Automatic grinding device and method for sheet metal corners of box-type substation

Abstract

The present invention discloses an automatic grinding device and method for sheet metal corners of a box-type substation, and relates to the technical field of box body grinding. The automatic grinding device for sheet metal corners of a box-type substation includes a grinding belt, which is wound into a polygonal structure by a pulley, one side of the polygonal structure serving as a grinding edge, a right-angle frame located within the polygonal structure, the angle of the right-angle frame aligned with the grinding edge, and a compensation structure located within the polygonal structure for compensating for the deformation of the grinding edge when it is transformed into a right-angled edge. The right-angle frame and the extension frame are arranged to form a right-angle platform for grinding the right-angled edge, and the compensation structure is used to compensate for the deformation of the grinding belt required to transform the grinding edge into a right-angled edge. When the grinding belt is subjected to pressure from the sheet metal corner of the box-type substation, its grinding edge can be attached to the right-angle platform, tightly fitting the sheet metal corner of the box-type substation, and frictionally grinding the sheet metal corner in a right-angle driven manner.

Description

Technical Field

[0001] The present invention relates to the technical field of box body grinding, and in particular to an automatic grinding device and method for sheet metal corners of a box-type substation. Background Art

[0002] A box-type substation is an integrated power equipment that achieves efficient and flexible power conversion and distribution through a modular design. It is widely used in residential, transportation, industrial, mining and other fields. A box-type substation mainly consists of a high-voltage room, a transformer room, and a low-voltage room. The electrical components in each room are usually supported by equipment such as incoming line cabinets, outgoing line cabinets, metering cabinets, and ring network cabinets. The various boxes that make up the box-type substation are mostly produced using sheet metal bending and welding processes. After the box is manufactured, due to residual weld scars and burrs on its corners, it needs to be polished to make the "R" corners smoother.

[0003] For example, the Chinese patent publication number CN114505748A discloses a device for grinding the internal corners of a box and sheet metal corners. When grinding the sheet metal corners of a box, this type of device starts the grinder to start the grinding head, and controls the motor to drive the X-axis sliding plate to move on the beam through the screw, then starts the Y-axis push rod to control the movement of the grinder on the Y-axis, then starts the Z-axis push rod to move the grinder up and down, and then controls the movement of the grinder on the Z-axis. The three work together to complete the positioning of the box grinding position.

[0004] However, the existing method of using three-dimensional displacement of the grinding head component to complete the grinding of the sheet metal corners of the box body requires controlling the grinding head to perform displacement grinding on both sides of the sheet metal corners and the sheet metal R corners in sequence before completing the grinding of the sheet metal corners. The corner grinding is relatively single and limited, and it takes a long time. The smoothness quality of the corner grinding is low, and the smoothing effect is not ideal. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention provides an automatic grinding device and method for sheet metal corners of a box-type substation, which solves the problems raised in the background art.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: an automatic grinding device and grinding method for sheet metal corners of a box-type substation.

[0007] On the one hand, the present invention provides an automatic grinding device for the sheet metal corners of a box-type substation, comprising: a grinding belt, the grinding belt is wound into a polygonal structure by a pulley, and one of the sides of the polygonal structure is used as a grinding edge; a right-angle frame, the right-angle frame is located in the polygonal structure, the angle of the right-angle frame is aligned with the grinding edge, and the use of the sheet metal corner of the box-type substation to apply pressure to the grinding edge can make the grinding edge fit on the right-angle frame, so that the grinding edge forms a right-angle edge, and the right-angle edge applies pressure to the sheet metal corner of the box-type substation and grinds it; a compensation structure, the compensation structure is located in the polygonal structure, and is used to compensate for the deformation of the grinding edge converted into a right-angle edge.

[0008] Furthermore, the right-angle frame is aligned with the middle of the polishing edge, and the right-angle frame is provided with two sets of extension frames that are staggered and overlapped with it along the extension direction of its side plate; the compensation structure includes a compensation component, which is provided on the right-angle side of the right-angle frame and is used to drive the extension frame away from or close to the right-angle frame. The extension frame and the right-angle frame form a right-angle platform with adjustable size.

[0009] Furthermore, the pulley includes a driving pulley and two driven pulleys, which form a triangular structure of the grinding belt, with a grinding edge between the two driven pulleys; the compensation component is also used to drive the driven pulley and the driving pulley to move synchronously with the extension frame to compensate for the elongation or shortening of the grinding belt surface close to the right-angle platform, so that the grinding belt is concave to the right-angle platform when it contacts the corners of the box-type substation.

[0010] Furthermore, it also includes: a first conveyor belt, which is provided in two groups and is staggered on the two side plates of the right-angle frame; a second conveyor belt, which is provided in two groups and is staggered with the first conveyor belt and is provided on the extension frame, and rotates simultaneously with the first conveyor belt. When the grinding belt is transformed into a right angle by the pressure of the sheet metal corners of the box-type substation, it contacts the first conveyor belt and the second conveyor belt.

[0011] Furthermore, it also includes: a second driven shaft, the second driven shaft is arranged at a right angle to the right-angle frame, and is coaxial with the two groups of first conveyor belts; a second prismatic driven shaft, the second prismatic driven shaft is arranged on the moving path of the extension frame, and is meshed with the second driven shaft through a third bevel gear pair, the second prismatic driven shaft is provided with a fourth bevel gear pair along its axial sliding, and the fourth bevel gear pair is coaxial with the second conveyor belt, so that when the second conveyor belt moves relative to the first conveyor belt, the second conveyor belt and the first conveyor belt always keep synchronous rotation.

