Test method and test tool for checking service life of cutter

Abstract

The invention relates to a testing tool and method for testing the service life of a tool, the adopted testing tool is provided with a tool nose testing tool service life testing area and a blade testing tool service life testing area, and the method comprises the following steps: setting a tool nose processing path, enabling a blade to cut the tool nose testing tool service life testing area along the set tool nose processing path, determining a blade abrasion position according to the machining effect to obtain the length distance of a tool nose machining path between the blade abrasion position and the tool nose machining starting point, and further obtaining the real service life of the blade; and setting a blade machining path, enabling the blade to cut the blade test cutter service life inspection area along the set blade machining path, and determining a blade wear position according to the machining effect to obtain the length distance of the blade machining path between the blade wear position and the blade machining starting point so as to obtain the real service life of the blade. The real service life of the cutter is obtained according to actual detection data, and the cutter life of the cutter tip and the cutter life of the blade are effectively distinguished.

Description

Technical Field

[0001] The invention relates to a testing method and a testing tool for checking the life of a tool, belonging to the technical field of tool detection for machine tools. Background Art

[0002] In the field of CNC machining, ball cutters, as key cutting tools, have always faced technical difficulties in accurately assessing their tool life. Currently, the life data provided by different tool manufacturers is irrational. For example, different manufacturers provide the same tool life time, making it difficult for users to determine whether domestic ball cutters truly meet the performance level of imported products.

[0003] At present, in actual processing, processing time is usually used as a measure of tool life, but this method has obvious limitations: on the one hand, unstable factors such as fluctuations in workpiece allowance, changes in tool clamping length, and differences in cutting fluid performance during the processing process will indirectly affect the actual degree of tool wear; on the other hand, when abnormal tool wear occurs, tool manufacturers and machine tool manufacturers often blame each other. For example, the tool manufacturer believes that the tool life is shortened due to the machine tool, thus forming a vicious circle of responsibility identification. Especially for expensive tools made of cemented carbide materials, tool life becomes an important factor affecting production costs. Summary of the Invention

[0004] The present invention provides a testing method and test tool for verifying tool life, aiming to address at least one of the technical problems existing in the prior art. To this end, the present invention proposes a testing method and test tool for verifying tool life. Through the designed test tool and test method, the true tool life can be determined based on actual test data, effectively distinguishing tools from different manufacturers.

[0005] The technical solution of the present invention relates to a testing method for testing tool life, which applies machine tool tool processing and adopts a testing tool, wherein the testing tool is provided with a tool tip test tool life testing area and a tool edge test tool life testing area;

[0006] The method for checking tool life according to the present invention comprises the following steps:

[0007] Install the tool to be inspected on the machining spindle of the machine tool and fix the test tool on the workbench of the machine tool;

[0008] Setting a tool tip processing path, starting the machine tool, causing the tool blade to cut along the set tool tip processing path in the tool tip test tool life inspection area, determining the tool tip wear position based on the processing effect, and obtaining a length distance of the tool tip processing path between the tool tip wear position and the tool tip processing starting point, thereby obtaining the actual life of the tool blade;

[0009] Set the blade processing path, start the machine tool, make the tool blade cut along the set blade processing path, cut the blade test tool life inspection area, determine the blade wear position according to the processing effect, and obtain the length distance of the blade processing path between the blade wear position and the blade processing starting point, and then obtain the real life of the tool blade.

[0010] Furthermore, a cutting length distance of the tool tip is set, and processing is stopped when the processing distance of the tool tip reaches the cutting length distance of the tool tip; a cutting length distance of the blade is set, and processing is stopped when the processing distance of the tool blade reaches the cutting length distance of the blade.

[0011] Furthermore, the roughness of the machining surface of the tool life inspection area of ​​the tool tip test is detected by a roughness tester to determine the tool tip wear position and obtain the length distance of the tool tip processing path between the tool tip wear position and the starting point of the tool tip processing; the roughness of the machining surface of the tool life inspection area of ​​the blade test is detected by a roughness tester to determine the blade wear position and obtain the length distance of the blade processing path between the blade wear position and the starting point of the blade processing.

[0012] Furthermore, a roughness test is performed on the positions where the machining surface of the tool tip test tool life inspection area is whitened, fuzzed, or the roughness Ra is greater than 1um; a roughness test is performed on the positions where the machining surface of the tool tip test tool life inspection area is whitened, fuzzed, or the roughness Ra is greater than 1um.

