Stamping die, stamping method and exhaust fume collecting hood

Abstract

The invention relates to the technical field of range hoods, and discloses a stamping die, a stamping method and an exhaust fume collecting hood. Wherein the stamping die is used for machining a through hole structure on a special-shaped workpiece, a first bearing plane of a lower die of the stamping die is used for bearing a first plate, and a second bearing plane is downwards inclined relative to the first bearing plane and is used for bearing a second plate; the groove top of the cutting groove of the lower die can be supported on the first plate and the second plate; a punch of the upper die can move along with the upper die in the vertical direction perpendicular to the first bearing plane so as to be close to the lower die, the portion, corresponding to the first bearing plane, of the punch is lower than the portion, corresponding to the second bearing plane, of the punch, and when the punch moves downwards to the lowest point, the portion, corresponding to the first bearing plane, of the punch can be arranged in the cutting groove in a penetrating mode. The part corresponding to the second bearing plane and the part far away from the first bearing plane do not penetrate through the cutting groove to form a through hole structure. The structure is relatively simple, and the machining efficiency can be effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of range hoods, and in particular to a stamping die, a stamping method and a fume collecting hood. Background Art

[0002] Some range hoods feature oil drain holes on the curved surface of the smoke guide plate, and an oil shield corresponding to the holes is installed on the back of the plate. Because the curved surface primarily consists of two plates arranged at an angle, the existing processing method is stamping. First, a hole is punched into one side of the curved surface of the sheet material, and then the other side is stamped, retaining the punched-out portion of the sheet material to form the oil shield. This stamping process requires two stamping steps, and the stamping die required for this process is relatively complex. Summary of the Invention

[0003] One of the technical problems solved by the present invention is to provide a processing tool for a through-hole structure on a special-shaped workpiece, which has a relatively simple structure and can effectively improve the processing efficiency.

[0004] The second technical problem solved by the present invention is to provide a smoke collecting hood which can effectively solve the problem of low processing efficiency and improve the processing efficiency.

[0005] The third technical problem solved by the present invention is to provide a range hood that can effectively solve the problem of low processing efficiency, has higher cost performance and better market competitiveness.

[0006] The first technical problem mentioned above is solved by the following technical solution:

[0007] A stamping die is used to process a through-hole structure on a special-shaped workpiece. The special-shaped workpiece includes a first plate and a second plate connected to each other and arranged at an angle. The through-hole structure includes through holes located in the first plate and the second plate, and a bent piece connected to the second plate and located on one side of the special-shaped workpiece. The stamping die includes a lower die and an upper die:

[0008] The lower die is provided with a first bearing plane and a second bearing plane; the first bearing plane is arranged horizontally for bearing the first plate; the second bearing plane is arranged downwardly inclined relative to the first bearing plane for bearing the second plate; the lower die is provided with a cutting groove, the top of which can support the first plate and the second plate;

[0009] The upper die is arranged above the lower die, and the upper die includes a punch, which moves along the upper and lower directions with the upper die to approach the lower die; the part of the punch corresponding to the first bearing plane is lower than the part corresponding to the second bearing plane; when the punch moves downward to the lowest point, the part corresponding to the first bearing plane can be passed through the cutting groove, the part corresponding to the second bearing plane and close to the first bearing plane can be passed through the cutting groove, and the part corresponding to the second bearing plane and away from the first bearing plane is not passed through the cutting groove.

[0010] Compared with the background technology, the punching method of the present invention has the following beneficial effects:

