Oil coating and rust prevention treatment device for L-shaped part and using method of oil coating and rust prevention treatment device

Abstract

The invention belongs to the field of L-shaped part machining equipment, and relates to an L-shaped part oiling rust-proof treatment device and a using method thereof. A conveying mechanism is installed on the upper portion of a base frame, a pressing mechanism is arranged at the front end of the base frame and comprises an upper pressing mechanism body and a lower pressing mechanism body which are arranged in a front-back staggered mode, a saddle-shaped pressing block which moves up and down and is provided with a downward opening is arranged on the lower portion of the upper pressing mechanism body, and an inverted-V-shaped pressing block which moves up and down is arranged on the upper portion of the lower pressing mechanism body. The saddle-shaped pressing block and the inverted-V-shaped pressing block are matched with the L-shaped piece, an upper oiling block is arranged on the lower surface of the saddle-shaped pressing block, and a lower oiling block is arranged on the upper surface of the inverted-V-shaped pressing block. According to the use method of the oiling rust-proof treatment device, two thrust forces of the upper pressing mechanism and the lower pressing mechanism form a rotating torque, and the L-shaped part is attached to the conveying roller, so that the L-shaped part is smoothly conveyed forwards while being oiled. The device can be connected after an L-shaped part machining link, and oil coating and rust prevention treatment can be conducted on the L-shaped part while the L-shaped part is transferred.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of L-shaped piece processing equipment, and particularly relates to an L-shaped piece oiling and rust-proof treatment device and a use method thereof. BACKGROUND

[0002] With the continuous improvement of the automation degree of the steel processing industry, automatic equipment such as cutting and hole making has been widely applied in the metal workpiece processing and manufacturing process. The L-shaped piece is a common metal workpiece shape, such as angle steel, angle aluminum and the like of various specifications, which all belong to the L-shaped piece.

[0003] The processed L-shaped piece needs to be surface treated, and the existing L-shaped piece processing production line often cannot immediately perform surface treatment on the processed product, and needs to be uniformly treated after being stored for a period of time. During the storage process, the L-shaped piece is prone to rusting, which affects the use strength and appearance. For example, a large amount of angle steel is produced by a tower factory every day, and is usually directly stacked in an open-air site. After 24 hours, the L-shaped piece will begin to rust, and the intermediate storage time sometimes lasts for half a month, resulting in a high rusting rate of the L-shaped piece. In addition, due to the differences in the length, thickness and specifications of the L-shaped piece, the centralized rust removal of the L-shaped piece needs to be processed according to different specifications, which is time-consuming and labor-consuming, and increases the rust removal cost. SUMMARY

[0004] In order to solve the above technical problems, the application provides an L-shaped piece rust-proof treatment device for an L-shaped piece production line and a use method thereof, which can not only meet the automatic transfer of the L-shaped piece semi-finished product after processing, but also perform surface oiling and rust-proof treatment on the L-shaped piece semi-finished product during the transfer process. The technical scheme adopted by the application is as follows. An L-shaped piece oiling and rust-proof treatment device, comprising a base frame and a conveying mechanism, the conveying mechanism being fixedly installed at the upper length direction of the base frame, a pressing mechanism being arranged at the front end of the base frame, the pressing mechanism comprising an upper pressing mechanism and a lower pressing mechanism arranged in front of and behind each other, the lower pressing mechanism being located in front, and the L-shaped piece being located between the upper pressing mechanism and the lower pressing mechanism, a saddle-shaped pressing block capable of moving up and down and opening downward being arranged at the lower part of the upper pressing mechanism, an inverted V-shaped pressing block capable of moving up and down being arranged at the upper part of the lower pressing mechanism, the saddle-shaped pressing block and the inverted V-shaped pressing block being matched with the L-shaped piece, an upper oiling block being fixedly arranged on the lower surface of the saddle-shaped pressing block, and a lower oiling block being fixedly arranged on the upper surface of the inverted V-shaped pressing block.