[0012] Furthermore, the compensation component includes a first displacement structure for driving the extension frame to move synchronously with the driven pulley and a second displacement structure for driving the active pulley to move synchronously with the driven pulley, wherein the first displacement structure includes: a first screw rod, the first screw rod is provided in two groups, each group is provided with two, the two groups of first screw rods are provided at a ninety-degree angle on both sides of the right angle of the right-angle frame, and the first screw rod is provided with a first screw sleeve along its axial direction; a first bracket, the first bracket is provided on the first screw sleeve, the thread force of the first screw rod is converted into a horizontal transmission to the first screw sleeve, pushing the first bracket to move, the first bracket is fixed to the extension frame, and is rotatably connected to the driven pulley.

[0013] Furthermore, the second displacement structure includes: a second screw rod, which is arranged at a right angle to the right-angle frame away from the first screw rod, and the second screw rod is provided with a second screw sleeve along its axial direction, and the other end of the second screw sleeve is provided with a side support frame; a second bracket, the second bracket is provided on the second screw sleeve, and the thread force of the second screw rod is converted into a horizontal transmission to the second screw sleeve, pushing the second bracket to move, and the second bracket is fixed to the second screw sleeve through the side support frame, and is rotatably connected to the driving pulley.

[0014] Furthermore, the second displacement structure also includes: a screw rod, which is arranged on one side of the side support frame and is provided with at least one group, and the screw rod is provided with a screw sleeve along its axial direction; a compression spring, which can be sleeved on the screw rod, and the compression spring is fixed to the second bracket and is rotatably connected to the screw sleeve. When the screw sleeve moves along the screw rod, elastic storage capacity is applied to or released on the compression spring; a guide sleeve, which is arranged on the displacement path of the second sleeve, and a guide rod is slidably connected in the guide sleeve, and the guide rod passes through the side support frame, the screw and the second bracket are fixed. When the guide rod slides along the guide sleeve, a rotation limit is applied to the displacement of the side support frame, and a guide limit is applied to the displacement of the second bracket.

[0015] Furthermore, the compensation component also includes a driving bevel gear arranged between the first screw rod and the second screw rod, wherein the driving bevel gear is engaged with a first driven bevel gear arranged at one end of the first screw rod, and the driving bevel gear is engaged with a second driven bevel gear arranged at the other end of the second screw rod, so that the first screw rod and the second screw rod rotate synchronously.

[0016] On the other hand, the present invention also provides a method for automatically grinding sheet metal corners of a box-type substation, comprising the following steps:

[0017] Step 1: According to the size of the corners to be polished of the box-type substation, control the extension frame to move away from or close to the right-angle frame so that the two form a right-angle platform of appropriate size;

[0018] Step 2: Place the box-type substation on the grinding platform, and make the corners to be ground face the right angle of the right-angle bracket. Then adjust the orientation of the first right-angle plate and the second right-angle plate so that they fit with the box plates on both sides of the corners of the box-type substation, apply limit to them, and then control the pressure plate to apply pressure to the box-type substation to position the three points of the box-type substation.

[0019] Step 3: Driven by the second electric rod, the right-angle frame and the right-angle platform of the extension frame are pushed toward the corner of the box-type substation and pressed against the corner. At this time, the grinding belt is concave due to the resistance of the corner of the box-type substation, so that its outer grinding surface is closely attached to the corner of the box-type substation, and its inner driving surface is closely attached to the right-angle platform and fits with the first conveyor belt and the second conveyor belt;

[0020] Step 4: Control the rotation of the grinding belt so that its grinding contact part moves along the trajectory of the right-angle table, and perform close grinding on the corners of the box-type substation. Based on the drive of the first electric rod, push the grinding belt up and down, move along the corner line of the box-type substation to fully grind its corners, and while the grinding belt is running, drive the first conveyor belt and the second conveyor belt to rotate synchronously, reduce the friction resistance of the grinding belt in the right-angle table, and apply stall thrust to the grinding belt.

[0021] The present invention has the following beneficial effects:

[0022] (1) The automatic grinding device for sheet metal corners of box-type substations forms a right-angle table for grinding right-angle edges through the setting of a right-angle frame and an extension frame, and uses a compensation structure to compensate for the deformation required for the grinding edge of the grinding belt to be converted into a right-angle edge, so that when the grinding belt is subjected to the pressure of the sheet metal corners of the box-type substation, its grinding edge can be attached to the right-angle table and closely fit with the sheet metal corners of the box-type substation. In a right-angle drive mode, friction grinding is performed on the sheet metal corners, and the corner grinding is more comprehensive, the grinding and smoothing effect is better, and the grinding efficiency is faster and more efficient.

[0023] (2) The automatic grinding device for sheet metal corners of box-type substations can, through the setting of the compensation structure, on the one hand drive the extension frame to move telescopically relative to the right-angle frame to form right-angle platform structures of different sizes to adapt to different sheet metal corners of box-type substations; on the other hand, it can drive the driven pulley and the driving pulley to move synchronously with the extension frame, so that the surface of the grinding belt close to the right-angle platform is extended or shortened, compensating for the deformation amount required for the grinding belt to be concave to the right-angle platform when it contacts the corners of the box-type substation, so that the grinding belt maintains a suitable right-angle size and fits the corners of the box-type substation, and performs a precise grinding process.

