Surface treatment process of penetrating cylinder for papermaking drying equipment

Abstract

The invention discloses a surface treatment process of a penetrating cylinder for papermaking drying equipment, and relates to the technical field of grinding of penetrating cylinder surface treatment, and the surface treatment process comprises the following specific steps: step 1, polishing and grinding; step 2, cleaning; and step 3, polishing and passivating treatment. By means of the surface treatment process, welding protruding tumor points or residual welding slag on the outer wall of the cylinder body of the penetrating cylinder and metal burrs generated by punching operation can be well polished and removed; special grinding equipment is further designed according to the process, and the grinding device is provided with a moving mechanism, so that the outer wall of the penetrating inner cylinder is conveniently and automatically ground through a grinding disc; and by arranging the mounting mechanism, mounting operation of the polishing frame is achieved, meanwhile, the polishing frame can be driven to move along the outer wall of the cylinder body through operation of the first motor and the fourth motor, and polishing operation is conducted on the outer wall penetrating through the inner cylinder.

Description

Technical Field

[0001] The invention relates to the technical field of polishing of penetration cylinder surface treatment, in particular to a surface treatment process of a penetration cylinder used in papermaking drying equipment. Background Art

[0002] When producing the penetration cylinder of a papermaking machine, it is first necessary to cut and punch the plate according to the size of the penetration inner cylinder, then curl the penetration inner cylinder into a cylindrical shape, and weld the joint of the cylindrical workpiece to form a cylinder body. Two retaining rings are welded at both ends of the welded outer wall of the cylinder body, and the inner shaft is inserted into the cylinder body. One end of the L-shaped bracket is welded to the inner shaft, and the other end of the L-shaped bracket passes through the through hole of the cylinder body and is welded to the retaining ring on the outer wall of the cylinder body, thereby realizing the coaxial arrangement of the cylinder body and the inner shaft. During the processing of the cylinder body, the punching operation will produce metal burrs, and the welding operation will produce raised nodules and residual welding slag. The above defects all need to be surface treated to overcome. The surface treatment process is mainly based on grinding operations. However, due to the large volume of the penetration inner cylinder of the papermaking equipment, the labor intensity of manual grinding is high and it is easy to produce deviations, which will not only affect the grinding effect of the penetration inner cylinder, but also affect the molding size of the cylinder body. In order to achieve the purpose of conveniently grinding the outer wall of the penetration inner cylinder, a surface treatment process for the penetration cylinder of papermaking drying equipment is provided. Summary of the invention

[0003] The purpose of the present invention is to provide a surface treatment process for a penetrating cylinder used in a papermaking drying device in order to facilitate the grinding treatment of the outer wall of the penetrating inner cylinder.

[0004] To achieve the above object, the present invention provides the following technical solution: a surface treatment process of a penetration cylinder for papermaking drying equipment, the specific steps are as follows: Step 1: Polishing and grinding: Use a grinding device to grind the outer wall of the inner cylinder to remove the protruding nodules or residual welding slag, as well as the metal burrs generated by the punching operation; Step 2: Cleaning: Clean and remove impurities adhering to the outside of the penetrating inner cylinder; Step 3: Polishing and passivation; The penetrating inner cylinder is composed of a cylinder body and an inner shaft, wherein the cylinder body is coaxially fixed to the outside of the inner shaft through an L-shaped frame, and a through hole is opened on the outer peripheral wall of the cylinder body; The grinding device used in the step 1 includes a placement rack for placing the penetrated inner cylinder and a grinding rack that can be installed on the outside of the cylinder body, a grinding disc is installed on the grinding rack, the grinding rack is installed on the cylinder body through a mounting mechanism, and the grinding disc is moved by a moving mechanism.

[0005] The top end of the driving member is connected with the driving member by the spring, and the top end of the driving member is connected with the driving member by the spring, and the transmission gear ...

[0006] As a further solution of the present invention: the moving mechanism includes a moving seat, the moving seat is slidably connected to the outer wall of the grinding frame, a second motor is installed at one end of the grinding frame, the output end of the second motor is connected to a threaded rod running through the moving seat, the interior of the moving seat is slidably connected to a movable frame, the interior of the moving seat is slidably connected to a fixed block located on one side of the movable frame, a third spring is connected between the fixed block and the moving seat, the outer wall of the fixed block is fixedly connected to a pulling frame extending from the moving seat, and a fixing groove is provided on one side of the outer wall of the movable frame.

