Automatic wall thickness measuring method, processing method and system

Abstract

The invention relates to an automatic wall thickness measuring method, a machining method and a system. The automatic wall thickness measuring method comprises the steps that an ultrasonic measuring head is installed on a main shaft of a machine tool; pCDMIS NC software is started, a thickness measurement program is called, and the machine tool controls the ultrasonic measuring head to conduct touch measurement on a single point on the part and can conduct wall thickness measurement on the touch measurement point at the same time; the thickness measurement program comprises a point measurement program for 3D position touch measurement and a thickness measurement subprogram added into the point measurement program, the thickness measurement subprogram is a thickness measurement built-in program of the ultrasonic measuring head, and after touch measurement is completed, the ultrasonic measuring head returns to a touch measurement starting point. The on-machine ultrasonic measuring head and PCDMIS NC software are combined, the 3D position coordinates and the wall thickness are automatically measured, manual measurement is avoided, the measuring efficiency and the follow-up part machining efficiency are improved, manual participation is not needed in the measuring process, and the operation automation and safety are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of construction measurement, and in particular to an automatic wall thickness measurement method, and a processing method and system for reducing the weight of thin-walled parts. Background Art

[0002] When existing aerospace parts manufacturers carry out thinning processing of large quantities of cylindrical thin-walled parts, they first use manual thickness gauges to measure hundreds of wall thickness values ​​of each weight reduction grid after rough processing of the workpiece, and manually calculate the processing compensation value according to the wall thickness of each grid. This is inefficient and prone to errors, and the processing efficiency of the process can no longer meet the batch requirements. It is urgent to solve the problem of automatic and rapid measurement of the actual wall thickness before fine processing to prepare for automatic loading and unloading in the future. Summary of the invention

[0003] In order to solve the above technical problems, the purpose of the present invention is to provide an automatic wall thickness measurement method, which can combine an on-machine ultrasonic probe and PCDMIS NC software to realize automatic measurement of 3D position coordinates and wall thickness, avoid manual measurement, improve measurement efficiency and subsequent part processing efficiency, and the measurement process does not require manual participation, thereby improving operation automation and safety.

[0004] In order to solve the above technical problems, the present invention proposes the following technical solutions: The present application relates to an automatic wall thickness measurement method, comprising: Install the ultrasonic probe on the spindle of the machine tool; Start the PCDMIS NC software and call the thickness measurement program. The machine tool controls the ultrasonic probe to touch a single point on the part and can also measure the wall thickness of the touch point, so that the machine tool can simultaneously obtain the three-dimensional position coordinates and wall thickness value of the touch point; The thickness measurement program includes a measuring point program for 3D position touch measurement and a thickness measurement subprogram added to the measuring point program. The thickness measurement subprogram is a built-in program for thickness measurement of the ultrasonic probe. After the touch measurement is completed, the ultrasonic probe returns to the touch measurement starting point.

[0005] In some embodiments of the present application, a plurality of weight-reducing grids are formed on the side wall of the part to be weight-reduced, and a plurality of measuring points on each weight-reducing grid are measured, and the plurality of measuring points include a measuring point located at the center of the weight-reducing grid; the automatic wall thickness measurement method further includes: Import the digital model of the part into PCDMIS NC software, and write a program for the measurement points of each weight reduction grid in the same way as writing measurement vector points to measure the wall thickness value of each measurement point of each weight reduction grid; Determine whether the wall thickness value of the measuring point at the center of the weight reduction grid and the wall thickness values ​​of the remaining measuring points are within the specified limit. If so, the wall thickness value of the measuring point at the center of the weight reduction grid is used as the wall thickness value of the corresponding weight reduction grid. If not, an alarm is issued.

[0006] In some embodiments of the present application, the automatic wall thickness measurement method further includes a step of verifying the measured wall thickness value, specifically: The wall thickness values ​​measured at the several measuring points are compared with the wall thickness values ​​measured by a manual thickness gauge. If the deviation of the wall thickness values ​​measured at each corresponding measuring point is within the specified value, it means that the wall thickness value measurement meets the use requirements, otherwise, it cannot meet the use requirements.

