A forming process for corn reel attachments

Abstract

The present invention relates to the field of chains, and specifically discloses a forming process for attachments of a corn threshing chain. The forming process uses a processing device, and the processing device includes a stamping device. The stamping device includes a stamping upper die and a stamping lower die. The stamping lower die includes a stamping die base and a positioning die core. A stamping female die cavity is provided on the stamping die base. The positioning die core is arranged in the stamping female die cavity and can move up and down relative to the stamping female die cavity. A first reset elastic member is provided between the positioning die core and the stamping die base. A first positioning protrusion is provided on the positioning die core. The stamping upper die includes a stamping punch corresponding to the stamping female die cavity. It at least includes steps of blanking, pre-positioning, and stamping forming. The above-mentioned forming process realizes positioning through the positioning holes on the blank, with higher forming accuracy and better use effect.

Description

Technical Field

[0001] The invention relates to the field of chains, and in particular to a molding process for corn plowing chain accessories. Background Art

[0002] Agricultural modernization refers to establishing agriculture on a modern scientific foundation, equipping it with modern science and technology and modern industry, and managing it with modern economic science. The goal is to create a high-yield, high-quality, low-consumption agricultural production system, and an agro-ecological system that rationally utilizes resources, protects the environment, and achieves high conversion efficiency. Modernizing production equipment is a crucial component of agricultural modernization, and agricultural harvesting equipment is one of the most common agricultural production equipment.

[0003] Corn harvesters are the primary equipment for harvesting corn, boasting a high degree of automation and efficient harvesting. The ear-breaking mechanism is a core component of a corn harvester, used to directional move and pluck corn plants. This mechanism typically includes a reed chain, which is used to directional move and gather the corn plants. Chinese invention patent application publication number CN 105684639A discloses a roller-type corn ear-breaking mechanism with a floating reed disc and chain combination, which describes the workings of the reed chain.

[0004] A corn plowing chain usually includes chain links and plowing teeth, wherein the plowing teeth include a groove plate and two side plates. The two side plates are arranged opposite to each other and are integrally formed with the groove plate. The two side plates respectively include a connecting portion, which is used to connect to the chain links. The plowing teeth are usually processed by stamping, that is, the blank is cut by punching, and the overall shape of the blank is used as a positioning reference, and the blank is formed by stamping. However, the overall precision requirements for punching are relatively low. With the overall shape as the positioning reference, the processing error during stamping is large. In production practice, the problem of difficulty in aligning the connecting parts of the two side plates is often encountered, which ultimately makes it difficult to assemble the plowing teeth and the chain links. After assembly, there will also be large internal stress, which affects the use effect. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a molding process for a corn plowing chain accessory, in which positioning is achieved through positioning holes on a blank, molding accuracy is higher, and use effect is better.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a forming process of a corn plowing chain accessory, using processing equipment, the processing equipment includes a stamping device,

[0007] The described stamping device includes an upper stamping die and a lower stamping die. The lower stamping die includes a stamping die base and a positioning die core. A stamping female die cavity is provided on the stamping die base. The positioning die core is arranged in the stamping female die cavity and can move up and down relative to the stamping female die cavity. A first reset elastic member is provided between the positioning die core and the stamping die base. A first positioning protrusion is provided on the positioning die core;

[0008] The upper stamping die includes a stamping punch corresponding to the stamping female die cavity;

[0009] It at least includes the following steps:

[0010] S1 Blanking, processing the blank of the corn reel attachment in the form of blanking by punching, and processing connection holes and stamping positioning holes on the blank while blanking by punching;

[0011] The connection holes are located in the area of the blank corresponding to the connection part, and the stamping positioning holes are located in the area of the blank corresponding to the groove plate;

[0012] S2 Pre-positioning, using the described stamping device, placing the blank on the lower stamping die, and aligning the stamping positioning holes with the first positioning protrusions;

[0013] S3 Stamping and forming, using an external power to drive the upper stamping die to move towards the lower stamping die, and the blank is formed under the combined action of the stamping punch and the stamping female die cavity.

[0014] Compared with the existing forming process, the forming process of the present application takes the stamping positioning holes as the positioning reference. Only by ensuring the positional accuracy between the connection holes and the stamping positioning holes in the blanking step can the alignment accuracy between the connection holes on the two connection parts after forming be effectively ensured, avoiding the problem of difficult assembly in the subsequent assembly process and improving the product quality.

[0015] Preferably, the first positioning protrusion is cylindrical, and the diameter of the stamping positioning hole on the blank is 0.03 - 0.06 mm larger than the diameter of the first positioning protrusion.

