A spline cutting tool for detecting small-sized metallized films

Abstract

The present invention discloses a spline cutting tool for detecting small-sized metallized films, which relates to the technical field of metallized film detection. It includes a cutting member for cutting a metal thin film coil sleeved on a hollow sleeve; and a power assembly for driving the cutting member to perform cutting along a U-shaped movement path. The structure of the present invention is reasonable. When the device is in use, it does not directly contact the metallized film, which can effectively avoid the appearance of scratches, indentations or creases. Moreover, the operation is directly carried out on the coil, which is convenient and fast. And multiple splines can be obtained by one-time cutting without repeated operations. The present invention uses the power assembly to drive a laser cutter to cut the metal coil along a U-shaped movement path, and uses the assembly to control the distance for standardized cutting. When cutting, the angle of the moving laser cutter changes, and it can always be perpendicular to the outer surface of the coil, avoiding waste caused by uneven cutting depth of the laser cutter during cutting, resulting in incomplete cutting of some materials.

Description

Technical Field

[0001] The present invention relates to the technical field of metallized film detection, and particularly to a spline cutting tool for detecting small-sized metallized films. Background Art

[0002] The thickness of the metal coating in the metallized film for capacitors is a main index of the metallized film. Since it is difficult to detect the thickness of the metal coating, the sheet resistance of the metallized coating is used as the criterion for judging the thickness of the metallized film coating in the industry. The sheet resistance is generally tested by the probe test method. In the field of small-sized thin films, due to the small product size, the size of the probe will affect the accuracy of the sheet resistance test. At this time, the metallized film needs to be cut into strips of a certain length. Generally, multiple strip-shaped metallized films are required, and then the average sheet resistance test method is used for testing. In this process, how to cut accurately becomes the key to the problem.

[0003] Currently, during cutting, usually one end of the coil (i.e., the metallized film wound around the hollow sleeve) is pinched and unfolded, and then the unfolded metallized film is pressed by a ruler or a corresponding flat-grooved tooling to measure the size and then cut into appropriate length and width with a blade for testing. On the one hand, it is necessary to press the metallized film, which may cause a certain degree of damage to the coating (i.e., scratching damage, indentation or crease) during the whole operation process, affecting the true value of the sheet resistance; on the other hand, the process of aligning the measuring tool / tooling and the size of the metallized film is less efficient, which is not conducive to factory detection. At the same time, only a single piece of metallized film can be obtained after each cutting, and multiple cutting operations need to be repeated, further reducing the efficiency. Therefore, the present application provides a spline cutting tool for detecting small-sized metallized films to meet the requirements. Summary of the Invention

[0004] The purpose of the present application is to provide a spline cutting tool for detecting small-sized metallized films to solve the problems of low cutting efficiency and affecting the true value of subsequent sheet resistance detection in the prior art.

[0005] To achieve the above purpose, the present application provides the following technical solution: A spline cutting tool for detecting small-sized metallized films, comprising

[0006] A cutting member for cutting the metal film coil sleeved on the hollow sleeve;

[0007] A power assembly for driving the cutting member to perform cutting along a U-shaped movement path.

[0008] Preferably, the cutting member includes a laser cutter with a cylindrical structure, and an upper arc-shaped limiting plate and a lower arc-shaped limiting plate are respectively fixed on the upper and lower parts of the laser cutter;

[0009] The power assembly includes an arc-shaped plate on which a U-shaped through cavity and a U-shaped groove are respectively arranged. The concave surface of the arc-shaped plate is adapted to the outer surface of the metal film coil. A protective cover is fixed at the bottom of the arc-shaped plate, and a power motor is installed inside the protective cover. The output shaft of the power motor penetrates the arc-shaped plate and is fixedly connected to a driving ring. A groove is provided on the arc-shaped plate and a cross bar is fixed in the groove. A slider is slidably arranged on the cross bar, and the slider is penetrated by a square rod. One end of the square rod is rotatably connected to a sliding sleeve, and the sliding sleeve is slidably sleeved on the laser cutter. The other end of the square rod is fixedly provided with an L-shaped rod, and the lower end of the L-shaped rod passes through an opening cavity on the driving ring and extends into the U-shaped groove. The protective cover is fixed at the upper end of the handle. A control switch for controlling the forward or reverse rotation of the power motor is arranged on the outer wall of the handle. A power supply for providing electrical energy for the laser cutter is installed in the inner cavity of the handle;

[0010] The lower end surfaces of the upper arc-shaped limiting plate and the lower arc-shaped limiting plate are respectively attached to the upper and lower surfaces of the arc-shaped plate. The laser emitted by the laser emitting head of the laser cutter is perpendicular to the outer surface of the metal film coil;

[0011] It further includes a limiting assembly for limiting the cutting height of the laser cutter and the width of the strip-shaped metal film cut off.