[0013] Furthermore, different positions of the tool edge are used to perform cutting processing on the tool edge test tool life inspection area.

[0014] Furthermore, the tool tip test tool life inspection area is provided with a 200mm*100mm test plane, and the tool tip cutting length is set to 400mm.

[0015] Furthermore, the tool tip test tool life inspection area is provided with a test bevel of 200mm*100mm*50mm, and the blade cutting length is set to 500mm.

[0016] Another aspect of the technical solution of the present invention relates to a test tool for testing tool life, characterized in that it includes: a tool tip test tool life inspection area for detecting tool tip life and a tool edge test tool life inspection area for detecting tool edge life.

[0017] Furthermore, the tool tip test tool life inspection area is provided with a test plane for tool tip parallel finishing, and the tool edge test tool life inspection area is provided with a test inclined surface for tool edge parallel finishing.

[0018] Furthermore, the slope of the test slope is set to 45 degrees.

[0019] The beneficial effects of the present invention are as follows.

[0020] The testing method and testing tool for testing tool life of the embodiment of the present invention can be used to test the maximum life of ball cutter tools in CNC processing, and truly display the actual life of tools from different manufacturers, so that customers can choose tools that truly meet the processing conditions.

[0021] Based on the machinable range of the ball cutter and the machining performance required by the machine tool machining path, the functional area of ​​the test fixture and the test machining method steps are determined. By analyzing the actual machining trajectory and machining surface roughness of the ball cutter on the test fixture, the actual life of the tool can be accurately evaluated.

[0022] The testing tool of the present invention is provided with a tool life inspection area for testing a tip of the tool and a tool life inspection area for testing a blade. The tool life inspection area for testing a tip of the tool is used to test the durability of the tool tip, and the tool life inspection area for testing a blade is used to test the durability of the tool blade. Thus, by designing standardized test pieces and test methods, the service lives of the tip of the tool and the blade can be tested respectively, and the overall performance of the ball knife can be evaluated more scientifically and accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0024] Figure 1 4 is a basic flow chart of a testing method for inspecting tool life according to an embodiment of the present invention.

[0025] Figure 2 4 is a schematic structural diagram of a testing tool for inspecting tool life according to an embodiment of the present invention.

[0026] Figure 3 2 is a schematic diagram of a tool tip machining process in a tool tip test tool life inspection area according to an embodiment of the present invention.

[0027] Figure 4 2 is a schematic diagram of a blade processing process in a blade testing tool life inspection area according to an embodiment of the present invention. DETAILED DESCRIPTION

[0028] The following will be combined with the embodiments and drawings to clearly and completely describe the concept, specific structure and technical effects of the present invention so as to fully understand the purpose, scheme and effect of the present invention. It should be noted that the embodiments and features in the embodiments of this application can be combined with each other unless there is a conflict.

[0029] It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature. Furthermore, terms such as "upper," "lower," "left," "right," "top," and "bottom" used in this disclosure are intended solely to describe the relative positions of the components of the disclosure as shown in the accompanying drawings.

[0030] In addition, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art. The terms used in this specification are only for describing specific embodiments and are not intended to limit the present invention. The term "and / or" as used herein includes any combination of one or more of the related listed items.

[0031] It should be understood that although the terms first, second, third, etc. may be used to describe various elements in the present disclosure, these elements should not be limited to these terms. These terms are only used to distinguish elements of the same type from each other. For example, a first element may also be referred to as a second element, and similarly, a second element may also be referred to as a first element without departing from the scope of the present disclosure.

[0032] See also Figures 1 to 4 The tool life testing device of the present invention is provided with a tool life testing area for tool tip testing and a tool life testing area for tool edge testing. The tool life testing device of the present invention is used in the tool life testing method of the present invention. Specifically, the tool life testing area for tool tip testing is provided with a test plane for tool tip parallel finishing, and the tool life testing area for tool edge testing is provided with a test inclined surface for tool edge parallel finishing.

