A method for improving the reliability of an automatic exchangeable swing head magazine of a five-axis machining center

Abstract

The present application belongs to the technical field of numerical control machine tools, and particularly relates to a method for improving the reliability of an automatic exchange swing head magazine of a five-axis machining center. The technical scheme of the present application is as follows: a method for improving the reliability of an automatic exchange swing head magazine of a five-axis machining center, comprising head returning logic control, head taking logic control, head position I anti-misplacement detection, head position II anti-misplacement detection, and head position III anti-misplacement detection; the head taking control logic and the head returning control logic cooperate with the head position I anti-misplacement detection, the head position II anti-misplacement detection, and the head position III anti-misplacement detection to complete the determination of the matching relationship of three A swings and the same C swing, and to verify the identification signals between the A swing and the C swing, so as to realize the accurate and reliable exchange of the swing head. The method for improving the reliability of an automatic exchange swing head magazine of a five-axis machining center provided by the present application can improve the reliability of the swing head exchange, reliably realize the automatic switching of different swing heads, avoid the exchange error of the swing head, and meet the processing requirements.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of numerical control machine tools, and particularly relates to a method for improving the reliability of an automatic exchange swing head turret of a five-axis machining center. BACKGROUND

[0002] Modern manufacturing has very high requirements in terms of automation level, production efficiency and reliability, especially in the field of aerospace, and multiple materials such as aluminum alloy, titanium alloy and composite material are integrated for the same part. In order to meet the high-efficiency machining requirements, the machine tool equipment is required to be equipped with multiple performance swing heads to meet the machining of different part positions and different part materials. At the same time, with the improvement of automation level, the multiple performance swing heads are required to realize automatic exchange function to avoid the problems of low efficiency and poor consistency of exchange accuracy when manually exchanging swing heads. At the same time, because the machined parts integrate multiple special measurements, they have the characteristics of high value, so the reliability of the exchangeable swing head must be guaranteed to avoid significant economic losses. SUMMARY

[0003] The application provides a method for improving the reliability of an automatic exchange swing head turret of a five-axis machining center, which can improve the reliability of swing head exchange, reliably realize automatic switching of different swing heads, avoid swing head exchange errors, and meet the machining requirements.

[0004] The technical scheme of the application is as follows:

[0005] A method for improving the reliability of an automatic exchange swing head turret of a five-axis machining center, comprising head returning logic control, head taking logic control, head position I anti-misplacement detection, head position II anti-misplacement detection and head position III anti-misplacement detection; the head taking control logic and the head returning control logic cooperate with the head position I anti-misplacement detection, the head position II anti-misplacement detection and the head position III anti-misplacement detection to complete the determination of the matching relationship between the three A swing heads and the same C swing head, and verify the identification signals between the A swing heads and the C swing head, so as to realize accurate and reliable swing head exchange.

[0006] Further, the method for improving the reliability of an automatic exchange swing head turret of a five-axis machining center comprises a turret support, three storage bodies, a supporting unit, a mounting frame, a position discrimination switch system and a mistake-proof detection switch system. The three storage bodies are installed side by side on the turret support, each storage body is provided with a supporting unit, and the position discrimination switch system and the mistake-proof detection switch system are respectively arranged at the three storage bodies through the mounting frame.

[0007] Further, the lifting five-axis machining center can automatically exchange the swing head library reliability method, the in-place discrimination switch system includes discrimination switch I, discrimination switch II and discrimination switch III, discrimination switch I, discrimination switch II and discrimination switch III adopt contact switch; the error-proof detection switch system includes error-proof detection switch I, error-proof detection switch II and error-proof detection switch III, error-proof detection switch I and error-proof detection switch II are long-stroke detection switches, adopt diffuse reflection photoelectric sensor, error-proof detection switch III is short-stroke detection switch, adopt conventional photoelectric sensor.