[0012] Preferably, the limiting assembly includes a hollow cylinder with the same inner diameter as the hollow sleeve. A blocking plate is fixed at the right end of the hollow cylinder, and the diameter of the blocking plate is larger than the inner diameter of the hollow sleeve. The blocking plate is connected to the handle through a connecting rod.

[0013] Preferably, it further includes a positioning assembly for ensuring the stable cutting of the laser cutter. The positioning assembly includes mounting plates arranged in a circumferential distribution in the inner cavity of the hollow cylinder and provided with mounting grooves. Limiting strips are slidably arranged in the mounting grooves of the mounting plates. A second airbag is arranged between the lower end of the limiting strip and the bottom of the inner cavity of the mounting groove. One end of the connecting rod is fixedly provided with a square block, and the square block is slidably arranged in the square cavity of the housing. The upper end of the housing is fixedly connected to the lower end of the handle. A first airbag is installed at the upper end of the square block, and the first airbag is connected to a connecting pipe penetrating the connecting rod. The connecting pipe is respectively connected to the corresponding second airbags through a plurality of branch pipes. A plurality of openings adapted to the mounting grooves of the corresponding mounting plates are provided on the outer wall of the hollow cylinder. An activity port adapted to the connecting rod is arranged on the outer wall of the housing.

[0014] Preferably, a plurality of blocking columns are fixed at the upper end of the square block. When the blocking columns contact the top of the inner cavity of the housing, the height of the laser cutter at this time is the standard laser cutting height.

[0015] Preferably, ball bearings that are in rolling contact with the inner wall of the square cavity are arranged on the four end faces of the square block except for the upper and lower ends.

[0016] Preferably, the limiting component includes two oppositely arranged L-shaped limiting plates, and both of the two L-shaped limiting plates are fixedly installed at the lower end of the arc-shaped plate.

[0017] In summary, the technical effects and advantages of the present invention are as follows:

[0018] The structure of the present invention is reasonable. When the device is in use, it does not directly contact the metallized film, which can effectively avoid the appearance of scratches, indentations or creases, and does not affect the true value of the sheet resistance of the sample strip or the performance of some coils. Moreover, the operation is directly carried out on the coil, which is convenient and fast. And multiple sample strips can be obtained by one-time cutting without repeated operations. The present invention uses a power component to drive a laser cutter to cut the metal coil along a U-shaped movement path, and uses a component to control the distance for standardized cutting. When cutting, the angle of the moving laser cutter changes and can always be perpendicular to the outer surface of the coil, avoiding waste caused by uneven cutting depth when the laser cutter cuts and resulting in incomplete cutting of some materials.

[0019] In the present invention, a positioning component is further included. Due to the gravity of the handle and the components arranged on the arc-shaped plate, the conical positioning column is inserted into the hollow sleeve, making the hollow cylinder fixed to the coil, which is beneficial to the stable cutting of the device and also reduces the load on the hand. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0022] Figure 2 For the present invention Figure 1 The structural schematic diagram of the cutting member in it;

[0023] Figure 3 For the present invention Figure 1 The partial structural schematic diagram of the power component in it;

[0024] Figure 4 For the present invention Figure 1 The side view structural schematic diagram in it;

[0025] Figure 5 For the present invention Figure 1 The partial disassembled structural schematic diagram in it;

[0026] Figure 6 For the present inventionFigure 5 Schematic diagram of the structure at A in the middle;

[0027] Figure 7 For the present invention Figure 5 Schematic diagram of the large structure at B in the middle;

[0028] Figure 8 For the present invention Figure 6 Schematic diagram of the split structure of the middle mounting plate;

[0029] Figure 9 This is a diagram of the present invention and the coiled material plug-in installation;

[0030] Figure 10 This is the installation position diagram of the L-shaped limiting plate of the present invention.

