Relay control circuit of deep hole drilling and boring machine and deep hole drilling and boring machine thereof

Abstract

The invention provides a relay control circuit of a deep hole drilling and boring machine. The relay control circuit of the deep hole drilling and boring machine comprises a starter, a first motor and a second motor, the starter is electrically connected with a power bus; the first motor is used for cutting of a cutter of the deep hole drilling machine, the first motor is electrically connected with the power supply bus through a first relay, and the first motor is electrically connected with the starter; and the second motor is used for feeding a cutter of the deep hole drilling machine, the second motor is electrically connected with the power supply bus through a second relay, and the second motor is electrically connected with the starter. The plurality of motors are controlled through the starter, so that the relay control circuit is applied to the deep hole drilling and boring machine, and the technical problem that the relay control circuit for the deep hole drilling and boring machine, which is integrally improved aiming at the defects of a control circuit, is lacked in the prior art is solved.

Description

Technical field:

[0001] The invention relates to the technical field of deep hole boring and drilling machines, in particular to a deep hole boring and drilling machine relay control circuit and the deep hole boring and drilling machine. Background technology:

[0002] The T2120 deep hole drilling and boring machine is a deep hole processing equipment produced in the 1980s. It is mainly used for deep hole processing of mechanized bridge upper and lower column tubes. The total length is 13 meters. Since the equipment has been used for more than 30 years, and the electrical part has never been overhauled or modified accordingly, the following problems occur:

[0003] 1) Due to technical constraints, the control logic of machine tool circuits more than 30 years ago was implemented by old-fashioned relay control circuits. Simple control requirements require complex relay control circuits to complete, which have poor stability, high failure rate, and inconvenient maintenance.

[0004] 2) The lines are seriously aged and messy.

[0005] 3) The control components are old-fashioned, large in size and poor in performance, and some have been out of production for more than 20 years, becoming a maintenance bottleneck.

[0006] 4) Due to the long history and many repairs, some functions and protection circuits were omitted and there was no written record of any modification, which made the control logic chaotic. This caused inconvenience to maintenance and buried hidden dangers to the operator's personal safety. In addition, due to the limitations of technical conditions at the time, each protection function was single and had poor sensitivity.

[0007] 5) The feed DC motor is driven by a driver board assembled with old domestic discrete transistors. Due to the fluctuation of external temperature and power supply voltage, the transistor amplifier circuit has zero drift phenomenon, resulting in unstable feed speed and difficult to guarantee product quality.

[0008] 6) The switching process of the star-delta step-down starting of the 30KW main motor has a certain impact on the mechanical part and the power grid, and the failure rate of the old star-delta starting circuit is relatively high.

[0009] There is an urgent need for a deep hole drilling and boring machine relay control circuit, which helps to solve the technical problem of the prior art that there is a lack of a deep hole drilling and boring machine relay control circuit that is comprehensively improved with respect to the shortcomings of the control circuit. Summary of the invention:

[0010] In one embodiment, the present invention provides a relay control circuit for a deep hole drilling and boring machine, which controls multiple motors through a starter to achieve its application in a deep hole drilling and boring machine, helping to solve the technical problem in the prior art that there is a lack of a relay control circuit for a deep hole drilling and boring machine that comprehensively improves the shortcomings of the control circuit.

[0011] The deep hole drilling and boring machine relay control circuit includes a starter, a first motor, and a second motor;

[0012] The starter is electrically connected to the power bus;

[0013] The first motor is used for tool cutting of a deep hole drilling machine, the first motor is electrically connected to the power bus through a first relay, and the first motor is electrically connected to the starter;

[0014] The second motor is used for tool feeding of a deep hole drilling machine. The second motor is electrically connected to the power bus through a second relay, and the second motor is electrically connected to the starter.

[0015] In one embodiment, the deep hole drilling and boring machine relay control circuit further includes a third motor;

[0016] The third motor is electrically connected to the power bus through a third relay for supplying lubricating oil.

