CN114871474A - Automatic chip breaking method for intelligent drilling of machine tool - Google Patents
Automatic chip breaking method for intelligent drilling of machine tool Download PDFInfo
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- CN114871474A CN114871474A CN202210645270.2A CN202210645270A CN114871474A CN 114871474 A CN114871474 A CN 114871474A CN 202210645270 A CN202210645270 A CN 202210645270A CN 114871474 A CN114871474 A CN 114871474A
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- 238000005553 drilling Methods 0.000 title claims abstract description 152
- 238000000034 method Methods 0.000 title claims abstract description 63
- 238000005520 cutting process Methods 0.000 claims abstract description 54
- 238000012545 processing Methods 0.000 claims abstract description 37
- 238000003754 machining Methods 0.000 claims abstract description 26
- 230000001960 triggered effect Effects 0.000 claims description 9
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B47/00—Constructional features of components specially designed for boring or drilling machines; Accessories therefor
- B23B47/34—Arrangements for removing chips out of the holes made; Chip- breaking arrangements attached to the tool
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The invention relates to an automatic chip breaking method for intelligent drilling of a machine tool, which belongs to the technical field of machine tools of machining centers and comprises a method for obtaining the rotating speed of a spindle motor, a variable operation method of a design program and chip breaking feed cutting control of drilling through a sensor by a numerical control machine. The control method for automatically breaking chips of the drill hole is designed and packaged into a program instruction of a customized G code which can be identified and executed by a CNC (computer numerical control) system of a machine tool, and the depth value Z of the drill hole, the feed value Q of each cutting revolution of a cutter, the chip breaking depth multiple value E, the safe height position value R of the drill hole and the chip breaking control closing identification value P are set and obtained through the instruction G code. The problems of difficult chip breaking, difficult chip removal and chip winding are thoroughly solved, and the drilling tool has the characteristics of good running stability, long service life of the tool, high drilling precision and the like. The method is suitable for multi-hole continuous chip breaking and deep hole processing chip breaking, reduces the auxiliary time for manually removing chips, and improves the drilling processing efficiency.
Description
Technical Field
The invention relates to the technical field of machining centers, in particular to an automatic chip breaking method for intelligent drilling of a machine tool.
Background
A large amount of cutting chips can be generated in the drilling process of the machining center, the cutting chips are required to be timely and effectively discharged, and otherwise, the problems of cutting blockage or galling of the inner wall of a hole, substandard smoothness and the like can be caused. In addition, according to different workpiece materials, some chips can be wound on the cutter and need to be removed by a manual method, so that the drilling efficiency is greatly reduced. The existing technology adopts a cutting tool with a chip breaking structure design, and realizes chip breaking processing by using a special structure of the tool, but the tool is not recommended to be used by a plurality of users due to high purchase cost.
Disclosure of Invention
The invention mainly solves the technical problems of difficult chip breaking and chip removal of chips generated in the drilling process, galling of the inner wall of a machined hole or unqualified surface finish caused by the chips, easy tool winding of the chips, low drilling machining efficiency and poor chip removal of deep hole drilling. The invention provides an automatic chip breaking method for intelligent drilling of a machine tool, which is characterized in that a control method of automatic chip breaking is customized and packaged into a program instruction capable of identifying and executing G codes of a numerical control system, a required drilling related variable data value is set and obtained, after program variable logic operation is carried out, incremental feed stepping cutting machining is carried out by controlling the machine tool, the number of idle turns of a spindle which is axially and instantaneously paused is accurately controlled, the cutting effect of chips is achieved by utilizing instantaneous idle cutting of the spindle, and the chip length adjustment control of drilling chip breaking can be realized by calculating and controlling the axial incremental stepping amount of drilling holes.
The method for intelligently drilling and automatically breaking chips of the machine tool can be suitable for drilling and breaking chips of various workpiece materials, continuous porous drilling and circulating breaking chips, drilling and breaking chips of a conventional cutter and deep hole breaking chips, greatly reduces the purchase cost of a user on the cutter, reduces the auxiliary time for manually removing the chips and improves the economical efficiency of drilling processing. The method for automatically breaking chips in drilling processing solves the technical problems of difficult chip breaking, difficult chip removal and easy chip winding of the drilling, can also ensure the processing precision and surface smoothness of the drilled hole, is favorable for improving the feeding speed of the drilled hole, improves the processing efficiency of the drilled hole and can also greatly prolong the service life of the cutter.
