Automatic tool setting and calibrating device of multi-axis linkage machine tool

Abstract

The utility model provides an automatic tool setting and calibrating device for a multi-axis linkage machine tool. The automatic tool setting and calibrating device comprises a tool setting gauge and a tool setting frame which are arranged on a base; the tool setting gauge is fixedly installed on the base, a telescopic tool setting probe is arranged on the top of the tool setting gauge, and laser distance measuring sensors distributed in the cross direction are arranged on the outer side of the bottom of the tool setting gauge. The tool setting frame is installed on the base in a sliding mode, and a nested installation structure is formed between the tool setting frame and the tool setting gauge. The butt joint mechanism comprises a butt joint rod which is installed on the tool setting frame in a lifting mode. The top of the butt-joint rod is provided with a matched butt-joint groove corresponding to the tool bit, and the butt-joint rod is connected with the tool setting frame through a butt-joint frame; the butt joint frame is installed on the tool setting frame in a lifting mode, and a supporting spring is further arranged between the butt joint frame and the tool setting frame. According to the tool setting gauge, the top of the butt joint rod is provided with the horn-mouth-shaped butt joint groove, and automatic centering of the tool and the tool setting gauge can be effectively achieved; and the position deviation of the tool in the X-axis direction, the Y-axis direction and the Z-axis direction can be synchronously detected in cooperation with the nested structural design of the cross laser distance measuring sensor at the bottom of the tool setting gauge and the slidable tool setting frame.

Description

Technical Field

[0001] This application relates to the field of machining technology, specifically to an automatic tool setting and calibration device for a multi-axis linkage machine tool. Background Technology

[0002] A CNC machine tool is an automated machine tool equipped with a program control system, which can make the machine tool move and process parts according to a pre-programmed program. CNC machine tools integrate the latest technologies in mechanics, automation, computers, measurement, and microelectronics, and use a variety of sensors. Among them, the position detection of machining tools during processes such as tool replacement, installation, and tool wear is called tool setting.

[0003] The purpose of tool setting is to determine the position of the program origin in the machine tool coordinate system. The tool setting point can be set on the workpiece, the fixture, or the machine tool. In order to determine the position of the tool starting point in the machine tool coordinate system, the operator needs to perform a trial cut for tool setting. Milling machines can use an optical tool setting device to set the tool, thereby obtaining the exact position of the starting point in the machine tool coordinate system.

[0004] When multi-tool machining centers process workpieces, the tools need to be changed according to the processing requirements. However, due to the different types of tools and the randomness of their installation, the tool tip position may deviate. It is necessary to measure and calculate the tool compensation value for each tool individually. Tool setting is usually performed using a tool setting instrument. However, due to the deviation in the tool tip position, the positioning between the tool setting instrument and the tool is inaccurate. Furthermore, most existing tool setting instruments position the tool based on the Z-axis coordinate, which is not convenient for detecting the offset on the X and Y axes. Therefore, the above problems urgently need to be solved. Summary of the Invention

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide an automatic tool setting and calibration device for multi-axis linkage machine tools.

[0006] This application provides an automatic tool setting and calibration device for a multi-axis linkage machine tool, including...

[0007] The base is provided with a tool setting device and a tool setting holder for fixed connection with the machine tool worktable;

[0008] The tool setting device is fixedly installed on the base, with a retractable tool setting probe on the top and laser range sensors arranged in a cross direction on the outer side of the bottom.

[0009] The tool setting holder is slidably mounted on the base, forming a nested installation structure with the tool setting device;

[0010] A docking mechanism, which is mounted on top of the tool setter and includes a docking rod that can be lifted and lowered on the tool setter;

[0011] The top of the docking rod is provided with a matching docking groove corresponding to the cutter head, and is connected to the cutter holder through a docking bracket;

[0012] The opening end of the docking groove is flared to automatically align with the cutting head;

[0013] The docking frame can be lifted and installed on the tool setting frame, and a support spring is provided between the docking frame and the tool setting frame to drive the docking rod to automatically dock with the tool head.