[0007] As a further solution of the present invention: the moving mechanism also includes a first bevel gear, the grinding disc is rotatably connected to the outer wall of the movable frame, the first bevel gear is fixedly connected to one end of the grinding disc, the interior of the movable frame is located at the outer wall of the first bevel gear and is rotatably connected to the second bevel gear, the top of the second bevel gear is fixedly connected to a rotating shaft, the top of the rotating shaft is fixedly connected to a first spur gear, the interior of the movable frame is located at the outer wall of the first spur gear and is rotatably connected to the second spur gear, the bottom end of the second spur gear is fixedly connected to the first docking plate, a third motor is installed inside the movable seat, and the output end of the third motor is connected to the second docking plate.

[0008] As a further solution of the present invention: the inner wall of the movable groove is in contact with the outer wall of the movable rod, the inner wall of the movable groove is provided with ratchet teeth, and one end of the clamping block is engaged with the ratchet teeth.

[0009] As a further solution of the present invention: a first inclined surface is arranged at the bottom end of the block, the upper end of the extrusion rod contacts the first inclined surface, a second inclined surface is arranged at the bottom end of the extrusion rod, and the inner wall of the groove fits the outer wall of the extrusion rod.

[0010] As a further solution of the present invention: a threaded hole is provided on the outer wall of the movable seat, and the threaded hole matches the threaded rod.

[0011] As a further solution of the present invention: the outer wall of one end of the fixing block is in contact with the inner wall of the fixing groove, the first docking plate and the second docking plate are fixedly connected with a docking block on one side close to each other, and the docking blocks on the first docking plate and the second docking plate can be plugged into and engaged with each other; the first spur gear is meshed with the second spur gear, and the first bevel gear is meshed with the second bevel gear.

[0012] As a further solution of the present invention: the top end of the placement rack is fixedly connected with a clamping seat by bolts, and the clamping seat can clamp and fix the two ends of the inner shaft on the placement rack.

[0013] As a further solution of the present invention: the outer wall of the placement rack is fixedly connected with an annular rack, the outer wall of the mounting seat is provided with an arc groove for the annular rack to slide, a fourth motor is installed inside the mounting seat, the output shaft of the fourth motor is connected with a third spur gear extending to the inner cavity of the arc groove, and the third spur gear is meshed with the inner ring tooth groove of the annular rack.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The surface treatment process described in the present invention can properly grind away the weld protrusions or residual welding slag on the outer wall of the cylinder body that penetrates the cylinder, as well as the metal burrs generated by the punching operation; the present invention also designs special grinding equipment according to the process. The grinding device is provided with a moving mechanism to push the movable frame downward to move, and the displacement of the movable frame drives the grinding disc to move. When the grinding disc contacts the outer wall of the cylinder body, the fixed block engages into the fixed groove to fix the movable frame. At this time, the first docking disc docks with the second docking disc, and then the third motor is started to drive the grinding disc to rotate. The grinding disc rotates to grind the outer wall of the cylinder body. The operation of the second motor drives the grinding disc to move horizontally, so that the outer wall of the inner cylinder is automatically polished by the grinding disc.

[0015] 2. The grinding device places the grinding frame on the top of the cylinder body by setting up a mounting mechanism, the outer wall of the mounting seat contacts the two ends of the cylinder body, the upper wheel contacts the outer wall of the cylinder body, and pushes the displacement seat to slide under the movable rod. The lower wheel moves into the inner cavity of the cylinder body, pushing the movable rod to slide into the movable groove, and the lower wheel moves and contacts the inner wall of the cylinder body, so that the grinding frame is installed on the outer wall of the cylinder body, and then the annular guiding effect of the annular rack and the auxiliary driving and locking effect of the third spur gear and the fourth motor are used to realize the installation operation of the grinding frame. At the same time, the first motor and the fourth motor can be used to drive the grinding frame to move along the outer wall of the cylinder body to perform a grinding operation on the outer wall that penetrates the inner cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the grinding device of the present invention; Figure 2 It is a structural schematic diagram of a grinding frame of the grinding device of the present invention; Figure 3 It is a schematic diagram of the structure of the mounting base of the grinding device of the present invention; Figure 4 This is a schematic diagram of the internal structure of the mounting base of the grinding device of the present invention; Figure 5 It is a schematic diagram of the internal structure of the movable rod of the grinding device of the present invention; Figure 6 It is a schematic diagram of the installation of the movable seat of the grinding device of the present invention; Figure 7 A schematic diagram of the internal structure of the movable seat of the grinding device of the present invention; Figure 8 A schematic diagram of the internal structure of the movable frame of the grinding device of the present invention; Fig. 9 It is a schematic structural diagram of the first docking plate and the second docking plate of the grinding device of the present invention; Fig.10 It is a schematic structural diagram of the annular rack of the present invention.

