Method for detecting broken knife of engraving machine and frequency converter
A detection method and engraving machine technology, applied in the field of inverter control, can solve problems such as difficult detection, and achieve the effect of avoiding wasting time and improving processing efficiency.
Active Publication Date: 2019-06-04
SHENZHEN HPMONT TECH
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Problems solved by technology
[0005] Based on this, it is necessary to address the problem that the engraving machine is difficult to detect when the tool is damaged during the processing process, and provide a broken tool detection method and a frequency converter for the engraving machine that can effectively detect whether the tool is damaged during the high-speed engraving process.
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[0048] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.
[0050] The following provides a broken knife detection method of engraving machine, refer to figure 1 As shown, ...
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The invention relates to a tool breaking detection method of an engraving machine and a frequency converter. The tool breaking detection method of the engraving machine includes obtaining target frequency, and gradually increasing output frequency to target frequency after a frequency converter is started; after the output frequency of the frequency converter reaches the target frequency, detecting running current of a motor in real time; before receiving a tool feeding instruction, recording a first current value, and after receiving the tool feeding instruction, recording a second current value after executing the tool feeding instruction, wherein the second current value is larger than the first current value; in the process of executing the tool feeding instruction, continuously judging whether a decline satisfying a preset condition occurs in the running current; and if yes, determining that a tool breaking phenomenon occurs at the moment, and giving a tool breaking alarm after the tool breaking phenomenon occurs in the engraving machine. Thus the engraving machine can still effectively detect whether a tool is damaged in the high-speed engraving process, thereby preventing time from being wasted due to incapability of detecting the tool breaking phenomenon in a machining process, and improving machining efficiency.
Description
technical field [0001] The invention relates to the field of frequency converter control, in particular to a method for detecting a broken knife of an engraving machine and a frequency converter. Background technique [0002] The engraving machine is a commonly used processing equipment, which drives the tool through the high-speed rotating electric spindle, and engraves the target component into the desired shape or engraves the desired texture on the target component through the carving knife. The control system of the engraving machine is generally composed of a numerical control system, a frequency converter, and a high-speed electric spindle. [0003] Due to the high rotation speed of high-speed engraving machines, the rotation speed of the motorized spindle can usually reach tens of thousands of revolutions per minute. Therefore, it is easy to break the tool when encountering tool aging or uneven material density during processing. Since the processing of high-speed e...
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IPC IPC(8): G05B19/4065B44B1/06B44B3/06
CPCB44B1/06B44B3/06G05B19/4065G05B2219/37616
Inventor 张宁
Owner SHENZHEN HPMONT TECH