The technical problem of the invention is mainly solved by the following technical scheme:
an intelligent automatic chip breaking method for drilling holes on a machine tool comprises the steps that a numerical control machine tool obtains the rotating speed of a spindle motor through a sensor, a design program variable operation method and drilling chip breaking feeding cutting control. The control method for automatically breaking chips of the drill hole is designed and packaged into a program instruction of a customized G code which can be identified and executed by a CNC (computer numerical control) system of a machine tool, and the depth value Z of the drill hole, the feed value Q of each cutting revolution of a cutter, the chip breaking depth multiple value E, the safe height position value R of the drill hole and the chip breaking control closing identification value P are set and obtained through the instruction G code. The method adopts instruction program variable data logic operation, drilling depth judgment logic operation and machine tool drilling chip breaking feed cutting control.
Preferably, the program variable operation 1: the drilling feed speed value F is equal to the spindle rotation speed value S × the feed value Q per rotation of the tool, and the operation result F takes an integer value. Program variable operation 2: the drilling chip breaking depth variable A is the feed quantity Q multiplied by the numerical value E per rotation of the cutter, the size of the multiple value E can control the chip length of automatic chip breaking in drilling, the larger the multiple value E is, the longer the chip length after automatic chip breaking is, otherwise, the smaller the multiple value E is, and the shorter the chip length after automatic chip breaking is. Program variable operation 3: and (3) calculating a drilling feeding instant stop time variable B which is (60.0 divided by the main shaft rotating speed value S) multiplied by n to obtain a time value (unit: second) required by the main shaft to rotate for n circles, wherein the n value is determined according to the chip breaking process verification of different materials. Program variable operation 4: the target borehole depth position value C, which is the current borehole depth position z 1-the borehole chip breaking depth variable a, is initialized to zero at the start of the automatic chip breaking control.
Preferably, after drilling related data are set according to a program G code instruction, the control starting of automatic chip breaking of drilling is executed, a drilling shaft is quickly positioned to a position above the surface of a hole at a fixed distance, then the drilling shaft is fed to the initial plane coordinate position (the surface of a workpiece) of the drilling at a feeding speed F (an operational formula F is S multiplied by Q), the calculation of program variable operation data 4 is executed, a target drilling depth position value C is obtained (the operational formula C is Z1-A), the logical size comparison operation is carried out on the C value and a hole depth set value Z, when C is smaller than Z, the set drilling depth position is judged to be not reached, the drilling shaft of a machine tool is controlled to feed cutting action at the feeding speed increment of the F value, and the feeding stroke is a drilling chip breaking depth variable A value. After the cutting feed depth reaches the value A, an axial pause feed action is executed, the pause time is the value of a drilling feed instant pause time variable B (an operational formula B is (60.0 ÷ S). times.n), the feeding pause time length is controlled through calculation, the main shaft is idled for n circles, and the cutting effect on chips is achieved through instant idle cutting of the main shaft. And when the pause time is up, returning to perform calculation of the target drilling depth position value C (an operation formula C is Z1-A), and performing a new round of data judgment operation, if the target drilling depth position value C is smaller than Z, controlling the machine tool to repeatedly and circularly perform drilling axial incremental feed stepping cutting action until the target drilling depth position C is larger than a hole depth set value Z, controlling the machine tool to cut to the Z value hole depth position at the speed of the F value, after the completion, controlling the machine tool to quickly lift to a safe height R position, and if the calculated C is equal to Z, finishing drilling and lifting to the R position, so that the chip breaking machining action of one hole is controlled to be completed. Then, the coordinate position of the next hole site is set according to the program command G code, and the chip breaking process of the next hole site is completed by the control method, so as to continuously repeat the cycle process execution. And adding a chip breaking function closing identification value P after the last hole site coordinate instruction, closing the chip breaking control function after the chip breaking processing of the current hole site is finished when the instruction P0 is given, and initializing and resetting data in all program variable registers participating in the operation at this time so as to prepare for starting and executing variable operation next time and prevent the variable data operation in the subsequent registers from being wrong.
