CN106826260B - Alarm device for automatically detecting angle deflection of rotary worktable - Google Patents
Alarm device for automatically detecting angle deflection of rotary worktable Download PDFInfo
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- CN106826260B CN106826260B CN201710230646.2A CN201710230646A CN106826260B CN 106826260 B CN106826260 B CN 106826260B CN 201710230646 A CN201710230646 A CN 201710230646A CN 106826260 B CN106826260 B CN 106826260B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/25—Movable or adjustable work or tool supports
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/007—Arrangements for observing, indicating or measuring on machine tools for managing machine functions not concerning the tool
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Abstract
The invention belongs to a rotary worktable and a control method thereof, and particularly relates to an alarm device for automatically detecting the angle deflection of the rotary worktable. The alarm device includes: the high-pressure oil pipe, relief pressure valve, solenoid directional valve, check valve, clamping cylinder, pressure relay, cable, contactor normally open contact, contactor normally closed contact, alarm lamp, auxiliary relay normally open contact and auxiliary relay normally closed contact. The invention controls the operation of the alarm system by detecting the hydraulic pressure of the clamping oil cylinder through the pressure relay, can find the clamping state of the rotary worktable in time in processing production, has high response speed when detecting the deflection of the rotary worktable, can quickly respond when detecting that the clamping pressure of the clamping oil cylinder of the rotary worktable is lower than a fixed value of the pressure relay, has simple and novel structure, saves cost, is convenient for operators to use, saves time and improves efficiency.
Description
Technical Field
The invention belongs to a rotary worktable and a control method thereof, and particularly relates to a detection system and an alarm system for the angle deflection of the rotary worktable of a floor type boring and milling machine.
Background
At present, when the common floor type boring and milling machine equipment runs in an ideal state, the rotating workbench is required to rotate to a specific position according to the requirement when the floor type boring and milling machine rotates the workbench, then the clamping of the rotating workbench clamping cylinder is executed to command the rotating workbench to clamp, and the rotating workbench is ensured not to deflect in the angle in the rotating workbench in the heavy cutting torque process. In the prior art, a plurality of common rotary working tables of the boring and milling machine do not have any pressure detection alarm device, and the machine tool is generally used for marking, leveling and aligning. In the processing process, aiming at the problem of monitoring whether the rotary table is clamped or not, a general counter measure is adopted, wherein a dial indicator is adsorbed beside a rotary worktable, the processing is carried out while observing, and if the dial indicator is found to change, the processing is stopped immediately. Although the conventional monitoring method can intuitively find whether the rotary worktable deflects, the method is time-consuming, labor-consuming and inconvenient. At present, some manufacturers have reformed the numerical control of the rotary table and install the alarm in a numerical control system. Although the technical problem that the monitoring mode of the traditional dial indicator is complex in labor and time is solved, the clamping state of the rotary worktable can be monitored in real time and rapidly, related spare parts such as a PLC module need to be added in the monitoring mode, equipment is complex, and the modification cost is high. Therefore, how to design a monitoring device capable of guaranteeing real-time monitoring and automatically detecting the deflection of the angle of the rotary worktable at low cost becomes a difficult problem to be solved urgently at present.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides an alarm device for automatically detecting the deflection of the angle of a rotary worktable, which adopts the principle that a pressure relay converts a pressure signal into an electric signal, controls the operation of an alarm system by detecting the hydraulic pressure of a clamping oil cylinder, can find the clamping state of the rotary worktable in time in processing production, has high response speed of the alarm system for detecting the deflection of the rotary worktable, can quickly make a response when detecting that the clamping pressure of the clamping oil cylinder of the rotary worktable is lower than the value determined by the pressure relay equipment, and can start to alarm by an alarm lamp, so that the problems can be found in time, and the problem of processing quality caused by the deflection of the angle of a rotary table in the production and processing process is prevented; the invention can replace numerical control transformation by combining the system of the rotary table and adding an external detection alarm device, saves cost, simultaneously thoroughly eliminates the working mode that an operator works on the edge of the rotary table and checks the clamping state of the rotary table, is convenient for the operator to use, saves time and improves efficiency.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the invention provides an alarm device for automatically detecting the angle deflection of a rotary worktable, which is characterized by comprising: the high-pressure oil pipe is communicated with the clamping oil cylinder sequentially through the pressure reducing valve, the electromagnetic reversing valve and the one-way valve, the pressure relay is arranged on the high-pressure oil pipe between the electromagnetic reversing valve and the one-way valve, and the pressure relay detects the hydraulic pressure of the clamping oil cylinder by converting a pressure signal into an electric signal; pressure relay is connected with intermediate relay normally open contact and intermediate relay normally closed contact respectively to according to the size of the pressure signal who detects, to intermediate relay normally open contact and intermediate relay normally closed contact send the signal of telecommunication, the break-make of intermediate relay normally open contact control contactor normally open contact, the break-make of intermediate relay normally closed contact control contactor normally closed contact, the alarm lamp with contactor normally open contact, contactor normally closed contact are established ties for the switching of the on-off state control alarm lamp through contactor normally open contact and contactor normally closed contact represents the tight state of clamp of clamping cylinder, and then the revolving stage angle change that the representation swivel work head leads to because of the tight pressure of clamp of clamping cylinder is not enough.