[0017] In the figure: 1, cylinder; 2, inner shaft; 3, L-shaped frame; 4, placement frame; 5, grinding frame; 6, grinding disc; 7, mounting mechanism; 701, mounting seat; 702, upper wheel; 703, movable groove; 704, movable rod; 705, T-shaped block; 706, T-shaped groove; 707, displacement seat; 708, clamping block; 709, first spring; 710, extrusion rod; 711, second spring; 712, groove; 713, first motor; 714, connecting shaft; 715, lower wheel; 8, moving mechanism; 801, moving seat; 8 02, the second motor; 803, the threaded rod; 804, the movable frame; 805, the fixed block; 806, the third spring; 807, the pulling frame; 808, the fixed groove; 809, the first bevel gear; 810, the second bevel gear; 811, the rotating shaft; 812, the first spur gear; 813, the second spur gear; 814, the first docking plate; 815, the second docking plate; 816, the third motor; 9, the docking block; 10, the clamping seat; 11, the annular gear; 12, the arc groove; 13, the third spur gear; 14, the fourth motor. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is an explanation of an embodiment of the present invention based on the overall structure of the present invention.

[0020] See also Figures 1 to 10In the embodiment of the present invention, the surface treatment process of the penetration cylinder for papermaking drying equipment comprises the following specific steps: Step 1: Polishing and grinding: Use a grinding device to grind the outer wall of the inner cylinder to remove the protruding nodules or residual welding slag, as well as the metal burrs generated by the punching operation; Step 2: Cleaning: Clean and remove impurities adhering to the outside of the penetrating inner cylinder; Step 3: Polishing and passivation.

[0021] The penetrating inner cylinder is composed of a cylinder body 1 and an inner shaft 2. The cylinder body 1 is coaxially fixed to the outside of the inner shaft 2 through an L-shaped frame 3. A through hole is opened on the outer peripheral wall of the cylinder body 1.

[0022] The grinding device used in the step 1 includes a placement rack 4 for placing the penetrated inner cylinder, and a grinding rack 5 that can be installed on the outside of the cylinder body 1, and a grinding disc 6 is installed on the grinding rack 5. The grinding rack 5 is installed on the cylinder body 1 through a mounting mechanism 7, and the grinding disc 6 is moved by a moving mechanism 8.

[0023] In this embodiment: when grinding the penetrating inner cylinder, the penetrating inner cylinder is placed on the placement rack 4, and then the grinding rack 5 is installed on the outer wall of the cylinder body 1 through the installation mechanism 7, and the grinding operation is performed through the grinding disc 6.

[0024] Please refer to Figures 1 to 5 The mounting mechanism 7 includes a mounting seat 701, which is fixedly connected to the bottom of both ends of the grinding frame 5. The outer wall of the mounting seat 701 is rotatably connected to two upper wheels 702. The bottom end of the mounting seat 701 is provided with a movable groove 703, and the inner wall of the movable groove 703 is slidably connected with a movable rod 704. The bottom end of the movable rod 704 is fixedly connected with a T-shaped block 705. A displacement seat 707 is provided below the movable rod 704. The top of the displacement seat 707 is provided with a T-shaped groove 706 for the T-shaped block 705 to slide. The inner sliding connection of the movable rod 704 A block 708 is connected to the outer wall of the movable rod 704, a first spring 709 is connected between the block 708 and the movable rod 704, an extrusion rod 710 is slidably connected to the interior of the movable rod 704 below the block 708, a second spring 711 is connected between the extrusion rod 710 and the movable rod 704, a groove 712 is provided at the bottom end of the inner wall of the T-slot 706, a first motor 713 is installed at one end of the displacement seat 707, a connecting shaft 714 is connected to the output end of the first motor 713, and a lower wheel 715 is fixedly connected to one end of the connecting shaft 714.