[0007] Compared with the prior art, the automatic wall thickness measurement method involved in this application has the following advantages and beneficial effects: The measuring point program written in PCDMIS NC software can touch the position coordinates of a single point in three dimensions, and the ultrasonic probe can only measure the thickness in the Z direction. Therefore, by combining the implementation of the two, the thickness measurement subroutine of the ultrasonic probe is placed in the measuring point program, so that the wall thickness of the touch point can be measured while touching the three-dimensional position coordinate point, realizing wall thickness measurement in any direction, meeting the needs of automatic wall thickness measurement, improving the efficiency of subsequent part processing, reducing the intensity of manual wall thickness measurement, and facilitating the subsequent batch processing needs of parts.

[0008] The present application also relates to a processing method for reducing the weight of a thin-walled part, wherein the side wall of the thin-walled part to be reduced in weight has a plurality of weight-reducing slots, and the processing method comprises: S1: The machine tool calls a processing program for weight reduction processing of the thin-walled part; S2: Start the PCDMIS NC software and call the thickness measurement program. The machine tool controls the ultrasonic probe to touch the single point on the weight-reducing grid and can also measure the wall thickness, so that the machine tool can simultaneously obtain the three-dimensional position coordinates and wall thickness value of the touch point; The ultrasonic probe is installed on the main shaft of the machine tool. The thickness measurement program includes a measuring point program for 3D position touch measurement and a thickness measurement subroutine added to the measuring point program. The thickness measurement subroutine is a built-in program for thickness measurement of the ultrasonic probe. After the touch measurement is completed, the ultrasonic probe returns to the touch measurement starting point. S3: Determine whether the wall thickness value and the theoretical wall thickness value are within a specified deviation range. If so, proceed to S5; if not, record the current wall thickness value and obtain and store the tool compensation value corresponding to each weight reduction grid according to the relationship between the wall thickness value and the tool compensation value; S4: After calling the tool setting instrument to re-set the tool, return to S1; S5: Processing completed.

[0009] In some embodiments of the present application, S2 further includes: The digital model of the thin-walled part is imported into the PCDMIS NC software, and for a number of measuring points on each weight-reducing grid, a program is written in the manner of writing measuring vector points to measure the wall thickness values ​​of the several measuring points, wherein the several measuring points include a measuring point located at the center of the weight-reducing grid; Determine whether the wall thickness value of the measuring point at the center of the weight reduction grid and the wall thickness values ​​of the remaining measuring points are within the specified limit. If so, the wall thickness value of the measuring point at the center of the weight reduction grid is used as the wall thickness value of the corresponding weight reduction grid. If not, an alarm is issued.

[0010] In some embodiments of the present application, S2 further includes a step of verifying the measured wall thickness value, specifically: The wall thickness values ​​measured at several measuring points are compared with the wall thickness values ​​measured by a manual thickness gauge. If the deviation of the wall thickness values ​​measured at each corresponding measuring point is within the specified value, it means that the thickness measurement meets the use requirements, otherwise, it does not meet the use requirements.

[0011] The present application also relates to a processing system for reducing the weight of a thin-walled part, comprising: A machine tool, which is used to perform weight reduction processing on the thin-walled part, wherein the side wall of the thin-walled part to be reduced in weight has a plurality of weight reduction slots; An ultrasonic probe mounted on the machine tool spindle; The host computer is used to perform the following: S1: Call the processing program for weight reduction processing of thin-walled parts; S2: Start the PCDMIS NC software and call the thickness measurement program. The machine tool controls the ultrasonic probe to touch the single point on the weight-reducing grid and can also measure the wall thickness, so that the machine tool can simultaneously obtain the three-dimensional position coordinates and wall thickness value of the touch point; The thickness measurement program includes a measuring point program for 3D position touch measurement and a thickness measurement subprogram added to the measuring point program. The thickness measurement subprogram is a program provided by the ultrasonic probe for thickness measurement. After the touch measurement is completed, the ultrasonic probe returns to the touch measurement starting point. S3: Determine whether the wall thickness value and the theoretical wall thickness value are within a specified deviation range. If so, proceed to S5; if not, record the current wall thickness value and obtain and store the tool compensation value corresponding to each weight reduction grid according to the relationship between the wall thickness value and the tool compensation value; S4: After calling the tool setting instrument to re-set the tool, return to S1; S5: Processing completed.