The electromagnetic reversing valve further comprises an oil return pipe and a hydraulic gauge, wherein the oil return pipe is arranged on the electromagnetic reversing valve, and the hydraulic gauge is arranged on a high-pressure oil pipe between the pressure reducing valve and the electromagnetic reversing valve.
Furthermore, the alarm lamp alarms in a ringing and flashing mode.
Furthermore, the rotating workbench is a common rotating workbench of a floor type boring and milling machine.
Meanwhile, the invention also provides a use method of the alarm device for automatically detecting the angle deflection of the rotary worktable, which is characterized by comprising the following steps:
(1) When the rotary workbench is opened, a rotary workbench motor-pump set is started, a high-pressure oil pipe supplies oil to the clamping oil cylinder through a pressure reducing valve, an electromagnetic reversing valve and a one-way valve, meanwhile, a pressure relay converts a pressure signal into an electric signal and transmits the electric signal to a normally open contact of an intermediate relay to electrify a coil of the intermediate relay, and a normally open contact of a contactor is closed;
(2) When the pressure relay detects that the hydraulic pressure of the clamping oil cylinder is greater than the set value of the pressure relay, the pressure relay converts a pressure signal into an electric signal and transmits the electric signal to the normally closed contact of the intermediate relay to electrify the coil of the intermediate relay, the normally closed contact of the contactor is disconnected, at the moment, the pressure of the clamping oil cylinder is normal, the rotary workbench is in a clamping state, the rotary workbench works normally, the circuit of the alarm system is in a disconnection state, and the alarm lamp does not work;
(3) When the rotary worktable is in a non-clamping state due to a fault, the hydraulic pressure of the clamping oil cylinder is lower than the set value of the pressure relay, the pressure relay converts the detected oil cylinder pressure value into an electric signal and feeds the electric signal back to the normally closed contact of the pressure detection intermediate relay to enable the coil of the pressure detection intermediate relay to lose power, the normally closed contact of the contactor is closed, an alarm system circuit formed by connecting the normally closed contact of the contactor, the normally open contact of the contactor and an alarm lamp in series is in a path state, and the alarm lamp starts to ring and flash to give an alarm.
The invention has the following beneficial effects:
(1) According to the alarm device for automatically detecting the deflection of the angle of the rotary worktable, which is provided by the invention, the principle that a pressure relay converts a pressure signal into an electric signal is adopted, the operation of the alarm system is controlled by detecting the hydraulic pressure of the clamping oil cylinder, the clamping state of the rotary worktable can be timely found in processing production, the whole system is low in cost, the structure is simple and novel, and the operation is stable.
