing concave plate;

[0026] Figure 3 for Figure 2 AA section view;

[0027] Figure 4 for Figure 3 Partial enlarged view of Ⅰ;

[0028] Figure 5 It is a structural schematic diagram of the frame assembly;

[0029] Figure 6 for Figure 5 AA section view;

[0030] Figure 7 for Figure 6 Ⅱ partial enlarged view;

[0031] Figure numerals: 1. middle partition; 2. lifting ear; 3. side plate; 4. sieve plate; 5. rear horizontal side plate; 6. steel wire; 7. front horizontal side plate; 8. front sealing plate. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement it with reference to the text of the specification. It should be noted that although the implementation steps of the present invention have been shown and described, it is understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the attached claims and their equivalents.

[0033] The present invention aims at the problem that in the manufacturing process of the threshing concave plate of the grain harvester in the prior art, the steel wire passes through the holes of the component sieve plate that has been welded into an assembly, and the steel wire cannot pass through the sieve plate smoothly due to reasons such as the hole position not being correct, and automated production cannot be realized, requiring a large amount of manual labor to thread the wire through the partition plate, resulting in low production efficiency and high labor intensity. By changing the existing manufacturing process method of the threshing concave plate, the sieve plate threading work can be carried out efficiently and conveniently, thereby improving the success rate and efficiency of the steel wire passing through the holes on the sieve plate during the manufacturing process, reducing the difficulty of threading the wire, and making the manufacturing process easy to realize automated production.

[0034] The general innovative process steps of the manufacturing method of the threshing concave provided by the present invention are:

[0035] 1) The steel wire is straightened from its original bending state, and the end of the steel wire is changed from free truncation to a conical pointed section;

[0036] 2) Before welding, the steel wire is automatically inserted into the screen plate hole through the wire threading device;

[0037] 3) Weld the two ends of the steel wire to the rear horizontal side plates and the front horizontal side plates on the outermost sides according to the requirements of the drawing;

[0038] 4) Perform flexible bending on the frame assembly after butt welding through a flexible bending mold;

[0039] 5) Fix the bent frame assembly on the welding jig and weld the remaining parts.

[0040] The process is novel, simple and easy to implement, and easy to automate production, and has good use value.

[0041] As shown in the figure, the specific operating process steps of the manufacturing method of a threshing concave plate for a grain harvester of the present invention are:

[0042] Step 1: Straighten the disc-shaped raw steel wire through a straightening machine, then cut and cut the raw steel wire according to the unfolded size of each working steel wire 6 in the finished threshing concave plate, and then perform end processing on the obtained steel wire material so that both ends of each steel wire material are "nail-tip-shaped", so that the steel wire 6 has good self-guiding properties when punching;

[0043] Step 2: according to the number of steel wires 6 required for the finished threshing concave plate, take a plurality of (≥10) steel wires straightened in step 1, and then use a wire threading device to sequentially thread the plurality of steel wires into the threading holes of the plurality of sieve plates 4 to obtain a grid-shaped sieve plate assembly for standby use;

[0044] Step 3: Weld the rear horizontal side plate 5 and the front horizontal side plate 7 to the upper and lower ends of the sieve plate assembly obtained in step 2, respectively, so that the starting ends of all steel wires 6 on the sieve plate assembly are welded to the front horizontal side plate 7, and the ending ends are welded to the rear horizontal side plate 5, so as to obtain a frame assembly, such as Figures 5 and 6 As shown;

[0045] Step 4: Use a flexible bending mold to perform flexible bending deformation treatment on the frame assembly obtained in step 3. The flexible bending mold can achieve bending greater than 180 degrees, so that the curvature radius of the steel wire 6 after demoulding is controlled within 3% of the design requirement, even if the curvature radius of the steel wire 6 on the frame assembly after demoulding is ±3% of the curvature radius of the steel wire 6 in the finished threshing concave plate;

[0046] Step 5: Place the frame assembly that has been subjected to the flexible bending deformation treatment in step 4 on the welding jig, and press it to fit the frame assembly with the welding jig. Then, weld a side plate 3 at the left and right ends of the frame assembly, weld a lifting ear 2 on each side plate 3, weld a middle partition plate 1 in the middle of the frame assembly, and weld a front sealing plate 8 between the front horizontal side plate 7 and the sieve plate 4 closest to the starting end of the steel wire 6 in the frame assembly. After all welding is completed and cooled, release the clamp and take the obtained welded part out of the welding jig.