[0011] The stamping die of the present invention is used to form a through-hole structure extending simultaneously to a first plate and a second plate on a special-shaped workpiece. During processing, the first plate of the special-shaped workpiece is placed on the first supporting plane of the lower die, and the second plate is placed on the second supporting plane, providing more stable placement and more reliable support. The lower die is provided with a cutting groove, the top of which can support the first and second plates of the special-shaped workpiece. Simultaneously, the upper die is provided with a punch, which spans the first and second supporting planes. As the upper die drives the punch downward in the vertical direction, because the vertical direction is perpendicular to the horizontal direction of the first supporting plane, and the second supporting plane is tilted downward relative to the first supporting plane, and because the portion of the punch corresponding to the first supporting plane is lower than the portion corresponding to the second supporting plane, the portion of the punch corresponding to the first supporting plane first contacts the first plate, forming a portion of the through-hole structure on the first plate. As the punch continues to move downward, gradually cutting the plate, the portion corresponding to the first supporting plane can penetrate the cutting groove, and the portion corresponding to the second supporting plane and adjacent to the first supporting plane can penetrate the cutting groove. Therefore, this portion of the punch forms the through-hole portion of the through-hole structure. At the same time, when the upper die moves downward to the lowest point of the punch, the portion of the punch corresponding to the second bearing plane and away from the corresponding first bearing plane is not provided in the cutting groove, so that the plate retaining portion is connected to the second plate. It can be understood that the portion of the plate at the punching position away from the first plate is connected to the second plate to form a bent sheet portion of the through-hole structure. Except for the above-mentioned connection position, the plate is separated from the special-shaped workpiece, thereby forming a complete through-hole structure. In the above-mentioned processing process, only one downward movement of the upper die is required to realize the processing of the through-hole structure. Compared with the two stamping processes in the prior art, there are fewer steps and higher efficiency. At the same time, the structure of the stamping die is simpler and the cost is lower. In addition, the above-mentioned processing method does not produce any waste.

[0012] In one embodiment, a shaping groove is provided at one end of the punch close to the lower die to form a preset curvature on the bent piece.

[0013] In one embodiment, the lower die is provided with a shaping protrusion, and the shaping protrusion is provided corresponding to the shaping groove, and when the part of the punch corresponding to the first bearing plane is inserted into the cutting groove, a shaping space is formed between the shaping protrusion and the shaping groove.

[0014] In one embodiment, the minimum distance of the shaping space along a direction perpendicular to the first bearing plane is greater than the thickness of the bent sheet.

[0015] In one embodiment, a cutting plane parallel to the first bearing plane is provided on a side of the punch close to the first bearing plane.

[0016] In one embodiment, the width of the punch on a side close to the first bearing plane is smaller than the width of the punch on a side close to the second bearing plane.

[0017] In one embodiment, the upper mold is provided with a positioning mold, and the positioning mold is provided with a first positioning plane and a through-hole. The first positioning plane is arranged corresponding to the first bearing plane in a direction perpendicular to the first bearing plane. The punch is provided in the through-hole and can be protruded from the through-hole to cut the special-shaped workpiece.

[0018] In one embodiment, the positioning die and the upper die are floatingly arranged so that when the upper die moves away from the lower die, the punch retracts into the perforation.

[0019] In one embodiment, the lower die is floatingly provided with an ejector pin, and the ejector pin has an initial position protruding from the lower die and a working position retracted into the lower die.

[0020] In one embodiment, the lower die is provided with a plurality of cutting grooves, and the punches are provided with a plurality of punches, and the plurality of cutting grooves are provided in a one-to-one correspondence with the plurality of punches.

[0021] The second technical problem mentioned above is solved by the following technical solution:

[0022] A stamping method, using the stamping die described in any of the above solutions to process a through-hole structure on a special-shaped workpiece, the stamping method comprising:

[0023] placing the first plate on the first supporting plane and the second plate on the second supporting plane;

[0024] The upper die is controlled to move close to the lower die, and the punch cuts the first plate and the second plate in sequence until the punch at least partially penetrates the cutting groove and at least partially does not penetrate the cutting groove, so as to keep at least part of the plate connected to the second plate, thereby forming the through-hole structure.

[0025] Compared with the background technology, the stamping method described in the present invention has the following beneficial effects: in the above-mentioned stamping method, the upper die only needs to move close to the lower die once, which improves the processing efficiency; at the same time, the stamping die structure is simpler, which makes the cost lower.

[0026] The third technical problem mentioned above is solved by the following technical solution:

[0027] A smoke collecting hood is provided with a smoke guide plate, the smoke guide plate includes a mounting plate and a top plate, and a connecting plate arranged between the mounting plate and the top plate, the connecting plate and the mounting plate are arranged at an angle, and an oil leakage hole is provided at the bending point between the two, and the oil leakage hole is made by the stamping method described in any of the above schemes.