[0008] Further, the lifting five-axis machining center can automatically exchange the swing head library reliability method, discrimination switch I and error-proof detection switch I are arranged at the middle warehouse body as head position I, for placing swing head I; discrimination switch II and error-proof detection switch II are arranged at the left warehouse body as head position II, for placing swing head II; discrimination switch III and error-proof detection switch III are arranged at the right warehouse body as head position III, for placing swing head III.

[0009] Further, the lifting five-axis machining center can automatically exchange the swing head library reliability method, the head logic control is as follows:

[0010] When the system executes the head returning instruction, first, the in-machine swing head serial number is discriminated;

[0011] When the in-machine is swing head I, it needs to return to head position I, at this time, whether the head position I exists swing head is discriminated through discrimination switch I, when discrimination switch I signal is 1, it shows that the head position I exists swing head, error occurs, the system feedback alarm is needed, further checking discrimination switch and A, C swing matching signal is needed; when discrimination switch I signal is 0, it shows that the head position I has no head, head changing can be carried out; the next step is to carry out head position I error-proof detection;

[0012] When the in-machine is swing head II, it needs to return to head position II, at this time, whether the head position II exists swing head is discriminated through discrimination switch II, when discrimination switch II signal is 1, it shows that the head position II exists swing head, error occurs, the system feedback alarm is needed, further checking discrimination switch and A, C swing matching signal is needed; when discrimination switch II signal is 0, it shows that the head position II has no head, head changing can be carried out; the next step is to carry out head position II error-proof detection;

[0013] When the in-machine is swing head III, it needs to return to head position III, at this time, whether the head position III exists swing head is discriminated through discrimination switch III, when discrimination switch III signal is 1, it shows that the head position III exists swing head, error occurs, the system feedback alarm is needed, further checking discrimination switch and A, C swing matching signal is needed; when discrimination switch III signal is 0, it shows that the head position III has no head, head changing can be carried out; the next step is to carry out head position III error-proof detection.

[0014] Further, the method for improving the reliability of the automatic exchange of swing head magazines of the five-axis machining center can automatically exchange the swing head magazines, and the head taking logic control is as follows:

[0015] When the system executes the head taking instruction, the pre-fetch swing head number is determined first; the head number detection switch I is arranged in the swing head I, the head number detection switch II is arranged in the swing head II, and the head number detection switch III is arranged in the swing head III.

[0016] When the pre-fetch swing head I is taken, the discrimination switch I signal and the head number detection switch I signal need to be read; when the discrimination switch I signal is 1 and the head number detection switch I signal is 1, it is indicated that the head position I exists the swing head, and the swing head I is matched correctly, and the head taking can be performed; if the discrimination switch signal is 0 or the head number detection switch signal is 0, it is indicated that an error exists, and an alarm is given for troubleshooting.

[0017] When the pre-fetch swing head II is taken, the discrimination switch II signal and the head number detection switch II signal need to be read; when the discrimination switch II signal is 1, the head number detection switch II signal is 0, and the other discrimination switches and head number detection switches are normal, it is indicated that the head position II exists the swing head, and the swing head II is matched correctly, and the head taking can be performed; if the discrimination switch II signal is 0, the head number detection switch II signal is 1, or the other discrimination switches and head number detection switches are abnormal, it is indicated that an error exists, and an alarm is given for troubleshooting.

[0018] When the pre-fetch swing head III is taken, the discrimination switch III signal and the head number detection switch III signal need to be read; when the discrimination switch III signal is 1, the head number detection switch III signal is 0, and the other discrimination switches and head number detection switches are normal, it is indicated that the head position III exists the swing head, and the swing head III is matched correctly, and the head taking can be performed; if the discrimination switch III signal is 0, the head number detection switch III signal is 1, or the other discrimination switches and head number detection switches are abnormal, it is indicated that an error exists, and an alarm is given for troubleshooting.

