Magnetic clamp

Abstract

The utility model provides a magnetic clamp, contain a magnetic surface panel, a plurality of elastic members and a plurality of fixing pieces. The elastic member contains an upper magnet and a lower magnet, utilizes magnet same pole repulsion to make the elastic member produce elastic force further, so that the magnetic clamp provided by the utility model can be suitable for workpieces of various sizes and various surfaces.

Description

Technical Field

[0001] This utility model relates to a machining fixture, specifically a magnetic fixture. Background Technology

[0002] In the metal industry, when machining a workpiece, it is necessary to fix its position. Currently, a magnetic platform is used to attach the workpiece to the platform to fix its position. Unlike traditional fixtures, this magnetic platform can hold workpieces of different sizes. However, because one surface of the workpiece may be irregularly shaped or curved, it may not be possible for the workpiece to fit snugly against the magnetic platform. As a result, we cannot ensure the magnetic force between the workpiece and the platform, which may lead to displacement and deformation of the workpiece during machining. Utility Model Content

[0003] To overcome the limitations of traditional clamps, this invention provides a magnetic clamp suitable for workpieces of various surfaces and sizes. The magnetic clamp includes a magnetically conductive panel, multiple elastic elements, and multiple fixing elements. When a workpiece is placed in the magnetic clamp, if the workpiece surface is uneven, the elastic elements will cause the workpiece surface to conform to the magnetic clamp, thus preventing displacement and deformation of the workpiece during processing.

[0004] The elastic element comprises an upper part and a lower part, with an elastic element assembly between the upper and lower parts. The elastic element assembly consists of an upper magnet and a lower magnet, with the upper magnet screwed onto the upper part and the lower magnet screwed onto the lower part. Since the adjacent magnetic poles of the upper and lower magnets are the same, a repulsive force is generated. When an external force is applied to the elastic element, the upper and lower parts move relative to each other, causing the elastic element to generate an elastic force.

[0005] As a further improvement of this utility model, the elastic member also includes an upper component coupled to the upper magnet and a lower component coupled to the lower magnet, wherein the upper component moves closer to or further away from the lower component according to the external force.

[0006] As a further improvement of this utility model, the elastic element also includes an upper screw and a lower screw. The upper magnet and the lower magnet are annular bodies. The upper screw passes through the upper magnet and is engaged with the upper component. The lower screw passes through the lower magnet and is engaged with the lower component.

[0007] As a further improvement of this utility model, one end of the upper component includes a first opening, the upper component includes an upper connecting portion, the upper connecting portion extends protruding from a closed end of the upper component toward the first opening, and the upper screw is screwed into the upper connecting portion to fix the upper magnet inside the upper component.

[0008] As a further improvement of this utility model, one end of the upper component also includes a second opening, and the lower component is inserted into the upper component through the second opening corresponding to the first opening. After the lower component is combined with the upper component, the upper connecting part extends into the lower component through the second opening.

[0009] As a further improvement of this utility model, the upper component also includes two first row holes penetrating through one of the opposite sides of the circumferential surface of the upper component, and the lower component also includes two second row holes recessed into one of the opposite sides of the circumferential surface of the lower component. After the lower component and the upper component are combined, the two second row holes are respectively aligned and connected with the two first row holes of the upper component.

[0010] As a further improvement of this utility model, the two second row holes are elongated holes extending toward the second opening, and the length of the two second row holes is greater than that of the two first row holes.

[0011] As a further improvement of this utility model, the lower component also includes a screw-locking part, which protrudes along the axis from a second end face of the lower component, and the screw-locking part can be screwed onto the magnetic panel.

[0012] The advantage of this invention is that when the workpiece surface is irregular, the surface of the magnetic clamp can be adjusted by the elastic element, allowing the workpiece to fit snugly against the magnetic clamp and preventing it from falling off or shifting, which could cause deformation after processing. Because the elastic element group in the elastic element is composed of magnets, unlike conventional spring blocks, this elastic element does not suffer from elastic fatigue. Furthermore, when the magnetic pole on the side of the upper magnet connected to the upper component is the same as the grid magnetic pole, the magnetic force of the elastic element can be increased. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a preferred embodiment of the magnetic clamp assembly of this utility model;

[0014] Figure 2 This is an exploded view of the elastic element in a preferred embodiment of the present invention;

[0015] Figure 3 This is a cross-sectional view of the elastic element in the first state according to a preferred embodiment of the present invention;

[0016] Figure 4 This is a cross-sectional view of the elastic element in the second state according to a preferred embodiment of the present invention;

[0017] Figure 5 This is a schematic diagram illustrating the use of the magnetic clamp according to a preferred embodiment of the present invention.