[0017] In one embodiment, the U1 pin of the starter is electrically connected to the U pin through the first AC contactor, and the U pin is electrically connected to the first motor;

[0018] The V1 pin of the starter is electrically connected to the V pin through the second AC contactor, and the V pin is electrically connected to the first motor;

[0019] The W1 pin of the starter is electrically connected to the W pin through the third AC contactor, and the W pin is electrically connected to the first motor;

[0020] An ammeter is used to measure the current between the V1 pin and the V pin.

[0021] In one embodiment, the deep hole boring and drilling machine relay control circuit includes a thermal overload relay;

[0022] The thermal overload relay is connected in series between the second motor and the second relay.

[0023] In one embodiment, a fourth AC contactor is connected in series between the thermal overload relay and the second relay.

[0024] In one embodiment, a fifth AC contactor is connected in series between the third motor and the third relay;

[0025] The sixth AC contactor is connected in parallel at both ends of the fifth AC contactor.

[0026] In one embodiment, the deep hole drilling and boring machine relay control circuit further includes a driver;

[0027] The driver is electrically connected to the starter, and the driver is electrically connected to the power bus for power supply.

[0028] In one embodiment, the deep hole drilling and boring machine relay control circuit further includes a PLC programmable controller;

[0029] The PLC programmable controller is electrically connected to the starter and is used to control the first motor and the second motor, and is electrically connected to the third motor.

[0030] In one embodiment, the first motor, the second motor, and the third motor are 380V.

[0031] In one embodiment, the present invention further provides a deep hole boring machine having a deep hole boring machine relay control circuit, wherein the deep hole boring machine includes the deep hole boring machine relay control circuit. Description of the drawings:

[0032] Figure 1 It is a schematic diagram of a relay control circuit of a deep hole drilling and boring machine in one embodiment of the present invention;

[0033] Figure 2 A schematic diagram of programmable controller pins in another embodiment of the present invention;

[0034] Figure 3 A schematic diagram of a DC driver in another embodiment of the present invention;

[0035] Figure 4 This is a schematic diagram of a first working timing sequence in another embodiment of the present invention;

[0036] Figure 5 A schematic diagram of a second working sequence in another embodiment of the present invention;

[0037] Figure 6 A schematic diagram of a third working timing sequence in another embodiment of the present invention;

[0038] Figure 7 This is a schematic diagram of a fourth working timing sequence in another embodiment of the present invention;

[0039] Figure 8 This is a schematic diagram of a new circuit in another embodiment of the present invention.

[0040] Reference numerals:

[0041] Launcher 1

[0042] First Motor 2

[0043] First relay 3

[0044] Second motor 4

[0045] Second relay 5

[0046] The third motor 6

[0047] The third relay 7

[0048] First AC contactor 8

[0049] Second AC contactor 9

[0050] Power bus 10

[0051] The third AC contactor 101

[0052] Ammeter 102

[0053] Thermal overload relay 103

[0054] Fourth AC contactor 104

[0055] Fifth AC contactor 105

[0056] Sixth AC contactor 106

[0057] U1 pin 11

[0058] U pin 12

[0059] V1 pin 13

[0060] V pin 14

[0061] W1 pin 15

[0062] W pin 16

[0063] Drive 100

[0064] PLC Programmable Controller 200 Specific embodiment:

[0065] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0066] Various aspects and features of the present application are described herein with reference to the accompanying drawings.

[0067] These and other characteristics of the present application will become apparent from the following description of a preferred form of embodiment given as a non-limiting example with reference to the accompanying drawings.

[0068] It should also be understood that, although the present application has been described with reference to some specific examples, those skilled in the art will be able to realize many other equivalent forms of the present application that have the features described in the claims and are therefore within the scope of protection defined thereby.

[0069] The above and other aspects, features and advantages of the present application will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings.

[0070] Specific embodiments of the present application are described hereinafter with reference to the accompanying drawings; however, it should be understood that the embodiments applied for are merely examples of the present application, which may be implemented in a variety of ways. Well-known and / or repeated functions and structures are not described in detail to determine the true intent based on the user's historical operations and to avoid unnecessary or redundant details that make the present application unclear. Therefore, the specific structural and functional details applied for herein are not intended to be limiting, but are merely used as the basis and representative basis for the claims to teach those skilled in the art to use the present application in a variety of ways with substantially any suitable detailed structure.

[0071] This specification may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," all of which may refer to one or more of the same or different embodiments according to the present application.