[0025] In this embodiment: when the grinding frame 5 is installed, the block 708 is located in the movable rod 704, the first spring 709 and the second spring 711 are both in an extruded state, the grinding frame 5 is placed above the cylinder body 1, the outer wall of the mounting seat 701 contacts the two ends of the cylinder body 1, the upper wheel 702 contacts the outer wall of the cylinder body 1, and the displacement seat 707 is pushed to slide under the movable rod 704, and the displacement of the displacement seat 707 drives the lower wheel 715 to move into the inner cavity of the cylinder body 1. At this time, the movable rod 704 moves and drives the extrusion rod 710 to move to the groove 712. The extrusion rod 710 is engaged into the groove 712 by the elastic force of the second spring 711, and the extrusion rod 710 and the block 7 08 is separated, and the block 708 is displaced by the elastic force of the first spring 709 and contacts the inner wall of the movable groove 703. At this time, the movable rod 704 can be pushed to slide into the movable groove 703, and the block 708 is engaged with the inner wall of the movable groove 703 to prevent the movable rod 704 from moving in the opposite direction. The movable rod 704 is displaced through the displacement seat 707 to drive the lower wheel 715 to move and contact the inner wall of the cylinder body 1, so that the grinding frame 5 is installed on the outer wall of the cylinder body 1. At this time, the first motor 713 can be started, and the operation of the first motor 713 drives the connecting shaft 714 to rotate, and the rotation of the connecting shaft 714 drives the lower wheel 715 to rotate, and the rotation of the lower wheel 715 drives the grinding frame 5 to move along the outer wall of the cylinder body 1.

[0026] When the grinding frame 5 is dismantled, the displacement seat 707 is pushed to move and drive the lower wheel 715 to move out of the inner cavity of the cylinder body 1. At this time, the extrusion rod 710 is displaced out of the groove 712 by force. The displacement of the extrusion rod 710 pushes the block 708 to move into the movable rod 704 and separate from the movable groove 703, thereby canceling the positioning of the movable rod 704, and then the grinding frame 5 is disassembled.

[0027] Please refer to Figures 6 to 9The moving mechanism 8 includes a moving seat 801, which is slidably connected to the outer wall of the grinding frame 5. A second motor 802 is installed at one end of the grinding frame 5. The output end of the second motor 802 is connected to a threaded rod 803 that runs through the moving seat 801. The inside of the moving seat 801 is slidably connected to a movable frame 804. The inside of the moving seat 801 is slidably connected to a fixed block 805 located on one side of the movable frame 804. A third spring 806 is connected between the fixed block 805 and the moving seat 801. The outer wall of the fixed block 805 is fixedly connected to a pulling frame 807 extending from the moving seat 801. A fixing groove 808 is provided on one side of the outer wall of the movable frame 804. The moving mechanism 8 also includes a first bevel gear 809, the grinding disc 6 is rotatably connected to the outer wall of the movable frame 804, the first bevel gear 809 is fixedly connected to one end of the grinding disc 6, the interior of the movable frame 804 is located at the outer wall of the first bevel gear 809 and is rotatably connected to the second bevel gear 810, the top of the second bevel gear 810 is fixedly connected to the rotating shaft 811, the top of the rotating shaft 811 is fixedly connected to the first spur gear 812, the interior of the movable frame 804 is located at the outer wall of the first spur gear 812 and is rotatably connected to the second spur gear 813, the bottom end of the second spur gear 813 is fixedly connected to the first docking plate 814, the interior of the movable seat 801 is installed with a third motor 816, and the output end of the third motor 816 is connected to the second docking plate 815.

