Adjustable magnetic permanent conveyor bed and lifting method

Abstract

This invention relates to an adjustable magnetic permanent magnet conveying bed and a lifting method, comprising a conveying bed with a lifting permanent magnet plate below it. The lifting permanent magnet plate includes a permanent magnet plate and a lifting mechanism, which drives the permanent magnet plate to rise or fall. The permanent magnet plate includes a permanent magnet plate bracket, a magnet fixing plate, multiple magnets, multiple support rods, a grid-like anti-slip plate, and a panel. The magnet fixing plate is located on the permanent magnet plate bracket, and the grid-like anti-slip plate is fixed to the magnet fixing plate. Multiple magnets are embedded in the grids of the grid-like anti-slip plate. The plates between the grids and the magnet fixing plate have through holes for the support rods. The upper ends of the multiple support rods contact the panel, and the lower ends of the multiple support rods are supported by the permanent magnet plate bracket. Multiple lifting nuts are fixed on the magnet fixing plate, and multiple lifting screws are screwed to the multiple lifting nuts. A sprocket is fixed on the lifting screw, and the sprocket on the lifting screw is driven by a drive chain to drive the magnet fixing plate and magnets in the permanent magnet plate to rise or fall synchronously.

Description

Technical Field

[0001] This invention relates to an adjustable magnetic permanent magnet conveyor bed and lifting method, which can manually or automatically adjust the attraction between the permanent magnet plate and the workpiece according to the size of the workpiece, and can also digitally display the distance between the permanent magnet plate and the workpiece through a lifting sensor. It belongs to the field of permanent magnet conveyor bed manufacturing. Background Technology

[0002] There are three traditional types of magnetic conveyor beds: First, electromagnetic conveyor beds. When the conveyor bed area is large, the power consumption is high, and when the equipment operates continuously for 24 hours, the coils overheat and the electromagnetic coils are prone to burning out. Second, permanent magnet conveyor beds. The main problem is that the magnetism cannot be adjusted. When encountering large workpieces, the large contact area between the workpiece surface and the permanent magnet results in excessive attraction, causing the conveyor belt to slip and unable to move the workpiece. When encountering small workpieces, the small contact area between the workpiece surface and the permanent magnet results in insufficient attraction, making processing impossible. Third, electro-permanent magnet conveyor beds, which use electric triggering and are technically suitable for sanding machines, are extremely expensive. Large magnetic plates for large equipment would be prohibitively expensive. Furthermore, in terms of structural design, there is a gap between the magnet and the workpiece. Utilizing the principle that carbon steel is magnetically conductive, the conveyor can move back and forth between the gap and the carbon steel plate. The magnetism is strongest when the magnet is on the carbon steel plate and weakest when it is on the gap. However, the overall structure is very complex. It requires a lot of force to move the magnet left and right to detach it from the carbon steel plate. The magnetic strength cannot be displayed as quantitative data, and the overall reliability and durability are not very good. Summary of the Invention

[0003] Design objective: To overcome the shortcomings of the prior art, and to design an adjustable magnetic permanent magnet conveyor bed and lifting method that can meet the positioning and processing needs of both large and small workpieces, prevent the conveyor belt from being unable to move large workpieces, and significantly reduce manufacturing costs.