[0024] (3) The automatic grinding device for sheet metal corners of the box-type substation uses the synchronous transmission characteristics of the first conveyor belt and the second conveyor belt along the right-angle table, so that when the grinding belt is concave into the right-angle table for grinding, it contacts the first conveyor belt and the second conveyor belt, and uses the synchronous drive of the first conveyor belt and the second conveyor belt to reduce the relative friction between the grinding belt and the right-angle table on the one hand, and on the other hand, when the grinding belt tends to stall due to excessive grinding intensity, a thrust is applied to the grinding belt to maintain the grinding transmission state of the grinding belt.

[0025] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the present invention;

[0027] Figure 2 Schematic diagram of part of the structure of the present invention Figure 1 ;

[0028] Figure 3 Schematic diagram of part of the structure of the present invention Figure 2 (cut open);

[0029] Figure 4 Schematic diagram of part of the structure of the present invention Figure 3 (cut open);

[0030] Figure 5 Schematic diagram of part of the structure of the present invention Figure 4 ;

[0031] Figure 6 Schematic diagram of part of the structure of the present invention Figure 5 ;

[0032] Figure 7 Schematic diagram of part of the structure of the present invention Figure 6 ;

[0033] Figure 8 Schematic diagram of part of the structure of the present invention Figure 7 ;

[0034] Figure 9 Schematic diagram of part of the structure of the present invention Figure 8 ;

[0035] Figure 10 Schematic diagram of the structure of the first displacement structure in the present invention;

[0036] Figure 11 Schematic diagram of the structure of the second displacement structure of the present invention;

[0037] Figure 12 is a plan view of the second displacement structure of the present invention;

[0038] Figure 13 Schematic diagram of the assembly of the first conveyor belt and the second conveyor belt in the present invention;

[0039] Figure 14 Schematic diagram of part of the structure of the present invention Figure 9 ;

[0040] Figure 15 For the present invention Figure 14 Enlarged view of point A in the middle;

[0041] Figure 16 Schematic diagram of part of the structure of the present invention Figure 10 ;

[0042] Figure 17 Schematic diagram of the grinding operation process of the present invention (top view).

[0043] In the figure, 1, support table; 2, fixing frame; 3, housing; 4, grinding belt; 5, second bracket; 6, driving pulley; 7, first bracket; 8, driven pulley; 9, right-angle bracket; 10, first conveyor belt; 11, extension frame; 12, second conveyor belt; 13, driving shaft; 14, first driven shaft; 15, first transmission belt; 16, second driven shaft; 17, dust collecting trough; 18, first guide rail; 19, bottom support frame; 20, second guide rail; 21, second electric rod; 22, first electric rod; 23, first bevel gear pair; 24, first prismatic driven shaft; 25, first support frame; 26, second bevel gear pair; 27, third driven shaft; 28, second transmission belt ;29. First screw rod;30. First thread sleeve;31. Side support frame;32. Compression spring;33. Second screw rod;34. Second thread sleeve;35. Second driven bevel gear;36. Active bevel gear;37. First driven bevel gear;38. First motor;39. Second motor;40. First gear;41. Second gear;42. Third gear;43. Fourth gear;44. Guide sleeve;45. Guide rod;46. Screw rod;47. Screw sleeve;48. Second prismatic driven shaft;49. Third bevel gear pair;50. Fourth bevel gear pair;51. Second support frame;52. First right-angle plate;53. Second right-angle plate;54. Press plate;55. Grinding platform. DETAILED DESCRIPTION

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only 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 making creative efforts are within the scope of protection of the present invention.

[0045] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0046] like Figures 1-17 As shown, an embodiment of the present invention provides a technical solution: an automatic grinding device and grinding method for sheet metal corners of a box-type substation.

[0047] On the one hand, the present invention provides a device for automatically grinding sheet metal corners for a box-type substation:

[0048] like Figures 1-4 As shown, an automatic grinding device for sheet metal corners of a box-type substation includes a grinding belt 4, which is wound into a polygonal structure by a pulley. One side of the polygonal structure is used as a grinding edge, and a right-angle frame 9 is provided in the grinding belt 4 of the polygonal structure. The right angle of the right-angle frame 9 is aligned with the grinding edge. At the same time, a compensation structure is provided on one side of the polygonal structure close to the right-angle frame 9 to compensate for the deformation amount of the grinding edge into a right-angled edge. When the sheet metal corners of the box-type substation are ground, the compensation structure is used as a compensation structure according to the grinding size range of the sheet metal corners. As the driving source, on the one hand, the right-angle frame 9 is made to form a right-angle platform of corresponding size to fit the corner of the sheet metal of the box-type substation. On the other hand, the surface of the grinding belt 4 close to the right-angle platform is stretched or shortened to compensate for the deformation required for the grinding belt 4 to be concave to the right-angle platform when it contacts the corner of the sheet metal of the box-type substation. When the grinding belt 4 is close to the corner of the sheet metal of the box-type substation, the grinding edge of the grinding belt 4 is pressed against the corner of the sheet metal of the box-type substation by the pressure of the corner of the sheet metal of the box-type substation, so that the grinding edge forms a right-angle side. The right-angle side applies pressure to the corner of the sheet metal of the box-type substation and grinds it. Specifically:

[0049] The right-angle frame 9 is aligned with the middle of the polishing edge so that the polishing edge is concave with the right angle of the right-angle frame 9 as the center. The right-angle frame 9 is provided with two sets of extension frames 11 that overlap with it along the extension direction of its side panel, and a compensation component composed of a compensation structure is used to drive the extension frame 11 away from or close to the right-angle frame 9, so that the extension frame 11 and the right-angle frame 9 are staggered and displaced to form a right-angle table with adjustable size, which is suitable for the polishing size range of the sheet metal corners of the box-type substation.