[0005] Preferably, the lower pressing mechanism comprises a cross-shaped lower mounting frame, which comprises an upper connecting plate, a middle horizontal connecting plate and a lower connecting plate fixedly connected as a whole, the upper connecting plate is provided with a horizontal limiting plate extending outward at the top end of the rear side, a vertical supporting plate is fixedly arranged below the limiting plate, a pair of lower supporting blocks are fixedly arranged on the both sides of the supporting plate, the lower supporting frame is a rectangular frame structure, the inner side of the lower supporting frame is slidably connected with the pair of lower supporting blocks, a pair of vertical limiting columns are arranged in parallel at the middle position of the inner part of the lower supporting frame, the upper end of the limiting column is fixedly connected with the upper surface of the inner part of the lower supporting frame, a limiting hole is formed in the upper surface of the limiting plate, the lower end of the limiting column passes through the limiting hole, a spring is sleeved around the outer periphery of the limiting column between the upper surface of the limiting plate and the lower surface of the inner part of the lower supporting frame, the lower end of the spring abuts against the upper surface of the limiting plate, a reverse V-shaped pressing block is fixedly arranged at the top of the lower supporting frame, the reverse V-shaped pressing block is matched with the L-shaped piece, a lower oiling block is fixedly arranged on the upper surface of the reverse V-shaped pressing block, a cylinder connecting plate is fixedly arranged on the rear surface of the lower connecting plate, the end of the push rod of the horizontal push-pull cylinder is fixedly connected with the rear surface of the cylinder connecting plate, a horizontal moving block is fixedly arranged above the horizontal push-pull cylinder, a first slope structure is arranged at the front end of the horizontal moving block, a second slope structure is arranged at the rear surface of the lower end of the lower supporting frame, the first slope structure and the second slope structure are correspondingly matched.

[0006] Preferably, the upper pressing mechanism comprises a pair of L-shaped upper supporting frames, the lower part of the upper supporting frame is welded on the both sides of the upper rear end of the base frame, the upper part of the upper supporting frame is fixedly provided with a door-shaped upper mounting frame, the inner part of the upper mounting frame is fixedly provided with an upper pressing cylinder, the end of the telescopic rod of the upper pressing cylinder is fixedly provided with a downward-opening saddle-shaped pressing block matched with the L-shaped piece, the lower surface of the saddle-shaped pressing block is fixedly provided with an upper oiling block.

[0007] Preferably, the base frame is a rectangular frame structure formed by slot steel and steel plate, which comprises a pair of vertically arranged front and rear supporting legs, a pair of horizontal upper supporting beams are arranged in parallel on the upper part of the pair of vertical supporting legs, a driving motor mounting seat is fixedly arranged on the outer side of the rear vertical supporting leg, and the driving motor is fixedly mounted on the driving motor mounting seat.

[0008] Preferably, the conveying mechanism comprises roller mounting seats, conveying roller groups and roller drive chains, a plurality of groups of roller mounting seats are fixedly and symmetrically arranged on the upper surfaces of the pair of upper supporting beams, a conveying roller group is rotatably connected between a pair of roller mounting seats through a bearing seat, a bearing and a roller shaft, the conveying roller group comprises a pair of conveying rollers fixedly mounted on the roller shaft and a double-row sprocket located between the pair of conveying rollers, the conveying rollers are inclined conical wheels, and the pair of conveying rollers are oppositely arranged.

[0009] Preferably, the driving sprocket of the driving motor is drivingly connected with one side of the adjacent double-row sprocket through the roller drive chain, and the adjacent double-row sprockets are drivingly connected through the staggered roller drive chains.

[0010] Preferably, the upper oil coating block and the lower oil coating block are made of silica gel sponge soaked with rust-proof oil.

[0011] Preferably, a collecting box is arranged outside the front end of the base frame.

[0012] The use method of the aforementioned L-shaped piece oil coating rust-proof treatment device comprises the following steps: The L-shaped piece is placed at the rear end of the conveying mechanism, the conveying mechanism supports and forwards the L-shaped piece, and the L-shaped piece is conveyed to the middle of the upper oil coating block and the lower oil coating block. The upper pressing cylinder and the horizontal push-pull cylinder are started, the saddle-shaped pressing block moves downward, the horizontal push-pull cylinder moves backward to separate the first slope structure from the second slope structure, the spring is compressed, and the inverted V-shaped pressing block moves upward, so that the upper oil coating block on the saddle-shaped pressing block and the lower oil coating block on the inverted V-shaped pressing block clamp the upper and lower surfaces of the L-shaped piece, and the upper and lower surfaces of the L-shaped piece are subjected to oil coating rust-proof treatment.

