Machine shell stamping equipment for centrifugal fan machining

Abstract

The invention relates to the technical field of casing stamping, and discloses casing stamping equipment for centrifugal fan machining, which comprises a stamping table, a hydraulic cylinder is fixedly mounted at the top of the stamping table, a stamping head for stamping a metal plate is fixedly mounted at the telescopic end of the hydraulic cylinder, and side plates are arranged on two sides of the stamping table. A lubricating mechanism used for lubricating the two faces of the metal plate is arranged between the two side plates, and limiting mechanisms used for positioning the metal plate are arranged on the side plates. According to the machine shell stamping equipment for centrifugal fan machining, a metal plate is clamped between an upper die and a lower die in a suspended mode through a limiting mechanism, lubricating liquid in a liquid storage box is pumped out through a liquid pump, the lubricating liquid is made to immerse the surface of a sponge sleeve, and in the downward moving process of a stamping head, a T-shaped rod horizontally moves in a horizontal groove; the upper moving rod and the lower moving rod drive the sponge sleeves soaked with the lubricating liquid to get close to the plate, and the two sponge sleeves move along with the T-shaped rods to evenly coat and lubricate the two faces of the plate.

Description

Technical Field

[0001] The invention relates to the technical field of casing stamping, and in particular to a casing stamping device for processing a centrifugal fan. Background Art

[0002] The centrifugal fan casing is mainly composed of a volute, an air inlet, an air outlet, a side panel, etc. Among them, the volute is a curved structure in the shape of a logarithmic spiral or an Archimedean spiral, which is used to collect and convert gas energy. During the processing, the volute usually needs to be stamped, and the metal sheet is cold stamped or hot stamped using a mold to obtain a volute of the required shape and size.

[0003] During the stamping process, a large friction force will be generated between the metal sheet and the die. Since the volute part is a complex curved surface, the friction force may prevent the sheet from deforming into the ideal shape, resulting in size deviation and shape distortion of the stamped volute. In order to avoid the situation where excessive friction causes uneven flow of the sheet in the die, lubricating fluid can be applied on both sides of the sheet to make the material flow more smoothly in the die during stamping, and the stress distribution is more uniform, reducing the defects caused by stress concentration, so that the sheet can successfully complete the complex deformation process.

[0004] However, in large-scale stamping production, the manual application method is very inefficient. In addition, due to differences in operators' techniques and concentration, it is difficult to ensure that the lubricant is evenly distributed on the stamping part of the sheet. The friction between different parts of the sheet and the mold is inconsistent, and there will be local differences in the flow of the material during the stamping process, resulting in deviations in the shape of the volute after forming, affecting the final shape and dimensional accuracy of the product. Summary of the invention

[0005] Technical issues solved In view of the above-mentioned shortcomings of the prior art, the present invention provides a casing stamping device for processing a centrifugal fan, which can effectively solve the problem in the prior art that the casing stamping device lacks the function of automatically and evenly coating lubricating liquid on both sides of the plate.

[0006] Technical Solution To achieve the above objectives, the present invention is implemented through the following technical solutions: The present invention provides a casing stamping device for processing a centrifugal fan, comprising a stamping table, a hydraulic cylinder is fixedly installed on the top of the stamping table, a stamping head for stamping a metal sheet is fixedly installed on the telescopic end of the hydraulic cylinder, side plates are arranged on both sides of the stamping table, a lubrication mechanism for lubricating both sides of the metal sheet is arranged between the two side plates, and a limiting mechanism for positioning the metal sheet is arranged on the side plate; The lubrication mechanism includes a fixing plate slidably connected to the bottom of the side plate. A guiding plate is fixedly installed inside one of the fixing plates. A horizontal groove is formed in the guiding plate. A T-shaped rod is slidably connected in the horizontal groove. A moving rod is slidably connected to the T-shaped rod through a slider. The moving rods are two symmetrically arranged up and down. A sponge sleeve is movably sleeved on the outer side of the moving rod. A liquid storage tank for storing lubricating liquid is arranged at the bottom of the stamping table. A liquid pumping pump is arranged on the liquid storage tank.

