Anti-deformation clamp for processing metal sheet

Abstract

The utility model relates to a kind of metal sheet processing anti-deformation clamps, comprising: base plate, first support ring, it is placed in the one side of base plate, for placing metal sheet;Suction pipe, it is set on base plate, and suction pipe one end is communicated with the inside of first support ring, to make the air in the inside of first support ring can be evacuated, to adsorb metal sheet;Multiple support bars, each support bar is evenly distributed and is set on first support ring along circumference, and the axis of each support bar meets at the center of first support ring, and the side of support bar away from base plate is flush with first support ring, to form the support surface of supporting metal sheet;Limiting assembly is equipped on each support bar, for limiting metal sheet movement.By changing traditional fixture single-point clamping mode, by vacuum adsorption and multi-supporting point support structure, metal sheet stress is evenly dispersed, effectively avoid polishing, painting and other processing due to stress concentration caused by deformation, ensure workpiece precision.

Description

Technical Field

[0001] This utility model belongs to the field of hardware processing technology, specifically relating to a metal sheet processing anti-deformation fixture. Background Technology

[0002] In the field of metal sheet processing, processes such as grinding, painting, and engraving place high demands on the clamping and securing of metal sheets. However, existing clamps on the market have significant shortcomings in practical applications.

[0003] Most existing fixtures have clamping points located at only one point in the clamping section. This single-point clamping method makes it difficult to provide uniform and stable support for thin metal sheets. When machining thin metal sheets, the uneven force at a single point makes them prone to deformation during processing, which in turn affects machining accuracy and product quality.

[0004] Meanwhile, single-point clamping results in a relatively concentrated clamping area, which is not only inconvenient for operations such as grinding and painting, but also easily leads to blind spots in the clamping area, affecting the integrity and consistency of the processing. In some processing scenarios with high requirements for the surface quality of metal sheets, existing single-point clamping methods may also leave clamping marks on the surface of the metal sheet, affecting the aesthetics and performance of the product. Therefore, how to design a metal sheet processing fixture that can effectively solve the above problems has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide a metal sheet processing anti-deformation fixture to solve the problems existing in the background art.

[0006] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:

[0007] A metal sheet processing anti-deformation fixture, comprising:

[0008] Baseboard,

[0009] The first support ring is disposed on one side of the base plate and is used to place a metal sheet.

[0010] An air suction pipe is provided on the base plate, and one end of the air suction pipe is connected to the inside of the first support ring so that the air inside the first support ring can be evacuated, thereby adsorbing the metal sheet.

[0011] Multiple support bars are evenly distributed around the circumference of the first support ring, and the axes of the support bars intersect at the center of the first support ring. The side of the support bar away from the base plate is flush with the first support ring to form a support surface for supporting the metal sheet.

[0012] Each of the support bars is provided with a limiting component to restrict the movement of the metal sheet.

[0013] Optionally, the support bar has a slot on the portion outside the first support ring, and the opening of the slot faces the direction away from the base plate.

[0014] The limiting component includes:

[0015] The screw is rotatably mounted inside the slot.

[0016] The slider is located inside the slot and is threaded with the screw.

[0017] A limiting block is disposed on one side of the slider where it is located at the opening of the slot.

[0018] Optionally, the slot may also be open on the side closest to the base plate, so that the slot is a through slot.

[0019] Optionally, the cross-section of the slot is hexagonal, and the slider matches the shape of the slot.

[0020] Optionally, the end of the screw away from the first support ring is provided with a handle.

[0021] Optionally, each of the support bars is also connected to a second support ring and a third support ring inside the first support ring, and the second support ring and the third support ring are flush with each of the support bars.

[0022] Optionally, the first support ring, the second support ring, and the third support ring are all provided with rubber pads on the side away from the base plate.

[0023] The beneficial effects of this utility model are:

[0024] 1. By changing the traditional single-point clamping method of fixtures, the metal sheet is subjected to uniform force distribution through vacuum adsorption and multi-point support structure, which effectively avoids deformation caused by stress concentration during processing such as grinding and painting, and ensures the accuracy of the workpiece.

