CN112377477A - Double-feed precision driving device for main sliding block of numerical control cold ring rolling machine - Google Patents

Double-feed precision driving device for main sliding block of numerical control cold ring rolling machine Download PDF

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Publication number
CN112377477A
CN112377477A CN202011422470.9A CN202011422470A CN112377477A CN 112377477 A CN112377477 A CN 112377477A CN 202011422470 A CN202011422470 A CN 202011422470A CN 112377477 A CN112377477 A CN 112377477A
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China
Prior art keywords
oil
main
oil cylinder
sliding block
booster
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CN202011422470.9A
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Chinese (zh)
Inventor
陈社伟
张裴松
张国标
付志强
申高峰
王少华
周增强
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Henan Zhiyuan Bearing Technology Co ltd
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Henan Zhiyuan Bearing Technology Co ltd
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Priority to CN202011422470.9A priority Critical patent/CN112377477A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H1/00—Making articles shaped as bodies of revolution
    • B21H1/06—Making articles shaped as bodies of revolution rings of restricted axial length
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/08—Servomotor systems incorporating electrically operated control means

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

The invention discloses a double-feed precision driving device for a main sliding block of a numerical control cold rolling ring machine, and relates to the field of metal pressure machining cold rolling rings. The double-feed precision driving device for the main sliding block of the numerical control cold rolling ring comprises a bidirectional main oil cylinder for driving the main sliding block to move, a main oil pump for supplying oil to the main oil cylinder, and a detection device for detecting the moving position of the main sliding block, wherein a rodless cavity of the bidirectional main oil cylinder is communicated with a servo booster oil pump, and the servo booster oil pump supplies oil to the rodless cavity of the main oil cylinder during precision feeding. According to the numerical control cold-rolling ring main sliding block double-feed precision driving device, hydraulic oil pushes a main oil cylinder piston to work leftwards, the stability of a machine tool is improved, the problems of poor stability of the machine tool and low quality of a cold-rolling formed workpiece are solved, when an electromagnetic valve electromagnet is in a 1YV + (electrified) state and a 2YV- (uncharged) state, system pressure oil enters the main oil cylinder at low pressure to push the main oil cylinder piston to idle and feed fast, a servo booster oil pump controls work to work slowly, and the problems that the speed is suddenly changed during machining and a motor is not suitable are solved.

