An adaptive buzzer-type elastic scribing device and scribing method

Abstract

The present application discloses an adaptive buzzer-type elastic scribing device and a scribing method, which relate to the field of box body forming, and include an outer sleeve, an inner sleeve, a first spring, a stopper, a scribing needle, and a profiling probe; the inner sleeve is inserted into the outer sleeve, the stopper is connected to the outer wall of the inner sleeve, the spring is sleeved outside the inner sleeve, one end of the spring abuts against the stopper, and the other end abuts against the inner wall of the outer sleeve; the profiling probe is provided with a through hole for the scribing needle to pass through, the scribing needle is slidably connected to the profiling probe, the profiling probe is threadedly connected with a third locking screw, the end of the third locking screw extends into the through hole, and the end of the profiling probe is provided with a plurality of ball bearings; the scribing needle is connected to the inner sleeve through a connecting structure; the inner sleeve and the scribing needle are provided with a buzzer device, which is used to generate a buzzer sound when the tip of the scribing needle touches the surface of the metal product. The problem of scribing the deviation of the overall box bottom profile in spinning forming is solved.

Description

Technical Field

[0001] The present application relates to the technical field of bottom forming of boxes, in particular to an adaptive buzzer-type elastic scribing device and a scribing method. Background Art

[0002] The integrally formed box bottom has the characteristics of short manufacturing cycle and high reliability, and is the future development direction of box bottom processing. The numerical control machining of the spin-formed integral box bottom is an important process to ensure the functional dimensions of the product, and the scribing method is an effective means to verify the numerical control program and transfer the reference. Affected by the forming process, the integral box bottom has a large deformation amount, which is often reflected in large deviations in longitude, latitude, and the straightness of the generatrix. The existing scribing methods mostly use conventional scribing needles to engrave thin lines with a certain depth on the product surface to verify the numerical control program. However, there are certain errors between the actual product and the theoretical program. Without compensation, the scribing of the scribing needle is affected by the error between the product theory and the actual situation, resulting in scribing failure, inconsistent scribing depth, or even breakage of the scribing needle. The current solutions mostly involve multiple scribing in sub-regions, with low efficiency and no fundamental solution.

[0003] At present, the scribing method is an important method for verifying the numerical control program and transferring the reference in the numerical control machining of the spin-formed integral box bottom. In view of the problem of large deviations in the product surface shape affected by its process, there are two existing solutions: 1. The traditional scribing method, with multiple adjustments in sub-regions; 2. The scribing method based on error compensation.

[0004] Disadvantages of the prior art one;

[0005] During traditional scribing, a conventional scribing needle is generally clamped at the position of the spindle tool, accurately aligned, ensuring that the scratch depth is 0.1 - 0.2 mm, then the numerical control program is run (the spindle speed is set to zero), and finally the scratch is measured. For the above errors, the traditional method has no good solution and can only make multiple adjustments and multiple scribings in sub-regions when necessary to reduce the error amount of a single program. This adjustment method has the following disadvantages:

[0006] 1. Difficult tool alignment. Accurate tool alignment is required before program scribing. If the tool alignment is inaccurate, the scribing needle may not contact the workpiece or the scratch may be too deep, affecting subsequent measurement. And the tip of the scribing needle is a sharp point, making measurement difficult during tool alignment.

[0007] 2. Low scribing efficiency. Since the product often has a jump of 2 - 3 mm on the contour or the generatrix, and the conventional scribing needle obviously cannot withstand this scribing depth error. Multiple regional adjustments require the process personnel to prepare multiple numerical control programs according to the actual situation, and the operator needs to run the scribing program multiple times, often with low efficiency.

[0008] 3. Low reliability. Once the conventional scribing needle is clamped and fixed on the spindle, its tool length is a fixed value, which determines that the scribing depth varies with the product error. In the worst case, the scribing needle does not touch the product, or the scribing is too deep or the scribing needle breaks, failing to meet the product usage requirements.