(2) The alarm device for automatically detecting the deflection of the angle of the rotary worktable, provided by the invention, has the advantages that the reaction speed of the alarm system for detecting the deflection of the rotary worktable is high, when the clamping pressure of the clamping oil cylinder of the rotary worktable is detected to be lower than the value fixed by a pressure relay device, the alarm system can quickly respond, and an alarm lamp starts to give an alarm, which means that the clamping state of the rotary worktable is not optimal, and an equipment operator immediately stops a machine tool to contact with a device maintainer to check when hearing the alarm lamp to blink and cry or seeing the alarm lamp to blink, so that the problems can be found in time, and the problem of the processing quality caused by the deflection of the angle of the rotary table in the production and processing process is prevented.
(3) The alarm device for automatically detecting the angle deflection of the rotary worktable, provided by the invention, can replace numerical control reconstruction by combining a system of the rotary worktable and adding an external detection alarm device, so that the cost is saved, meanwhile, the working mode that an operator checks the clamping state of the rotary worktable while working on the edge of the rotary worktable is thoroughly eliminated, the use of the operator is facilitated, the time is saved, and the efficiency is improved.
Drawings
FIG. 1 is a schematic view of the present invention.
FIG. 2 is a schematic diagram of a control circuit according to the present invention.
Fig. 3 is a schematic diagram of a main circuit of the present invention.
The hydraulic pressure meter comprises a high-pressure oil pipe 1, a high-pressure oil pipe 2, a pressure reducing valve 3, an electromagnetic directional valve 4, a one-way valve 5, an oil return pipe 6, a hydraulic pressure meter 7, a clamping oil cylinder 8, a pressure relay 9, a cable 10, a contactor normally open contact 11, a contactor normally closed contact 12, an alarm lamp 13, an intermediate relay normally open contact 14 and an intermediate relay normally closed contact.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to specific examples. The following examples are illustrative only and are not to be construed as limiting the invention.
According to one aspect of the present invention, there is provided an alarm device for automatically detecting an angular deflection of a rotary table, as shown in fig. 1 to 3, comprising: the hydraulic pressure detection device comprises a high-pressure oil pipe 1, a pressure reducing valve 2, an electromagnetic directional valve 3, a one-way valve 4, an oil return pipe 5, a hydraulic pressure meter 6, a clamping oil cylinder 7, a pressure relay 8, a cable 9, a contactor normally-open contact 10, a contactor normally-closed contact 11, an alarm lamp 12, an intermediate relay normally-open contact 13 and an intermediate relay normally-closed contact 14, wherein the high-pressure oil pipe is communicated with the clamping oil cylinder sequentially through the pressure reducing valve, the electromagnetic directional valve and the one-way valve, the pressure relay is installed on the high-pressure oil pipe between the electromagnetic directional valve and the one-way valve, and the pressure relay detects the hydraulic pressure of the clamping oil cylinder by converting a pressure signal into an electric signal; pressure relay is connected with intermediate relay normally open contact and intermediate relay normally closed contact respectively to according to the size of the pressure signal who detects, to intermediate relay normally open contact and intermediate relay normally closed contact send the signal of telecommunication, the break-make of intermediate relay normally open contact control contactor normally open contact, the break-make of intermediate relay normally closed contact control contactor normally closed contact, the alarm lamp with contactor normally open contact, contactor normally closed contact are established ties for the switching of the on-off state control alarm lamp through contactor normally open contact and contactor normally closed contact represents the tight state of clamp of clamping cylinder, and then the revolving stage angle change that the representation swivel work head leads to because of the tight pressure of clamp of clamping cylinder is not enough.
The alarm device for automatically detecting the angle deflection of the rotary worktable, disclosed by the invention, comprises a pressure relay 8, a cable 9, a contactor normally open contact 10, a contactor normally closed contact 11, an alarm lamp 12, an intermediate relay normally open contact 13 and an intermediate relay normally closed contact 14, wherein the alarm circuit formed by connecting the contactor normally open contact, the contactor normally closed contact and the alarm lamp in series is controlled by the pressure relay to realize real-time monitoring on whether the angle of the rotary worktable deviates, and the change of the angle of the rotary worktable caused by insufficient clamping pressure of a clamping oil cylinder is represented by the opening and closing state of the alarm lamp. The pressure relay is respectively connected with the normally open contact of the intermediate relay and the normally closed contact of the intermediate relay, the normally open contact of the intermediate relay controls the on-off of the normally open contact of the contactor, and the normally closed contact of the intermediate relay controls the on-off of the normally closed contact of the contactor.