[0072] Figure 1 It is a schematic diagram of a relay control circuit of a deep hole drilling and boring machine in one embodiment of the present invention; Figure 2 A schematic diagram of programmable controller pins in another embodiment of the present invention; Figure 3 FIG. 1 is a schematic diagram of a DC driver in another embodiment of the present invention. Figure 4 This is a schematic diagram of a first working timing sequence in another embodiment of the present invention; Figure 5 A schematic diagram of a second working sequence in another embodiment of the present invention;

[0073] Figure 6 A schematic diagram of a third working timing sequence in another embodiment of the present invention; Figure 7 This is a schematic diagram of a fourth working timing sequence in another embodiment of the present invention; Figure 8 This is a schematic diagram of a new circuit in another embodiment of the present invention.

[0074] like Figures 1 to 8 As shown, in one embodiment, the present invention provides a deep hole drilling and boring machine relay control circuit, the deep hole drilling and boring machine relay control circuit includes a starter 1, a first motor 2, and a second motor 4;

[0075] The starter 1 is electrically connected to the power bus 10;

[0076] A first motor 2, used for tool cutting of a deep hole drilling machine, the first motor 2 is electrically connected to a power bus 10 via a first relay 3, and the first motor 2 is electrically connected to a starter 1;

[0077] The second motor 4 is used for tool feeding of the deep hole drilling machine. The second motor 4 is electrically connected to the power bus 10 through the second relay 5 , and the second motor 4 is electrically connected to the starter 1 .

[0078] Starter 1 has a fault output terminal, a programming output terminal, a bypass output terminal, an instantaneous stop common output terminal, a start terminal, a stop terminal, a DC4-20MA output terminal, an RS485 communication terminal, an X12 operating status output terminal, and a COM output terminal.

[0079] The power bus 10 includes a live wire L1, a live wire L2, and a live wire L3, as well as an N neutral wire and a PE ground wire.

[0080] In one embodiment, the deep hole drilling and boring machine relay control circuit further includes a third motor 6;

[0081] The third motor 6 is used for supplying lubricating oil, and the third motor 6 is electrically connected to the power bus 10 via the third relay 7 .

[0082] In one embodiment, the U1 pin 11 of the starter 1 is electrically connected to the U pin 12 through the first AC contactor 8, and the U pin 12 is electrically connected to the first motor 2;

[0083] The V1 pin 13 of the starter 1 is electrically connected to the V pin 14 through the second AC contactor 9, and the V pin 14 is electrically connected to the first motor 2;

[0084] The W1 pin 15 of the starter 1 is electrically connected to the W pin 16 through the third AC contactor 101, and the W pin 16 is electrically connected to the first motor 1;

[0085] An ammeter 102 is used to measure the current between the V1 pin 13 and the V pin 14 .

[0086] In one embodiment, the deep hole drilling and boring machine relay control circuit includes a thermal overload relay 103;

[0087] The thermal overload relay 103 is connected in series between the second motor 4 and the second relay 5 .

[0088] In one embodiment, a fourth AC contactor 104 is connected in series between the thermal overload relay 103 and the second relay 5 .

[0089] In one embodiment, a fifth AC contactor 105 is connected in series between the third motor 6 and the third relay 7;

[0090] The sixth AC contactor 106 is connected in parallel to both ends of the fifth AC contactor 105 .

[0091] In one embodiment, the deep hole drilling and boring machine relay control circuit further includes a driver 100;

[0092] The driver 100 is electrically connected to the starter 1 , and the driver 100 is electrically connected to the power bus 10 for power supply.

[0093] It has a speed and current measurement port, a drive normal port, a port connected to the driver 100 through a sliding rheostat, a motor commutation port, and is implemented through switch logic, a speed measuring motor port, an excitation winding port, and an armature winding.

[0094] In one embodiment, the deep hole drilling and boring machine relay control circuit further includes a PLC programmable controller 200;

[0095] The PLC programmable controller 200 is electrically connected to the starter and is used to control the first motor 2 and the second motor 4 , as well as the third motor 6 .

[0096] The PLC programmable controller 200 has a start / stop terminal, an instantaneous stop terminal, a standby terminal, a feed main power closing terminal, and a feed start terminal.

