A method of processing a scale

Abstract

The application relates to the technical field of measuring tools and discloses a processing method of a scale, which comprises the following steps: fixing scale plate material on a splicing tool, splicing and marking on the plate material in multiple sections by a laser marking machine through the splicing tool, marking the obtained semi-finished product blank multiple times along a part contour by the laser marking machine to realize a cutting function, and finally polishing to obtain a finished product; the processing method of the scale has higher processing efficiency and economy compared with a mechanical processing method, has higher part stability and a better part appearance quality compared with a spraying method, and is especially suitable for processing an ultrathin long scale.

Description

Technical Field

[0001] This invention relates to the field of measuring tool technology, and more specifically to a method for manufacturing a ruler. Background Technology

[0002] As aircraft hydraulic systems operate for extended periods, some fuel tanks require periodic checks to ensure safe fuel levels. To save space, facilitate portability, and increase aircraft payload, the corresponding fuel level detection device needs to be as thin and light as possible. Therefore, it is envisioned to design an ultra-thin scale as a component of the detection device. Previously, fuel level detection scales were generally over 1mm thick, but the ultra-thin scale design would reduce the thickness to around 0.2mm. This significant reduction in scale thickness makes existing manufacturing methods unsuitable. Furthermore, since it is used for detecting fuel levels in aircraft fuel tanks, the scale must have sufficient length and high-resolution markings.

[0003] Ultra-thin long rulers are difficult to clamp using conventional equipment. If existing machining methods are used, they are greatly affected by factors such as machine tool precision, stroke, and material flatness. During the machining process, defects such as missing or pierced graduations are prone to occur, and the final part shape produced by machining is poor and cannot meet the usage requirements. The graduations of existing rulers can also be formed by printing, copying, etc., but due to the limitations of the working conditions of ultra-thin long rulers, the lifespan of the graduation display will be significantly shortened, and the final shape of ultra-thin long rulers is also difficult to form, which also fails to meet the usage requirements. Summary of the Invention

[0004] The purpose of this invention is to address the problems of difficulty in forming and low efficiency in existing methods for processing ultra-thin rulers. This invention provides a method for processing rulers that can produce ultra-thin rulers with a thickness far below that of conventional rulers, and the processing length is not limited by the stroke of the processing equipment. Rulers produced by this method effectively improve the portability of rulers and optimize their volume and weight.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A method for manufacturing a ruler includes the following steps:

[0007] Preparation steps: Select the scale plate and make a splicing fixture for placing the plate. Make multiple positioning holes at intervals along the length of the splicing fixture, and the distance between adjacent positioning holes is less than or equal to the marking range of the laser marking machine. Fix the plate to the splicing fixture.

[0008] The worktable of the laser marking machine is connected to multiple limiting components. These multiple limiting components are used to fit multiple positioning holes, so that the splicing fixture can be detachably fixed to the worktable. Furthermore, the multiple limiting components can be matched with positioning holes at different positions to change the relative position of the splicing fixture and the worktable.

[0009] Marking steps: Select the appropriate positioning hole and limit component to fix a segment of the splicing fixture within the marking range of the laser marking machine. Set the working parameters and marking times of the laser marking machine to mark the scale on the sheet material in the current segment.

[0010] Adjust the positioning holes and limiting parts at different positions to fix another section of the splicing fixture within the marking range of the laser marking machine and complete the scale marking of the sheet metal in the current section;

[0011] Adjust the positioning holes and limiting parts at different positions multiple times until the marking work of the sheet metal in all sections of the splicing fixture is completed;

[0012] Cutting steps: Adjust the working parameters of the laser marking machine and increase the number of markings so that the laser marking machine can perform shape cutting on the sheet material in the current segment;

[0013] Adjust the positioning holes and limiting parts at different positions multiple times until the sheet metal in all sections of the splicing fixture is cut to obtain the final shape of the ruler.

[0014] Finishing steps: Remove glue from the cut boards and splicing fixtures, and polish the resulting scale to complete the processing.

