阅读说明：本技术 一种静压造型线排气冒口自动吹扫机电控系统 (Electric control system of static pressure molding line exhaust riser automatic purging machine ) 是由 徐治新 王新星 宋一萍 段素红 何帅伟 李晓燕 何新田 周健 贾春丽 刘强 于 2019-10-09 设计创作，主要内容包括：本发明涉及一种静压造型线排气冒口自动吹扫机电控系统,其中自动吹扫机包括基板组件、升降组件和吹气组件,所述基板组件包括机架和格子网架,所述升降组件设在基板组件的机架上,通过液压控制油缸升降带动吹气组件升降；所述吹气组件包括吹气包、吹风管和阀门；吹气包固定在油缸连接座下方,所述电控系统通过PLC实现自动控制,主要由电磁感应式接近开关、电磁阀、PLC、手动操作界面及电气线路组成,电控系统通过PLC接收各接近开关的信号并控制各电磁阀的开闭使升降组件或吹气组件进行相应动作实现对砂箱排气冒口的自动吹扫,本发明能够实现吹扫工艺的智能化、自动化,降低成本,提高效率,提升砂型良品率。(The invention relates to an electric control system of an automatic purging machine for an exhaust riser of a static pressure molding line, wherein the automatic purging machine comprises a substrate assembly, a lifting assembly and a blowing assembly, the substrate assembly comprises a rack and a grid net rack, the lifting assembly is arranged on the rack of the substrate assembly, and the blowing assembly is driven to lift through the lifting of a hydraulic control oil cylinder; the blowing assembly comprises a blowing bag, a blowing pipe and a valve; the blowing bag is fixed below the oil cylinder connecting seat, the electric control system realizes automatic control through the PLC and mainly comprises electromagnetic induction type proximity switches, electromagnetic valves, the PLC, a manual operation interface and an electric circuit, and the electric control system receives signals of the proximity switches through the PLC and controls the opening and closing of the electromagnetic valves to enable the lifting assembly or the blowing assembly to perform corresponding actions to realize automatic blowing of the exhaust riser of the sand box.)

1. The utility model provides an automatic electromechanical system that sweeps of static pressure molding line exhaust riser, automatic sweep the machine and locate static pressure molding line on, including base plate subassembly, lifting unit and the subassembly of blowing, its characterized in that: the base plate assembly comprises a rack and a grid net rack, the lifting assembly is arranged on the rack of the base plate assembly and comprises an oil cylinder and an oil cylinder connecting seat, the oil cylinder is connected with a hydraulic pipeline, and the air blowing assembly is driven to lift through the lifting of the hydraulic control oil cylinder; the blowing assembly comprises a blowing bag, a blowing pipe and a valve; the blowing bag is fixed below the oil cylinder connecting seat, the side opening of the blowing bag is connected with a pneumatic air-compressing pipeline through a hose, the bottom of the blowing bag is provided with a wire hole and is connected with a valve and a blowing pipe through a pipe joint, the grid net frame is fixed on the blowing bag, the grid net is fixed at the bottom of the grid net frame, and the lower part of the blowing pipe is fixed in the grid of the grid net;

the electric control system realizes automatic control through a PLC and mainly comprises an electromagnetic induction type proximity switch, an electromagnetic valve, the PLC, a manual operation interface and an electric circuit; the electromagnetic induction type proximity switch includes: the ascending and in-place detection switch, the descending and in-place detection switch and the sand box characteristic detection switch are respectively connected with the PLC digital quantity input module through an electric circuit; the electromagnetic valve comprises a purge air valve, an oil cylinder ascending control valve and an oil cylinder descending control valve; the PLC digital quantity output modules are respectively connected through electric circuits;

the sand box characteristic detection switch is arranged below the sand box transfer trolley, the ascending in-place detection switch and the descending in-place detection switch are arranged on the rack according to the ascending and descending vertical positions of the oil cylinder, the purging gas valve is arranged in a gas path of the purging device, and the oil cylinder ascending control valve and the oil cylinder descending control valve are arranged in a hydraulic pipeline; the electric control system receives signals of the proximity switches through the PLC and controls the opening and closing of the electromagnetic valves to enable the lifting assembly or the blowing assembly to perform corresponding actions so as to automatically purge the exhaust riser of the sand box.