[0012] In some embodiments of the present application, S2 further includes: The digital model of the thin-walled part is imported into the PCDMIS NC software, and for a number of measuring points on each weight-reducing grid, a program is written in the manner of writing measuring vector points to measure the wall thickness values ​​of the several measuring points, wherein the several measuring points include a measuring point located at the center of the weight-reducing grid; Determine whether the wall thickness value of the measuring point at the center of the weight reduction grid and the wall thickness values ​​of the remaining measuring points are within the specified limit. If so, the wall thickness value of the measuring point at the center of the weight reduction grid is used as the wall thickness value of the corresponding weight reduction grid. If not, an alarm is issued.

[0013] In some embodiments of the present application, S2 further includes a step of verifying the measured wall thickness value, specifically: The wall thickness values ​​measured at several measuring points are compared with the wall thickness values ​​measured by a manual thickness gauge. If the deviation of the wall thickness values ​​measured at each corresponding measuring point is within the specified value, it means that the thickness measurement meets the use requirements, otherwise, it does not meet the use requirements.

[0014] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief introduction is given below to the drawings required for use in the embodiments of the present invention or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 A flow chart of the automatic wall thickness measurement method proposed by the present invention; Figure 2 A digital model diagram of a part whose wall thickness is to be measured in the automatic wall thickness measurement method proposed by the present invention; Figure 3 A schematic diagram of nine measuring points selected on a digital model drawing of a part to be measured for the automatic wall thickness measurement method proposed by the present invention; Figure 4 The wall thickness values ​​of nine measuring points in a weight reduction grid measured by the automatic wall thickness measurement method proposed in the present invention; Figure 5 It is the wall thickness value of nine measuring points in a weight loss grid measured by a manual thickness gauge; Figure 6 The present invention is a flowchart of the method for reducing the weight of thin-walled parts. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0018] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0020] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0021] In order to avoid the problems of low efficiency and inability to meet the subsequent processing of batch parts caused by using manual thickness gauges to measure the wall thickness of parts, see Figure 1 The present application relates to an automatic wall thickness measurement method for parts (e.g., thin-walled parts), which can realize single-point thickness measurement in any direction after introducing an ultrasonic probe UTP and a PCDMIS NC software solution.

[0022] The automatic wall thickness measurement involved in this application is for better application in weight reduction processing of parts, therefore, the wall thickness measurement can be performed in conjunction with a machine tool.

[0023] Currently, there are two possible ways to collect wall thickness. One is to use third-party automated equipment to detect the wall thickness of the workpiece without using the machine tool itself; the other is to use the machine tool itself to drive the wall thickness measuring device to automatically detect the wall thickness of the workpiece.

[0024] The first method of using third-party equipment to measure without the machine tool itself has problems such as large investment, space occupation, and long data exchange chain. In addition, when cooperating with the machine tool for processing, the thickness detection value and tool compensation value detected by the first method are written into text, and then read into the system through the file reading function of the machine tool processing system, and compensation processing is performed; the second method only needs to install a wall thickness measuring device, and the machine tool can be used as a carrier to automatically measure the wall thickness of the workpiece, calculate the compensation value, and write it into the system at the same time. At present, the only device on the market that can be installed on the spindle of the machine tool and driven by the machine tool to detect the thickness of the workpiece is the ultrasonic probe RWP20.50-UTP.

[0025] Therefore, in some embodiments of the present application, an ultrasonic probe RWP20.50-UTP is used in combination with a matching receiver to complete hardware connection and wall thickness data collection.