[0019] Further, the method for improving the reliability of the automatic exchange of swing head magazines of the five-axis machining center can automatically exchange the swing head magazines, and the head taking logic control is as follows:

[0020] Further, the automatic exchange head library reliability method of the improved five-axis machining center can automatically exchange the head position II error detection as follows: in the case of judging switch II signal is 1, the error detection switch II signal is 1, which indicates that the head position II head matching error, the wrong head sequence number is 1; when the error detection switch II signal is 0, the head position II head sequence number needs to be further judged; the judgment is carried out through the judgment switch III, if the judgment switch III signal is 0 and the in-machine head is head II, it indicates that the head position II is wrong and the head III is placed; if the judgment switch III signal is 1, it indicates that the head position II head matching is correct, which is head II.

[0021] Further, the automatic exchange head library reliability method of the improved five-axis machining center can automatically exchange the head position III error detection as follows: in the case of judging switch III signal is 1, the error detection switch III signal is 0, which indicates that the head position III head matching error, the wrong head sequence number is 1; when the error detection switch III signal is 0, the head position II head sequence number needs to be further judged; the judgment is carried out through the judgment switch III, if the judgment switch III signal is 0 and the in-machine head is head II, it indicates that the head position II is wrong and the head III is placed; if the judgment switch III signal is 1, it indicates that the head position II head matching is correct, which is head II.

[0022] The beneficial effects of the present application are: the automatic exchange head exchange reliability can be improved, the problem of poor head exchange reliability when relying on single head A, C head exchange identification signal is avoided, the problem of head exchange error caused by incorrect or invalid head exchange identification signal is prevented; further, the risk of huge economic loss caused by head exchange error when processing high-value parts is avoided; the error detection method ensures the smooth implementation and actual application of the automatic head exchange function, and promotes the application of the five-axis machine tool equipment with automatic exchange head in the high-end field of aerospace and the like. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a schematic diagram of the automatic exchange head library;

[0024] Figure 2 It is a schematic diagram of placing three heads in the automatic exchange head library;

[0025] Figure 3 It is a head logic flow chart;

[0026] Figure 4 It is a head logic flow chart;

[0027] Figure 5 It is a head position I error detection logic flow chart;

[0028] Figure 6 It is a head position II error detection logic flow chart;

[0029] Figure 7This is the logic flowchart for the head-position III anti-misplacement detection. Detailed Implementation

[0030] like Figures 1-7 As shown, a method for improving the reliability of an automatically interchangeable head magazine in a five-axis machining center includes head return logic control, head retrieval logic control, head position I anti-misplacement detection, head position II anti-misplacement detection, and head position III anti-misplacement detection. The head retrieval control logic and the head return control logic, in conjunction with the head position I anti-misplacement detection, head position II anti-misplacement detection, and head position III anti-misplacement detection, complete the determination of the matching relationship between three A-type head magazines and the same C-type head magazine, and verify it with the identification signal between A and C-type head magazines to achieve accurate and reliable head exchange.

[0031] The automatic interchangeable head storage unit includes a head storage bracket 1, three compartments 2, a support unit 3, a mounting frame 4, a position discrimination switch system, and a mistake-proof detection switch system. The three compartments 2 are mounted side-by-side on the head storage bracket 1, and each compartment 2 contains a support unit 3. The position discrimination switch system and the mistake-proof detection switch system are respectively installed at the three compartments 2 via the mounting frame 4. The position discrimination switch system includes discrimination switch I5, discrimination switch II6, and discrimination switch III7, which are contact switches. The mistake-proof detection switch system... The system includes error-proof detection switches I8, II9, and III10. Error-proof detection switches I8 and II9 are long-stroke detection switches using diffuse reflection photoelectric sensors, while error-proof detection switch III10 is a short-stroke detection switch using a conventional photoelectric sensor. The diffuse reflection photoelectric sensor has a long and adjustable measurement stroke, making it highly adaptable to the appearance and size specifications of the oscillating head. The conventional photoelectric sensor is used for error-proof detection in head III, which is low-cost and reliable for error-proof detection in heads with significantly different appearances from the other two oscillating heads.

[0032] Discrimination switch I5 and error-proof detection switch I8 are set at the middle compartment 2 as head position I11, used to place the swing head I14; discrimination switch II6 and error-proof detection switch II9 are set at the left compartment 2 as head position II12, used to place the swing head II15; discrimination switch III7 and error-proof detection switch III10 are set at the right compartment 2 as head position III13, used to place the swing head III16.

