Soft metal light film sheet clamping device and soft metal light film sheet clamping method

Abstract

The application provides a soft metal light film piece clamping device and a soft metal light film piece clamping method. The soft metal light film piece clamping device comprises a positioning block, a metal piece, a magnet, an elastic piece and a fixing piece. The positioning block is provided with a mounting groove, and the hollow area comprises a first accommodating cavity and a second accommodating cavity. The magnet is located in the mounting groove, and the magnet and the metal piece are magnetically attracted to each other to fix the soft metal light film piece in the mounting groove. The application sets a non-metal film on the contact part of the metal hook and the surface of the magnet to maximize the protection of the surface quality of the soft metal light film piece. The application uses the magnet, the metal hook and the annular rubber rope to jointly act on the soft metal light film piece to realize the clamping of the soft metal light film piece. Since this clamping method is adopted, the thickness, height and weight of the magnet are small, so the interference caused by subsequent laser processing, protective gas blowing and other processes is small, and the problem of large stress of the soft metal light film piece surface caused by the pressing block and the pressing plate is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of clamping, in particular to a soft metal light film sheet clamping device and a soft metal light film sheet clamping method, and more particularly to a soft metal large-area light film sheet precision clamping device, and most particularly to a soft metal light film sheet femtosecond laser milling flexible clamping device. BACKGROUND

[0002] The soft metal light film sheet to which the present application is directed is applied to the field of launch vehicles and is an important functional control element in the rocket pressurization delivery system. Once it fails, it will lead to serious consequences such as failure of the rocket flight.

[0003] The clamping of the soft metal light film sheet has always been a problem in the field of forming processing. Since the soft metal light film sheet is thin with a thickness of 0.1mm-1mm, it is easily deformed, and the flatness is affected, so the processing size is affected, thereby affecting the product performance. At the same time, the soft metal light film sheet has very high requirements for surface quality, and once there are scratches, pits and other abnormalities, it will also affect the product performance. It cannot meet the processing quality requirements of the soft metal light film sheet for launch vehicles.

[0004] At present, the soft metal light film sheet is processed by stamping forming method, and after processing, there are many defects such as surface scratches, pits, poor flatness, low pass rate and great quality risks. Non-contact femtosecond laser processing can effectively reduce the above problems. However, improper clamping (such as using a press plate, a press block, etc.) during femtosecond laser milling processing will cause defects such as surface scratches, pits, poor flatness of the soft metal light film sheet, and also cause processing problems such as laser head interference, affecting the processing efficiency, pass rate and quality stability of the product.

[0005] The traditional clamping and fixing method is to fix the press plate and the press block on the machine tool processing platform, which directly contacts the surface of the soft metal light film sheet with a large pressure. These clamping and fixing devices and methods have the following problems:

[0006] (1) The press plate and the press block are directly pressed on the upper and lower surfaces of the soft metal light film sheet, which is easy to produce indentation on the surface of the soft metal light film sheet. Once there are foreign matters mixed in the middle, it will cause abnormalities such as pits, which greatly affect the surface quality of the soft metal light film sheet.

[0007] (2) The area and thickness of the press plate and the press block on the soft metal light film sheet are large, which covers a large area on the soft metal light film sheet, causing the press plate and the press block to interfere with laser processing and protection gas blowing, resulting in that some angles cannot be processed, and re-clamping greatly affects the processing precision.

[0008] (3) The clamping method of the pressing plate and the pressing block. After being fixed, the pressing plate and the pressing block have large area and thickness, and thus have large weight. When the pressing plate and the pressing block press the soft metal light film sheet, the soft metal light film sheet will generate certain surface stress, and thus is prone to deformation such as bending after stress release, which greatly affects the processing quality and flatness requirement of the soft metal light film sheet. SUMMARY

[0009] In view of the defects in the prior art, the purpose of the present application is to provide a soft metal light film sheet clamping device and a soft metal light film sheet clamping method.

[0010] According to the present application, a soft metal light film sheet clamping device is provided, which comprises a positioning block, a metal piece, a magnet, an elastic piece and a fixing piece.

[0011] The positioning block is provided with a mounting groove, which is arranged at one end of the positioning block, and the fixing piece is arranged at the other end of the positioning block. The mounting groove is used to accommodate the soft metal light film sheet. The soft metal light film sheet has a thickness of 0.5-1 mm and a flatness of less than 0.02.