[0028] Compared with the background technology, the smoke hood of the present invention has the following beneficial effects:

[0029] The smoke guide plate of the smoke hood of the present invention is provided with an oil leakage hole, and the oil leakage hole is arranged at the connection between the connecting plate and the mounting plate. The processing method of the oil leakage hole is simpler, more efficient, and lower in cost. The processed oil leakage hole has fewer burrs on the edge, making the smoke guide plate higher in quality and more aesthetically pleasing. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without any creative work.

[0031] Figure 1 Schematic diagram of a stamping die provided by a specific embodiment of the present invention;

[0032] Figure 2 yes Figure 1 A partial enlarged schematic diagram of point I in the middle;

[0033] Figure 3 This is a schematic diagram of a stamping die provided by a specific embodiment of the present invention after placing a special-shaped workpiece;

[0034] Figure 4 This is a schematic diagram of a stamping die provided by a specific embodiment of the present invention after processing a through hole in a special-shaped workpiece;

[0035] Figure 5 Schematic diagram of the lower die of the stamping die provided in a specific embodiment of the present invention;

[0036] Figure 6Schematic diagram of the upper die of the stamping die provided by the specific embodiment of the present invention when the punch is not protruding from the positioning die;

[0037] Figure 7 Schematic diagram of the upper die when the punch of the stamping die provided by the specific embodiment of the present invention is convexly arranged on the positioning die;

[0038] Figure 8 Schematic diagram of the placement of a special-shaped workpiece in a stamping die provided by a specific embodiment of the present invention;

[0039] Figure 9 Schematic diagram of the cooperation between the punch and the lower die of the stamping die provided in a specific embodiment of the present invention;

[0040] Figure 10 is a top view of a punch of a stamping die provided in a specific embodiment of the present invention;

[0041] Figure 11 Schematic diagram of a smoke guide plate of a smoke collection hood provided in a specific embodiment of the present invention;

[0042] Figure 12 is a schematic diagram of a smoke collection hood provided in a specific embodiment of the present invention;

[0043] Figure 13 It is a side view of a fume hood and a schematic diagram of oil flow provided by a specific embodiment of the present invention;

[0044] Figure 14 yes Figure 13 A local enlarged schematic diagram of point A in the middle.

[0045] Description of labels:

[0046] 1. Special-shaped workpiece; 11. First plate; 12. Second plate; 13. Through hole;

[0047] 2. Upper die; 21. Punch; 22. Shaping groove; 221. Fitting plane; 222. Cutting plane; 23. Positioning die; 24. First positioning plane; 25. Perforation; 26. Second positioning plane;

[0048] 3. Lower die; 31. Cutting groove; 32. First bearing plane; 33. Second bearing plane; 36. Shaping protrusion; 37. Ejector pin;

[0049] 100, smoke guide plate; 110, mounting plate; 120, top plate; 130, connecting plate; 140, oil leakage hole; 141, bent piece;

[0050] 200. Fume hood; 210. Front panel. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0052] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0053] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0054] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0055] In the prior art, punching holes on arc-shaped surfaces usually requires two stamping processes, which not only involves many steps and is inefficient, but also makes the mold more complex and the cost higher.

[0056] like Figures 1-10As shown, this embodiment provides a stamping method for processing a through-hole structure on a special-shaped workpiece 1, wherein the special-shaped workpiece 1 includes a first plate 11 and a second plate 12 connected to each other and arranged at an angle, and the through-hole structure includes a through-hole 13 located in the first plate 11 and the second plate 12, and a bent piece 141 connected to the second plate 12 and located on one side of the special-shaped workpiece 1. For example, the above-mentioned special-shaped workpiece 1 can be a smoke guide plate 100, that is, the above-mentioned processing method can be used to process a through-hole on the smoke guide plate 100 as an oil leakage hole 140. It can effectively solve the problems of high mold cost, short life and inconvenient processing, and the processing is more convenient, and the mold is simpler, lower in cost and longer in life.