Preferably, the name of the package customized G code command can be changed according to the user's requirement, the initial default is defined as G500, and the command type is a loop command, that is, after the Z, R, Q, E value is commanded to the first hole program, when the multi-hole chip breaking processing is subsequently executed, only the position coordinates X and Y of each hole are commanded, the relevant set data of the chip breaking function will be kept effective for memory, and after the P0 is executed, the relevant data is initialized to reset to zero. The G code instruction sets the program position coordinate X and Y values of the drilling hole, the numerical values are stored in corresponding variable registers, the numerical range is set according to the processing requirement of a user workpiece, and the unit is as follows: mm (millimeters).
Preferably, the G code command sets a drilling depth position Z value, the numerical value is stored in a corresponding variable register, the numerical range is set according to the workpiece processing requirement of a user, and the unit is as follows: mm (millimeters). If the Z value is not set or the set value is 0 in the command, a system alarm is triggered to terminate the machine tool machining.
Preferably, the G code command sets a value R of the safe height position of the drilling hole, the value is stored in a corresponding variable register, the value range is set according to the processing requirement of a user workpiece, and the unit is as follows: mm (millimeters). If the R value is not set or the set value is 0 in the command, a system alarm is triggered to terminate the machine tool machining.
Preferably, the G code command sets a feed Q value of each revolution of the drilling tool, the numerical value is stored in a corresponding variable register, the numerical range is set according to the processing requirement of a user workpiece, and the unit is as follows: mm (millimeters). The Q value can be set according to the technical parameter recommendation value calibrated by using the drilling tool. If the Q value is not set or the set value is 0 in the command, a system alarm is triggered to terminate the machine tool machining.
Preferably, the G code instruction sets a drilling chip breaking depth multiple value E, the value is stored in a corresponding variable register, and the value range is recommended to be: 1-30, if the value E is not set or the set value is 0 in the instruction, the default initial assigned value is 5.
Preferably, the chip breaking drilling spindle running speed value S, unit: RPM/min (revolutions per minute), the value of which is stored in a corresponding variable register, which value is involved in the calculation of the drilling feed speed value F.
Preferably, the chip breaker drill feed speed value F, unit: mm/min (millimeter/minute), the operation formula is F, which is the main shaft rotating speed value S multiplied by the feed value Q of the cutter per revolution, and the operation result value is processed by taking an integer. The automatic chip breaking and feeding process of the drilling takes the calculated value F as the axial cutting speed.
Preferably, the depth value a of the drill chip breaking, unit: mm (millimeter), and the operation formula is that A is feed quantity Q multiplied by chip breaking depth multiplied by value E of the cutter per revolution. The borehole chip-breaking depth value a may participate in the calculation of the target borehole depth position value C. The chip breaking depth multiple value E determines the chip cutting length of automatic chip breaking of the drill hole, when the set multiple value E is larger, the chip cutting length generated after chip breaking is longer, otherwise, the multiple value E is smaller, the chip cutting length generated after chip breaking is shorter, and a user can determine and adjust the chip breaking depth multiple value E according to parameters such as workpiece material materials, cutter specifications and the like.
Preferably, the drill feed transient stop time variable B, unit: and S (second), wherein the operation formula is B ═ (60.0 ÷ main shaft rotating speed value S) × n, the time value required by the main shaft to rotate for n circles is accurately calculated according to different main shaft operating rotating speed values required by drilling processing, and the n value is determined according to the chip breaking process verification of different materials. By controlling the drilling feeding instant stop time variable B, the cutting effect of the chips is achieved by using the instant idle cutting of the main shaft.
Preferably, the target borehole depth position value C, unit: mm (millimeter), and the operation formula is C, namely the current drilling depth position value z 1-drilling chip breaking depth variable A. And when the C value is less than the Z value, the position is judged not to reach the set drilling depth, a chip breaking increment cutting feeding action is executed once, and the feeding speed is an operation value F. And after the chip breaking cutting is performed for one time, judging whether the comparative target C value is larger than the Z value again, if so, repeatedly and circularly performing the chip breaking increment feeding cutting action until the operation result target C value is larger than the set Z value, switching to an absolute position mode and controlling the axial feeding cutting to the Z value, and finishing the chip breaking processing circulation of a hole site.
Preferably, the drilling automatic chip breaking control closing identification value P is stored in a corresponding variable register, when the drilling automatic chip breaking control needs to be closed, a P0 instruction needs to be added after an X/Y coordinate instruction of a hole site, the P value is judged and calculated after current hole site machining is executed, if the P value is 0, the current chip breaking control is closed, and the numerical value in the register which is relevant to the current machining and participates in the calculation is initialized and cleared.