[0013] Preferably, in the initial state, the piston rod of the upper pressing cylinder is upwardly retracted, the saddle-shaped pressing block is in the high position, the horizontal push-pull cylinder moves forward to close the first slope structure and the second slope structure, the spring is compressed, and the inverted V-shaped pressing block moves downward to the low position, so that the front end of the L-shaped piece can smoothly enter the middle of the upper oil coating block and the lower oil coating block.

[0014] The L-shaped piece rust-proof treatment device provided by the present application can directly connect to the processing link of the L-shaped piece, can perform oil coating rust-proof treatment on the L-shaped piece during transfer, does not affect the normal processing of the L-shaped piece, does not increase other processes, effectively reduces the labor intensity, improves the production quality, reduces the rust phenomenon of the L-shaped piece product, and prolongs the safe storage period of the L-shaped piece. BRIEF DESCRIPTION OF DRAWINGS

[0015] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, illustrate the present application together with the embodiments thereof, and explain the present application, but do not constitute a limitation of the present application. In the drawings: Figure 1 is a perspective structural schematic view of the rust-proof treatment device of the first embodiment of the present application; Figure 2 is a back structural schematic view of the rust-proof treatment device of the first embodiment of the present application; Figure 3 is a perspective structural schematic view of the base frame of the first embodiment of the present application; Figure 4 is an installation schematic view of the driving motor of the first embodiment of the present application; Figure 5 is a perspective structural schematic view of the conveying mechanism of the first embodiment of the present application;​ Figure 6 is the schematic diagram of the transmission link of the conveying roller set of the first embodiment of the application; Figure 7 is the front view structural diagram of the conveying roller set of the first embodiment of the application; Figure 8 is the installation schematic diagram of the upper pressing mechanism of the first embodiment of the application; Figure 9 is the exploded structural diagram of the upper pressing mechanism of the first embodiment of the application; Figure 10 is the installation schematic diagram of the lower pressing mechanism of the first embodiment of the application; Figure 11 is the exploded structural diagram of the lower pressing mechanism of the first embodiment of the application; Figure 12 is the principle diagram of the pressing mechanism of the second embodiment of the application; In the figure, 1 is a base frame, 2 is a conveying mechanism, 3 is an L-shaped piece, 4 is a vertical support leg, 5 is an upper support beam, 6 is a driving motor mounting seat, 7 is a driving motor, 8 is a conveying roller set, 9 is a roller mounting seat, 10 is a roller driving chain, 11 is a conveying roller, 12 is a double-row sprocket, 13 is an upper support frame, 14 is an upper mounting frame, 15 is an upper pressing cylinder, 16 is a saddle-shaped pressing block, 17 is an upper oiling block, 18 is a lower mounting frame, 19 is an inverted V-shaped pressing block, 20 is a lower oiling block, 21 is a lower support frame, 22 is a spring, 23 is a lower support block, 24 is a cylinder connecting plate, 25 is a horizontal push-pull cylinder, 26 is a horizontal moving block, 27 is a first slope structure, 28 is a second slope structure, 29 is a limiting plate, 30 is a support plate, 31 is a slide rail, 32 is a slide groove, and 33 is a limiting hole. DETAILED DESCRIPTION

[0016] The technical solutions of the application will be described clearly and completely below in combination with the drawings. Obviously, the described embodiments are part of the embodiments of the application, rather than all the embodiments.

[0017] In the embodiments of the application, the front / rear is referred to the advancing direction of the L-shaped piece 3. Embodiment one

[0018] As shown in Figure 1 , 2 , Figure 2The L-shaped piece 3 is hidden, and the L-shaped piece oiling and rust-proof treatment device provided by the embodiment one of the application comprises a base frame 1, a pressing mechanism and a conveying mechanism 2. The pressing mechanism and the conveying mechanism 2 are fixedly installed on the upper portion of the base frame 1, the pressing mechanism is arranged at the front end of the base frame 1, the L-shaped piece 3 is firstly placed at the rear end of the conveying mechanism 2, the conveying mechanism 2 conveys the L-shaped piece 3 to the pressing mechanism, the pressing mechanism performs pressing and oiling and rust-proof treatment on the L-shaped piece 3, and the L-shaped piece 3 after the oiling and rust-proof treatment enters the next process. For example, a collecting box can be arranged outside the front end of the base frame 1, and the L-shaped piece 3 after the oiling and rust-proof treatment is stored in the collecting box.