[0026] It is a routine operation to use PCDMIS NC software to write a single-point measurement program, but the point measurement program generated by PCDMIS NC software can only measure the three-dimensional position coordinates of the current point and cannot directly measure the wall thickness value of the current point.

[0027] Since the thickness measurement program of the ultrasonic probe RWP20.50-UTP can only measure the planar thickness on the Z plane and cannot measure in any direction at any angle, it is a challenge to measure the wall thickness value at any 3D point of a three-dimensional cylindrical shape such as a cabin.

[0028] By converting the working plane, the thickness measurement program supporting the ultrasonic probe RWP20.50-UTP was used to measure the wall thickness at a non-Z-direction position and output it normally to the variable, which proves that the thickness measurement direction of the probe is not limited. Therefore, consider using PCDMIS NC software to write a thickness measurement program for three-dimensional position coordinate points. The reason is that PCDMIS NC software is a professional measurement software based on graphic programming, and there is no need to write too many additional measurement cycles.

[0029] Therefore, in some embodiments of the present application, the point measurement program responsible for touch measurement written in the PCDMIS NC software and the thickness measurement subroutine supporting the ultrasonic probe RWP20.50-UTP are combined and improved to form a thickness measurement program that can be called in the PCDMIS NC software, which can perform wall thickness measurement at any angle.

[0030] As follows, combined Figure 1 , an automatic wall thickness measurement method is described.

[0031] S11: Install the ultrasonic probe on the spindle of the machine tool.

[0032] As mentioned above, when the part is a thin-walled aerospace part (such as a cylindrical thin-walled part of a cabin section), a five-axis machine tool is required for processing. Therefore, the ultrasonic probe can be installed on the spindle of the five-axis machine tool and driven by the five-axis machine tool.

[0033] The ultrasonic probe has a matching thickness measurement subroutine for measuring the thickness of the current point.

[0034] In some embodiments of the present application, the working principle of the ultrasonic probe is described as follows.

[0035] When the probe touches a calibration block of known thickness, it will emit ultrasonic waves and receive them at the same time. By dividing the known distance of ultrasonic transmission by the time difference between emission and reception, the propagation speed of ultrasonic waves in the material is calculated and written into a variable for later use.

[0036] When using an ultrasonic probe to measure parts, the time difference between emitting and receiving the ultrasonic wave can still be directly obtained by the probe, and the propagation speed of the ultrasonic wave in the material has been obtained through calibration. Therefore, the thickness of the workpiece to be measured is obtained by multiplying the speed by the time divided by two.

[0037] S12: Start the PCDMIS NC software and call the thickness measurement program. The machine tool controls the ultrasonic probe to touch a single point on the part and can also measure the wall thickness of the touch point, so that the machine tool can obtain the three-dimensional position coordinates and wall thickness value of the touch point at the same time.

[0038] In some embodiments of the present application, a point measurement program written in PCDMIS NC software can realize touch measurement of any 3D point and obtain the three-dimensional position coordinates of the touch measurement point.

[0039] There is a touch sequence when touching. First, locate to a position a few millimeters away from the target point (which is used as the starting position), then touch the target point, after touching the target point, return to the starting point, and then touch the next point.

[0040] In this application, PCDMIS NC software is used to write a thickness measurement program, which includes the above-mentioned measuring point program and a thickness measurement subroutine added to the measuring point program, that is, a thickness measurement program matching the probe is added after touch measurement to achieve wall thickness measurement while touching.

[0041] When the thickness measurement program is executed, first locate to a position a few millimeters away from the target point (which is used as the starting point), then touch the target point and measure the wall thickness. After touching and obtaining the wall thickness value, return to the starting point and touch the next point.

[0042] In some embodiments of the present application, since the measuring point program written in the PCDMIS NC software is a 3D measuring point and a thickness measuring program is added on this basis, thickness measurement at any angle of the 3D point can be achieved.

[0043] In the measuring point program, the three-dimensional coordinates of the current starting point are assigned to the coordinates of the retraction target position, so that after the touch measurement is completed, the ultrasonic probe retracts to the starting point, and the starting point position coordinates are three-dimensional coordinates.