[0016] Preferably, the stamping punch is provided with first accommodation holes corresponding to the first positioning protrusions one by one, and the diameter of the first accommodation holes is 0.05 - 0.1 mm larger than the diameter of the first positioning protrusions.

[0017] Preferably, the stamping female die cavity includes a front forming surface, a rear forming surface and two side forming surfaces. The two side forming surfaces are arranged oppositely and both extend in the vertical direction. One end of each of the two side forming surfaces is connected to the front forming surface respectively, and the other end is connected to the rear forming surface respectively; the two side forming surfaces are arranged obliquely relative to each other, and the distance between the two side forming surfaces gradually increases from the front forming surface to the rear forming surface;

[0018] The described processing equipment further includes a bending device, which includes an upper bending die and a lower bending die. The lower bending die includes a lower bending die base and a movable forming block. The lower bending die base is provided with a first bending forming inclined surface that is inclined relative to the horizontal plane;

[0019] The movable forming block is movably connected to the lower bending die in the vertical direction, and a second reset elastic member is provided between the movable forming block and the lower bending die; the movable forming block is provided with a first bending forming plane, and a second positioning protrusion is provided on the first bending forming plane;

[0020] The upper bending die includes a bending punch. The bending punch is provided with a second bending forming plane corresponding to the first bending forming plane and a second bending forming inclined surface corresponding to the first bending forming inclined surface;

[0021] Between step S1 and step S2, at least the following steps are further included:

[0022] S11 Pre-positioning: Place the blank on the lower bending die, and align the connection hole corresponding to one of the connecting parts on the blank with the second positioning protrusion;

[0023] S12 First bending forming: Use an external power to drive the upper bending die to move towards the lower bending die until the part of the blank corresponding to the groove plate fits against the first bending forming inclined surface;

[0024] S13 Pre-positioning: Adjust the position of the blank until the connection hole corresponding to the other connecting part on the blank is aligned with the second positioning protrusion;

[0025] S14 Second bending forming: Use an external power to drive the upper bending die to move towards the lower bending die until the part of the blank corresponding to the groove plate fits against the first bending forming inclined surface again.

[0026] Through the bending operation of the connecting part, a new structure of the corn reel chain accessory can be processed. The two side plates of the new structure of the corn reel chain accessory are inclined, which can better cut the corn plants during the corn harvesting process.

[0027] The processing technology of first bending the connecting part and then forming the whole can greatly reduce the difficulty of bending and forming the connecting part, and at the same time ensure the position accuracy between the two connecting parts.

[0028] Preferably, the second positioning protrusion is cylindrical, and the diameter of the connection hole is 0.03 - 0.06 mm larger than the diameter of the second positioning protrusion.

[0029] Preferably, the bending punch is provided with second accommodation holes corresponding to the second positioning convex portions one by one, and the diameter of the second accommodation holes is 0.05-0.1 mm larger than the diameter of the second positioning convex portions.

[0030] Preferably, the bending lower die is provided with a pre-positioning plane, and the first bending forming inclined plane is arranged in a form of inclining downward relative to the pre-positioning plane; in the natural state, the first bending forming plane is flush with the pre-positioning plane.

[0031] In steps S11 and S13, the first bending forming plane and the pre-positioning plane simultaneously position and support the blank, ensuring that the blank is stably and accurately arranged on the bending lower die, and further ensuring the bending processing accuracy.

[0032] Preferably, the lower die base includes a fixed seat and a fixed forming block, and the fixed seat and the fixed forming block are separately arranged; an installation groove is provided on the fixed seat, the fixed forming block is arranged in the installation groove, and the first bending forming inclined plane is arranged on the fixed forming block.

[0033] The fixed forming block can be adjusted and replaced according to products of different models to adapt to more product types. At the same time, the fixed forming block and the movable forming block can be conveniently replaced to maintain the bending device.

[0034] Preferably, the number of the fixed forming blocks is two; the movable forming block is arranged between the two fixed forming blocks, and the two fixed forming blocks are symmetrically arranged left and right with respect to the movable forming block.

[0035] The bending operations of two blanks can be carried out simultaneously, improving the processing efficiency.