[0057] Specifically, the stamping die includes a lower die 3 and an upper die 2. The lower die 3 is provided with a first bearing plane 32 and a second bearing plane 33. The first bearing plane 32 is used to bear the first plate 11. The second bearing plane 33 is tilted downward relative to the first bearing plane 32 to bear the second plate 12. The lower die 3 is provided with a cutting groove 31. The groove top of the cutting groove 31 can support the first plate 11 and the second plate 12. The upper die 2 is provided above the lower die 3. The upper die 2 includes a punch 21. The punch 21 can follow the upper die 2 along the first bearing plane. The plane 32 moves vertically in the up and down directions to approach the lower die 3; the portion of the punch 21 corresponding to the first bearing plane 32 is lower than the portion corresponding to the second bearing plane 33. When the punch 21 moves downward to the lowest point, the portion corresponding to the first bearing plane 32 can be passed through the cutting groove 31, the portion corresponding to the second bearing plane 33 and close to the corresponding first bearing plane 32 can be passed through the cutting groove 31, and the portion corresponding to the second bearing plane 33 and away from the corresponding first bearing plane 32 is not passed through the cutting groove 31.

[0058] The stamping die is used to produce through-hole structures on a shaped workpiece 1 that extend simultaneously to the first and second plates 11, 12. During processing, the first plate 11 of the shaped workpiece 1 is placed on the first support plane 32 of the lower die 3, and the second plate 12 is placed on the second support plane 33, providing more stable placement and reliable support. The lower die 3 is provided with a cutting groove 31, the top of which can support the first and second plates 11, 12 of the shaped workpiece 1. Simultaneously, the upper die 2 is provided with a punch 21 that spans the first and second support planes 32, 33. During the process of the upper die 2 driving the punch 21 to move downward along the up-down direction, since the up-down direction is perpendicular to the horizontal direction of the first bearing plane 32, and the second bearing plane 33 is tilted downward relative to the first bearing plane 32; at the same time, the part of the punch 21 corresponding to the first bearing plane 32 is lower than the part corresponding to the second bearing plane 33, therefore, the part of the punch 21 corresponding to the first bearing plane 32 first contacts the first plate 11 and forms a partial structure of the through hole 13 on the first plate 11; when the punch 21 continues to move downward to gradually cut the plate, and since the part corresponding to the first bearing plane 32 can be passed through the cutting groove 31, the part corresponding to the second bearing plane 33 and the part close to the corresponding first bearing plane 32 can be passed through the cutting groove 31, therefore, this part of the punch 21 is used to form the through hole part of the through hole structure. At the same time, when the upper die 2 moves downward to the lowest point of the punch 21, the portion of the punch 21 corresponding to the second bearing plane 33 and away from the corresponding first bearing plane 32 is not provided in the cutting groove 31, so that the plate retaining portion is connected to the second plate 12. It can be understood that the portion of the plate at the punching position away from the first plate 11 is connected to the second plate 12 to form the bent piece 141 portion of the through-hole structure. Except for the above-mentioned connection position, the plate is separated from the special-shaped workpiece 1, thereby forming a complete through-hole structure. In the above-mentioned processing process, only one downward movement of the upper die 2 is required to realize the processing of the through-hole structure. Compared with the two stamping processes in the prior art, there are fewer steps and higher efficiency. At the same time, the structure of the stamping die is simpler and the cost is lower. In addition, the above-mentioned processing method does not produce any waste.

[0059] Exemplarily, a shaping groove 22 is provided at one end of the punch 21 close to the lower die 3. By providing the shaping groove 22, a preset curvature is formed on the bent piece 141. The bent piece 141 with the preset curvature has a better oil guiding effect.

[0060] Furthermore, the lower die 3 is provided with a shaping protrusion 36, which is arranged corresponding to the shaping groove 22, and when the part of the punch 21 corresponding to the first bearing plane 32 is penetrated into the cutting groove 31, a shaping space is formed between the shaping protrusion 36 and the shaping groove 22, so that the bent piece 141 placed in the shaping space is shaped.

[0061] Preferably, the minimum distance of the shaping space in a direction perpendicular to the first bearing plane 32 is greater than the thickness of the bent piece 141. That is, the minimum distance between the shaping protrusion 36 and the shaping groove 22 in a direction perpendicular to the first bearing plane 32 is greater than the thickness of the bent piece 141. This arrangement effectively avoids rigid contact between the upper die 2 and the lower die 3, thereby ensuring the service life of the stamping die.