2. The automatic purging machine electric control system for the air exhaust risers of the static molding line, according to claim 1, is characterized in that: the required pressure oil of hydro-cylinder comes from hydrostatic line pump station auxiliary engine system, connects on the hydraulic valve plate of automatic blower through hydraulic stop valve, the hydraulic valve plate is equipped with the solenoid valve: the oil cylinder ascending control valve, the oil cylinder descending control valve, the hydraulic lock and the one-way throttle valve are used for controlling the action of the oil cylinder; the oil cylinder lifting control valve attracts the oil cylinder to lift, and the oil cylinder descending control valve attracts the oil cylinder to descend.

3. The automatic purging machine electric control system for the air exhaust risers of the static molding line, according to claim 1, is characterized in that: compressed air required by the air blowing bag comes from the air bag, compressed air of the air bag comes from the static pressure compressed air pipeline, a blowing air valve is arranged between the air blowing bag and the air bag, the blowing air valve is actuated to suck air for blowing, and the blowing air valve is switched off to stop blowing.

4. The automatic purging machine electric control system for the air exhaust risers of the static molding line, according to claim 1, is characterized in that: the manual operation interface is provided with a blowing assembly ascending key, a blowing assembly descending key and a blowing air valve key, and can be controlled in a manual operation assisting mode, wherein the blowing air valve is opened when the blowing air valve key is pressed down, and the blowing air valve is closed when the blowing air valve key is loosened.

5. The automatic purging machine electric control system for the air exhaust risers of the static molding line, according to claim 1, is characterized in that: the lifting assembly further comprises a fixed plate and a movable plate, the fixed plate is welded on the rack, the bottom end of the oil cylinder is fixed on the movable plate through an oil cylinder connecting seat, the blowing bag is fixed below the oil cylinder connecting seat through the movable plate, and a guide mechanism is further arranged between the fixed plate and the movable plate to guide the lifting of the oil cylinder.

6. The automatic purging machine electric control system for the air exhaust risers of the static molding line as claimed in claim 5, wherein: the guide mechanism comprises a guide rod and a guide sleeve, the guide sleeve is fixed on a fixed plate of the rack through a bolt, the guide rod moves up and down in the guide sleeve, the guide rod is connected with a movable plate through a bolt, and a sealing cavity is formed between the guide rod and the guide sleeve through a guide belt, a groove ring and a dustproof ring.

7. The automatic purging machine electric control system for the air exhaust risers of the static molding line, according to claim 1, is characterized in that: the check net rack is composed of angle steel and two steel plates and is fixed on the air blowing bag, wherein the steel plates are used for preventing sand from splashing to the adjacent sand boxes.

Technical Field

The invention relates to the field of static pressure molding, in particular to an electric control system of an automatic purging machine for an exhaust riser of a static pressure molding line.

Background

Casting company green sand static pressure line, the molding of single host computer, the operation beat is 55 casees/hour, and the main product is: the cylinder head comprises a Richardson four-cylinder body, a 4NC four-cylinder body, a 4M5L four-cylinder body, a firewood feeding four-cylinder body, various cylinder head castings and the like. The static pressure line is compacted and molded, so that the whole sand mold is poor in air permeability, a plurality of exhaust risers are designed in the process for exhausting, and feeding is performed after the casting is cooled. Because the number of casting exhaust risers is large, the maximum number of casting molds reaches 40 exhaust risers, a sand mold is usually drilled with 2 servo air drilling hole machines and drilled through the exhaust risers to achieve the exhaust effect, however, after the exhaust risers are drilled through, a large amount of floating sand remains on the wall of the exhaust risers, after the mold is closed, the floating sand falls into a cavity, casting product defects are caused after casting, and the influence on the product quality is great.

The method is characterized in that the waste products and defective products of the static pressure line are analyzed, the reasons for causing the waste products and the defective products are found out, and the defective products are found to be rough in surface finish of the casting and a small amount of broken sand holes due to floating sand reserved in an exhaust riser after the drilling machine drills holes.

