CN108443240A - A kind of no pressurizing cylinder supercharging device and method - Google Patents

Abstract

The invention discloses a boosting device and method for a non-pressurized oil cylinder. The device includes an injection cylinder, a low-pressure pump group, a high-pressure variable pump group, a high-pressure accumulator and a fast accumulator; the front end of the injection cylinder is provided with a hammer front Valve, the hammer front valve is connected with a fast accumulator, the rear end of the injection cylinder is equipped with a hammer rear valve, the hammer rear valve is connected with a P-end oil supply port, and the P-end oil supply port is connected with a fast accumulator; the low-pressure pump group is connected There is a high-pressure variable pump group, which is connected to the HD1 energy storage valve, and the HD1 energy storage valve is connected to the high-pressure accumulator; the method includes: preparatory work for the injection part of the action, the first stage of slow action, the second stage Slow action, high speed action, boost action, follow out action, hammer back action. The structure of the device is simple, and the pressure building time can be increased to 12ms, which greatly improves the pressurization performance of the injection part of the large-scale die-casting machine, and solves the difficulty in the existing technology that the parameters of the die-casting machine cannot meet the casting process requirements of some precision products. Effectively improve the yield of products.

Description

A booster device and method without a booster cylinder

technical field

The invention relates to a pressure building oil circuit system, in particular to a booster device and method for a non-pressurized oil cylinder.

Background technique

Die-casting machine is one of the commonly used machines in the machinery industry. It is used to apply high-pressure die-casting to metal products, so the pressure build-up time and parameters are very important. The current national standard stipulates that the pressure building time for large machines is 25-30ms, but in fact the pressure building time of die casting machine manufacturers is above 30ms.

The injection action process of the die-casting machine is generally: a slow speed two-stage slow fast pressurized Hold pressure follow out Hammer back Injection complete. The most important of these is the "fast Supercharging” section, the connection process of this section requires the PLC to receive the position and pressure signals, and then the PLC outputs the signal to the booster solenoid valve coil after reaching the set value, and the solenoid valve coil pushes the solenoid valve spool to drain the control oil after the solenoid valve coil responds. At this time, the spool of the cartridge valve starts to respond. After the cartridge valve responds, it pushes the booster cylinder to start to move. During this process, the pressure generated by the booster cylinder and the direction of liquid flow are used to close the high and low pressure valves. During this process All actions require a certain response time, which delays the time from the end of rapid injection to the actual start of pressurization, causing the pressure build-up time of boost to be delayed, which seriously affects the actual action response time of pressurization.

For the parameter of pressure build-up time, the shorter the better, but limited to the impact of the structure of the pressurization method of the current die-casting machine, the booster pressure build-up time is greatly affected by external factors. For the needs of current production technology, the pressure building time of 30ms is not enough to meet some precision casting products; therefore, in order to improve the performance requirements of the machine, we need to make a further improvement plan on the pressurization method of the traditional die casting machine.

Contents of the invention

The object of the present invention is to provide a high-efficiency die-casting machine non-pressurized oil cylinder supercharging device and method with a simpler supercharging structure and faster pressure build-up to address the shortcomings of the prior art.

In order to solve the above technical problems, the following technical solutions are adopted:

A booster device without booster cylinder, including injection cylinder (Q), hammer front valve (V9), hammer rear valve (V10), low-pressure pump set (P1), high-pressure variable pump set (P2), HD1 energy storage Valve (V4), high-pressure accumulator (HD1) and fast accumulator (HD2); the front end of the injection cylinder (Q) is provided with a hammer front valve (V9), and the hammer front valve (V9) is connected with Fast accumulator (HD2), the rear end of the injection cylinder (Q) is provided with a hammer rear valve (V10), and the hammer rear valve (V10) is connected to a P-end oil supply port, and the P-end oil supply The port is connected to the fast accumulator (HD2); the low-pressure pump group (P1) is connected to the high-pressure variable pump group (P2), and the high-pressure variable pump group (P2) is connected to the HD1 energy storage valve (V4). The HD1 accumulator valve (V4) is connected with a high pressure accumulator (HD1).