[0015] The sheet metal is the raw material for processing the ruler. The size of the sheet metal is selected according to the design size of the ruler. The splicing fixture is used to place the sheet metal, so the size of the splicing fixture can be determined according to the size of the sheet metal. The spacing of the positioning holes can be reasonably determined according to the marking range of the laser marking machine actually used.

[0016] Since the positioning holes are distributed along the length of the splicing fixture, when the splicing fixture selects positioning holes in different areas to connect and fix with the limiting parts, the fixed position of the splicing fixture on the working plane will change accordingly. The range of position change of the splicing fixture can correspond to the entire processing area of ​​the sheet material. Thus, it is possible to complete long-distance marking work by splicing multiple marking segments based on the small marking range of the laser marking machine.

[0017] The scale processing method of the present invention, through the design and use of splicing fixtures, can effectively utilize a laser marking machine with a small marking range to achieve marking processing of a longer scale. Moreover, the splicing fixture changes the clamping object of the processing equipment, reducing the clamping difficulty of the sheet metal. It is especially suitable for processing ultra-thin scales. At the same time, compared with the processing of scales by inkjet printing, photocopying and other methods, laser marking has lower requirements for the flatness of the sheet metal itself, and the obtained scale clarity is higher, which improves the service life of the scale. It is suitable for the inspection of aircraft fuel tanks.

[0018] It also utilizes laser marking machines to directly replace traditional machining equipment, cleverly achieving the cutting of the ruler through multiple markings. This significantly improves the final shape of the ruler and facilitates its processing. It is especially suitable for cutting ultra-thin rulers, effectively improving the processing efficiency of ultra-thin rulers and reducing the defect rate of ruler processing.

[0019] In some alternative embodiments, during the preparation step: the sheet metal is glued and fixed to the splicing fixture, and the splicing fixture is used to fix multiple sheet metals at intervals.

[0020] In some alternative implementations, during the preparation step: multiple fixing holes are made on the worktable of the laser marking machine, and multiple limiting components are detachably installed into the fixing holes.

[0021] In some optional embodiments, in the preparation step: the limiting member is a connecting screw, one end of which is threaded to the fixing hole, and the other end of which forms a shaft hole clearance fit with the positioning hole, and the fit clearance is less than or equal to the basic hole fit clearance of H7 / h6.

[0022] In some optional embodiments, in the preparation step: the positioning holes are evenly spaced, and the distance between two adjacent positioning holes is less than the marking range of the laser marking machine;

[0023] Furthermore, the marking step also includes: after marking any segment, if a break occurs in the scale value at the edge, the laser marking machine is operated to mark the scale value completely, or the complete marking is reserved for the marking of adjacent segments.

[0024] In some alternative implementations, during the marking step, when marking the scale on the sheet metal within any segment, the outline of the scale is delineated.

[0025] In some alternative embodiments, in the finished product step: the ruler is first polished with sandpaper of 600 grit or higher, and then the ruler is polished a second time with sandpaper of 1000 grit or higher.

[0026] In some alternative embodiments, the sheet material is a thin metal sheet, and the finishing step further includes: rolling the polished ruler into shape to obtain a measuring tape.

[0027] In some alternative implementations, the sheet metal thickness is less than or equal to 0.2 mm, and the marking step is performed first, followed by the cutting step.

[0028] In some optional embodiments, in the marking step, the operating parameters of the laser marking machine are set as follows: marking speed is 1000 mm / s, frequency is 30 kHz, power is 25%, and the number of markings is set to 1.

[0029] In the cutting step, the operating parameters of the laser marking machine are set as follows: marking speed is 1000 mm / s, frequency is 40 kHz, power is 75%, and the number of markings is set to 25.