[0014] Furthermore,

[0015] The tool holder and the base are connected by a sliding plate;

[0016] The slide plate and the base are connected by a first linear guide slider, and a matching through square hole is provided in the middle corresponding to the tool setting device;

[0017] The base is provided with a matching first slide rail corresponding to the first linear guide slider, which is used to form a sliding connection with the slide plate.

[0018] Furthermore,

[0019] The tool holder and the slide are connected by a second linear guide slider;

[0020] The second linear guide slider is fixedly mounted on the tool setter, and its sliding direction is perpendicular to the sliding direction of the first linear guide slider.

[0021] The slide plate is provided with a matching second slide rail corresponding to the second linear guide slider, which is used to form a sliding connection with the tool holder.

[0022] Furthermore,

[0023] The docking frame is cross-shaped, with fixed sliders installed at its four ends for sliding connection with the tool holder.

[0024] The tool holder is provided with matching grooves corresponding to the fixed sliders;

[0025] The support spring is installed in the groove, located below the fixed slider, and is used to support and reset the fixed slider.

[0026] Furthermore,

[0027] The docking frame is also equipped with a level tube;

[0028] The number of level tubes includes four, which are respectively installed on the four extension arms of the docking frame, and are used to detect the levelness of the docking frame and the installation levelness of the base.

[0029] Furthermore,

[0030] The docking frame and the docking rod are fixedly connected;

[0031] The docking rod is located in the middle of the docking frame and passes through the docking frame in a vertical direction;

[0032] The docking groove is located above the docking frame and is used to dock with the cutter head;

[0033] The end of the docking rod furthest from the docking slot is located below the docking frame and is used to dock with the probe.

[0034] Furthermore,

[0035] The tool setting holder is also equipped with a reflector corresponding to the laser rangefinder sensor, which is used to detect the displacement of the tool setting holder relative to the tool setting instrument.

[0036] The advantages and positive effects of this application are:

[0037] This technical solution effectively achieves automatic alignment between the cutting tool and the tool setter by setting a funnel-shaped docking groove at the top of the docking rod. Combined with the elastic reset mechanism of the support spring, it ensures precise fit between the cutting head and the docking mechanism. Furthermore, the nested structure design of the cross laser rangefinder sensor at the bottom of the tool setter and the sliding tool setter holder allows for simultaneous detection of the tool's positional deviation in the X, Y, and Z axes. Compared to traditional tool setters that only support Z-axis compensation, this solution provides more comprehensive detection and higher accuracy. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the structure of the automatic tool setting and calibration device for a multi-axis linkage machine tool provided in the embodiments of this application;

[0039] Figure 2 A schematic diagram of the docking frame of the automatic tool setting and calibration device for multi-axis linkage machine tools provided in the embodiments of this application;

[0040] Figure 3 This is a schematic diagram of the slide groove of the automatic tool setting and calibration device for a multi-axis linkage machine tool provided in the embodiments of this application;

[0041] Figure 4 A schematic diagram of the slide plate of the automatic tool setting and calibration device for a multi-axis linkage machine tool provided in the embodiments of this application.

[0042] The text labels in the figure are as follows: 100-base; 110-slide plate; 120-first linear guide slider; 121-first slide rail; 130-second linear guide slider; 131-second slide rail; 200-tool setter; 210-laser rangefinder sensor; 300-tool setter; 310-connection rod; 320-connection frame; 321-support spring; 322-fixed slider; 323-level tube; 330-slide groove; 340-reflector. Detailed Implementation

[0043] To enable those skilled in the art to better understand the technical solution of this application, the application will be described in detail below with reference to the accompanying drawings. The description in this section is only exemplary and explanatory, and should not be used to limit the scope of protection of this application.