[0097] And it has a COM control switch for controlling the working sequence of the motor.

[0098] In one embodiment, the first motor 2 , the second motor 4 , and the third motor 6 are 380V.

[0099] In one embodiment, the present invention further provides a deep hole boring machine having a deep hole boring machine relay control circuit, wherein the deep hole boring machine includes the deep hole boring machine relay control circuit.

[0100] In one embodiment, the present invention further provides a deep hole boring machine control method having a deep hole boring machine relay control circuit, the control method comprising:

[0101] The control steps are spindle start, spindle stop, spindle and spindle lubrication thermal protection, spindle brake output, and spindle start star-delta delay;

[0102] There is a spindle start three-star delay, spindle star auxiliary or spindle start triangle delay, spindle angle auxiliary between the spindle start and the spindle stop process; and there is the process logic of spindle start and spindle start auxiliary;

[0103] Spindle stop, spindle start auxiliary, spindle delay time, spindle delay time before braking;

[0104] The spindle delay time and the spindle pre-braking delay time are separated by a spindle pre-braking delay sequence time, a spindle delay time, and a spindle braking output;

[0105] The delay sequence time before spindle braking and the spindle delay time have a spindle delay time setting;

[0106] The spindle jogs, the spindle brakes, and the spindle starts;

[0107] Spindle angle output, feed stop, feed excitation overcurrent detection, pallet fast forward, pallet fast retract, feed overload alarm, feed start conditions;

[0108] Forward feed start, forward feed limit, feed start condition, reverse feed auxiliary, forward feed output;

[0109] There is a forward feed output between the forward feed start and the forward feed limit;

[0110] Reverse feed start, reverse feed limit, feed start condition, forward feed output, reverse feed auxiliary;

[0111] Reverse feed assist is inserted between the reverse feed start and the reverse feed limit;

[0112] Reverse feed assist, forward feed output, reverse feed output;

[0113] The reverse feed assist and the forward feed output are inserted into the reverse feed jog;

[0114] Cooling pump start, cooling pump stop, cooling pump hot, cooling pump No. 1;

[0115] Oil pump start button, oil pump stop button, oil pump thermal protection, oil pump motor working output;

[0116] Insert the working output of the oil pump motor between the oil pump start button and the oil pump stop button;

[0117] Workpiece clamping button, workpiece release, oil pump motor working output, solenoid valve release output, workpiece clamping auxiliary;

[0118] The workpiece clamping button is loosened from the workpiece and inserted into the workpiece clamping aid;

[0119] Workpiece clamping auxiliary, workpiece clamping auxiliary, pressure gauge high pressure contact, solenoid valve release output, solenoid valve tightening output;

[0120] A pressure gauge low-pressure contact and a solenoid valve top-tightening output are inserted between the workpiece clamping auxiliary and the workpiece clamping auxiliary;

[0121] Workpiece clamping assistance, workpiece clamping indication output;

[0122] Positive feed output, feed overload detection, feed overload assistance;

[0123] Insert reverse feed output between forward feed output and feed overload detection;

[0124] After the feed overload detection, the feed overload alarm and feed overload assistance are performed;

[0125] Spindle and spindle lubrication thermal protection, feed overload alarm output;

[0126] Cooling pump thermal protection and cooling failure alarm output;

[0127] Oil pump, heat pump, and oil pump fault alarm output.

[0128] Beneficial effects:

[0129] 1) The use of PLC simplifies the entire circuit while improving control requirements. The whole machine control logic runs inside the PLC in the form of a program, which is neat and clean, with stable performance, low failure rate and easy maintenance.

[0130] 2) Update all circuits of the machine tool so that the overall insulation performance is the same as that of a new machine tool.

[0131] 3) Standardized selection of components greatly reduces maintenance cycles.

[0132] 4) The redesign of the control program has restored and strengthened the relevant usage functions and protection functions, and the newly added alarm functions provide direct guidance for maintenance personnel to lock the fault point in the first time.

[0133] 5) According to the actual use of the DC feed motor, the parameters of the Eurotherm 590C driver are reasonably set to effectively protect the feed motor. The use of speed feedback makes the motor output speed and torque very stable, ensuring the product processing quality.