[0030] In some alternative implementations, the ruler has a thickness of 0.2 mm or less, a length of 500 mm or more, a width of 100 mm or less, and the length of the scale is 100 mm or more. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the scale described in the embodiment;

[0033] Figure 2 This is a schematic diagram of the assembly tooling described in the embodiment;

[0034] Figure 3 This is a three-dimensional schematic diagram of the splicing fixture described in the embodiment;

[0035] Figure 4 This is a schematic diagram of the connecting screw structure described in the embodiment;

[0036] Figure 5 This is a schematic diagram showing the result of marking the first section of the sheet metal as described in the embodiment;

[0037] Figure 6 This is a schematic diagram showing the result of marking the second section of the sheet metal as described in the embodiment;

[0038] Figure 7 This is a schematic diagram showing the result of marking the third section of the sheet metal as described in the embodiment;

[0039] Figure 8 This is a schematic diagram showing the result of marking the inner sheet metal of the fourth segment as described in the embodiment;

[0040] Figure 9 This is a schematic diagram showing the result of marking the fifth section of the sheet metal as described in the embodiment;

[0041] Figure 10 This is a schematic diagram showing the result of marking the sixth section of the sheet metal as described in the embodiment;

[0042] Markings in the diagram: 100 - ruler, 101 - scale, 102 - mounting hole, 110 - splicing fixture, 111 - positioning hole, 120 - connecting screw, 130 - sheet metal. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0044] This application is described below with reference to the accompanying drawings and specific embodiments:

[0045] Example

[0046] like Figures 1-10 As shown, a method for processing a scale ruler 100 according to the present invention includes the following steps:

[0047] Preparation steps: Select the plate material 130 of the scale ruler 100 and make the splicing fixture 110 for placing the plate material 130. Make multiple positioning holes 111 at intervals along the length direction of the splicing fixture 110, and the distance between adjacent positioning holes 111 is less than or equal to the marking range of the laser marking machine. Fix the plate material 130 to the splicing fixture 110.

[0048] The worktable of the laser marking machine is connected to multiple limiting components. These multiple limiting components are used to fit multiple positioning holes 111 so that the splicing fixture 110 can be detachably fixed to the worktable. Furthermore, the multiple limiting components cooperate with the positioning holes 111 at different positions to change the relative position of the splicing fixture 110 and the worktable.

[0049] Marking steps: Select the appropriate positioning hole 111 to cooperate with the limiting part so that a certain segment of the splicing fixture 110 is fixed within the marking range of the laser marking machine. Set the working parameters and marking times of the laser marking machine, and mark the scale 101 on the plate material 130 in the current segment.

[0050] Adjust the positioning holes 111 at different positions to cooperate with the limiting parts so that another segment of the splicing fixture 110 is fixed within the marking range of the laser marking machine, and the scale 101 marking of the plate 130 in the current segment is completed.

[0051] Adjust the positioning holes 111 at different positions to match the limiting parts multiple times until the marking work of the sheet metal 130 in all sections of the splicing fixture 110 is completed;

[0052] Cutting steps: Adjust the working parameters of the laser marking machine and increase the number of markings so that the laser marking machine can perform shape cutting on the sheet material 130 in the current segment;

[0053] Adjust the positioning holes 111 at different positions to match the limiting parts multiple times until the sheet metal 130 in all sections of the splicing fixture 110 is cut to obtain the final shape of the scale 100.

[0054] Finishing steps: Remove glue from the cut plate 130 and the splicing fixture 110, and polish the resulting scale 100 to complete the processing.

[0055] The sheet metal 130 is the raw material for processing the scale ruler 100. The size of the sheet metal 130 is selected according to the design size of the scale ruler 100. The splicing fixture 110 is used to place the sheet metal 130. Therefore, the size of the splicing fixture 110 can be determined according to the size of the sheet metal 130. The spacing of the positioning holes 111 can be reasonably determined according to the marking range of the laser marking machine actually used.

[0056] Since the positioning holes 111 are distributed along the length of the splicing fixture 110, when the splicing fixture 110 selects different areas of the positioning holes 111 to connect and fix with the limiting parts, the fixed position of the splicing fixture 110 on the working plane will change accordingly. The range of position change of the splicing fixture 110 can correspond to the entire processing area of ​​the sheet 130, thereby enabling long-distance marking work to be completed by splicing multiple marking segments based on the small marking range of the laser marking machine.