Description

Double-feed precision driving device for main sliding block of numerical control cold ring rolling machine
Technical Field
The invention relates to the field of metal pressure machining cold rolling rings, in particular to a main sliding block double-feed precision driving device of a numerical control cold rolling ring machine.
Background
The cold rolling is a cold working forming method for continuously and locally performing plastic deformation on annular rotary parts in a rolling wheel and core roller forming die cavity at normal temperature so as to obtain parts close to finished products.
The power for rolling the ring is realized by a pair of supporting wheels arranged on a sliding block and pushed by a piston rod of an oil cylinder to push a core roller, the rolling force required by cold rolling forming is usually more than 20000kg, the idle stroke feeding speed is 20-30 m m/s, the working speed is 0.05-0.1 m m/s, the current mainly uses hydraulic pressure to provide power, the speed control is controlled by an electro-hydraulic proportional speed regulating valve, in the actual production, as the temperature of hydraulic oil is continued along with the working time, the oil temperature is increased, the variation amplitude of the feeding speed from 0.05m m/s to 25 m m/s is large, the phenomenon of nonlinear crawling at low speed is often caused, the input current and the output flow of the proportional valve are not proportional, and the stability of a machine tool is poor.
The invention relates to a medium and large numerical control ring cold rolling machine tool with the application number of CN201618824U, which is researched and designed by scientific and technological development Limited company of Henan Chuan, the whole cold rolling process is used for replacing a proportional valve, the stability of the machine tool is greatly improved compared with the proportional valve, but when the idle stroke feeding speed is 20-30 m m/s and the working speed is 0.05-0.1 m m/s, the speed difference is hundreds of times, if the whole device meets a large speed and also meets a relatively small speed, the problem of mismatching exists, so the device can be suitable for both a large speed and a small speed, and the invention provides a double-feeding precision driving device for the main sliding block of the numerical control cold rolling machine.
Disclosure of Invention
The invention aims to solve the technical problems that the working speed has large variation range, the stability of a machine tool is poor, the quality of a cold rolling formed workpiece is low, the difference between the idle stroke feeding speed and the working speed is too large, and a motor is not suitable for speed mutation, and provides a double-feed precision driving device for a main sliding block of a numerical control cold rolling ring machine.
The object of the invention is achieved in the following way:
a double-feed precision driving device for a main sliding block of a numerical control cold rolling ring machine comprises a bidirectional main oil cylinder for driving the main sliding block to move, a main oil pump for supplying oil to the main oil cylinder, and a detection device for detecting the moving position of the main sliding block, wherein a rodless cavity of the bidirectional main oil cylinder is communicated with a servo booster oil pump, and the servo booster oil pump supplies oil to the rodless cavity of the main oil cylinder during precision feeding.
When precise feeding is carried out, the servo booster oil pump supplies oil to the main oil cylinder rodless cavity, namely, the rod cavity of the main oil cylinder is communicated with one oil outlet of the two-position four-way electromagnetic reversing valve, the other oil outlet of the two-position four-way electromagnetic reversing valve is communicated with an oil inlet of the two-position three-way electromagnetic reversing valve, and the oil outlet of the two-position three-way electromagnetic reversing valve is respectively communicated with the main oil cylinder rodless cavity and the servo booster oil pump through a three-way pipe; the two-position four-way electromagnetic directional valve, the two-position three-way electromagnetic directional valve, the main oil cylinder, the detection device and the servo booster oil pump are respectively connected with the controller, when precise feeding is carried out, the oil outlet of the two-position three-way electromagnetic directional valve is closed, and only the servo booster oil pump supplies oil to the rodless cavity of the main oil cylinder.
The servo booster oil pump is a servo booster oil pump body, one end of the servo booster oil pump body is provided with an oil inlet and an oil outlet, the other end of the servo booster oil pump body extends into a booster pump piston, and one end of a servo electric push rod is connected with the booster pump piston.
The diameter of the main oil cylinder piston is 2-6 times of the diameter of the booster pump piston.
The diameter of the main oil cylinder piston is 2.5 times of that of the booster pump piston.
The detection device for detecting the moving position of the main sliding block is a proximity switch, and the proximity switch is connected with the controller.
A double-feed precision driving method for a main sliding block of a numerical control cold ring rolling machine comprises the following steps:
(1) when the electromagnet of the two-position four-way electromagnetic directional valve electromagnetic valve is in a 1YV + state and the electromagnet of the two-position three-way electromagnetic directional valve is in a 2 YV-uncharged state, system pressure oil enters the main oil cylinder through the rodless cavity of the oil cylinder with a low pressure of 20kg/cm, pushes a piston of the main oil cylinder to move rapidly, meanwhile, pressure oil enters the servo booster oil pump, pushes the piston of the booster pump to return to a right end limit position, and the servo booster oil pump is filled with the pressure oil;
(2) when the main sliding block enters a working position, a proximity switch for detecting the position of the main sliding block sends a signal, the two-position four-way electromagnetic directional valve electromagnet is continuously in a 1YV + electrified state, meanwhile, the two-position three-way electromagnetic directional valve electromagnet is 2YV + electrified to cut off a main oil path, and at the moment, the servo electric push rod pushes a booster pump piston to move, so that the servo booster oil pump and the main oil cylinder form a closed oil cavity, and under the pushing of the booster pump piston, hydraulic oil pushes the main oil cylinder piston to perform working feeding leftwards to perform ring rolling;
(3) when the ring rolling is finished, the electromagnet 1 YV-of the two-position four-way electromagnetic directional valve loses power, hydraulic oil enters through a rod cavity of the main oil cylinder, the piston of the main oil cylinder is pushed to return quickly, hydraulic oil in a rodless cavity of the main oil cylinder is pushed to enter a servo booster oil pump cavity, redundant oil flows back to an oil tank through the electromagnetic valve and returns quickly at the same time, and one cycle is completed.
Compared with the prior art, the double-feed precision driving device for the main sliding block of the numerical control cold rolling ring machine can detect that a proximity switch at the position of the main sliding block sends a signal when the main sliding block is fast idle and the main sliding block is in a working position, the two-position four-way electromagnetic reversing valve electromagnet is continuously in a 1YV + electrified state, the two-position three-way electromagnetic reversing valve electromagnet is 2YV + electrified simultaneously to cut off a main oil path, the booster pump piston is pushed to move by the servo electric push rod, the hydraulic oil pushes the main oil cylinder piston to work and feed leftwards under the pushing of the booster pump piston, the feeding speed is stable, the stability of a machine tool is greatly improved, the quality of a cold rolling forming workpiece is high, the problems of large working speed change amplitude, poor stability of the machine tool and low quality of the cold rolling forming workpiece are solved, meanwhile, the device is matched with the booster pump, when, in a 2YV- (uncharged) state, system pressure oil enters the main oil cylinder through the oil cylinder rodless cavity at a low pressure (20 kg/cm), pushes the main oil cylinder piston to move fast to perform idle stroke fast feeding, and performs working advance at a slow speed under the control of the servo booster oil pump, so that the problems of sudden speed change and motor maladaption during processing are solved.
Drawings
FIG. 1 is a schematic diagram of a hydraulic control system of a main slider double-feed precision driving device of a numerical control cold ring rolling machine.
The system comprises an oil tank 1, a quantitative hydraulic pump 2, a filter 3, a stop valve 4, a pressure gauge 5, a check valve 6, a check valve 7, a two-position four-way electromagnetic directional valve 8, a two-position three-way electromagnetic directional valve 9, a master cylinder 10, a master cylinder piston 11, a servo booster oil pump 12, a booster pump piston 13, a servo electric push rod 14, a piston rod 15, a guide sleeve 16 and a guide piston 17.
Detailed Description
Example 1:
as shown in the attached figure 1, the double-feed precision driving device for the main sliding block of the numerical control cold ring rolling machine comprises a bidirectional main oil cylinder 10 for driving the main sliding block to move and a detection device for detecting the position of the main sliding block, wherein a rodless cavity of the bidirectional main oil cylinder 10 is communicated with a servo booster oil pump 12, and oil is supplied to the rodless cavity of the main oil cylinder 10 by the servo booster oil pump 12 during precision feeding.
When precise feeding is carried out, the servo booster oil pump 12 supplies oil to the rodless cavity of the main oil cylinder 10, namely the rod cavity of the main oil cylinder 10 is communicated with one oil outlet of the two-position four-way electromagnetic reversing valve 8, the other oil outlet of the two-position four-way electromagnetic reversing valve 8 is communicated with the oil inlet of the two-position three-way electromagnetic reversing valve 9, and the oil outlet of the two-position three-way electromagnetic reversing valve 9 is respectively communicated with the rodless cavity of the main oil cylinder 10 and the servo booster oil pump 12 through a three-way; the two-position four-way electromagnetic directional valve 8, the two-position three-way electromagnetic directional valve 9, the main oil cylinder 10, the detection device and the servo booster oil pump 12 are respectively connected with the controller, when precise feeding is carried out, the oil outlet of the two-position three-way electromagnetic directional valve 9 is closed, and only the servo booster oil pump 12 supplies oil to the rodless cavity of the main oil cylinder 10.