Further, one end of the low-pressure pump set (P1) is connected to an oil filter (F1), the other end of the low-pressure pump set (P1) is connected to a cooler (C1), and the cooler (C1) is connected to a split flow valve (V1).

Further, one end of the high-pressure variable pump set (P2) is connected to a high-precision oil filter (F2), and the high-precision oil filter (F2) is connected to the cooler (C1), and the high-pressure variable pump set ( The other end of P2) is connected to the high-pressure pump set pressure feedback device (R1) and safety pressure control valve (V2).

Further, the high-pressure variable pump group (P2) is connected with a pressure safety valve (V5), the pressure safety valve (V5) is connected to the rear end of the injection cylinder (Q), and the pressure safety valve (V5) is connected to The injection cylinder has a rod chamber pressure detector (R5), and the injection cylinder has a rod chamber pressure detector (R5), which is connected with a front chamber throttle valve (V11) and a front chamber safety valve (V12).

Further, the high-pressure accumulator (HD1) is connected with HD1 safety oil drain valve (V6) and boost proportional valve (V7), and the boost proportional valve (V7) is connected with graded pressure relief valve (V8), so The grading relief valve (V8) is connected to the front end of the injection cylinder (Q).

Further, the high-pressure accumulator (HD1) is connected with an HD1 pressure control sensor (R2) and an HD1 pressure safety control valve (V15).

Further, the fast accumulator (HD2) is connected with an HD2 energy storage valve (V14), and the HD2 energy storage valve (V14) is connected with a hammer front valve (V9).

Further, the fast accumulator (HD2) is connected with an HD2 pressure control sensor (R3) and an HD2 pressure safety control valve (V16).

Further, the fast accumulator (HD2) is connected with a fast valve (V13), and the fast valve (V13) is connected with a pressure detector (R4) in the rodless chamber of the injection cylinder, and the pressure in the rodless chamber of the injection cylinder The detector (R4) is connected to the front end of the injection cylinder (Q).

A method for supercharging a non-pressurized oil cylinder: it is characterized in that it comprises the following steps:

(1) Preparatory work for the action of the injection part: determine whether the pressure of the high-pressure accumulator (HD1) and the fast accumulator (HD2) has reached the set value; at the same time, the low-pressure pump group (P1) is working, and the hydraulic oil is filtered The oil filter (F1) is coarsely filtered and then cooled by the cooler (C1). Part of the oil returns to the oil tank of the low-pressure pump unit (P1) through the diverter valve (V1), and the other part of the oil passes through the high-precision oil filter (F2). To the high-pressure variable pump group (P2); the hydraulic oil is supplied to the high-pressure variable pump group (P2) to store energy in the high-pressure accumulator (HD1) through the HD1 energy storage valve (V4).

(2) The first slow motion of the injection cylinder (Q): oil is supplied from the oil supply port at the P end of the system, the hammer front valve (V9) works and the stepped pressure relief valve (V8) works, and the oil supply speed is determined by the front chamber section The flow valve (V11) is controlled in real time, and the rest of the oil valves do not work.

(3) The second slow motion of the injection cylinder (Q): oil is supplied from the oil supply port at the P end of the system, the hammer front valve (V9) works and the stepped pressure relief valve (V8) works, and at the same time the fast accumulator (HD2 ) oil supply, quick valve (V13) and front cavity throttle valve (V11) work, the oil supply speed is controlled by the front cavity throttle valve (V11) in real time, the oil supply speed is adjusted according to the product process, and the rest of the oil valves do not work.

(4) High-speed action of the injection cylinder (Q): oil is supplied from the oil supply port at the P end of the system, the hammer front valve (V9) works and the stepped pressure relief valve (V8) works, and the fast accumulator (HD2) supplies oil at the same time. The fast valve (V13) and the front chamber throttle valve (V11) work, the oil supply speed is controlled by the front chamber throttle valve (V11) in real time, the oil supply speed is adjusted according to the product process, and the rest of the oil valves do not work.