[0057] The method for processing the scale ruler 100 of the present invention, through the design and use of the splicing fixture 110, can effectively utilize a laser marking machine with a small marking range to achieve marking processing of a longer scale ruler 100. Moreover, the splicing fixture 110 changes the clamping object of the processing equipment, reducing the clamping difficulty of the sheet metal 130, and is especially suitable for processing ultra-thin scale rulers 100. At the same time, compared with the processing of scale 101 by inkjet printing, copying and other methods, the laser marking method has lower requirements for the flatness of the sheet metal 130 itself, and the obtained scale 101 has higher clarity, which improves the service life of the scale ruler 100 and is suitable for the inspection of aircraft fuel tanks.

[0058] Furthermore, a laser marking machine is used to directly replace traditional machining equipment to complete the cutting of the ruler 100, which can significantly improve the processing effect of the final shape of the ruler 100, facilitate the forming, and is especially suitable for cutting ultra-thin rulers 100. It can effectively improve the processing efficiency of ultra-thin rulers 100 and reduce the defect rate of ruler 100 processing.

[0059] In some alternative implementations, during the preparation step: the sheet metal 130 is glued and fixed to the splicing fixture 110, and the splicing fixture 110 fixes multiple sheets metal 130 at intervals.

[0060] Longer rulers 100 are usually made into tape measures for easy storage. Therefore, mounting holes 102 are opened at both ends of the ruler 100. An easy way to fix them is to use the mounting holes 102 pre-cut at both ends of the sheet metal 130 and use bolts or connecting screws 120 to directly tighten and fix the sheet metal 130 to the splicing fixture 110. However, for ultra-thin sheet metal 130, this fixing method is prone to displacement or even slight deformation of the sheet metal 130.

[0061] Therefore, the design of adhesive to fix the plate 130 of the scale 100 not only ensures the stability of the connection between the plate 130 and the splicing fixture 110, making it easy to pick up and reposition for multiple splicing, but also ensures that the plate 130 is subjected to uniform force and is not prone to deformation and damage. It is especially suitable for fixing ultra-thin plates 130, thereby solving the problem of difficult clamping.

[0062] Since the marking range is usually many times the width of the ruler 100, fixing multiple plates 130 on the splicing fixture 110 at the same time can realize the synchronous processing of multiple rulers 100, thereby effectively improving the processing efficiency of the ruler 100.

[0063] In some optional implementations, during the preparation step: multiple fixing holes are made on the worktable of the laser marking machine, and multiple limiting components are detachably installed into the fixing holes, with the spacing between adjacent fixing holes corresponding to the single marking distance of the laser marking machine.

[0064] The laser marking machine connects multiple required limiting components through the opening of fixing holes, which can minimize the modification of conventional equipment. Furthermore, the limiting components can be detached and installed, and can be removed when processing conventional parts, thus not affecting the conventional use of the laser marking machine and effectively controlling processing costs.

[0065] In addition, the single marking distance of the laser marking machine can be determined by fixing the spacing of the holes. The single marking distance can be a uniform value or a variable value.

[0066] In some alternative implementations, during the preparation step: the limiting member is a connecting screw 120, one end of which is threaded to the fixing hole, and the other end of which forms a shaft hole clearance fit with the positioning hole 111, and the fit clearance is less than or equal to the basic hole fit clearance of H7 / h6.

[0067] The connecting screw 120 is designed as a limiting component, forming a threaded connection with the fixing hole, which ensures the stability of the fixed position of the limiting component and improves the consistency of multiple installations of the splicing fixture 110.

[0068] The clearance fit between the hole and the positioning hole 111 facilitates the installation and disassembly of the splicing fixture 110, optimizes the splicing time of the splicing fixture 110, and thus improves production efficiency. Furthermore, it further limits the tolerance level of the hole-shaft clearance fit. Through the small clearance fit, the splicing accuracy of each movement of the splicing fixture 110 can be ensured, the continuity of the scale 101 marking is guaranteed, and the production quality of the scale 100 is improved.