[0004] Design Scheme: To achieve the above design objectives, the present invention features the following structural design: 1. The design of setting a lifting permanent magnet plate below the conveyor bed is one of the technical features of the present invention. The purpose of this design is that, since the lifting permanent magnet plate includes a permanent magnet plate and a lifting mechanism, the lifting mechanism can drive the permanent magnet plate to rise or fall. When the workpiece on the conveyor belt (bed) is large and light (thin plate), the lifting mechanism drives the permanent magnet plate to rise, so that the workpiece is firmly attracted by the permanent magnet plate without affecting the dragging of the conveyor belt; when the workpiece on the conveyor belt (bed) is large and heavy, the controller or operator drives the permanent magnet plate to fall through the lifting mechanism based on the downward pressure generated by the weight of the workpiece, so that the workpiece is firmly attracted by the permanent magnet plate without affecting the dragging of the conveyor belt; when the workpiece on the conveyor belt (bed) is small and light (thin plate), the lifting mechanism drives the permanent magnet plate to rise, so that the workpiece is firmly attracted by the permanent magnet plate without affecting the dragging of the conveyor belt; when the workpiece on the conveyor belt (bed) is small and heavy, the lifting mechanism drives the permanent magnet plate to rise, so that the workpiece is firmly attracted by the permanent magnet plate without affecting the dragging of the conveyor belt. The controller uses a PLC controller. Since the PLC controller has a built-in weight calculator, area calculator, and permanent magnet plate attraction data, it can automatically collect the weight and area of ​​the workpiece on the conveyor belt and calculate the amount of the permanent magnet plate's rise or fall based on these measurements. This ensures the workpiece is in the most optimal attraction state—that is, the workpiece is processed while being conveyed by the conveyor belt and remains completely still. 2. The design of the grid-like magnetic anti-slip plate is the second technical feature of this invention. The purpose of this design is that the workpieces being processed vary in size and weight. If a single permanent magnet is used as the permanent magnet plate, and the workpiece surface completely covers the permanent magnet plate, the workpiece will not shift. However, when the workpiece surface is smaller than the permanent magnet plate, the workpiece will shift under the influence of the N and S poles of the permanent magnet plate and cannot be reliably attracted, thus preventing processing. In the design of the permanent magnet plate, this invention uses the smallest workpiece surface that the equipment can process as a reference surface larger than the permanent magnet surface. Based on this standard, the base plate used for positioning the permanent magnets is designed as a grid-like structure. A permanent magnet is then placed in each grid to form a magnetic substrate. This solves the defect of workpiece surfaces smaller than any of the permanent magnet surfaces on the magnetic substrate, resulting in no positioning. This allows the smallest workpiece surface set by the equipment to be processed smoothly and firmly attracted by the permanent magnet plate under dynamic conditions (in the conveying state). 3. The design of having support rod through holes on the plate between grids, with the upper ends of multiple support rods contacting the panel and the lower ends of the multiple support rods supported by a magnetic fixing plate, is the third technical feature of this invention.The purpose of this design is as follows: Since the permanent magnet plate panel is a magnetically conductive plate, only a relatively thin plate can be used to ensure magnetic conductivity. However, thin plates lack rigidity and are prone to bending. Therefore, this invention has multiple support rod through holes in the plate between the grids. The upper ends of multiple support rods contact the thin plate (panel panel), while the lower ends of multiple support rods are supported by a magnet fixing plate. This ensures the flatness and rigidity of the thin plate (panel panel), satisfying both the requirements for magnetic conductivity and rigidity and flatness, while also allowing the magnetic substrate to rise or fall freely. 4. The synchronous four-wheel lifting mechanism is the fourth technical feature of this invention. The purpose of this design is as follows: Since multiple lifting nuts are fixed on the magnet fixing plate, and the lifting nuts are designed with a boss flange structure to increase the depth of the internal screw, the lifting amount of the lifting screw can meet the lifting distance required by the permanent magnet plate. Therefore, when multiple lifting screws are screwed to multiple lifting nuts respectively, the sprocket fixed on the lifting screw drives the multiple lifting nuts located on the back of the magnet fixing plate to rise or fall synchronously with the drive chain, thereby achieving the design purpose of this invention.

[0005] Technical Solution 1: An adjustable magnetic permanent magnet conveying bed includes a conveying bed with a lifting permanent magnet plate below it. The lifting permanent magnet plate includes a permanent magnet plate and a lifting mechanism, which drives the permanent magnet plate to rise or fall. The permanent magnet plate includes a permanent magnet plate bracket, a magnet fixing plate, multiple magnets, multiple support rods, a grid-like magnetic anti-slip plate, and a panel. The magnet fixing plate is located inside the permanent magnet plate bracket. The grid-like magnetic anti-slip plate is fixed to the magnet fixing plate. Multiple magnets are embedded in the grids of the grid-like magnetic anti-slip plate. Support rod through holes are opened on the plate between the grids. The upper ends of the multiple support rods are respectively in contact with the panel, and the lower ends of the multiple support rods are supported by the permanent magnet plate bracket. Multiple lifting nuts are fixed on the magnet fixing plate. Multiple lifting screws are respectively screwed to the multiple lifting nuts. A sprocket is fixed on the lifting screw, and the sprocket on the lifting screw is driven by a drive chain to rise or fall synchronously. The drive chain is driven by a lifting drive reducer, which is driven by a handwheel.

[0006] Technical Solution 2: A lifting method for an adjustable magnetic permanent magnet conveyor bed. The operator manually adjusts the handwheel or the lifting drive reducer driven by the motor according to the size of the workpiece being processed. The reducer drives the drive chain through the sprocket transmission mechanism. The drive chain drives multiple sets of lifting rods to rise or fall synchronously, thereby driving the permanent magnet plate to rise or fall. When the attraction force of the permanent magnet plate reaches the set value, the lifting sensor will detect the signal and transmit it to the display screen or trigger a voice prompt, so that the permanent magnet plate can firmly attract the workpiece being processed.