[0033] It should be noted that the test tool of the embodiment of the present invention can be made of cemented carbide material. In recent years, cemented carbide has been increasingly used in high-end manufacturing fields such as aerospace and precision molds. The extremely high hardness and good wear resistance of cemented carbide workpieces place higher demands on the life and performance of machining tools. For example, the hardness of cemented carbide is usually above HRA 90, and the tool is prone to rapid passivation due to abrasive wear. For example, cemented carbide has poor thermal conductivity, and the cutting heat is concentrated at the tip of the tool, which can easily lead to softening or diffuse wear of the tool material. The high brittleness of the workpiece material may cause cutting vibration, and the tool is prone to micro-chipping. Therefore, it is very important to test the actual life of the tool when machining cemented carbide materials. At the same time, because the cemented carbide workpiece itself is relatively expensive, and the tool life is an important factor affecting the workpiece processing quality, the present invention can use a test tool made of cemented carbide material to specifically obtain the actual life of the tool when machining the cemented carbide workpiece. It is understandable that the test tool of the embodiment of the present invention can also be flexibly made of different materials according to the customer's processing products.

[0034] It is understood that the cutting tools tested in the present method are made of cemented carbide, a preferred material for cutting tools. Cemented carbide possesses exceptional hardness, wear resistance, and excellent thermal toughness, making it ideal for cutting mold steel and the most widely used tool manufacturing field. Ensuring that the cutting tool is harder than the material being worked ensures that the material itself is not a factor in the cutting process. Therefore, despite its high price, cemented carbide cutting tools are increasingly widely used.

[0035] See also Figures 1 to 4 The testing method for inspecting tool life of the technical solution of the present invention is applied to machine tool processing and adopts a testing tool, and the testing tool is provided with a tool tip test tool life inspection area and a blade test tool life inspection area.

[0036] Test methods used to verify tool life include:

[0037] Install the tool to be inspected on the machining spindle of the machine tool and fix the test tool on the workbench of the machine tool;

[0038] Set the tool tip processing path, start the machine tool, make the tool edge follow the set tool tip processing path, cut the tool tip test tool life inspection area, determine the tool edge wear position based on the processing effect, and obtain the tool tip processing path length between the tool edge wear position and the tool tip processing starting point, and then obtain the actual tool edge life;

[0039] Set the blade processing path, start the machine tool, make the tool blade follow the set blade processing path, cut the blade test tool life inspection area, determine the blade wear position according to the processing effect, and obtain the length distance of the blade processing path between the blade wear position and the blade processing starting point, and then obtain the real life of the tool blade.

[0040] The present invention can be used to test the maximum life of ball cutter tools in CNC machining, and truly display the actual life of tools from different manufacturers, so that customers can choose tools that truly meet machining conditions.

[0041] It should be noted that the difficulty in assessing the life of ball cutters in existing technology stems primarily from their unique structural characteristics: ball cutters experience two key wear zones during machining: the tip and the cutting edge. Traditional life calculations based on machining time are unable to distinguish between the differential wear of these two areas during the actual machining process. This makes it impossible to accurately quantify the overall life of the tool, and even more difficult to compare the actual performance differences between tools from different brands. Despite the urgent market demand for ball cutter life testing, there is currently a lack of standardized testing protocols that can simulate real-world machining conditions and independently analyze tip and cutting edge wear.

[0042] To address these technical limitations, the present ball cutter tool life testing method utilizes specialized testing equipment and a specific testing process to precisely separate the machining path distance between the tool tip and the cutting edge, thereby establishing a tool life evaluation system based on actual cutting distance. This method effectively addresses the inherent shortcomings of traditional time measurement methods, providing an objective, quantifiable evaluation standard for tool performance comparison, and facilitating user selection of tool products from different manufacturers based on actual machining conditions.

[0043] In some embodiments, the present invention determines the functional area of ​​a test fixture and the test processing method steps based on the ball cutter's processable range and the required processing performance of the machine tool's processing path. This allows for accurate assessment of the tool's true lifespan by analyzing the ball cutter's actual processing trajectory and surface roughness on the test fixture. Specifically, based on the ball cutter's processable range, a test cutting path and processing method are defined, ensuring that the test process covers the tool's entire processing area. The tool's true processing distance can be determined based on the processing results, effectively distinguishing between the tool tip's processing distance and the tool edge's processing distance.

[0044] In some embodiments, current methods for assessing the life of ball cutters only roughly calculate tool life based on machining time. This existing method cannot accurately reflect the true life of the tool. In particular, due to fluctuations in cutting parameters during actual machine tool processing, such as differences in machining parameters each time, which in turn has a certain impact on tool life, the tool life data collected by customers often has large deviations, resulting in greater uncertainty as to whether the tool life can meet machining requirements during CNC machining. To effectively address this issue, the present invention proposes a detection method for testing tool life, in which the machining steps specifically separate the tool tip machining and the blade machining, allowing the ball cutter tip and the ball cutter blade to be tested separately, thereby more accurately calculating the tool life.