(5) Boosting action: through the position detection of the injection piston rod and the pressure detector (R4) of the rodless chamber of the injection cylinder, the oil pressure of the rodless chamber of the injection cylinder is detected. When the set value is reached, the high pressure accumulator Oil supply to the energy device (HD1), the pressure boost proportional valve (V7) and the stepped pressure relief valve (V8) work, and the oil supply speed is adjusted according to the production process. .

(6) Follow-up action: oil is supplied by the fast accumulator (HD2), the fast valve (V13) and the stepped pressure relief valve (V8) work, and the front chamber throttle valve (V11) works at the same time, the oil supply speed of the follow-up control, and the remaining oil valves do not work.

(7) Hammer return action: Oil is supplied from the oil supply port at the P end of the system, the valve after the hammer (V10) works, the rest of the oil valves are in the normal position, the plunger starts to retreat, and when the return detection signal is issued, the hammer returns The action stops, and one injection cycle action is completed.

Owing to adopting above-mentioned technical scheme, have following beneficial effect:

The present invention is a non-pressurized oil cylinder supercharging device and method. The device has simple structure, rapid pressure build-up, novel design, and the pressure build-up time can be increased to 12ms, which greatly improves the boost pressure of the injection part of a large die-casting machine. performance, which solves the difficulty that the parameters of the die-casting machine in the prior art cannot meet the casting process requirements of some precision products, and effectively improves the yield of the product.

Compared with the booster device of conventional die-casting machines, this device cancels the booster cylinder and the booster isolation valve used to isolate the system during the booster process, and directly increases the pressure of the injection chamber of the system, making the pressure building method more direct and efficient. Fast, which has the advantages of simpler structure and shorter pressure building time.

Compared with the traditional die-casting machine, this method omits the pressure booster cylinder and high and low pressure isolation valves in structure, which makes the system structure simpler and lower failure rate, and can save the related pilot control valve, booster cylinder and high and low pressure isolation valves The response time of the pressurization method can make the injection force rise rapidly and reliably after the rapid injection is completed; in addition, a high-pressure relief valve is added to the rodless chamber of the injection cylinder to eliminate the pressure shock of the oil circuit system and make the piston The lever action is more stable, and the pressure building time is nearly 2 times faster than the traditional pressurization method.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing:

Fig. 1 is a structural schematic diagram of a non-pressurized oil cylinder supercharging device in the present invention.

Detailed ways

As shown in Figure 1, a booster without a booster cylinder includes injection cylinder (Q), hammer front valve (V9), hammer rear valve (V10), low-pressure pump set (P1), high-pressure variable pump set ( P2), HD1 energy storage valve (V4), high pressure accumulator (HD1) and fast accumulator (HD2); the front end of the injection cylinder (Q) is provided with a hammer front valve (V9), and the hammer front The valve (V9) is connected with a fast accumulator (HD2), and the rear end of the injection cylinder (Q) is provided with a hammer rear valve (V10), and the hammer rear valve (V10) is connected with a P-end oil supply port, The P-end oil supply port is connected to the fast accumulator (HD2); the low-pressure pump group (P1) is connected to a high-pressure variable pump group (P2), and the high-pressure variable pump group (P2) is connected to HD1 energy storage valve (V4), the HD1 accumulator valve (V4) is connected with a high pressure accumulator (HD1). The low-pressure pump set (P1) is an ordinary low-pressure vane pump, and its function is to provide oil suction base pressure for the high-pressure variable pump set (P2).

As an embodiment of the present invention, one end of the low-pressure pump set (P1) is connected to an oil filter (F1), and the other end of the low-pressure pump set (P1) is connected to a cooler (C1), and the cooler (C1 ) is connected with a diverter valve (V1).

As an embodiment of the present invention, one end of the high-pressure variable pump unit (P2) is connected to a high-precision oil filter (F2), and the high-precision oil filter (F2) is connected to the cooler (C1). The other end of the variable pump set (P2) is connected with a high pressure pump set pressure feedback device (R1) and a safety pressure control valve (V2).

