Tool for calibrating ATC tool changing position

Abstract

The utility model discloses a tool used for calibrating ATC tool changing position, comprising a ring gauge, a standard shaft, a fixed core knife handle, a shaft and a dial indicator, the fixed core knife handle is connected with the shaft, the shaft and the standard shaft can be coaxially inserted into the ring gauge, the ring gauge is provided with a dial indicator calibration hole, and the dial indicator can be inserted into the dial indicator calibration hole. According to the tool, the three dial gauges arranged in the three-axis direction are calibrated firstly, then the ring gauge of the tool is installed in the ATC mechanical arm clamping mechanism, the whole of the centering cutter handle and the shaft is installed in the machine tool spindle, then the shaft is inserted into the ring gauge, and coaxial calibration is conducted on the positions of the machine tool ATC mechanical arm and the spindle through the calibrated dial gauges. The device is reasonable in structural design, simple and convenient to use and operate, capable of quantification, high in calibration precision and high in efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of numerical control machining, in particular to a tool used for calibrating an ATC tool changing position. Background Art

[0002] The CNC machining center is a CNC machine tool with a tool magazine and an automatic tool changer. The automatic tool changer (ATC) is an important actuator of the CNC machine tool. It is responsible for realizing the tool change requirements of continuous processing between parts and processes. After each process is completed, it can automatically replace the new tool required for the next process on the spindle, thereby ensuring the process characteristics of the machining center's process concentration. When debugging the machine tool, the tool change position needs to be calibrated to ensure that the machine tool can complete the tool change process normally and stably. However, the calibration of existing technologies is mostly done by human observation, which cannot be quantified and has low calibration accuracy. Utility Model Content

[0003] In view of the above problems, the utility model provides a tool for calibrating the ATC tool changing position, which has reasonable design, simple operation and good use effect.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A tool for calibrating an ATC tool change position comprises a ring gauge, a standard shaft, a centering tool handle, a shaft, and a dial indicator. The centering tool handle is connected to the shaft, and the shaft and the standard shaft can be coaxially inserted into the ring gauge. A dial indicator calibration hole is provided on the ring gauge, and the dial indicator can be inserted into the dial indicator calibration hole.

[0006] As a preferred embodiment of the above scheme, the centering tool handle and the shaft are interference fit to form a whole, and the diameter of the shaft is consistent with that of the standard shaft.

[0007] As a preferred embodiment of the above solution, a gasket is provided between the centering tool handle and the ring gauge.

[0008] As a preferred embodiment of the above solution, a flat head set screw is provided on the ring gauge.

[0009] As a preferred embodiment of the above scheme, there are three dial indicator calibration holes, which are arranged vertically in pairs along the three-axis directions.

[0010] Due to the above structure, the beneficial effects of the utility model are:

[0011] The tooling of the present application first calibrates the three dial indicators arranged along the three-axis direction, then installs the ring gauge of the tooling in the clamping mechanism of the ATC manipulator, installs the centering tool handle and the shaft as a whole in the machine tool spindle, then inserts the shaft into the ring gauge, and coaxially calibrates the position of the machine tool ATC manipulator and the spindle through the calibrated dial indicator. The structure design is reasonable, the operation is simple, the calibration can be quantified, the calibration accuracy is high, and the efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the drawings required for describing the embodiments are briefly introduced below.

[0013] Figure 1 It is a schematic diagram of the structure of the utility model when calibrating a radially arranged dial indicator;

[0014] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure of;

[0015] Figure 3 It is a schematic diagram of the structure of the utility model when calibrating an axially arranged dial indicator;

[0016] Figure 4 for Figure 3 A schematic diagram of the cross-sectional structure of;

[0017] Figure 5 This is a schematic diagram of the structure of the machining center tool installed on the machine tool spindle. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings of the utility model to clearly and completely describe the technical solution of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] Please refer to 1 to Figure 5 .

[0020] The present embodiment provides a tooling for calibrating the ATC tool changing position, comprising a ring gauge 2, a standard shaft 1, a centering tool handle 5, a shaft 6, and a dial indicator 3. The centering tool handle 5 is connected to the shaft 6. The shaft 5 and the standard shaft 1 can be coaxially inserted into the ring gauge 2. A dial indicator calibration hole is provided on the ring gauge 2, and the dial indicator 3 can be inserted into the dial indicator calibration hole.

[0021] In this embodiment, the centering tool handle 5 and the shaft 6 are interference fit to form a whole and will not be disassembled during normal use, so they can be regarded as one part. The diameter of the shaft 6 is consistent with the diameter tolerance of the calibration shaft 1 here, and is ground to be as consistent as possible in diameter.

[0022] In this embodiment, a gasket 7 is provided between the centering handle 5 and the ring gauge 2. The design size of the gasket 7 is based on the size from the center of the V-groove of the ring gauge 2 to the reference end face of the centering handle 5 being exactly equal to the size 18 of the standard HSK-A63.

[0023] In this embodiment, a flat head set screw 4 is provided on the ring gauge 2 .