[0050] In addition, the pulleys include a driving pulley 6 and two driven pulleys 8. The driving pulley 6 and the two driven pulleys 8 make the grinding belt 4 form a triangular polygonal structure. The grinding edge is between the two driven pulleys 8, and a compensation component composed of a compensation structure is used to drive the driven pulley 8 and the driving pulley 6 to move synchronously with the extension frame 11, so that when the size of the right-angle table changes, the grinding edge belt surface of the grinding belt 4 is synchronously extended or shortened to compensate for the deformation amount required by the grinding belt 4 to be concave to the right-angle table due to the pressure of the sheet metal corners of the box-type substation, so that the grinding belt 4 is concave to the right-angle table when it contacts the sheet metal corners of the box-type substation.

[0051] It should be noted that a casing 3 for supporting the grinding belt 4 is provided inside the grinding belt 4, and a support platform 1 is provided below the casing 3. The support platform 1 supports the casing 3 through the fixed frame 2, and a bottom support frame 19 for slidingly supporting the fixed frame 2 is provided inside the support platform 1. A second guide rail 20 and a second electric rod 21 are provided above the bottom support frame 19, which are used to drive the fixed frame 2 to move horizontally, push the grinding belt 4 toward the sheet metal corners of the box-type substation, and when in contact with the sheet metal corners of the box-type substation, it is recessed into the right-angle platform, so that the grinding belt 4 is recessed into a right-angle grinding edge, and fully contacts the area to be polished of the sheet metal corners for precise grinding. At the same time, a combination of a first guide rail 18 and a first electric rod 22 are provided on both sides and inside of the bottom support frame 19, which are used to drive the fixed frame 2 to move up and down, so that the grinding belt 4 can move up and down along the sheet metal corners, and perform a comprehensive grinding process on the sheet metal corners.

[0052] like Figure 5-10 As shown, in order to achieve the synchronous change of the size of the right-angle platform and the extension and contraction of the grinding belt 4, the first displacement structure in the compensation component is used to drive the extension frame 11 to move, and can drive the driven pulley 8 to move synchronously. On the one hand, the extension frame 11 is moved at a right angle relative to the right-angle frame 9, so that a right-angle platform with adjustable size is formed between the extension frame 11 and the right-angle frame 9 to adapt to the sheet metal corners of the box-type substation. On the other hand, the driven pulley 8 is moved synchronously along the right-angle direction of the right-angle frame 9. By changing the gap between the two sets of driven pulleys 8, the belt surface of the grinding belt 4 close to the right-angle platform is extended or shortened to compensate for the deformation amount required for the grinding belt 4 to approach the right-angle platform. Specifically:

[0053] The first displacement structure includes a first screw rod 29 provided on both sides of the right angle of the right angle frame 9, and the first screw rod 29 is provided with a first wire sleeve 30 along its axial direction. A first bracket 7 is provided on one side of the first wire sleeve 30. The first bracket 7 is fixedly connected to the extension frame 11 and is rotatably connected to the driven pulley 8. By controlling the rotation of the first screw rod 29, its thread force is converted into a horizontal direction and transmitted to the first wire sleeve 30, pushing the first bracket 7 and the extension frame 11 to move synchronously along the right angle direction of the right angle frame 9. On the one hand, the extension frame 11 and the right angle frame 9 are staggered and overlapped to form a right angle platform of adjustable size. On the other hand, the spacing between the two groups of driven pulleys 8 on the first bracket 7 is changed, and the length of the grinding belt 4 close to the right angle platform is extended or shortened to adapt to the changing right angle platform and compensate for the deformation amount required for the grinding belt 4 to approach the right angle platform.

[0054] As a further solution of this embodiment, each group of first screw rods 29 is set to two. By setting the first screw rods 29 to two and providing a first gear 40 at one axial end thereof, the second gear 41 provided between the two first gears 40 is used to keep them in synchronous engagement, and the two first screw rods 29 are driven to rotate synchronously. When the two first screw rods 29 rotate, since the two first wire sleeves 30 on the screw rods are fixed as a whole through the first bracket 7, the rotational force thereof has the ability to be converted into horizontal thrust, which is transmitted to the first wire sleeves 30 respectively, pushing the first wire sleeves 30 to move, and the setting of the two screw rods can also play the role of arm force support, so that the first bracket 7 is more stable when moving.

[0055] Furthermore, the compensation component also includes a first motor 38 provided in the housing 3. The output end of the first motor 38 is provided with a driving bevel gear 36. The driving bevel gear 36 is engaged with a first driven bevel gear 37 provided at one end of the first screw rod 29. By controlling the first motor 38 to drive the driving bevel gear 36 to rotate, the meshing transmission of the driving bevel gear 36 and the first driven bevel gear 37 is utilized to push the first screw rod 29 to rotate, thereby generating a driving source that drives the extension frame 11 and the driven pulley 8 to move synchronously.

