Numerical control machine tool cutter wear detection device

Abstract

The utility model relates to the technical field of cutter wear detection, and provides a cutter wear detection device for a numerical control machine tool. The linear guide rail is mounted on the base; the sliding block module is in sliding connection with the linear guide rail; the lead screw and the lead screw nut are arranged in a matched mode, the lead screw nut is installed in the sliding block module, and the lead screw is installed on the base; the servo motor and the coupler are connected in a matched mode and installed on the base, and the coupler is connected with the lead screw; the detection rod is mounted on the sliding block module; the detection switch is mounted at the end part of the detection rod; and the servo motor and the detection switch are respectively in communication connection with the control system. The tool magazine disc tool sleeve moves upwards, the servo motor controls the detection rod to stretch out, and the detection switch carries out tool abrasion detection and then retreats. Through the technical scheme of the utility model, the detection cost is low, the detection efficiency is high, the automatic online real-time detection of the cutter can be realized, the processing rhythm is not occupied, the detection of the cutter is not influenced in the processing process, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tool wear detection, in particular to a tool wear detection device for a numerical control machine tool. Background Art

[0002] In the precision machining process of CNC machine tools, it is generally necessary to detect the wear of the tool. In related technologies, the detection is generally carried out inside the equipment warehouse, by touching the travel switch or proximity switch through the movement of each axis of the machine tool; or a separate PMC axis is added to the CNC system, and the detection is carried out inside the tool magazine warehouse through the servo axis. There are the following technical defects:

[0003] (1) Detection is performed inside the equipment compartment. The machine tool axes are moved to touch the travel switch or proximity switch. Although the control is simple and the cost is low, it is greatly affected by factors such as cutting fluid and aluminum chips, and is prone to false detection and missed detection.

[0004] (2) Adding a separate PMC axis to the CNC system and performing detection inside the tool magazine through the servo axis has a high investment cost. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art or related technology.

[0006] To this end, the purpose of the utility model is to provide a tool wear detection device for CNC machine tools, which uses an externally controlled servo motor for detection, has low detection cost and high detection efficiency, can realize automatic online real-time detection of tools, does not occupy the processing cycle, does not affect the detection of tools during the processing, and is conducive to improving production efficiency.

[0007] In order to achieve the above-mentioned purpose, the technical solution of the utility model provides a tool wear detection device for a CNC machine tool, comprising: a base; a linear guide rail installed on the base; a slider module slidably connected to the linear guide rail; a screw rod and a screw rod nut arranged in conjunction with each other, the screw rod nut being installed in the slider module, and the screw rod being installed on the base; a servo motor and a coupling arranged in conjunction with each other, which are installed on the base, and the coupling is connected to the screw rod; a detection rod, which is installed on the slider module; a detection switch, which is installed at the end of the detection rod; the servo motor and the detection switch are respectively connected to the control system for communication.

[0008] There are multiple tool pockets on the tool magazine disc, and tools are placed in each pocket. When the spindle tool processing is completed, the tool change command is executed. After the tool change is completed and the next tool is called, the tool pocket of the tool magazine disc moves upward, and the servo motor controls the detection rod to extend. After the tool wear is detected by the detection switch, it retracts, and the tool magazine disc continues to rotate to call the next tool.

[0009] Preferably, the tool wear detection device for CNC machine tools further comprises: an origin switch and a limit switch which are arranged at intervals and are respectively installed at two ends of the base.

[0010] Preferably, the origin switch and the limit switch are both proximity switches.

[0011] Preferably, the detection switch is a proximity switch.

[0012] Preferably, the length of the detection rod is greater than the distance between the origin switch and the limit switch.

[0013] Preferably, the detection rod is a straight rod or a Z-shaped rod.

[0014] The utility model provides a CNC machine tool tool wear detection device with the following beneficial technical effects:

[0015] (1) The tool wear detection device for a CNC machine tool proposed in the utility model uses an externally controlled servo motor for detection, which has low detection cost and high detection efficiency.

[0016] (2) The utility model proposes a tool wear detection device for CNC machine tools, which can realize automatic online real-time detection of tools, avoiding the influence of factors that cannot be controlled by personnel. At the same time, the detection device does not occupy the processing cycle and does not affect the detection of tools during the processing, thereby improving production efficiency.

[0017] (3) The tool wear detection device for CNC machine tools proposed by the utility model can be used for tool fracture and wear detection of vertical or horizontal machining centers, which not only has low investment cost but also has high detection efficiency.