[0009] Disadvantages of the second prior art:

[0010] The scribing method based on error compensation can solve the problem of the error between the actual size of the product and the theoretical numerical control program. Usually, it is necessary to measure the actual state of the product, combine the measured point data with the theoretical numerical control program through an algorithm to achieve the purpose of compensating the theoretical numerical control program. In this way, using the conventional scribing needle to allow the compensated numerical control program solves the error problem and can also verify the correctness of the program.

[0011] This method has the following disadvantages:

[0012] 1. The operation process is complex. The premise of error compensation is the accurate measurement of the actual state of the product and the high efficiency of the compensation algorithm. The requirements for both operators and technicians are relatively high, and the operation process is cumbersome and inefficient.

[0013] 2. The calculation of the surface compensation process is difficult. The surface contour is a three-dimensional spatial structure. Due to the difference between the actual contour and the theoretical contour of the product surface, the spacing and spatial position of the points taken during point compensation affect the compensation result. Moreover, as the number of points taken increases, the compensation algorithm increases geometrically, making the calculation method difficult and the difficulty relatively large.

[0014] 3. High cost. The measurement of the actual state of the product is affected by the complexity of the product and often requires special measurement equipment, and the universality for products with strong singularity is not high. Secondly, the effect of error compensation requires the high-precision support of the measurement equipment, and such equipment often has a high cost and is not easy to promote. Summary of the Invention

[0015] The technical problem solved by the present invention is: overcoming the deficiencies of the prior art, providing an adaptive buzzer-type elastic scribing device and a scribing method, which solve the problem of scribing the surface deviation of the integral bottom of the spinning forming.

[0016] The inventive concept of the present invention is as follows: By providing a conforming probe at the front end of the elastic scribing device, the end face balls in the conforming probe are in contact with the surface of the overall box bottom, converting the error between the actual state of the product and the theoretical program into the compression amount of the spring to achieve axial adjustment; and a precise scribing method based on the elastic scribing device is set, including: a scribing depth confirmation method and a spring compression amount confirmation method. The following technical problems are solved: Problem: For the scribing problem of the profile deviation of the overall box bottom formed by spinning, the traditional scribing needle is a cylindrical steel needle, which does not have adjustability and cannot fundamentally solve this problem. Often, there are problems such as inconsistent scribing depths, low scribing efficiency, high program compensation costs, and cumbersome operations, which do not meet the scribing requirements for the numerical control machining of the overall box bottom.

[0017] The technical solution of the present invention is:

[0018] An adaptive buzzer-type elastic scribing device, comprising an outer sleeve, an inner sleeve, a first spring, a stopper, a scribing needle, and a conforming probe;

[0019] The inner sleeve is inserted into the outer sleeve, the stopper is connected to the outer wall of the inner sleeve, the spring is sleeved outside the inner sleeve, one end of the spring abuts against the stopper, and the other end abuts against the inner wall of the outer sleeve;

[0020] The conforming probe is provided with a through hole for the scribing needle to pass through, the scribing needle is slidably connected to the conforming probe, the conforming probe is threadedly connected with a third locking screw, the end of the third locking screw extends into the through hole, and the end of the conforming probe is provided with a plurality of balls;

[0021] The scribing needle is connected to the inner sleeve through a connecting structure;

[0022] The inner sleeve and the scribing needle are provided with a buzzer device for making a buzzing sound when the tip of the scribing needle contacts the surface of the metal product.

[0023] The buzzer device includes a power source, a buzzer, a light-emitting diode, a first wire, and a second wire. A through hole is opened in the inner sleeve, the buzzer and the power source are fixed in the through hole, the positive pole of the power source is connected to the negative pole of the buzzer through the first wire, the positive pole of the buzzer is connected to the negative pole of the diode, the positive pole of the diode is electrically connected to the scribing needle, and the scribing needle is connected to the negative pole of the button battery through the second wire.

[0024] A compression spring, a first locking screw, and a contact spring are further arranged in the inner sleeve. The first locking screw is inserted into one end of the inner sleeve and is threadedly connected to the inner sleeve. One end of the compression spring presses against the negative pole of the button battery, and the other end abuts against the first locking screw. One end of the contact spring abuts against the positive pole of the diode, and the other end abuts against the end of the scribing needle inserted into the inner sleeve.