[0024] In this embodiment, there are three dial indicator calibration holes, which are arranged vertically in pairs along the three-axis directions, so that the tool change (xyz) position can be confirmed more intuitively and accurately.

[0025] The working principle of the above structure:

[0026] When applying, you first need to calibrate the dial indicator as follows:

[0027] (1) Calibration of two radial dial indicators:

[0028] like Figure 1 , Figure 2 As shown, insert the calibration shaft 1 into the ring gauge 2, then loosen the two set screws 4, insert two dial indicators 3 into the radial dial indicator calibration holes, slowly move the dial indicators 3 downwards, make the dial tips contact the calibration shaft 1 and press down 0.5mm, then tighten the set screws 4 to fix the dial indicators 3, and turn the dial to make the needle point to 0. Remove the calibration shaft 1, and the calibration of the two radially arranged dial indicators 3 is completed (do not turn the dial of the dial indicator again).

[0029] (2) Calibration of an axial dial indicator:

[0030] like Figure 3 , Figure 4 As shown, assemble the centering handle 5, shaft 6, ring gauge 2 and two gaskets 7, insert the third dial gauge 3 into the axial dial gauge calibration hole of the ring gauge 2, and press the ring gauge 2 by hand to make the three fully contact without gap. Slowly move the dial gauge 2 downwards, make the tip of the dial contact the plane of the centering handle 5 and press down 0.5mm, then tighten the set screw 4 to fix the dial gauge 3, and turn the dial so that the needle points to 0. The calibration of the axially arranged dial gauge is completed (also do not turn the dial of the dial gauge again).

[0031] Then you can use this tool to calibrate the ATC tool change position:

[0032] Taking the A51NX horizontal machining center of Makino Automotive Equipment (Wuhan) Co., Ltd. as an example, the ring gauge 2 with three dial indicators 3 is installed in the clamping mechanism of the ATC robot arm, the centering tool handle 5 and the shaft 6 are installed as a whole in the machine tool spindle (at this time, the gasket 7 and the calibration shaft 1 are no longer needed), and the shaft 6 is inserted into the ring gauge 2.

[0033] Move the XY axis of the machine tool until the readings of the two radial dial indicators are both 0 (press down 0.5mm), and check whether the axial dial indicator reading of the ATC in the tool change position is -0.25mm (press down 0.25mm). If not, adjust the axial position of the ATC arm until the axial dial indicator reading is -0.25mm. At this time, each position is the best position for tool change.

[0034] The following explains why the axial micrometer is -0.25mm:

[0035] like Figure 5 As shown in the figure, because the HSK63 tool holder 8 is in an over-positioning state after being loaded into the machine tool spindle and tightened, the tool holder reference end face is in full contact with the machine tool spindle end face, and the tool holder conical surface is also elastically deformed and fully in contact with the machine tool spindle conical hole. When the tool is released, the front end of the pull rod extends and contacts the tool holder, and will continue to push forward 0.5mm. The 6 claws are closed due to the action of the spring. The extra 0.5mm will overcome the self-locking state caused by the elastic deformation of the tool holder and kick the tool holder out. Therefore, it can be concluded that when the tool is locked and released, the tool holder will have an axial displacement of 0.5mm relative to the machine tool spindle. Since the axial degree of freedom of the ATC arm is in a restricted state when interacting with the machine tool spindle at this time (the plane cam is in the rest area at this time), this 0.5mm displacement can only be absorbed by the elastic deformation or clearance of the ATC arm. Therefore, we deform the ATC arm forward by 0.25mm when the tool is released and deform the ATC arm backward by 0.25mm when the tool is locked, so that the stress on the ATC arm is minimized.

[0036] It should be noted that this tooling can also be used for machine tools without ATC arms. After the machine tool calibration is completed, check the readings of the three dial indicators according to the previous radial calibration and axial calibration dial indicator methods. If they are all 0 (press down 0.5mm), it means that the dials of the three dial indicators have not rotated during the process, and the entire machine tool calibration process is correct and valid.

[0037] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A tool for calibrating the ATC tool change position, characterized in that: The invention comprises a ring gauge, a standard shaft, a centering tool handle, a shaft and a dial indicator. The centering tool handle is connected with the shaft. The shaft and the standard shaft can be coaxially inserted into the ring gauge. The ring gauge is provided with a dial indicator calibration hole, and the dial indicator can be inserted into the dial indicator calibration hole.

2. The tooling for calibrating the ATC tool change position according to claim 1, characterized in that: The centering tool handle and the shaft are interference fit to form a whole, and the diameter of the shaft is consistent with that of the standard shaft.

3. The tooling for calibrating the ATC tool change position according to claim 1, characterized in that: A gasket is arranged between the centering tool handle and the ring gauge.

4. The tooling for calibrating the ATC tool change position according to claim 1, characterized in that: The ring gauge is provided with a flat head set screw.

5. The tooling for calibrating the ATC tool change position according to claim 1, characterized in that: The dial indicator calibration holes are provided with three holes, which are arranged vertically in pairs along the three-axis directions.

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