[0056] like Figure 5-Figure 9 、 Figure 11-12 As shown, in order to provide the required deformation amount when the grinding belt 4 is stretched and contracted, the second displacement structure in the compensation component is driven to drive the active pulley 6 to move synchronously with the driven pulley 8 to provide the required deformation amount of the concave right-angle platform of the grinding belt 4. Specifically:

[0057] The second displacement structure includes a second screw rod 33 arranged at a right angle to the right-angle frame 9 away from the first screw rod 29. The second screw rod 33 is provided with a second wire sleeve 34 along its axial direction. The other end of the second wire sleeve 34 is provided with a side support frame 31, and the second wire sleeve 34 is fixedly connected to the second bracket 5 through the side support frame 31. At the same time, the second bracket 5 is rotationally connected to the driving pulley 6. By controlling the rotation of the second screw rod 33, the thread force of the second screw rod 33 is converted into a horizontal transmission to the second wire sleeve 34, pushing the second bracket 5 to move, and then pushing the driving pulley 6 to move, so that the driving pulley 6 moves synchronously with the driven pulley 8, providing the deformation required for the extension and contraction of the grinding belt 4.

[0058] It should be noted that a second driven bevel gear 35 meshing with the driving bevel gear 36 is provided at one end of the second screw rod 33, and the transmission between the second screw rod 33 and the second driven bevel gear 35 is connected by meshing transmission between a third gear 42 provided on the second screw rod 33 and a fourth gear 43 provided on the second driven bevel gear 35. Since there is one set of driving pulleys 6 and two sets of driven pulleys 8, the deformation amount of the grinding belt 4 driven by the two sets of driven pulleys 8 is greater than the deformation amount of the grinding belt 4 driven by the one set of driving pulleys 6. Therefore, by designing the third gear 42 and the fourth gear 43 to have different gear transmission ratios, the second screw rod 33 is maintained in a differential transmission state relative to the first screw rod 29, so that a speed difference is generated between the displacement of the driving pulley 6 and the two sets of driven pulleys 8, resulting in a greater displacement change of the grinding belt 4 near the driving pulley 6, thereby providing the deformation amount required for the two sets of driven pulleys 8 to drive the grinding belt 4 to expand and contract. Since the meshing of the third gear 42 and the fourth gear 43 forms a driving force in opposite directions, the transmission of the second screw rod 33 and the second driven bevel gear 35 remains in opposite directions. Then, while the first motor 38 drives the active bevel gear 36 to rotate, the driving bevel gear 36 and the first driven bevel gear 37, the driving bevel gear 36 and the second driven bevel gear 35 are meshed. When the driving force is transmitted to the first screw rod 29 and the second screw rod 33, the first screw rod 29 and the second screw rod 33 are driven in opposite directions. Then, by setting the thread teeth of the second screw rod 33 to the opposite direction relative to the first screw rod 29, the second screw rod 33 drives the displacement of the second wire sleeve 34, and the first screw rod 29 drives the displacement of the first wire sleeve 30, maintaining the same direction displacement drive, so that the active pulley 6 and the driven pulley 8 move in the same direction, providing the deformation space required for the extension and contraction of the grinding edge of the grinding belt 4.

[0059] As a further solution of this embodiment, the second displacement structure also includes a screw 46 provided on one side of the side support frame 31, and is provided with at least one group. The screw 46 is provided with a screw sleeve 47 along its axial direction, and a compression spring 32 is sleeved on the screw 46. The compression spring 32 is fixed to the second bracket 5 and is rotatably connected to the screw sleeve 47. When the screw sleeve 47 moves along the screw 46, the elastic storage capacity is applied or released to the compression spring 32. When the extension frame 11 and the right-angle frame 9 are used to form a right-angle table with adjustable size, when the right-angle side of the right-angle table is larger, the grinding belt 4 is recessed to the length required for the right-angle table. The degree of tension is greater, at this time, the knob nut 47 is moved along the screw 46 (there is tension between the active pulley 6, the driven pulley 8, and the grinding belt 4, and the tensioning pressure is transmitted to the second bracket 5 through the active pulley 6, and a limit is imposed on the compression spring 32, so that when the nut 47 moves, it can be compressed or released), so that it moves away from the compression spring 32, and the elastic compression force of the compression spring 32 is released, so that the compression spring 32 maintains a larger elastic strain, providing a larger compression deformation space for the displacement of the active pulley 6, so that the concave pressure of the grinding belt 4 is transmitted to the active pulley When the driven pulley 6 is on, it drives the active pulley 6 to move, so that the grinding belt 4 on the side close to the active pulley 6 is the length required for its concave. On the contrary, when the right angle side of the right-angled platform is smaller, the length required for the grinding belt 4 to be concave to the right-angled platform is smaller. At this time, the reverse knob screw sleeve 47 is turned to compress the compression spring 32, so that it maintains a smaller elastic strain, providing a smaller compression deformation space for the displacement of the active pulley 6, providing the length required for the grinding belt 4 to be concave, and by adjusting the elastic strain of the compression spring 32, it provides the required length for the grinding belt 4 to be concave. , and can always maintain a maximized elastic compression state under the concave pressure of the grinding belt 4, so that when the size of the concave of the grinding belt 4 changes, the compression spring 32 always maintains its maximized elastic reset support to maintain the tension transmission characteristics between the driving pulley 6, the driven pulley 8, and the grinding belt 4. At the same time, the elastic support of the compression spring 32 on the driving pulley 6 can also play an auxiliary displacement role, so that when the grinding belt 4 close to the driven pulley 8 is extended or shortened, and the grinding belt 4 close to the driving pulley 6 cannot meet the required amount of its expansion and contraction, it provides a margin compensation effect.