The invention can achieve the following effects:
compared with the prior art, the method for automatically breaking chips in intelligent drilling of the machine tool has the characteristics of good operation stability, long service life of the cutter and high machining efficiency. Through the logical operation of data variables, the aim of automatic chip breaking is fulfilled by matching the axial incremental feed stepping cutting of the drill hole with the idle cutting of the main shaft within the axial pause time, and the technical problems of difficult chip breaking, difficult chip removal, chip winding and the like in the drilling process are thoroughly solved. The drilling chip breaking machine is suitable for drilling chip breaking processing of various workpiece materials, continuous porous drilling chip breaking processing and drilling chip breaking processing of conventional cutters, greatly reduces the purchase cost of a user cutter, improves the drilling processing efficiency and prolongs the service life of the cutter.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments.
Example (b): a method for automatically breaking chips of intelligent drilling of a machine tool comprises a high-precision rotating speed sensor of a spindle motor of the numerical control machine tool and a control method for automatically breaking chips of drilling, wherein the control method is packaged into G500 program instructions which can be identified and executed by a numerical control system of the machine tool, and the instruction names can be designed and changed according to user requirements. Comprises program variable data logic operation, drilling depth logic operation and machine tool drilling chip breaking feed cutting control. The depth value Z of the drilled hole is set and obtained through a G code instruction, and the unit is as follows: mm (millimeters); feed per revolution Q, unit of tool cutting: mm (millimeters); a chip breaking depth multiple value E and an integer value of a recommended range of 1-30; drilling safe height position value R, unit: mm (millimeters); the chip breaking control closes the identification value P, and when commanded to P0, the current chip breaking control is closed. The invention relates to a programming instruction compiling format of an automatic chip breaking method for intelligent drilling of a machine tool, which comprises the following steps: G500X _ Y _ Z _ R _ Q _ E _ P _. When the CNC program of the numerical control system executes the instruction G500 code and starts the automatic chip breaking control of the machine tool drilling, the system will extract and store the set data value behind X, Y, Z, R, Q, E, P code into the corresponding program variable data register. If the Z value is not set or the set value is 0 in the command, a system alarm is triggered: "100, The depth data of The hole is empty! ", and terminating the machine tool machining; if the value of R is not set or the set value is 0 in the command, a system alarm is triggered: "101, R ═ 0, The data is empty! ", and terminating the machine tool machining; if the Q value is not set or the set value is 0 in the command, a system alarm is triggered: "102, Q ═ 0, The data is empty! ", and terminating the machine tool machining; if the value E is not set or the set value is 0 in the command, the default value is automatically set to 5.
After the instruction related data is set and the extraction register is finished, the following data values are obtained after the operation of the data program variables is executed: a drilling feeding speed value F, wherein an operational formula is that F is a main shaft rotating speed value S multiplied by a feeding quantity value Q of a cutter per revolution, and an operational result F value takes an integer value; the axial chip breaking depth variable A of the drill hole is calculated according to the formula that A is the feed quantity Q multiplied by the chip breaking depth multiple value E of the cutter per rotation; and (3) a drilling feeding instant stop time variable B, wherein the operational formula is B ═ (60.0 ÷ spindle rotating speed value S). times.n, and the value of n is determined according to the chip breaking process verification of different materials. After the data variable operation is completed, the X/Y axis of the machine tool is quickly positioned to the coordinate position of the hole site to be processed, the Z axis is quickly positioned to the position 2 mm above the surface of the hole site away from the fixed height position, and then the machine tool is moved to the coordinate position Z0.00 of the initial processing plane of the workpiece at the feeding speed F (the operation formula is F is S multiplied by Q), so that the preparation state of automatic chip breaking of drilling is reached.