In order to blow off floating sand on the wall of the exhaust riser and reduce the influence of the floating sand on the product quality, 2 production workers blow air to each exhaust riser one by using air blowing guns before box closing in the prior art. However, the manual purging of the dead head has the following problems: 1. the manual blowing is that air is blown from the cavity to the outside of the vent hole before the box is turned over in the upper box, and because the diameter of the vent pin of the template is smaller than that of a drill bit of the drilling machine, the aperture difference exists between the joint surface of the vent pin and the drill hole, floating sand exists at the joint surface, and the air cannot be discharged completely by using the blowing mode; 2. because the lower core section is formed by continuously arranging the upper box and the lower box, floating sand is easy to splash by manual blowing and falls into the adjacent lower box; 3 because the gas pocket is more (about 40), and it is very fast to add the operation beat again, often causes the hourglass to blow the condition, and the long-time repetitive mechanical labor of operation workman, personnel are tired very easily, and the effect of blowing is unstable.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide an electric control system of a static pressure molding line exhaust riser automatic purging machine, which realizes automatic purging of a riser of a sand box through automatic control, realizes intellectualization and automation of a purging process, reduces the cost, improves the efficiency and improves the yield of sand molds.

In order to achieve the purpose, the invention adopts the technical scheme that: an automatic purging machine electrical control system for an exhaust riser of a static pressure molding line is arranged on the static pressure molding line and comprises a substrate assembly, a lifting assembly and a blowing assembly, wherein the substrate assembly comprises a rack and a grid net rack; the blowing assembly comprises a blowing bag, a blowing pipe and a valve; the blowing bag is fixed below the oil cylinder connecting seat, the side opening of the blowing bag is connected with a pneumatic air-compressing pipeline through a hose, the bottom of the blowing bag is provided with a wire hole and is connected with a valve and a blowing pipe through a pipe joint, the grid net frame is fixed on the blowing bag, the grid net is fixed at the bottom of the grid net frame, and the lower part of the blowing pipe is fixed in the grid of the grid net; the electric control system realizes automatic control through a PLC and mainly comprises an electromagnetic induction type proximity switch, an electromagnetic valve, the PLC, a manual operation interface and an electric circuit; the electromagnetic induction type proximity switch includes: the ascending and in-place detection switch, the descending and in-place detection switch and the sand box characteristic detection switch are respectively connected with the PLC digital quantity input module through an electric circuit; the electromagnetic valve comprises a purge air valve, an oil cylinder ascending control valve and an oil cylinder descending control valve; the PLC digital quantity output modules are respectively connected through electric circuits; the sand box characteristic detection switch is arranged below the sand box transfer trolley, the ascending in-place detection switch and the descending in-place detection switch are arranged on the rack according to the ascending and descending vertical positions of the oil cylinder, the purging gas valve is arranged in a gas path of the purging device, and the oil cylinder ascending control valve and the oil cylinder descending control valve are arranged in a hydraulic pipeline; the electric control system receives signals of the proximity switches through the PLC and controls the opening and closing of the electromagnetic valves to enable the lifting assembly or the blowing assembly to perform corresponding actions so as to automatically purge the exhaust riser of the sand box.

Further, pressure oil required by the oil cylinder comes from a secondary engine system of the hydrostatic line pump station and is connected to a hydraulic valve plate of the automatic purging machine through a hydraulic stop valve, and the hydraulic valve plate is provided with an electromagnetic valve: the oil cylinder ascending control valve, the oil cylinder descending control valve, the hydraulic lock and the one-way throttle valve are used for controlling the action of the oil cylinder; the oil cylinder lifting control valve attracts the oil cylinder to lift, and the oil cylinder descending control valve attracts the oil cylinder to descend.

Furthermore, compressed air required by the air blowing bag comes from the air bag, compressed air of the air bag comes from the static pressure compressed air pipeline, a blowing air valve is arranged between the air blowing bag and the air bag, the blowing air valve is attracted and ventilated for blowing, and the blowing air valve is powered off to stop blowing.

