CN112318204A - Machine tool mechanical zero point searching device and method and machine tool - Google Patents
Machine tool mechanical zero point searching device and method and machine tool Download PDFInfo
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Abstract
The invention discloses a machine tool zero point searching device, a method and a machine tool, wherein the device comprises: the sensing unit is arranged at the zero position of the control shaft of the machine tool; the enabling unit is configured to provide an enabling signal to the sensing unit before the machine tool is reworked after power-off maintenance; the sensing unit is configured to find an original mechanical zero point of the control shaft under the condition that the sensing unit receives the enabling signal provided by the enabling unit; and a control unit configured to control the control shaft to abruptly stop and determine a position where the control shaft stops moving as a position of an original mechanical zero point of the control shaft, in a case where the sensing unit finds the original mechanical zero point of the control shaft. According to the scheme provided by the invention, the mechanical zero point of the machine tool can be quickly found, the danger of the machine tool during the remachining process is avoided, and the safety of the machine tool during the remachining process is improved.
Description
Technical Field
The invention belongs to the technical field of machine tools, particularly relates to a zero point searching device and method for a machine tool and a machine tool, and particularly relates to a device and method for quickly searching zero points of a numerical control machine tool and a machine tool.
Background
The machine tool is forced to be powered off for maintenance, the original mechanical zero point is easily lost or the effective stroke is subjected to positive or negative integral translation, the corresponding positive soft limit and the negative soft limit can also be subjected to positive or negative translation, and the soft limit is probably translated outside the safe effective stroke, so that the machine tool is easily dangerous when being processed again.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention aims to provide a machine zero point recovery device, a machine zero point recovery method and a machine tool of the machine tool, and aims to solve the problem that when the machine tool is in power-off maintenance, the original machine zero point is easily lost or the effective stroke is subjected to positive or negative integral translation, so that the soft limit is translated beyond the safe effective stroke, and the machine tool is easily dangerous during re-processing, so that the machine zero point of the machine tool can be quickly recovered, the machine tool is prevented from being dangerous during re-processing, and the safety of the machine tool during re-processing is improved.
The invention provides a machine tool zero point recovery device, comprising: the device comprises a sensing unit, an enabling unit and a control unit; the induction unit is arranged at the zero position of a control shaft of the machine tool; wherein the enabling unit is configured to provide an enabling signal to the sensing unit before the machine tool is remachined after power-off maintenance; the sensing unit is configured to find an original mechanical zero point of the control shaft under the condition that the sensing unit receives an enabling signal provided by the enabling unit; the control unit is configured to control the control shaft to suddenly stop and determine a position where the control shaft stops moving as a position of an original mechanical zero point of the control shaft in a case where the sensing unit finds the original mechanical zero point of the control shaft.
In some embodiments, the number of sensing units is the same as the number of control axes of the machine tool; each induction unit is arranged at the original mechanical zero position of each control shaft; the number of the enabling units is the same as that of the sensing units; each enabling unit is arranged corresponding to each sensing unit; wherein the position of the original mechanical zero point of each control axis can be determined individually in the process of determining the position of the original mechanical zero point of the control axis.
In some embodiments, in the case where the number of the control axes is three, three of the control axes include: an X-axis, a Y-axis, and a Z-axis; three of the sensing units, corresponding to the three control axes, includes: three inductive switches; three of the enabling units, comprising: three enable buttons; and the three enabling buttons are arranged on an operation panel of the machine tool.
In some embodiments, the enabling unit providing an enabling signal to the sensing unit includes: the enabling unit is in the enabling state if receiving an instruction which can enable the enabling unit to be in the enabling state, and provides an enabling signal for the sensing unit under the condition that the enabling unit is in the enabling state.
In some embodiments, the sensing unit, finding the original mechanical zero point of the control shaft, comprises: and if the sensing unit receives a moving instruction which can move the control shaft to search an original mechanical zero point, the sensing unit moves along with the control shaft according to the moving instruction, and is in a closed state under the condition that the sensing unit moves to the original mechanical zero point so as to determine that the sensing unit finds the original mechanical zero point of the control shaft.
In accordance with the above apparatus, a further aspect of the present invention provides a machine tool comprising: the machine tool zero point recovery device is described above.