[0031] In the figure: 1. handle; 2. protective cover; 3. power assembly; 31. arc plate; 32. U-shaped cavity; 33. U-shaped groove; 34. sliding sleeve; 35. square rod; 36. slider; 37. control switch; 38. L-shaped rod; 39. drive ring; 310. cross bar; 4. cutting piece; 41. laser cutter; 42. upper arc limit plate; 43. lower arc limit plate; 5. connecting rod; 6. hollow cylinder; 7. blocking plate; 8. positioning assembly; 81. opening; 82. mounting plate; 83. limiting strip; 84. conical positioning column; 85. branch pipe; 86. connecting pipe; 87. shell; 88. square block; 89. first airbag; 810. second airbag; 811. blocking column; 812. ball; 9. L-shaped limit plate. Implementation Method

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] Example: Reference Figure 1 A small-sized metallized film inspection spline cutting tool is shown, comprising

[0034] Cutting element 4, used for cutting the metal film coiled material sleeved on the hollow sleeve;

[0035] The power assembly 3 is used to drive the cutting member 4 to cut along a U-shaped motion path.

[0036] As a preferred implementation in this embodiment, Figures 1-4As shown, the cutting member 4 includes a laser cutter 41 with a cylindrical structure, and an upper arc-shaped limiting plate 42 and a lower arc-shaped limiting plate 43 are respectively and fixedly arranged on the upper and lower parts of the laser cutter 41; the power assembly 3 includes an arc-shaped plate 31 on which a U-shaped through cavity 32 and a U-shaped groove 33 are respectively arranged. The concave surface of the arc-shaped plate 31 is adapted to the outer surface of the metal thin film coil. A protective cover 2 is fixedly arranged at the bottom of the arc-shaped plate 31, and a power motor is installed in the protective cover 2. The output shaft of the power motor penetrates through the arc-shaped plate 31 and is fixedly connected to a driving ring 39. A groove is arranged on the arc-shaped plate 31 and a cross bar 310 is fixedly arranged in the groove. A slider 39 is slidably arranged on the cross bar 310. The slider 39 is penetrated by a square rod 35. One end of the square rod 35 is rotatably connected to a sliding sleeve 34. The sliding sleeve 34 is slidably sleeved on the laser cutter 41. The other end of the square rod 35 is fixedly provided with an L-shaped rod 38, and the lower end of the L-shaped rod 38 passes through an opening cavity arranged on the driving ring 39 and extends into the U-shaped groove 33. The protective cover 2 is fixed to the upper end of the handle 1. A control switch 311 for controlling the forward or reverse rotation of the power motor is arranged on the outer wall of the handle 1. A power supply for supplying electric energy to the laser cutter 41 is installed in the inner cavity of the handle 1; the lower end surfaces of the upper arc-shaped limiting plate 42 and the lower arc-shaped limiting plate 43 are respectively attached to the upper and lower surfaces of the arc-shaped plate 31. The laser emitted by the laser emitter of the laser cutter 41 is perpendicular to the outer surface of the metal thin film coil; a limiting assembly for limiting the cutting height of the laser cutter 41 and the width of the strip-shaped metal thin film cut off is also included.

[0037] When the device is in use, the arc-shaped plate 31 can be placed above the metal thin film coil. The arc-shaped plate 31 and the handle 1 are both suspended. The distance between the laser cutter 41 and the outer surface of the metal thin film coil and the distance between the handle 1 and the end of the coil are controlled by the limiting assembly. During operation, the power motor is controlled to drive the driving ring 39 to rotate by pressing the control switch 37. When the driving ring 39 rotates, it can make the L-shaped rod 38 move along the path of the U-shaped groove 33 by squeezing the L-shaped rod 38. The U-shaped trajectory movement of the L-shaped rod 38 will drive the laser cutter 41 to move along its arc surface on the arc-shaped plate 31 in a U-shaped trajectory movement through the square rod 35, and perform U-shaped cutting starting from the edge of the metal thin film coil. After cutting is completed, the long strip-shaped metal thin film strip can be taken off from the coil, and the operation is convenient and simple;

[0038] When in use, the device does not come into direct contact with the metallized film, which can effectively avoid scratches, indentations or creases on the metallized film, and avoid affecting the actual value of the spline resistance. The device can be operated directly on the coil, which is convenient and fast. By cutting with a laser cutter 41, multiple layers can be cut at one time to obtain multiple splines without repeated operations. Standardized cutting is performed through the cooperation of the U-shaped cavity 32 (which limits the length of the spline, and the length of the U-shaped cavity 32 is the standard cutting length) and the limit component (which limits the number of splines cut at one time and the width of the spline).