[0025] The connecting structure includes a second locking nut and a tapered sleeve. The tapered sleeve is sleeved inside the second locking nut. The second locking nut is sleeved at one end of the inner sleeve and is threadedly connected to the inner sleeve. Along the direction away from the outer sleeve, the outer diameter of the tapered sleeve gradually increases. The end of the inner sleeve is clamped between the inner wall of the second locking nut and the tapered outer wall of the tapered sleeve, and the end of the inner sleeve is in the shape of a conical surface that fits with the outer conical surface of the tapered sleeve. A necking portion is provided at one end of the second locking nut away from the outer sleeve, and the inner diameter of the necking portion is smaller than the outer diameter of the larger end of the tapered sleeve, realizing the axial limit of the tapered sleeve. Multiple pressing grooves are provided at the larger end of the outer diameter of the tapered sleeve.

[0026] A linear bearing is provided inside the outer sleeve. One end of the outer sleeve is threadedly connected with a first locking nut. One end of the linear bearing abuts against the inner wall of the outer sleeve, and the other end abuts against the first locking nut. The inner sleeve is inserted into the linear bearing.

[0027] The rear end of the outer sleeve is made into a hole with a clearance fit with the inner sleeve to provide support rigidity.

[0028] Scale lines are provided on the inner sleeve.

[0029] A scribing method using any one of the above-mentioned self-adaptive buzzer-type elastic scribing devices includes:

[0030] Determine the scribing depth by adjusting the relative position of the scriber and the profiling probe.

[0031] Determine the compression amount of the first spring and select the first spring.

[0032] Connect the outer sleeve, the first spring, and the inner sleeve, and connect the scriber to the inner sleeve through the connecting structure.

[0033] The determination of the scribing depth includes:

[0034] Pass the scriber through the profiling probe and place them vertically on the horizontal workbench together.

[0035] Use a feeler gauge or a U-shaped calibration block with the same thickness as the scribing depth, so that the lowest point of the end face ball of the profiling probe contacts the upper surface of the feeler gauge (or both sides of the U-shaped calibration block), and the tip of the scriber closely adheres to the workbench (or the bottom surface of the U-shaped calibration block), and finally tighten the third locking screw.

[0036] The selection of the first spring includes:

[0037] Determine the maximum compression amount X1 of the first spring.

[0038] Determine the width of the limiter. The width of the limiter S0 = L2 - L1 - X0, where L2 is the length of the internal space of the outer sleeve, L1 is the length of the stepped circle of the outer sleeve, and the free length of the first spring is X0.

[0039] The maximum compression length of the first spring is X max , and the maximum compression X1 is 5-10% of the maximum spring compression X1.

[0040] The maximum compression X1 of the first spring = Z max -Z min , the circumferential line wheel degree of the product is theoretically a standard circle, but there is a large runout in reality, and the maximum Z-direction value is Z max , the minimum Z-direction value is Z min , and the Z-direction is the radial direction of the product.

[0041] In summary, the present application at least includes the following beneficial technical effects:

[0042] The scribing method in the numerical control machining of the integral box bottom by spinning is an important means to verify the machining program and transfer the upstream and downstream references. Affected by multiple factors such as the spinning process, product structure characteristics, and machining stress release, there are often large theoretical deviations in its profile. The traditional scribing method cannot adapt to the deviation to ensure the scribing quality and efficiency. This patent provides a precise scribing method for the numerical control machining of the integral box bottom by spinning. Based on the adaptive elastic scribing device, a conforming probe is used to sense the error and feedback it to the spring compression amount, thereby generating an axial adjustment of the scriber. According to the material and structure characteristics of the integral box bottom, a method for determining the adjustment of the spring compression amount is determined, which can greatly improve the scribing quality and efficiency of the integral box bottom. Description of the Drawings

[0043] Figure 1a is a schematic diagram of the overall structure of an adaptive buzzer-type elastic scribing device in an embodiment of the present application, Figure 1b is a sectional view of the elastic scribing device;

[0044] Figure 2 is a perspective view of an adaptive buzzer-type elastic scribing device in an embodiment of the present application;

[0045] Figure 3 is the conforming probe structure in an embodiment of the present application;

[0046] Figure 4 [[ID=4o]]is a schematic diagram of the method for determining the scribing depth in an embodiment of the present application;

[0047] Figure 5 is a schematic diagram of the buzzer circuit in an embodiment of the present application;

[0048] Figure 6 a and b are respectively schematic diagrams of the line wheel profile and surface profile in an embodiment of the present application;

[0049] Figure 7 is the determination of the working stroke in an embodiment of the present application.