In another aspect, the present invention provides a machine zero point searching method for a machine tool, including: through an enabling unit, providing an enabling signal to the sensing unit before the machine tool is remachined after power-off maintenance; through the induction unit, under the condition that the induction unit receives an enabling signal provided by the enabling unit, an original mechanical zero point of the control shaft is searched; through a control unit, under the condition that the sensing unit finds an original mechanical zero point of the control shaft, the control shaft is controlled to suddenly stop, and the position where the control shaft stops moving is determined as the position of the original mechanical zero point of the control shaft; wherein the sensing unit is arranged at a zero point position of a control shaft of the machine tool.
In some embodiments, the number of sensing units is the same as the number of control axes of the machine tool; each induction unit is arranged at the original mechanical zero position of each control shaft; the number of the enabling units is the same as that of the sensing units; each enabling unit is arranged corresponding to each sensing unit; wherein the position of the original mechanical zero point of each control axis can be determined individually in the process of determining the position of the original mechanical zero point of the control axis.
In some embodiments, providing an enable signal to the sensing unit by an enable unit includes: through the enabling unit, if an instruction capable of enabling the enabling unit to be in the enabling state is received, the enabling unit is in the enabling state, and an enabling signal is provided for the sensing unit under the condition that the enabling unit is in the enabling state.
In some embodiments, finding the original mechanical zero point of the control shaft by the sensing unit comprises: through the induction unit, if a movement instruction which can enable the control shaft to move to search for an original mechanical zero point is received, the induction unit moves along with the control shaft according to the movement instruction, and is in a closed state under the condition that the induction unit moves to the original mechanical zero point, so that the original mechanical zero point of the control shaft is found by the induction unit.
Therefore, according to the scheme of the invention, the induction switch is arranged at the mechanical zero point of the machine tool, the induction switch enabling button is additionally arranged on the control panel of the machine tool, and the machine tool can accurately find the original mechanical zero point position under the condition of enabling the induction switch, so that the mechanical zero point of the machine tool can be quickly found, the danger of the machine tool during the re-processing is avoided, and the safety of the machine tool during the re-processing is improved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of a machine zero point recovery apparatus of the present invention;
FIG. 2 is a schematic diagram of the overall structure of one embodiment of the machine tool;
FIG. 3 is a schematic diagram of the X-axis mechanical zero movement of an embodiment of a machine tool;
FIG. 4 is a schematic control flow diagram of one embodiment of a machine tool;
FIG. 5 is an electrical schematic of one embodiment of a machine tool;
FIG. 6 is a schematic flow chart illustrating a process for determining an X-axis mechanical zero for one embodiment of a machine tool;
fig. 7 is a flowchart illustrating a machine zero point recovery method according to an embodiment of the present invention.
The reference numbers in the embodiments of the present invention are as follows, in combination with the accompanying drawings:
1-a servo motor; 2-upright post; 3-a main spindle box; 4-a workbench; 5-an electric spindle; 6-a lead screw; 7-a guide rail; 8-mechanical bump; s1-original mechanical zero; s2-move the rear mechanical zero.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
According to an embodiment of the invention, a machine tool zero point recovery device is provided. Referring to fig. 1, a schematic diagram of an embodiment of the apparatus of the present invention is shown. The machine tool zero point recovery device can comprise: the device comprises a sensing unit, an enabling unit and a control unit. The sensing unit is arranged at the zero point position of the control shaft of the machine tool. And a sensing unit, such as a sensing switch. An enabling unit, such as an enable button. A control unit, such as a control center of a machine tool.
Wherein the enabling unit is configured to provide an enabling signal to the sensing unit before the machine tool is reworked after power-off maintenance.
In some embodiments, the enabling unit providing an enabling signal to the sensing unit includes: the enabling unit is in the enabling state if receiving an instruction which can enable the enabling unit to be in the enabling state after the machine tool is powered off and repaired and then is used for machining again, and provides an enabling signal for the sensing unit under the condition that the enabling unit is in the enabling state, namely provides the enabling signal for the sensing unit corresponding to the enabling unit.
The sensing unit is configured to find an original mechanical zero point of the control shaft under the condition that the sensing unit receives the enabling signal provided by the enabling unit.
In some embodiments, the finding of the original mechanical zero point of the control shaft by the sensing unit in case that the sensing unit itself receives the enable signal provided by the enable unit comprises: the sensing unit moves along with the control shaft according to the movement instruction if receiving the movement instruction which can move the control shaft to search an original mechanical zero point under the condition that the sensing unit receives the enabling signal provided by the enabling unit, and is in a closed state under the condition that the sensing unit moves to the original mechanical zero point so as to determine that the sensing unit finds the original mechanical zero point of the control shaft.