As an embodiment of the present invention, the high-pressure variable pump group (P2) is connected with a pressure safety valve (V5), the pressure safety valve (V5) is connected to the rear end of the injection cylinder (Q), and the pressure safety valve (V5) is connected to the injection cylinder rod chamber pressure detector (R5), and the injection cylinder rod chamber pressure detector (R5) is connected to the front chamber throttle valve (V11) and the front chamber safety valve (V12).

As an embodiment of the present invention, the high-pressure accumulator (HD1) is connected with a HD1 safety oil drain valve (V6) and a boost proportional valve (V7), and the boost proportional valve (V7) is connected with a graded pressure relief valve ( V8), the stepped relief valve (V8) is connected to the front end of the injection cylinder (Q).

As an embodiment of the present invention, the high-pressure accumulator (HD1) is connected with an HD1 pressure control sensor (R2) and an HD1 pressure safety control valve (V15).

As an embodiment of the present invention, the fast accumulator (HD2) is connected with an HD2 energy storage valve (V14), and the HD2 energy storage valve (V14) is connected with a hammer front valve (V9).

As an embodiment of the present invention, the fast accumulator (HD2) is connected with an HD2 pressure control sensor (R3) and an HD2 pressure safety control valve (V16).

As an embodiment of the present invention, the fast accumulator (HD2) is connected with a fast valve (V13), and the fast valve (V13) is connected with a rodless chamber pressure detector (R4) of the injection cylinder, and the injection cylinder The rodless chamber pressure detector (R4) is connected to the front end of the injection cylinder (Q).

The working principle of this device: the low-pressure pump group (P1) supplies oil to the cooler (C1) after being roughly filtered by the oil filter (F1), and part of the hydraulic oil after passing through the cooler (C1) returns to it through the diverter valve (V1). The oil tank of the low-pressure pump set (P1) cools the oil in the entire hydraulic system, and the other part supplies oil to the high-pressure variable pump set (P2) through a high-precision oil filter (F2) to ensure that the high-pressure variable pump set (P2) The precision grade of the hydraulic oil provided is not lower than NAS7 grade, and the working pressure provided by the high-pressure variable pump unit (P2) can reach 420bar. At the outlet of the high-pressure variable pump set (P2), there is a high-pressure pump set pressure feedback device (R1) for pressure control and a safety pressure control valve (V2) for pressure safety protection. The high-pressure variable pump set (P2) only supplies pressure to the high-pressure accumulator (HD1 ) oil supply, where the energy storage of the high pressure accumulator (HD1) is controlled by the HD1 pressure control sensor (R2) controlling the HD1 energy storage valve (V4), and HD1 pressure is added to the oil end of the high pressure accumulator (HD1) for safety The control valve (V15) protects the highest accumulator pressure and the HD1 safety drain valve (V6) realizes pressure relief protection for the high-pressure accumulator (HD1) in an emergency. When the pressurization action is realized, there is no pressure through the injection cylinder When the pressure detected by the rod chamber pressure detector (R4) reaches the set value, the booster proportional valve (V7) is triggered to supply the high-pressure oil from the high-pressure accumulator (HD1) to the injection cylinder (Q), realizing direct injection of the injection piston rod. Apply high pressure to meet the injection force requirements required by the product. There are pressure detectors (R4) in the rodless cavity of the injection cylinder and the pressure in the rod cavity of the injection cylinder in both the injection rodless cavity and the injection rod cavity. The detector (R5) monitors the pressure in real time. This boosting method can make the injection force rise rapidly and reliably after the rapid injection is completed; in addition, a high-pressure pressure relief valve is added to the rodless chamber of the injection cylinder to eliminate the pressure of the oil circuit. The pressure shock of the system makes the piston rod move more smoothly.

Compared with the booster device of conventional die-casting machines, this device cancels the booster cylinder and the booster isolation valve used to isolate the system during the booster process, and directly increases the pressure of the injection chamber of the system, making the pressure building method more direct and efficient. Fast, which has the advantages of simpler structure and shorter pressure building time.