[0018] (4) The tool wear detection device for a CNC machine tool proposed in the utility model is provided with an origin switch and a limit switch, which can ensure that the moving range of the detection rod and the detection switch is within a controllable stroke, further ensuring the detection accuracy.

[0019] (5) The tool wear detection device for CNC machine tools proposed in the utility model can not only use the servo motor to move according to the call of corresponding tool length data, and after reaching the corresponding tool length position, determine whether the tool is worn according to whether the detection switch detects a signal; it can also use the servo motor to move and stop when the detection switch has a signal to realize the detection and storage of the tool length.

[0020] Additional aspects and advantages of the present invention will be given in the following description, and some will become apparent from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 A schematic structural diagram of a tool wear detection device for a CNC machine tool according to an embodiment of the utility model is shown;

[0023] Figure 2 A schematic diagram of the front view of a tool wear detection device for a CNC machine tool according to an embodiment of the utility model is shown;

[0024] Figure 3 A schematic diagram of the top view of a tool wear detection device for a CNC machine tool according to an embodiment of the utility model is shown;

[0025] Figure 4 The figure shows a schematic diagram of the structure of the tool wear detection device for CNC machine tools during the detection process according to an embodiment of the utility model.

[0026] in, Figures 1 to 4 The corresponding relationship between the reference numerals and the components is as follows:

[0027] 102 base, 104 linear guide, 106 slider module, 108 lead screw, 110 lead screw nut, 112 servo motor, 114 coupling, 116 detection rod, 118 detection switch, 120 origin switch, 122 limit switch;

[0028] 202 tool magazine tray, 204 tool sleeve, 206 tool. DETAILED DESCRIPTION

[0029] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0031] Combine the following Figures 1 to 4 A tool wear detection device for a numerically controlled machine tool according to an embodiment of the utility model is described in detail.

[0032] like Figures 1 to 4As shown, a tool wear detection device for a numerical control machine tool according to an embodiment of the utility model comprises: a base 102, a linear guide 104, a slider module 106, a screw 108, a screw nut 110, a servo motor 112, a coupling 114, a detection rod 116, a detection switch 118, etc. The linear guide 104 is mounted on the base 102. The slider module 106 is slidably connected with the linear guide 104, and the screw nut 110 is installed in the slider module 106. The screw 108 is mounted on the base 102 and cooperates with the screw nut 110 to realize the movement of the slider module 106. The servo motor 112 and the coupling 114 are mounted on the base 102, connected with the screw 108 through the coupling 114, drive the screw 108 to rotate, drive the screw nut 110 to move, and thus drive the slider module 106 and the detection rod 116 mounted thereon to move. The detection switch 118 is installed at the end of the detection rod 116, and the servo motor 112 and the detection switch 118 are respectively connected to the control system for communication, so that under the command of the control system, the displacement of the detection switch 118 can be controlled by the servo motor 112, and a signal can be fed back from the detection switch 118 to realize tool wear detection.

[0033] A plurality of tool pockets 204 are arranged on the tool magazine disc 202, and a tool 206 is placed in each tool pocket 204. When the spindle tool processing is completed and the tool change command is executed, the tool pocket 204 of the tool magazine disc 202 moves upward, and the servo motor 112 controls the detection rod 116 to extend, and the detection switch 118 is used to detect the tool wear and then retract it, and the tool magazine disc 202 continues to rotate to call the next tool 206. On the one hand, automatic online real-time detection of the tool can be realized, avoiding the influence of uncontrollable factors of personnel, and on the other hand, the detection device does not occupy the production and processing beat, and does not affect the detection of the tool during the processing, which is conducive to improving production efficiency.

[0034] Specifically, the CNC machine tool issues a tool call instruction and transmits the corresponding tool number data to the tool wear detection device. According to the tool number data, the corresponding tool sleeve 204 moves upward, and the servo motor 112 moves according to the corresponding tool length data. After reaching the corresponding tool length position, if the detection switch 118 has a signal, it is considered that the tool 206 is worn normally. Otherwise, the tool 206 is abnormally worn and an alarm is issued. After the detection is completed, the servo motor 112 drives the slider module 106, the detection rod 116, and the detection switch 118 to reset through the screw rod 108 and the screw nut 110. The tool magazine disk 202 continues to rotate to realize the next tool call.