Specifically, in order to quickly and accurately retrieve the original mechanical zero point after the mechanical zero point is lost, an inductive switch needs to be installed at the original mechanical zero point, so that the inductive switch is in a closed state when each shaft is at the mechanical zero point, and otherwise, the inductive switch is in an open state. For example: and stopping the shaft at the position of the mechanical zero point of the corresponding shaft after receiving the mechanical zero point signal of the corresponding shaft. If the mechanical zero point of the X axis is sought, when the system receives the mechanical zero point signal of the X axis, the X axis is stopped, and the position of the X axis is the position of the mechanical zero point of the X axis. Therefore, the original machine zero point can be accurately found, the corresponding safe effective stroke can not generate displacement within the safe stroke, the tool changing position and the tool setting position can not be changed, and the tool changing position and the tool setting position are prevented from being adjusted, so that the safety performance of the machine tool is improved, the damage to the precision of the machine tool is avoided, the debugging time is saved, the production is quickly recovered, the service life of the machine tool is prolonged, and the like.
The control unit is configured to control the control shaft to stop suddenly when the sensing unit finds the original mechanical zero point of the control shaft, namely, control the control shaft to stop moving when the sensing unit is in a closed state, and determine the position of the control shaft at which the control shaft stops moving as the position of the original mechanical zero point of the control shaft. Specifically, the position of the inductive switch is the position of the mechanical zero point, and after the mechanical zero point is lost, the machine tool can determine the position of the original mechanical zero point as long as the machine tool finds the position of the inductive switch.
Therefore, through the induction unit, the enabling unit and the control unit, the enabling unit is right under the condition that the induction unit is enabled, the machine tool can accurately find the zero position of the original machine through the control of the control unit, the danger caused by the fact that the machine tool runs to the outside of a safety stroke due to soft limiting when the machine tool is processed again after power-off maintenance is avoided, and the safety performance is improved.
In some embodiments, the number of sensing units is the same as the number of control axes of the machine tool. Each induction unit is arranged at the original mechanical zero position of each control shaft. The number of the enabling units is the same as that of the sensing units. Each enabling unit is arranged corresponding to each sensing unit.
Wherein the position of the original mechanical zero point of each control axis can be determined individually in the process of determining the position of the original mechanical zero point of the control axis.
Specifically, an axis corresponds to an inductive switch and an enable button of the inductive switch, and the front end of each inductive switch is provided with an enable button, so that the purposes are as follows: on one hand, the enabling button can be used for starting the machine tool only when the mechanical zero point needs to be searched (if the enabling button is pressed, the induction switch corresponding to the enabling button is started), and the enabling button is not used for starting the machine tool when the mechanical zero point does not need to be searched, so that the situation that a signal for searching the mechanical zero point is mistakenly transmitted back to the system is avoided, and the machine tool cannot normally work; on the other hand, which axis mechanical zero is lost finds which axis mechanical zero, such as: when the X-axis mechanical zero point is lost, the X-axis induction switch enabling button is pressed down, and the X-axis mechanical zero point is retrieved.
In some embodiments, in the case where the number of the control axes is three, three of the control axes include: an X-axis, a Y-axis, and a Z-axis.
Three of the sensing units, corresponding to the three control axes, includes: three inductive switches. Three of the enabling units, comprising: three enable buttons. And the three enabling buttons are arranged on an operation panel of the machine tool.
Specifically, an inductive switch can be installed at the mechanical zero point of the machine tool, and an inductive switch enabling button is added on a control panel of the machine tool. For example: three self-locking buttons can be arranged on an MCP operation panel and are respectively used for enabling induction switches of X, Y, Z shafts, when mechanical zero points of all shafts need to be searched, the self-locking buttons are respectively started, for example, the mechanical zero points of an X shaft need to be searched, an X shaft induction switch enabling button is pressed on a control panel, a positive direction key or a negative direction key is pressed in a manual mode to search the mechanical zero points, when a machine tool finds the mechanical zero points of the X shaft, the induction switches are closed, signals are transmitted back to a numerical control system, the numerical control system transmits the signals to a servo driver through PLC program processing, the servo driver controls a servo motor to stop, and at the moment, the X shaft stop position is the original mechanical zero point position. The Y axis is the same as the Z axis.
Through a large number of tests, the technical scheme of the invention is adopted, the induction switch is arranged at the machine zero point of the machine tool, the induction switch enabling button is additionally arranged on the machine tool control panel, the machine tool can accurately find the original machine zero point position under the condition of enabling the induction switch, the machine tool zero point is not changed when the machine tool is processed again after power-off maintenance, the corresponding positive soft limit and negative soft limit can not be shifted to the positive direction or the negative direction, the danger caused by the fact that the soft limit runs out of the safe stroke can be avoided, and the safety performance is improved.