A method for supercharging a non-pressurized oil cylinder: it is characterized in that it comprises the following steps:

(1) Preparatory work for the action of the injection part: the computer confirms whether the pressure of the high-pressure accumulator (HD1) and the fast accumulator (HD2) has reached the set value; if it does not reach the set value, the system P The end oil supply port supplies oil, the HD2 energy storage valve (V14) stores energy, and the HD2 pressure control sensor (R3) controls the pressure value of the fast accumulator (HD2), and automatically stops when it reaches the set value.

At the same time, the low-pressure pump group (P1) is always working, the pressure value provided by the low-pressure pump group (P1) is 15-30bar, the hydraulic oil is roughly filtered by the oil filter (F1) and then cooled by the cooler (C1), Part of the oil returns to the oil tank of the low-pressure pump set (P1) through the diverter valve (V1) to achieve continuous cooling of the oil; the other part of the oil is supplied to the high-pressure variable pump set ( P2), at this time, the HD1 pressure control sensor (R2) feeds back the pressure to automatically adjust the high-pressure variable pump group (P2), the pressure safety value is controlled by the safety pressure control valve (V2), and the high-pressure variable pump group (P2) provides pressure Controlled at 420bar.

The high-pressure variable pump unit (P2) supplies hydraulic oil to store energy in the high-pressure accumulator (HD1) through the HD1 energy storage valve (V4). The energy storage pressure is controlled by the HD1 pressure control sensor (R2), and the energy storage safety pressure value is determined by HD1. Controlled by the pressure safety control valve (V15), when the energy stored in the high-pressure accumulator (HD1) reaches the set value, the HD1 pressure control sensor (R2) sends a signal to stop the energy storage, at this time the oil supplied by the low-pressure pump group (P1) The oil returns to the oil tank through the diverter valve (V1) to cool the oil.

(2) The first slow motion of the injection cylinder (Q): oil is supplied from the oil supply port at the P end of the system, the hammer front valve (V9) works and the stepped pressure relief valve (V8) works, and the oil supply speed is determined by the front chamber section The flow valve (V11) is controlled in real time, and the other oil valves do not work, and the oil supply speed should not be too fast to prevent aluminum liquid from splashing and entraining gas.

(3) The second slow motion of the injection cylinder (Q): oil is supplied from the oil supply port at the P end of the system, the hammer front valve (V9) works and the stepped pressure relief valve (V8) works, and at the same time the fast accumulator (HD2 ) oil supply, fast valve (V13) and front chamber throttle valve (V11) work, the oil supply speed is controlled by the front chamber throttle valve (V11) in real time, the oil supply speed is adjusted according to the product process, the front chamber safety valve (V12) When throttling the front cavity, it plays the role of back pressure protection, and the rest of the oil valves do not work;

(4) High-speed action of the injection cylinder (Q): oil is supplied from the oil supply port at the P end of the system, the hammer front valve (V9) works and the stepped pressure relief valve (V8) works, and the fast accumulator (HD2) supplies oil at the same time. The fast valve (V13) and the front chamber throttle valve (V11) work, the oil supply speed is controlled by the front chamber throttle valve (V11) in real time, the oil supply speed is adjusted according to the product process, the front chamber safety valve (V12) controls the front chamber section It plays the role of back pressure protection during flow, and the remaining oil valves do not work; the difference from step (3): at this time, the oil supply speed of the high-speed action of the injection cylinder (Q) is higher than that of the second slow speed of the injection cylinder (Q) The oil supply speed of the action.

(5) Boosting action: through the position detection of the injection piston rod and the pressure detector (R4) of the rodless chamber of the injection cylinder, the oil pressure of the rodless chamber of the injection cylinder is detected. When the set value is reached, the high pressure accumulator Oil supply to the energy device (HD1), the booster proportional valve (V7) and the stepped pressure relief valve (V8) work, the oil supply speed is adjusted according to the production process, and at the same time, the front cavity throttle valve (V11) is fully opened, at this time the hammer front valve (V9) and quick valve (V13) can be closed or not, and the rest of the oil valves do not work; this saves the time required to close all related oil valves, and also saves the time for traditional die-casting machine pressurization start control, reducing The response time of the booster pilot valve and the booster cartridge valve are shortened, the response time of the booster piston and the closing response time of the high and low pressure isolation valve are omitted, and the time for the booster pressure to be established is greatly improved.