[0028] In this embodiment, when grinding the outer wall of the cylinder body 1, the movable frame 804 is pushed downward to move, and the displacement of the movable frame 804 drives the grinding disc 6 to move. When the grinding disc 6 contacts the outer wall of the cylinder body 1, the fixed block 805 contacts the fixed groove 808, and the fixed block 805 is engaged into the fixed groove 808 by the elastic force of the third spring 806, and the movable frame 804 is fixed. At this time, the first docking plate 814 and the second docking plate 815 are docked, and then the third motor 816 can be started, and the operation of the third motor 816 drives the second docking plate 815 to dock. The second docking plate 815 rotates to drive the first docking plate 814 to rotate, the first docking plate 814 rotates to drive the second spur gear 813 to rotate, the second spur gear 813 rotates to drive the first spur gear 812 to rotate, the first spur gear 812 rotates to drive the rotating shaft 811 to rotate, the rotating shaft 811 rotates to drive the second bevel gear 810 to rotate, the second bevel gear 810 rotates to drive the first bevel gear 809 to rotate, the first bevel gear 809 rotates to drive the grinding disc 6 to rotate, the grinding disc 6 rotates to grind the outer wall of the cylinder body 1, The second motor 802 can be started while the grinding operation is in progress. The second motor 802 can drive the threaded rod 803 to rotate in the forward and reverse directions by running forward and reversely. The rotation of the threaded rod 803 drives the movable seat 801 to move back and forth. The displacement of the movable seat 801 drives the grinding disc 6 to move back and forth horizontally, so that the outer wall that penetrates the inner cylinder can be automatically ground by the grinding disc 6 (the rotation time and reversing timing of the second motor 802 can be controlled by program setting, so that the reciprocating movement of the movable seat 801 can avoid the L-shaped frame 3, so that the two will not interfere with each other).

[0029] Please refer to Figures 1 to 5 The inner wall of the movable groove 703 is in contact with the outer wall of the movable rod 704 . A ratchet is provided on the inner wall of the movable groove 703 , and one end of the clamping block 708 is engaged with the ratchet.

[0030] In this embodiment, the movable rod 704 is pushed to slide into the movable groove 703, and the block 708 is engaged with the ratchet teeth of the movable groove 703 to prevent the movable rod 704 from moving in the reverse direction.

[0031] Please refer to Figures 1 to 5 The bottom end of the block 708 is provided with a first inclined surface, the upper end of the extrusion rod 710 is in contact with the first inclined surface, the bottom end of the extrusion rod 710 is provided with a second inclined surface, and the inner wall of the groove 712 is in contact with the outer wall of the extrusion rod 710.

[0032] In this embodiment: pushing the displacement seat 707 to move drives the lower wheel 715 to move out of the inner cavity of the cylinder body 1. At this time, the extrusion rod 710 is forced to move out of the groove 712. The displacement of the extrusion rod 710 pushes the block 708 to move into the movable rod 704 and separate from the movable groove 703, thereby canceling the positioning of the movable rod 704.

[0033] Please refer to Figures 6 to 9 The outer wall of the movable seat 801 is provided with a threaded hole, and the threaded hole matches the threaded rod 803 .

[0034] In this embodiment, the second motor 802 operates to drive the threaded rod 803 to rotate, and the rotation of the threaded rod 803 drives the moving base 801 to move.

[0035] Please refer to Figures 6 to 9 , the outer wall of one end of the fixing block 805 is in contact with the inner wall of the fixing groove 808 .

[0036] In this embodiment: the movable frame 804 is pushed to move, and the displacement of the movable frame 804 drives the grinding disc 6 to move. When the grinding disc 6 contacts the outer wall of the cylinder body 1, the fixed block 805 contacts the fixed groove 808. The fixed block 805 is engaged into the fixed groove 808 by the elastic force of the third spring 806, and the movable frame 804 is fixed. The fixed block 805 can be driven out of the fixed groove 808 by moving the pulling frame 807 to cancel the fixation of the movable frame 804.

[0037] Please refer to Figures 6 to 9 The first docking plate 814 and the second docking plate 815 are fixedly connected with a docking block 9 on one side close to each other, and the docking blocks 9 on the first docking plate 814 and the second docking plate 815 can be plugged and engaged with each other; the first spur gear 812 is meshed with the second spur gear 813, and the first bevel gear 809 is meshed with the second bevel gear 810.

[0038] In this embodiment: the first docking plate 814 and the second docking plate 815 are docked with each other through the docking block 9, and the third motor 816 can be started at this time. The operation of the third motor 816 drives the second docking plate 815 to rotate, and the rotation of the second docking plate 815 drives the first docking plate 814 to rotate. The rotation of the first docking plate 814 drives the second spur gear 813 to rotate, and the rotation of the second spur gear 813 drives the first spur gear 812 to rotate. The rotation of the first spur gear 812 drives the rotating shaft 811 to rotate, and the rotation of the rotating shaft 811 drives the second bevel gear 810 to rotate. The rotation of the second bevel gear 810 drives the first bevel gear 809 to rotate.