According to the embodiment of the invention, a machine tool corresponding to the machine zero point searching device of the machine tool is also provided. The machine tool may include: the machine tool zero point recovery device is described above.
Under the condition of forced outage maintenance of the numerical control machine tool, a maintenance operator actively or passively exerts an external force to cause a certain shaft to move positively or negatively, so that the original mechanical zero point is lost or the effective stroke is subjected to positive or negative integral translation, the corresponding positive soft limit and the negative soft limit can also translate positively or negatively, the soft limit can be translated to the outside of the safe effective stroke, the machine tool is easy to collide when being processed again, the processing precision of the machine tool is influenced, the service life of the machine tool is shortened, the safety performance of the machine tool is reduced, and unexpected risks exist.
The numerical control machine tool is characterized in that the numerical control machine tool is in a power-off state, the positions of all axes of the machine tool are displaced under the action of external force, and because the numerical control machine tool is in the power-off state, all the axes of the numerical control machine tool cannot transmit the displacement information to the driver, the driver cannot receive signals, and the signals cannot be transmitted back to the system. The system cannot receive the position information change of each axis of the numerical control machine tool, and when the numerical control machine tool is electrified again, the mechanical zero point and the positive and negative limit of the numerical control machine tool can translate towards the positive direction or the negative direction.
And because the offset of the mechanical zero point also can influence the actual tool changing position and tool aligning position, the mechanical zero point is changed, the tool changing position and the tool aligning position are required to be reset, the operation is complicated, the time is wasted, and the processing progress is influenced.
In some embodiments, the invention provides a scheme for quickly retrieving a mechanical zero point of a numerically-controlled machine tool, and the method is characterized in that an inductive switch is installed at the mechanical zero point of the machine tool, an inductive switch enabling button is additionally arranged on a control panel of the machine tool, and the machine tool can accurately find the original mechanical zero point position through PLC programming and hardware circuit design under the condition of enabling the inductive switch.
Therefore, when the machine tool is machined again after power-off maintenance, the mechanical zero point of the machine tool is not changed, the corresponding positive soft limit and negative soft limit can not be shifted to the positive direction or the negative direction, the danger caused by the fact that the soft limit runs out of the safe stroke can be avoided, and the safety performance is improved. Furthermore, the machine tool does not collide, the processing precision of the machine tool cannot be damaged, and the service life of the machine tool is prolonged. Meanwhile, the mechanical zero point of the machine tool is locked at the original position, the corresponding tool changing position and the corresponding tool aligning position are also maintained at the original positions, the complicated operation process of resetting the tool changing position and the tool aligning position is avoided, the time for maintaining and debugging the machine tool is reduced to a certain extent, and the influence on the processing progress is avoided.
Therefore, under the condition that the numerical control machine tool is maintained in a power-off state, all the shafts are moved under the action of external force or the mechanical zero point is deviated or disappears due to other unknown reasons, after the machine tool is electrified again, the scheme of the invention can help maintenance workers to quickly and accurately find the original mechanical zero point, avoid the translation of positive/negative soft limit of the machine tool and avoid resetting of a tool changing position and a tool setting position, thereby improving the safety performance of the machine tool, avoiding the damage of the precision of the machine tool, saving the debugging time, quickly recovering the production, prolonging the service life of the machine tool and the like.
The following describes an exemplary implementation process of the scheme of the present invention with reference to the examples shown in fig. 2 to fig. 6.
Fig. 2 is a schematic structural diagram of a complete machine of an embodiment of a machine tool, and fig. 3 is a schematic structural diagram of X-axis mechanical zero point movement of an embodiment of a machine tool.
In the example shown in fig. 2 and 3, the machine tool includes: servo motor 1, stand 2, headstock 3, workstation 4, electric spindle 5, lead screw 6, guide rail 7 and mechanical ram 8. When the machine tool is forced to be power-off for maintenance, the safe effective stroke of the machine tool is easily changed due to the influence of external force or undefined factors on the position of the mechanical zero point, and the safe effective stroke may move beyond the mechanical bump 8 or the safe stroke, in which case the machining is very dangerous. Due to the movement of the mechanical zero point (for example, compared with the original mechanical zero point S2, the original mechanical zero point S1 is moved in the original mechanical zero point S1), the tool changing position and the tool setting position are changed accordingly, and the tool setting and tool changing cannot be accurately carried out. By adopting the scheme of the invention, the original mechanical zero point can be accurately found, the corresponding safe effective stroke can not generate displacement within the safe stroke, the tool changing position and the tool setting position can not be changed, and the tool changing position and the tool setting position can be prevented from being adjusted, so that the safety performance of the machine tool is improved, the damage to the precision of the machine tool is avoided, the debugging time is saved, the production is quickly recovered, the service life of the machine tool is prolonged, and the like.