According to the embodiment of the invention, as shown in fig. 3, the alarm device comprises a contactor normally open contact 10, a contactor normally closed contact 11 and an alarm lamp 12, which are connected in series to form an alarm main circuit, and the on-off state of the alarm lamp is controlled by the on-off state of the contactor normally open contact and the contactor normally closed contact. The normally open contact of the contactor is used for representing the opening and closing state of the motor pump set, and further representing the working state that the rotary workbench is opened or closed. When the rotary workbench is opened, the rotary workbench motor pump set is started, and the normally open contact of the contactor is closed; when the rotary worktable is closed, the rotary worktable motor-pump set is closed, and the normally open contact of the contactor is disconnected. And the contactor normally closed contact is used for detecting whether the clamping pressure of the clamping oil cylinder exceeds a set value or not so as to represent the clamping state of the rotary worktable. When the rotary workbench works normally, the rotary workbench is in a clamping state, and the normally closed contact of the contactor is disconnected; when the rotary workbench cannot work normally due to faults of an oil pump motor set, oil leakage of an oil pipe, a hydraulic control one-way valve and the like, the rotary workbench is in a non-clamping state, and the normally closed contact of the contactor is closed. And the alarm lamp is used for indicating whether the rotary worktable is in a clamping state or not. When the rotary workbench works normally, the rotary workbench is in a clamping state, the normally closed contact of the contactor is in a disconnection state, the alarm main circuit formed by the serial connection is in an open circuit state, and the alarm lamp does not work; when the rotary worktable can not normally work, the rotary worktable is in a non-clamping state, the normally open contact of the contactor and the normally closed contact of the contactor are simultaneously in a closed state, the alarm main circuit formed by series connection is in a passage state, and the alarm lamp starts to work and starts to sound and flash for alarm.
According to a specific embodiment of the present invention, as shown in fig. 2, the alarm device includes a pressure relay 8, an intermediate relay normally open contact 13 and an intermediate relay normally closed contact 14 for controlling the open and close states of the alarm main line. The pressure relay is arranged on the high-pressure oil pipe between the electromagnetic directional valve and the one-way valve and used for detecting the hydraulic pressure transmitted to the clamping oil cylinder through the high-pressure oil pipe. Meanwhile, the pressure relay is connected with the intermediate relay normally-open contact 13 and the intermediate relay normally-closed contact 14, and is used for converting the detected pressure signal into an electric signal and transmitting the electric signal to the intermediate relay normally-open contact 13 and the intermediate relay normally-closed contact 14.
According to the specific embodiment of the invention, the voltage relay is connected with the normally open contact of the contactor through the normally open contact of the intermediate relay, and is used for controlling the on-off of the normally open contact of the contactor according to the existence of the detected pressure transmitted to the clamping oil cylinder through the high-pressure oil pipe, so as to represent that the rotary worktable is in an open or closed working state. When the rotary workbench is opened, the voltage relay detects the existence of the pressure transmitted to the clamping oil cylinder through the high-pressure oil pipe, the voltage relay converts the pressure signal into an electric signal and transmits the electric signal to the normally open contact of the intermediate relay, the normally open contact coil of the intermediate relay is electrified, and the normally open contact of the contactor is attracted; when the rotary worktable is closed, the voltage relay detects that the pressure transmitted to the clamping oil cylinder through the high-pressure oil pipe does not exist, the voltage relay converts the pressure signal into an electric signal and transmits the electric signal to the normally open contact of the intermediate relay, the normally open contact coil of the intermediate relay loses electricity, and the normally open contact of the contactor is disconnected.