[0025] 2. By setting the support bar and support ring flush, the surface of the metal sheet to be processed is fully exposed, solving the problem that the clamping area of ​​traditional fixtures cannot be processed, and is especially suitable for processes such as engraving and full surface treatment.

[0026] 3. The limiting component can be adjusted to press against the edge of the sheet, and with the anti-slip buffering effect of the rubber pad, it can not only limit the horizontal sliding during processing, but also avoid rigid contact damage to the surface of the sheet, thus solving the problems of loose clamping and surface marks left by existing fixtures. Attached Figure Description

[0027] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings.

[0028] Figure 1 This is a schematic diagram of the structure of a metal sheet processing anti-deformation fixture according to the present invention. Figure 1 ;

[0029] Figure 2 This is a schematic diagram of the structure of a metal sheet processing anti-deformation fixture according to the present invention. Figure 2 ;

[0030] Figure 3 This is a cross-sectional structural diagram of a metal sheet processing anti-deformation fixture according to the present invention;

[0031] Figure 4 This is a schematic diagram of the limiting component of a metal sheet anti-deformation fixture according to the present invention;

[0032] The symbols for the main components are explained below:

[0033] Base plate 101, first support ring 102, air intake pipe 103, support strip 104, groove 105, second support ring 106, third support ring 107, rubber pad 108, screw 201, slider 202, limit block 203, handle 204. Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] like Figure 1-4 As shown, a metal sheet processing anti-deformation fixture includes:

[0036] Baseboard 101

[0037] The first support ring 102 is disposed on one side of the base plate 101 and is used to place the metal sheet;

[0038] The suction pipe 103 is set on the base plate 101, and one end of the suction pipe 103 is connected to the inside of the first support ring 102 so that the air inside the first support ring 102 can be evacuated, thereby adsorbing the metal sheet.

[0039] Multiple support bars 104 are evenly distributed around the circumference and pass through the first support ring 102. The axes of the support bars 104 intersect at the center of the first support ring 102. The side of the support bar 104 away from the base plate 101 is flush with the first support ring 102 to form a support surface for supporting the metal sheet.

[0040] Each support bar 104 is equipped with a limiting component to restrict the movement of the metal sheet.

[0041] The base plate 101 is the basic load-bearing component of the fixture, providing an installation reference for structures such as the first support ring 102 and the suction pipe 103, ensuring the stability of the overall structure.

[0042] The first support ring 102 serves as a direct placement platform for the metal sheet. Its top surface is flush with the support bar 104, forming a flat support surface. Together with the base plate 101 and the suction pipe 103, it forms a sealed cavity, enabling vacuum adsorption through evacuation. Specifically, the ring adopts a ring-shaped structure, with its inner space connected to the suction pipe 103. When the metal sheet is placed on the top surface, the internal air pressure of the first support ring 102 decreases during evacuation, and atmospheric pressure presses the sheet firmly against the top surface and support bar 104, creating a uniform adsorption force. The ring-shaped design reduces material usage while ensuring the sealing of the adsorption cavity and improving vacuum adsorption efficiency.

[0043] One end of the suction pipe 103 is connected to the internal space of the first support ring 102, and the other end is connected to a vacuum pump (or a negative pressure gas source). After the metal sheet is placed on the top surface of the first support ring 102, the vacuum pump is started, and the suction pipe 103 extracts the air from the first support ring 102, making the air pressure inside the cavity lower than the external atmospheric pressure, forming a gas flow channel, and realizing the air pressure regulation in the adsorption cavity. The adsorption force generated by the air pressure difference acts evenly on the lower surface of the metal sheet. Compared with the traditional single-point clamping, the adsorption force coverage area is increased to more than 80% of the total area of ​​the sheet, effectively dispersing stress and suppressing deformation.

[0044] Support bars 104 are evenly distributed around the circumference of the first support ring 102, flush with the top surface of the first support ring 102, forming a multi-point support surface. This increases the contact area with the metal sheet, disperses the adsorption force and processing force on the metal sheet, and avoids stress concentration leading to deformation. Typically, 4-8 support bars 104 are provided, with their axes intersecting at the center of the first support ring 102, arranged radially. The top of each support bar 104 is on the same plane as the top surface of the first support ring 102, together forming a continuous support surface.