[0050] Description of reference numerals: 1. Outer sleeve; 2. First locking screw; 3. First spring; 4. Power supply; 5. Inner sleeve; 6. Limiter; 7. Linear bearing; 8. First wire; 9. First locking nut; 10. Buzzer; 11. Diode; 12. Scratching needle; 14. Contour probe; 15. Ball; 16. Second locking screw; 17. Third locking screw; 18. Compression spring; 19. Contact spring; 20. Second locking nut; 21. Conical sleeve. Detailed implementation manners

[0051] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0052] The embodiment of the present application discloses an adaptive buzzer-type elastic scribing device and a scribing method, and the main technologies are as follows:

[0053] Main technology 1: Restricted by its integral inherent structure, the traditional scratching needle cannot be axially adjusted. In response to this, the above scribing device is designed. As Figure 1a 、 Figure 1b and Figure 2 shown, the scribing device includes an outer sleeve 1, a first spring 3, an inner sleeve 5, a limiter 6, a linear bearing 7, a first locking nut 9, a scratching needle 12, a contour probe 14, a nylon plastic ball 15, a second locking screw 16, a third locking screw 17, a second locking nut 20, a conical sleeve 21, and a compression groove.

[0054] One end of the outer sleeve 1 is provided with a hollow chamber. Along one end of the hollow chamber inward, the hollow chamber is provided with a first stepped surface and a second stepped surface with gradually decreasing diameters. The front end of the outer sleeve 1 is sleeved with a linear bearing 7, and the inner sleeve 5 is installed in the linear bearing 7. One end of the linear bearing 7 abuts against the first stepped surface. The outer side of one end of the outer sleeve 1 is threadedly connected with a first locking nut 9, and one end of the first locking nut 9 presses the linear bearing 7 in the outer sleeve 1. The inner sleeve 5 passes through the first locking nut 9 and the linear bearing 7 and is inserted into the outer sleeve 1. There is a clearance fit between the linear bearings 7, and they can linearly slide axially. The outer circumference of the inner sleeve 5 is connected with a limiter 6, and both ends of the limiter 6 sliding in the hollow chamber are limited by the second stepped surface and the linear bearing 7 respectively. The first spring 3 is sleeved on the outer circumference of the inner sleeve 5, and the front end and the rear end of the first spring 3 act on one side of the limiter 6 and the second stepped surface of the outer sleeve 1 respectively. The integral axial adjustment of the inner sleeve 5 can be realized by using the elastic deformation of the first spring 3.

[0055] The conical sleeve 21 is sleeved inside the second locking nut 20. The second locking nut 20 is sleeved at one end of the inner sleeve 5 and is threadedly connected to the inner sleeve 5. Along the direction away from the outer sleeve 1, the outer diameter of the conical sleeve 21 gradually increases. The end of the inner sleeve 5 is clamped between the inner wall of the second locking nut 20 and the conical outer wall of the conical sleeve 21, and the end of the inner sleeve 5 is in the shape of a conical surface that fits the outer conical surface of the conical sleeve 21. The end of the second locking nut 20 away from the outer sleeve 1 is provided with a necking portion, and the inner diameter of the necking portion is smaller than the outer diameter of the larger end of the conical sleeve 21, realizing the axial limit of the conical sleeve 21. Multiple pressing grooves are provided at the larger end of the outer diameter of the conical sleeve 21. The profiling probe 14 is connected to the scriber 12, and the scriber 12 passes through the second locking nut 20 and the conical sleeve 21 and is inserted into the inner sleeve 5. When installing the scriber 12, the scriber 12 is passed through the second locking nut 20 and the conical sleeve 21 and inserted into the inner sleeve 5, and then the conical sleeve 21 is tightened. The conical surface at the end of the inner sleeve 5 gradually presses the conical sleeve 21, so that the part of the conical sleeve 21 provided with the pressing grooves gradually clamps the scriber 12, thus realizing the fixation of the scriber 12 and the inner sleeve 5.