Furthermore, be equipped with on the manual operation interface and blow subassembly and rise button, blow subassembly decline button and purge valve button, can control through manual operation is supplementary, wherein the purge valve is opened when blowing the pneumatic valve button and pressing, and the purge valve is closed when unclamping.

Further, the lifting assembly further comprises a fixed plate and a movable plate, the fixed plate is welded on the rack, the bottom end of the oil cylinder is fixed on the movable plate through an oil cylinder connecting seat, the blowing bag is fixed below the oil cylinder connecting seat through the movable plate, and a guide mechanism is further arranged between the fixed plate and the movable plate to guide the lifting of the oil cylinder.

Furthermore, the guide mechanism comprises a guide rod and a guide sleeve, the guide sleeve is fixed on a fixed plate of the rack through a bolt, the guide rod moves up and down in the guide sleeve, the guide rod is connected with the movable plate through a bolt, and a sealing cavity is formed between the guide rod and the guide sleeve through a guide belt, a groove ring and a dust ring.

Furthermore, the grid net rack is composed of angle steel and two steel plates and is fixed on the air blowing bag, wherein the steel plates are used for preventing sand from splashing to the adjacent sand boxes.

Has the advantages that: according to the blowing process characteristics of the static pressure molding line, the automatic blowing machine and the electric control system thereof are designed, the automatic blowing function is realized through the matching of the electric control system and the blowing structure, the characteristics of the sand box can be automatically identified, the lifting assembly is automatically controlled, whether lifting is in place or not is automatically detected, the opening and closing of the air valve is automatically controlled, the intellectualization and automation of the blowing process are realized, the defects of blowing leakage, blowing incompleteness, floating sand splashing and the like of manual blowing are effectively overcome, and the blowing efficiency and the blowing quality are improved.

Drawings

FIG. 1 is a front view of the automatic purge machine of the present invention;

FIG. 2 is a left side view of the automatic purge machine of the present invention

FIG. 3 is a top view of the automatic purge machine of the present invention

FIG. 4 is an electrical schematic diagram of an electrical system of the automatic purge machine of the present invention;

FIG. 5 is a pneumatic control schematic diagram of a blowing assembly of the automatic purging machine of the present invention;

FIG. 6 is a hydraulic control schematic diagram of the lifting assembly of the automatic purge machine of the present invention;

FIG. 7 is a schematic view of the installation of the lift-in-place detection switch of the automatic purge machine of the present invention;

FIG. 8 is a schematic view of the installation of a sand box characteristic detection switch of the automatic purging machine of the present invention;

FIG. 9 is a schematic view of a manual operation panel of the automatic purging device of the present invention.

Reference numerals: 1. a frame; 2. an oil cylinder; 3. a fixing plate; 4. An oil cylinder connecting seat; 5. a movable plate; 6. an air blowing bag; 7. a grid frame; 8. a manual ball valve; 9. a blowpipe; 10. a grid network; 11. a guide bar; 12. a guide sleeve; 13. A guide belt; 14. a groove ring; 15. a dust ring; 16. a pipe joint; 17. air bags; 18. hydraulic locking; 19. a one-way throttle valve; 20. a sand box transfer trolley; 21. a lower mold sand box; 22. molding a sand box; b1, rising position detection switch; b2, descending position detection switch; b3, a sand box characteristic detection switch; k1, purge gas valve; k2, cylinder lift control valve; k3, a cylinder descending control valve; f1, a blowing component lifting button; f3, a purge component descending button; f2, and opening a button of the purge gas valve.

Detailed Description

The invention is described in further detail below with reference to the figures and specific examples.

The automatic control system is used for automatically controlling the exhaust riser head blowing machine of the static pressure molding line, the structure of the automatic blowing machine is shown in figures 1-3, the automatic blowing machine is arranged on the static pressure molding line and comprises a substrate assembly, a lifting assembly and a blowing assembly, the substrate assembly comprises a rack 1 and a grid net rack 7, the lifting assembly is arranged on the rack 1 of the substrate assembly and comprises an oil cylinder 2 and an oil cylinder connecting seat 4, the oil cylinder 2 is connected with a hydraulic pipeline, and the blowing assembly is driven to lift by lifting of the hydraulic control oil cylinder 2; the blowing assembly comprises a blowing bag 6, a blowing pipe 9 and a valve; the blowing package 6 is fixed in hydro-cylinder connecting seat 4 below, the trompil of blowing package 6 side links to each other through hose and pneumatic pressure air pipe way, and the bottom of blowing package 6 is opened wired the hole, connects valve and blowing pipe 9 through coupling 16, check net rack 7 is fixed on blowing package 6, and check net 10 is fixed in check net rack 7 bottom, and the lower part of blowing pipe 9 is fixed in the net of check net rack 10.