[0007] Compared with the prior art, this invention has the following advantages: First, the permanent magnet plate is designed as a grid-inlaid permanent magnet plate, which satisfies both the need for large-area workpieces to be firmly attracted and processed under conveying dynamics and the need for small-area workpieces to be firmly attracted and processed under conveying dynamics. Second, the design of the support rod relying on the permanent magnet plate bracket at the lower end and supporting the panel at the upper end satisfies the magnetic permeability requirement of the permanent magnet plate and solves the rigidity and flatness requirements of the panel, while also realizing the free lifting or lowering of the magnetic substrate. Third, the synchronous four-wheel lifting mechanism enables the magnet fixing plate and the magnet in the permanent magnet plate to rise or fall synchronously. Fourth, the controller has a built-in weight calculator, area calculator, and permanent magnet plate attraction data conversion design, which realizes the automatic conversion of the weight and area of ​​the workpiece collected on the automatic collection conveyor belt, and calculates the rising and falling amount of the permanent magnet plate based on the weight and area of ​​the workpiece, thereby enabling the actuator to put the workpiece in the most reasonable attraction state. Attached Figure Description

[0008] Figure 1 This is a top view schematic diagram of an adjustable magnetic permanent magnet conveyor bed.

[0009] Figure 2 yes Figure 1 A side view structural diagram.

[0010] Figure 3 yes Figure 2 Enlarged structural diagram of section C.

[0011] Figure 4 yes Figure 1 3D schematic diagram.

[0012] Figure 5 This is a schematic diagram of a grid plate inlaid with permanent magnets. Detailed Implementation

[0013] Example 1: Refer to Appendix Figure 1-5An adjustable magnetic permanent magnet conveyor bed includes a conveyor bed with a lifting permanent magnet plate located below it. The lifting permanent magnet plate comprises a permanent magnet plate and a lifting mechanism, which drives the permanent magnet plate to rise or fall. The permanent magnet plate includes a permanent magnet plate bracket 1, a magnet fixing plate 2, multiple magnets 3, multiple support rods 4, a grid-like anti-slip plate 5, and a panel 6. The magnet fixing plate 2 is located inside the permanent magnet plate bracket 1, and the grid-like anti-slip plate 5 is fixed to the magnet fixing plate 2. The multiple magnets 3 are embedded in the grid of the grid-like anti-slip plate 5. Inside, the plates between the grids and the magnet fixing plate 2 have through holes for support rods. The upper ends of multiple support rods 4 are in contact with the panel 6, and the lower ends of the multiple support rods 4 are supported by the magnet fixing plate 2. Multiple lifting nuts 11 are fixed on the magnet fixing plate 2, and multiple lifting screws 10 are screwed to the multiple lifting nuts 11. The sprocket is fixed on the lifting screw 10, and the sprocket on the lifting screw 10 is driven by the drive chain 7 to rise or fall synchronously. The drive chain 7 is driven by the lifting drive reducer 8, and the lifting drive reducer is driven by the handwheel 9. The lower ends of the multiple support rods 4 have a boss-like structure. One end of the multiple support rods 4 is connected to the panel 6, and the other end is fixed to the permanent magnet bracket 1. The protruding part of the boss is inserted into the hole in the magnet fixing plate 2. The drive chain 7 is equipped with a tension sprocket. The setting of the tension sprocket is existing technology and will not be described here. The lifting sensor 12 is set inside the permanent magnet plate bracket 1, and its signal input terminal is connected to the display screen or PLC controller. PLC controllers are existing technology and will not be discussed here.

[0014] Example 2: Based on Example 1, a lifting method for an adjustable magnetic permanent magnet conveyor bed is provided. The operator manually adjusts the handwheel 9 or drives the lifting drive reducer 8 by a motor according to the size of the workpiece being processed. The reducer 8 drives the drive chain 7 through a sprocket transmission mechanism. The drive chain 7 drives multiple sets of lifting rods 10 to rise or fall synchronously, thereby driving the permanent magnet plate to rise or fall. When the attraction force of the permanent magnet plate reaches the set value, the lifting sensor will detect the signal and transmit it to the display screen or trigger a voice prompt, so that the permanent magnet plate can firmly attract the workpiece being processed.

[0015] It should be understood that although the above embodiments provide a relatively detailed textual description of the design concept of the present invention, these textual descriptions are merely simple textual descriptions of the design concept of the present invention, and not limitations on the design concept of the present invention. Any combination, addition, or modification that does not exceed the design concept of the present invention falls within the protection scope of the present invention.