[0044] In some embodiments of the present application, the purpose of measuring the wall thickness is to reduce the weight of the parts. Therefore, a plurality of weight reduction grids (for example, square weight reduction grids) are formed on the side walls of the parts to be reduced in weight. These weight reduction grids are designed for weight reduction and are processed one by one on the parts.

[0045] See also Figure 2 , which shows that the part is a cylindrical thin-walled part of a cabin section and multiple weight-reducing grids on its inner wall to be reduced in weight.

[0046] In order to accurately measure the wall thickness and achieve weight reduction accuracy, a number of measuring points on each weight reduction grid are measured, and the number of measuring points need to include a measuring point located at the center of the weight reduction grid.

[0047] See also Figure 3 , which shows nine measuring points on a weight-reducing grid on a cylindrical thin-walled part of a cabin section. The nine measuring points are arranged in three rows and three columns in the weight-reducing grid, and the eight measuring points around the most central measuring point are used for comparison results with the most central measuring point.

[0048] In some embodiments of the present application, the wall thickness value of the weight-reducing grid is obtained as follows.

[0049] Import the digital model of the part into PCDMIS NC software. For the measurement points of each weight reduction grid, write a program in the same way as writing measurement vector points to measure the wall thickness value of each measurement point of each weight reduction grid.

[0050] Determine whether the wall thickness value of the measuring point at the center of the weight reduction grid and the wall thickness values ​​of the remaining measuring points are within the specified limit. If so, the wall thickness value of the measuring point at the center of the weight reduction grid is used as the wall thickness value of the corresponding weight reduction grid. If not, an alarm is issued.

[0051] See also Figure 4 ,exist Figure 3 When there are nine measuring points on a weight reduction grid shown, the wall thickness values ​​of the nine measuring points are automatically obtained.

[0052] Determine whether the wall thickness value of the measuring point at the center of the weight-reducing grid (i.e. ⑤) and the wall thickness values ​​of the remaining measuring points (i.e. ①②③④⑥⑦⑧⑨) are within the specified limits. If so, the wall thickness value of the measuring point at the center of the weight-reducing grid is used as the wall thickness value of the corresponding weight-reducing grid. If not, an alarm is issued.

[0053] In some embodiments of the present application, the automatic wall thickness measurement method further includes a step of verifying the measured wall thickness value, which is specifically as follows.

[0054] See also Figure 5 , which also shows that the thickness is measured by a manual thickness gauge Figure 3 The wall thickness values ​​at nine measuring points on a weight reduction grid are shown in FIG.

[0055] When verifying the wall thickness values ​​measured by the automatic wall thickness method, the wall thickness values ​​at the nine measuring points are compared with the wall thickness values ​​measured by the manual thickness gauge (for example, Figure 4 Measuring point ① and Figure 5 If the wall thickness deviation measured at the corresponding measuring point is within the specified value, it means that the thickness measurement meets the use requirements. Otherwise, it cannot meet the use requirements. In other words, the wall thickness value automatically measured cannot meet the requirements of subsequent part weight reduction processing, and the problem needs to be found.

[0056] See also Figure 5 The deviation between the measured results of the manual thickness gauge and the automatic thickness measurement using the ultrasonic probe UTP is within 0.02mm, which meets the use requirements.

[0057] After rough machining and before fine machining of aerospace thin-walled parts, the thin-walled parts need to be lightened. During the lightening process, the wall thickness of the thin-walled parts needs to be measured. The automatically measured wall thickness value is automatically read into the variable corresponding to the tool compensation value through the macro program. The tool compensation value for each weight reduction grid is stored in an independent variable.

[0058] The wall thickness value and the theoretical wall thickness value are subtracted to obtain the thickness deviation value. The customer can provide a preset relationship between the thickness deviation value and the tool compensation value and use a macro program to automatically calculate the column formula. Therefore, after measuring the wall thickness value, the tool compensation value can be obtained through the macro program.