[0039] It should be noted that, first, the square structure of the square rod 35 can limit the L-shaped rod 38, preventing the L-shaped rod 38 from rotating when the driving ring 39 drives the L-shaped rod 38 to move, thereby causing the lower end of the L-shaped rod 38 to move out of the U-shaped groove 33, affecting the U-shaped cutting movement of the laser cutter 41; second, the upper arc-shaped limit plate 42 and the lower arc-shaped limit plate 43 are respectively fitted with the upper and lower arc-shaped surfaces of the arc plate 31, the purpose of which is to ensure that when the laser cutter performs U-shaped motion cutting, the laser emitted by the laser cutter 41 can always be perpendicular to the outer surface of the metal film coil, thereby avoiding uneven cutting depth of the laser cutter 41 during cutting, resulting in incomplete cutting of part of the material, and avoiding waste of material; third, when using this device for cutting, the driving ring 39 of this device only rotates half a circle each time the cutting movement to drive the laser cutter 41 to perform U-shaped motion, and perform forward and reverse intermittent motion; fourth, the laser cutter 41 is on the arc plate 3 1. When the upper U-shaped movement is performed, the angle of the laser cutter 41 will change due to the restrictions of the upper arc-shaped limit plate 42 and the lower arc-shaped limit plate 43. In order to prevent the square rod 35 from obstructing the movement of the laser cutter 41, the square rod 35 is rotatably connected to the sliding sleeve 34, and the sliding sleeve 34 is slidably mounted on the laser cutter 41. Fifth, the lower concave arc surface of the arc plate 61 is consistent with the upper convex arc surface; Sixth, the device uses the laser cutter 41 for laser cutting. Through laser cutting, the cutting position and shape can be accurately controlled, while minimizing the thermal impact and mechanical stress on the metallized film, thereby maintaining the square resistance performance of the metallized film and achieving high-quality cutting; Seventh, when the device is used for sampling detection, it will cut multiple strips of metal films in different areas at one time, which is convenient for the detection of the average square resistance test method; Eighth, the parameters of the laser cutter 41 can be adjusted to determine the number of metallized film strips formed by one-time cutting.

[0040] As a preferred implementation in this embodiment, Figure 1As shown, the limiting component includes a hollow cylinder 6 with an inner diameter consistent with that of the hollow sleeve. A baffle plate 7 is fixed to the right end of the hollow cylinder 6, and the diameter of the baffle plate 7 is greater than the inner diameter of the hollow sleeve. The baffle plate 7 is connected to the handle 1 through a connecting rod 5. Before the driving power motor works, the device is held vertically (at this time, the hollow cylinder 6 is located below the arc-shaped plate 31), and one end of the hollow cylinder 6 is inserted into the inner cavity of the hollow sleeve, and the baffle plate 7 forms a block with the side end of the hollow sleeve. At this time, the height of the laser cutter 41 is the standard cutting height and the width of the strip-shaped metal film cut is also limited, which is beneficial to high-precision cutting.

[0041] It should be noted that, first, limiting the cutting height is to limit the cutting depth of the coil, and since the thickness of each metallized film is the same, it is to limit the number of strip-shaped metal films formed after cutting; second, the design of the structure of this limiting component makes any component of this device not contact the metallized film, which does not affect the sheet resistance performance of the sampling strip and also does not affect the performance of the uncut coil.