[0007] Further, liquid inlet cavities are formed in the moving rods, and a plurality of through holes are formed through the wall bodies of the moving rods. The length of the sponge sleeve is shorter than that of the moving rod, and the length of the sponge sleeve is adapted to the width of the metal plate.

[0008] Further, the input end of the liquid pumping pump extends into the inner cavity of the liquid storage tank through a connecting pipe. The output end of the liquid pumping pump is fixedly installed with a three-way pipe. The liquid outlet of the three-way pipe is communicated with the liquid inlet cavities of the two moving rods through connecting pipes.

[0009] Further, a threaded rod is rotatably installed inside one of the fixing plates. A moving block is fixedly installed at one end of the T-shaped rod away from the moving rod, and the moving block is threadedly installed on the outer surface of the threaded rod. A rack is fixedly installed on the outer wall of the stamping head. A spur gear is fixedly installed at one end of the threaded rod. The rack is in transmission connection with the threaded rod through the spur gear.

[0010] Further, the side plate is slidably connected to the side wall of the stamping table. The limiting mechanism includes a contact plate integrally formed and connected to the middle part inside the side plate. After the telescopic end of the hydraulic cylinder pushes the stamping head to move down by half of the stroke, the outer wall of the stamping head pushes the contact plate to move down synchronously.

[0011] Further, adjusting rods are threadedly installed on the fixing plates. Clamping blocks are fixedly installed at one ends of the two adjusting rods close to each other. Knobs are fixedly installed at one ends of the two adjusting rods away from each other. A hydraulic telescopic rod is installed between the outer walls of the side plate and the stamping table.

[0012] Further, a vertical plate is arranged on one side of the fixing plate, and the vertical plate is fixedly installed on the outer wall of the stamping table. A guiding groove is formed in the vertical plate. A roller is rotatably installed on the outer wall of the fixing plate through a short rod, and the roller is slidably connected in the guiding groove.

[0013] Further, the guiding groove is integrally in a shape of '丿', and the two side guiding grooves are mirror-symmetrical. The guiding groove includes a vertical section, and a downward-inclined section is formed at the tail end of the vertical section.

[0014] Furthermore, a recovery mechanism for recovering lubricating liquid on the sponge sleeve is provided on one side of the lubrication mechanism, and the recovery mechanism includes an extrusion strip arranged on the outer wall of one of the fixed plates, and the extrusion strips are two symmetrically arranged up and down, and the extrusion strip is "C"-shaped as a whole, and a drain port is provided at the bottom of the extrusion strip, and a through groove is provided on the table top of the stamping table.

[0015] Furthermore, a movable groove is provided on the guide plate, and there are two movable grooves symmetrically arranged up and down, and a slip ring is rotatably installed on one end of the movable rod close to the guide plate, and the slip ring is slidably connected in the movable groove; the movable groove includes a horizontal section, and separation sections are provided at both ends of the horizontal section.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention clamps the metal sheet in mid-air between the upper die and the lower die through a limiting mechanism, and the liquid pump draws out the lubricating liquid in the liquid storage tank, so that the lubricating liquid is immersed in the surface of the sponge sleeve. During the downward movement of the punch head, the T-shaped rod moves horizontally in the horizontal groove, so that the upper and lower moving rods drive the sponge sleeve immersed in the lubricating liquid to approach the sheet, and the two sponge sleeves are evenly coated and lubricated on both sides of the sheet as the T-shaped rod moves, so as to avoid local differences in the flow of the material during the stamping process, resulting in deviations in the shape of the volute after forming, affecting the final shape and dimensional accuracy of the product.

[0017] 2. In the present invention, when the punch head moves down to half of its stroke, the wall of the punch head contacts the wall of the contact plate, and the punch head pushes the contact plate to move down synchronously, so that the side plate and the fixed plate move downward. When the roller on the fixed plate moves to the downward inclined section, the fixed plate moves downward and horizontally toward the side away from the plate, so that the adjusting rod and the clamping block move away from the plate and stop clamping it, making the stress distribution inside the plate more uniform. At this time, the plate has fallen on the lower die, and then the punch head drives the upper die to punch the plate.