The lifting assembly of the automatic blowing machine further comprises a fixed plate 3 and a movable plate 5, the fixed plate 3 is welded on the rack 1, the bottom end of the oil cylinder 2 is fixed on the movable plate 5 through an oil cylinder connecting seat 4, the blowing bag 6 is fixed below the oil cylinder 2 connecting seat through the movable plate 5, and a guide mechanism is further arranged between the fixed plate 3 and the movable plate 5 to guide the lifting of the oil cylinder 2; the guide mechanism comprises a guide rod 11 and a guide sleeve 12, the guide sleeve 12 is fixed on the fixed plate 3 of the rack 1 through a bolt, the guide rod 11 moves up and down in the guide sleeve 12, the guide rod 11 is connected with the movable plate 5 through a bolt, and a sealed cavity is formed between the guide rod 11 and the guide sleeve 12 through a guide belt 13, a groove ring 14 and a dust ring 15.

The grid net rack 7 is composed of angle steel and two steel plates and is fixed on the air blowing bag 6, wherein the steel plates are used for preventing sand from splashing to the adjacent sand boxes.

The lattice net 10 is fixed at the bottom of the lattice net rack 7 and used for positioning the blowing pipe and the same sand mould riser, so that the position of the blowing pipe can be conveniently adjusted according to different sand mould risers, and the universal bamboo joint metal pipe of the blowing pipe can be used for randomly adjusting the using length, the angle and the blowing amount; the valve is a manual ball valve 8, a switch can be selected according to the number of dead heads, and a blowing nozzle at the lower end of the blowing pipe 9 is inserted into the grid of the grid net 10, so that the situation that the position of the blowing pipe is easily changed by the reaction force of compressed air after the blowing valve is opened is prevented.

The automatic purging machine realizes automatic control through a PLC, and an electric control system mainly comprises an electromagnetic induction type proximity switch, an electromagnetic valve, the PLC, a human-computer interface and an electric circuit; as shown in fig. 4, the electromagnetic induction type proximity switch includes: the ascending in-place detection switch B1, the descending in-place detection switch B2 and the sand box characteristic detection switch B3 are respectively connected with the PLC digital quantity input module through electric circuits; the electromagnetic valve comprises a purge air valve K1, an oil cylinder ascending control valve K2 and an oil cylinder descending control valve K3 which are respectively connected with the PLC digital quantity output module through electric circuits.

A rising-in-place detection switch B1 and a falling-in-place detection switch B2 are arranged on the frame 1 according to the rising and falling vertical positions of the oil cylinder 2, a sand box characteristic detection switch B3 is arranged below the sand box transfer trolley 20, a blowing air valve K1 is arranged in an air path of a blowing device, and an oil cylinder rising control valve K2 and an oil cylinder falling control valve K3 are arranged in a hydraulic pipeline; the electric control system receives signals of the proximity switches through the PLC and controls the opening and closing of the electromagnetic valves to enable the lifting assembly or the blowing assembly to perform corresponding actions so as to automatically purge the exhaust riser of the sand box.

The pneumatic control principle of the air blowing assembly is shown in fig. 5, compressed air required by the air blowing bag 6 comes from the air bag 17, compressed air of the air bag 17 comes from a static pressure pneumatic pipeline, a blowing and sweeping air valve K1 is arranged between the air blowing bag 6 and the air bag 17, the blowing and sweeping air valve K1 is used for sucking and ventilating air to blow air, and the blowing and sweeping air valve K1 is powered off to stop blowing air.