[0044] Please refer to Figure 1-4 This embodiment provides an automatic tool setting and calibration device for a multi-axis linkage machine tool, including a base 100. A tool setting device 200 and a tool setting holder 300 are respectively mounted on the base 100 for fixed connection to the machine tool worktable. The tool setting device 200 is fixedly mounted on the base 100, with a retractable tool setting probe at the top and laser rangefinders 210 arranged in a cross direction on the outer side of the bottom. The tool setting holder 300 is slidably mounted on the base 100, forming a nested installation structure with the tool setting device 200. A docking mechanism is also included. The docking mechanism is installed on the top of the tool setter 300, including a docking rod 310 that can be raised and lowered on the tool setter 300; the top of the docking rod 310 is provided with a matching docking groove corresponding to the tool head, and is connected to the tool setter 300 through a docking frame 320; the opening end of the docking groove is flared, for automatic alignment with the tool head; the docking frame 320 is raised and lowered on the tool setter 300, and a support spring 321 is also provided between the docking frame 320 and the tool setter 300 for driving the docking rod 310 to automatically dock with the tool head.

[0045] In this embodiment, the tool setter 200 is tightly fixed at a specific position on the base 100. The retractable tool setter probe at its top is made of high-hardness alloy material, which has high wear resistance and precision retention. The laser rangefinders 210 arranged along the cross direction on the bottom outer side of the tool setter 200 are high-precision models with a measurement accuracy of ±0.001mm. The installation positions of these laser rangefinders 210 are precisely calibrated to ensure accurate measurement of the displacement of the tool setter 300 in the X and Y axis directions.

[0046] In this embodiment, the docking rod 310 can be lifted and installed on the tool holder 300. It can effectively dock with the tool head and automatically align itself through the funnel-shaped docking groove at the top. With the support of the support spring, it can ensure the precise fit between the tool head and the docking rod 310.

[0047] In this embodiment, during the docking process between the docking rod 310 and the tool head, the tool holder 300 will also move accordingly, thereby effectively detecting the positional deviation of the tool head along the X and Y axes using a laser rangefinder; then, through the displacement in the Z direction, the docking rod 310 is docked with the tool setter 200, which can also effectively detect the deviation in the Z axis direction.

[0048] In a preferred embodiment, the tool setting holder 300 is connected to the base 100 via a slide plate 110; the slide plate 110 is connected to the base 100 via a first linear guide slider 120, and a matching through square hole is provided in the middle corresponding to the tool setting device 200; the base 100 is provided with a matching first slide rail 121 corresponding to the first linear guide slider 120, for forming a sliding connection with the slide plate 110.

[0049] In this embodiment, the slide plate 110 between the tool holder 300 and the base 100 is made of aluminum alloy, which ensures sufficient strength and reduces the overall weight. The slide plate 110 and the base 100 are connected by a first linear guide slider 120. The slider part of the first linear guide slider 120 is fixed to the bottom of the slide plate 110, and the guide part, namely the first slide rail 121, is installed on the base 100. The surface of the first slide rail 121 is treated with high precision grinding, so that the sliding is smooth and can effectively reduce the friction and shaking of the slide plate 110 during the sliding process. The size of the through square hole of the tool setter 200 in the middle of the slide plate 110 is precisely designed to ensure that the tool setter 200 will not interfere with the sliding of the slide plate 110.

[0050] In a preferred embodiment, the tool setter 300 and the slide plate 110 are connected by a second linear guide slider 130; the second linear guide slider 130 is fixedly installed on the tool setter 300, and its sliding direction is perpendicular to the sliding direction of the first linear guide slider 120; the slide plate 110 is provided with a matching second slide rail 131 corresponding to the second linear guide slider 130, for forming a sliding connection with the tool setter 300.