[0056] At the same time, in order to ensure the rigidity and straightness of the inner sleeve 5, a hole with a clearance fit with the inner sleeve 5 is made at the rear end of the outer sleeve 1 to provide support rigidity. The axial degree of freedom of the inner sleeve 5 is restricted by the stopper 6 to ensure the mobility of the scriber 12. Moreover, by changing the length of the stopper 6, the initial compression amount of the first spring 3 can be adjusted.

[0057] The inner sleeve 5 is threadedly connected with a second locking screw 16, and the second locking screw 16 passes through the stopper 6 to fix the stopper 6 on the inner sleeve 5.

[0058] With such a design, this structure can realize the axial adjustment of the scriber 12. However, when there are errors between the product profile and the theoretical program, only axial adjustment can be performed, but it cannot sense the actual state of the product profile, resulting in its inability to ensure the consistency of the scribing depth. Based on the above analysis, on this basis, the structure design of the profiling probe 14 is added. As Figure 3As shown in the figure, in order to ensure that the profiling probe 14 can adapt to products with different curved surfaces, a structure composed of four end face balls 15 is designed on the end face of the profiling probe 14 perpendicular to the axis of the scriber 12. The 4 end face balls 15 are distributed circumferentially around the scriber 12. The end face balls 15 are made of nylon plastic, which can protect the surface of the product from scratches and provide insulation, and can also achieve universal sliding, thus ensuring the smoothness of the scriber 12 during the programmed scribing process. There is a circular hole at the center of the profiling probe 14, which is a through hole for the scriber 12. The profiling probe 14 is threadedly connected with a third locking screw 17, and the end of the third locking screw 17 extends into the through hole. The integral structure of the profiling probe 14 belongs to a detachable device, and it can be connected to the inner sleeve 5 through the second locking nut 20. Its principle is to use the end face balls 15 to fit with the surface of the product, so as to sense the error between the actual profile of the product and the theoretical program, and feedback it to the first spring 3 through the inner sleeve 5, converting it into the telescopic amount of the first spring 3. And the scribing depth can be adjusted by adjusting the height difference between the end face balls 15 and the tip of the scriber 12. Since it is an integral structure with the scriber 12, the scribing depth can be ensured to be consistent all the time, which realizes the effective control of the scribing depth.

[0059] Through the design of the total system and the sub-system, the profiling adaptive buzzer-type elastic scribing device can realize the axial adjustment of the scriber 12, sense the error by using the profiling probe 14, and compensate the error by using the structure of the first spring 3. Compared with the traditional scriber 12, it can fundamentally solve the above problems.

[0060] Main technology two: The overall bottom of the spinning forming has high requirements for the scribing quality. The integral structure of the profiling probe 14 in the profiling adaptive buzzer-type elastic scribing device belongs to a detachable device, and its relative position relationship with the scriber 12 determines the depth of the scriber 12. Since the front end of the scriber 12 is in a pointed shape and the end face balls 15 are in a multi-point structure, it is difficult to measure the relative height difference between the two, and the measurement accuracy is not high. Without using complex measuring equipment, this patent provides a special method for determining the scribing depth of the profiling adaptive buzzer-type elastic scribing device. As Figure 4 shown, this method is roughly divided into three processes. First, pass the scriber 12 through the profiling probe 14 and place them vertically on the horizontal workbench together. The workbench needs to have good flatness for detecting the relative position between the scriber 12 and the profiling probe 14. Secondly, use a feeler gauge or a U-shaped calibration block with the same thickness as the scribing depth, so that the lowest point of the end face balls 15 of the profiling probe 14 contacts the upper surface of the feeler gauge (the two sides of the U-shaped calibration block), and the tip of the scriber 12 closely adheres to the workbench (the bottom surface of the U-shaped calibration block). Finally, tighten the third locking screw 17, install the scriber 12 into the inner sleeve 5 and fix it through the second locking nut 20. In this way, the height difference between the tip of the scriber and the end face ball is the clearance , that is, the scribing depth of this scriber 12 is also 。By adjusting the scoring depth through this method, it is efficient and convenient, solving the problems of difficult adjustment operation and large errors through traditional measurement methods.