[0012] The positioning block is provided with a hollow area, which comprises a first accommodating cavity and a second accommodating cavity. The metal piece is arranged in the first accommodating cavity, and the elastic piece is arranged in the second accommodating cavity. One end of the elastic piece is detachably connected with the metal piece, and the other end of the elastic piece is detachably connected with the fixing piece. The first accommodating cavity is in communication with the mounting groove.

[0013] The magnet is arranged in the mounting groove and at the top end of the soft metal light film sheet. The magnet and the metal piece are magnetically attracted to each other, so as to fix the soft metal light film sheet in the mounting groove.

[0014] Preferably, the positioning block is a positioning ring.

[0015] Preferably, the metal piece is a metal hook.

[0016] Preferably, the elastic piece is an annular rubber rope, one end of which is hung on the metal hook, and the other end of which is hung on the fixing piece.

[0017] Preferably, the fixing piece is a stop lever.

[0018] Preferably, the upper end face and / or the lower end face of the magnet is provided with a non-metal film.

[0019] Preferably, the metal hook comprises a contact part and a hook part. The contact part is used to contact the soft metal light film sheet, and one end of the elastic piece is hung on the hook part.

[0020] Preferably, the contact part is provided with a non-metal film on the contact surface of the soft metal light film sheet.

[0021] Preferably, the non-metal film is made of CPP, PE, PVC, medical adhesive tape or polyimide film material.

[0022] According to the application, a clamping method of the soft metal light film sheet is provided, which adopts the clamping device of the soft metal light film sheet and the following steps.

[0023] Step 1, connecting the metal part with the elastic part to form a first assembly.

[0024] Step 2, finding the center position of the soft metal light film sheet, and installing the first assembly and the magnet on the lower surface and the upper surface of the center position respectively to form a soft metal light film sheet assembly.

[0025] Step 3, installing the soft metal light film sheet assembly to the corresponding position of the positioning block.

[0026] Step 4, connecting the other end of the elastic part with the fixing part.

[0027] Step 5, fixing the two ends of the fixing part to the bottom surface of the positioning block.

[0028] Compared with the prior art, the application has the following beneficial effects:

[0029] 1. The application realizes the non-direct contact flexible clamping of the soft metal light film sheet, and the non-metal film is arranged on the contact part of the metal hook and the surface of the magnet, which protects the surface quality of the soft metal light film sheet to the greatest extent by the mutual contact of the non-metal film and the soft metal light film sheet.

[0030] 2. The application realizes the clamping of the soft metal light film sheet by the cooperation of the magnet, the metal hook and the annular rubber rope, and the thickness, height and weight of the magnet are greatly reduced compared with the pressing block and the pressing plate, so that the interference caused by the subsequent laser processing and protective gas blowing is small, and the problem of large surface stress of the soft metal light film sheet caused by the pressing block and the pressing plate is avoided. 3. The application can control the length of the annular rubber rope by winding the annular rubber rope on the blocking rod, so as to realize the flexible control of the clamping force of the soft metal light film sheet. BRIEF DESCRIPTION OF DRAWINGS

[0031] Other features, objects and advantages of the application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0032] Figure 1 The accompanying drawings are schematic diagrams of the application;

[0033] Figure 2A working state schematic diagram of the present application.

[0034] The figure shows:

[0035] DETAILED DESCRIPTION

[0036] The present application will be described in detail below with specific examples. The following examples will help those skilled in the art to further understand the present application, but do not limit the present application in any form. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of changes and improvements can be made. These are within the scope of the present application.

[0037] The present application provides a soft metal light film piece clamping device, as shown in Figure 1 As shown in Figure 2 It comprises a positioning block 1, a metal piece 2, a magnet 3, an elastic piece 4 and a fixing piece 6.

[0038] The positioning block 1 is provided with a mounting groove 11, which is arranged at one end of the positioning block 1, and the fixing piece 6 is arranged at the other end of the positioning block 1. The mounting groove 11 is used to accommodate the soft metal light film piece 7. The soft metal light film piece 7 has a thickness of 0.5-1mm and a flatness of less than 0.02. The soft metal can be aluminum (L4-M) or copper (T2-M) (M represents soft state).