[0019] As shown in Figure 3 , 4 , the base frame 1 is a rectangular cuboid frame structure which is spliced by channel steel and steel plate, comprising a pair of front and rear parallel vertical support legs 4, a pair of upper support beams 5 which are fixedly welded on the upper portions of the vertical support legs 4 and are arranged in a horizontal direction and relative to each other in parallel. The outer side of one vertical support leg 4 at the rear end is fixedly provided with a driving motor mounting seat 6, and the driving motor mounting seat 6 is provided with an outward extension structure relative to the vertical support leg 4. The driving motor mounting seat 6 with the extension structure can provide a large enough space for firmly installing the driving motor 7.

[0020] As shown in Figure 5 , 6As shown in FIG. 7, the conveying mechanism comprises a roller mounting seat 9, a conveying roller set 8 and a roller drive chain 10. A plurality of sets of roller mounting seats 9 are symmetrically and fixedly installed on the upper surface of a pair of upper support beams 5 in pairs, and each set of roller mounting seats 9 is uniformly arranged along the length direction of the upper support beam 5. A conveying roller set 8 is rotatably connected between a pair of roller mounting seats 9 through a bearing seat, a bearing and a roller shaft, the bearing seat is fixedly installed on the adjacent side surface of a pair of roller mounting seats 9 through bolts, the bearing seat is provided with a bearing, and the bearing seat is rotatably connected with the roller shaft through the bearing. The conveying roller set 8 comprises a pair of conveying rollers 11 and a double-row sprocket 12 fixedly installed on the roller shaft, the conveying roller 11 is a conical wheel, and the conical wheel can be made of rubber or metal material with a rubber layer on the inclined surface to further increase the friction between the conveying roller 11 and the L-shaped piece 3. The pair of conveying rollers 11 are oppositely arranged, the upward extension lines of the inclined surfaces of the pair of conveying rollers 11 form an angle of about 90°, the upper surface of the pair of conveying rollers 11 can stably place the overturned L-shaped piece 3, and the double-row sprocket 12 is fixedly arranged on the roller shaft between the pair of conveying rollers 11. For the pair of conveying rollers 11 at the non-end part, one side of the double-row sprocket 12 between the pair of conveying rollers 11 is drivingly connected with the same side of the double-row sprocket 12 adjacent to the front of the pair of conveying rollers 11 through the roller drive chain 10, and the other side of the double-row sprocket 12 between the pair of conveying rollers 11 is drivingly connected with the same side of the double-row sprocket 12 between the pair of conveying rollers 11 adjacent to the rear through the roller drive chain 10. For the pair of conveying rollers 11 at the same end as the driving motor 7, one side of the double-row sprocket 12 between the pair of conveying rollers 11 is drivingly connected with the driving sprocket on the output shaft of the driving motor 7 through the roller drive chain 10. The staggered connection mode of the roller drive chain 10 on the double-row sprocket 12 can maintain high transmission efficiency.

[0021] The pressing mechanism comprises an upper pressing mechanism and a lower pressing mechanism arranged in front and back, and the lower pressing mechanism is located in front. Figure 8 、 Figure 9 As shown in FIG. 8, the upper pressing mechanism comprises a pair of L-shaped upper support frames 13, the lower part of the upper support frame 13 is welded on both sides of the rear end of the upper support beam 5, and the L-shaped structure of the upper support frame 13 matches the channel steel structure of the upper support beam 5 to make the welding of the upper support frame 13 more stable; an upper mounting frame 14 in a door shape is fixedly arranged on the upper part of the upper support frame 13 through bolts, an upper pressing cylinder 15 is fixedly installed in the upper mounting frame 14, the upper pressing cylinder 15 is fixedly installed below the top plate of the upper mounting frame 14 through bolts, an open downward saddle-shaped pressing block 16 is fixedly installed on the end part of the telescopic rod of the upper pressing cylinder 15, the opening size of the saddle-shaped pressing block 16 matches the L-shaped piece 3, and a pair of upper oiling blocks 17 are fixedly arranged on the lower surface of the saddle-shaped pressing block 16, and the upper oiling block 17 can be a silica gel sponge soaked in rust-proof oil.