[0051] In this embodiment, the tool holder 300 and the slide plate 110 are connected by a second linear guide slider 130. The slider of the second linear guide slider 130 is fixed to the bottom of the tool holder 300, and its sliding direction is perpendicular to the sliding direction of the first linear guide slider 120. The second slide rail 131 on the slide plate 110 corresponding to the second linear guide slider 130 is also machined with high precision to ensure the sliding accuracy of the tool holder 300 in two mutually perpendicular directions.

[0052] In a preferred embodiment, the docking frame 320 is cross-shaped, with fixed sliders 322 installed at each of its four ends for sliding connection with the tool setting holder 300; the tool setting holder 300 is provided with matching grooves 330 corresponding to the fixed sliders 322; the support spring 321 is installed in the grooves 330, located below the fixed sliders 322, for supporting and resetting the fixed sliders 322.

[0053] In this embodiment, the docking frame 320 in the docking mechanism is cross-shaped and made of stainless steel, which has good rigidity and corrosion resistance. The fixed sliders 322 installed at the four ends respectively match the slide grooves 330 on the tool holder 300 with high precision, ensuring the stability of the docking frame 320 during the lifting process. The support spring 321 is made of high-quality spring steel, and its elastic coefficient has been accurately calculated to provide appropriate elastic force, drive the docking rod 310 to automatically dock with the tool head, and ensure the tightness of the docking after docking.

[0054] In a preferred embodiment, the docking frame 320 is further provided with a level tube 323; the number of the level tubes 323 includes four, which are respectively installed on the four extension arms of the docking frame 320, and are used to detect the levelness of the docking frame 320 and the installation levelness of the base 100.

[0055] In this embodiment, the four level tubes 323 on the docking frame 320 are installed in accurate positions, which can detect the levelness of the docking frame 320 and the installation levelness of the base 100 in real time. Once the levelness deviation is found to exceed the allowable range, it can be adjusted in time to ensure the tool setting accuracy.

[0056] In a preferred embodiment, the docking frame 320 and the docking rod 310 are fixedly connected; the docking rod 310 is located in the middle of the docking frame 320 and passes through the docking frame 320 in a vertical direction; the docking groove is located above the docking frame 320 and is used to dock with the cutting head; the end of the docking rod 310 away from the docking groove is located below the docking frame 320 and is used to dock with the probe.

[0057] In this embodiment, the docking rod 310 and the docking frame 320 are fixedly connected by welding to ensure the connection is firm. The docking rod 310 is located in the middle of the docking frame 320 and passes through the docking frame 320 in a vertical direction. The docking groove is located above the docking frame 320, and its flared opening size is optimized according to the shape and size of common tool heads, which can quickly and accurately realize the automatic alignment of the tool and the tool setter. The end of the docking rod 310 away from the docking groove is located below the docking frame 320, which facilitates docking with the probe of the tool setter.

[0058] In a preferred embodiment, the tool setting holder 300 is further provided with a reflector 340 corresponding to the laser rangefinder 210, for detecting the displacement of the tool setting holder 300 relative to the tool setting device 200.

[0059] In this embodiment, the reflector 340 on the tool holder 300 corresponding to the laser rangefinder 210 is made of a high-reflectivity metal material and its surface is polished, which can effectively improve the accuracy of the laser rangefinder 210 in detecting the displacement of the tool holder 300 relative to the tool setter 200.

[0060] In actual use, the automatic tool setting calibration device for the multi-axis linkage machine tool is first installed on the machine tool worktable. The level of the base 100 is adjusted by the level tube 323 to ensure that the device is in a horizontal state. Then, the tool to be set is installed on the machine tool spindle, and the machine tool is started to move the tool to the tool setting position. At this time, the docking rod 310, under the action of the support spring 321, can be aligned with the tool head by cooperating with the docking groove. As the tool descends further, the docking rod 310 also descends and docks with the probe on the tool setting instrument 200. At the same time, the laser range sensor 210 also starts to work, detecting the displacement of the tool setting holder 300 relative to the tool setting instrument 200 in the X and Y axis directions. Combined with the detection of the tool's position in the Z axis direction by the tool setting instrument 200, the position deviation of the tool in the X, Y, and Z axis directions can be obtained synchronously. Based on these deviation data, the machine tool control system automatically calculates and generates the tool compensation value to complete the tool setting calibration operation.