[0039] The positioning block 1 is provided with a hollow area 12. In a preferred example, the hollow area 12 is a center hollow area. The hollow area 12 comprises a first accommodating cavity 13 and a second accommodating cavity 14. The metal piece 2 is accommodated in the first accommodating cavity 13, and the elastic piece 4 is accommodated in the second accommodating cavity 14. One end of the elastic piece 4 is detachably connected to the metal piece 2, and the other end of the elastic piece 4 is detachably connected to the fixing piece 6. The first accommodating cavity 13 is in communication with the mounting groove 11.

[0040] The magnet 3 is located in the mounting groove 11 and at the top end of the soft metal light film piece 7. The magnet 3 and the metal piece 2 are magnetically attracted to each other, so as to fix the soft metal light film piece 7 in the mounting groove 11. That is, the soft metal light film piece is fixed between the metal hook and the magnet 3.

[0041] In a preferred embodiment, the positioning block 1 is a positioning ring; the metal piece 2 is a metal hook, preferably a steel hook; the elastic piece 4 is a ring-shaped rubber rope, one end of which is hung on the metal hook, and the other end of which is hung on the fixing piece 6. The fixing piece 6 is a stop lever. The length of the ring-shaped rubber rope can be determined according to the stress condition of the soft metal light film sheet, so as to realize flexible clamping and fixing of the soft metal light film sheet.

[0042] The positioning block 1 is made of aluminum alloy material, and a plurality of installation grooves 11 of different sizes for the soft metal light film sheet can be arranged on the positioning block 1, preferably five kinds. The installation grooves 11 can meet the clamping needs of soft metal light film sheets of various sizes. The surface roughness of the installation grooves 11 is required to be Ra0.4, and the surface is flat, smooth, scratch-free, indentation-free, and rust-free. The surface is subjected to sulfuric acid anodizing treatment for installing the soft metal light film sheet. The hollow area 12 is located at the center of the positioning ring. In a preferred embodiment, the hollow area 12 is a straight-through structure of a center hole, which is used to assist the soft metal light film sheet clamping device to fix the soft metal light film sheet.

[0043] The metal piece 2 is a metal hook made of 45# steel material, and the surface is galvanized to prevent rust. In a preferred embodiment, the metal hook includes a contact part 21 and a hook part 22. The contact part 21 is used to contact the soft metal light film sheet. A mounting hole 221 with a width of 4mm is arranged on the hook part 22, which is used to accommodate and suspend the ring-shaped rubber rope. Preferably, a layer of non-metal film is pasted on the contact surface of the contact part 21 and the soft metal light film sheet. Preferably, the non-metal film is a non-metal thin film, preferably a transparent adhesive tape. The material of the transparent adhesive tape is CPP, PE, PVC, medical adhesive tape, polyimide film, etc.

[0044] In a preferred embodiment, the soft metal light film sheet has several sizes: an outer diameter of φ96mm, and a notch position at φ65mm; or an outer diameter of φ80mm, and a notch position at φ60mm; or an outer diameter of φ40mm, and a notch position at φ30mm. The magnet 3 is a standard part in the form of a button, with a diameter of φ19mm-φ25mm. As can be seen, when the soft metal light film sheet is clamped by using the present scheme, since the magnet scheme is adopted, a large-area, thick, and heavy pressing block and pressing plate are not needed. The area occupied by the magnet on the soft metal light film is small, so the interference caused by the laser processing and protective gas blowing processes is small. Moreover, the weight of the magnet is small, which avoids the problem of large stress on the surface of the soft metal light film sheet caused by the pressing block and the pressing plate.

[0045] The upper and lower end faces of the magnet 3 are pasted with a layer of non-metallic film, preferably transparent tape. The non-metallic film mainly functions to avoid surface quality problems such as scratches and bumps caused by direct contact between the magnet and the light film sheet when the metal hook and the magnet 3 are used and disassembled. Preferably, the non-metallic film is provided on both sides of the magnet 3, so that any of the upper and lower sides of the magnet 3 can be in contact with the soft metal light film sheet 7 during use, that is, there is no need to select the attractive side during use, which can reduce the problem of bumps and scratches caused by incorrect flipping of the magnet attractive direction.