[0045] When the metal sheet is adsorbed, the support bar 104 and the first support ring 102 jointly bear the weight of the sheet and the processing impact force (such as vibration during grinding). Due to the large number and uniform distribution of support points, the force per unit area is significantly reduced (for example, the traditional single-point clamping pressure is about 5MPa, while this design can reduce it to below 0.5MPa), reducing the deformation of the sheet by more than 70%. The support bar 104 passes through the first support ring 102, and its radial support enhances the overall structural rigidity of the clamp, avoiding ring deformation caused by negative pressure during adsorption.

[0046] Specifically, during the operation, the metal sheet is first placed on the top surface of the first support ring 102 and the support bar 104, ensuring that the sheet covers the adsorption area. Then, air is drawn out through the suction pipe 103, creating a vacuum or semi-vacuum environment inside the first support ring 102. Under atmospheric pressure, the metal sheet is adsorbed onto the support surface, with the adsorption force evenly distributed on the lower surface of the sheet. Finally, the multi-point support of the support bar 104 and the vacuum adsorption work together to keep the sheet flat during processing, avoiding deformation caused by single-point force. At the same time, the flush design of the support surface ensures that the upper surface of the sheet is completely exposed, with no blind spots in the processing.

[0047] Furthermore, the portion of the support bar 104 located outside the first support ring 102 has a slot 105, and the opening of the slot 105 faces the direction of the support bar 104 away from the base plate 101.

[0048] The limiting component includes: a screw 201, which is rotatably disposed inside the slot 105; a slider 202, which is located inside the slot 105 and is threadedly matched with the screw 201; and a limiting block 203, which is disposed on the side of the slider 202 located at the opening of the slot 105.

[0049] The slot 105 is formed on the portion of the support bar 104 located outside the first support ring 102, with the opening facing away from the base plate 101 (i.e., towards the metal sheet placement surface). The slot 105 provides installation space and movement track for the limiting components (screw 201, slider 202, limiting block 203); the through-slot design facilitates the installation and removal of the screw 201, while ensuring that the slider 202 can move along the full length of the slot 105, thus expanding the limiting adjustment range.

[0050] The screw 201 is rotatably mounted inside the slot 105, with its axis aligned radially with the support bar 104. The external thread of the screw 201 matches the internal thread of the slider 202. When the screw 201 rotates, the thread drive causes the slider 202 to move axially along the slot 105, thereby causing the slider 202 to perform linear motion. As the screw 201 rotates, the slider 202 moves along the slot 105 due to the thread drive, enabling fine adjustments at the 0.1-1mm level.

[0051] The limiting block 203 is fixed to the side of the slider 202 near the opening of the slot 105 and moves with the slider 202. During adjustment, the screw 201 is rotated to move the limiting block 203 until it is pressed against the edge of the metal sheet. During processing, the limiting block 203 prevents the sheet from sliding due to external forces (such as the pushing force of a grinding tool) by limiting its position, and further improves the clamping stability in conjunction with the vacuum adsorption force.

[0052] Furthermore, the slot 105 is also open on the side near the base plate 101, so that the slot 105 is a through slot.

[0053] When the slider 202 moves in the groove, the through-groove structure prevents debris, oil and other impurities from accumulating at the bottom of the groove, ensuring that the slider 202 moves smoothly in a straight line along the axis of the screw 201 without the risk of jamming.

[0054] Furthermore, the cross-section of the slot 105 is hexagonal, and the slider 202 matches the shape of the slot 105.

[0055] The inner wall of the hexagonal slot and the outer wall of the hexagonal slider 202 form a surface contact constraint. When the screw 201 rotates, the slider 202 cannot rotate around the screw axis due to the limiting effect of the hexagonal contour, and can only move in a straight line along the axial direction of the slot.

[0056] Furthermore, a handle 204 is provided at the end of the screw 201 away from the first support ring 102. It adopts a circular structure and the surface can be provided with anti-slip texture (such as knurling or rubber coating) to facilitate manual operation.