The servo booster oil pump 12 is a servo booster oil pump body, one end of the servo booster oil pump body is provided with an oil inlet and an oil outlet, the other end of the servo booster oil pump body extends into a booster pump piston 13, one end of a servo electric push rod 14 is connected with the booster pump piston 13, the servo electric push rod 14 is a transmission mechanism and driving mechanism combination, the servo electric push rod 14 converts the rotary motion into linear motion, and the servo electric push rod 14 can accurately control the rotating speed, the rotating speed and the torque, convert the accurate torque into-accurate speed, position and thrust; the high-precision linear motion system realizes a brand new product of a high-precision linear motion series, and performs closed-loop servo control, wherein the control precision reaches 0.01 mm; the thrust is precisely controlled, a pressure sensor is added, the control precision can reach 1%, a servo electric cylinder is low in noise, energy-saving, clean, high in rigidity, impact-resistant, ultra-long in service life and simple in operation and maintenance, the servo electric push rod 14 can be free of faults in a severe environment, the protection grade can reach IP66, long-term work can be achieved, high strength, high speed, high precision positioning, stable movement and low noise can be achieved, the servo electric push rod 14 can be widely applied to the automobile industry, the electronic industry, the mechanical automation industry, the equipment assembly line industry and the like, the servo electric push rod 14 only needs to be regularly greased and lubricated when working in a complex environment, no wearing parts need to be maintained and replaced, a large amount of after-sale service cost is reduced compared with a hydraulic system and a pneumatic system, the most important point is that the servo electric push rod 14 is easily connected with control systems such as a PLC and the like to, the servo motor is not adopted, mainly because the closed-loop control of position, speed and torque is realized, the problem of step loss of the step motor is solved, the low-speed operation is stable, the step operation phenomenon similar to the step motor cannot be generated in the low-speed operation, the dynamic corresponding time of the acceleration and the deceleration of the motor is short, generally within dozens of milliseconds, in brief, the common motor is usually seen, after the power failure, the servo motor can rotate for a while again due to the inertia of the servo motor and then stop, the servo motor and the step motor stop when stopping and walk when speaking, the reaction is extremely fast, but the step loss phenomenon exists in the step motor, so the servo motor is adopted.
The diameter of the main oil cylinder piston is 2-6 times of the diameter of the booster pump piston, and the diameter of the main oil cylinder piston is 2.5 times of the diameter of the booster pump piston. The practical pressure is increased by 2.5 =6.25 times, the line speed is easier to control by PLC, the PLC is a programmable logic controller, a digital operation controller for automatic control with a microprocessor can load control instructions into a memory at any time for storage and execution, the programming controller consists of a CPU, an instruction and data memory, an input/output interface, a power supply, a digital-analog conversion and other functional units, the early programmable logic controller has only a logic control function and is named as a programmable logic controller, later along with the continuous development, the computer modules with simple functions at the beginning already have various functions including logic control, sequential control, analog control, multi-computer communication and the like, the name is also changed into the programmable logic controller, and the PLC mostly adopts a single-chip microcomputer, so the integration level is high, and the corresponding protection circuit and self-diagnosis function are added, the reliability of the system is improved, one of the biggest advantages of the PLC is that corresponding templates can be directly connected with devices (such as buttons, switches, sensing current transmitters, motor starters or control valves and the like) in an industrial field aiming at different field signals (such as direct current or alternating current, switching values, digital values or analog values, voltage or current and the like) and are connected with a CPU mainboard through a bus.
The driving method of the numerical control cold ring rolling machine main sliding block double-feed precision driving device comprises the following steps:
(1) when the electromagnet of the two-position four-way electromagnetic directional valve 8 is at 1YV +, the electromagnet of the two-position three-way electromagnetic directional valve 9 is at 2 YV-uncharged state, the system pressure oil enters the main oil cylinder 10 through the oil cylinder rodless cavity with a low pressure of 20kg/cm, pushes the main oil cylinder piston 11 to move rapidly, meanwhile, the pressure oil enters the servo booster oil pump 12, pushes the booster pump piston 13 to return to the right end limit, and the servo booster oil pump 12 is filled with the pressure oil;