[0039] Please refer to Figures 1 to 10 The top of the placement frame 4 is fixedly connected with a "J"-shaped pressing seat 10 by bolts. The pressing seat 10 can press and fix the two ends of the inner shaft 2 on the placement frame 4. The two ends of the pressing seat 10 are fixed on the placement frame 4 by bolts. The outer wall of the placement frame 4 is fixedly connected with an annular rack 11. The outer wall of the mounting seat 701 is provided with an arc groove 12 for the annular rack 11 to slide. The fourth motor 14 is installed inside the mounting seat 701. The output shaft of the fourth motor is connected with a third spur gear 13 extending to the inner cavity of the arc groove 12. The annular rack 11 is inserted into the arc groove 12 and is slidably fitted therewith. The third spur gear 13 is meshed with the inner ring tooth groove of the annular rack 11.

[0040] In this embodiment: the inner shaft 2 is pressed against the placement frame 4 by the clamping seat 10, which can prevent the cylinder body 1 and the inner shaft 2 from rotating during the grinding process; when the mounting seat 701 needs to move, the first motor 713 drives the lower wheel 715 to roll along the inner wall of the cylinder body 1 through the connecting shaft 714; at the same time, the fourth motor 14 is started, and the fourth motor 14 drives the third spur gear 13 to rotate, and the third spur gear 13 is meshed with the inner ring tooth groove of the annular rack 11, and synchronously drives the mounting seat 701 to move in a circular manner along the annular rack 11. When the mounting seat 701 drives the grinding frame 5 to stop at a certain busbar position of the cylinder body 1, the fourth motor 14 can lock the third spur gear 13, so that it can stably stop at a specific preset position of the annular rack 11. After the grinding disc 6 is reciprocated and ground along the position of the busbar, the mounting seat 701 drives the grinding frame 5 and the grinding disc 6 to continue to move in a circular manner. This design can prevent the grinding frame 5 and the mounting seat 701 from slipping, and make the grinding operation more stable.

[0041] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. The surface treatment process of the penetration cylinder for papermaking drying equipment is characterized in that: The specific steps are as follows: Step 1: Polishing and grinding: Use a grinding device to grind the outer wall of the inner cylinder to remove the protruding nodules or residual welding slag, as well as the metal burrs generated by the punching operation; Step 2: Cleaning: Clean and remove impurities adhering to the outside of the penetrating inner cylinder; Step 3: Polishing and passivation; The penetrating inner cylinder is composed of a cylinder body (1) and an inner shaft (2), wherein the cylinder body (1) is coaxially fixed to the outside of the inner shaft (2) via an L-shaped frame (3), and a through hole is opened on the outer peripheral wall of the cylinder body (1); The grinding device used in the step 1 comprises a placement frame (4) for placing the penetrated inner cylinder, and a grinding frame (5) that can be mounted on the outside of the cylinder body (1), a grinding disc (6) being mounted on the grinding frame (5), the grinding frame (5) being mounted on the cylinder body (1) via a mounting mechanism (7), and the grinding disc (6) being moved via a moving mechanism (8).

2. The surface treatment process of the penetration cylinder for papermaking drying equipment according to claim 1 is characterized in that: The mounting mechanism (7) comprises a mounting seat (701), wherein the mounting seat (701) is fixedly connected to the bottom of both ends of the grinding frame (5), the outer wall of the mounting seat (701) is rotatably connected to two upper wheels (702), the bottom end of the mounting seat (701) is provided with a movable groove (703), the inner wall of the movable groove (703) is slidably connected to a movable rod (704), the bottom end of the movable rod (704) is fixedly connected to a T-shaped block (705), a displacement seat (707) is arranged below the movable rod (704), the top end of the displacement seat (707) is provided with a T-shaped groove (706) for the T-shaped block (705) to slide, and the inside of the movable rod (704) is slidably connected to a A block (708) extends to the outer wall of the movable rod (704), a first spring (709) is connected between the block (708) and the movable rod (704), an extrusion rod (710) is slidably connected to the inside of the movable rod (704) below the block (708), a second spring (711) is connected between the extrusion rod (710) and the movable rod (704), a groove (712) is provided at the bottom end of the inner wall of the T-shaped slot (706), a first motor (713) is installed at one end of the displacement seat (707), an output end of the first motor (713) is connected to a connecting shaft (714), and one end of the connecting shaft (714) is fixedly connected to a lower wheel (715).