[0061] Main technology three: The traditional scriber 12 is restricted by its integral inherent structure and needs precise tool setting before use. There is a hidden danger of scratching the product during the tool setting process. In response to this, a contact buzzer 10 is designed in the adaptive elastic scriber 12 device. When the scribing tip contacts the surface of the metal product, a beeping sound occurs. As Figure 5 shown, the device includes a power supply 4, a buzzer 10, a light-emitting diode 11, a first wire 8. A through hole is provided in the inner sleeve 5. The buzzer 10 is fixed in the through hole. The power supply 4 is a button battery, and the button battery is located in the through hole. The positive electrode of the button battery is connected to the negative electrode of the buzzer 10 through the first wire 8. The positive electrode of the buzzer 10 is connected to the negative electrode of the diode 11. The positive electrode of the diode 11 is electrically connected to the scriber 12. The scriber 12 is connected to the negative electrode of the button battery through a second wire. A compression spring 18, a first locking screw 2 and a contact spring 19 are also provided in the inner sleeve 5. The compression spring 18 presses against the negative electrode of the button battery. The first locking screw 2 is inserted into one end of the inner sleeve 5 and is threadedly connected to the inner sleeve 5. The first locking screw 2 presses the compression spring 18 against the negative electrode of the button battery. Through the first locking screw 2 and the compression spring 18, the button battery is pressed and fixed in the inner sleeve 5. The contact spring 19 is also located in the through hole, and one end of the contact spring 19 abuts against the positive electrode of the diode 11 and the other end abuts against the end of the scriber 12 inserted into the inner sleeve 5. The contact spring 19 is in a compressed state. The setting of the contact spring 19 ensures that electrical connection can be formed with the diode 11 through the contact spring 19 under different insertion lengths of the scriber 12. Utilizing the conductivity of the workpiece, when the scribing tip contacts the surface of the workpiece, an electric current forms a loop, and sound and light prompts occur. The tool setting can be realized through the sound and light prompts and the machine tool coordinate position. Compared with the traditional scriber 12, the tool setting method is simple and convenient. With the double guarantee of the spring and the profiling probe 14, the above-mentioned scratching problem can be fundamentally solved.

[0062] Main technology four: Due to the structural design, the working stroke of the profiling adaptive buzzer-type elastic scribing device is highly correlated with the elastic characteristics. The first spring 3 has a limit compression amount due to its own material and structure. Once the limit compression amount of the first spring 3 is exceeded, the first spring 3 will produce irreversible deformation and lose its elasticity, resulting in the failure of the scriber 12. Therefore, this patent provides a method for determining the spring compression amount of the scribing device and an accurate scribing method for the deviation situation of the integrally formed bottom of the spinning.

[0063] As Figure 6 shown, affected by factors such as the error of the spinning forming tire fitting and stress deformation, the circumferential linearity (surface contour) of the product is theoretically a standard circle (spherical surface), but there is a large runout in reality. The maximum Z-direction value is Zmax , the minimum Z - value is Z min , the traditional scribing needle will inevitably lead to uneven scribing depth and even scribing needle breakage. Through the above analysis, if a profiling adaptive elastic scribing device is used, the maximum compression amount of the first spring should be X1 = Z max -Z min , which is the working stroke of the profiling adaptive elastic scribing device.