(2) when the main sliding block is in a working position, a proximity switch for detecting the position of the main sliding block sends a signal, the electromagnet of the two-position four-way electromagnetic directional valve 8 is continuously in a 1YV + electrified state, meanwhile, the electromagnet of the two-position three-way electromagnetic directional valve 9 is electrified by 2YV +, a main oil path is cut off, at the moment, the booster pump piston 13 is pushed by the servo electric push rod 14 to move, in this case, the servo booster oil pump 12 and the main oil cylinder 10 form a closed oil cavity, and under the pushing of the booster pump piston 13, hydraulic oil pushes the main oil cylinder piston 11 to perform working feeding leftwards to perform ring rolling;
(3) after ring rolling is finished, the electromagnet 1 YV-of the two-position four-way electromagnetic directional valve 8 loses power, hydraulic oil enters through a rod cavity of the main oil cylinder 10, the piston 11 of the main oil cylinder is pushed to return quickly, hydraulic oil in a rodless cavity of the main oil cylinder 10 is pushed to enter a cavity of the servo booster oil pump 12, redundant oil flows back to the oil tank 1 through the electromagnetic valve, and meanwhile, the hydraulic oil returns quickly to complete one cycle.
The numerical control cold ring rolling machine main sliding block double-feed precision driving device adopts a quantitative hydraulic pump, the oil suction and the oil discharge are fixed at the same rotating speed, and compared with other hydraulic systems, the numerical control cold ring rolling machine main sliding block double-feed precision driving device has the advantage of easiness in operation and control, and has the advantage of long service life because an oil outlet is directly communicated with an oil tank, and pressure cannot exist for a long time; the system adopts the two-position four-way electromagnetic directional valve to control the hydraulic system to control the main oil way, when the valve fails, the rod cavity of the oil cylinder cannot return oil to the oil tank under the condition that the rodless cavity is not continuously pressurized, and the rod cavity generates ultrahigh pressure under the pressurization effect of the oil cylinder, so that the safety of the system is improved; the two-position four-way reversing valve is adopted to control the working process, the vibration and noise caused by the fact that the two-position four-way reversing valve is firstly opened and the three-position four-way reversing valve is then opened due to the difference of the response speeds of the reversing valves do not exist, high pressure is generated when a valve port is not opened, and the vibration and noise generated by pressure release when the valve port is opened are reduced, the control steps are reduced, the continuity of the working process and the change speed of the working process are increased, the complexity of a system pipeline is reduced, the length of the pipeline is reduced, the resistance of system oil returning to an oil tank is reduced, the working speed is improved, moreover, compared with the three-position four-way reversing valve, the two-position four-way reversing valve has the advantage of low cost, a main oil path is controlled by the two-position four-way electromagnetic reversing valve, and a magnetic reversing valve is installed to, causing large deviations in size.
The working process of the invention is as follows: firstly, an electromagnet of an electromagnetic valve of a two-position four-way electromagnetic directional valve 8 is in a 1YV + charged state, an electromagnet of a two-position three-way electromagnetic directional valve 9 is in a 2 YV-uncharged state, system pressure oil enters a main oil cylinder 10 through an oil cylinder rodless cavity at a low pressure of 20kg/cm, a main oil cylinder piston 11 is pushed to move rapidly, meanwhile, the pressure oil enters a servo booster oil pump 12, a booster pump piston 13 is pushed to return to a right end limit position, and the servo booster oil pump 12 is filled with the pressure oil; then the main slide block is fast idle, when the main slide block enters the working position, a proximity switch for detecting the position of the main slide block sends a signal, the electromagnet of the two-position four-way electromagnetic directional valve 8 is continuously in a 1YV + electrified state, meanwhile, the electromagnet of the two-position three-way electromagnetic directional valve 9 is electrified by 2YV +, a main oil path is cut off, at the moment, the booster pump piston 13 is pushed by the servo electric push rod 14 to move, in this case, the servo booster oil pump 12 and the main oil cylinder 10 form a closed oil cavity, and under the pushing of the booster pump piston 13, hydraulic oil pushes the main oil cylinder piston 11 to perform working feeding leftwards to; when the ring rolling is finished, the electromagnet 1 YV-of the two-position four-way electromagnetic directional valve 8 is powered off, hydraulic oil enters through a rod cavity of the main oil cylinder 10, the piston 11 of the main oil cylinder is pushed to return quickly, hydraulic oil in a rodless cavity of the main oil cylinder 10 is pushed to enter a cavity of the servo booster oil pump 12, redundant oil flows back to the oil tank 1 through the electromagnetic valve, and meanwhile, the hydraulic oil returns quickly to complete one cycle.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the overall concept of the present invention, and these should also be considered as the protection scope of the present invention.