[0018] 3. In the present invention, when the moving rod drives the sponge cover to move from one side of the plate to the other side, the inner wall of the extrusion bar squeezes the sponge cover, and the lubricating liquid can move in a preset direction after being squeezed. After the lubricating liquid is squeezed out of the sponge cover, it will flow out through the drainage port at the bottom of the extrusion bar, and finally pass through the through groove to be collected and recovered into the liquid storage tank. This not only reduces the waste of the lubricating liquid, but also facilitates subsequent processing and reuse, and avoids excessive immersion of the sponge cover in the lubricating liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 This is a schematic structural diagram of a side panel according to an embodiment of the present invention; Figure 3 For the embodiment of the present invention Figure 2 A schematic diagram of the structure with a partial enlargement at the center; Figure 4 It is a structural schematic diagram of a punch head according to an embodiment of the present invention; Figure 5 It is a structural schematic diagram of a moving rod according to an embodiment of the present invention; Figure 6 This is a schematic structural diagram of a threaded rod according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of a vertical plate according to an embodiment of the present invention; Figure 8 Schematic diagram of the structure of an extruded strip according to an embodiment of the present invention.

[0021] The numbers in the figure represent: 1. punching table; 2. hydraulic cylinder; 3. punching head; 4. side plate; 5. lubrication mechanism; 51. fixed plate; 52. guide plate; 53. horizontal groove; 54. T-bar; 55. moving rod; 56. sponge cover; 57. liquid storage tank; 58. liquid pump; 59. through hole; 510. threaded rod; 511. moving block; 512. rack; 6. limit mechanism; 61. contact plate; 62. adjustment rod; 63. clamping block; 64. hydraulic telescopic rod; 65. vertical plate; 66. guide groove; 661. vertical section; 662. downward inclined section; 67. roller; 7. recovery mechanism; 71. extrusion strip; 72. drainage port; 73. moving groove; 731. horizontal section; 732. separation section. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] The present invention will be further described below in conjunction with the embodiments.

[0024] Example 1, reference Figure 1-Figure 6 , which is the first embodiment of the present invention, provides a casing stamping device for processing a centrifugal fan, including a stamping table 1, a hydraulic cylinder 2 is fixedly installed on the top of the stamping table 1, a stamping head 3 for stamping a metal sheet is fixedly installed at the telescopic end of the hydraulic cylinder 2, an upper die for stamping a metal sheet is fixedly installed at the telescopic end of the hydraulic cylinder 2, a lower die for stamping a metal sheet is fixedly installed on the table of the stamping table 1, and the metal sheet is placed between the upper die and the lower die ( Figure 1 , Figure 2 ; Side plates 4 are provided on both sides of the punching table 1, a lubrication mechanism 5 for lubricating both sides of the metal sheet is installed between the two side plates 4, and a limiting mechanism 6 for positioning the metal sheet is installed on the side plates 4. The limiting mechanism 6 can be a fixture block or a stopper set at a specific position of the sheet to limit the movement of the sheet, but it is also necessary to cooperate with a telescopic cylinder or an electric push rod so that the metal sheet can be suspended between the upper die and the lower die. After the lubricating liquid is coated on both sides of the metal sheet, it moves with the punch head 3 and falls on the lower die, and then receives the punching of the upper die.

[0025] The lubrication mechanism 5 includes a fixed plate 51 horizontally slidably connected to the bottom of the side plate 4 through a dovetail slider, a guide plate 52 is fixedly installed on the inner side of one of the fixed plates 51, a horizontal groove 53 is opened on the guide plate 52, a T-shaped rod 54 is slidably connected in the horizontal groove 53, a moving rod 55 is slidably connected to the T-shaped rod 54 through a slider, the moving rod 55 is symmetrically arranged in the upper and lower parts, and a sponge sleeve 56 is provided on the outer movable sleeve of the moving rod 55, a liquid storage tank 57 for storing lubricating liquid is placed at the bottom of the stamping table 1, and a liquid pump 58 is installed on the liquid storage tank 57 through a support plate.