[0134] 6) Reasonable setting of soft starter parameters enables smooth starting of the main shaft 30KW motor, effectively avoiding the impact of sudden acceleration of the motor on the machinery and power grid during star-delta conversion of the original circuit. The setting of protection parameters ensures the safety of the motor.

[0135] 7) The market price of the mechanical and electrical overhaul of this equipment is about 200,000 yuan, and the total price of our internal overhaul is more than 70,000 yuan. (The market price of the 13-meter-long T2120 deep hole drilling and boring machine produced by the original Dezhou Machine Tool Factory is about 700,000 yuan)

[0136] 8) In this project, the new technologies such as the Eurofins 590 drive, three-phase soft starter, and starter can be widely used in the transformation of old equipment, with a small amount of investment to minimize the cost.

[0137] Through major renovations, the equipment failure rate can be greatly reduced and easy to find, with complete protection functions and improved stability. Product quality, equipment and personnel safety are effectively guaranteed, and production efficiency is greatly improved with relatively small cost investment.

[0138] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A deep hole drilling and boring machine relay control circuit, characterized in that: The deep hole drilling and boring machine relay control circuit comprises: A starter (1) electrically connected to the power bus (10); A first motor (2) for tool cutting of a deep hole drilling machine, wherein the first motor (2) is electrically connected to the power bus (10) via a first relay (3), and the first motor (2) is electrically connected to the starter (1); A second motor (4) is used for tool feeding of a deep hole drilling machine. The second motor (4) is electrically connected to the power bus (10) via a second relay (5). The second motor (4) is electrically connected to the starter (1).

2. The deep hole drilling and boring machine relay control circuit according to claim 1, characterized in that: The deep hole drilling and boring machine relay control circuit also includes: A third motor (6) is used for supplying lubricating oil, and the third motor (6) is electrically connected to the power bus (10) via a third relay (7).

3. The deep hole drilling and boring machine relay control circuit according to claim 2, characterized in that: The U1 pin (11) of the starter (1) is electrically connected to the U pin (12) via the first AC contactor (8), and the U pin (12) is electrically connected to the first motor (2); The V1 pin (13) of the starter (1) is electrically connected to the V pin (14) via the second AC contactor (9), and the V pin (14) is electrically connected to the first motor (2); The W1 pin (15) of the starter (1) is electrically connected to the W pin (16) via the third AC contactor (101), and the W pin (16) is electrically connected to the first motor (2); An ammeter (102) is used to measure the current between the V1 pin (13) and the V pin (14).

4. The deep hole drilling and boring machine relay control circuit according to claim 3, characterized in that: The deep hole drilling and boring machine relay control circuit comprises: A thermal overload relay (103) is connected in series between the second motor (4) and the second relay (5).

5. The deep hole drilling and boring machine relay control circuit according to claim 4, characterized in that: A fourth AC contactor (104) is connected in series between the thermal overload relay (103) and the second relay (5).

6. The deep hole drilling and boring machine relay control circuit according to claim 5, characterized in that: A fifth AC contactor (105) is connected in series between the third motor (6) and the third relay (7); The sixth AC contactor (106) is connected in parallel to both ends of the fifth AC contactor (105).

7. The deep hole drilling and boring machine relay control circuit according to claim 6, characterized in that: The deep hole drilling and boring machine relay control circuit also includes: A driver (100) is electrically connected to the starter (1), and the driver (100) is electrically connected to the power bus (10) for power supply.

8. The deep hole drilling and boring machine relay control circuit according to claim 7, characterized in that: The deep hole drilling and boring machine relay control circuit also includes: A PLC programmable controller (200) is electrically connected to the starter (1) and is used to control the first motor (2) and the second motor (4), and is electrically connected to the third motor (6).

9. The deep hole drilling and boring machine relay control circuit according to claim 8, characterized in that: The first motor (2), the second motor (4), and the third motor (6) are 380V.

10. A deep hole boring machine having a deep hole boring machine relay control circuit, characterized in that: The deep hole boring and drilling machine comprises the deep hole boring and drilling machine relay control circuit as claimed in any one of claims 1 to 9.

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