CN203077665U - Control system for riveting device - Google Patents
Control system for riveting device Download PDFInfo
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- CN203077665U CN203077665U CN 201320044843 CN201320044843U CN203077665U CN 203077665 U CN203077665 U CN 203077665U CN 201320044843 CN201320044843 CN 201320044843 CN 201320044843 U CN201320044843 U CN 201320044843U CN 203077665 U CN203077665 U CN 203077665U
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- oil
- hydraulic cylinder
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Abstract
The utility model discloses a control system for a riveting device. The control system comprises a computer and further comprises a speed servo control return circuit, wherein the speed servo control return circuit comprises an oil tank, a hydraulic pump, a servo valve and a hydraulic cylinder, the hydraulic pump is connected with the servo valve through a one-way valve, and an oil inlet and an oil outlet of the hydraulic cylinder are connected with an oil outlet and an oil return port of the servo valve respectively. The oil tank is respectively connected with the hydraulic pump and the servo valve, and the servo valve is connected with the computer. The control system effectively improves quality stability and reliability of a bearing unit and reduces rejection rate.
Description
Technical field
The utility model relates to hydraulic pressure riveting installing and is equipped with technical field, particularly a kind of riveting installing control system fully that is used for.
Background technology
Pendulum rolles over that riveting machine has that riveting dress pressure is little, shockproof, noise is little, riveting parts quality height, the riveted joint time is short, clincher tool is simple, equipment cost is low with easily realize advantage such as automation control.In addition, pendulum grinds riveted joint as a cold worked important process technology, can deduct the heating process of part, and energy savings effectively reduces discharging.
In recent years,,, research and develop multiple new technology, make its prerequisite that can guarantee parts quality and reliability, save energy consumption again as much as possible and save production cost at auto industry field along with more and more higher to environmental protection requirement.Wherein, the assembling mode of the hub bearing of pendulum rolling riveting machine is exactly a typical example.Traditional hub-bearing unit is fixed on the hub spindle with the nut chucking, may cause serious accident if nut gets loose.And new hub-bearing unit has used the mode that axially suits to make the hub spindle top produce plastic deformation and has oppressed on the inner ring of hub bearing.This novel hub-bearing unit is not only more safe and reliable, and owing to reduced the chucking nut, can effectively make the bearing unit lightweight.Simultaneously, incorporate bearing unit can alleviate assembly work greatly, and significantly reduces the energy consumption in the vehicle traveling process, has reached the purpose of energy-saving and emission-reduction.
Pendulum is rolled over the pressing down speed and press down the quality that displacement has directly influenced bearing unit of die of riveting machine.The speed that presses down of the die that existing riveting installing is equipped with is constant, and the load to bearing unit is not fed back in the riveting process of assembling, excessive or the not enough phenomenon of local riveting force that the hub spindle uneven thickness that can not effectively prevent to cause owing to mismachining tolerance causes has had a strong impact on the reliability of axle riveting and the quality of bearing unit.
The utility model content
Utility model purpose of the present utility model is the technical deficiency that is equipped with at existing hydraulic pressure riveting installing, provide a kind of and be used for the riveting installing fully, especially be applied in the hub bearing assembly equipment, can carry out stepless speed regulation to the die speed of pressing down according to computer instruction, and the servo-control system that can compensate the speed of pressing down of die according to the force value of die feedback.
For realizing above-mentioned utility model purpose, the technical solution adopted in the utility model is:
A kind of control system that the riveting installing is equipped with that is used for is provided, comprise computer, also comprise the speed servo control loop, described speed servo control loop comprises fuel tank, hydraulic pump, servo valve and hydraulic cylinder, described hydraulic pump is connected with servo valve by check valve, and described hydraulic cylinder oil-in is connected with oil return opening with the oil-out of servo valve respectively with oil-out; Fuel tank is connected with hydraulic pump and servo valve respectively, and servo valve is connected with computer, and computer sends the flow control signal of servo valve;
Hydraulic cylinder is provided with displacement transducer, and this displacement transducer detects the displacement of hydraulic cylinder in real time, and displacement signal is sent to computer, and computer sends control signal corresponding;
Hydraulic cylinder is provided with pressure sensor, and this pressure sensor detects the load of hydraulic cylinder in real time, and pressure signal is sent to computer, and computer sends control signal corresponding.The pressure signal that described computer can send described pressure sensor compares with the desired pressure curve of presetting, and sends control signal corresponding according to comparing result;
Preferably, also comprise the pressure compensation loop, the pressure compensation loop comprises second reversal valve, pressure switch, accumulator, first reversal valve and first electricity liquid ratio relief valve that connects successively; Second reversal valve is connected with accumulator with hydraulic pump, and first electricity liquid ratio relief valve then is connected with the oil-in of hydraulic cylinder; First electricity liquid ratio relief valve, pressure switch, first reversal valve and second reversal valve all are connected with computer, and computer sends the station switching signal of pressure controling signal, first reversal valve and second reversal valve of first electricity liquid ratio relief valve.Pressure switch is used to detect energy storage pressure, and pressure signal is sent to described computer, by computer system is controlled.