The following is an example of a three-axis vertical machining center of a siemens 828D numerical control system, and a specific implementation process of the scheme of the present invention is exemplarily described.
In the scheme of the invention, in order to quickly and accurately retrieve the original mechanical zero point after the mechanical zero point is lost, an inductive switch is required to be arranged at the original mechanical zero point, so that the inductive switch is in a closed state when each shaft is at the mechanical zero point position, or is in an open state. Taking the X-axis as an example (as shown in fig. 3), an inductive switch is installed at the original mechanical zero position.
After the mechanical zero point is lost, the machine tool can determine the position of the original mechanical zero point as long as the machine tool finds the position of the inductive switch.
Fig. 4 is a control flow diagram of an embodiment of a machine tool. As shown in fig. 4, the control flow of the siemens 828D numerical control system includes:
step 11, MCP operation panel (Mode Control panel).
And step 12, sensing a switch.
And step 14, servo driving.
And step 15, servo motors of all the shafts.
In the example shown in fig. 4, three self-locking buttons are set on an MCP (Mode Control panel) and are respectively used for enabling the induction switches of X, Y, Z axes, when mechanical zero points of each axis need to be searched, the self-locking buttons are respectively enabled, for example, when mechanical zero points of an X axis need to be searched, an X-axis induction switch enable button is pressed on the Control panel, a positive direction key or a negative direction key is pressed to search for a mechanical zero point in a manual Mode, when a machine tool finds the mechanical zero points of the X axis, the induction switches are closed to transmit signals back to the numerical Control system, the numerical Control system transmits signals to a servo driver through the processing of a PLC program, the servo driver controls the servo motor to stop, and at the moment, the X-axis stop position is the original mechanical zero point position. The Y axis is the same as the Z axis and will not be described in detail here.
FIG. 5 is an electrical schematic of one embodiment of a machine tool. In the example shown in fig. 5, it can be known that one axis corresponds to one inductive switch and one enable button of the inductive switch, and each inductive switch has one enable button at its front end, for the purpose of: on one hand, the enabling button can be used for starting the machine tool only when the mechanical zero point needs to be searched (if the enabling button is pressed, the induction switch corresponding to the enabling button is started), and the enabling button is not used for starting the machine tool when the mechanical zero point does not need to be searched, so that the situation that a signal for searching the mechanical zero point is mistakenly transmitted back to the system is avoided, and the machine tool cannot normally work; on the other hand, which axis mechanical zero is lost finds which axis mechanical zero, such as: when the X-axis mechanical zero point is lost, the X-axis induction switch enabling button is pressed down, and the X-axis mechanical zero point is retrieved.
In the example shown in fig. 5, the servo drive unit: the feeding of a feeding shaft is controlled mainly by driving a servo motor; taking the servo drive of siemens as an example, the servo drive unit is divided into a power module and a motor module, the power module converts 220V alternating current into 600V direct current, the 600V direct current is supplied to each motor module through a direct current bus, the motor module converts the 600V direct current into alternating current to be supplied to a servo motor, the feeding of the feeding shaft is controlled, and the feeding shaft can be stopped by disconnecting the enabling of the power module.
In the example shown in fig. 5, the control unit: the PLC program is processed in the module, which is the control center of the whole numerical control machine tool.
In the example shown in FIG. 5, the I/O module: there are a number of available input and output points, for signal input: an external signal is transmitted to a certain input point of the I/O port module, and the signal is transmitted to the control unit for processing through the communication between the I/O port module and the control unit. In the scheme of the invention, the signal of the mechanical zero point needs to be input into the control unit through the I/O module for processing; the same is true for signal output, the control unit outputs the processed signal to the I/O port module, and the I/O port module outputs the signal to a required place.
In the example shown in fig. 5, the relay module: in the scheme of the invention, the relay module also has the function of transferring signals in the middle, a bus is arranged between the relay module and the I/O module to transfer the signals, namely, mechanical zero signals are transmitted to the relay module and transferred to the I/O port module through the bus, and finally, the signals are input into the control unit to be processed.