[0059] See also Figure 6 , which shows a flow chart of a processing method for reducing the weight of aerospace thin-walled parts.

[0060] S1: The machine tool calls the processing program for weight reduction processing of thin-walled parts.

[0061] As mentioned above, when performing weight reduction processing on thin-walled parts, it is necessary to use the machine tool to call and start the processing program.

[0062] The thin-walled parts here can refer to the three-dimensional cylindrical shell of the cabin section, and the processing program performs a weight reduction process.

[0063] Before executing the machining program, the hardware, software, and required variables used in the machining should be configured.

[0064] S2: Start the PCDMIS NC software and call the thickness measurement program. The machine tool controls the ultrasonic probe to touch and measure the single point on the weight reduction grid while also performing thickness measurement, so that the machine tool can simultaneously obtain the three-dimensional position coordinates and wall thickness value of the touch point.

[0065] In this application, PCDMIS NC software is used to write a thickness measurement program, which includes the above-mentioned measuring point program and a thickness measurement subroutine added to the measuring point program, that is, a thickness measurement program matching the ultrasonic probe RWP20.50-UTP is added after touch measurement to realize wall thickness measurement while touching.

[0066] When the thickness measurement program is executed, first locate to a position a few millimeters away from the target point (which serves as the starting point), then touch the target point and measure the thickness. After touching and obtaining the wall thickness value, return to the starting point and touch the next point.

[0067] In some embodiments of the present application, since the point measurement program written in the PCDMIS NC software is a 3D point measurement program and a thickness measurement program is added on this basis, thickness measurement at any angle of the 3D point can be achieved.

[0068] In the measuring point program, the three-dimensional coordinates of the current starting point are assigned to the coordinates of the retraction target position, so that after the touch measurement is completed, the ultrasonic probe retracts to the starting point, and the starting point position coordinates are three-dimensional coordinates.

[0069] S3: Determine whether the wall thickness value and the theoretical wall thickness value are within the specified deviation range. If so, proceed to S5. If not, record the current wall thickness value and obtain and store the tool compensation value corresponding to each weight reduction grid based on the relationship between the wall thickness value and the tool compensation value.

[0070] In some embodiments of the present application, during the processing, a theoretical wall thickness value is set for each vibration damping grid, and the wall thickness value obtained by automatic measurement is compared with the theoretical wall thickness value. If the wall thickness value and the theoretical wall thickness value are within the specified deviation range, the process proceeds to S5, indicating that the processing is completed.

[0071] If the wall thickness value and the theoretical wall thickness value are not within the specified deviation range, it means that the current thickness is still too thick and needs to be reduced in weight. Therefore, the current wall thickness value is recorded (for example, the wall thickness value can be automatically written into the corresponding system custom variable) and based on the relationship between the wall thickness value and the tool compensation value.

[0072] This relationship can be a calculation formula determined by the customer based on actual requirements, and mathematical calculations can be performed in the macro program. For example, if the thickness difference is 0.04mm, the tool compensation value needs to be reduced by 0.04mm to achieve the desired processing. In fact, the tool compensation value calculation needs to be automatically calculated in the macro program based on the customer's actual situation.

[0073] Then, compensation is performed based on the updated tool compensation value before further processing.

[0074] It should be noted that the tool compensation value is the tool parameter required for CNC machine tool processing. Common tool parameters include tool length L and tool diameter R. Generally speaking, tool length L will affect the depth of the processed parts during processing, and tool diameter R will affect the size during processing. Tool length L includes shape and wear, and tool diameter R also includes shape and wear. For wall thickness reduction processing, different tool numbers are often used to compensate for the corresponding wear column.

[0075] S4: After calling the tool setting instrument to re-set the tool, return to S1; The tool setting probe is a device used to adjust the tool.

[0076] During the workpiece processing, auxiliary time such as workpiece loading and unloading and tool adjustment accounts for a considerable proportion of the processing cycle. Tool adjustment is time-consuming and labor-intensive, and not easy to be accurate. Finally, trial cutting is required. Therefore, the tool setting instrument shows great superiority in the workpiece processing process.