[0060] Furthermore, a guide sleeve 44 is provided on the displacement path of the second thread sleeve 34, and a guide rod 45 is slidably connected in the guide sleeve 44. The guide rod 45 passes through the side support frame 31, the screw 46 and the second bracket 5, so that when the guide rod 45 slides along the guide sleeve 44, a rotation limit is imposed on the displacement of the side support frame 31, and a guide limit is imposed on the displacement of the second bracket 5. By utilizing the telescopic sliding combination of the guide sleeve 44 and the guide rod 45, on the one hand, a horizontal guide limit is provided for the side support frame 31 and the second thread sleeve 34, so that the second screw rod 33 has the ability to convert the thread force into horizontal force and transmit it to the second thread sleeve 34; on the other hand, it plays a guiding and supporting role, providing auxiliary support for the displacement of the second bracket 5, so that when the active pulley 6 on the second bracket 5 moves, it can be telescopically slid by the thrust of the second screw rod 33, and can also be telescopically slid by the elastic telescopic force of the compression spring 32.

[0061] The transmission of tension between the driving pulley 6, the driven pulley 8 and the grinding belt 4 is often greater than the friction between the grinding belt 4 and the sheet metal corners, and usually no slipping occurs. Figure 5-Figure 6 、 Figure 13-16 As shown, in order to achieve synchronous drive of the two groups of conveyor belts and the grinding belt 4, two groups of first conveyor belts 10 are staggered on the two side plates of the right-angle frame 9, and two groups of second conveyor belts 12 are staggered on the extension frame 11. The first conveyor belt 10 and the second conveyor belt 12 are in contact with the grinding belt 4 recessed into the right-angle table and rotate coaxially. On the one hand, the relative friction between the grinding belt 4 and the right-angle table is reduced. On the other hand, when the grinding belt 4 tends to stall due to excessive grinding intensity, a thrust is applied to the grinding belt 4 to maintain the grinding transmission state of the grinding belt 4. Specifically:

[0062] A second motor 39 is provided in the housing 3, and a driving shaft 13 is provided at the output end of the second motor 39, which serves as a driving source. On the one hand, the driving shaft 13 drives the grinding belt 4 to perform friction grinding. On the other hand, it drives the first conveyor belt 10 and the second conveyor belt 12 to rotate synchronously with the grinding belt 4, thereby reducing friction and assisting in pushing the grinding belt 4.

[0063] As a further solution of this embodiment, in order to realize the driving of the grinding belt 4, a third driven shaft 27 is provided on one side of the driving pulley 6, and a second transmission belt 28 is provided between the third driven shaft 27 and the driving pulley 6, and a first prismatic driven shaft 24 is provided on one side of the third driven shaft 27. The first prismatic driven shaft 24 is rotatably arranged on the second bracket 5 through the first support frame 25, and the first prismatic driven shaft 24 and the third driven shaft 27 are meshed through the second bevel gear pair 26. The first driven shaft 14 is sleeved on the first prismatic driven shaft 24 so that the two maintain coaxial transmission. The first driven shaft 14 is meshed with the driving shaft 13 through the first bevel gear pair 23. Then, when controlling the second When the motor 39 drives the driving shaft 13 to rotate, the engagement of the first bevel gear pair 23 is utilized to drive the first driven shaft 14 to rotate, and the coaxial transmission of the first driven shaft 14 and the first prismatic driven shaft 24 is synchronously driven, and then the engagement of the second bevel gear pair 26 is utilized to drive the third driven shaft 27 to rotate. The third driven shaft 27 drives the driving pulley 6 to rotate through the second transmission belt 28. The driving pulley 6 is used as the driving wheel, and the other two sets of driven pulleys 8 are used as driven wheels to drive the grinding belt 4. The belt surface of the concave right-angle table of the grinding belt 4 is used to frictionally grind the sheet metal corners of the box-type substation. The debris generated by grinding falls into the dust collecting trough 17 for collection under the action of gravity.

[0064] It should be noted that, since the first prismatic driven shaft 24 is slidably connected relative to the first driven shaft 14 , the first prismatic driven shaft 24 can always maintain coaxial rotation with the first driven shaft 14 when it moves with the driving pulley 6 on the second bracket 5 .

[0065] Furthermore, in order to realize the synchronous rotation of the two sets of conveyor belts and the grinding belt 4, a second driven shaft 16 is provided at a right angle to the right-angle frame 9. A first transmission belt 15 is provided between the second driven shaft 16 and the driving shaft 13, and is coaxially driven with the two sets of first conveyor belts 10. At the same time, a second prismatic driven shaft 48 mounted on the right-angle frame 9 is provided on the moving path of the extension frame 11. The second prismatic driven shaft 48 is meshed with the second driven shaft 16 through a third bevel gear pair 49, and the second prismatic driven shaft 48 is provided with a fourth bevel gear pair 50 along its axial sliding direction. The fourth bevel gear pair 50 is coaxial with the second conveyor belt 12. When the second motor 39 is controlled to drive the driving shaft 13 to rotate, The first transmission belt 15 is used to drive the second driven shaft 16 to rotate. When the second driven shaft 16 rotates, on the one hand, the first conveyor belt 10 is driven to operate, and on the other hand, the third bevel gear pair 49 is used to drive the second prismatic driven shaft 48 to rotate. The fourth bevel gear pair 50 provided on the second prismatic driven shaft 48 drives the second conveyor belt 12 to operate, so that the first conveyor belt 10 and the second conveyor belt 12 operate synchronously, and rotate synchronously with the grinding belt 4, reducing the friction between the grinding belt 4 and the right-angle table. At the same time, when the grinding belt 4 stalls and slows down due to excessive grinding load during the grinding process, auxiliary push can be applied to improve the grinding operation stability of the grinding belt 4.