[0042] As a preferred implementation manner in this embodiment, as Figures 5-8 shown, it further includes a positioning component 8 for ensuring the stable cutting of the laser cutter 41. The positioning component 8 includes a mounting plate 82 with mounting grooves distributed circumferentially in the inner cavity of the hollow cylinder 6, and a limiting strip 83 is slidably arranged in the mounting groove of the mounting plate 82. A second airbag 810 is arranged between the lower end of the limiting strip 83 and the bottom of the inner cavity of the mounting groove. One end of the connecting rod 5 is fixed with a square block 88, and the square block 88 is slidably arranged in the square cavity of the housing 87. The upper end of the housing 87 is fixedly connected to the lower end of the handle 1. A first airbag 89 is installed at the upper end of the square block 88, and the first airbag 89 is connected to a connecting pipe 86 passing through the connecting rod 5. The connecting pipe 86 is connected to the corresponding second airbags 810 through a plurality of branch pipes 85. A plurality of openings 81 adapted to the mounting grooves of the corresponding mounting plates 82 are provided on the outer wall of the hollow cylinder 6, and a movable opening adapted to the connecting rod 5 is provided on the outer wall of the housing 87.

[0043] To prevent the laser cutter 41 from being unstable due to the hand position when holding this device for cutting, resulting in non-standardized strip-shaped metal films being cut, a positioning component 8 is provided. During use, the hollow cylinder 6 can be inserted into the annular cavity of the hollow sleeve, and the blocking plate 7 forms a block with the side end of the hollow sleeve. At this time, the hand holding the handle 1 can be loosened. Due to the gravitational action of the components provided on the handle 1 and the arc-shaped plate 31, the first airbag 89 contacts the top of the inner cavity of the housing 87 to form extrusion. At this time, the gas in the extruded first airbag 89 will enter the inner cavities of multiple second airbags 810 respectively through the cooperation of the connecting pipe 86 and the branch pipe 85. At this time, the second airbags 810 will expand and move outwards, so that the tip of the conical positioning column 84 contacts the hollow sleeve and partially inserts into the hollow sleeve, fixing the hollow cylinder 6 to the coil (while also reducing the load-bearing burden on the hand). As long as no upward force is applied to the handle 1, this device will maintain a good stable state with the coil.

[0044] It should be noted that, first, the hollow sleeve is generally made of plastic or paper products, which are easily pierced by the tip of the conical positioning column 84; second, the outer surface of the conical positioning column 84 is set as a smooth surface, which can reduce the frictional force with the hollow sleeve and is beneficial for the subsequent automatic restoration of the conical positioning column 84 to its original position by the elastic force of the extruded first airbag 89 (when the person drives the handle 1 to move upwards, the conical positioning column 84 is driven by the elastic force of the first airbag 89 to release the insertion with the hollow sleeve).

[0045] As a preferred implementation manner in this embodiment, as Figure 7 shown, several blocking columns 811 are fixed to the upper end of the square block 88. When the blocking columns 811 contact the top of the inner cavity of the housing 87, the height of the laser cutter 41 at this time is the standard laser cutting height, that is, when the hollow cylinder 6 is inserted into the hollow sleeve, the top of the inner cavity of its housing 87 will squeeze the first airbag 89 under the gravitational action of the handle 1, the arc-shaped plate 31 and the components thereon and finally contact the blocking columns 811, which can effectively ensure the consistency of the laser cutting height.

[0046] As a preferred implementation manner in this embodiment, as Figure 7 shown, ball bearings 812 that are in rolling contact with the inner wall of the square cavity are provided on the four end faces of the square block 88 except for the upper and lower ends. The function of the ball bearings 812 is to reduce the frictional force between the square block 88 and the inner wall of the housing 87, so that most of the gravitational action of the handle 1, the arc-shaped plate 31 and the components thereon all act on the first airbag 89, which is beneficial for the contact between the top of the inner cavity of the housing 87 and the blocking columns 811.

[0047] As a preferred implementation manner in this embodiment, as Figure 9As shown, the limiting assembly includes two relatively arranged L-shaped limiting plates 9, and the two L-shaped limiting plates 9 are fixedly installed at the lower end of the arc plate 31. When in use, the L-shaped limiting plates 9 can be used to contact the outer surface and side end of the coil to form a barrier, which can effectively ensure the cutting height of the laser cutter 41 and the width of the cut strip metal film. It has a simple structure and occupies little space.

[0048] It should be noted that in the process of contacting and separating the L-shaped limiting plate 9 from the outer surface and side end surface of the coil, it is easy to cause scratches or indentations on the outer surface of the coil, thereby affecting the square resistance performance of the uncut metallized film.