[0045] Specifically, the present invention uses a self-designed test tool and test method to test the tool life of the ball cutter. Figure 2 The test tool is equipped with a tool life inspection area for testing the tip and blade. The tip area is used to test the durability of the tool tip, while the blade area is used to test the durability of the tool blade. By designing standardized test pieces and testing methods, the present invention can test the service life of the tip and blade separately, thereby more scientifically and accurately evaluating the overall performance of the ball cutter.

[0046] In some embodiments, see Figure 3In the detection method for inspecting the tool life of an embodiment of the present invention, a tool tip test tool life inspection area is provided with a test plane for tool tip parallel finishing. The method of the present invention sets the tool tip cutting path and the length distance of processing along the cutting path. During the processing, only the tool tip is used to cut the test plane of the test tool. According to the actual processing effect, the test plane is tested in conjunction with the roughness tester to determine the critical position and limit position of the tool tip cutting processing, and the length distance of the processing path at the above position is obtained, thereby obtaining the effective life of the tool tip.

[0047] In one application embodiment, the test plane size is 200*100mm (length*width), the total distance of the cutting path is 400000mm, which is decomposed into 1000 segments of 400mm, that is, each parallel cutting path of the tool tip cutting path is 400mm long. In the processing path with a length of 400000mm, only the tool tip is used to cut the test plane. When the cutting point of the tool tip is zero during the processing, it can be determined that the tool tip has reached a critical distance of wear. At this time, the processing plane begins to turn white, fuzzy, or the roughness Ra is greater than 1um. It should be noted that the tool tip processing path of the embodiment of the present invention is set to: linear finishing on a 200mm*100mm plane, the cutting spacing is 0.02mm, the long side of the cutting path is parallel to the long side of the test tool, and the short side is a micro-motion distance of 0.02mm.

[0048] The test surface is then tested using a roughness tester to determine the location of tool tip wear where the cutting point reaches zero. The tool tip wear location is then determined, and the length of the tool tip machining path between the wear location and the starting point of the tool tip machining process is measured to determine the true lifespan of the tool tip. It should be noted that when using a roughness tester to inspect a machining surface, if a roughness Ra greater than 1µm is detected on a 200mm*100mm plane, it is considered completely worn. Less than 1µm indicates the tool is still within the usable range.

[0049] It should be noted that the tool tip processing path of the method of the present invention is set to 400mm per section, which meets the requirements of the design test plane and also reflects the cutting ability and cutting life of the tool. When the tool can complete each section of processing 400mm, processing 1000 times, and the roughness Ra is less than 1um, it proves that the design, material and coating technology of the tool are mature and can ensure stable performance during the milling process.

[0050] In some embodiments, see Figure 4In the detection method for inspecting the tool life of an embodiment of the present invention, a blade test tool life inspection area is provided with a test bevel for blade parallel finishing. The method of the present invention sets the blade cutting path and the length distance of processing along the cutting path. During the processing, only the blade is used to cut the test bevel of the test tool. According to the actual processing effect, the test bevel is tested in conjunction with the roughness tester to determine the critical position and limit position of the tool blade cutting processing, and the length distance of the processing path at the above position is obtained, thereby obtaining the effective life of the tool blade.

[0051] Furthermore, the test bevel in this embodiment of the present invention is set at a 45-degree angle. When the machining angle is 45 degrees, every point on the cutting edge participates in the cutting process, ensuring that the wear of each different machining area of ​​the tool's cutting edge is measured. Furthermore, the test fixture height in this embodiment of the present invention is set at 50. This is because when cutting with an R3 tool, the 45-degree angle ensures that the tool length is within four times the tool diameter. This ensures that tool wear is not caused by excessive tool length.

[0052] In one embodiment, the test bevel measures 200*100*50mm (length*width*height), and the total cutting path is 500,000mm, broken down into 5,000 100mm segments. This total distance is broken down into multiple 100mm segments, meaning each segment of the blade cutting path is 100mm long. During this 100mm machining path, the test bevel is cut solely using the tool blade, and cutting is performed at different positions of the tool blade. This means that as different positions of the test bevel are continuously cut, the cutting position of the tool blade also changes. If the machined bevel exhibits whitening, fuzzing, or stringing during machining, or exhibits a roughness Ra greater than 1µm, blade wear can be determined, indicating the tool blade has reached its limit of life. It should be noted that when using a roughness tester to test the machined bevel, a roughness Ra greater than 1µm on a 200mm*50mm bevel is considered completely worn, while a Ra less than 1µm indicates the tool is still within its usable range.