After the Z axis of the machine tool reaches the Z0.00 position, executing the program variable operation to obtain: and a target drilling depth position value C (the operation formula is C-Z1-A), performing logic magnitude comparison operation on the C value and a hole depth set value Z, if the judgment result C is less than the Z value, judging that the set Z-axis drilling depth position is not reached, controlling the Z axis of the machine tool to feed the cutting action at the feed speed increment of the F value, and controlling the increment feed stroke to be a drilling chip breaking depth value variable A value (the operation formula is A-Q multiplied by E). The chip breaking depth multiple value E directly determines the length of chips after automatic chip breaking processing of drilling, the larger the multiple value E is, the longer the chip length after automatic chip breaking effect is, otherwise, the smaller the multiple value E is, the shorter the chip length after automatic chip breaking effect is, but the longer the program processing time is, and a user can determine and adjust the size of the incremental stepping multiple value E according to parameters such as the material/material of a processed workpiece, the specification of a drilling tool and the like. And after the Z-axis incremental feed cutting depth reaches the value A, performing axial accurate pause feeding action, wherein the pause time is a drilling feeding instant pause time variable B (an operational formula B is (60.0 ÷ S). times.n), the value n is determined according to chip breaking process verification of different materials, and when the value n is 0.8 in the example, the variable B is calculated to be the time value required by the main shaft to rotate for 0.8 circle. Through accurate calculation and control of the time of feeding pause, the spindle motor can finish the accurate idle rotation of 0.8 circle; by accurately controlling the axial instantaneous stop time variable B, the main shaft of the machine tool is in an idle cutting-free state, and the aim of cutting off drill cuttings is fulfilled by utilizing the instantaneous idle of the main shaft. And after the pause time is finished, returning to execute the calculation of the target drilling depth position value C (the operation formula C is Z1-A), and then performing a new round of data judgment operation, if the target drilling depth position value C is smaller than Z, controlling the machine tool to repeatedly and circularly execute drilling chip breaking feed cutting, continuously and repeatedly performing cutting feed by the step depth value of A on the Z axis of the machine tool until the target drilling depth position C is larger than the hole depth set value Z after the operation, controlling the machine tool to cut to the Z value hole depth position at the speed of the F value, and then quitting the machining circular judgment and axial cutting feed operation. And then controlling the Z axis of the machine tool to be quickly lifted and returned to the position of the safe height R, and finishing the chip breaking processing control action of one hole position. For multi-hole machining, the machine tool sets the coordinate position of the next hole according to the program instruction G code, and continues to finish machining of the next hole by the chip breaking feeding control method, so as to continuously and circularly machine and execute. When a chip breaking function closing identification value P is added after the last hole site coordinate instruction, the instruction writing format is as follows: and when the program instructs P0, the chip breaking control function is closed after the chip breaking processing of the current hole site is finished, and all data in the registers participating in the operation at this time are initialized and cleared to prepare for starting variable operation next time, so that the problem of operation errors is prevented.
In summary, the method for intelligently drilling and automatically breaking chips of the machine tool has the characteristics of good operation stability, long service life of the cutter, high drilling precision, high machining efficiency and the like. The problems of difficult chip breaking, difficult chip removal and chip winding are thoroughly solved, the processing precision and the surface smoothness of the drilled hole are ensured, the processing efficiency of the drilled hole can be greatly improved, and the service life of the cutter can be greatly prolonged. The drilling chip breaking machining of applicable various work piece materials, applicable continuous porous drilling chip breaking circulation processing, the drilling chip breaking machining of applicable conventional cutter, greatly reduced user's purchase cost on the cutter improves the economic nature of drilling processing.
The above description is only an embodiment of the present invention, but the structural features of the present invention are not limited thereto, and any changes or modifications within the scope of the present invention by those skilled in the art are covered by the present invention.
Claims (14)
1. The method for automatically breaking chips in intelligent drilling of the machine tool is characterized by comprising the following steps of: the method comprises the steps that the numerical control machine tool obtains the rotating speed of a spindle motor through a sensor, a design program variable operation method and drilling chip breaking feeding cutting control. The control method for automatically breaking chips of the drill hole is designed and packaged into a program instruction of a customized G code which can be identified and executed by a CNC (computer numerical control) system of a machine tool, and the depth value Z of the drill hole, the feed value Q of each cutting revolution of a cutter, the chip breaking depth multiple value E, the safe height position value R of the drill hole and the chip breaking control closing identification value P are set and obtained through the instruction G code; the method adopts instruction program variable data logic operation, drilling depth judgment logic operation and machine tool drilling chip breaking feed cutting control.