(6) Follow-up action: oil is supplied by the fast accumulator (HD2), the fast valve (V13) and the stepped pressure relief valve (V8) work, and the front chamber throttle valve (V11) works at the same time, the oil supply speed of the follow-up control, and the remaining oil valves do not work;

(7) Hammer return action: Oil is supplied from the oil supply port at the P end of the system, the valve after the hammer (V10) works, the rest of the oil valves are in the normal position, the plunger starts to retreat, and when the return detection signal is issued, the hammer returns The action stops, and one injection cycle action is completed.

The speed control of this method is the throttling control of the front cavity. This control method has more accurate speed control, and has a brake function, which has better process adjustment for products and better protection for molds.

Compared with the traditional die-casting machine, this method omits the pressure booster cylinder and high and low pressure isolation valves in structure, which makes the system structure simpler and lower failure rate, and can save the related pilot control valve, booster cylinder and high and low pressure isolation valves The response time of the pressurization method can make the injection force rise rapidly and reliably after the rapid injection is completed; in addition, a high-pressure relief valve is added to the rodless chamber of the injection cylinder to eliminate the pressure shock of the oil circuit system and make the piston The lever action is more stable, and the pressure building time is nearly 2 times faster than the traditional pressurization method.

The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements or modifications based on the present invention to solve basically the same technical problems and achieve basically the same technical effects are covered by the protection scope of the present invention.

Claims (10)

1. a kind of no pressurizing cylinder supercharging device, it is characterised in that：Including injection oil cylinder（Q）, hammer before valve（V9）, valve after hammer （V10）, low pressure pump group（P1）, high pressure variable pump group（P2）, HD1 energy storage valves（V4）, high pressure accumulator（HD1）With quick accumulator （HD2）；The injection oil cylinder（Q）Front end be equipped with hammer before valve（V9）, valve before the hammer（V9）It is connected with quick accumulator （HD2）, the injection oil cylinder（Q）Rear end be equipped with hammer after valve（V10）, valve after the hammer（V10）It is connected with the ends P oil-feed port, institute It states the ends P oil-feed port and connects the quick accumulator（HD2）；The low pressure pump group（P1）It is connected with high pressure variable pump group（P2）, institute State high pressure variable pump group（P2）It is connected with HD1 energy storage valves（V4）, the HD1 energy storage valve（V4）It is connected with high pressure accumulator（HD1）.

2. a kind of no pressurizing cylinder supercharging device according to claim 1, it is characterised in that：The low pressure pump group（P1）'s One end is connected with oil filter（F1）, the low pressure pump group（P1）The other end be connected with cooler（C1）, the cooler（C1） It is connected with flow divider（V1）.

3. a kind of no pressurizing cylinder supercharging device according to claim 2, it is characterised in that：The high pressure variable pump group （P2）One end be connected with high-precision oil filter（F2）, the high-precision oil filter（F2）Connect the cooler（C1）, described High pressure variable pump group（P2）The other end be connected with high pressure pump group pressure feedback device（R1）With safe pressure control valve（V2）.

4. a kind of no pressurizing cylinder supercharging device according to claim 1, it is characterised in that：The high pressure variable pump group （P2）It is connected with pressure safety valve（V5）, the pressure safety valve（V5）Connect the injection oil cylinder（Q）Rear end, the pressure Safety valve（V5）Connect shot sleeve rod chamber pressure detector（R5）, the shot sleeve rod chamber pressure detector（R5）It is connected with Ante-chamber throttle valve（V11）With ante-chamber safety valve（V12）.

5. a kind of no pressurizing cylinder supercharging device according to claim 1, it is characterised in that：The high pressure accumulator （HD1）It is connected with the safe fuel outlet valves of HD1（V6）With supercharging proportioning valve（V7）, the supercharging proportioning valve（V7）It is connected with classification pressure release Valve（V8）, the classification relief valve（V8）It is connected to the injection oil cylinder（Q）Front end.