[0036] Preferably, a clamping component is arranged between the fixed forming block and the fixed seat, and the clamping component includes a clamping groove and a clamping block, and one of the clamping groove and the clamping block is arranged on the fixed forming block, and the other is arranged on the side surface of the installation groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a working state diagram of the bending device adopted by the forming process of the corn reel chain accessory in this embodiment;

[0038] Figure 2 It is a structural schematic diagram of the bending device adopted by the forming process of the corn reel chain accessory in this embodiment;

[0039] Figure 3 It is a cross-sectional view of the bending device adopted by the forming process of the corn reel chain accessory in this embodiment;

[0040] Figure 4Explosion diagram of the bending lower die in the bending device adopted by the forming process of the corn reel attachment in this embodiment;

[0041] Figure 5 Schematic structural diagram of the bending upper die in the bending device adopted by the forming process of the corn reel attachment in this embodiment;

[0042] Figure 6 Schematic structural diagram of the stamping device adopted by the forming process of the corn reel attachment in this embodiment;

[0043] Figure 7 Cross-sectional view of the stamping device adopted by the forming process of the corn reel attachment in this embodiment;

[0044] Figure 8 Schematic structural diagram of the stamping upper die in the stamping device adopted by the forming process of the corn reel attachment in this embodiment;

[0045] Figure 9 Schematic structural diagram of the stamping lower die in the stamping device adopted by the forming process of the corn reel attachment in this embodiment;

[0046] Figure 10 Flow chart of the forming process of the corn reel attachment in this embodiment. Detailed implementation manners

[0047] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Embodiment

[0048] A forming process for a corn reel attachment, using a processing device, and the processing device includes a stamping device and a bending device.

[0049] As Figure 6 and Figure 7 shown, the stamping device therein includes a stamping upper die 4 and a stamping lower die 5. The stamping lower die 5 includes a stamping die base 52 and a positioning die core 51. A stamping concave die cavity is provided on the stamping die base 52. The positioning die core 51 is arranged in the stamping concave die cavity and can move up and down relative to the stamping concave die cavity. A first reset elastic member 53 is provided between the positioning die core 51 and the stamping die base 52; a first positioning convex portion 511 is provided on the positioning die core 51. As Figure 8 shown, the stamping upper die 4 includes a stamping convex die 41 corresponding to the stamping concave die cavity.

[0050] Specifically, the first positioning protrusion 511 is cylindrical, and the diameter of the stamping positioning hole on the blank is 0.03 - 0.06 mm larger than the diameter of the first positioning protrusion 511. The stamping punch 41 is provided with first accommodating holes 411 corresponding to the first positioning protrusions 511 one by one, and the diameter of the first accommodating holes 411 is 0.05 - 0.1 mm larger than the diameter of the first positioning protrusions 511.

[0051] Further, as Figure 9 shown, the stamping die cavity includes a front forming surface 55, a rear forming surface 54 and two side forming surfaces 56. The two side forming surfaces 56 are arranged oppositely and both extend in the vertical direction. One ends of the two side forming surfaces 56 are respectively connected to the front forming surface 55, and the other ends are respectively connected to the rear forming surface 54. The two side forming surfaces 56 are arranged obliquely relative to each other, and the distance between the two side forming surfaces 56 gradually increases from the front forming surface 55 to the rear forming surface 54.

[0052] As Figure 1 and Figure 2 shown, the bending device includes a bending upper die 1 and a bending lower die 2. The bending lower die 2 includes a bending lower die base 21 and a movable forming block 22. As Figure 4 shown, the bending lower die base 21 is provided with a first bending forming inclined surface 212 that is inclined relative to the horizontal plane.

[0053] As Figure 3 and Figure 4 shown, the movable forming block 22 is movably connected to the bending lower die 2 in the vertical direction, and a second reset elastic member 23 is provided between the movable forming block 22 and the bending lower die 2; the movable forming block 22 is provided with a first bending forming plane 221, and a second positioning protrusion 222 is provided on the first bending forming plane 221.

[0054] As Figure 5 shown, the bending upper die 1 includes a bending punch 11. The bending punch 11 is provided with a second bending forming plane 112 corresponding to the first bending forming plane 221, and a second bending forming inclined surface 111 corresponding to the first bending forming inclined surface 212;

[0055] Specifically, the second positioning protrusion 222 is cylindrical, and the diameter of the connecting hole 32 is 0.03 - 0.06 mm larger than the diameter of the second positioning protrusion 222. The bending punch 11 is provided with second accommodating holes 113 corresponding to the second positioning protrusions 222 one by one, and the diameter of the second accommodating holes 113 is 0.05 - 0.1 mm larger than the diameter of the second positioning protrusions 222.

[0056] As Figure 10As shown, the forming process of the corn header chain attachment includes at least the following steps:

[0057] S1 Blanking, processing the blank 3 of the corn header chain attachment in the form of blanking by punching, and processing the connecting hole 32 and the stamping positioning hole 31 on the blank 3 while blanking by punching;

[0058] The connecting hole 32 therein is located in the area corresponding to the connecting part on the blank 3, and the stamping positioning hole 31 is located in the area corresponding to the groove plate on the blank 3. That is, in the state shown in part A of Figure 10 as follows.