[0026] Specifically, the metal sheet is suspended and clamped between the upper die and the lower die through the limiting mechanism 6, and the liquid pump 58 draws out the lubricating liquid in the liquid storage tank 57, so that the lubricating liquid is immersed in the surface of the sponge sleeve 56. During the downward movement of the punch head 3, the T-shaped rod 54 moves horizontally in the horizontal groove 53, so that the upper and lower moving rods 55 drive the sponge sleeve 56 immersed in the lubricating liquid to approach the sheet, and the two sponge sleeves 56 move with the movement of the T-shaped rod 54 to evenly coat and lubricate both sides of the sheet, so as to avoid local differences in the flow of the material during the stamping process, resulting in deviations in the shape of the volute after forming, affecting the final shape and dimensional accuracy of the product.

[0027] Specifically, the sponge has moderate elasticity and can produce reversible deformation when compressed without causing permanent impact on its recovery to its original state (it can return to its original state after being immersed in liquid); the minimum distance between the two sponge sleeves 56 is less than the thickness of the sheet to be punched, so that the sponge sleeves 56 can fully contact the surface of the sheet to achieve a uniform lubrication effect.

[0028] Reference Figure 4 and Figure 5 The input end of the liquid pump 58 extends to the inner cavity of the liquid storage tank 57 through a connecting hard pipe, and a three-way pipe is fixedly installed at the output end of the liquid pump 58. The liquid outlets of the three-way pipe are respectively connected to the liquid inlet cavities of the two moving rods 55 through connecting hoses; the moving rods 55 are each provided with a liquid inlet cavity, and a plurality of through holes 59 are penetrated through the wall of the moving rod 55. The length of the sponge cover 56 is shorter than that of the moving rod 55, and the length of the sponge cover 56 is adapted to the width of the metal plate.

[0029] Specifically, the liquid pump 58 draws out the lubricating liquid in the liquid storage tank 57 and outputs it to two connecting hoses through the three-way pipe, so that the lubricating liquid flows into the movable rod 55, and then overflows through the through hole 59 to penetrate into the sponge cover 56. Under the horizontal movement of the T-shaped rod 54, the sponge cover 56 moves on the surface of the plate and rotates along its own axis, reducing the situation of excessive or insufficient local lubricating liquid, and evenly coating the lubricating liquid on the plate, which helps to improve the quality of metal plate processing and reduce the wear between the mold and the plate, thereby extending the service life of the mold.

[0030] Reference Figure 4 and Figure 6 A threaded rod 510 is rotatably installed on the inner side of one of the fixed plates 51, a moving block 511 is fixedly installed on the end of the T-shaped rod 54 away from the moving rod 55, and the moving block 511 is threadedly installed on the outer surface of the threaded rod 510, a rack 512 is fixedly installed on the outer wall of the punch head 3, a spur gear is fixedly installed on one end of the threaded rod 510, and the rack 512 is transmission connected to the threaded rod 510 through the spur gear.

[0031] Specifically, when the hydraulic cylinder 2 is started to move the punch head 3 downward, the rack 512 moves downward synchronously, thereby causing the spur gear meshing therewith to rotate. In this way, under the limiting action of the horizontal groove 53, the threaded rod 510 rotates to cause the moving block 511 and the T-shaped rod 54 to move horizontally, and the two moving rods 55 move from one side of the plate to the other side, and their surfaces are coated with lubrication through a sponge sleeve 56 soaked in lubricating liquid.

[0032] Example 2, reference Figure 1-Figure 7, which is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the side plate 4 is slidably connected to the side wall of the stamping table 1. The limiting mechanism 6 includes a contact plate 61 integrally formed and connected to the middle part inside the side plate 4; adjusting rods 62 are threadedly installed on the fixing plates 51. Clamping blocks 63 are fixedly installed at the ends of the two adjusting rods 62 close to each other, and knobs are fixedly installed at the ends of the two adjusting rods 62 away from each other. A hydraulic telescopic rod 64 is installed between the outer wall of the side plate 4 and the stamping table 1.

[0033] Specifically, by rotating the knob, the adjusting rod 62 is moved, so as to adjust the distance between the two clamping blocks 63. Adjust according to the length of the plate to be stamped, so that the clamping blocks 63 continuously approach the side wall of the plate until clamping is completed. The hydraulic telescopic rod 64 is controlled to extend and retract through a hydraulic system. When hydraulic oil is pumped into or out of the oil cylinder, the telescopic rod will extend or retract accordingly. There is a spring or elastic element included in the hydraulic system design to help the oil cylinder piston return to the initial position after the hydraulic pressure is released; when the stamping head 3 moves upward, after stopping applying pressure to the side plate 4, under the reset action of the hydraulic telescopic rod 64, the side plate 4 and the fixing plate 51 are driven to reset upward.