According to the specific embodiment of the invention, the pressure relay is communicated with the normally closed contact of the contactor through the normally closed contact of the intermediate relay, and is used for controlling the on-off of the normally closed contact of the contactor according to whether the detected pressure transmitted to the clamping oil cylinder through the high-pressure oil pipe exceeds the set value of the pressure relay, so that the change of the angle of the rotary table caused by insufficient clamping pressure of the clamping oil cylinder is represented. When the rotary workbench does not change the angle and normally works, the rotary workbench is in a clamping state, the pressure relay detects that the hydraulic pressure of the clamping oil cylinder is greater than a set value of the pressure relay, the normally closed contact coil of the intermediate relay is electrified, and the normally closed contact of the contactor is disconnected; when the rotary worktable cannot normally work due to the fact that the rotary worktable is subjected to angle deviation caused by faults of an oil pump motor set, oil leakage of an oil pipe, a hydraulic control one-way valve and the like, the rotary worktable is in a non-clamping state, the pressure relay detects that hydraulic pressure of a clamping oil cylinder is lower than a set value of the pressure relay, a normally closed contact coil of the intermediate relay is powered off, and a normally closed contact of the contactor is closed.
The invention provides an alarm device for automatically detecting the angle deflection of a rotary worktable, which comprises a high-pressure oil pipe 1, a pressure reducing valve 2, an electromagnetic directional valve 3, a one-way valve 4, an oil return pipe 5, a hydraulic gauge 6 and a clamping oil cylinder 7, and is used for providing hydraulic pressure for the rotary worktable during operation, as shown in figure 1. The high-pressure oil pipe sequentially passes through the pressure reducing valve, the electromagnetic reversing valve and the one-way valve and is communicated with the clamping oil cylinder, and hydraulic pressure provided by the rotary workbench motor pump set is transmitted to the clamping oil cylinder through the high-pressure oil pipe, so that the clamping oil cylinder can execute a clamping command when the rotary workbench operates, and the angle of the rotary workbench can not deviate during operation.
According to the specific embodiment of the invention, two ends of the high-pressure oil pipe are respectively connected with the rotary worktable motor pump set and the clamping oil cylinder, and the high-pressure oil pipe is used for conveying flowing oil bodies to one end of the clamping oil cylinder, so that hydraulic power provided by the motor pump set is transmitted to the clamping oil cylinder in an oil body conveying manner, and therefore, sufficient pressure is provided for the clamping oil cylinder when a clamping command is executed. The pressure reducing valve is used for regulating and controlling the hydraulic pressure of the high-pressure oil pipe, and when the pressure of the high-pressure oil pipe is too high, the pressure reducing valve is subjected to pressure reducing operation, so that the buffer effect of hydraulic pressure transmission is achieved. The hydraulic pressure gauge is arranged on the high-pressure oil pipe between the pressure reducing valve and the electromagnetic directional valve and used for indicating the pressure of an oil body in the high-pressure oil pipe after the pressure reducing valve reduces the pressure, so that the hydraulic pressure gauge is beneficial to assisting the pressure reducing valve in carrying out more accurate control on the hydraulic pressure in the high-pressure oil pipe. The oil return pipe is arranged on the electromagnetic reversing valve and is used for regulating and controlling the flow direction and the flow speed of oil bodies in the high-pressure oil pipe, when the clamping oil cylinder of the rotary workbench is in a clamping state, the rotary workbench normally works, and the oil bodies in the high-pressure oil pipe flow to the clamping oil cylinder through the electromagnetic reversing valve; when the clamping oil cylinder of the rotary worktable is in a non-clamping state, the rotary worktable generates angular deviation to cause abnormal work, which is usually caused by faults of an oil pump motor set, oil leakage of an oil pipe, a hydraulic control one-way valve and the like, and oil in the high-pressure oil pipe flows to the oil return pipe through the electromagnetic reversing valve. The check valve is used for ensuring that the flowing direction of the oil body in the high-pressure oil pipe has unicity, so that the oil body in the high-pressure oil pipe can only flow to the clamping oil cylinder through the check valve.
Meanwhile, according to another aspect of the present invention, the present invention also provides a method for using the above alarm device for automatically detecting the angular deflection of the rotary table, which is characterized by comprising the following steps:
(1) When the rotary workbench is opened, a motor-pump set of the rotary workbench is started, a high-pressure oil pipe supplies oil to the clamping oil cylinder through a pressure reducing valve, an electromagnetic reversing valve and a one-way valve, meanwhile, a pressure relay converts a pressure signal into an electric signal and transmits the electric signal to a normally open contact of an intermediate relay to enable a coil of the intermediate relay to be electrified, and a normally open contact of a contactor is closed.