[0069] In some optional implementations, during the preparation step: the positioning holes 111 are evenly spaced, and the distance between two adjacent positioning holes 111 is less than the marking range of the laser marking machine;

[0070] Furthermore, the marking process also includes: after marking any segment, if the value of scale 101 at the edge is discontinuous, the laser marking machine is operated to mark the value of scale 101 completely, or the value is reserved for marking adjacent segments.

[0071] The spacing between multiple positioning holes 111 is kept consistent, which simplifies the number of limiting components used. That is, only two fixed-position limiting components can be used to cooperate with all positioning holes 111 in turn, thereby completing the fixing and position change of the splicing fixture 110. It also facilitates the standardization of the single marking distance of the laser marking machine and improves the orderliness and regularity of the processing technology.

[0072] The spacing of the positioning holes 111 is smaller than the marking range, meaning that the single marking distance implemented by the laser marking machine has redundant distances on both sides. This allows for targeted processing of the values ​​of the scale 101 at the edge of the break, ensuring the integrity of the values ​​of the scale 101 and effectively reducing the adverse effects of the gaps in the splicing markings on the marking quality of the scale 101.

[0073] In some alternative implementations, during the marking step, when marking the scale 101 on the sheet 130 in any segment, the outline of the scale 100 is delineated.

[0074] The equipment parameters for marking scale 101 can be used to simultaneously trace the outline of the corresponding segment of scale 100 while marking scale 101. This not only facilitates tracking during subsequent cutting of scale 100, but also serves as a reference to promptly check for any misalignment or displacement of the marking position of scale 101.

[0075] In some alternative implementations, in the finishing step: the scale 100 is first polished with sandpaper of 600 grit or higher, and then the scale 100 is polished a second time with sandpaper of 1000 grit or higher.

[0076] Because the outer edge of the ruler 100 is serrated after being cut and shaped, it is easy to cut your hand. In addition, the ruler 100 is usually rolled into a tape measure. If the roughness of the outer edge of the ruler 100 is too large, it is easy for the inside of the tape measure to rub against each other or even come into contact, which is not conducive to the unfolding of the tape measure. This is especially obvious for the ruler 100 with a smaller thickness.

[0077] Therefore, by designing the sandpaper grit and secondary polishing process, the safety and practicality of the ultra-thin ruler 100 are effectively improved. Processing verification shows that it has a good polishing effect on the ultra-thin ruler 100 with a thickness of 0.2mm.

[0078] In some alternative embodiments, sheet 130 is a thin metal sheet, and the finishing process further includes: rolling the polished ruler 100 into shape to obtain a measuring tape.

[0079] The measurement of fuel level in aircraft fuel tanks usually requires a relatively long scale 100. The processing method is suitable for scales 100 made of various materials. The choice of processing a metal scale 100 makes it easy to roll the scale 100 into a tape measure structure, which is convenient to handle and carry, and facilitates measurement work.

[0080] In some alternative implementations, the thickness of the sheet 130 is less than or equal to 0.2 mm, and the marking step is performed first, followed by the cutting step.

[0081] For the relatively thin ruler 100, the scale 101 is marked first, and then the outer shape of the ruler 100 is cut, which can effectively avoid serious deformation of the ruler 100.

[0082] In some optional implementations, in the marking step: the operating parameters of the laser marking machine are set as follows: marking speed is 1000 mm / s, frequency is 30 kHz, power is 25%, and the number of markings is set to 1.

[0083] In the cutting process: the working parameters of the laser marking machine are set as follows: marking speed is 1000mm / s, frequency is 40KHZ, power is 75%, and the number of markings is set to 25.

[0084] For sheet material 130 with a thickness of 0.2mm, specific working parameters and number of markings were selected for marking and cutting. After simulation test verification, it has good processing effect and can effectively guarantee the processing quality of scale 100 at this thickness.

[0085] In some alternative implementations, the scale 100 has a thickness of less than or equal to 0.2 mm, a length of greater than or equal to 500 mm, a width of less than or equal to 100 mm, and the length of the scale 101 is greater than or equal to 100 mm.