[0062] In this embodiment, the punch 21 of the upper die 2 is positioned with the side closer to the first bearing plane 32 lower than the side closer to the second plate 12. This arrangement ensures that the lower end of the cutter head of the upper die 2 first contacts and cuts the first plate 11 on the first bearing plane 32, effectively reducing burrs and improving cutting quality.

[0063] Furthermore, a mating plane 221 parallel to the side wall of the cutting groove 31 is provided on the side of the punch 21 close to the first bearing plane 32. When the upper die 2 is close to the lower die 3, the mating plane 221 and the cutting groove 31 slide together to guide the movement of the punch 21. In addition, the punch 21 is also provided with a cutting plane 222 parallel to the first bearing plane 32. It can be understood that the cutting plane 222 is also perpendicular to the mating plane 221. By setting the cutting plane 222 to achieve cutting of the special-shaped workpiece 1, and at the same time setting the cutting plane 222 as a plane and parallel to the first bearing plane 32, the damage to the punch 21 caused by the contact between the punch 21 and the special-shaped workpiece 1 during cutting can be effectively reduced, and the service life of the punch 21 can be extended.

[0064] Preferably, the width of the punch 21 on the side closest to the first bearing plane 32 is smaller than the width of the punch 21 on the side closest to the second bearing plane 33. By setting the width of the punch 21 that is first released from the first plate 11 on the first bearing plane 32 to be smaller than the width of the punch 21 that is later in contact with the irregularly shaped workpiece 1 on the second bearing plane 33, the width of the cutting plane 222 in the initial stage of cutting can be reduced, thereby reducing the force applied to the punch 21. This allows the force applied to the punch 21 to gradually increase during the downward movement of the upper die 2, thereby reducing wear on the punch 21 and extending the life of the punch 21.

[0065] As an optional solution for the stamping die, the upper die 2 is provided with a positioning die 23, on which a first positioning plane 24 and a through-hole 25 are provided. The first positioning plane 24 is arranged in a direction perpendicular to the first bearing plane 32 and corresponds to the first bearing plane 32, so that when the upper die 2 moves closer to the lower die 3, it can press against the side of the first plate 11 away from the first bearing plane 32. The positioning die 23 is provided with a second positioning plane 26 for pressing against the side of the second plate 12 away from the second bearing plane 33. The punch 21 is provided through the through-hole 25 and can be protruded from the through-hole 25. When the punch 21 is protruded from the through-hole 25, it can be used to cut the special-shaped workpiece 1.

[0066] Preferably, the positioning die 23 is arranged in a floating manner relative to the upper die 2. When the upper die 2 approaches the lower die 3, the positioning die 23 first contacts the irregularly shaped workpiece 1. Then, the upper die 2 continues to approach the lower die 3. At this time, the punch 21 protrudes from the perforation 25 to cut the irregularly shaped workpiece 1. When the upper die 2 moves away from the lower die 3, the punch 21 first retracts into the perforation 25 to disengage the punch 21 from the irregularly shaped workpiece 1; then, the positioning die 23 disengages from the irregularly shaped workpiece 1.

[0067] Similarly, lower die 3 is provided with a floating ejector pin 37. This pin 37 has an initial position, projecting from lower die 3, and a working position, retracting into lower die 3. It is worth noting that after upper die 2 is separated from lower die 3, ejector pin 37 can transition from the working position to the initial position, thereby lifting the irregularly shaped workpiece 1 on lower die 3, separating it from lower die 3 and achieving automatic demolding. Optionally, ejector pin 37 can be attached to lower die 3 via an elastic member to achieve a floating connection with lower die 3.

[0068] In this embodiment, the lower die 3 is provided with multiple cutting grooves 31, and the punches 21 are provided with multiple cutting grooves 31. The multiple cutting grooves 31 are arranged in a one-to-one correspondence with the multiple punches 21, so that multiple through-hole structures can be formed in one stamping, and the processing efficiency is higher.