[0077] The tool setting process of the tool setting instrument belongs to the existing technology and will not be described in detail here.

[0078] After the tool setting instrument has re-calibrated the tool, the weight reduction processing is performed on the weight reduction grids that do not meet the requirements until the requirements are met and the processing is completed.

[0079] S5: Processing completed.

[0080] At this point, the weight reduction process is completed.

[0081] The processing method involved in the present application can automatically measure the three-dimensional position coordinates and wall thickness value of the target point, and use the measured wall thickness value to automatically calculate the compensation value of the tool and automatically process, preparing for the future realization of fully automatic loading and unloading. From wall thickness measurement to tool compensation value calculation to automatic compensation processing, it realizes high-efficiency and high-precision processing without human intervention, fundamentally solving the problems of low measurement efficiency and processing efficiency, and achieving the customer's expected goal of fully automatic measurement to finished product with one click.

[0082] Moreover, this processing method fully meets the user's expectation of achieving fully automatic processing with one-time clamping, avoids the human errors in manual measurement records and the time consumption of manually entering the measurement values ​​into the machine tool processing system, and greatly improves the user's production automation level and processing efficiency. This processing method improves the production efficiency of this type of parts by more than 60%.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic wall thickness measurement method, characterized in that: include: Install the ultrasonic probe on the spindle of the machine tool; Start the PCDMIS NC software and call the thickness measurement program. The machine tool controls the ultrasonic probe to touch a single point on the part and can also measure the wall thickness of the touch point, so that the machine tool can simultaneously obtain the three-dimensional position coordinates and wall thickness value of the touch point; The thickness measurement program includes a measuring point program for 3D position touch measurement and a thickness measurement subprogram added to the measuring point program. The thickness measurement subprogram is a built-in program for thickness measurement of the ultrasonic probe. After the touch measurement is completed, the ultrasonic probe returns to the touch measurement starting point.

2. The automatic wall thickness measurement method according to claim 1, characterized in that: A plurality of weight-reducing grids are formed on the side wall of the part to be weight-reduced, and a plurality of measuring points on each weight-reducing grid are measured, wherein the plurality of measuring points include a measuring point located at the center of the weight-reducing grid; the automatic wall thickness measurement method further comprises: Import the digital model of the part into PCDMIS NC software, and write a program for the measurement points of each weight reduction grid in the same way as writing measurement vector points to measure the wall thickness value of each measurement point of each weight reduction grid; Determine whether the wall thickness value of the measuring point at the center of the weight reduction grid and the wall thickness values ​​of the remaining measuring points are within the specified limit. If so, the wall thickness value of the measuring point at the center of the weight reduction grid is used as the wall thickness value of the corresponding weight reduction grid. If not, an alarm is issued.

3. The automatic wall thickness measurement method according to claim 2, characterized in that: The automatic wall thickness measurement method further comprises the step of verifying the measured wall thickness value, specifically: The wall thickness values ​​measured at the several measuring points are compared with the wall thickness values ​​measured by a manual thickness gauge. If the deviation of the wall thickness values ​​measured at each corresponding measuring point is within the specified value, it means that the wall thickness value measurement meets the use requirements, otherwise, it cannot meet the use requirements.

4. A processing method for reducing the weight of a thin-walled part, wherein the side wall of the thin-walled part to be reduced in weight has a plurality of weight-reducing slots, characterized in that: The processing method comprises: S1: The machine tool calls a processing program for weight reduction processing of the thin-walled part; S2: Start the PCDMIS NC software and call the thickness measurement program. The machine tool controls the ultrasonic probe to touch the single point on the weight-reducing grid and can also measure the wall thickness, so that the machine tool can simultaneously obtain the three-dimensional position coordinates and wall thickness value of the touch point; The ultrasonic probe is installed on the main shaft of the machine tool. The thickness measurement program includes a measuring point program for 3D position touch measurement and a thickness measurement subroutine added to the measuring point program. The thickness measurement subroutine is a built-in program for thickness measurement of the ultrasonic probe. After the touch measurement is completed, the ultrasonic probe returns to the touch measurement starting point. S3: Determine whether the wall thickness value and the theoretical wall thickness value are within a specified deviation range. If so, proceed to S5; if not, record the current wall thickness value and obtain and store the tool compensation value corresponding to each weight reduction grid according to the relationship between the wall thickness value and the tool compensation value; S4: After calling the tool setting instrument to re-set the tool, return to S1; S5: Processing completed.