Fig. 6 is a schematic flow chart of determining the X-axis mechanical zero point according to an embodiment of the machine tool. In the example shown in fig. 6, taking the X axis to find the original mechanical zero point as an example, a specific process of finding the position of the inductive switch and then determining the position of the original mechanical zero point by the machine tool is exemplarily described. As shown in fig. 6, determining the position of the original mechanical zero point of the X-axis includes:
step 21, judging whether an enabling signal of the X-axis inductive switch exists or not, and if so, executing step 22; otherwise, the method continues to wait in step 21, that is, whether the enable signal of the X-axis inductive switch exists is continuously judged.
Step 22, judging whether an X-axis mechanical zero signal is detected or not, and if so, executing step 23; otherwise, return to step 21.
And step 23, sending an emergency stop signal to an NCK (NC real Kemal, numerical control real-time operating system) to trigger the emergency stop to take effect.
Specifically, the shaft may be stopped at the position of the mechanical zero point of the corresponding shaft after receiving the mechanical zero point signal of the corresponding shaft. For example: when the system receives the mechanical zero point signal of the X axis, the X axis is stopped, and the position of the X axis is the position of the mechanical zero point of the X axis.
For example: taking the X axis as an example, when the X axis is at the mechanical zero position, the signal enters the PLC through the I5.4 port (as shown in fig. 5) of the I/O port, the PLC reads the signal of I5.4, and when it is at the high level, the scram procedure will be triggered, and the servo drive will control the servo motor to stop immediately.
Since the processes and functions implemented by the machine tool of the present embodiment substantially correspond to the embodiments, principles and examples of the apparatus shown in fig. 1, the descriptions of the present embodiment are not detailed, and refer to the related descriptions in the foregoing embodiments, which are not described herein again.
Through a large number of tests, the technical scheme of the invention is adopted, the induction switch is arranged at the machine zero point of the machine tool, the induction switch enabling button is additionally arranged on the machine tool control panel, the machine tool accurately finds the original machine zero point position under the condition of enabling the induction switch, the machine tool does not change at the machine zero point after the machine tool is powered off and overhauled, the corresponding positive soft limit and negative soft limit can not translate towards the positive direction or the negative direction, the machine tool does not collide, the damage to the machining precision of the machine tool can not be caused, and the service life of the machine tool can be prolonged.
According to the embodiment of the invention, a machine zero point searching method of the machine tool corresponding to the machine tool is also provided, and a flow chart of the embodiment of the method is shown in fig. 7. The machine tool zero point recovery method can comprise the following steps: step S110 to step S130.
At step S110, an enable signal is provided to the sensing unit by an enable unit before the machine tool is reworked after power-off maintenance.
In some embodiments, the providing, by the enabling unit, the enabling signal to the sensing unit in step S110 includes: through the enabling unit, before the machine tool is remachined after power-off maintenance, if an instruction capable of enabling the enabling unit to be in the enabling state is received, the enabling unit is in the enabling state, and under the condition that the enabling unit is in the enabling state, an enabling signal is provided for the sensing unit, namely the enabling signal is provided for the sensing unit corresponding to the enabling unit.
At step S120, by the sensing unit, in case that the sensing unit itself receives the enable signal provided by the enable unit, an original mechanical zero point of the control shaft is found.
In some embodiments, the finding, in step S120, an original mechanical zero point of the control shaft by the sensing unit in case that the sensing unit itself receives the enable signal provided by the enable unit includes: through the induction unit, under the condition that the induction unit receives an enabling signal provided by the enabling unit, if a moving instruction which can enable the control shaft to move to search an original mechanical zero point is received, the induction unit moves along with the control shaft according to the moving instruction, and under the condition that the induction unit moves to the original mechanical zero point, the induction unit is in a closed state to determine that the induction unit finds the original mechanical zero point of the control shaft.
Specifically, in order to quickly and accurately retrieve the original mechanical zero point after the mechanical zero point is lost, an inductive switch needs to be installed at the original mechanical zero point, so that the inductive switch is in a closed state when each shaft is at the mechanical zero point, and otherwise, the inductive switch is in an open state. For example: and stopping the shaft at the position of the mechanical zero point of the corresponding shaft after receiving the mechanical zero point signal of the corresponding shaft. If the mechanical zero point of the X axis is sought, when the system receives the mechanical zero point signal of the X axis, the X axis is stopped, and the position of the X axis is the position of the mechanical zero point of the X axis. Therefore, the original machine zero point can be accurately found, the corresponding safe effective stroke can not generate displacement within the safe stroke, the tool changing position and the tool setting position can not be changed, and the tool changing position and the tool setting position are prevented from being adjusted, so that the safety performance of the machine tool is improved, the damage to the precision of the machine tool is avoided, the debugging time is saved, the production is quickly recovered, the service life of the machine tool is prolonged, and the like.