[0034] Specifically, before the upper die fits the plate for stamping, the plate is horizontally suspended and clamped, which is more convenient for evenly coating lubricating fluid on both sides of the plate; at different stages of stamping, the deformation methods and requirements of the material are different. In the preliminary forming stage, the plate may need to have a large overall deformation. At this time, loosening the clamping can allow each part of the plate to fully participate in the deformation, avoiding stress concentration caused by clamping the side wall and affecting the plastic flow of the material; therefore, when the upper die stamps, the clamping of the side wall of the plate should be automatically loosened, so that the stress distribution inside the plate is more uniform, and the material can plastically flow more freely according to the shape of the stamping die and the stamping pressure, so as to better form complex shapes.

[0035] Refer to Figure 2 、 Figure 6 and Figure 7 , after the telescopic end of the hydraulic cylinder 2 pushes the stamping head 3 down to half of the stroke, the outer wall of the stamping head 3 pushes the contact plate 61 to move down synchronously; a vertical plate 65 is provided on one side of the fixing plate 51, and the vertical plate 65 is fixedly installed on the outer wall of the stamping table 1. A guiding groove 66 is formed on the vertical plate 65. A roller 67 is rotatably installed on the outer wall of the fixing plate 51 through a short rod, and the roller 67 is slidably connected in the guiding groove 66; the guiding groove 66 is integrally in a "丿" shape, and the two guiding grooves 66 on both sides are mirror-symmetrical. The guiding groove 66 includes a vertical section 661, and a downward inclined section 662 is formed at the end of the vertical section 661.

[0036] Specifically, when the punch head 3 moves down to half of the stroke, the wall of the punch head 3 contacts the wall of the contact plate 61, and the punch head 3 pushes the contact plate 61 to move down synchronously, so that the side plate 4 and the fixed plate 51 move downward. When the roller 67 on the fixed plate 51 moves to the downward inclined section 662, the fixed plate 51 moves downward and horizontally moves to the side away from the plate, so that the adjustment rod 62 and the clamping block 63 move away from the plate and stop clamping it, so that the stress distribution inside the plate is more uniform. At this time, the plate has fallen on the lower die, and then the punch head 3 drives the upper die to punch the plate. When stamping and forming complex shapes, loosening the clamping material allows it to flow more freely, reducing the folding and accumulation of the material in the mold, making the material deform more evenly, thereby reducing the risk of cracks and fractures. The rest of the structure is the same as that of Example 1.

[0037] Example 3, reference Figure 1-Figure 8 , which is the third embodiment of the present invention. This embodiment is different from the second embodiment in that: a recovery mechanism 7 for recovering the lubricating liquid on the sponge sleeve 56 is installed on one side of the lubricating mechanism 5, and the recovery mechanism 7 includes an extrusion bar 71 fixedly installed on the outer wall of one of the fixed plates 51, and the extrusion bars 71 are two symmetrically arranged up and down, and the extrusion bars 71 are "C" shaped as a whole. A drainage port 72 is opened at the bottom of the extrusion bar 71, and a through groove is opened on the table top of the stamping table 1.

[0038] Specifically, the inner diameter of the extrusion strip 71 is smaller than the outer diameter of the sponge cover 56, so that when the moving rod 55 drives the sponge cover 56 to move from one side of the plate to the other side, the inner wall of the extrusion strip 71 squeezes the sponge cover 56, and the lubricating liquid can move in a preset direction after being squeezed. After the lubricating liquid is squeezed out of the sponge cover 56, it will flow out through the drain port 72 at the bottom of the extrusion strip 71, and finally pass through the through groove (that is, through the table top of the stamping table 1) and be collected and recovered into the liquid storage tank 57. This not only reduces the waste of lubricating liquid, but also facilitates subsequent processing and reuse, and avoids excessive immersion of the sponge cover 56 in the lubricating liquid.