[0046] In a preferred embodiment, the elastic member 4 is a ring-shaped rubber rope, which is a standard part, and the length is preferably 150 mm. One end of the ring-shaped rubber rope is hung on the metal hook, and the other end is hung on the stop rod. The length of the ring-shaped rubber rope can be selected by the operator according to the clamping force, and the length of the rubber rope can be controlled by winding the ring-shaped rubber rope around the stop rod or selecting different specifications of the ring-shaped rubber rope.

[0047] In a preferred embodiment, the fixing member 6 is a stop rod, which is an elongated shaft and has no limitation on the material. The rod passes through the other end of the ring-shaped rubber rope, and the two ends of the stop rod are supported on the bottom end of the positioning block 1. Specifically, the stop rod can be wooden and used to hang the ring-shaped rubber rope.

[0048] Preferably, the mounting hook 5 is a standard part for deepening into the through hole of the positioning ring, pulling up the one end of the ring-shaped rubber rope passing through the metal hook, and assisting in hanging the one end of the ring-shaped rubber rope on the stop rod.

[0049] The present application is a flexible clamping device that can not be directly fixed and clamped (i.e., the metal hook and the magnet 3 do not directly contact the soft metal light film sheet, but contact the soft metal light film sheet through a non-metallic film), can control the clamping force, and can quickly and efficiently realize the clamping and fixing of the soft metal light film sheet, thereby improving the quality and efficiency of milling.

[0050] The present application also provides a clamping method for a soft metal light film sheet, which adopts the soft metal light film sheet clamping device, further comprises a mounting hook 5, and the following steps:

[0051] Step 1, connecting the metal part 2 and the elastic member 4 to form a first assembly. Preferably, the ring-shaped rubber rope is inserted into the hook of the metal hook to form the first assembly.

[0052] Step 2, finding the center position of the soft metal light film sheet, and installing the first assembly and the magnet 3 on the lower surface and the upper surface of the center position, respectively. Specifically, the side of the first assembly with the non-metallic film is in contact with the soft metal light film sheet, and the magnet 3 with the non-metallic film is in direct contact with the soft metal light film sheet, thereby forming a soft metal light film sheet assembly.

[0053] Step 3, install the soft metal light film piece assembly to the corresponding position of the positioning block 1. Preferably, the positioning block 1 is a positioning ring, and the corresponding position is the installation groove 11 and the hollow area 12; the size of the installation groove 11 is φ98mm.

[0054] Step 4, connect the other end of the elastic member 4 with the fixing member 6.

[0055] Specifically, use one end of the installation hook 5 to hook the other end of the elastic member 4 passing through the metal hook; then use the fixing member 6 (preferably, a stop rod) to pass through the elastic member 4 (preferably, a ring-shaped rubber rope), and the length of the ring-shaped rubber rope can be controlled by winding the ring-shaped rubber rope on the stop rod, so as to realize the flexible clamping force control. More specifically, use one end of the installation hook 5 to hook the other end of the elastic member 4 passing through the metal hook, use the stop rod to suspend and fix the other end of the elastic member 4, and the ring-shaped rubber rope is wound on the stop rod for 2 turns. Preferably, the installation hook 5 is a standard part, and the outer shape size is φ1mm*50mm*10mm, which is used to hook the ring-shaped rubber rope and hang the ring-shaped rubber rope on the stop rod.

[0056] Step 5, fix the two ends of the fixing member 6 on the bottom surface of the positioning block 1.

[0057] The present application can fix the center of the soft metal light film piece by using the metal member 2 and the magnet 3, can position the outer circle of the soft metal light film piece by using the positioning block 1, and can realize the flexible clamping force control by replacing the elastic member 4 or adjusting the length of the elastic member 4, so as to improve the clamping precision of the soft metal light film piece.