Claims

1. A lifting method for an adjustable magnetic permanent magnet conveyor bed, comprising the conveyor bed, characterized in that: A lifting permanent magnet plate is provided below the conveyor bed. The lifting permanent magnet plate includes a permanent magnet plate and a lifting mechanism. The lifting mechanism drives the permanent magnet plate to rise or fall. Since the lifting permanent magnet plate includes a permanent magnet plate and a lifting mechanism, the lifting mechanism can drive the permanent magnet plate to rise or fall. When the workpiece surface on the conveyor bed is large and the workpiece is light, the lifting mechanism drives the permanent magnet plate to rise, so that the workpiece is firmly attracted by the permanent magnet plate without affecting the conveyor belt. When the workpiece surface on the conveyor bed is large and the workpiece is heavy, the controller drives the permanent magnet plate to fall through the lifting mechanism based on the downward pressure generated by the workpiece weight, so that the workpiece is firmly attracted by the permanent magnet plate without affecting the conveyor belt. When the workpiece surface on the conveyor bed is small and the workpiece is light, the lifting mechanism drives... The permanent magnet plate rises, firmly attracting the workpiece without affecting the conveyor belt. When the workpiece on the conveyor bed is small and heavy, the lifting mechanism drives the permanent magnet plate to rise, ensuring the workpiece is firmly attracted without affecting the conveyor belt. The controller uses a PLC controller, which has a built-in weight calculator, area calculator, and permanent magnet force data. Therefore, it can automatically collect the weight and area of ​​the workpiece on the conveyor belt and calculate the rise and fall of the permanent magnet plate, ensuring the workpiece is in the most optimal attracted state—that is, the workpiece is processed while being conveyed by the conveyor belt and remains completely still. The permanent magnet plate comprises a permanent magnet plate bracket (1), a magnet fixing plate (2), multiple magnets (3), multiple support rods (4), a grid-shaped anti-slip plate (5), and a panel (6). The magnet fixing plate (2) is located inside the permanent magnet plate bracket (1). The grid-shaped anti-slip plate (5) is fixed on the magnet fixing plate (2). The multiple magnets (3) are embedded in the grids of the grid-shaped anti-slip plate (5). The plates between the grids and the magnet fixing plate have through holes for the support rods. The upper surfaces of the multiple support rods (4) are in contact with the panel (6), and the lower ends of the multiple support rods (4) are supported by the permanent magnet plate bracket (1). In the design of the permanent magnet plate, the smallest workpiece surface processed by the equipment is used as the reference surface larger than the permanent magnet surface, and then this is used as the benchmark. The base plate used for positioning permanent magnets is designed as a grid structure with spacing. Then, permanent magnets are placed in each grid to form a permanent magnet plate magnetic substrate. This solves the defect that the surface of the workpiece being processed is smaller than any of the permanent magnet surfaces in the magnetic substrate and therefore cannot be positioned. This allows the workpiece with the smallest surface set by the equipment to be processed in a conveying state where it can be firmly attracted by the permanent magnet plate. Multiple lifting nuts (11) are fixed on the magnetic steel fixing plate (2). Multiple lifting screws (10) are screwed to multiple lifting nuts (11) respectively. The sprocket is fixed on the lifting screw (10) and the sprocket on the lifting screw (10) is driven by the drive chain (7) to rise or fall synchronously. The drive chain (7) is driven by the lifting drive reducer (8), and the lifting drive reducer is driven by the handwheel (9).The operator manually adjusts the handwheel (9) or uses a motor-driven lifting reducer (8) according to the size of the workpiece. The reducer (8) drives the drive chain (7) through a sprocket transmission mechanism. The drive chain (7) drives multiple sets of lifting rods (10) to rise or fall synchronously, thereby raising or lowering the permanent magnet plate. When the attraction force of the permanent magnet plate reaches the set value, the lifting sensor will detect the signal and transmit it to the display screen or trigger a voice prompt, so that the permanent magnet plate can firmly attract the workpiece.

2. The lifting method for the adjustable magnetic permanent magnet conveyor bed according to claim 1, characterized in that: Multiple support rods (4) are connected to the panel (6) at one end and fixed to the permanent magnet plate bracket (1) at the other end. The protruding part of the boss is inserted into the hole of the magnet fixing plate (2).

3. The lifting method for the adjustable magnetic permanent magnet conveyor bed according to claim 1, characterized in that: The drive chain (7) is equipped with a tension sprocket.

4. The lifting method for the adjustable magnetic permanent magnet conveyor bed according to claim 1, characterized in that: The lifting sensor (12) is located inside the permanent magnet plate bracket (1), and its signal input terminal is connected to the display screen or PLC controller.

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