[0018] Symbol explanation:

[0019] 10. Magnetic Conductor Panel

[0020] 11-square grid

[0021] 111 squares

[0022] 20 Elastic components

[0023] 21. Elastic element group

[0024] 211 Magnet

[0025] 212 Lower magnet

[0026] 213 Screw on

[0027] 214 Unscrew

[0028] 22 Upper Components

[0029] 221 First Opening

[0030] 222 Upper joint

[0031] 223 First end face

[0032] 224 First row of holes

[0033] 225 connecting hole

[0034] 23 Lower Components

[0035] 231 Second opening

[0036] 232 Second row of holes

[0037] 233 Screw Lock Part

[0038] 234 Second end face

[0039] 30 Fasteners

[0040] Workpiece A

[0041] B gap Detailed Implementation

[0042] refer to Figure 1This invention provides a magnetic clamp comprising a magnetically conductive panel 10, multiple elastic elements 20, and multiple fixing elements 30. The magnetically conductive panel 10 is a cuboid containing a grid array 11 and multiple coils. The grid array 11 is located on the surface of the magnetically conductive panel 10. The grid array 11 is formed by arranging multiple squares 111. A coil is disposed corresponding to each square 111 within the magnetically conductive panel 10. A magnetic field is generated in each square 111 by conducting current through each coil. By conducting current in different directions through each coil, the magnetic poles of each square 111 are changed. The grid array 11 is arranged in groups of four, with at least one square 111 in each group housing an elastic element 20.

[0043] refer to Figures 2 to 4 The elastic element 20 is cylindrical in shape and includes an elastic element assembly 21, an upper component 22, and a lower component 23. The elastic element assembly 21 includes an upper magnet 211, a lower magnet 212, an upper screw 213, and a lower screw 214. Both the upper magnet 211 and the lower magnet 212 are permanent magnets with N and S poles, and are hollow ring-shaped. A gap B is provided between the upper magnet 211 and the lower magnet 212, and adjacent sides have the same magnetic pole. The upper screw 213 passes through the upper magnet 211, and the lower screw 214 passes through the lower magnet 212.

[0044] The upper component 22 is a hollow cylinder with a first opening 221 at one end. The upper component 22 includes an upper connecting portion 222, two first row holes 224, and two connecting holes 225. The upper connecting portion 222 is used to connect the elastic element assembly 21. The upper connecting portion 222 is rod-shaped and protrudes from a closed end of the upper component 22 toward the first opening 221. The upper screw 213 is screwed into the upper connecting portion 222 to fix the upper magnet 211 inside the upper component 22. The two first row holes 224 respectively penetrate one opposite side of the circumferential surface of the upper component 22. The two connecting holes 225 are recessed in a first end face 223 of the upper component 22 for connecting with a workpiece A.

[0045] The lower component 23 is a hollow cylinder with a second opening 231 at one end. The lower component 23 passes through the upper component 22 through the second opening 231, corresponding to the first opening 221. After the lower component 23 and the upper component 22 are joined, the upper connecting portion 222 extends into the lower component 23 through the second opening 231. The lower screw 214 is screwed into the closed end of the lower component 23 to fix the lower magnet 212 inside the lower component 23. When the upper connecting portion 222 extends into the lower component 23 through the second opening 231, the upper magnet 211 and the lower magnet 212 are aligned and spaced apart. Because the adjacent magnetic poles of the upper magnet 211 and the lower magnet 212 are the same, a repulsive force is generated, causing the upper component 22 to move away from the lower component 23. At this time, when an external force is applied from the upper component 22 toward the lower component 23, the external force will resist the repulsive force, and the upper component 22 will move relative to the lower component 23 in a axial direction to change the size of the gap B, further causing the elastic member 20 to generate an elastic force. In this way, the upper component 22 and the lower component 23 can move closer or further apart with the repulsive force and the applied external force.

[0046] The lower component 23 includes two second rows of holes 232 and a screw locking part 233. The two second rows of holes 232 are respectively recessed on one opposite side of the circumferential surface of the lower component 23. When the lower component 23 is combined with the upper component 22, the two second rows of holes 232 are aligned and connected with the two first rows of holes 224 of the upper component 22. Among them, the two second row holes 232 are elongated holes extending towards the second opening 231, and their length is greater than that of the two first row holes 224. When the upper component 22 is displaced relative to the lower component 23, the two first row holes 224 are respectively displaced at both ends of the two second row holes 232. Thus, when the elastic member 20 is in use, as the lower component 23 moves closer to or further away from the upper component 22, a gas can enter through the two first row holes 224 and the two second row holes 232 or be discharged in the gap B, so as to avoid the vacuum pressure generated in the gap B from affecting the use of the elastic member 20. Moreover, the length of the two second row holes 232 is greater than that of the two first row holes 224 to ensure that the two second row holes 232 and the two first row holes 224 can be interconnected when the upper component 22 and the lower component 23 are in relative motion. The screw-locking part 233 protrudes along the axis from a second end face 234 of the lower component 23, and the screw-locking part 233 can be screwed onto the magnetic panel 10.