[0039] Reference Figure 6 The guide plate 52 is provided with a moving groove 73, and the moving grooves 73 are two symmetrically arranged up and down. The end of the moving rod 55 close to the guide plate 52 is rotatably installed with a slip ring ( Figure 5 The slip ring is slidably connected in the movable groove 73; the movable groove 73 includes a horizontal section 731, and separation sections 732 are provided at both ends of the horizontal section 731.

[0040] Specifically, when the punch head 3 is located at the top (initial state), the moving rods 55 are all located in the separation section 732 away from the extrusion strip 71; the liquid pump 58 draws out the lubricating liquid in the liquid storage tank 57 and outputs it to the two moving rods 55 respectively, so that the sponge cover 56 is fully soaked. When the punch head 3 moves downward, the moving rod 55 first moves from the separation section 732 in the initial state to the horizontal section 731, so that the upper and lower sponge covers 56 are in contact with the surface of the plate. As the punch head 3 continues to move downward, the sponge covers 56 complete the lubrication coating on the surface of the plate. Then, the moving rod 55 moves from the horizontal section 731 to the separation section 732 on the other side, so that the two sponge covers 56 are away from each other and are respectively put into the extrusion strip 71 to recover the lubricating liquid.

[0041] Specifically, the liquid storage box 57 can be selected as a box with an open top, so as to directly receive the lubricating liquid dripping from the top extrusion strip 71; the liquid storage box 57 can also be selected as a closed box, with a receiving box (not shown in the figure) with a filter screen installed on the top, and the receiving box is connected to the inner cavity of the liquid storage box 57 through a connecting pipe, and the recovered lubricating liquid is further filtered before being recovered, so as to avoid clogging of the pipeline when the lubricating liquid is subsequently extracted. The rest of the structure is the same as that of Example 2.

[0042] Based on Examples 1-3, the working principle of the present invention is as follows: The distance between the two clamping blocks 63 is adjusted according to the length of the sheet to be punched, so that the clamping blocks 63 can complete the clamping of the side wall of the sheet. The pump 58 extracts the lubricating liquid in the liquid storage tank 57 and outputs it to the two connecting hoses through the three-way pipe, so that the lubricating liquid flows into the moving rod 55 and then overflows through the through hole 59 so that the sponge cover 56 is fully soaked. The hydraulic cylinder 2 is started to drive the punching head 3 to move downward, and the rack 512 moves downward synchronously. Under the limiting effect of the horizontal groove 53, the threaded rod 510 rotates so that the moving block 511 and the T-shaped rod 54 are water-sealed. The moving rod 55 moves horizontally along the path of the moving groove 73, and the upper and lower sponge sleeves 56 fit with the surface of the plate. As the punch head 3 continues to move downward, the sponge sleeves 56 complete the lubrication coating on the surface of the plate. Then the moving rod 55 moves from the horizontal section 731 to the separation section 732 on the other side, so that the two sponge sleeves 56 move away from each other and are respectively received in the extrusion strip 71. The inner wall of the extrusion strip 71 squeezes the sponge sleeves 56, and the lubricating liquid will flow out through the drain port 72 after being squeezed. Finally, the excess lubricating liquid is collected and recovered into the liquid storage tank 57.

[0043] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A casing stamping device for processing a centrifugal fan, comprising a stamping table (1), a hydraulic cylinder (2) fixedly mounted on the top of the stamping table (1), a stamping head (3) for stamping a metal sheet fixedly mounted on the telescopic end of the hydraulic cylinder (2), characterized in that: Side plates (4) are arranged on both sides of the punching table (1); a lubrication mechanism (5) for lubricating both sides of the metal plate is arranged between the two side plates (4); and a limiting mechanism (6) for positioning the metal plate is arranged on the side plates (4); The lubricating mechanism (5) comprises a fixed plate (51) slidably connected to the bottom of the side plate (4), wherein a guide plate (52) is fixedly mounted on the inner side of one of the fixed plates (51), a horizontal groove (53) is provided on the guide plate (52), a T-shaped rod (54) is slidably connected in the horizontal groove (53), a moving rod (55) is slidably connected to the T-shaped rod (54) via a slider, the moving rod (55) is symmetrically arranged in two pieces, and a sponge sleeve (56) is provided on the outer movable sleeve of the moving rod (55), and a liquid storage tank (57) for storing lubricating liquid is provided at the bottom of the punching table (1), and a liquid pump (58) is provided on the liquid storage tank (57).