5. The processing method according to claim 4, characterized in that: S2 also includes: The digital model of the thin-walled part is imported into the PCDMIS NC software, and for a number of measuring points on each weight-reducing grid, a program is written in the manner of writing measuring vector points to measure the wall thickness values ​​of the several measuring points, wherein the several measuring points include a measuring point located at the center of the weight-reducing grid; Determine whether the wall thickness value of the measuring point at the center of the weight reduction grid and the wall thickness values ​​of the remaining measuring points are within the specified limit. If so, the wall thickness value of the measuring point at the center of the weight reduction grid is used as the wall thickness value of the corresponding weight reduction grid. If not, an alarm is issued.

6. The processing method according to claim 5, characterized in that: S2 also includes the step of verifying the measured wall thickness value, specifically: The wall thickness values ​​measured at several measuring points are compared with the wall thickness values ​​measured by a manual thickness gauge. If the deviation of the wall thickness values ​​measured at each corresponding measuring point is within the specified value, it means that the thickness measurement meets the use requirements, otherwise, it does not meet the use requirements.

7. A processing system for reducing the weight of thin-walled parts, characterized in that: include: A machine tool, which is used to perform weight reduction processing on the thin-walled part, wherein the side wall of the thin-walled part to be reduced in weight has a plurality of weight reduction slots; An ultrasonic probe mounted on the machine tool spindle; The host computer is used to perform the following: S1: Call the processing program for weight reduction processing of thin-walled parts; S2: Start the PCDMIS NC software and call the thickness measurement program. The machine tool controls the ultrasonic probe to touch the single point on the weight-reducing grid and can also measure the wall thickness, so that the machine tool can simultaneously obtain the three-dimensional position coordinates and wall thickness value of the touch point; The thickness measurement program includes a measuring point program for 3D position touch measurement and a thickness measurement subprogram added to the measuring point program. The thickness measurement subprogram is a program provided by the ultrasonic probe for thickness measurement. After the touch measurement is completed, the ultrasonic probe returns to the touch measurement starting point. S3: Determine whether the wall thickness value and the theoretical wall thickness value are within a specified deviation range. If so, proceed to S5; if not, record the current wall thickness value and obtain and store the tool compensation value corresponding to each weight reduction grid according to the relationship between the wall thickness value and the tool compensation value; S4: After calling the tool setting instrument to re-set the tool, return to S1; S5: Processing completed.

8. The processing system according to claim 7, characterized in that: S2 also includes: The digital model of the thin-walled part is imported into the PCDMIS NC software, and for a number of measuring points on each weight-reducing grid, a program is written in the manner of writing measuring vector points to measure the wall thickness values ​​of the several measuring points, wherein the several measuring points include a measuring point located at the center of the weight-reducing grid; Determine whether the wall thickness value of the measuring point at the center of the weight reduction grid and the wall thickness values ​​of the remaining measuring points are within the specified limit. If so, the wall thickness value of the measuring point at the center of the weight reduction grid is used as the wall thickness value of the corresponding weight reduction grid. If not, an alarm is issued.

9. The processing system according to claim 7, characterized in that: S2 also includes the step of verifying the measured wall thickness value, specifically: The wall thickness values ​​measured at several measuring points are compared with the wall thickness values ​​measured by a manual thickness gauge. If the deviation of the wall thickness values ​​measured at each corresponding measuring point is within the specified value, it means that the thickness measurement meets the use requirements, otherwise, it does not meet the use requirements.

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