[0047] The fixing member 30 is a cylinder, placed in one of the squares 111 of the square array 11 of the magnetic panel 10, forming the magnetic clamp. When the workpiece A is placed in the magnetic clamp, the magnetic force provided by the magnetic panel 10 to one of the squares 111 will cause an attraction between the workpiece A and the magnetic clamp.

[0048] Please refer to Figure 5 The magnetic clamp provided by this utility model, through magnetism and the setting of the elastic element 20, can be used to firmly and securely stabilize the surface of the workpiece A. For example, when the surface of the workpiece A includes a recess, when the workpiece A is to be placed on the magnetically conductive panel 10, the elastic element 20 can be placed opposite the recess. At this time, the elastic element 20, based on the repulsive force, causes the upper part 22 to move away from the lower part 23 until the upper part 22 abuts against the recess on the surface of the workpiece A. At the same time, the attractive force generated between the workpiece A and the magnetic clamp is used to stably attract the workpiece A, further enabling the workpiece A to fit with the magnetic clamp, preventing it from falling off or shifting and causing deformation of the workpiece A after processing. Since the elastic element group 21 in the elastic element 20 is composed of magnets, unlike conventional spring blocks, the elastic element 20 does not have the problem of elastic fatigue. Thus, the magnetic clamp provided by this utility model can achieve an adaptive adjustment to the surface contour of the workpiece A, preventing the gap between the irregular surface of the workpiece A and the clamp from affecting the magnetic attraction force.

[0049] Furthermore, when the magnetic pole of the square 111 where the elastic member 20 is placed is the same as the magnetic pole of the side of the upper magnet 211 connected to the upper component 22, the magnetic force of the elastic member 20 can be increased. For example, when the magnetic pole of the square 111 where the elastic member 20 is placed is N, and the magnetic pole of the side of the upper magnet 211 connected to the upper component 22 is also N, it helps to increase the magnitude of the magnetic pole of the elastic member 20.

[0050] The advantage of this invention is that when the surface of workpiece A is irregular, the surface of the magnetic clamp can be adjusted by the elastic element 20, allowing workpiece A to fit snugly against the magnetic clamp and preventing it from falling off or shifting, which could cause deformation of workpiece A after processing. Since the elastic element group 21 in the elastic element 20 is composed of magnets, unlike conventional spring blocks, the elastic element 20 does not suffer from elastic fatigue. Furthermore, when the magnetic pole of the upper magnet 211 connected to the upper component 22 is the same as the magnetic pole of the square 111, the magnetic force of the elastic element 20 can be increased.

Claims

1. A magnetic clamp, characterized by It includes: A magnetically conductive panel includes a grid array and multiple coils. The grid array is located on the surface of the magnetically conductive panel and is formed by arranging multiple adjacent squares. A coil is provided in the magnetically conductive panel for each square. The magnetically conductive panel can generate a magnetic field in each square by conducting a current through each of the internal coils. At least one elastic element is disposed in one of the squares, comprising an upper magnet and a lower magnet spaced apart, the upper magnet and the lower magnet having the same magnetic pole on their adjacent sides to create a gap, wherein the lower magnet is disposed adjacent to one of the squares, wherein the size of the gap changes according to an external force applied by the upper magnet toward the lower magnet.

2. The magnetic clamp of claim 1, wherein, The elastic element also includes an upper component coupled to the upper magnet and a lower component coupled to the lower magnet, the upper component moving toward or away from the lower component according to the external force.

3. The magnetic clamp of claim 2, wherein, The elastic element also includes an upper screw and a lower screw. The upper and lower magnets are ring-shaped. The upper screw passes through the upper magnet and is engaged with the upper component. The lower screw passes through the lower magnet and is engaged with the lower component.

4. The magnetic clamp of claim 3, wherein, One end of the upper component includes a first opening, and the upper component includes an upper connecting portion. The upper connecting portion extends protruding from a closed end of the upper component toward the first opening, and the upper screw is screwed into the upper connecting portion to fix the upper magnet inside the upper component.

5. The magnetic clamp of claim 4, wherein, One end of the lower component also includes a second opening. The lower component is inserted into the upper component through the second opening, corresponding to the first opening. After the lower component and the upper component are joined, the upper joining part extends into the lower component through the second opening.

6. The magnetic clamp of claim 5, wherein, The upper component also includes two first row holes that penetrate one of the opposite sides of the circumferential surface of the upper component, and the lower component also includes two second row holes that are recessed on one of the opposite sides of the circumferential surface of the lower component. After the lower component and the upper component are combined, the two second row holes are respectively aligned and connected with the two first row holes of the upper component.

7. The magnetic clamp of claim 6, wherein, The two second row holes are elongated holes extending toward the second opening, and the length of the two second row holes is greater than that of the two first row holes.

8. The magnetic clamp of claim 2, wherein, The lower component also includes a screw-locking part that protrudes along the axis from a second end face of the lower component and can be screwed onto the magnetic panel.

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