[0057] Furthermore, each support bar 104 is also connected to a second support ring 106 and a third support ring 107 inside the first support ring 102, and the second support ring 106 and the third support ring 107 are flush with each support bar 104.

[0058] The second support ring 106 and the third support ring 107 are concentrically arranged inside the first support ring 102 and connected to the first support ring 102 via support bars 104. Each support bar 104 is evenly distributed along the circumference, and its inner ends are fixed to the outer walls of the second support ring 106 and the third support ring 107, forming a composite support structure of "ring + spokes". Furthermore, the top surfaces of the second support ring 106 and the third support ring 107 are on the same plane as the top surfaces of the support bars 104 and the first support ring 102, collectively forming the support surface of the metal sheet. The weight of the metal sheet and the processing forces are transmitted to the multiple support rings through the support bars 104, distributing the load throughout the entire frame structure, rather than at a single support point.

[0059] Furthermore, rubber pads 108 are provided on the side of the first support ring 102, the second support ring 106, and the third support ring 107 away from the base plate 101.

[0060] The rubber pad 108 absorbs the rigid contact force between the metal sheet and the support ring through its own elastic deformation, transforming the clamping stress from a concentrated load to a distributed load. For example, when the sheet is adsorbed, the rubber pad can compress by 0.5-1 mm, reducing the contact pressure from 5 MPa in rigid contact to below 1 MPa, thus preventing indentations on the sheet surface. Simultaneously, the rubber pad 108 increases the static friction coefficient between the sheet and the support surface by more than three times, allowing it to withstand an additional 5-10 N of horizontal thrust without slipping, in addition to the vacuum adsorption force, meeting the stability requirements of high-power processing equipment.

[0061] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0062] It should also be noted that, in this document, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used 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, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, relational terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations, nor should they be construed as indicating or implying relative importance. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. In the absence of further restrictions, an element defined by the phrase "includes a..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes the element.

[0063] The technical solutions provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand this application, and the content of this specification should not be construed as a limitation of this application. Furthermore, for those skilled in the art, there will be different forms of changes in the specific implementation methods and application scope based on this application. It is neither necessary nor possible to exhaustively list all implementation methods here, and obvious changes or modifications derived therefrom are still within the protection scope of this application.

Claims

1. A deformation-resistant fixture for processing thin metal sheets, characterized in that... ,include: Baseboard, The first support ring is disposed on one side of the base plate and is used to place a metal sheet. An air suction pipe is provided on the base plate, and one end of the air suction pipe is connected to the inside of the first support ring so that the air inside the first support ring can be evacuated, thereby adsorbing the metal sheet. Multiple support bars are evenly distributed around the circumference of the first support ring, and the axes of the support bars intersect at the center of the first support ring. The side of the support bar away from the base plate is flush with the first support ring to form a support surface for supporting the metal sheet. Each of the support bars is provided with a limiting component to restrict the movement of the metal sheet.

2. The anti-deformation fixture for metal sheet processing according to claim 1, characterized in that, The support bar has a slot on the portion outside the first support ring, and the opening of the slot faces the direction away from the base plate. The limiting component includes: The screw is rotatably mounted inside the slot. The slider is located inside the slot and is threaded with the screw. A limiting block is disposed on one side of the slider where it is located at the opening of the slot.

3. The anti-deformation fixture for metal sheet processing according to claim 2, characterized in that, The groove is also open on the side closest to the base plate, so that the groove is a through groove.

4. The anti-deformation fixture for metal sheet processing according to claim 2, characterized in that, The cross-section of the slot is hexagonal, and the slider matches the shape of the slot.

5. The anti-deformation fixture for metal sheet processing according to claim 2, characterized in that, The screw has a handle at the end away from the first support ring.

6. The anti-deformation fixture for metal sheet processing according to claim 1, characterized in that, Each of the support bars is also connected to a second support ring and a third support ring inside the first support ring, and the second support ring and the third support ring are flush with each of the support bars.

7. The anti-deformation fixture for metal sheet processing according to claim 6, characterized in that, The first support ring, the second support ring, and the third support ring are all provided with rubber pads on the side away from the base plate.

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