[0053] The test bevel is then tested using a roughness tester to determine the location of blade wear where the tool blade is worn. The true life of the tool blade can be determined by measuring the length of the blade machining path between the blade wear location and the starting point of blade machining. It should be noted that the blade machining path in the embodiment of the present invention is set to: perform fine machining on a 200mm*50mm bevel, with a cutting width of 100mm, a cutting path with 50mm edges as the upper and lower edges, and a micro-motion distance of 0.05mm on the long side.

[0054] It should be noted that the blade processing path of the method of the present invention is set to 100mm per section, which meets the design and test requirements of the 45-degree bevel processing, and also reflects the cutting ability and cutting life of the tool. When the tool blade can complete each section of 100mm, after processing 5000 times, and the roughness Ra is less than 1um, it proves that the design, material and coating technology of the tool are mature and can ensure stable performance during the milling process.

[0055] The above description is merely a preferred embodiment of the present invention. The present invention is not limited to the aforementioned embodiments. As long as the technical effects of the present invention are achieved by the same means, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure shall be included within the scope of protection of the present disclosure. Within the scope of protection of the present invention, its technical solutions and / or implementation methods may be modified and varied in various ways.

Claims

1. A test method for inspecting tool life, characterized in that: The machine tool is used for processing, and a test tool is used, wherein the test tool is provided with a tool tip test tool life inspection area and a tool edge test tool life inspection area; The test methods for verifying tool life include: Install the tool to be inspected on the machining spindle of the machine tool and fix the test tool on the workbench of the machine tool; Setting a tool tip processing path, starting the machine tool, causing the tool blade to cut along the set tool tip processing path in the tool tip test tool life inspection area, determining the tool tip wear position based on the processing effect, and obtaining a length distance of the tool tip processing path between the tool tip wear position and the tool tip processing starting point, thereby obtaining the actual life of the tool blade; Set the blade processing path, start the machine tool, make the tool blade cut along the set blade processing path, cut the blade test tool life inspection area, determine the blade wear position according to the processing effect, and obtain the length distance of the blade processing path between the blade wear position and the blade processing starting point, and then obtain the real life of the tool blade.

2. The method according to claim 1, characterized in that Setting a tool tip cutting length, and stopping processing when the tool tip processing distance reaches the tool tip cutting length; A blade cutting length is set, and processing is stopped when the processing distance of the tool blade reaches the blade cutting length.

3. The method according to claim 1, characterized in that Testing the roughness of the machining surface of the tool tip test tool life inspection area by a roughness tester to determine the tool tip wear position and obtain the length of the tool tip machining path between the tool tip wear position and the tool tip machining starting point; The roughness of the machining surface of the blade test tool life inspection area is tested by a roughness tester to determine the blade wear position and obtain the length distance of the blade machining path between the blade wear position and the blade machining starting point.

4. The method according to claim 3, characterized in that Performing roughness testing on the machining surface of the tool tip test tool life inspection area where whitening, fuzzing or roughness Ra is greater than 1 μm; The roughness test is performed on the whitening, fuzzing or roughness Ra greater than 1 μm of the processing surface of the tool tip test tool life inspection area.

5. The method according to claim 1, wherein The cutting edge test tool life inspection area is cut using different positions of the tool edge.

6. The method according to claim 2, characterized in that The tool tip test tool life inspection area is provided with a 200mm*100mm test plane, and the tool tip cutting length distance is set to 400mm.

7. The method according to claim 2, characterized in that The tool tip test tool life inspection area is provided with a test bevel of 200mm*100mm*50mm, and the blade cutting length is set to 500mm.

8. A test tool for testing tool life, characterized in that: include: Tool life inspection area for tool tip test for detecting tool tip life and tool edge test for detecting tool edge life.

9. The testing tool for checking tool life according to claim 8, characterized in that: The tool tip test tool life inspection area is provided with a test plane for tool tip parallel finishing, and the tool edge test tool life inspection area is provided with a test inclined surface for tool edge parallel finishing.

10. The testing tool for checking tool life according to claim 9, characterized in that: The slope of the test slope is set to 45 degrees.

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