Preferably, described first reversal valve and second reversal valve are the bi-bit bi-pass reversal valve.
Preferably, described speed servo control loop also comprises second electricity liquid ratio relief valve that is located between the hydraulic pump and second reversal valve, and the oil-in of described second electricity liquid ratio relief valve is connected with hydraulic pump, and oil-out is connected with fuel tank.Described second electricity liquid ratio relief valve is connected with computer and as the safety valve of system, the current signal decision that its oil pressure relief is provided by described computer.Ideal rate curve and desired pressure curve that the default riveting installing of computer is equipped with after comparing with the signal of displacement transducer and pressure sensor feedback, are controlled system.
Preferably, described servo valve is the 3-position 4-way servo valve.
The utility model has following beneficial effect with respect to prior art:
The utility model is with respect to prior art, riveting installing described in the utility model makes die press down with the ideal speed curve that computer sends by the speed servo control loop fully, in the process of pressing down, monitor the force value of die simultaneously, if the force value of die surpasses the allowed band of desired pressure curve, then compensate by the speed of pressing down of pressure compensation loop to system, the suffered load of workpiece is controlled in certain scope, prevent because the excessive or not enough phenomenon of riveting dress pressure that mismachining tolerance caused, the quality stability and the reliability of bearing unit have effectively been improved, the rate of reducing the number of rejects and seconds.
Description of drawings
Fig. 1 is that the utility model is used for the control system schematic diagram that the riveting installing is equipped with;
Fig. 2 is a system block diagram of the present utility model;
Among the figure: the 101-fuel tank; The 102-hydraulic pump; The 103-hydraulic cylinder; The 104-servo valve; 105-second electricity liquid ratio relief valve; 201-first electricity liquid ratio relief valve; 202-first reversal valve; The 203-accumulator; The 204-pressure switch; 205-second reversal valve; The 301-displacement transducer; The 302-pressure sensor.
The specific embodiment
Below in conjunction with the drawings and specific embodiments utility model purpose of the present utility model is done to describe in further detail, embodiment can not give unnecessary details one by one at this, but therefore embodiment of the present utility model is not defined in following examples.Unless stated otherwise, the material and the processing method of the utility model employing are present technique field conventional material and processing method.
As shown in Figure 1, a kind ofly be used for the control system that riveting installing is equipped with, comprise the control die speed servo control loop that presses down of curve and die is carried out during above desired pressure curve allowed band pressure compensation loop, computer, displacement transducer 301 and the pressure sensor 302 of velocity compensation when the workpiece force value at a predetermined velocity.The signal of transmission such as rate curve that computer is predetermined and desired pressure scope curve and displacement transducer 301, pressure sensor 302, pressure switch 204 produces control signal corresponding to servo valve 104,202,205 and proportional pressure control valve 105,202, and this control system control die assembles bearing unit.In the present embodiment, die is by the piston actuated of hydraulic cylinder 103; The system works principle is with reference to Fig. 2.
As shown in Figure 1, this speed servo control loop comprises fuel tank 101, hydraulic pump 102, hydraulic cylinder 103, servo valve 104 and second electricity liquid ratio relief valve 105.
This servo valve 104 is the 3-position 4-way servo valve, and its four interfaces are connected with fuel tank 101, hydraulic pump 102, hydraulic cylinder 103 epicoeles 1031 and hydraulic cylinder cavity of resorption 1032 respectively, and wherein oil-in and hydraulic pump 102 are connected by check valve.The open condition of this servo valve 104, can be carried out stepless time adjustment and change the direction of motion by the open condition of control servo valve 104 by computer control the motion of hydraulic cylinder 103.
Second electricity liquid ratio relief valve 105 is as the safety valve of system, and its safe pressure value is by the given current signal decision of computer.The oil-in of second electricity liquid ratio relief valve 105 is connected with hydraulic pump 102, and oil-out is connected with fuel tank 101; The pressure compensation loop is other to be connected on the speed servo control loop, comprise first electricity liquid ratio relief valve 201, first reversal valve 202, accumulator 203, pressure switch 204 and second reversal valve 205, its function is: when die load surpasses desired pressure curve allowed band, by the first electricity liquid ratio relief valve overflow or accumulator the hydraulic cylinder repairing is controlled at die load in the proper range.The opening pressure value of this first electricity liquid ratio relief valve 201 is by the given current signal decision of computer.This first electro-hydraulic proportion reversing valve is used for surpassing on the desired pressure in limited time when die pressure, and the Open valve overflow reduces the flow that enters hydraulic cylinder 103 and then the load of die is controlled in the proper range.