[0022] As Figure 10 , Figure 11 shown, the lower pressing mechanism includes a lower mounting frame 18, which is a cross-shaped structure including an upper connecting plate, a middle horizontal connecting plate and a lower connecting plate fixed as one body. The middle horizontal connecting plate of the lower mounting frame 18 is fixedly installed on the lower surface of the front end of the upper support beam 5 by bolts. The upper connecting plate of the lower mounting frame 18 is located between the pair of upper support beams 5. The lower connecting plate of the lower mounting frame 18 is located below the upper support beam 5 (the upper connecting plate is symmetrically located below the lower connecting plate).

[0023] The top end of the rear surface of the upper connecting plate of the lower mounting frame 18 extends outwardly and is provided with a horizontal limiting plate 29. A vertical support plate 30 is fixedly arranged below the limiting plate 29. The support plate 30 is fixedly connected with the rear surface of the upper connecting plate. A lower support block 23 is fixedly installed on the left and right sides of the support plate 30. The lower support frame 21 is a rectangular box structure. The height of the lower support frame 21 is greater than the width. The lower support frame 21 is slidably connected with the pair of lower support blocks 23. The lower support frame 21 can move up and down relative to the lower support blocks 23. A pair of vertical sliding rails 31 parallel to each other are arranged at the inner sides of the lower support frame 21. A sliding groove 32 matched with the sliding rails 31 is formed on the lower support block 23. The sliding rails 31 and the sliding groove 32 realize the sliding connection between the lower support frame 21 and the lower support block 23. A pair of vertical limiting columns parallel to each other are arranged at the middle position of the inner part of the lower support frame 21. The upper end of the limiting column is fixedly connected with the upper surface of the inner part of the lower support frame 21. A limiting hole 33 is formed in the limiting plate 29. The lower end of the limiting column passes through the limiting hole 33. A spring 22 is arranged around the limiting column between the upper surface of the limiting plate 29 and the lower surface of the inner part of the lower support frame 21. The upper end of the spring 22 is fixedly connected with the lower surface of the inner part of the lower support frame 21. The diameter of the limiting hole 33 is smaller than the diameter of the spring 22. The lower end of the spring 22 abuts against the upper surface of the limiting plate 29. A reverse V-shaped pressing block 19 is fixedly arranged on the top of the lower support frame 21. The size of the reverse V-shaped pressing block 19 is matched with the L-shaped piece 3. A lower oiling block 20 is fixedly arranged on the upper surface of the reverse V-shaped pressing block 19. The lower oiling block 20 can be made of silica gel sponge soaked with rust-proof oil.

[0024] A cylinder connecting plate 24 is fixedly arranged on the rear surface of the lower connecting plate of the lower mounting frame 18. The push rod end of a horizontal push-pull cylinder 25 is fixedly connected with the rear surface of the cylinder connecting plate 24. A horizontal moving block 26 is fixedly installed above the horizontal push-pull cylinder 25. A first slope structure 27 with an upward angle is arranged on the front end of the horizontal moving block 26. A second slope structure 28 with a downward angle is arranged on the rear surface of the lower end of the lower support frame 21. The first slope structure 27 and the second slope structure 28 correspond to and match with each other. Example Two

[0025] The method for using the L-shaped piece oiling and rust prevention treatment device described in the first embodiment includes the following steps: In the initial state, the piston rod of the upper clamping cylinder 15 is retracted upward, the saddle-shaped pressure block 16 is in a high position, and the horizontal push-pull cylinder 25 moves forward to close the first slope structure 27 and the second slope structure 28, the spring 22 is compressed, and the inverted V-shaped pressure block 19 moves downward to a low position, so that the front end of the L-shaped part 3 can smoothly enter between the upper clamping mechanism and the lower clamping mechanism.

[0026] When conveying the L-shaped member 3 , the L-shaped member 3 is first placed at the rear end of the conveying mechanism 2 , and then turned upside down on the conveying roller set 8 , so that the inclined surfaces of the conveying rollers 11 fit the L-shaped member 3 .

[0027] Start the drive motor 7, and the active sprocket on the drive motor 7 drives several groups of conveying rollers 8 to rotate synchronously through the roller drive chain 10. The conveying rollers 11 support and push the L-shaped part 3 forward, and convey the L-shaped part 3 to the middle of the upper oiling block 17 and the lower oiling block 20.