[0066] It should be noted that, of the two sets of bevel gears of the fourth bevel gear pair 50, one set of bevel gears is provided on the second prismatic driven shaft 48, and the other set of bevel gears is provided on the second conveyor belt 12. Among them, one set of bevel gears provided on the second prismatic driven shaft 48 is rotationally connected to the second support frame 51, and the second support frame 51 is fixed to the extension frame 11, so that when the extension frame 11 moves, the driving bevel gears slide and rotate along the second prismatic driven shaft 48, and the other set of bevel gears is provided on the rotating shaft of the second conveyor belt 12. Since the second conveyor belt 12 also moves synchronously with the extension frame 11, the two sets of bevel gears always remain in a meshing state, so that the fourth bevel gear pair 50 has the characteristic of sliding and rotating drive along the second prismatic driven shaft 48, so that when the second conveyor belt 12 moves with the extension frame 11, it always maintains a synchronous transmission characteristic with the first conveyor belt 10.

[0067] The grinding belt 4 can be made of nylon anti-stretching sanding belt. Nylon anti-stretching sanding belt is a new type of grinding material with anti-stretching cloth as the backing. It is suitable for burr removal and polishing before and after machining of metal materials. It has elastic tensile properties when subjected to force, and the length required for the indentation of the grinding belt 4 mainly comes from the deformation length provided by the displacement of the driving pulley 6 and the driven pulley 8, and the deformation space provided by the compression deformation of the compression spring 32.

[0068] On the other hand, the present invention also provides a method for automatically grinding sheet metal corners of a box-type substation, such as Figure 17 As shown, the following steps are included:

[0069] Step 1: According to the size of the corners to be polished of the box-type substation, the extension frame 11 is controlled to move away from or close to the right-angle frame 9 so that the two form a right-angle platform of suitable size;

[0070] Step 2: Place the box-type substation on the polishing platform 55, and make the corners to be polished face the right angle of the right-angle frame 9, then adjust the orientation of the first right-angle plate 52 and the second right-angle plate 53 so that they fit with the box plates on both sides of the corners of the box-type substation, apply limit to them, and then control the pressure plate 54 to apply pressure to the box-type substation to position the box-type substation at three points;

[0071] Step 3: Based on the drive of the second electric rod 21, the right-angle frame 9 and the right-angle platform of the extension frame 11 are pushed toward the corner of the box-type substation and pressed against the corner. At this time, the grinding belt 4 is concave due to the resistance of the corner of the box-type substation, so that its outer grinding surface is close to the corner of the box-type substation, and its inner driving surface is close to the right-angle platform and fits with the first conveyor belt 10 and the second conveyor belt 12;

[0072] Step four, control the rotation of the grinding belt 4 so that its grinding contact part runs along the trajectory of the right-angle table, and the corners of the box-type substation are closely ground. Based on the drive of the first electric rod 22, the grinding belt 4 is pushed up and down, and moves along the corner line of the box-type substation to fully grind its corners. While the grinding belt 4 is running, it drives the first conveyor belt 10 and the second conveyor belt 12 to rotate synchronously, reducing the friction resistance of the grinding belt 4 in the right-angle table, and at the same time applying a stall thrust to the grinding belt 4.

[0073] In addition, please refer to Figure 17 The first right-angle plate 52, the second right-angle plate 53 and the pressing plate 54 are all moved by electric push rods to adapt to the limit fixing and grinding work of box-type substations of different sizes.

Claims

1. An automatic grinding device for sheet metal corners of a box-type substation, characterized in that: include: A grinding belt (4), wherein the grinding belt (4) is wound into a polygonal structure by a pulley, and one side of the polygonal structure serves as a grinding side; A right-angle frame (9), the right-angle frame (9) is located in the polygonal structure, the opening angle of the right-angle frame (9) is aligned with the polished edge, and the polished edge is pressed against the polished edge by using the metal corner of the box-type substation sheet metal so that the polished edge is attached to the right-angle frame (9), so that the polished edge forms a right-angle edge, and the right-angle edge presses and polishes the metal corner of the box-type substation sheet metal; A compensation structure, located within the polygonal structure, for compensating for the deformation of the polished edge into a right-angled edge; The right-angle frame (9) is aligned with the middle of the grinding edge, and the right-angle frame (9) is provided with two sets of extension frames (11) that overlap with the right-angle frame along the extension direction of the side plate thereof; The compensation structure includes a compensation component, which is arranged on a right-angle side of the right-angle frame (9) and is used to drive the extension frame (11) away from or close to the right-angle frame (9), and the extension frame (11) and the right-angle frame (9) form a right-angle platform with adjustable size; The compensation component comprises a first displacement structure for driving the extension frame (11) to move synchronously with the driven pulley (8) and a second displacement structure for driving the driving pulley (6) to move synchronously with the driven pulley (8); The compensation assembly further includes an active bevel gear (36) disposed between the first screw rod (29) and the second screw rod (33), wherein: The driving bevel gear (36) is meshed with a first driven bevel gear (37) provided at one end of the first screw rod (29), and the driving bevel gear (36) is meshed with a second driven bevel gear (35) provided at the other end of the second screw rod (33); The automatic grinding device for sheet metal corners of box-type substation also includes: A first conveyor belt (10), wherein the first conveyor belt (10) is provided in two groups and is arranged in a staggered manner on two side plates of the right-angle frame (9); The second conveyor belt (12) is provided in two groups, which are staggered with the first conveyor belt (10) and are provided on the extension frame (11), and rotate simultaneously with the first conveyor belt (10). When the grinding belt (4) is transformed into a right angle by the pressure of the metal corner of the box-type substation sheet metal, it contacts the first conveyor belt (10) and the second conveyor belt (12).