The hydraulic control principle of the lifting assembly is shown in fig. 6, pressure oil required by the oil cylinder 2 comes from a secondary engine system of a static pressure line pump station and is connected to a hydraulic valve plate of an automatic purging machine through a hydraulic stop valve, and the hydraulic valve plate is provided with an electromagnetic valve: the oil cylinder ascending control valve K2, the oil cylinder descending control valve K3, the hydraulic lock 18 and the one-way throttle valve 19 are used for controlling the action of the oil cylinder 2; the cylinder lifting control valve K2 pulls the cylinder 2 to lift, and the cylinder descending control valve K3 pulls the cylinder 2 to descend.

The installation schematic diagrams of the ascending detection switch B1 and the descending detection switch B2 are shown in FIG. 7, a metal clamping groove with the length of about 1 meter is vertically welded above the rack 1 and used for fixing the detection switches B1 and B2, the vertical positions of the detection switches B1 and B2 are determined according to the ascending and descending positions of the oil cylinder 2, and the detection switches B1 and B2 are respectively fixed on the metal clamping groove.

The sand box characteristic detection switch B3 is arranged below the sand box transfer trolley 20, as shown in FIG. 8, in a row of sand boxes of the static pressure molding line, an upper mold sand box 22 and a lower mold sand box 21 are arranged in sequence, and the upper mold sand box 22 is provided with an exhaust riser and needs to be purged; the lower mold sand box 21 has no exhaust riser and does not need to be purged, so that the purging device is kept still when the sand box is a lower mold.

The invention is also provided with a manual operation panel, as shown in fig. 9, the manual operation panel is provided with an air blowing assembly ascending key F1, an air blowing assembly descending key F3 and an air blowing valve key F2, and can be controlled by manual operation assistance, when in manual operation, the key F2 is pressed to open the air blowing valve K1, and the key F2 is released to close the air blowing valve K1; when the button F1 is pressed, the lifting valve K2 of the purging device is opened, the purging device starts to lift, and the purging device stops after contacting the detection switch B1. When the button F3 is pressed, the descending valve K3 of the purging device is opened and starts to descend, and the purging device stops after contacting the detection switch B2.

Before the automatic purging machine is used, mechanical parts of the automatic purging machine are installed, then detection switches B1, B2 and B3 are installed in place respectively, electromagnetic valves K1, K2 and K3 are installed in corresponding gas circuits or hydraulic pipelines, line connection is carried out according to a schematic diagram shown in figure 4, a manual operation panel is manufactured, a control program is compiled and downloaded into a PLC, the automatic purging machine uses a Siemens 300PLC, and an SFM3010-CHG type proximity switch is selected as the proximity switch.

When automatic purging is carried out, the sand box is transferred to a station of the purging device through the sand box transfer trolley 20, the sand box characteristic detection switch B3 detects the characteristics of the sand box, and when a signal is sent by the B3, the current sand box is a lower mold sand box; the switch B3 has no signal, which indicates that the sand box is an cope flask, and the PLC judges that the sand box is the cope flask or the drag flask according to the signal of the sand box characteristic detection switch B3; if for cope flask: an oil cylinder descending electromagnetic valve K3 is opened, the air blowing assembly descends, a descending position detection switch B2 detects that the air blowing assembly descends to a position, a blowing air valve K1 is opened and timing is carried out, and after the set time is reached, a blowing air valve K1 is closed; an oil cylinder lifting control valve K2 is opened, and the blowing component is detected to be lifted in place through a lifting in-place detection switch B1, so that the blowing is completed; if the sand box is a lower mold sand box, the air blowing assembly is kept still; the process is repeated to realize the automatic purging of the exhaust riser of the sand box of the static pressure molding line.

According to the invention, through the electrical automatic control of the purging machine, the automatic purging of the sand mould riser is completely realized, the establishment of a special post for manual purging is avoided, the cost is reduced, the purging efficiency is improved, the manual purging needs more than 50 seconds, and the automatic purging machine can be completed within 15 seconds; can automated inspection sand box characteristic, the subassembly action of blowing is controlled and is swept, promotes to sweep the quality greatly reduced defective products proportion.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, but any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention are within the scope of the technical solution of the present invention without departing from the technical solution of the present invention.