[0061] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. The above descriptions are only preferred embodiments of this application. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of this application.

Claims

1. An automatic tool setting and calibration device for a multi-axis linkage machine tool, characterized in that, include A base (100) is provided with a tool setting device (200) and a tool setting holder (300) for fixed connection with the machine tool worktable; The tool setting device (200) is fixedly installed on the base (100), with a retractable tool setting probe on the top and a laser range sensor (210) arranged in a cross direction on the outer side of the bottom. The tool setting holder (300) is slidably mounted on the base (100), forming a nested installation structure with the tool setting device (200); A docking mechanism, which is mounted on top of the tool holder (300), includes a docking rod (310) that is liftably mounted on the tool holder (300). The top of the docking rod (310) is provided with a matching docking groove corresponding to the cutter head, and is connected to the cutter holder (300) through a docking bracket (320); The opening end of the docking groove is flared to automatically align with the cutting head; The docking frame (320) can be lifted and installed on the tool setting frame (300), and a support spring (321) is provided between it and the tool setting frame (300) to drive the docking rod (310) to automatically dock with the tool head.

2. The automatic tool setting and calibration device for multi-axis linkage machine tools according to claim 1, characterized in that, The tool holder (300) and the base (100) are connected by a sliding plate (110); The slide plate (110) is connected to the base (100) by a first linear guide slider (120), and a matching through square hole is provided in the middle corresponding to the tool setter (200); The base (100) is provided with a matching first slide rail (121) corresponding to the first linear guide slider (120), which is used to form a sliding connection with the slide plate (110).

3. The automatic tool setting and calibration device for a multi-axis linkage machine tool according to claim 2, characterized in that, The tool holder (300) and the slide plate (110) are connected by a second linear guide slider (130); The second linear guide slider (130) is fixedly mounted on the tool holder (300), and its sliding direction is perpendicular to the sliding direction of the first linear guide slider (120); The slide plate (110) is provided with a matching second slide rail (131) corresponding to the second linear guide slider (130), which is used to form a sliding connection with the tool holder (300).

4. The automatic tool setting and calibration device for a multi-axis linkage machine tool according to claim 1, characterized in that, The docking frame (320) is cross-shaped, and fixed sliders (322) are installed at its four ends for sliding connection with the tool holder (300); The tool holder (300) is provided with matching grooves (330) corresponding to the fixed slider (322); The support spring (321) is installed in the groove (330) and located below the fixed slider (322) to support and reset the fixed slider (322).

5. The automatic tool setting and calibration device for a multi-axis linkage machine tool according to claim 4, characterized in that, The docking frame (320) is also equipped with a level tube (323); The number of the level tubes (323) includes four, which are respectively installed on the four extension arms of the docking frame (320) for detecting the levelness of the docking frame (320) and the installation levelness of the base (100).

6. The automatic tool setting and calibration device for a multi-axis linkage machine tool according to claim 4, characterized in that, The docking frame (320) is fixedly connected to the docking rod (310); The docking rod (310) is located in the middle of the docking frame (320) and passes through the docking frame (320) in the vertical direction. The docking groove is located above the docking frame (320) and is used to dock with the cutting head; The end of the docking rod (310) away from the docking groove is located below the docking frame (320) and is used to dock with the probe.

7. The automatic tool setting and calibration device for a multi-axis linkage machine tool according to claim 1, characterized in that, The tool setting holder (300) is also provided with a reflector (340) corresponding to the laser rangefinder (210), which is used to detect the displacement of the tool setting holder (300) relative to the tool setting instrument (200).

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