[0086] Based on the convenience of production and processing and the requirements of specific working conditions, certain selections and combinations were made from various optional implementation methods, such as... Figure 1 As shown, the pre-processed ultra-thin ruler 100 has a thickness of 0.2mm and a length of 650mm. The scale 101 has a length of 500mm and a width of 30mm. The processing equipment used is a YSP-F20 laser marking machine with a marking area of ​​150mm*150mm. The specific processing steps are as follows:

[0087] First, proceed with the preparation steps:

[0088] S1.1: Based on the design dimensions of the scale 100, select a steel plate 130 with a thickness of 0.2mm, a length of approximately 700mm, and a width of approximately 40mm. Also, select an appropriate length of splicing fixture 110 based on the length of the plate 130. For example... Figure 2 and Figure 3 As shown, the length of the splicing fixture 110 is 800mm, and the shape of the splicing fixture 110 is a cuboid structure that is easy to process. In order to simultaneously process the three scale rulers 100, the width of the splicing fixture 110 is designed to be 140mm. In the middle area of ​​the splicing fixture 110, seven evenly spaced positioning holes 111 are opened along the length direction, and the distance between two adjacent positioning holes 111 is 100mm.

[0089] S1.2: Place the splicing fixture 110 flat, stick double-sided tape on the upper surface of the splicing fixture 110, and stick three selected boards 130 to the upper surface of the splicing fixture 110 with double-sided tape. The three boards 130 are parallel to each other and evenly spaced. Ensure the flatness of the boards 130 when sticking them.

[0090] S1.3: Select an appropriate single-stroke marking distance for the laser marking machine. Based on the spacing of the positioning holes 111, the single-stroke marking distance along the length of the sheet metal 130 is uniformly determined to be 100mm. Correspondingly, two fixing holes with a spacing of 100mm are custom-made on the worktable of the laser marking machine. The fixing holes are connected to limit components, and the limit components are selected by connecting screws 120. Figure 4As shown, the connecting screw 120 is divided into an upper section and a lower section. The thread of the lower section is adapted to the fixing hole, and the diameter of the upper section is adapted to the positioning hole 111. The connecting screw 120, the positioning hole 111, and the fixing hole have a basic hole fit clearance of H7 / h6. Specifically, H7 represents the tolerance zone designation of the positioning hole 111 and the fixing hole, while h6 represents the tolerance zone designation of the connecting screw 120, thereby achieving a small clearance fit and effectively ensuring the marking accuracy of the splicing area.

[0091] S1.4: Insert the connecting screws 120 into the two fixing holes respectively. The height of the two connecting screws 120 protruding from the worktable surface will be lower than the thickness of the splicing fixture 110, so that when the connecting screws 120 and the positioning holes 111 are engaged, they will avoid abutting against the sheet metal 130 and will also avoid occupying the placement area of ​​the sheet metal 130.

[0092] Then proceed with the labeling process:

[0093] S2.1: Since the single marking distance is uniformly set to 100mm, the processing of a 600mm scale ruler 100 requires 6 times. The corresponding splicing fixture 110 is divided into 6 segments. From the first end to the last end of the splicing fixture 110, it is divided into the first segment, the second segment, ..., the sixth segment. Each pair of adjacent positioning holes 111 corresponds to one segment.

[0094] S2.2: As Figure 5 As shown, first align and assemble the two positioning holes 111 at the beginning of the splicing fixture 110 with the connecting screws 120 so that the splicing fixture 110 is stably fixed on the worktable of the laser marking machine, and the first section of the splicing fixture 110 is just within the marking range of the laser marking machine.

[0095] S2.3: Set the laser marking machine to a marking speed of 1000mm / s, a frequency of 30KHZ, a power of 25%, and a marking count of 1. Adjust the focal length of the laser marking machine according to the overall thickness of the splicing fixture 110 and the sheet 130 to ensure the expected marking ratio. Mark the scale 101 and delineate the outline of the ruler 100 on the three sheets 130 within the first segment. At this time, since the area of ​​the sheet 130 within the first segment is just outside the scale 101 range, the scale 101 is not marked. Only the outline of the ruler 100 is delineated on the three sheets 130.