[0033] The head-return logic control is as follows:

[0034] When the system executes the head return command, it first determines the in-machine swing head sequence number;

[0035] When the machine is swing head I, it needs to go to head position I to return the head, at this time, the discrimination switch I is used to discriminate whether there is swing head in head position I, when the discrimination switch I signal is 1, it shows that there is swing head in head position I, an error occurs, the feedback system alarms, and the discrimination switch and A, C swing matching signals need to be further checked; when the discrimination switch I signal is 0, it shows that there is no head in head position I, and the head can be changed; the next step is to perform head position I anti-misplacement detection.

[0036] When the machine is swing head II, it needs to go to head position II to return the head, at this time, the discrimination switch II is used to discriminate whether there is swing head in head position II, when the discrimination switch II signal is 1, it shows that there is swing head in head position II, an error occurs, the feedback system alarms, and the discrimination switch and A, C swing matching signals need to be further checked; when the discrimination switch II signal is 0, it shows that there is no head in head position II, and the head can be changed; the next step is to perform head position II anti-misplacement detection.

[0037] When the machine is swing head III, it needs to go to head position III to return the head, at this time, the discrimination switch III is used to discriminate whether there is swing head in head position III, when the discrimination switch III signal is 1, it shows that there is swing head in head position III, an error occurs, the feedback system alarms, and the discrimination switch and A, C swing matching signals need to be further checked; when the discrimination switch III signal is 0, it shows that there is no head in head position III, and the head can be changed; the next step is to perform head position III anti-misplacement detection.

[0038] The head taking logic control is as follows:

[0039] When the system executes the head taking instruction, the pre-taken swing head number is determined first; the head number detection switch I is arranged in swing head I, the head number detection switch II is arranged in swing head II, and the head number detection switch III is arranged in swing head III;

[0040] When swing head I is pre-taken, the discrimination switch I signal and the head number detection switch I signal need to be read, when the discrimination switch I signal is 1 and the head number detection switch I signal is 1, it shows that there is swing head in head position I, and it is swing head I, and the head can be taken; if the discrimination switch signal is 0 or the head number detection switch signal is 0, it shows that there is an error, and the alarm needs to be checked;

[0041] When swing head II is pre-taken, the discrimination switch II signal and the head number detection switch II signal need to be read, when the discrimination switch II signal is 1, the head number detection switch II signal is 0, and other discrimination switches and head number detection switches are normal, it shows that there is swing head in head position II, and it is swing head II, and the head can be taken; if the discrimination switch II signal is 0, the head number detection switch II signal is 1, or other discrimination switches and head number detection switches are abnormal, it shows that there is an error, and the alarm needs to be checked;

[0042] When the pre-fetching swing head III is fetched, the discrimination switch III signal and the first detection switch III signal need to be read. When the discrimination switch III signal is 1, the first detection switch III signal is 0, and the other discrimination switches and the first detection switch are normal, it is indicated that the head position III exists swing head, and it is swing head III, and the head can be fetched. If the discrimination switch III signal is 0, the first detection switch III signal is 1, or the other discrimination switches and the first detection switch are abnormal, it is indicated that there is an error, and an alarm is given for troubleshooting.

[0043] The error-proof detection switch I signal is 1 when the discrimination switch I signal is 1, which indicates that the head position I swing head matching is correct, and the head number is I. When the error-proof detection switch I signal is 0, it is indicated that the head position I swing head matching is incorrect, and the error swing head number needs to be further distinguished. The discrimination switch II signal and the discrimination switch III signal are used for distinguishing. If the discrimination switch II signal is 0 and the discrimination switch III signal is 1, it is indicated that the head position I error is swing head II. If the discrimination switch II signal is 1 and the discrimination switch III signal is 0, it is indicated that the head position I error is swing head III.