[0059] S11 Pre-positioning, placing the blank on the bending lower die 2, and aligning the connecting hole 32 corresponding to one of the connecting parts on the blank with the second positioning protrusion 222.

[0060] S12 First bending forming, using an external power to drive the bending upper die 1 to move towards the bending lower die 2 until the part corresponding to the groove plate on the blank fits against the first bending forming inclined surface 212. That is, in the state shown in part B of Figure 10 as follows.

[0061] S13 Pre-positioning, adjusting the position of the blank until the connecting hole 32 corresponding to the other connecting part on the blank is aligned with the second positioning protrusion 222.

[0062] S14 Second bending forming, using an external power to drive the bending upper die 1 to move towards the bending lower die 2 until the part corresponding to the groove plate on the blank fits against the first bending forming inclined surface 212 again. That is, in the state shown in part C of Figure 10 as follows.

[0063] S2 Pre-positioning, using the described stamping device, placing the blank on the stamping lower die 5, and aligning the stamping positioning hole 31 therein with the first positioning protrusion 511.

[0064] S3 Stamping forming, using an external power to drive the stamping upper die 4 to move towards the stamping lower die 5, and the blank is formed under the combined action of the stamping punch 41 and the stamping die cavity. That is, in the state shown in part D of Figure 10 as follows.

[0065] Compared with the existing forming process, the forming process of the present application takes the stamping positioning hole 31 as the positioning reference. Only by ensuring the positional accuracy between the connecting hole 32 and the stamping positioning hole 31 in the blanking step can the alignment accuracy between the connecting holes 32 on the two connecting parts after forming be effectively ensured, avoiding the problem of difficult assembly in the subsequent assembly process and improving the product quality.

[0066] By performing a bending operation on the connecting part, a new type of corn reel attachment with a novel structure can be processed. The two side plates of the new type of corn reel attachment are inclined, which can better cut corn plants during the corn harvesting process.

[0067] Adopting the processing technology of first bending the connecting part and then integrally forming can greatly reduce the difficulty of bending and forming the connecting part, and at the same time ensure the positional accuracy between the two connecting parts.

[0068] Furthermore, as Figure 3 and Figure 4 shown, a pre-positioning plane 213 is provided on the bending lower die 2, and the first bending and forming inclined plane 212 is arranged in a form inclined downward relative to the pre-positioning plane 213. In the natural state, the first bending and forming plane 221 is flush with the pre-positioning plane 213.

[0069] In steps S11 and S13, the first bending and forming plane 221 and the pre-positioning plane 213 simultaneously position and support the blank, ensuring that the blank is stably and accurately arranged on the bending lower die 2, and further ensuring the bending processing accuracy.

[0070] Furthermore, as Figure 3 and Figure 4 shown, the lower die base includes a fixed seat and a fixed forming block 211, and the fixed seat and the fixed forming block 211 are separately arranged. An installation groove is provided on the fixed seat, the fixed forming block 211 is arranged in the installation groove, and the first bending and forming inclined plane 212 is arranged on the fixed forming block 211.

[0071] The fixed forming block 211 can be adjusted and replaced according to different product models to adapt to more product types. At the same time, the fixed forming block 211 and the movable forming block 22 can also be conveniently replaced to maintain the bending device.

[0072] Specifically, as Figure 3 and Figure 4 shown, the number of the fixed forming blocks 211 is two. The movable forming block 22 is arranged between the two fixed forming blocks 211, and the two fixed forming blocks 211 are symmetrically arranged with respect to the movable forming block 22 left and right. The bending operation of two blanks can be carried out simultaneously to improve the processing efficiency.

[0073] Specifically, as Figure 3 and Figure 4 shown, a clamping component is provided between the fixed forming block 211 and the fixed seat. The clamping component includes a clamping groove and a clamping block, and one of the clamping groove and the clamping block is arranged on the fixed forming block 211, and the other is arranged on the side of the installation groove.