[0047] Step 6: Clean the surface welding slag of the welded part obtained in step 5, and then obtain the finished threshing concave plate after passing the inspection.

[0048] in:

[0049] The "nail tip shape" described in step 1 is a quadrangular pyramid, see Figure 7 As shown, the cross section has good guiding properties, and it is easy to cut the steel wire 6 using a cutting die after it is straightened, and the manufacturing cost is low;

[0050] The wire threading device described in step 2 can realize the automation of the steel wire 6 punching, and can also control the spacing of the screen plate 4 after the wire threading is completed;

[0051] The flexible bending mold described in step 4 can wrap the frame assembly to perform arc bending. Since the steel wire 6 has a certain resilience, the bending radius of the flexible bending mold can also be adjusted within a certain range to ensure that the frame assembly can be bent to a desired curvature radius.

[0052] The present invention provides a method for manufacturing a threshing concave plate for a grain harvester, which solves the problem of perforating the perforated plate of the steel wire of the threshing concave plate of the grain harvester during the manufacturing process, avoids the problem of interference between the steel wire and the holes on the plate, and the method is simple and easy to implement, and is easy to automate production, and has high production application value. It can reduce manual errors, greatly improve wire threading efficiency, reduce the production cycle of the product, and reduce the labor intensity of operators.

[0053] The method for manufacturing the threshing concave plate assembly of a grain harvester described in the present invention is easy to realize the automated production of the sieve plates of the grain harvester. Through intelligent and automated transformation, the automation, unmanned and intelligentization of the wire threading, welding and grinding of the concave plates can be gradually realized, thereby improving the efficiency and quality of the concave plate production, reducing labor costs and the rate of complete machines, and is of great significance for improving the reputation of the enterprise and enhancing the vitality of the enterprise.

[0054] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without betraying the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A method for manufacturing a threshing concave plate for a grain harvester, characterized in that: The following steps are involved: Step 1: straighten the disc-shaped raw steel wire through a straightening machine, then cut the raw steel wire according to the unfolded size of each working steel wire in the finished threshing concave plate, and then perform end processing on the obtained steel wire material so that both ends of each steel wire material are in a nail-pointed shape; Step 2: according to the number of steel wires required to be used in the finished threshing concave plate, take a plurality of steel wires prepared in step 1, and then use a wire threading device to sequentially thread the plurality of steel wires into the threading holes of a plurality of sieve plates to prepare a grid-shaped sieve plate assembly for standby use; Step 3, respectively weld the rear horizontal side plate and the front horizontal side plate at the upper and lower ends of the screen plate assembly obtained in step 2, so that the starting ends of all steel wires on the screen plate assembly are welded to the front horizontal side plate, and the ending ends are welded to the rear horizontal side plate, to obtain a frame assembly for standby use; Step 4: using a flexible bending mold to perform flexible bending deformation processing on the frame assembly obtained in step 3, so that the curvature radius of the steel wire on the frame assembly after demoulding is consistent with the curvature radius of the steel wire in the finished threshing concave plate; Step 5, put the frame assembly after the flexible bending deformation treatment in step 4 into the welding jig, and press it to make the frame assembly fit with the welding jig, then weld a side plate on the left and right ends of the frame assembly respectively, and weld a lifting ear on each side plate, weld a middle partition plate in the middle of the frame assembly, and weld a front sealing plate between the front horizontal side plate and the sieve plate closest to the starting end of the steel wire in the frame assembly. After all welding is completed and cooled, take the obtained welded part out of the welding jig; Step 6: Clean the surface welding slag of the welded part obtained in step 5, and then obtain the finished threshing concave plate after passing the inspection.

2. The method for manufacturing a threshing concave plate for a grain harvester according to claim 1, characterized in that: In step one, the nail tips at both ends of each steel wire are in the shape of quadrangular pyramids.

3. The method for manufacturing a threshing concave plate for a grain harvester according to claim 1, characterized in that: In step 2, the number of wire holes on each sieve plate is consistent with the number of steel wires threaded thereon.

4. The method for manufacturing a threshing concave plate for a grain harvester according to claim 1, characterized in that: In step five, the middle partition is arranged between two side panels, and the middle partition and the side panels are arranged parallel to each other.

5. The method for manufacturing a threshing concave plate for a grain harvester according to claim 1, characterized in that: The hanging ears on the two side plates are arranged symmetrically.

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