[0096] S2.4: After the first segment is processed, remove the splicing fixture 110 and adjust the fit between the positioning holes 111 and the connecting screws 120 at different positions. To conform to marking conventions, the six segments of the splicing fixture 110 will be marked sequentially according to their arrangement. Figure 6As shown, based on the two positioning holes 111 selected at the beginning in the previous step, the distance of only one positioning hole 111 is moved to determine the two positioning holes 111 selected this time. After being assembled with the connecting screws 120, the second segment of the splicing fixture 110 is placed within the marking range of the laser marking machine, and the scale 101 is marked on the three plates 130 in the second segment, and the outline of the scale ruler 100 is engraved.

[0097] S2.5: When marking the second segment with scale 101, if there is a break in the value of scale 101 at the end edge of the second segment, the laser marking machine will be operated to mark the value slightly beyond the set single marking distance to complete the marking.

[0098] S2.6: As Figures 7-10 As shown, based on steps S2.4 and S2.5, the marking of the next four segments is completed in sequence. When processing the sixth segment, if the area to be marked exceeds the single marking distance, the splicing fixture can be rotated 180 degrees and re-fixed to expand the marking range of the sixth segment. Finally, the complete outline of the three scales 100 and the scale 101 inside them can be obtained. At this time, the sixth segment of the splicing fixture 110 is within the marking range of the laser marking machine.

[0099] Next, proceed with the cutting step:

[0100] S3.1: Set the laser marking machine to a marking speed of 1000mm / s, a frequency of 40KHZ, a power of 75%, and a marking count of 25. For the sixth segment of the sheet 130, mark multiple times along the engraved outline to achieve the effect of penetrating and cutting, and complete the cutting work of the three sheets 130 in the current segment.

[0101] S3.2: By adjusting the engagement of the positioning holes 111 and the connecting screws 120 at different positions, the fifth segment, the fourth segment, ..., the first segment of the splicing fixture 110 can be moved sequentially to the marking range until all cutting work of the three plates 130 is completed.

[0102] Finally, proceed with the final product step:

[0103] S4.1: Remove the glue from the three cut boards 130 together with the splicing fixture 110. First, soak them in banana oil for 2-3 minutes, then peel off the excess double-sided tape and remove the cut ruler 100. During the removal process, the force and contact area must be strictly controlled to avoid tearing the thin ruler.

[0104] S4.2: Clean the removed ruler 100 with solvent gasoline at least twice, and then blow dry or air dry it.

[0105] S4.3: The ruler 100 is finished by the fitter's grinding method. First, use ≥600 grit sandpaper to polish along the outer contour of the ruler 100 clockwise or counterclockwise. Then, use ≥1000 grit sandpaper to polish the outer contour of the ruler 100 a second time in the same direction. The force must be strictly controlled during the polishing process to avoid tearing the thin ruler.

[0106] S4.4: Roll the polished ruler 100 into shape and process it to obtain a measuring tape.

[0107] This invention provides a method for processing a scale ruler 100, which can produce an ultra-thin, long scale ruler 100 with clear graduations 101, specifically for the use of aircraft fuel tanks to detect fuel level. After being rolled into shape, it can effectively save space. With a suitable set of sliding wheels, the resulting detection device is lightweight and compact, making it easy to load and carry. The graduations 101 are marked and cut simultaneously using a laser marking machine, which not only improves the quality of the scale ruler 100 processing but also increases processing efficiency. Combined with the designed splicing fixture 110, it effectively solves the problems of difficult clamping of the ultra-thin scale ruler 100 and high requirements for the processing range of the equipment.