[0074] In summary, the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A forming process for a corn reel attachment, characterized in that, An processing device is adopted, and the processing device includes a stamping device. The stamping device includes an upper stamping die and a lower stamping die. The lower stamping die includes a stamping die base and a positioning die core. A stamping concave die cavity is provided on the stamping die base. The positioning die core is arranged in the stamping concave die cavity and can move up and down relative to the stamping concave die cavity. A first reset elastic member is provided between the positioning die core and the stamping die base. A first positioning protrusion is provided on the positioning die core. The upper stamping die includes a stamping punch corresponding to the stamping concave die cavity. The stamping concave die cavity includes a front forming surface, a rear forming surface and two side forming surfaces. The two side forming surfaces are arranged oppositely and both extend in the vertical direction. One ends of the two side forming surfaces are respectively connected to the front forming surface, and the other ends are respectively connected to the rear forming surface. The two side forming surfaces are arranged obliquely oppositely, and the distance between the two side forming surfaces gradually increases from the front forming surface to the rear forming surface. The processing device further includes a bending device. The bending device includes an upper bending die and a lower bending die. The lower bending die includes a lower bending die base and a movable forming block. A first bending forming inclined surface inclined relative to the horizontal plane is provided on the lower bending die base. The movable forming block is movably connected to the lower bending die in the vertical direction, and a second reset elastic member is provided between the movable forming block and the lower bending die. A first bending forming plane is provided on the movable forming block, and a second positioning protrusion is provided on the first bending forming plane. The upper bending die includes a bending punch. A second bending forming plane corresponding to the first bending forming plane and a second bending forming inclined surface corresponding to the first bending forming inclined surface are provided on the bending punch. It at least includes the following steps: S1 Blanking, processing the blank of the corn reel attachment in the form of blanking by punching, and processing connection holes and stamping positioning holes on the blank while blanking by punching. The connection holes are located in the area of the blank corresponding to the connection part, and the stamping positioning holes are located in the area of the blank corresponding to the slot plate. S11 Pre-positioning, placing the blank on the lower bending die, and aligning the connection hole corresponding to one of the connection parts on the blank with the second positioning protrusion. S12 Primary bending forming, using an external power to drive the upper bending die to move towards the lower bending die until the part of the blank corresponding to the slot plate fits against the first bending forming inclined surface. S13 Pre-positioning, adjusting the position of the blank until the connection hole corresponding to the other connection part on the blank is aligned with the second positioning protrusion. S14 Secondary bending forming, using an external power to drive the upper bending die to move towards the lower bending die until the part of the blank corresponding to the slot plate fits against the first bending forming inclined surface again. S2 Pre-positioning, using the stamping device, placing the blank on the lower stamping die, and aligning the stamping positioning hole with the first positioning protrusion. S3 Stamping forming, using an external power to drive the upper stamping die to move towards the lower stamping die, and the blank is formed under the cooperation of the stamping punch and the stamping concave die cavity.

2. The shaping process according to claim 1, characterized in that: The first positioning protrusion is cylindrical, and the diameter of the stamping positioning hole on the blank is 0.03 - 0.06 mm larger than the diameter of the first positioning protrusion.

3. The forming process according to claim 2, characterized in that: The described stamping punch is provided with first accommodating holes corresponding to the first positioning convex portions one by one, and the diameter of the first accommodating holes is 0.05 - 0.1 mm larger than the diameter of the first positioning convex portions.

4. The molding process according to claim 1, characterized in that: The described second positioning convex portion is cylindrical, and the diameter of the connecting hole is 0.03 - 0.06 mm larger than the diameter of the second positioning convex portion.

5. The forming process according to claim 4, characterized in that: The described bending punch is provided with second accommodating holes corresponding to the second positioning convex portions one by one, and the diameter of the second accommodating holes is 0.05 - 0.1 mm larger than the diameter of the second positioning convex portions.

6. The shaping process according to claim 1, characterized in that: The described bending die base is provided with a pre-positioning plane, and the first bending and forming inclined plane is arranged in a form of inclining downward relative to the pre-positioning plane; In the natural state, the first bending and forming plane is flush with the pre-positioning plane.

7. The shaping process according to claim 1, characterized in that: The described die base includes a fixed seat and a fixed forming block, and the fixed seat and the fixed forming block are separately arranged; an installation groove is provided on the fixed seat, the fixed forming block is arranged in the installation groove, and the first bending and forming inclined plane is arranged on the fixed forming block.

8. The shaping process according to claim 7, characterized in that: The number of the described fixed forming blocks is two; the movable forming block is arranged between the two fixed forming blocks, and the two fixed forming blocks are symmetrically arranged left and right with respect to the movable forming block.

9. The shaping process according to claim 7 or 8, characterized in that: A clamping component is arranged between the fixed forming block and the fixed seat, and the clamping component includes a clamping groove and a clamping block, and one of the clamping groove and the clamping block is arranged on the fixed forming block, and the other is arranged on the side surface of the installation groove.

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