In step S130, the control shaft is controlled to stop suddenly by the control unit when the sensing unit finds the original mechanical zero point of the control shaft, that is, the control shaft is controlled to stop moving when the sensing unit is in the closed state, and the position where the control shaft stops moving is determined as the position of the original mechanical zero point of the control shaft. Specifically, the position of the inductive switch is the position of the mechanical zero point, and after the mechanical zero point is lost, the machine tool can determine the position of the original mechanical zero point as long as the machine tool finds the position of the inductive switch.
Wherein the sensing unit is arranged at a zero point position of a control shaft of the machine tool. And a sensing unit, such as a sensing switch. An enabling unit, such as an enable button. A control unit, such as a control center of a machine tool.
Therefore, through the induction unit, the enabling unit and the control unit, the enabling unit is right under the condition that the induction unit is enabled, the machine tool can accurately find the zero position of the original machine through the control of the control unit, the danger caused by the fact that the machine tool runs to the outside of a safety stroke due to soft limiting when the machine tool is processed again after power-off maintenance is avoided, and the safety performance is improved.
In some embodiments, the number of sensing units is the same as the number of control axes of the machine tool. Each induction unit is arranged at the original mechanical zero position of each control shaft. The number of the enabling units is the same as that of the sensing units. Each enabling unit is arranged corresponding to each sensing unit.
Wherein the position of the original mechanical zero point of each control axis can be determined individually in the process of determining the position of the original mechanical zero point of the control axis.
Specifically, an axis corresponds to an inductive switch and an enable button of the inductive switch, and the front end of each inductive switch is provided with an enable button, so that the purposes are as follows: on one hand, the enabling button can be used for starting the machine tool only when the mechanical zero point needs to be searched (if the enabling button is pressed, the induction switch corresponding to the enabling button is started), and the enabling button is not used for starting the machine tool when the mechanical zero point does not need to be searched, so that the situation that a signal for searching the mechanical zero point is mistakenly transmitted back to the system is avoided, and the machine tool cannot normally work; on the other hand, which axis mechanical zero is lost finds which axis mechanical zero, such as: when the X-axis mechanical zero point is lost, the X-axis induction switch enabling button is pressed down, and the X-axis mechanical zero point is retrieved.
Wherein, in a case where the number of the control axes is three, the three control axes include: an X-axis, a Y-axis, and a Z-axis; three of the sensing units, corresponding to the three control axes, includes: three inductive switches; three of the enabling units, comprising: three enable buttons; and the three enabling buttons are arranged on an operation panel of the machine tool.
Specifically, an inductive switch can be installed at the mechanical zero point of the machine tool, and an inductive switch enabling button is added on a control panel of the machine tool. For example: three self-locking buttons can be arranged on an MCP operation panel and are respectively used for enabling induction switches of X, Y, Z shafts, when mechanical zero points of all shafts need to be searched, the self-locking buttons are respectively started, for example, the mechanical zero points of an X shaft need to be searched, an X shaft induction switch enabling button is pressed on a control panel, a positive direction key or a negative direction key is pressed in a manual mode to search the mechanical zero points, when a machine tool finds the mechanical zero points of the X shaft, the induction switches are closed, signals are transmitted back to a numerical control system, the numerical control system transmits the signals to a servo driver through PLC program processing, the servo driver controls a servo motor to stop, and at the moment, the X shaft stop position is the original mechanical zero point position. The Y axis is the same as the Z axis.
Since the processing and functions implemented by the method of the present embodiment substantially correspond to the embodiments, principles and examples of the machine tool, reference may be made to the related descriptions in the foregoing embodiments without being detailed in the description of the present embodiment.
Through a large amount of tests verification, adopt the technical scheme of this embodiment, through installing an inductive switch in the position at lathe mechanical zero point, increase an inductive switch enable button on lathe control panel, under the condition to its inductive switch enable, make the lathe accurately find original mechanical zero point position, the mechanical zero point of lathe is locked in the original position, the tool changing position that corresponds also maintains original position with the tool setting, the loaded down with trivial details operation process of resetting tool changing position and tool setting has been avoided, the time of lathe maintenance debugging has also been reduced to a certain extent, the influence to the processing progress has been avoided.