2. The automatic grinding device for sheet metal corners of a box-type substation according to claim 1 is characterized in that: The pulleys include a driving pulley (6) and two driven pulleys (8), the driving pulley (6) and the two driven pulleys (8) form a triangular structure of the grinding belt (4), and a grinding edge is formed between the two driven pulleys (8); The compensation component is also used to drive the driven pulley (8) and the driving pulley (6) to move synchronously with the extension frame (11).

3. The automatic grinding device for sheet metal corners of a box-type substation according to claim 1 is characterized in that: Also includes: A second driven shaft (16), the second driven shaft (16) is arranged at a right angle to the right-angle frame (9) and is coaxial with the two sets of first conveyor belts (10); The second prismatic driven shaft (48) is provided on the moving path of the extension frame (11) and is meshed with the second driven shaft (16) through the third bevel gear pair (49). The second prismatic driven shaft (48) is provided with a fourth bevel gear pair (50) along its axial sliding direction, and the fourth bevel gear pair (50) is coaxial with the second conveyor belt (12), so that when the second conveyor belt (12) moves relative to the first conveyor belt (10), the second conveyor belt (12) and the first conveyor belt (10) always keep synchronous rotation.

4. The automatic grinding device for sheet metal corners of a box-type substation according to claim 3 is characterized by: The first displacement structure includes: A first screw rod (29), wherein the first screw rod (29) is provided in two groups, each group being provided with two screw rods, the two groups of first screw rods (29) being provided at right angles to the right angle frame (9) at a ninety-degree angle, and the first screw rod (29) being provided with a first wire sleeve (30) along its axial direction; A first bracket (7), wherein the first bracket (7) is arranged on the first threaded sleeve (30), the threaded force of the first screw rod (29) is converted into a horizontal force and transmitted to the first threaded sleeve (30), thereby pushing the first bracket (7) to move, and the first bracket (7) is fixedly connected to the extension frame (11) and is rotationally connected to the driven pulley (8).

5. The automatic grinding device for sheet metal corners of a box-type substation according to claim 4 is characterized in that: The second displacement structure includes: A second screw rod (33), the second screw rod (33) is arranged at a right angle to the right-angle frame (9) away from the first screw rod (29), the second screw rod (33) is provided with a second thread sleeve (34) along its axial direction, and the other end of the second thread sleeve (34) is provided with a side support frame (31); The second bracket (5) is provided on the second threaded sleeve (34), the threaded force of the second screw rod (33) is converted into a horizontal force and transmitted to the second threaded sleeve (34), thereby pushing the second bracket (5) to move, and the second bracket (5) is fixedly connected to the second threaded sleeve (34) through the side support frame (31) and is rotationally connected to the driving pulley (6).

6. The automatic grinding device for sheet metal corners of a box-type substation according to claim 5 is characterized by: The second displacement structure further includes: A screw rod (46), wherein the screw rod (46) is provided on one side of the side support frame (31) and is provided in at least one group. The screw rod (46) is provided with a screw sleeve (47) along its axial direction; A compression spring (32), wherein the compression spring (32) can be sleeved on the screw rod (46), the compression spring (32) is fixed to the second bracket (5), and is rotatably connected to the screw sleeve (47), and when the screw sleeve (47) moves along the screw rod (46), the elastic storage capacity of the compression spring (32) is applied or released; The guide sleeve (44) is provided on the displacement path of the second thread sleeve (34), and a guide rod (45) is slidably connected in the guide sleeve (44). The guide rod (45) passes through the side support frame (31), the screw rod (46) and is fixed to the second bracket (5). When the guide rod (45) slides along the guide sleeve (44), a rotation limit is applied to the displacement of the side support frame (31), and a guide limit is applied to the displacement of the second bracket (5).

7. A method for automatically polishing sheet metal corners of a box-type substation, using the automatic polishing device for sheet metal corners of a box-type substation according to claim 6, characterized in that: The steps include: Step 1: According to the size of the corners to be polished of the box-type substation, the extension frame (11) is controlled to move away from or close to the right-angle frame (9), and the two form a right-angle platform of suitable size; Step 2: Place the box-type substation on the grinding platform (55), and make the corners to be ground face the right angle of the right-angle frame (9), then adjust the orientation of the first right-angle plate (52) and the second right-angle plate (53) so that they fit with the box plates on both sides of the corners of the box-type substation, apply a limit to them, and then control the pressure plate (54) to apply pressure to the box-type substation to position the box-type substation at three points; Step three, based on the drive of the second electric rod (21), the right-angle frame (9) and the right-angle platform of the extension frame (11) are pushed toward the corner of the box-type substation and pressed against the corner. At this time, the grinding belt (4) is concave due to the resistance of the corner of the box-type substation, so that its outer grinding surface is closely attached to the corner of the box-type substation, and its inner driving surface is closely attached to the right-angle platform and is in contact with the first conveyor belt (10) and the second conveyor belt (12); Step 4: Control the rotation of the grinding belt (4) so ​​that its grinding contact portion moves along the trajectory of the right-angle table, and perform close grinding on the corners of the box-type substation. Based on the drive of the first electric rod (22), the grinding belt (4) is pushed to move up and down, and moves along the corner line of the box-type substation to perform comprehensive grinding on its corners. While the grinding belt (4) is running, it drives the first conveyor belt (10) and the second conveyor belt (12) to rotate synchronously, thereby reducing the friction resistance of the grinding belt (4) in the right-angle table and applying a stall thrust to the grinding belt (4).

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