[0069] This embodiment also discloses a stamping method, which uses a stamping die as any of the above schemes to process a through-hole structure on a special-shaped workpiece. The stamping method includes: placing the first plate 11 on the first bearing plane 32, and placing the second plate 12 on the second bearing plane 33; controlling the upper die 2 to move close to the lower die 3, and the punch 21 cuts the first plate 11 and the second plate 12 in sequence, until the punch 21 at least partially penetrates the cutting groove 31, and the punch 21 at least partially does not penetrate the cutting groove 31, so as to keep at least part of the plate connected to the second plate 12, so as to form a through-hole structure.

[0070] When the above-mentioned stamping method is used to process a through-hole structure on the special-shaped workpiece 1, the upper die 2 only needs to move once close to the lower die 3, which improves the processing efficiency; at the same time, the stamping die structure is simpler, resulting in lower costs.

[0071] like Figure 11-14As shown, this embodiment also discloses a smoke hood, the smoke hood 200 is provided with a smoke guide plate 100, the smoke guide plate 100 includes a mounting plate 110 and a top plate 120, and a connecting plate 130 arranged between the mounting plate 110 and the top plate 120, the connecting plate 130 and the mounting plate 110 are arranged at an angle, and an oil leakage hole 140 is provided at the bend between the two, and the oil leakage hole 140 is processed and made by a stamping die as in any of the above schemes, that is, the mounting plate 110 serves as the first plate 11, the connecting plate 130 serves as the second plate 12, and the through hole 13 serves as the oil leakage hole 140 of the smoke guide plate 100. The oil leakage hole 140 processed by the above-mentioned stamping method has a simpler processing method, better efficiency, lower cost, and fewer burrs on the edge of the processed oil leakage hole 140, so that the smoke guide plate 100 is of higher quality and better aesthetics.

[0072] This embodiment further discloses a range hood including the fume hood 200 of any of the above solutions. Since the fume hood 200 has a lower processing cost, the range hood has a higher cost-performance ratio, thereby effectively improving the market competitiveness of the range hood.

[0073] It can be understood that the smoke hood 200 is provided with a front plate 210, the smoke guide plate 100 is connected to the upper end of the front plate 210, and the side close to the front plate 210 is lower than the side away from the front plate 210, and the oil leakage hole 140 is also provided at the connection between the connecting plate 130 and the mounting plate 110 close to the side of the front plate 210.

[0074] Specifically, a bent piece 141 connected to the connecting plate 130 is provided on one side of the oil leakage hole 140 near the connecting plate 130. This bent piece 141 is formed by the plate material that was not completely cut during processing. This bent piece 141 is connected to the connecting plate 130 and extends toward the outside of the smoke guide plate 100, specifically, into the oil collection chamber. This serves to guide oil droplets that condense within the oil collection chamber and land on the smoke guide plate 100, thereby preventing oil marks and stains on the range hood's exterior.

[0075] Furthermore, the bent piece 141 is in an arc shape as a whole, and the center of the arc is arranged close to the top plate 120, that is, the bent piece 141 is bent upward, which is beneficial to improving the oil guiding effect.

[0076] Preferably, the oil leakage hole 140 extends along the width direction of the smoke guide plate 100, and there are multiple oil leakage holes 140, and the multiple oil leakage holes 140 are spaced apart along the width direction of the smoke guide plate 100. Optionally, the multiple oil leakage holes 140 are all made by the above-mentioned stamping die.

[0077] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The specific contents of the above-mentioned specific embodiments merely represent several embodiments of the present invention. While the description is relatively specific and detailed, it should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the scope of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be based on the appended claims.