[0044] The error-proof detection switch II signal is 1 when the discrimination switch II signal is 1, which indicates that the head position II swing head matching is incorrect, and the error swing head number is 1. When the error-proof detection switch II signal is 0, the head position II swing head number needs to be further distinguished. The discrimination switch III is used for distinguishing. If the discrimination switch III signal is 0 and the in-machine swing head is swing head II, it is indicated that the head position II error is swing head III. If the discrimination switch III signal is 1, it is indicated that the head position II swing head matching is correct, and it is swing head II.

[0045] The error-proof detection switch III signal is 0 when the discrimination switch III signal is 1, which indicates that the head position III swing head matching is correct, and it is swing head III. When the error-proof detection switch III signal is 1, it is indicated that the head position III matching is incorrect, and the error swing head number needs to be further distinguished. The discrimination switch II is used for distinguishing. If the discrimination switch II signal is 0 and the in-machine swing head is swing head III, it is indicated that the head position III error is swing head II. If the discrimination switch II signal is 1, it is indicated that the head position III error is swing head I.

Claims

1. A method for improving the reliability of an automatically interchangeable head magazine in a five-axis machining center, characterized in that, It includes head return logic control, head removal logic control, head position I anti-misplacement detection, head position II anti-misplacement detection, and head position III anti-misplacement detection; the head removal control logic and the head return control logic work together with the head position I anti-misplacement detection, head position II anti-misplacement detection, and head position III anti-misplacement detection to determine the matching relationship between the three A pendulums and the same C pendulum, and verify it with the identification signal between the A and C pendulums to achieve accurate and reliable pendulum head exchange; The automatically interchangeable head storage unit includes a head storage bracket, three compartments, a support unit, a mounting frame, a position determination switch system, and a mistake prevention detection switch system. The three compartments are installed side by side on the head storage bracket, and each compartment is equipped with a support unit. The position determination switch system and the mistake prevention detection switch system are respectively installed at the three compartments through the mounting frame. The positioning discrimination switch system includes discrimination switch I, discrimination switch II and discrimination switch III, and discrimination switch I, discrimination switch II and discrimination switch III are contact switches; The error-proof detection switch system includes error-proof detection switch I, error-proof detection switch II, and error-proof detection switch III. Error-proof detection switch I and error-proof detection switch II are long-stroke detection switches and use diffuse reflection photoelectric sensors, while error-proof detection switch III is a short-stroke detection switch and uses a conventional photoelectric sensor. Discrimination switch I and error-proofing detection switch I are set at the middle compartment as head position I, used to place the swing head I; discrimination switch II and error-proofing detection switch II are set at the left compartment as head position II, used to place the swing head II; discrimination switch III and error-proofing detection switch III are set at the right compartment as head position III, used to place the swing head III. The head-return logic control is as follows: When the system executes the head return command, it first determines the in-machine swing head sequence number; When the machine is in position I (swing head I), it needs to be moved to position I (head return). At this time, the presence of a swing head in position I is determined by the discrimination switch I. When the discrimination switch I signal is 1, it indicates that a swing head exists in position I, an error has occurred, the feedback system alarms, and further investigation of the discrimination switch and the A and C swing matching signals is required. When the discrimination switch I signal is 0, it indicates that there is no head in position I, and the head can be replaced. The next step is to perform head position I misplacement prevention detection. When the device is in position II (swing head II), it needs to be moved to position II for head replacement. At this time, the presence of a swing head in position II is determined by the discrimination switch II. When the discrimination switch II signal is 1, it indicates that a swing head is present in position II, an error has occurred, and the feedback system alarms, requiring further investigation of the discrimination switch and the A and C swing head matching signals. When the discrimination switch II signal is 0, it indicates that there is no head in position II, and the head can be replaced. The next step is to perform head position II misplacement prevention detection. When the device is in position III, it needs to be moved to position III for head replacement. At this time, the discrimination switch III is used to determine whether there is a head in position III. When the discrimination switch III signal is 1, it means that there is a head in position III, an error has occurred, the feedback system alarm is triggered, and further investigation of the discrimination switch and the A and C pendulum matching signals is required. When the discrimination switch III signal is 0, it means that there is no head in position III, and the head can be replaced. The next step is to perform head position III anti-misplacement detection.