[0058] The present application realizes the non-direct contact flexible clamping of the soft metal light film piece, sets a non-metal film on the contact part 21 of the metal hook and the surface of the magnet 3, and maximally protects the surface quality of the soft metal light film piece. The present application solves the problems of scratch, poor flatness and interference caused by the contact clamping, greatly improves the processing efficiency and quality of the soft metal light film piece, and provides a strong foundation support for ensuring the smooth and high-quality completion of the model task. The present application can realize the laser processing of soft metal light film pieces of various specifications by setting positioning grooves of different diameters of soft metal light film pieces on the positioning ring, improves the processing efficiency, and reduces the management cost. The present application controls the length of the ring-shaped rubber rope by winding the ring-shaped rubber rope on the stop rod, so as to realize the flexible control of the clamping force of the soft metal light film piece. The present application adopts the magnetic + steel metal attraction fixing mode, which has great advantages in not needing to select the attraction direction compared with the electromagnetic attraction fixing mode, can reduce the scratch problem caused by the error flip of the electromagnetic attraction direction, and can effectively reduce the low-level quality problems. The metal hook of the present application adopts a hook structure, which is convenient for the suspension of the ring-shaped rubber rope. The present application is simple to use, has good adaptability to the clamping and fixing of the soft metal light film piece, and has good application effect in actual products.

[0059] Using the soft metal light film piece clamping device provided by the application, after clamping and fixing through the above method, the clamping precision of the soft metal light film piece is effectively guaranteed, the processing problems such as surface scratch, pit, poor flatness and laser head interference of the soft metal light film piece are solved, the processing efficiency, qualified rate and quality stability of the product are improved, and the application effect is good in actual products.

[0060] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0061] The specific embodiments of the present application are described above. It should be understood that the present application is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essential content of the present application. The embodiments of the present application and the features in the embodiments can be arbitrarily combined with each other without conflict.

Claims

1. A clamping device for a soft metallic optical thin film, characterized in that, It includes a positioning block (1), a metal part (2), a magnet (3), an elastic part (4), and a fixing part (6); The positioning block (1) is provided with a mounting groove (11), which is located at one end of the positioning block (1). The fixing member (6) is installed at the other end of the positioning block (1). The mounting groove (11) is used to accommodate a soft metal light film (7). The soft metal light film (7) is a soft metal film structure with a thickness of 0.5-1mm and a flatness of less than 0.

02. The positioning block (1) is provided with a hollow area (12), the hollow area (12) includes a first receiving cavity (13) and a second receiving cavity (14); the receiving metal part (2) is located in the first receiving cavity (13), the elastic part (4) is located in the second receiving cavity (14), one end of the elastic part (4) is detachably connected to the metal part (2), and the other end of the elastic part (4) is detachably connected to the fixing part (6); the first receiving cavity (13) is connected to the mounting groove (11); The magnet (3) is located in the mounting groove (11) and at the top of the soft metal light film (7). The magnet (3) and the metal part (2) are magnetically attracted to each other to fix the soft metal light film (7) in the mounting groove (11). The metal part (2) is a metal hook; The elastic element (4) is a ring-shaped rubber rope, one end of which is hung on the metal hook and the other end of which is hung on the fixing element (6). The fixing component (6) is a stop bar; The upper and / or lower surfaces of the magnet (3) are provided with a non-metallic film; The metal hook includes a contact part (21) and a hook part (22). The contact part (21) is used to contact the soft metal light film. One end of the elastic member (4) is hung on the hook part (22). A non-metallic film is provided on the contact surface between the contact portion (21) and the soft metallic thin film; The length of the looped rubber rope is controlled by winding it around the stop bar, thereby achieving flexible control of the clamping force on the soft metal optical film sheet; The contact area between the magnet (3), the metal part (2) and the soft metal light film (7) is smaller than the area of ​​the soft metal light film (7).

2. The soft metal optical thin film clamping device according to claim 1, characterized in that, The positioning block (1) is a positioning ring.

3. The soft metal optical thin film clamping device according to claim 1, characterized in that, The non-metallic membrane is made of CPP, PE, PVC, medical tape, or polyimide film material.

4. A method for clamping a soft metallic optical thin film, characterized in that, The soft metallic optical thin film clamping device according to any one of claims 1-3 is used, and the following steps are performed: Step 1: Connect the metal part (2) and the elastic part (4) to form the first component; Step 2: Locate the center position of the soft metal optical thin film, and install the first component and magnet (3) on the lower and upper surfaces of the center position respectively to form a soft metal optical thin film assembly; Step 3: Install the soft metal optical thin film assembly into the corresponding position on the positioning block (1); Step 4: Connect the other end of the elastic element (4) to the fixing element (6); Step 5: Fix both ends of the fastener (6) to the bottom surface of the positioning block (1).

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