Claims

1. A stamping die for processing a through-hole structure on a special-shaped workpiece (1), wherein the special-shaped workpiece (1) comprises a first plate (11) and a second plate (12) connected to each other and arranged at an angle, wherein the through-hole structure comprises through holes located in the first plate (11) and the second plate (12), and a bent piece (141) connected to the second plate (12) and located on one side of the special-shaped workpiece (1), characterized in that: The stamping die comprises a lower die (3) and an upper die (2): The lower mold (3) is provided with a first bearing plane (32) and a second bearing plane (33); the first bearing plane (32) is arranged in a horizontal direction for bearing the first plate (11); the second bearing plane (33) is arranged downwardly and tilted relative to the first bearing plane (32) for bearing the second plate (12); the lower mold (3) is provided with a cutting groove (31), and the groove top of the cutting groove (31) can support the first plate (11) and the second plate (12); The upper die (2) is arranged above the lower die (3), and the upper die (2) includes a punch (21), and the punch (21) can move along the upper and lower directions with the upper die (2) to approach the lower die (3); the part of the punch (21) corresponding to the first bearing plane (32) is lower than the part corresponding to the second bearing plane (33); when the punch (21) moves downward to the lowest point, the part corresponding to the first bearing plane (32) is inserted into the cutting groove (31), the part corresponding to the second bearing plane (33) and close to the part corresponding to the first bearing plane (32) is inserted into the cutting groove (31), and the part corresponding to the second bearing plane (33) and away from the part corresponding to the first bearing plane (32) is not inserted into the cutting groove (31).

2. The stamping die according to claim 1, characterized in that: A shaping groove (22) is provided at one end of the punch (21) close to the lower die (3) to form a preset curvature on the bent piece (141).

3. The stamping die according to claim 2, characterized in that: The lower die (3) is provided with a shaping protrusion (36), and the shaping protrusion (36) is arranged corresponding to the shaping groove (22). When the portion of the punch (21) corresponding to the first bearing plane (32) is inserted into the cutting groove (31), a shaping space is formed between the shaping protrusion (36) and the shaping groove (22).

4. The stamping die according to claim 3, characterized in that: The minimum distance of the shaping space along a direction perpendicular to the first bearing plane (32) is greater than the thickness of the bent sheet (141).

5. The stamping die according to claim 1, wherein: A cutting plane (222) parallel to the first bearing plane (32) is provided on one side of the punch (21) close to the first bearing plane (32).

6. The stamping die according to claim 1, characterized in that: The width of the punch (21) on the side close to the first bearing plane (32) is smaller than the width of the punch on the side close to the second bearing plane (33).

7. The stamping die according to claim 1, characterized in that: The upper die (2) is provided with a positioning die (23), and the positioning die (23) is provided with a first positioning plane (24) and a through hole (25), the first positioning plane (24) is arranged corresponding to the first bearing plane (32) along a direction perpendicular to the first bearing plane (32), and the punch (21) is provided in the through hole (25) and can be protruded from the through hole (25) to cut the special-shaped workpiece (1).

8. The stamping die according to claim 7, characterized in that: The positioning die (23) and the upper die (2) are arranged to float, so that when the upper die (2) moves away from the lower die (3), the punch (21) retracts into the perforation (25).

9. The stamping die according to claim 1, wherein: The lower die (3) is provided with a floating ejector pin (37), and the ejector pin (37) has an initial position protruding from the lower die (3) and a working position retracted into the lower die (3).

10. The stamping die according to any one of claims 1 to 9, characterized in that: The lower die (3) is provided with a plurality of cutting grooves (31), and the punches (21) are provided with a plurality of cutting grooves (31), and the plurality of cutting grooves (31) are provided in a one-to-one correspondence with the plurality of punches (21).

11. A stamping method, characterized in that The punching die according to any one of claims 1 to 10 is used to process a through-hole structure on a special-shaped workpiece, wherein the punching method comprises: Placing the first plate (11) on the first bearing plane (32), and placing the second plate (12) on the second bearing plane (33); The upper die (2) is controlled to move close to the lower die (3), and the punch (21) cuts the first plate (11) and the second plate (12) in sequence until the punch (21) at least partially penetrates the cutting groove (31), and the punch (21) at least partially does not penetrate the cutting groove (31), so as to retain at least a portion of the plate connected to the second plate (12), thereby forming the through-hole structure.

12. The smoke hood is characterized by: A smoke guide plate (100) is provided, the smoke guide plate (100) comprising a mounting plate (110) and a top plate (120), and a connecting plate (130) arranged between the mounting plate (110) and the top plate (120), the connecting plate (130) and the mounting plate (110) being arranged at an angle, and an oil leakage hole (140) being provided at a bending point between the two, the oil leakage hole (140) being made by using the stamping die according to any one of claims 1 to 10.

Images