The force value that accumulator 203 is used for working as die is system's repairing less than prescribing a time limit under the desired pressure, increases the flow that enters hydraulic cylinder 103, and then improves die load and also control in the reasonable scope.
In order to make the pressure compensation loop not influence the normal operation of speed servo control loop, this pressure compensation loop has also comprised first reversal valve 202, this first reversal valve 202 is the bi-bit bi-pass solenoid directional control valve, have two stations up and down, the speed servo control loop is carried out under the pressure compensated situation not needing, this first reversal valve 202 is in station, this moment accumulator 203 and hydraulic cylinder 103 not conductings of epicoele; Station under needs carry out under the pressure compensated situation the speed servo control loop, and this first reversal valve 202 is in, accumulator 203 and hydraulic cylinder 103 epicoele conductings are hydraulic cylinder 103 epicoele fuel feeding with hydraulic pump 102.
In order to make accumulator 203 guarantee enough energy, this pressure compensation loop has also comprised the pressure switch 204 and second reversal valve 205, when pressure switch 204 detects the force value of accumulator 203 when not enough, send signal to computer, by the station of computer control second reversal valve, thereby make hydraulic pump 102 be accumulator 203 makeup energy.This second reversal valve 205 is the bi-bit bi-pass solenoid directional control valve, two stations about having, and when it was in left station, the oil-out of hydraulic pump 102 was connected with the hydraulic fluid port of accumulator 203; When it was in right working position, the hydraulic fluid port of the oil-out of hydraulic pump 102 and accumulator 203 was isolated mutually, no longer conducting.The above-mentioned concrete course of action of mentioning each valve will be discussed in aftermentioned.
For the load of the position that can detect die and die so that allow computer send control signal corresponding, displacement transducer 301 and pressure sensor 302 also have been installed on die simultaneously.
A kind of control system that the riveting installing is equipped with that is used for described in the utility model, its working condition can be divided into normal operation, pressurized overflow, low pressure repairing and accumulator are oil-filled excessively.Below describe each operating mode and the concrete course of action thereof of this control system respectively in detail:
(1) normal operation: servo valve 104 is adjusted the valve openings degree according to the given rate curve that presses down of computer, thereby the flow that enters hydraulic cylinder 103 and then makes die press down with the given rate curve of computer according to obeying the given rate curve of computer.Die is when pressing down, and displacement transducer 301 and pressure sensor 302 feed back the signal of displacement and pressure in real time to computer.When the riveting of setting in displacement transducer 301 detected displacement signals and the computer stops displacement when consistent, computer sends the control signal of pressure release backhaul for servo valve 104, makes hydraulic cylinder 103 begin backhauls and enter next working cycles.During this time, the current signal of first proportional pressure control valve be computer according to the determined signal of telecommunication of desired pressure upper limit curve, the current signal of second electricity liquid ratio relief valve is the given a certain constant current signal of computer.First, second reversal valve is in station respectively, goes up station and right working position.
(2) cross pressurized overflow: the pressure signal of displacement correspondence is prescribed a time limit above the going up of desired pressure curve of computer settings arbitrarily in the riveting process of assembling, hydraulic oil backs down the valve of first electro-hydraulic proportional servo valve 201, part fluid flows back to fuel tank by first electricity liquid ratio relief valve 201, when the system pressure value is got back to normal range (NR) once more, first electricity liquid ratio relief valve 201 is closed, and die continues to keep the given rate curve of computer to press down.Under this operating mode, the station state of first, second reversal valve is the same with the station state of normal operation.
(3) low pressure repairing: the pressure signal of any displacement correspondence is lower than following the prescribing a time limit of desired pressure curve of computer settings in pressure sensor 302 detected riveting process of assembling, computer sends control instruction, make first reversal valve 202 switch to down station from last station, accumulator 203 is given hydraulic cylinder 103 epicoele fuel feeding simultaneously with hydraulic pump 102.When force value was got back to normal range (NR) once more, computer sends control signal made first reversal valve switch back upward station once more, and accumulator 203 stops to hydraulic cylinder 103 epicoele fuel feeding.