[0064] As Figure 7 shown, in order to ensure the effectiveness of the working stroke of the elastic scribing needle, corresponding scale lines are designed on the inner sleeve. The zero point of the scale area is the free state of the first spring, and the maximum value point of the scale line area is the maximum compression state of the first spring. Assume the free length of the first spring is X0. At this time, the width of the stopper S0 = L2 - L1 - X0, where L2 is the length of the internal space of the outer sleeve and L1 is the length of the stepped circle of the outer sleeve, then the length of the stopper in the free state of the first spring can be calculated, and the position on the front end face of the outer sleeve at this time is the initial zero position of the scale D; and assume the maximum compression length of the first spring is X max , with the length S of the stopper unchanged, moving back a maximum spring compression amount X1 from the zero position of the scale towards the front end. The maximum spring compression amount X1 is usually 5 - 10% of the maximum spring compression amount X1, ensuring that the first spring is within the range of elastic deformation. At this time, the position where the front end face of the outer sleeve is located is the maximum value of the scale, that is, D min = 0. In order to ensure that the profiling adaptive elastic scribing device does not exceed this working stroke, a light prompt is designed here. When the light is blocked, it means reaching the limit.

[0065] The essential principle of the profiling adaptive buzzer - type elastic scribing device is that the scribing needle acts on the product to generate a force. As the compression amount increases, the reaction force acting on the product also gradually increases. When this force reaches the critical state where scribing can be done, the scribing needle can scribe a scratch on the product. Different wire diameters and lengths of the first spring (K = F / X) are selected according to the hardness of the product material. Generally, the compression amount of the first spring is sufficient to cope with the error between the normal product and the theoretical program. To ensure the consistency between the elastic stroke range of the scribing needle and the Z - value range of the product, usually, the tool setting should be done when the product has the maximum Z - value Z max , at this time the spring compression amount X min just enables the scribing needle to scribe a scratch on the product, then it can ensure that the working stroke of the profiling adaptive buzzer - type elastic scribing device can maximize the envelope of the maximum error between the product and the theoretical program. And the critical acting force F t is caused by many factors such as the state of the scribing needle and the mechanical properties of the product material, and can be expressed as F t= δ(θ1, θ2), where θ1 is the characteristic of the scriber and θ2 is the characteristic of the product. This value usually cannot be accurately calculated and can only be obtained by experimental methods. That is, on the product specimen of the corresponding material, the operator manually uses this device to scribe lines until a scratch of a certain depth can be made, and record the scale position D at this time t , after loosening and replacing the length of the first spring, the working stroke D0 of the scriber = L2 - L1 - X max , at this time, the critical acting force F is satisfied t and scribing can be carried out

[0066] Although the present invention is disclosed above in preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be subject to the scope defined by the claims of the present invention

Claims

1. An adaptive buzzer-type elastic scribing device, characterized in that: It includes an outer sleeve (1), an inner sleeve (5), a first spring (3), a stopper (6), a scriber (12), and a profiling probe (14); The inner sleeve (5) is inserted into the outer sleeve (1). The stopper (6) is connected to the outer wall of the inner sleeve (5). The first spring (3) is sleeved outside the inner sleeve (5). One end of the first spring (3) abuts against the stopper (6), and the other end abuts against the inner wall of the outer sleeve (1); The profiling probe (14) is provided with a through hole for the scriber (12) to pass through. The scriber (12) is slidably connected to the profiling probe (14). The profiling probe (14) is threadedly connected with a third locking screw (17). The end of the third locking screw (17) extends into the through hole. A plurality of balls (15) are provided at the end of the profiling probe (14); The scriber (12) is connected to the inner sleeve (5) through a connecting structure; The inner sleeve (5) and the scriber (12) are provided with a beeping device for making a beeping sound when the tip of the scriber (12) touches the surface of the metal product. When using the adaptive beeping elastic scribing device: The scribing depth is determined by adjusting the relative position between the scriber (12) and the profiling probe (14); Determine the maximum compression amount X1 of the first spring (3) and select the first spring (3); Connect the outer sleeve (1), the first spring (3), and the inner sleeve (5), and connect the scriber (12) to the inner sleeve (5) through a connecting structure. The determination of the scribing depth includes: Pass the scriber (12) through the profiling probe (14) and place them vertically on the horizontal workbench together; Use a feeler gauge or a U-shaped calibration block with the same thickness as the scribing depth, so that the lowest point of the end face ball (15) of the profiling probe (14) contacts the upper surface of the feeler gauge or both sides of the U-shaped calibration block, and the tip of the scriber (12) closely adheres to the workbench or the bottom surface of the U-shaped calibration block. Finally, tighten the third locking screw (17).