In summary, it is readily understood by those skilled in the art that the advantageous modes described above can be freely combined and superimposed without conflict.
The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. A zero point recovery device for machine tool machinery, comprising: the device comprises a sensing unit, an enabling unit and a control unit; the induction unit is arranged at the zero position of a control shaft of the machine tool; wherein the content of the first and second substances,
the enabling unit is configured to provide an enabling signal to the sensing unit before the machine tool is remachined after power-off maintenance;
the sensing unit is configured to find an original mechanical zero point of the control shaft under the condition that the sensing unit receives an enabling signal provided by the enabling unit;
the control unit is configured to control the control shaft to suddenly stop and determine a position where the control shaft stops moving as a position of an original mechanical zero point of the control shaft in a case where the sensing unit finds the original mechanical zero point of the control shaft.
2. The machine zero point recovery device of claim 1, wherein the number of the sensing units is the same as the number of the control axes of the machine tool; each induction unit is arranged at the original mechanical zero position of each control shaft; the number of the enabling units is the same as that of the sensing units; each enabling unit is arranged corresponding to each sensing unit;
wherein the position of the original mechanical zero point of each control axis can be determined individually in the process of determining the position of the original mechanical zero point of the control axis.
3. The machine zero point recovery device according to claim 2, wherein in the case where the number of the control axes is three, three control axes include: an X-axis, a Y-axis, and a Z-axis;
three of the sensing units, corresponding to the three control axes, includes: three inductive switches; three of the enabling units, comprising: three enable buttons; and the three enabling buttons are arranged on an operation panel of the machine tool.
4. The machine zero point recovery device of any one of claims 1 to 3, wherein the enabling unit provides an enabling signal to the sensing unit, and comprises:
the enabling unit is in the enabling state if receiving an instruction which can enable the enabling unit to be in the enabling state, and provides an enabling signal for the sensing unit under the condition that the enabling unit is in the enabling state.
5. The machine zero point homing device of any one of claims 1 to 3, wherein the sensing unit, finding the original mechanical zero point of the control shaft, comprises:
and if the sensing unit receives a moving instruction which can move the control shaft to search an original mechanical zero point, the sensing unit moves along with the control shaft according to the moving instruction, and is in a closed state under the condition that the sensing unit moves to the original mechanical zero point so as to determine that the sensing unit finds the original mechanical zero point of the control shaft.
6. A machine tool, comprising: the machine zero point recovery device of any one of claims 1 to 5.
7. A machine tool zero point recovery method is characterized by comprising the following steps:
through an enabling unit, providing an enabling signal to the sensing unit before the machine tool is remachined after power-off maintenance;
through the induction unit, under the condition that the induction unit receives an enabling signal provided by the enabling unit, an original mechanical zero point of the control shaft is searched;
through a control unit, under the condition that the sensing unit finds an original mechanical zero point of the control shaft, the control shaft is controlled to suddenly stop, and the position where the control shaft stops moving is determined as the position of the original mechanical zero point of the control shaft;
wherein the sensing unit is arranged at a zero point position of a control shaft of the machine tool.
8. The machine zero point recovery method of claim 7, wherein the number of the sensing units is the same as the number of the control axes of the machine tool; each induction unit is arranged at the original mechanical zero position of each control shaft; the number of the enabling units is the same as that of the sensing units; each enabling unit is arranged corresponding to each sensing unit;
wherein the position of the original mechanical zero point of each control axis can be determined individually in the process of determining the position of the original mechanical zero point of the control axis.
9. The machine zero point recovery method of claim 7 or 8, wherein providing an enable signal to the sensing unit via an enable unit comprises:
through the enabling unit, if an instruction capable of enabling the enabling unit to be in the enabling state is received, the enabling unit is in the enabling state, and an enabling signal is provided for the sensing unit under the condition that the enabling unit is in the enabling state.
10. The machine zero point recovery method of claim 7 or 8, wherein the step of searching for the original mechanical zero point of the control shaft through the sensing unit comprises:
through the induction unit, if a movement instruction which can enable the control shaft to move to search for an original mechanical zero point is received, the induction unit moves along with the control shaft according to the movement instruction, and is in a closed state under the condition that the induction unit moves to the original mechanical zero point, so that the original mechanical zero point of the control shaft is found by the induction unit.
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