CN202263914U

CN202263914U - Die-casting machine die-locking oil path system

Info

Publication number: CN202263914U
Application number: CN2011203389386U
Authority: CN
Inventors: 李胜林
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-09-10
Filing date: 2011-09-10
Publication date: 2012-06-06
Anticipated expiration: 2021-09-10

Abstract

A die-casting machine die-locking oil path system comprises an oil tank, a die-locking oil cylinder and a hydraulic pump drive motor, characterized in that: the hydraulic pump is a dual high, low pressure pump, wherein the high pressure pump is connected with an oil inlet of an electromagnetic directional valve of the die-locking oil cylinder directly by a main oil path; the low pressure pump is connected with a low pressure oil path, a one-way cartridge valve is arranged on the low pressure oil path, thus the low pressure oil path is incorporated into the main oil path; the low pressure oil path is also provided with a cartridge overflow valve connection oil-return path controlled by an electromagnetic guide valve and a low pressure cover plate adjustment valve. The die-casting machine die-locking oil path system has the following beneficial effects: 1, the operations of the high, low pressure pumps are automatically controlled by an PLC control system, thus the proper pressure and flow rate are provided to the system and under the premise of ensuring the die-locking force, the die switching speed is increased; 2, the pressure and the flow rate are reasonably controlled and a large amount of long-time experiments by the applicant verify that: an 2000T die-casting machine is used as an example, the operation energy consumption of the system is reduced from 18.5KW/h to 11KW/h and the energy saving effect is very obvious.

Description

Die casting machine locked mode oil piping system

Technical field

The utility model relates to mechanical equipment technical field, specifically belongs to a die casting machine locked mode oil piping system.

Background technology

Die casting be a kind of at a high speed, under the hyperbaric environment and can produce the manufacturing process of the die casting motlten metal of accurate, attractive in appearance, stable cast article.Compare with plastic working such as forging or extruding or cut and low pressure casting, die casting has the remarkable advantage that in short operation consuming time together, forms the finished parts of complicated shape.Though the aforementioned relatively several kinds of technologies of production efficiency are to have improved greatly, people are endless for the pursuit of efficient.Improving die casting production efficiency is a system engineering, must set about from many aspects, as method of smelting, molten metal pass on, die casting machine is arranged with the peripheral equipment operation, the reasonable distribution of each operation productive temp, the mould Fast Installation with keep in repair fast etc.And among the number of ways that improves die casting machine production efficiency, shortening the idle loop time is a very basic effective way.And to shorten the idle loop time, lock, the opening speed that wherein improves die casting machine is a most key ring, because lock, the shared time of die sinking is about half of die casting machine idle loop time.

Therefore, how many die casting machines production firm improves on the lock opening speed of die casting machine is constantly studied intensively and improves, and has also obtained certain effect.Up to the present, three kinds of methods of domestic main employing improve lock, opening speed: first kind, through strengthening oil pump capacity; Second kind, through increasing lock, die sinking accumulator; The third, through increase lock, die sinking accumulator locked mode is differential.But these three kinds of methods all exist weak point:

1, first method after strengthening oil pump capacity, under the constant prerequisite of pressure fuel pump, must strengthen the power of Oil pump electrical machinery, and along with the increasing of power of motor, energy consumption also increases thereupon.For example, clamp force 800T die casting machine, join treble pump+45KW motor match well duplex pump+37KW motor at lock, want fast on the opening speed really, also increased much but the machine energy consumption is corresponding, increased production cost on the contrary.

2, second method, it need not increase oil pump capacity, but through near the locked mode oil circuit, increasing an accumulator, utilizes the die casting machine stand-by time in advance hydraulic oil to be stored up in the accumulator, when lock, die sinking again in the moment injecting lock mould oil cylinder.Though this method need not increase oil pump capacity and power of motor, its extra oil pump energy storage time that increased, simultaneously, machine can loss-rate not add wanting greatly of accumulator.

Mode-locking oil cylinder rod chamber hydraulic oil oil sump tank not when 3, the third method, its principle are quick locked modes, but pass back in the rodless cavity.Because of the Mode-locking oil cylinder rodless cavity flows into two strands of hydraulic oil (another road is from oil pump) simultaneously, so locked mode speed is obviously accelerated, this principle can abbreviate as differential.It need not increase oil pump capacity, does not also increase energy storage time, but can only increase locked mode speed, and can not increase opening speed.

The utility model content

The purpose of the utility model is in order to overcome the shortcoming that prior art exists, a kind of raising folding mould speed to be provided, reduce motor power consumption, prolonging the die casting machine locked mode oil piping system of motor service life and saves energy.