[0035] The CNC machine tool issues a tool length detection command, the tool magazine disc 202, tool sleeve 204, tool number data are transmitted to the tool wear detection device, the tool sleeve 204 is upward, and the servo motor 112 controls the detection switch 118 to move. When the detection switch 118 has a signal, the servo motor 112 stops, and the current data is memorized and stored in the length data of the corresponding tool number. After the detection is completed, the servo motor 112 returns to its original position. The tool magazine disc 202 continues to rotate to realize the detection memory storage of the next tool until the detection memory storage of the specified tool length data is completed.

[0036] Furthermore, if Figures 1 to 3 As shown, the tool wear detection device for CNC machine tools further includes: an origin switch 120 and a limit switch 122 arranged at intervals, which are respectively installed at the two ends of the base 102. Thus, the movement of the detection switch 118 can be ensured to be within a controllable range, further improving safety and detection accuracy.

[0037] Furthermore, the origin switch 120, the limit switch 122, and the detection switch 118 are all proximity switches, which are easy to detect and have high accuracy.

[0038] Furthermore, the lead screw nut 110 is embedded in the slider module 106 , and the lead screw nut 110 can drive the slider module 106 to move synchronously, further ensuring accuracy.

[0039] Furthermore, the length of the detection rod 116 is greater than the distance between the origin switch 120 and the limit switch 122. Therefore, when the detection switch 118 is reset, it will not touch the limit switch 122 and will not be easily affected by external factors.

[0040] Furthermore, the detection rod 116 is a straight rod or a Z-shaped rod.

[0041] The working process of a tool wear detection device for CNC machine tools proposed by the utility model is as follows:

[0042] Tool wear detection: The CNC machine tool issues a tool call command and transmits the corresponding tool number data to the tool wear detection device. According to the tool number data, the corresponding tool sleeve 204 moves upward, and the servo motor 112 moves according to the corresponding tool length data. After reaching the corresponding tool length position, if the detection switch 118 has a signal, it is considered that the tool wear is normal. Otherwise, the tool wear is abnormal and an alarm is issued. After the detection is completed, the servo motor 112 drives the slider module 106, the detection rod 116, and the detection switch 118 to reset through the screw rod 108 and the screw nut 110. The tool magazine disk 202 continues to rotate to realize the next tool call.

[0043] Tool length memory storage: The CNC machine tool issues a tool length detection command, the tool magazine disc 202, tool sleeve 204, tool number data are transmitted to the tool wear detection device, the tool sleeve 204 is upward, and the servo motor 112 controls the detection switch 118 to move. When the detection switch 118 has a signal, the servo motor 112 stops, and the current data is memorized and stored in the length data of the corresponding tool number. After the detection is completed, the servo motor 112 returns to its original position. The tool magazine disc 202 continues to rotate to realize the detection memory storage of the next tool until the detection memory storage of the specified tool length data is completed.

[0044] In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0045] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as "up", "down", "left", "right", "front" and "back" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0046] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0047] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A CNC machine tool tool wear detection device, characterized in that: include: Base; A linear guide rail mounted on the base; A slider module slidably connected to the linear guide rail; A screw rod and a screw rod nut are arranged in cooperation, the screw rod nut is installed in the slider module, and the screw rod is installed on the base; a servo motor and a coupling are arranged in cooperation and are installed on the base, and the coupling is connected to the screw rod; a detection rod is installed on the slider module; a detection switch is installed at the end of the detection rod; the servo motor and the detection switch are respectively connected to the control system for communication, There are multiple tool pockets on the tool magazine disc, and tools are placed in each pocket. When the spindle tool processing is completed, the tool change command is executed. After the tool change is completed and the next tool is called, the tool pocket of the tool magazine disc moves upward, and the servo motor controls the detection rod to extend. After the tool wear is detected by the detection switch, it retracts, and the tool magazine disc continues to rotate to call the next tool.

2. The tool wear detection device for CNC machine tools according to claim 1, characterized in that: Also includes: The origin switch and the limit switch are arranged at intervals and are respectively installed at the two ends of the base.

3. The tool wear detection device for CNC machine tools according to claim 2, characterized in that: The origin switch and the limit switch are both proximity switches.

4. The tool wear detection device for CNC machine tools according to claim 1, characterized in that: The detection switch is a proximity switch.

5. The tool wear detection device for CNC machine tools according to claim 1, characterized in that: The screw nut is embedded in the slider module.

6. The tool wear detection device for CNC machine tools according to claim 2, characterized in that: The length of the detection rod is greater than the distance between the origin switch and the limit switch.

7. The tool wear detection device for CNC machine tools according to claim 6, characterized in that: The detection rod is a straight rod or a Z-shaped rod.

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