3. The surface treatment process for the penetration cylinder for papermaking drying equipment according to claim 2 is characterized in that: The moving mechanism (8) comprises a moving seat (801), the moving seat (801) being slidably connected to the outer wall of the grinding frame (5), a second motor (802) being mounted on one end of the grinding frame (5), an output end of the second motor (802) being connected to a threaded rod (803) penetrating the moving seat (801), a movable frame (804) being slidably connected inside the moving seat (801), a fixed block (805) being slidably connected inside the moving seat (801) and located on one side of the movable frame (804), a third spring (806) being connected between the fixed block (805) and the moving seat (801), a pulling frame (807) extending from the moving seat (801) being fixedly connected to the outer wall of the fixed block (805), and a fixing groove (808) being provided on one side of the outer wall of the movable frame (804).

4. The surface treatment process for the penetration cylinder for papermaking drying equipment according to claim 3 is characterized in that: The moving mechanism (8) further comprises a first bevel gear (809); the grinding disc (6) is rotatably connected to the outer wall of the movable frame (804); the first bevel gear (809) is fixedly connected to one end of the grinding disc (6); a second bevel gear (810) is rotatably connected to the outer wall of the first bevel gear (809) inside the movable frame (804); a rotating shaft (811) is fixedly connected to the top of the second bevel gear (810); a first spur gear (812) is fixedly connected to the top of the rotating shaft (811); a second spur gear (813) is rotatably connected to the outer wall of the first spur gear (812) inside the movable frame (804); a first docking plate (814) is fixedly connected to the bottom end of the second spur gear (813); a third motor (816) is installed inside the movable seat (801); and the output end of the third motor (816) is connected to the second docking plate (815).

5. The surface treatment process for the penetration cylinder for papermaking drying equipment according to claim 4 is characterized in that: The inner wall of the movable groove (703) is in contact with the outer wall of the movable rod (704); a ratchet is provided on the inner wall of the movable groove (703); and one end of the clamping block (708) is clamped with the ratchet.

6. The surface treatment process for the penetration cylinder for papermaking drying equipment according to claim 5 is characterized in that: The bottom end of the clamping block (708) is provided with a first inclined surface, the upper end of the extrusion rod (710) is in contact with the first inclined surface, the bottom end of the extrusion rod (710) is provided with a second inclined surface, and the inner wall of the groove (712) is in contact with the outer wall of the extrusion rod (710).

7. The surface treatment process for the penetration cylinder for papermaking drying equipment according to claim 4 is characterized in that: The outer wall of the movable seat (801) is provided with a threaded hole, and the threaded hole matches the threaded rod (803).

8. The surface treatment process for the penetration cylinder for papermaking drying equipment according to claim 4 is characterized in that: The outer wall of one end of the fixing block (805) is fitted with the inner wall of the fixing groove (808); the first docking plate (814) and the second docking plate (815) are fixedly connected with a docking block (9) on their sides close to each other; the docking blocks (9) on the first docking plate (814) and the second docking plate (815) can be plugged into and engaged with each other; the first spur gear (812) is meshed with the second spur gear (813); and the first bevel gear (809) is meshed with the second bevel gear (810).

9. The surface treatment process for the penetration cylinder for papermaking drying equipment according to claim 4, characterized in that: The top end of the placement rack (4) is fixedly connected to a clamping seat (10) via bolts, and the clamping seat (10) can clamp and fix the two ends of the inner shaft (2) on the placement rack (4).

10. The surface treatment process for the penetration cylinder for papermaking drying equipment according to claim 4, characterized in that: The outer wall of the placement rack (4) is fixedly connected to an annular rack (11), the outer wall of the mounting seat (701) is provided with an arc groove (12) for the annular rack (11) to slide, a fourth motor (14) is installed inside the mounting seat (701), the output shaft of the fourth motor is connected to a third spur gear (13) extending to the inner cavity of the arc groove (12), and the third spur gear (13) is meshed with the inner ring tooth groove of the annular rack (11).

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