[0049] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A spline cutting tool for detecting small-sized metallized films, characterized in that: including a cutting member (4) for cutting a metal film coil sleeved on a hollow sleeve; a power assembly (3) for driving the cutting member (4) to perform cutting along a U-shaped movement path; the cutting member (4) includes a laser cutter (41) with a cylindrical structure, and an upper arc-shaped limiting plate (42) and a lower arc-shaped limiting plate (43) are respectively and fixedly arranged on the upper and lower parts of the laser cutter (41); the power assembly (3) includes an arc-shaped plate (31) provided with a U-shaped through cavity (32) and a U-shaped groove (33) respectively, the inner concave surface of the arc-shaped plate (31) is adapted to the outer surface of the metal film coil, a protective cover (2) is fixed at the bottom of the arc-shaped plate (31), a power motor is installed in the protective cover (2), an output shaft of the power motor penetrates through the arc-shaped plate (31) and is fixedly connected with a driving ring (39), a groove is provided on the arc-shaped plate (31) and a cross bar (310) is fixedly arranged in the groove, and a slider (36) is slidably arranged on the cross bar (310), the slider (36) is penetrated by a square rod (35), one end of the square rod (35) is rotatably connected with a sliding sleeve (34), the sliding sleeve (34) is slidably sleeved on the laser cutter (41), the other end of the square rod (35) is fixedly provided with an L-shaped rod (38), and the lower end of the L-shaped rod (38) passes through an open cavity provided on the driving ring (39) and extends into the U-shaped groove (33), the protective cover (2) is fixed at the upper end of a handle (1), a control switch (37) capable of controlling the forward or reverse rotation of the power motor is arranged on the outer wall of the handle (1), and a power supply capable of providing electric energy for the laser cutter (41) is installed in the inner cavity of the handle (1); the lower end surfaces of the upper arc-shaped limiting plate (42) and the lower arc-shaped limiting plate (43) are respectively attached to the upper and lower surfaces of the arc-shaped plate (31), and the laser emitted by the laser emitting head of the laser cutter (41) is perpendicular to the outer surface of the metal film coil; further including a limiting assembly for limiting the cutting height of the laser cutter (41) and the width of the strip-shaped metal film cut; the limiting assembly includes a hollow cylinder (6) with the same inner diameter as that of the hollow sleeve, a blocking plate (7) is fixed at the right end of the hollow cylinder (6), the diameter of the blocking plate (7) is larger than the inner diameter of the hollow sleeve, and the blocking plate (7) is connected with the handle (1) through a connecting rod (5); It further includes a positioning component (8) for ensuring stable cutting of the laser cutter (41). The positioning component (8) includes a mounting plate (82) that is circumferentially distributed in the inner cavity of the hollow cylinder (6) and has a mounting groove. A limiting strip (83) is slidably arranged in the mounting groove of the mounting plate (82). A conical positioning column (84) is installed at the upper end of the limiting strip (83). A second airbag (810) is arranged between the lower end of the limiting strip (83) and the bottom of the inner cavity of the mounting groove. One end of the connecting rod (5) is fixed with a square block (88). The square block (88) is slidably arranged in the square cavity of the housing (87). The upper end of the housing (87) is fixedly connected to the lower end of the handle (1). A first airbag (89) is installed at the upper end of the square block (88). The first airbag (89) is connected to a connecting pipe (86) that penetrates through the connecting rod (5). The connecting pipe (86) is connected to the corresponding second airbags (810) through a plurality of branch pipes (85). A plurality of openings (81) adapted to the mounting grooves of the corresponding mounting plates (82) are provided on the outer wall of the hollow cylinder (6). An activity port adapted to the connecting rod (5) is provided on the outer wall of the housing (87).

2. The spline cutting tool for detecting small-sized metallized films according to claim 1, wherein: A plurality of blocking columns (811) are fixed at the upper end of the square block (88). When the blocking columns (811) contact the top of the inner cavity of the housing (87), the height of the laser cutter (41) at this time is the standard laser cutting height.

3. A spline cutting tool for detecting small-sized metallized films according to claim 2, characterized in that: Ball bearings (812) that are in rolling contact with the inner wall of the square cavity are provided on the four end faces of the square block (88) except for the upper and lower ends.

4. A spline cutting tool for detecting small-sized metallized films according to claim 1, characterized in that: The limiting component further includes two oppositely arranged L-shaped limiting plates (9). Both of the L-shaped limiting plates (9) are fixedly installed at the lower end of the arc-shaped plate (31).

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