2. The method for automatically breaking chips in intelligent drilling of machine tools according to claim 1, characterized in that: program variable operation 1: the drilling feeding speed value F is equal to the main shaft rotating speed value S multiplied by the feeding quantity value Q of the cutter per revolution, and the operation result F value takes an integral value;
program variable operation 2: the drilling chip breaking depth variable A is the feed quantity Q multiplied by the numerical value E per rotation of the cutter, and the size of the multiple value E can realize the control of the chip length of the automatic chip breaking of the drilling;
program variable operation 3: the drilling feeding instant stop time variable B is (60.0 divided by the main shaft rotating speed value S) multiplied by n, the time value (unit: second) required by the main shaft rotating for n circles is obtained through calculation, and the n value is determined according to the chip breaking process verification of different materials;
program variable operation 4: the target borehole depth position value C, which is the current borehole depth position z 1-the borehole chip breaking depth variable a, is initialized to zero at the start of the automatic chip breaking control.
3. The method for automatically breaking chips in intelligent drilling of the machine tool according to claim 2, is characterized in that: after drilling related data are set according to a program G code instruction, control starting of automatic chip breaking of drilling is executed, a drilling shaft is quickly positioned to a position above the surface of a hole position at a fixed height, then the drilling shaft is fed to the initial plane coordinate position (the surface of a workpiece) of the drilling hole at a feeding speed F (an operational formula F is S multiplied by Q), program variable operational data 4 are calculated, a target drilling depth position value C (the operational formula C is Z1-A) is obtained, the C value and a hole depth set value Z are compared in logic size, when C is smaller than Z, the set drilling depth position is not reached, the drilling shaft of a machine tool is controlled to feed cutting actions at the feeding speed increment of the F value, and the feeding stroke is a drilling chip breaking depth variable A value; after the cutting feed depth reaches an A value, an axial pause feed action is executed, the pause time is a drilling feed instant pause time variable B value (an operational formula B is (60.0 ÷ S). times.n), the feed pause time length is controlled through calculation, the main shaft is idled for n circles, and the cutting effect on chips is achieved by using instant idle cutting of the main shaft; when the pause time is up, the calculation of the target drilling depth position value C is returned to be executed (the calculation formula C is Z1-A), a new round of data judgment calculation is carried out, if the target drilling depth position value C is smaller than Z, the machine tool is controlled to repeatedly and circularly execute the drilling axial incremental feed stepping cutting action, until the calculation result shows that the target drilling depth position C is larger than the hole depth set value Z, the machine tool is controlled to cut to the Z value hole depth position at the speed of the F value, the machine tool is controlled to be quickly lifted to return to the safe height R position after the completion of the calculation, the drilling is finished and the machine tool is lifted to the R position when the calculation C is equal to Z, and the chip breaking machining action of one hole is controlled to be completed; and setting the coordinate position of the next hole site according to the program instruction G code, continuously finishing the chip breaking processing of the next hole site by the control method, continuously repeating the cycle processing execution, adding a chip breaking function closing identification value P after the last hole site coordinate instruction, closing the chip breaking control function after finishing the chip breaking processing of the current hole site when the instruction P0 is carried out, and carrying out initialization and zero clearing on data in all program variable registers participating in the operation at this time, so as to prepare for starting the execution variable operation next time and prevent the error of the variable data operation in the subsequent registers.
4. The method for automatically breaking chips in intelligent drilling of machine tools according to claim 3, wherein the method comprises the following steps: the name of a packaging customized G code instruction can be designed and changed according to the requirements of a user, the initial default is G500, the type of the instruction is a circular instruction, namely after a Z, R, Q, E value is instructed to a first hole program, when multi-hole chip breaking processing is subsequently executed, only position coordinates X and Y values of all hole positions are instructed, related set data of a chip breaking function are kept to be effectively memorized, after P0 is executed, the related data are initialized to reset to zero, the G code instruction sets program position coordinates X and Y values of a drilling hole, the values are stored in corresponding variable registers, a numerical range is set according to the processing requirements of the user workpiece, and the unit: mm (millimeters).
5. The method for automatically breaking chips in intelligent drilling of machine tools according to claim 4, is characterized in that: g code instruction sets for drilling depth position Z value, and numerical value storage is in corresponding variable register, and the numerical range sets for according to user's work piece processing needs, and the unit: mm (millimeters). If the Z value is not set or the set value is 0 in the command, a system alarm is triggered to terminate the machine tool machining.
6. The method for automatically breaking chips in intelligent drilling of machine tools according to claim 4, is characterized in that: the G code instruction sets for the R value of the safe height position of the drilling hole, the numerical value is stored in a corresponding variable register, the numerical range is set according to the processing requirement of a user workpiece, and the unit is as follows: mm (millimeters). If the R value is not set or the set value is 0 in the command, a system alarm is triggered to terminate the machine tool machining.