According to the specific embodiment of the invention, when the rotary workbench is opened, the rotary workbench is rotated to a specific position according to the specific requirements of the floor type boring and milling machine during the operation of the rotary workbench, meanwhile, the rotary workbench motor pump set is started, a high-pressure oil pipe is adopted to supply oil to the clamping oil cylinder through a pressure reducing valve, an electromagnetic directional valve and a one-way valve, and the hydraulic pressure of the motor pump set is transmitted to the clamping oil cylinder, so that sufficient hydraulic pressure is provided for the subsequent clamping oil cylinder to execute a clamping command, the clamping oil cylinder can clamp the rotary workbench in the step (2), the angle of the rotary workbench can not deflect in the process of heavy cutting torque, and a pressure relay arranged on the high-pressure oil pipe converts a detected pressure signal into an electric signal and transmits the electric signal to a normally open contact of an intermediate relay to electrify a coil of the intermediate relay, and the normally open contact of a contactor is attracted.
According to the specific embodiment of the invention, the voltage relay is connected with the normally open contact of the contactor through the normally open contact of the intermediate relay, and is used for controlling the on-off of the normally open contact of the contactor by detecting whether the pressure transmitted to the clamping oil cylinder through the high-pressure oil pipe exists or not. When the rotary workbench is opened, the voltage relay detects that the pressure transmitted to the clamping oil cylinder through the high-pressure oil pipe exists, the voltage relay converts a pressure signal into an electric signal and transmits the electric signal to the normally open contact of the intermediate relay, the normally open contact coil of the intermediate relay is electrified, and the normally open contact of the contactor is closed; when the rotary worktable is closed, the voltage relay detects that the pressure transmitted to the clamping oil cylinder through the high-pressure oil pipe does not exist, the voltage relay converts the pressure signal into an electric signal and transmits the electric signal to the normally open contact of the intermediate relay, the normally open contact coil of the intermediate relay loses electricity, and the normally open contact of the contactor is disconnected.
According to the specific embodiment of the invention, the alarm device comprises a high-pressure oil pipe 1, a pressure reducing valve 2, an electromagnetic directional valve 3, a one-way valve 4, an oil return pipe 5, a hydraulic gauge 6 and a clamping oil cylinder 7, and is used for providing hydraulic pressure for the operation of a rotary workbench. The high-pressure oil pipe sequentially passes through the pressure reducing valve, the electromagnetic reversing valve and the one-way valve and is communicated with the clamping oil cylinder, and hydraulic pressure provided by the rotary workbench motor pump set is transmitted to the clamping oil cylinder through the high-pressure oil pipe, so that the clamping oil cylinder can execute a clamping command when the rotary workbench operates, and the angle of the rotary workbench can not deviate during operation. Furthermore, the hydraulic pressure gauge is arranged on the high-pressure oil pipe between the pressure reducing valve and the electromagnetic directional valve and used for indicating the pressure of the oil body in the high-pressure oil pipe after the pressure reducing valve reduces the pressure, so that the hydraulic pressure control device is beneficial to assisting the pressure reducing valve in carrying out more accurate control on the hydraulic pressure in the high-pressure oil pipe. The oil return pipe is arranged on the electromagnetic reversing valve, when a clamping oil cylinder of the rotary worktable is in a non-clamping state, the rotary worktable generates angular deviation to cause abnormal work, usually caused by faults of an oil pump motor set, oil leakage of an oil pipe, a hydraulic control one-way valve and the like, and oil in the high-pressure oil pipe flows to the oil return pipe through the electromagnetic reversing valve.
(2) When the pressure relay detects that the hydraulic pressure of the clamping oil cylinder is greater than the set value of the pressure relay, the pressure relay converts a pressure signal into an electric signal and transmits the electric signal to the normally closed contact of the intermediate relay to enable the coil of the intermediate relay to be electrified, the normally closed contact of the contactor is disconnected, at the moment, the pressure of the clamping oil cylinder is normal, the rotating workbench is in a clamping state, the rotating workbench works normally, the circuit of the alarm system is in a disconnection state, and the alarm lamp does not work.