Claims (7)

1. A double-feed precision driving device for a main sliding block of a numerical control cold rolling ring machine comprises a bidirectional main oil cylinder for driving the main sliding block to move, a main oil pump for supplying oil to the main oil cylinder, and a detection device for detecting the moving position of the main sliding block.
2. The numerical control cold ring rolling machine main slide block double-feed precision driving device as claimed in claim 1, wherein when precision feeding is performed, a servo booster oil pump supplies oil to a main oil cylinder rodless cavity, namely, a rod cavity of a main oil cylinder is communicated with one oil outlet of a two-position four-way electromagnetic directional valve, the other oil outlet of the two-position four-way electromagnetic directional valve is communicated with an oil inlet of a two-position three-way electromagnetic directional valve, and the oil outlet of the two-position three-way electromagnetic directional valve is respectively communicated with the main oil cylinder rodless cavity and the servo booster oil pump through a three-way pipe; the two-position four-way electromagnetic directional valve, the two-position three-way electromagnetic directional valve, the main oil cylinder, the detection device and the servo booster oil pump are respectively connected with the controller, when precise feeding is carried out, the oil outlet of the two-position three-way electromagnetic directional valve is closed, and only the servo booster oil pump supplies oil to the rodless cavity of the main oil cylinder.
3. The main slider double-feed precision driving device of the numerical control cold ring rolling machine as claimed in claim 1, wherein the servo booster oil pump is a servo booster oil pump body, one end of the servo booster oil pump body is provided with an oil inlet and an oil outlet, the other end of the servo booster oil pump body extends into the booster pump piston, and one end of the servo electric push rod is connected with the booster pump piston.
4. The double-feed precision driving device for the main sliding block of the numerical control cold ring rolling machine as claimed in claim 1, wherein the diameter of the piston of the main oil cylinder is 2-6 times of the diameter of the piston of the booster pump.
5. The double-feed precision driving device for the main sliding block of the numerical control cold ring rolling machine as claimed in claim 4, wherein the diameter of the piston of the main oil cylinder is 2.5 times of the diameter of the piston of the booster pump.
6. The double-feed precision driving device for the main sliding block of the numerical control cold ring rolling machine according to claim 1, wherein the detection device for detecting the moving position of the main sliding block is a proximity switch, and the proximity switch is connected with the controller.
7. A double-feed precision driving method for a main sliding block of a numerical control cold ring rolling machine comprises the following steps:
(1) when the electromagnet of the two-position four-way electromagnetic directional valve electromagnetic valve is in a 1YV + state and the electromagnet of the two-position three-way electromagnetic directional valve is in a 2 YV-uncharged state, system pressure oil enters the main oil cylinder through the rodless cavity of the oil cylinder with a low pressure of 20kg/cm, pushes a piston of the main oil cylinder to move rapidly, meanwhile, pressure oil enters the servo booster oil pump, pushes the piston of the booster pump to return to a right end limit position, and the servo booster oil pump is filled with the pressure oil;
(2) when the main sliding block enters a working position, a proximity switch for detecting the position of the main sliding block sends a signal, the two-position four-way electromagnetic directional valve electromagnet is continuously in a 1YV + electrified state, meanwhile, the two-position three-way electromagnetic directional valve electromagnet is 2YV + electrified to cut off a main oil path, and at the moment, the servo electric push rod pushes a booster pump piston to move, so that the servo booster oil pump and the main oil cylinder form a closed oil cavity, and under the pushing of the booster pump piston, hydraulic oil pushes the main oil cylinder piston to perform working feeding leftwards to perform ring rolling;
(3) when the ring rolling is finished, the electromagnet 1 YV-of the two-position four-way electromagnetic directional valve loses power, hydraulic oil enters through a rod cavity of the main oil cylinder, the piston of the main oil cylinder is pushed to return quickly, hydraulic oil in a rodless cavity of the main oil cylinder is pushed to enter a servo booster oil pump cavity, redundant oil flows back to an oil tank through the electromagnetic valve and returns quickly at the same time, and one cycle is completed.
CN202011422470.9A 2020-12-08 2020-12-08 Double-feed precision driving device for main sliding block of numerical control cold ring rolling machine Pending CN112377477A (en)

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Application Number Priority Date Filing Date Title
CN202011422470.9A CN112377477A (en) 2020-12-08 2020-12-08 Double-feed precision driving device for main sliding block of numerical control cold ring rolling machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011422470.9A CN112377477A (en) 2020-12-08 2020-12-08 Double-feed precision driving device for main sliding block of numerical control cold ring rolling machine

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CN112377477A true CN112377477A (en) 2021-02-19

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