2. The casing stamping equipment for centrifugal fan processing according to claim 1 is characterized in that: The movable rod (55) is provided with a liquid inlet cavity, and a plurality of through holes (59) are provided through the wall of the movable rod (55). The length of the sponge sleeve (56) is shorter than that of the movable rod (55), and the length of the sponge sleeve (56) is adapted to the width of the metal plate.

3. The casing stamping equipment for centrifugal fan processing according to claim 1, characterized in that: The input end of the liquid pump (58) extends to the inner cavity of the liquid storage tank (57) through a connecting pipe, and a three-way pipe is fixedly installed on the output end of the liquid pump (58), and the liquid outlet of the three-way pipe is respectively connected to the liquid inlet cavities of the two moving rods (55) through connecting pipes.

4. The casing stamping equipment for centrifugal fan processing according to claim 1, characterized in that: A threaded rod (510) is rotatably mounted on the inner side of one of the fixed plates (51), a moving block (511) is fixedly mounted on one end of the T-shaped rod (54) away from the moving rod (55), and the moving block (511) is threadedly mounted on the outer surface of the threaded rod (510), a rack (512) is fixedly mounted on the outer wall of the punch head (3), a spur gear is fixedly mounted on one end of the threaded rod (510), and the rack (512) is transmission-connected to the threaded rod (510) via the spur gear.

5. The casing stamping equipment for centrifugal fan processing according to claim 4, characterized in that: The side plate (4) is slidably connected to the side wall of the punching table (1), and the limiting mechanism (6) comprises a contact plate (61) integrally formed and connected to the middle part of the inner side of the side plate (4); after the telescopic end of the hydraulic cylinder (2) pushes the punching head (3) to move down to half of the stroke, the outer wall of the punching head (3) pushes the contact plate (61) to move down synchronously.

6. The casing stamping equipment for centrifugal fan processing according to claim 5, characterized in that: The fixing plate (51) is threadedly mounted with an adjusting rod (62), the ends of the two adjusting rods (62) close to each other are fixedly mounted with a clamping block (63), the ends of the two adjusting rods (62) away from each other are fixedly mounted with a knob, and a hydraulic telescopic rod (64) is installed between the side plate (4) and the outer wall of the punching table (1).

7. The casing stamping equipment for centrifugal fan processing according to claim 6, characterized in that: One side of the fixed plate (51) is provided with a vertical plate (65), and the vertical plate (65) is fixedly installed on the outer wall of the stamping table (1). A guiding groove (66) is formed on the vertical plate (65). A roller (67) is rotatably installed on the outer wall of the fixed plate (51) through a short rod, and the roller (67) is slidably connected in the guiding groove (66).

8. The casing stamping equipment for centrifugal fan processing according to claim 7, characterized in that: The guiding groove (66) is integrally in the shape of a "丿", and the two guiding grooves (66) on both sides are mirror-symmetrical. The guiding groove (66) includes a vertical section (661), and a downward-inclined section (662) is formed at the tail end of the vertical section (661).

9. The casing stamping equipment for processing a centrifugal fan according to claim 8, characterized in that: One side of the lubricating mechanism (5) is provided with a recovery mechanism (7) for recovering the lubricating liquid on the sponge sleeve (56). The recovery mechanism (7) includes extrusion strips (71) arranged on the outer wall of one of the fixed plates (51). The extrusion strips (71) are two and arranged symmetrically up and down. The extrusion strips (71) are integrally in the shape of a "C". A liquid discharge port (72) is formed at the bottom of the extrusion strip (71). A through groove is formed on the table surface of the stamping table (1).

10. The casing stamping equipment for centrifugal fan processing according to claim 7, characterized in that: Moving grooves (73) are formed on the guiding plate (52). The two moving grooves (73) are arranged symmetrically up and down. A sliding ring is rotatably installed at one end of the moving rod (55) close to the guiding plate (52), and the sliding ring is slidably connected in the moving groove (73). The moving groove (73) includes a horizontal section (731), and separation sections (732) are formed at both ends of the horizontal section (731).

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