CN116038548A - Electric protection control strategy for honing tool - Google Patents

Abstract

A strategy for electric protection control of honing tools belongs to the technical field of control and use of electromechanical matching of numerical control machine tools. The mechanically upper honing tool is arranged on the main shaft; after the main shaft rotates steadily on the processing technology, the vertical shaft descends to carry out honing processing; the servo feeding or hydraulic connection vertical reciprocating system is electrically adopted to control reciprocating stroke, noise is reduced, custom storage parameters are utilized, servo state data resources are monitored, and hardware such as a cutter is protected according to the processing technology executing step through judging the data. The invention has the advantages that: according to the combination of the strategy and the built-in PLC program, the shaft output torque, the application system function and related parameters are determined by combining the mechanical design and the machining process, and the torque data is monitored and judged, so that the functional requirements of different systems can be safely and reliably met.

Description

Electric protection control strategy for honing tool

Technical Field

The invention relates to a strategy for protecting and controlling a cutter by combining a PLC and a machining program, and belongs to the technical field of control and use of electromechanical matching of a machine tool.

Background

The tool is frequently fallen off in the honing tool processing, or the tool and the workpiece are damaged due to the problems of the fixture position deviation, the workpiece allowance shortage and the like, particularly, the tool is damaged in the subsequent station because the honing processing is mainly multi-station sequential processing, the workpiece size is processed by the prior tool, and the like. The cutter is easy to fall off, so that damage is obvious in automatic processing, and the cutter is hard collided in the rotating process of the turntable after the cutter falls off, so that a plurality of cutters are damaged simultaneously. Based on this background, tool protection control is used.

Disclosure of Invention

In order to improve the use efficiency of honing tools, the invention provides a strategy for performing tool protection control by combining a PLC and a processing program.

A strategy for combining a PLC and a machining program to perform tool protection control comprises the following steps; and utilizing the custom storage parameters, the monitoring state data resources, the coordinate axes and the identification of the PLC signal state, and carrying out the protection of hardware such as a cutter according to the execution step of the honing process by analyzing and judging the data.

The invention has the advantages that: according to the combination of the strategy and the built-in PLC program of the system, after the machine finds out the coordinate data of a specific working shaft, the system function and related parameters are applied, the data are judged and acted on each coordinate axis, and the system can be implemented according to the monitoring and using strategies only according to the system resources without adding additional hardware, so that a satisfactory effect is obtained.

Drawings

The invention, together with a further understanding of the many of its attendant advantages, will be best understood by reference to the following detailed description, when considered in conjunction with the accompanying drawings, which are included to provide a further understanding of the invention, and the accompanying drawings, illustrate and describe the invention and do not constitute a limitation to the invention, and wherein:

FIG. 1 is a flow chart of the present invention.

The invention will be further described with reference to the drawings and examples.

Detailed Description

It will be apparent that many modifications and variations are possible within the scope of the invention, as will be apparent to those skilled in the art based upon the teachings herein.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element or component is referred to as being "connected" to another element or component, it can be directly connected to the other element or component or intervening elements or components may also be present. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art.

Example 1: as shown in FIG. 1, the invention provides a strategy for combining a PLC and a machining program to perform tool protection control, which comprises the following steps of reading the current tool torque through a PLC program built in a system and performing safety protection treatment.

The PLC and the machining program are combined to carry out a strategy of cutter protection control, and the method is characterized in that the state of the cutter is judged by the torque of the main shaft through the PLC, and the method accords with the current international programming concept, and comprises the following steps:

step 1, according to the requirements of a processing technology, a torque minimum value in motion and a torque maximum value in processing can be set;

step 2, starting servo spindle torque judgment in the vertical axis moving process;

step 3, starting servo spindle torque judgment in the vertical axis machining process;

step 4, starting a torque protection program through the torque change of the main shaft;

step 5, finishing the withdrawal of the vertical machining shaft to the machining starting point after the normal torque of the main shaft;

step 6, generating an alarm through a three-time torque judging system when the torque of the main shaft is abnormal, and stopping processing;

the specific steps are as follows:

(1) Torque setting screen

The torque multiplying power is used for detecting the torque in no-load condition, the torque change difference is small when the spindle rotates in no-load condition, and the output torque needs to be amplified as a judgment basis; the slight alarm and the serious alarm are used as alarm bases for judging whether the vertical shaft retreats and reprocessing or stopping after the torque of the cutter is out of tolerance;

(2) The PLC reads the average torque address, and the average torque value provided by the system is used in the reading process without adopting the maximum torque value, so that the data monitoring is more stable, and the false alarm is reduced;

(3) PLC programming process-torque alarm (basic example);

(4) PLC programming process-second start after torque alarm (basic example).

As described above, the embodiments of the present invention have been described in detail, but it will be apparent to those skilled in the art that many modifications can be made without departing from the spirit and effect of the present invention. Accordingly, such modifications are also entirely within the scope of the present invention.

Claims (4)

1. A strategy for electric protection control of a honing cutter, wherein the honing cutter is mechanically arranged on a main shaft; after the main shaft rotates steadily on the processing technology, the vertical shaft descends to carry out honing processing; the servo feeding or hydraulic connection vertical reciprocating system is electrically adopted to control reciprocating stroke, noise is reduced, custom storage parameters are utilized, servo state data resources are monitored, and hardware such as a cutter is protected according to the processing technology executing step through judging the data.

2. A strategy for performing electrical protection control based on a combination of a PLC and a machining program, wherein the use of a system function program comprises: setting defined parameters, reading conversion and function application conditions;

starting a machining program: when the system receives the work of the machine tool part, the servo spindle rotates;

machining tool detection 1: judging whether the torque of the servo spindle is smaller than the minimum torque after the vertical axis reaches the processing point, if so, judging that the spindle is in a rotating error or the spindle has no tool (such as a tool falls off, etc.), and stopping processing;

machining tool detection 2: judging whether the torque of the servo spindle is larger than the maximum torque or not during the machining movement of the vertical shaft, if yes, judging that the spindle is in rotation error or the cutter is in machining abnormality for the first time, machining again and detecting after the vertical shaft is in back-off for the first time, if yes, judging that the spindle is in rotation error or the cutter is in machining abnormality for the second time, machining again and detecting after the vertical shaft is in back-off for the second time, if yes, judging that the spindle is in rotation error or the cutter is in machining abnormality for the third time, and stopping machining.

3. The combination of PLC and process program as claimed in claim 1, wherein each servo spindle process and torque during process determination is performed during the program process.

4. The strategy of combining PLC and machining program for machining control according to claim 1, wherein in addition to the judgment of PLC program, combining PLC function and program, combining PLC system and motion positioning module, each spindle action torque condition can be written freely, flexible and convenient to program, and the method conforms to the present international programming concept, the steps are:

step 1, according to the requirements of a processing technology, a torque minimum value in motion and a torque maximum value in processing can be set;

step 2, starting servo spindle torque judgment in the vertical axis moving process;

step 3, starting servo spindle torque judgment in the vertical axis machining process;

step 4, starting a torque protection program through the torque change of the main shaft;

step 5, finishing the withdrawal of the vertical machining shaft to the machining starting point after the normal torque of the main shaft;

step 6, generating an alarm through a three-time torque judging system when the torque of the main shaft is abnormal, and stopping processing;

according to the flow, the method can be applied to different system conditions of machine tool configuration, and can be implemented according to the monitoring and using strategies only according to system resources without adding additional hardware, thereby obtaining satisfactory effects.

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