2. The adaptive buzzer-type elastic scribing device according to claim 1, characterized in that: The beeping device includes a power supply (4), a buzzer (10), a light-emitting diode (11), a first wire (8), and a second wire. A through hole is provided in the inner sleeve (5). The buzzer (10) and the power supply (4) are fixed in the through hole. The positive pole of the power supply (4) is connected to the negative pole of the buzzer (10) through the first wire (8). The positive pole of the buzzer (10) is connected to the negative pole of the diode (11). The positive pole of the diode (11) is electrically connected to the scriber (12). The scriber (12) is connected to the negative pole of the button battery through the second wire.

3. An adaptive buzzer-type elastic scribing device according to claim 2, characterized in that: A compression spring (18), a first locking screw (2), and a contact spring (19) are further provided inside the inner sleeve (5). One end of the first locking screw (2) is inserted into the inner sleeve (5) and is threadedly connected to the inner sleeve (5). One end of the compression spring (18) presses against the negative pole of the button battery, and the other end abuts against the first locking screw (2). One end of the contact spring (19) abuts against the positive pole of the diode (11), and the other end abuts against the end of the scriber (12) inserted into the inner sleeve (5).

4. An adaptive buzzer-type elastic scribing device according to claim 1, characterized in that: The connecting structure includes a second locking nut (20) and a tapered sleeve (21). The tapered sleeve (21) is sleeved inside the second locking nut (20). The second locking nut (20) is sleeved on one end of the inner sleeve (5) and is threadedly connected to the inner sleeve (5). Along the direction away from the outer sleeve (1), the outer diameter of the tapered sleeve (21) gradually increases. The end of the inner sleeve (5) is clamped between the inner wall of the second locking nut (20) and the tapered outer wall of the tapered sleeve (21), and the end of the inner sleeve (5) is in the shape of a conical surface that fits the outer conical surface of the tapered sleeve (21). One end of the second locking nut (20) away from the outer sleeve (1) is provided with a necking portion, and the inner diameter of the necking portion is smaller than the outer diameter of the larger end of the tapered sleeve (21), realizing the axial limit of the tapered sleeve (21). A plurality of pressing grooves are provided at the larger end of the outer diameter of the tapered sleeve (21).

5. An adaptive buzzer-type elastic scribing device according to claim 1, characterized in that: A linear bearing (7) is provided inside the outer sleeve (1). One end of the outer wall of the outer sleeve (1) is threadedly connected with a first locking nut (9). One end of the linear bearing (7) abuts against the inner wall of the outer sleeve (1), and the other end abuts against the first locking nut (9). The inner sleeve (5) is inserted into the linear bearing (7). The rear end of the outer sleeve (1) is made into a hole with a clearance fit with the inner sleeve (5) to provide support rigidity.

6. The adaptive buzzer-type elastic scribing device according to claim 1, wherein: Scales are provided on the inner sleeve (5).

7. An adaptive buzzer-type elastic scribing device according to claim 1, characterized in that, The selection of the first spring (3) includes: Determining the maximum compression amount X1 of the first spring (3); Determining the width of the stopper (6). The width S0 of the stopper (6) = L2 - L1 - X0, where L2 is the length of the internal space of the outer sleeve (1), L1 is the length of the stepped circle of the outer sleeve (1), and X0 is the free state length of the first spring (3); The maximum compression length of the first spring (3) is such that the maximum compression amount is 5 - 10% of the maximum spring compression amount.

8. An adaptive buzzer-type elastic scribing device according to claim 1, characterized in that: The maximum compression amount X1 of the first spring (3) = Z max -Z min , the maximum Z-direction value is Z max , the minimum Z-direction value is Z min , the Z-direction is the radial direction of the product.

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