(4) accumulator is oil-filled: when pressure switch 204 detects the force value deficiency of accumulator 203, computer sends control signal, servo valve 104 is switched back meta, hydraulic pump 102 temporarily stops to the hydraulic cylinder fuel feeding, simultaneously, second reversal valve 205 switches to left station from right working position, and hydraulic pump 102 gives accumulator 203 oil-filled.Reply just often when the force value of accumulator 203, pressure switch sends feedback signal to computer once more, and computer sends control signal, and second reversal valve 205 is switched back right working position, stop for accumulator 203 oil-filled.Simultaneously, servo valve 104 recovers normal open state, and hydraulic pump 102 continues as hydraulic cylinder 103 fuel feeding.
Relative prior art, the utility model can realize that die presses down with any desired rate curve, and in the riveting process of assembling the real-time load of monitoring die and die is pressed down speed compensate, thereby the suffered load of workpiece is controlled in certain scope, prevent because the excessive or not enough phenomenon of riveting dress pressure that mismachining tolerance caused, the quality stability and the reliability of bearing unit have effectively been improved, the rate of reducing the number of rejects and seconds.
The foregoing description is preferred embodiment of the present utility model only, is not to be used for limiting practical range of the present utility model.Be that all equalizations of being done according to the utility model content change and modification, all contained by the utility model claim scope required for protection.
Claims (5)
1. one kind is used for the control system that the riveting installing is equipped with, comprise computer, it is characterized in that: also comprise the speed servo control loop, described speed servo control loop comprises fuel tank, hydraulic pump, servo valve and hydraulic cylinder, and described hydraulic pump is connected with servo valve by check valve; Described hydraulic cylinder oil-in is connected with oil return opening with the oil-out of servo valve respectively with oil-out; Described fuel tank is connected with hydraulic pump and servo valve respectively, and described servo valve is connected with computer;
Hydraulic cylinder is provided with displacement transducer, and this displacement transducer detects the displacement of hydraulic cylinder in real time, and displacement signal is sent to computer, and computer sends control signal corresponding;
Hydraulic cylinder is provided with pressure sensor, and this pressure sensor detects the load of hydraulic cylinder in real time, and pressure signal is sent to computer, and computer sends control signal corresponding.
2. the riveting installing control system fully that is used for according to claim 1, it is characterized in that: also comprise the pressure compensation loop, the pressure compensation loop comprises second reversal valve, pressure switch, accumulator, first reversal valve and first electricity liquid ratio relief valve that connects successively; Second reversal valve is connected with accumulator with hydraulic pump, and first electricity liquid ratio relief valve then is connected with the oil-in of hydraulic cylinder; First electricity liquid ratio relief valve, pressure switch, first reversal valve and second reversal valve all are connected with computer.
3. the riveting installing control system fully that is used for according to claim 2, it is characterized in that: described first reversal valve and second reversal valve are the bi-bit bi-pass reversal valve.
4. the riveting installing control system fully that is used for according to claim 2, it is characterized in that: described speed servo control loop also comprises second electricity liquid ratio relief valve that is located between the hydraulic pump and second reversal valve, the oil-in of described second electricity liquid ratio relief valve is connected with hydraulic pump, and oil-out is connected with fuel tank; Described second electricity liquid ratio relief valve is connected with computer.
5. according to each described riveting installing control system fully that is used for of claim 1-4, it is characterized in that: described servo valve is the 3-position 4-way servo valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320044843 CN203077665U (en) | 2013-01-28 | 2013-01-28 | Control system for riveting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320044843 CN203077665U (en) | 2013-01-28 | 2013-01-28 | Control system for riveting device |
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| Publication Number | Publication Date |
|---|---|
| CN203077665U true CN203077665U (en) | 2013-07-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320044843 Expired - Fee Related CN203077665U (en) | 2013-01-28 | 2013-01-28 | Control system for riveting device |
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| Country | Link |
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| CN (1) | CN203077665U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103522584A (en) * | 2013-10-22 | 2014-01-22 | 严培义 | Quantitative oil supply system of undershoot springback device of powder forming machine |
| CN110370443A (en) * | 2019-08-15 | 2019-10-25 | 唐山贺祥机电股份有限公司 | High-pressure molding mud curve pressurizing device and method |
-
2013
- 2013-01-28 CN CN 201320044843 patent/CN203077665U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103522584A (en) * | 2013-10-22 | 2014-01-22 | 严培义 | Quantitative oil supply system of undershoot springback device of powder forming machine |
| CN103522584B (en) * | 2013-10-22 | 2015-05-13 | 宁波汇众粉末机械制造有限公司 | Quantitative oil supply system of undershoot springback device of powder forming machine |
| CN110370443A (en) * | 2019-08-15 | 2019-10-25 | 唐山贺祥机电股份有限公司 | High-pressure molding mud curve pressurizing device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130724 Termination date: 20160128 |
|
| EXPY | Termination of patent right or utility model |