The utility model is realized with the following methods: a kind of die casting machine locked mode oil piping system; Comprise fuel tank; Mode-locking oil cylinder and hydraulic pump drive motor is characterized in that: described hydraulic pump is the duplex high-low pump, and high-pressure pump directly is connected with Mode-locking oil cylinder solenoid directional control valve oil-in through working connection;

Described low-lift pump is connected with the low pressure oil circuit, and the low pressure oil circuit is provided with unidirectional inserted valve, makes the low pressure oil circuit incorporate working connection into;

The plug-in mounting overflow valve that described low pressure oil circuit also is provided with by electromagnetic priority valve and low cover clamp control valve control connects oil return line.

Described electromagnetic priority valve (11) connects into PLC control system.

The beneficial effect of the utility model is: 1, utilize PLC control system to control high-low pump work automatically, for system provides suitable pressure and flow, under the prerequisite that guarantees clamp force, improve folding mould speed.2, reasonable controlled pressure and flow experiment showed, in a large number for a long time that through the applicant with the 200T die casting machine be example, use native system work energy consumption to be reduced to 11KW/h by original 18.5KW/h, and energy-saving effect is very obvious.

Description of drawings

Fig. 1 is the oil piping system sketch map of the utility model.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is done concrete further explanation.

As shown in the figure; A kind of die casting machine locked mode oil piping system comprises fuel tank 6, Mode-locking oil cylinder 1 and hydraulic pump drive motor 8; It is characterized in that: described hydraulic pump is the duplex high-low pump, and high-pressure pump 5 directly is connected with Mode-locking oil cylinder solenoid directional control valve 2 oil-ins through working connection 12;

Described low-lift pump 7 is connected with low pressure oil circuit 13, and low pressure oil circuit 13 is provided with unidirectional inserted valve 4, makes low pressure oil circuit 13 incorporate working connection 12 into;

The plug-in mounting overflow valve 9 that described low pressure oil circuit 13 also is provided with by electromagnetic priority valve 11 and low cover clamp control valve 10 controls connects oil return line 14.

Described electromagnetic priority valve 11 connects into PLC control system.

Operation principle: well-known, in the hydraulic system, the pressure of system depends on load, and load is heavy, and then pressure is big, and gently then pressure is little in load.In the practical application of die casting machine, in die sinking and matched moulds process, load is lighter, so the time that needs big flow to improve open-close module enhances productivity.And in the mould pressure maintaining period, just needing bigger pressure, required on the contrary flow is very little.In the tradition die casting machine, all used high-pressure pump in order to guarantee clamp force, so the electric energy of its required consumption is very big, and operating efficiency is very low.The utility model is little according to the big flow of high-pressure pump pressure, and the principle that the low-lift pump flow is big adds ripe PLC control technology; The utility model adopts the high-low pressure duplex pump; In the process of system's matched moulds and die sinking, PLC makes electromagnetic priority valve 11 outages, and pilot valve is closed plug-in mounting overflow valve 9; Regulate low cover clamp control valve 10 control pressure unloadings greater than system pressure; Making low-lift pump 7 fluid overcome unidirectional inserted valve 4 pressure remittance working connection is that Mode-locking oil cylinder 1 provides high-volume hydraulic oil, improves Mode-locking oil cylinder 1 movement velocity, enhances productivity.

When the locked mode pressurize, system needs higher pressure, and required flow is very little so high-pressure pump 5 can be competent at fully.So plug-in mounting overflow valve 9 is opened in 11 energisings of PLC control electromagnetic priority valve, the low-lift pump off-load, unidirectional inserted valve 4 is closed, and reduces power consumption thereby reduce motor 8 loads, wherein overflow valve 3 control working connection maximum pressures.

Reasonable controlled pressure and flow experiment showed, in a large number for a long time that through the applicant with the 200T die casting machine be example in the utility model, use native system work energy consumption to be reduced to 11KW/h by original 18.5KW/h, and energy-saving effect is very obvious, is suitable for extensively promoting the use of.

Claims

1. die casting machine locked mode oil piping system; Comprise fuel tank (6); Mode-locking oil cylinder (1) and hydraulic pump drive motor (8); It is characterized in that: described hydraulic pump is the duplex high-low pump, and high-pressure pump (5) directly is connected with Mode-locking oil cylinder solenoid directional control valve (2) oil-in through working connection (12);

Described low-lift pump (7) is connected with low pressure oil circuit (13), and low pressure oil circuit (13) is provided with unidirectional inserted valve (4), makes low pressure oil circuit (13) incorporate working connection (12) into;

The plug-in mounting overflow valve (9) that described low pressure oil circuit (13) also is provided with by electromagnetic priority valve (11) and low cover clamp control valve (10) control connects oil return line (14).

2. die casting machine locked mode oil piping system according to claim 1 is characterized in that: described electromagnetic priority valve (11) connects into PLC control system.