Magnetic adsorption clamp

Abstract

The utility model discloses a magnetic adsorption clamp, which belongs to the field of clamps and comprises a magnetic adsorption table, and a deviation mechanism is arranged on one side of the magnetic adsorption table. Compared with the prior art, the device has the advantages that the effect of one-way movement of the cross-shaped shaft sleeve is achieved through threaded transmission of the longitudinal screw rod and the cross-shaped shaft sleeve, and the cross-shaped shaft sleeve does not vibrate during translation; the inner wall end of the cross-shaped shaft sleeve is provided with the plane sliding block tightly attached to the inner wall of the cross-shaped shaft sleeve, and the stability of the dial indicator supporting plate above the cross-shaped shaft sleeve is ensured through sliding of the plane sliding block and the inner wall of the cross-shaped shaft sleeve, so that the dial indicator can conveniently and completely measure the flatness of the outer wall of the metal piece.

Description

Technical Field

[0001] The utility model relates to the field of clamps, in particular to a magnetic adsorption clamp. Background Art

[0002] In existing CNC machining, some semi-finished metal parts do not have corresponding holes or fixture fixing points on them, which makes it difficult to fix them during machining. To solve this problem, people often use negative pressure adsorption devices and magnetic adsorption fixtures to fix the metal parts to be processed. However, the negative pressure adsorption device will become loose when facing large or heavy metal parts, while the magnetic adsorption fixture does not have such worries. It is fixed to the processing table through several magnetic adsorption tables, and uses magnetism to adsorb the metal parts, and is not affected by the size and weight of the metal parts.

[0003] The existing magnetic adsorption fixture uses bolts and other fixing frames to fix the magnetic adsorption table to the workbench, and uses tools such as micrometers to determine the relative levelness of the magnetic adsorption table to ensure the accuracy of metal parts during processing and avoid problems with the flatness of the base that lead to uneven thickness of metal parts during processing.

[0004] In the processing flow of metal parts, in order to ensure the positional accuracy of the metal parts, a micrometer is usually used to measure the side levelness of the metal parts after the metal parts are fixed. However, when the outer wall of the semi-finished metal parts exceeds the processing stroke of the machine tool spindle, but the area to be processed is within the processing stroke of the machine tool spindle (the common micrometer flatness and levelness measurement usually involves fixing the micrometer on the spindle of the machine tool), it is necessary to use an external tool to determine the levelness of the side wall of the metal parts. The fixing point of the micrometer is usually fixed to a magnetic adsorption table. However, because the side of the magnetic adsorption table does not have a one-way horizontal movement mechanism, the measuring distance of the micrometer is extremely limited, making it difficult to measure the complete side flatness of the metal parts. Utility Model Content

[0005] The technical problem to be solved by the utility model is that the side surface of the existing magnetic adsorption fixture does not have a one-way offset device adapted to the dial indicator.

[0006] In order to solve the above technical problems, the technical solution provided by the utility model is: a magnetic adsorption clamp, including a magnetic adsorption platform, an offset mechanism is provided on one side of the magnetic adsorption platform, the offset mechanism includes a longitudinal screw located on one side of the magnetic adsorption platform and a cross-shaped sleeve sleeved on the threaded end of the longitudinal screw, the longitudinal screw passes through the side wall of the magnetic adsorption platform, a flat slider parallel to the cross-shaped sleeve is provided on one side of the magnetic adsorption platform, and a micrometer support plate is provided above the cross-shaped sleeve.

[0007] As an improvement, the cross-shaped sleeve is connected to the planar slider through body contact.

[0008] As an improvement, the cross-shaped sleeve includes a T-shaped upper screw sleeve and a T-shaped lower screw sleeve located at the upper and lower ends of the longitudinal screw.

[0009] As an improvement, the micrometer support plate and the T-shaped upper screw sleeve, as well as the T-shaped upper screw sleeve and the T-shaped lower screw sleeve are all connected by a bolt structure.

[0010] As an improvement, a hexagonal through hole is provided on one side of the longitudinal screw.

[0011] As an improvement, the longitudinal screw is connected to the inner hole of the cross-shaped sleeve through a thread, and the longitudinal screw is connected to the side through-hole of the magnetic adsorption platform through a bearing.

[0012] The advantages of the present invention over the prior art are that the device achieves the effect of unidirectional movement of the cross-shaped shaft sleeve through threaded transmission of the longitudinal screw and the cross-shaped shaft sleeve. In order to ensure that the cross-shaped shaft sleeve does not vibrate during translation, a flat slider is provided at the inner wall end of the cross-shaped shaft sleeve, which is in close contact with the inner wall of the cross-shaped shaft sleeve. The stability of the micrometer support plate above the cross-shaped shaft sleeve is ensured by the sliding of the flat slider and the inner wall of the cross-shaped shaft sleeve, thereby facilitating the micrometer to completely measure the flatness of the outer wall of the metal part. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a general structural diagram of a magnetic adsorption fixture of the present utility model.

[0014] Figure 2 This is a structural diagram of the offset mechanism of a magnetic adsorption fixture of the utility model.

[0015] Figure 3 This is an exploded view of the offset mechanism of a magnetic adsorption fixture of the utility model.

[0016] Figure 4 This is a cross-sectional view of the offset mechanism of a magnetic adsorption fixture of the utility model.

[0017] As shown in the figure: 1. Magnetic adsorption table; 2. Offset mechanism; 21. Longitudinal screw; 211. Hexagonal through hole; 22. Cross-shaped shaft sleeve; 221. T-shaped upper screw sleeve; 222. T-shaped lower screw sleeve; 23. Flat slider; 24. Micrometer support plate. DETAILED DESCRIPTION

[0018] The present invention will be described in further detail below with reference to the accompanying drawings.