According to the specific embodiment of the invention, the pressure relay is communicated with the contactor normally closed contact through the intermediate relay normally closed contact, and is used for detecting whether the pressure transmitted to the clamping oil cylinder through the high-pressure oil pipe exceeds the set value of the pressure relay or not, and then controlling the on-off of the contactor normally closed contact. When the rotary workbench works normally, the rotary workbench is in a clamping state, the pressure relay detects that the hydraulic pressure of the clamping oil cylinder is greater than a set value of the pressure relay, the normally closed contact coil of the intermediate relay is electrified, and the normally closed contact of the contactor is disconnected; when the rotary worktable can not normally work due to faults of an oil pump motor set, oil leakage of an oil pipe, a hydraulic control one-way valve and the like, the rotary worktable is in a non-clamping state, the pressure relay detects that the hydraulic pressure of the clamping oil cylinder is lower than a set value of the pressure relay, the normally closed contact coil of the intermediate relay is powered off, and the normally closed contact of the contactor is closed.
According to the specific embodiment of the invention, the alarm device comprises a contactor normally-open contact 10, a contactor normally-closed contact 11 and an alarm lamp 12 which are connected in series to form an alarm main circuit, and the on-off state of the alarm lamp is controlled through the on-off state of the contactor normally-open contact and the contactor normally-closed contact. And the contactor normally closed contact is used for detecting the clamping state of the clamping oil cylinder so as to represent whether the rotary worktable works normally or not. When the rotary worktable works normally, the rotary worktable is in a clamping state, and the normally closed contact of the contactor is disconnected; when the rotary worktable can not work normally due to faults of an oil pump motor set, oil leakage of an oil pipe, a hydraulic control one-way valve and the like, the rotary worktable is in a non-clamping state, and the normally closed contact of the contactor is closed. The alarm lamp is used for indicating whether the rotary worktable is in a clamping state or not, and further representing the change of the angle of the rotary table caused by the insufficient clamping pressure of the clamping oil cylinder of the rotary worktable. When the rotary workbench works normally, the rotary workbench is in a clamping state, the normally closed contact of the contactor is in a disconnecting state, the alarm main circuit formed by the series connection is in an open circuit state, the alarm lamp does not work, and at the moment, the rotary workbench cannot generate angle deviation due to sufficient clamping pressure of the clamping oil cylinder; when the swivel work head can not normally work, the swivel work head is in non-clamping state, and contactor normally open contact and contactor normally closed contact are in the closure state simultaneously, the warning main line that the series connection formed is in the access state, and the alarm lamp begins work, begins to pipe the scintillation and reports to the police, and at this moment, swivel work head leads to its emergence angular deflection because of the not enough clamping pressure who presss from both sides tight hydro-cylinder.
(3) When the rotary worktable is in a non-clamping state due to a fault, the hydraulic pressure of the clamping oil cylinder is lower than the set value of the pressure relay, the pressure relay converts the detected oil cylinder pressure value into an electric signal and feeds the electric signal back to the normally closed contact of the intermediate relay to enable the coil of the intermediate relay to lose power, the normally closed contact of the contactor is closed, an alarm system circuit formed by serially connecting the normally closed contact of the contactor, the normally open contact of the contactor and an alarm lamp is in a passage state, and the alarm lamp begins to ring and flash to alarm.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Claims (5)
1. An alarm device for automatically detecting the deflection of the angle of a rotary worktable is characterized by comprising: the high-pressure oil pipe is communicated with the clamping oil cylinder through the pressure reducing valve, the electromagnetic reversing valve and the one-way valve in sequence, a pressure relay is installed on the high-pressure oil pipe between the electromagnetic reversing valve and the one-way valve, and the pressure relay detects the hydraulic pressure of the clamping oil cylinder by converting a pressure signal into an electric signal; pressure relay is connected with auxiliary relay normally open contact and auxiliary relay normally closed contact respectively to according to the size of the pressure signal that detects, to auxiliary relay normally open contact and auxiliary relay normally closed contact send the signal of telecommunication, the break-make of auxiliary relay normally open contact control contactor normally open contact, the break-make of auxiliary relay normally closed contact control contactor normally closed contact, the alarm lamp with contactor normally open contact, contactor normally closed contact establish ties for the switching of the on-off state control alarm lamp through contactor normally open contact and contactor normally closed contact represents clamping cylinder's clamping state, and then the revolving stage angle change that the representation swivel work head leads to because of clamping cylinder's the clamping pressure is not enough.