6. a kind of no pressurizing cylinder supercharging device according to claim 5, it is characterised in that：The high pressure accumulator （HD1）It is connected with HD1 pressure control sensors（R2）With HD1 pressure security control valves（V15）.

7. a kind of no pressurizing cylinder supercharging device according to claim 1, it is characterised in that：The quick accumulator （HD2）It is connected with HD2 energy storage valves（V14）, the HD2 energy storage valve（V14）It is connected with the preceding valve of hammer（V9）.

8. a kind of no pressurizing cylinder supercharging device according to claim 7, it is characterised in that：The quick accumulator （HD2）It is connected with HD2 pressure control sensors（R3）With HD2 pressure security control valves（V16）.

9. a kind of no pressurizing cylinder supercharging device according to claim 7, it is characterised in that：The quick accumulator （HD2）It is connected with quick valve（V13）, the quick valve（V13）It is connected with shot sleeve rodless cavity pressure detector（R4）, the pressure Penetrate cylinder rodless cavity pressure detector（R4）It is connected to the injection oil cylinder（Q）Front end.

10. it is a kind of as described in claim 1-9 any one without pressurizing cylinder supercharging device without pressurizing cylinder boosting method, It is characterized in that including the following steps：（1）The preliminary preparation of injection partial act：Determine high pressure accumulator（HD1）With it is quick Accumulator（HD2）Pressure whether have reached setting value；Low pressure pump group simultaneously（P1）Work, hydraulic oil pass through oil filter（F1）Slightly Pass through cooler after filtering（C1）Cooling, a portion fluid passes through flow divider（V1）Return to low pressure pump group（P1）Fuel tank, Another part fluid passes through high-precision oil filter（F2）Feed to high pressure variable pump group（P2）；High pressure variable pump group（P2）Confess hydraulic pressure Oil is through HD1 energy storage valves（V4）To high pressure accumulator（HD1）Carry out energy storage；（2）Injection oil cylinder（Q）First segment acts at a slow speed：By being The ends system P oil-feed port fuel feeding, valve before hammering into shape（V9）Work and classification relief valve（V8）Work, delivery rate is by ante-chamber throttle valve（V11） Real-time control, remaining fuel tap do not work；（3）Injection oil cylinder（Q）Second segment acts at a slow speed：By the ends system P oil-feed port fuel feeding, hammer Preceding valve（V9）Work and classification relief valve（V8）Work, while quick accumulator（HD2）Fuel feeding, quick valve（V13）With ante-chamber section Flow valve（V11）Work, delivery rate is by ante-chamber throttle valve（V11）Real-time control, delivery rate are adjusted according to Product Process, remaining Fuel tap does not work；（4）Injection oil cylinder（Q）High speed motion：By the ends system P oil-feed port fuel feeding, valve before hammering into shape（V9）Work and classification are let out Pressure valve（V8）Work, while quick accumulator（HD2）Fuel feeding, quick valve（V13）With ante-chamber throttle valve（V11）Work, fuel feeding speed Degree is by ante-chamber throttle valve（V11）Real-time control, delivery rate are adjusted according to Product Process, remaining fuel tap does not work；（5）Supercharging Action：Pass through the position detection and shot sleeve rodless cavity pressure detector to shot piston（R4）To injection oil cylinder rodless cavity Oil pressure detection, when reaching setting value, high pressure accumulator（HD1）Fuel feeding is pressurized proportioning valve（V7）With classification relief valve（V8） Work adjusts delivery rate, while ante-chamber throttle valve by production technology（V11）Standard-sized sheet, remaining fuel tap do not work；（6）With setting out Make：By quick accumulator（HD2）Fuel feeding, quick valve（V13）With classification relief valve（V8）Work, while ante-chamber throttle valve（V11） Work, to being controlled with going out delivery rate, remaining fuel tap does not work；（7）Return hammer action：By the ends system P oil-feed port fuel feeding, Valve after hammer（V10）Work, remaining fuel tap are in the normal state position, and injection rod starts back to retract, when return detection sends out signal, It returns hammer action to stop, an injection circulation action is completed.