[0019] As the instruction manual Figure 1 、 2As shown, it includes a magnetic adsorption platform 1, and one side of the magnetic adsorption platform 1 is provided with an offset mechanism 2, and the offset mechanism 2 includes a longitudinal screw 21 located on one side of the magnetic adsorption platform 1 and a cross-shaped sleeve 22 sleeved on the threaded end of the longitudinal screw 21, the longitudinal screw 21 is connected to the inner hole of the cross-shaped sleeve 22 through a thread, the longitudinal screw 21 passes through the side wall of the magnetic adsorption platform 1, and one side of the magnetic adsorption platform 1 is provided with a plane slider 23 parallel to the cross-shaped sleeve 22, and a micrometer support plate 24 is provided above the cross-shaped sleeve 22, and one side of the longitudinal screw 21 is provided with an inner hexagonal through hole 211, the cross-shaped sleeve 22 is connected to the plane slider 23 through body contact, and the longitudinal screw 21 is connected to the side through hole of the magnetic adsorption platform 1 through a bearing, Bearings are put on both ends of the screw 21 to ensure that the longitudinal screw 21 will not wear the side through holes of the magnetic adsorption platform 1 during rotation, thereby ensuring the stability of the longitudinal screw 21; the hexagonal through hole 211 on one side of the longitudinal screw 21 is adapted to the existing hexagonal wrench, thereby facilitating the selection of the longitudinal screw 21 rotation tool; in order to ensure that the cross-shaped shaft sleeve 22 does not rotate during translation, a flat slider 23 is provided on the inner wall side of the thick column end of the cross-shaped shaft sleeve 22, and the sliding connection between the two ensures that the cross-shaped shaft sleeve 22 will not rotate axially during translation. In order to adapt to micrometers of different sizes, the micrometer support plate 24 above the cross-shaped shaft sleeve 22 is fixed with screws, so that the micrometer support plate 24 is detachable, which is convenient for replacing the micrometer support plate 24.

[0020] As the instruction manual Figure 2 、 3 As shown in , 4, the cross-shaped sleeve 22 includes a T-shaped upper screw sleeve 221 and a T-shaped lower screw sleeve 222 located at the upper and lower ends of the longitudinal screw rod 21, and the micrometer support plate 24 and the T-shaped upper screw sleeve 221 as well as the T-shaped upper screw sleeve 221 and the T-shaped lower screw sleeve 222 are all connected by a bolt structure. In order to facilitate the disassembly of the cross-shaped sleeve 22, the cross-shaped sleeve 22 is split into a T-shaped upper screw sleeve 221 and a T-shaped lower screw sleeve 222, and the two are connected by screws. This makes it possible to remove the cross-shaped sleeve 22 by simply loosening the screws connecting the T-shaped upper screw sleeve 221 and the T-shaped lower screw sleeve 222, without having to dismantle the entire offset mechanism 2 in order to replace the cross-shaped sleeve 22.

[0021] During the specific implementation of the present invention, a metal part is placed on the magnetic adsorption platform 1, the metal part is aligned with the side wall of the magnetic adsorption platform 1, and the adsorption switch of the magnetic adsorption platform 1 is turned on; a dial indicator is placed on the dial indicator support plate 24, and the probe of the dial indicator is pressed against the side wall of the metal part. An inner hexagonal wrench is inserted into the hexagonal through hole 211, and the inner hexagonal wrench is rotated to control the cross-shaped shaft sleeve 22 to slide unidirectionally along the flat slider 23, thereby measuring the flatness of the metal part and determining the accuracy of the position of the metal part.

[0022] The above description of the present invention and its embodiments is non-limiting. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by the above, and does not deviate from the purpose of the present invention, without inventive design, a structure and embodiment similar to the technical solution should fall within the scope of protection of the present invention.

Claims

1. A magnetic adsorption fixture, comprising a magnetic adsorption platform (1), characterized in that: A shift mechanism (2) is provided on one side of the magnetic adsorption platform (1), and the shift mechanism (2) comprises a longitudinal screw (21) located on one side of the magnetic adsorption platform (1) and a cross-shaped shaft sleeve (22) sleeved on the threaded end of the longitudinal screw (21), wherein the longitudinal screw (21) passes through the side wall of the magnetic adsorption platform (1), and a plane slider (23) parallel to the cross-shaped shaft sleeve (22) is provided on one side of the magnetic adsorption platform (1), and a micrometer support plate (24) is provided above the cross-shaped shaft sleeve (22).

2. The magnetic adsorption fixture according to claim 1, characterized in that: The cross-shaped shaft sleeve (22) is connected to the plane slider (23) through body contact.

3. The magnetic adsorption fixture according to claim 1, characterized in that: The cross-shaped sleeve (22) comprises a T-shaped upper screw sleeve (221) and a T-shaped lower screw sleeve (222) located at the upper and lower ends of the longitudinal screw rod (21).

4. The magnetic adsorption fixture according to claim 2, characterized in that: The dial gauge support plate (24) and the T-shaped upper screw sleeve (221), as well as the T-shaped upper screw sleeve (221) and the T-shaped lower screw sleeve (222) are all connected via a bolt structure.

5. The magnetic adsorption fixture according to claim 1, characterized in that: A hexagonal through hole (211) is provided on one side of the longitudinal screw (21).

6. The magnetic adsorption fixture according to claim 1, characterized in that: The longitudinal screw (21) is connected to the inner hole of the cross-shaped sleeve (22) through a thread, and the longitudinal screw (21) is connected to the side through-hole of the magnetic adsorption platform (1) through a bearing.

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