2. The alarm device for automatically detecting the angle deflection of the rotary worktable according to claim 1, which is characterized by further comprising an oil return pipe and a hydraulic gauge, wherein the oil return pipe is arranged on the electromagnetic reversing valve, and the hydraulic gauge is arranged on a high-pressure oil pipe between the pressure reducing valve and the electromagnetic reversing valve.
3. The warning device for automatically detecting the angular deflection of the rotary worktable as claimed in claim 1, wherein the warning lamp sounds and flashes.
4. The warning device for automatically detecting the angular deflection of the rotary worktable as claimed in claim 1, wherein the rotary worktable is a common rotary worktable of a floor type boring and milling machine.
5. Use of a warning device for automatic detection of the angular deflections of a rotating table according to any of claims 1-4, comprising the following steps:
(1) When the rotary workbench is opened, a rotary workbench motor-pump set is started, a high-pressure oil pipe is adopted to supply oil to the clamping oil cylinder through a pressure reducing valve, an electromagnetic directional change valve and a one-way valve, meanwhile, a pressure relay converts a pressure signal into an electric signal and transmits the electric signal to a normally open contact of an intermediate relay to electrify a coil of the intermediate relay, and the normally open contact of a contactor is closed;
(2) When the pressure relay detects that the hydraulic pressure of the clamping oil cylinder is greater than the set value of the pressure relay, the pressure relay converts a pressure signal into an electric signal and transmits the electric signal to the normally closed contact of the intermediate relay to electrify the coil of the intermediate relay, the normally closed contact of the contactor is disconnected, at the moment, the pressure of the clamping oil cylinder is normal, the rotary workbench is in a clamping state, the rotary workbench works normally, the circuit of the alarm system is in a disconnection state, and the alarm lamp does not work;
(3) When the rotary worktable is in a non-clamping state due to a fault, the hydraulic pressure of the clamping oil cylinder is lower than the set value of the pressure relay, the pressure relay converts the detected pressure value of the clamping oil cylinder into an electric signal and feeds the electric signal back to the normally closed contact of the intermediate relay to enable the coil of the intermediate relay to lose power, the normally closed contact of the contactor is closed, an alarm system circuit formed by serially connecting the normally closed contact of the contactor, the normally open contact of the contactor and the alarm lamp is in a path state, and the alarm lamp starts to ring and flash to alarm.
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| CN201710230646.2A CN106826260B (en) | 2017-04-10 | 2017-04-10 | Alarm device for automatically detecting angle deflection of rotary worktable |
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| CN109048465A (en) * | 2018-08-27 | 2018-12-21 | 宁夏共享精密加工有限公司 | A kind of vertical lathe ram is anti-to rub warning device |
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| JPH0684033B2 (en) * | 1988-06-13 | 1994-10-26 | 株式会社新潟鐵工所 | Abnormal start prevention device for hydraulic pump for injection molding machine |
| CN104325297B (en) * | 2013-10-30 | 2017-02-15 | 柳州正菱重型数控机床有限公司 | Clamping device of boring-milling machine |
| CN203817874U (en) * | 2014-05-05 | 2014-09-10 | 东莞鸿图精密压铸有限公司 | Anti-collision control system of numerical control machine tool |
| CN104400458B (en) * | 2014-11-21 | 2017-02-01 | 广东鸿图南通压铸有限公司 | Method and system capable of controlling automatic clamping of pneumatic fixture and preventing mistakes |
| CN207239694U (en) * | 2017-04-10 | 2018-04-17 | 宁夏共享精密加工有限公司 | The warning device that a kind of automatic detection rotary work-table angle deflects |
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