7. The method for automatically breaking chips in intelligent drilling of machine tools according to claim 4, is characterized in that: the G code instruction sets the feed quantity Q value of the drilling tool per revolution, the numerical value is stored in a corresponding variable register, the numerical range is set according to the processing requirement of a user workpiece, and the unit is as follows: mm (millimeters). The Q value can be set according to the technical parameter recommendation value calibrated by using the drilling tool. If the Q value is not set or the set value is 0 in the command, a system alarm is triggered to terminate the machine tool machining.
8. The method for automatically breaking chips in intelligent drilling of the machine tool according to claim 4, wherein the method comprises the following steps: g code instruction sets for drilling chip breaking depth multiple value E, the value is stored in a corresponding variable register, and the value range is recommended as follows: 1-30, if the value E is not set or the set value is 0 in the instruction, the default initial assigned value is 5.
9. The method for automatically breaking chips in intelligent drilling of machine tools according to claim 1, characterized in that: chip breaking drilling spindle running speed value S, unit: RPM/min (revolutions per minute), the value of which is stored in a corresponding variable register, which value is involved in the calculation of the drilling feed speed value F.
10. The method for automatically breaking chips in intelligent drilling of the machine tool according to claim 9, wherein: the chip breaking drilling feeding speed value F is as follows, unit: mm/min (millimeter/minute), the operation formula is F, which is the main shaft rotating speed value S multiplied by the feed value Q of the cutter per revolution, and the operation result value is processed by taking an integer. The automatic chip breaking and feeding process of the drilling takes the calculated value F as the axial cutting speed.
11. The method for automatically breaking chips in intelligent drilling of machine tools according to claim 3, wherein the method comprises the following steps: drilling chip breaking depth value a, unit: mm (millimeter), and the operation formula is that A is feed quantity Q multiplied by chip breaking depth multiplied by value E of the cutter per revolution. The borehole chip-breaking depth value a may participate in the calculation of the target borehole depth position value C. The chip breaking depth multiple value E determines the chip length of automatic chip breaking of the drill hole, when the set multiple value E is larger, the chip length generated after chip breaking is longer, otherwise, the multiple value E is smaller, the chip length generated after chip breaking is shorter, and a user can determine and adjust the chip breaking depth multiple value E according to parameters such as the material quality of a workpiece, the specification of a cutter and the like.
12. The method for automatically breaking chips in intelligent drilling of machine tools according to claim 3, wherein the method comprises the following steps: drilling feed transient stop time variable B, unit: and S (second), wherein the operation formula is B ═ (60.0 ÷ main shaft rotating speed value S) × n, the time value required by the main shaft to rotate for n circles is accurately calculated according to different main shaft operating rotating speed values required by drilling processing, and the n value is determined according to the chip breaking process verification of different materials. By controlling the drilling feeding instant stop time variable B, the cutting effect of the chips is achieved by using the instant idle cutting of the main shaft.
13. The method for automatically breaking chips in intelligent drilling of machine tools according to claim 3, wherein the method comprises the following steps: target borehole depth position value C, unit: mm (millimeter), and the operation formula is C, namely the current drilling depth position value z 1-drilling chip breaking depth variable A. And performing logic size comparison operation on the operation value and a drilling depth Z value to serve as a judgment condition and basis for judging whether axial chip breaking feed cutting is continuously performed, when the C value is smaller than the Z value, judging that the position of the set drilling depth is not reached, performing chip breaking increment cutting feed action once, and setting the feed speed to be an operation value F. And after one chip breaking cutting is executed, judging whether the comparative target C value is larger than the Z value or not, if so, repeatedly and circularly executing a chip breaking increment feed cutting action, and switching to an absolute position mode and controlling axial feed cutting to the Z value until the calculated target C value is larger than the set Z value, and finishing the chip breaking processing cycle of one hole site.
14. The method for automatically breaking chips in intelligent drilling of machine tools according to claim 3, wherein the method comprises the following steps: and (3) closing the identification value P by drilling automatic chip breaking control, storing the numerical value in a corresponding variable register, adding a P0 instruction after an X/Y coordinate instruction of a hole site when the drilling automatic chip breaking control needs to be closed, performing judgment operation on the P value after current hole site machining is finished, closing the current chip breaking control if the P value is 0, and initializing and resetting the numerical value in the register which is relevant to the machining and participates in the operation.
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