[0028] The upper clamping cylinder 15 and the horizontal push-pull cylinder 25 are activated simultaneously. The piston rod stroke of the upper clamping cylinder 15 can be pre-set based on the thickness of the L-shaped member 3. Then, the saddle-shaped pressure block 16 moves downward a certain distance, while the horizontal push-pull cylinder 25 moves backward, separating the first ramp structure 27 from the second ramp structure 28. The elastic force of the spring 22 causes the inverted V-shaped pressure block 19 to move upward. Ultimately, the upper oiling block 17 on the saddle-shaped pressure block 16 and the lower oiling block 20 on the inverted V-shaped pressure block 19 clamp the upper and lower surfaces of the L-shaped member 3, simultaneously applying oil to the L-shaped member 3 to prevent rust.

[0029] A collection box can be provided in front of the base frame 1, and the L-shaped pieces 3 treated with oil and rust prevention will fall into the collection box for stacking. Since the surface of the L-shaped pieces 3 is coated with an anti-rust oil layer, the product rust phenomenon is reduced and the storage period of the L-shaped pieces 3 is extended.

[0030] like Figure 12 As shown, the upper and lower pressing mechanisms are not positioned opposite each other vertically. Instead, the lower pressing mechanism presses the L-shaped member 3 forward, while the upper pressing mechanism presses the L-shaped member 3 backward. This positioning design allows the upper and lower thrusts exerted by the upper and lower pressing mechanisms to form a rotational torque, allowing the L-shaped member 3 to fit more stably on the conveying roller 11, increasing friction and ensuring smooth forward conveyance of the L-shaped member 3.

[0031] The downward pressing mechanism selects the spring 22 to push upward. If a vertical pushing cylinder is arranged to directly push the inverted V-shaped pressing block 19 upward, the pushing force of the vertical pushing cylinder cannot be accurately controlled, and the L-shaped piece 3 can be lifted due to too large pushing force, so that the L-shaped piece 3 cannot be normally forwarded. Therefore, the embodiment of the present application uses the spring 22 to cooperate with the horizontal pushing and pulling cylinder 25 and the slope structure to push the L-shaped piece 3 upward, and the elastic force of the spring 22 cannot be too large, so that the L-shaped piece 3 can be smoothly forwarded while being oiled on the surface.

[0032] In the embodiment of the present application, the technical features not described in detail are prior art or conventional technical means, which will not be described here.

[0033] Finally, it should be noted that: the above embodiments are only specific embodiments of the present application, which are used to illustrate the technical solutions of the present application, but not to limit it. The protection scope of the present application is not limited to this. Those skilled in the art should understand that: any person skilled in the art can modify or easily think of changes to the technical solutions recorded in the above embodiments within the technical range disclosed by the present application, or make equivalent replacement to some technical features; and these modifications, changes or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be covered in the protection scope of the present application.

Claims

1. An L-shaped piece oiling and rust prevention treatment device, comprising a base frame and a conveying mechanism, wherein the conveying mechanism is fixedly mounted on the upper longitudinal direction of the base frame, characterized in that: The clamping mechanism is arranged at the front end of the base frame, and the clamping mechanism includes an upper clamping mechanism and a lower clamping mechanism which are staggered front and back. The lower clamping mechanism is located in the front, and the L-shaped part is located between the upper and lower clamping mechanisms. A saddle-shaped pressure block with an opening downward that can move up and down is arranged at the lower part of the upper clamping mechanism, and an inverted V-shaped pressure block that can move up and down is arranged at the upper part of the lower clamping mechanism. The saddle-shaped pressure block and the inverted V-shaped pressure block cooperate with the L-shaped part. An upper oiling block is fixedly provided on the lower surface of the saddle-shaped pressure block, and a lower oiling block is fixedly provided on the upper surface of the inverted V-shaped pressure block.