[0108] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0109] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0110] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0111] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

Claims

1. A method for manufacturing a ruler, characterized in that, Includes the following steps: Preparation steps: Select the scale plate (130) and make a splicing fixture (110) for placing the plate (130). Make multiple positioning holes (111) at intervals along the length direction of the splicing fixture (110), and the distance between adjacent positioning holes (111) is less than or equal to the marking range of the laser marking machine. Fix the plate (130) to the splicing fixture (110). The worktable of the laser marking machine is connected with multiple limiting components. The multiple limiting components are used to adapt to multiple positioning holes (111) so that the splicing fixture (110) can be detachably fixed to the worktable. The multiple limiting components cooperate with the positioning holes (111) at different positions to change the relative position of the splicing fixture (110) and the worktable. Marking steps: Select the appropriate positioning hole (111) and cooperate with the limiting part to fix a certain segment of the splicing fixture (110) within the marking range of the laser marking machine, set the working parameters and marking times of the laser marking machine, and mark the scale (101) on the plate material (130) in the current segment. Adjust the positioning holes (111) at different positions to cooperate with the limiting parts so that the other segment of the splicing fixture (110) is fixed within the marking range of the laser marking machine and the scale (101) marking of the plate material (130) in the current segment is completed; Adjust the positioning holes (111) at different positions to match the limiting parts multiple times until the marking work of the sheet metal (130) in all sections of the splicing fixture (110) is completed; Cutting steps: Adjust the working parameters of the laser marking machine and increase the number of markings so that the laser marking machine can perform shape cutting on the sheet material (130) in the current segment; Adjust the positioning holes (111) at different positions to match the limiting parts multiple times until the sheet metal (130) in all sections of the splicing fixture (110) is cut to obtain the final shape of the ruler. Finished product steps: Remove glue from the cut plate (130) and the splicing fixture (110), and polish the separated ruler to complete the processing.

2. The method for processing the scale according to claim 1, characterized in that, In the preparation step: the sheet material (130) is glued and fixed to the splicing fixture (110), and the splicing fixture (110) fixes multiple sheets of sheet material (130) at intervals.

3. The method for processing the scale according to claim 1, characterized in that, In the preparation step: multiple fixing holes are made on the worktable of the laser marking machine, and multiple limiting components are detachably installed into the fixing holes.

4. The method for processing the scale according to claim 3, characterized in that, In the preparation step: the limiting member is a connecting screw (120), one end of which is threaded to the fixing hole, and the other end of which forms a shaft hole clearance fit with the positioning hole (111), and the fit clearance is less than or equal to the basic hole fit clearance of H7 / h6.

5. The method for processing the scale according to claim 1, characterized in that, In the preparation step: the positioning holes (111) are evenly spaced, and the distance between two adjacent positioning holes (111) is less than the marking range of the laser marking machine; Furthermore, the marking process also includes: after marking any segment, if a break occurs in the scale (101) value at the edge, the laser marking machine is operated to mark the scale (101) value completely, or the mark is reserved for marking adjacent segments.

6. The method for processing the scale according to claim 1, characterized in that, In the marking step, when marking the scale (101) on the sheet (130) in any segment, the outline of the scale is delineated.

7. The method for processing the scale according to claim 1, characterized in that, In the finished product step: first, the ruler is polished with sandpaper of 600 grit or higher, and then the ruler is polished a second time with sandpaper of 1000 grit or higher.

8. The method for processing the scale according to claim 1, characterized in that, The sheet material (130) is a thin metal sheet, and the finished product step further includes: rolling the polished ruler into shape and processing it to obtain a measuring tape.

9. The method for processing the scale according to claim 1, characterized in that, The thickness of the sheet material (130) is less than or equal to 0.2mm. First, the marking step is performed, and then the cutting step is performed.

10. The method for processing the scale according to claim 9, characterized in that, In the labeling step: the working parameters of the laser labeling machine are set as follows: the labeling speed is 1000mm / s, the frequency is 30KHZ, the power is 25%, and the number of labels is set to 1. In the cutting step, the operating parameters of the laser marking machine are set as follows: marking speed is 1000 mm / s, frequency is 40 kHz, power is 75%, and the number of markings is set to 25.

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