2. The method for improving the reliability of an automatically interchangeable head magazine in a five-axis machining center according to claim 1, characterized in that, The head retrieval logic control is as follows: When the system executes the head retrieval command, it first determines the pre-retrieval head sequence number; head retrieval head I is equipped with head number detection switch I, head retrieval head II is equipped with head number detection switch II, and head retrieval head III is equipped with head number detection switch III. When pre-fetching swing head I, it is necessary to read the signals of discrimination switch I and head detection switch I. If both discrimination switch I and head detection switch I are 1, it indicates that there is a swing head in head position I, and it is swing head I, so head retrieval can be performed; if the discrimination switch is 0 or the head detection switch is 0, it indicates that there is an error, and an alarm should be triggered for troubleshooting. When pre-fetching swing head II, it is necessary to read the signals of discrimination switch II and head detection switch II. If the discrimination switch II signal is 1, the head detection switch II signal is 0, and other discrimination switches and head detection switches are normal, it indicates that there is a swing head in head position II, and it is swing head II, so head retrieval can be performed. If the discrimination switch II signal is 0, the head detection switch II signal is 1, or other discrimination switches and head detection switches are abnormal, it indicates that there is an error, and an alarm should be triggered for troubleshooting. When pre-fetching the swing head III, it is necessary to read the signals of the discrimination switch III and the head detection switch III. If the discrimination switch III signal is 1, the head detection switch III signal is 0, and other discrimination switches and head detection switches are normal, it indicates that the head III has a swing head, and it is swing head III, so head retrieval can be performed. If the discrimination switch III signal is 0, the head detection switch III signal is 1, or other discrimination switches and head detection switches are abnormal, it indicates that there is an error, and an alarm should be triggered for troubleshooting.

3. The method for improving the reliability of an automatically interchangeable head magazine in a five-axis machining center according to claim 1, characterized in that, The head position I misplacement prevention detection is as follows: When the discrimination switch I signal is 1, the misplacement prevention detection switch I signal is also 1, indicating that the head position I swing head is correctly matched and the head number is I; when the misplacement prevention detection switch I signal is 0, it indicates that the head position I swing head is mismatched and the misplaced swing head number needs to be further determined; the discrimination is performed by the discrimination switch II and discrimination switch III signals. If the discrimination switch II signal is 0 and the discrimination switch III signal is 1, it indicates that the misplaced head position I is swing head II; if the discrimination switch II signal is 1 and the discrimination switch III signal is 0, it indicates that the misplaced head position I is swing head III.

4. The method for improving the reliability of an automatically interchangeable head magazine in a five-axis machining center according to claim 1, characterized in that, The head position II misplacement prevention detection is as follows: When the discrimination switch II signal is 1, the misplaced head number is 1, indicating that the head position II swing head is mismatched. When the misplaced head number is 1, the head position II swing head number needs to be further determined. The determination is made by discrimination switch III. If the discrimination switch III signal is 0 and the swing head is swing head II, it indicates that the misplaced head number is swing head III. If the discrimination switch III signal is 1, it indicates that the head position II swing head is correctly matched and is swing head II.

5. The method for improving the reliability of an automatically interchangeable head magazine in a five-axis machining center according to claim 1, characterized in that, The head position III misplacement prevention detection is as follows: When the discrimination switch III signal is 1, the misplacement prevention detection switch III signal is 0, indicating that the head position III swing head is correctly matched and is swing head III; when the misplacement prevention detection switch III signal is 1, it indicates that the head position III is mismatched and the incorrect swing head sequence number needs to be further determined; the discrimination switch II is used for determination. If the discrimination switch II signal is 0 and the swing head in the machine is swing head III, it indicates that the head position III is misplaced as swing head II; if the discrimination switch II signal is 1, it indicates that the head position III is misplaced as swing head I.

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