2. The L-shaped piece oiling and rust prevention treatment device according to claim 1, characterized in that: The top of described supporting plate is hinged on the base plate, is fixed with the support frame, is fixed with the support frame at the bottom, and is fixed with the support frame of base bottom four, to guarantee that base bottom four can be fixed with the support frame of base bottom four. A spring is mounted on the outer periphery of the limit column between the upper surface and the lower surface of the lower support frame, and the lower end of the spring abuts the upper surface of the limit plate. An inverted V-shaped pressure block is fixedly arranged on the top of the lower support frame, and the inverted V-shaped pressure block cooperates with the L-shaped piece. A lower oil block is fixedly arranged on the upper surface of the inverted V-shaped pressure block, and a cylinder connecting plate is fixedly arranged on the rear surface of the lower connecting plate. The push rod end of the horizontal push-pull cylinder is fixedly connected to the rear side of the cylinder connecting plate. A horizontal moving block is fixedly installed above the horizontal push-pull cylinder, and a first slope structure is arranged at the front end of the horizontal moving block. A second slope structure is extended backward on the rear side of the lower end portion of the lower support frame, and the first slope structure and the second slope structure correspond to and cooperate with each other.

3. The L-shaped piece oiling and rust prevention treatment device according to claim 2, characterized in that: The upper clamping mechanism includes a pair of upper support frames with L-shaped structures, the lower parts of the upper support frames are welded to both sides of the upper rear end of the base frame, the upper part of the upper support frames is fixedly provided with an upper mounting frame with a door structure, the interior of the upper mounting frame is fixedly provided with an upper clamping cylinder, the end of the telescopic rod of the upper clamping cylinder is fixedly provided with a saddle-shaped clamping block with an opening facing downward, the saddle-shaped clamping block cooperates with the L-shaped part, and the lower surface of the saddle-shaped clamping block is fixedly provided with an upper oiling block.

4. The L-shaped piece oiling and rust prevention treatment device according to claim 3, characterized in that: The base frame is a rectangular frame structure welded by channel steel and steel plates, including a pair of vertical support legs arranged parallel to each other in the front and rear, a pair of horizontal upper support beams arranged parallel to the upper part of the pair of vertical support legs, and a drive motor mounting seat fixedly arranged on the outer side of a vertical support leg at the rear end, and the drive motor is fixedly installed on the drive motor mounting seat.

5. The L-shaped piece oiling and rust prevention treatment device according to claim 4, characterized in that: The conveying mechanism includes a roller mounting seat, a conveying roller group and a roller drive chain. Several groups of roller mounting seats are evenly distributed and symmetrically fixed on the upper surface of a pair of upper support beams. A conveying roller group is rotatably connected between the pair of roller mounting seats through a bearing seat, a bearing and a roller shaft. The conveying roller group includes a pair of conveying rollers fixedly mounted on the roller shaft and a double-row sprocket located between the pair of conveying rollers. The conveying rollers are oblique conical wheels, and the pair of conveying rollers are arranged back to back.

6. The L-shaped piece oiling and rust prevention treatment device according to claim 5, characterized in that: The driving sprocket of the driving motor is linked to one side of the adjacent double-row sprocket through a roller driving chain, and the other adjacent double-row sprockets are linked to each other through staggered roller driving chains.

7. The L-shaped piece oiling and rust prevention treatment device according to claim 3, characterized in that: The upper oiling block and the lower oiling block are made of silicone sponge soaked in anti-rust oil.

8. The L-shaped piece oiling and rust prevention treatment device according to claim 3, characterized in that: A collection box is arranged on the outer side of the front end of the base frame.

9. The method for using the L-shaped piece oiling and rust prevention treatment device according to claim 3, characterized in that: The following steps are involved: Place the L-shaped piece at the rear end of the conveying mechanism, which supports and conveys the L-shaped piece forward until it is between the upper and lower oiling blocks; Start the upper clamping cylinder and the horizontal push-pull cylinder, the saddle-shaped pressure block moves downward, and the horizontal push-pull cylinder moves backward to separate the first slope structure from the second slope structure. The elastic force of the spring causes the inverted V-shaped pressure block to move upward, so that the upper oil block on the saddle-shaped pressure block and the lower oil block on the inverted V-shaped pressure block clamp the upper and lower surfaces of the L-shaped part, and at the same time, the upper and lower surfaces of the L-shaped part are oiled for rust prevention.

10. The method for using the L-shaped piece oiling and rust prevention treatment device according to claim 9, characterized in that: In the initial state, the piston rod of the upper clamping cylinder is retracted upward, the saddle-shaped pressure block is in a high position, the horizontal push-pull cylinder moves forward to close the first slope structure and the second slope structure, the spring is compressed, and the inverted V-shaped pressure block moves downward to a low position, so that the front end of the L-shaped part can smoothly enter between the upper oil-coating block and the lower oil-coating block.

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