An automated precision purging method for a box type part shell

Abstract

The application discloses an automatic blowing method for box part shells, which adopts a precise positioning device arranged at the entrance of a cleaning machine roller way, and comprises a support frame, a precise positioning cylinder on the support frame, a positioning tray connected with the precise positioning cylinder through positioning pins to form a one-side two-pin precise positioning mechanism, an electric roller way above the support frame, a collecting box and a tray rack below the electric roller way, side plastic baffle plates arranged on the two sides of the electric roller way, an inverted U-shaped air tank fixedly installed on the electric roller way through bolts, adjustable angle nozzles corresponding to threaded holes and blind holes in the box part shells arranged on the three sides of the inverted U-shaped air tank, the adjustable angle nozzles connected with compressed air through on-off valves, scrap blocking crystal curtains arranged in front of and behind the inverted U-shaped air tank, side pushing position cylinders arranged on the side of the inverted U-shaped air tank, and light sensing switches, front cylinder stop iron and rear cylinder stop iron further arranged on the electric roller way, so that the automatic precise cleaning function of the product can be realized.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of mechanical processing, and relates to cleaning of multi-surface and multi-hole iron filings after shell processing of box type part, in particular to an automatic and accurate blowing method for the shell of the box type part. BACKGROUND

[0002] The cleanliness of box type part products is an extremely important quality index in the mechanical processing process. The contact between the gearbox, engine and other box type parts needs to be connected by threads, so that the shell of the box type part is designed as a large number of threaded holes and blind holes. Due to the unevenness inside the threaded holes and blind holes, a large amount of residual iron filings exists after tool processing, which cannot be washed away by cutting fluid. The iron filings adhered to the inside of the threaded holes and blind holes cannot be cleaned in time. The existing mechanical processing technology is that after the workpiece processing and cleaning process is completed, the surface of the shell of the processed box type part product is generally cleaned by a cleaning machine through high-pressure cleaning, and then dried. After cleaning, the operator needs to hoist the shell, turn over the shell, and blow the residual filings in each threaded hole and blind hole one by one, which is labor-intensive, low in efficiency, and poor in cleaning effect. There are also safety hazards in the hoisting and blowing process of the shell. This problem has been a difficult and painful point for cleaning the threaded holes and blind holes of the shell of the box type part. SUMMARY

[0003] In view of the defects or deficiencies of the prior art, the purpose of the present application is to provide an automatic and accurate blowing method for the shell of the box type part.

[0004] In order to achieve the above-mentioned task, the present application adopts the following technical solutions:

[0005] An automatic and accurate blowing method for the shell of the box type part, characterized in that a precise positioning device is arranged at the entrance of the cleaning machine roller, the precise positioning device comprises a support frame, a precise positioning cylinder is arranged on the support frame, the precise positioning cylinder is connected with a positioning tray through a positioning pin to form a one-side two-pin precise positioning mechanism; an electric roller is arranged above the support frame, a flow guide box and a filings receiving tray are arranged below the electric roller; side plastic baffle plates are arranged on both sides of the electric roller, a reverse U-shaped air tank is fixedly installed on the electric roller through bolts; adjustable angle nozzles corresponding to the threaded holes and blind holes in the shell of the box type part are arranged on the three sides inside the reverse U-shaped air tank, the adjustable angle nozzles are connected with a compressed air source through on-off valves; a filings blocking crystal curtain is arranged in front of and behind the adjustable angle nozzles; a side pushing position cylinder is arranged on the side of the reverse U-shaped air tank; a light sensing switch, a front cylinder stopper and a rear cylinder stopper are further arranged on the electric roller.

[0006] The automatic blowing method for the shell of the box type part comprises the following steps:

[0007] 1) The box type part shell is placed above the electric roller, and the box type part shell moves along the electric roller to the inverted U-shaped air tank;

[0008] 2) When the box type part shell passes through the light sensor switch, the light sensor switch is automatically closed, and the control circuit is started;

[0009] 3) The front stop iron of the air cylinder and the rear stop iron of the air cylinder are started to lift, the front stop iron of the air cylinder limits the box type part shell behind to enter the cleaning station, and the rear stop iron of the air cylinder blocks the box type part shell turning into the cleaning station, realizing rough positioning of the box type part shell in the roller direction;

[0010] 4) The side push position air cylinder is started to push the box type part shell, so that the box type part shell is guaranteed to abut against the side plastic stop plate in the inner side of the electric roller, and rough positioning of the box type part shell in the vertical roller direction is realized;

[0011] 5) After the side push position air cylinder is started for 3 seconds, on the basis of rough positioning in the roller direction and the vertical roller direction, a one-side two-pin precision positioning mechanism is started to realize precision positioning, and the precision positioning error is not more than 0.02 mm;

[0012] 6) After realizing precision positioning, the on-off valve is connected, compressed air enters the inverted U-shaped air tank, and all adjustable angle nozzles blow the threaded holes of the box type part shell for 5 seconds, so that the threaded holes and blind holes of the box type part shell are blown and cleaned;

[0013] 7) After blowing for 5 seconds, the one-side two-pin precision positioning mechanism falls down and returns to the original position, the box type part shell falls into the electric roller, and automatically moves forward to enter the next process;

[0014] 9) After cleaning the box type part shell, the iron filings fall by gravity, pass through the tapered chute of the flow guide box and fall into the iron chip collection disc for recycling.

[0015] According to the application, the adjustable angle nozzle adopts a 1mm-1.5mm diameter adjustable angle nozzle, the nozzle angle can be adjusted at will, and the compressed air pressure is 0.6MP.

[0016] The automatic precision blowing method of the box type part shell realizes precision positioning and blowing and cleaning of the iron filings in the irregular structures such as threaded holes of the shell type part, the PLC program automatic blowing device action is reliable, and after long-time continuous optimization and improvement verification, the product automatic precision cleaning function can be realized in the product transfer process. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a precision positioning device structure schematic diagram;

[0018] Figure 2 is Figure 1 A schematic diagram of the structure of A in

[0019] Figure 3 is a schematic diagram of an angle-adjustable nozzle structure, where the left drawing is a sectional view and the right drawing is a schematic diagram of working at 45° in any direction;

[0020] Figure 4 is a control circuit diagram;

[0021] Figure 5 is a schematic diagram of an electric roller structure, where the left drawing is a front view and the right drawing is a left view;

[0022] Figure 6 is a schematic diagram of a box-shaped part shell, where the upper drawing is a front view and the lower drawing is a top view;

[0023] Figure 7 is a schematic diagram of front and rear cylinder stoppers, where the upper drawing is a front view, the right drawing is a left view, and the lower drawing is a top view;

[0024] Figure 8 is a schematic diagram of a reverse U-shaped air tank structure with an angle-adjustable nozzle, where the upper drawing is a front view, the right drawing is a left view, and the lower drawing is a top view;

[0025] Figure 9 is a schematic diagram of a support frame, a precision positioning cylinder, a positioning tray, and a positioning pin connection, where the upper drawing is a front view, the right drawing is a left view, and the lower drawing is a top view;

[0026] Figure 10 is a schematic diagram of a one-side two-pin positioning device, where the upper drawing is a front view, the right drawing is a left view, and the lower drawing is a top view;

[0027] Figure 11 is a schematic diagram of a flow guide box structure, where the upper drawing is a front view, the right drawing is a left view, and the lower drawing is a top view;

[0028] Figure 12 is a schematic diagram of a chip receiving disc structure, where the upper drawing is a front view, the right drawing is a left view, and the lower drawing is a top view;

[0029] Figure 13 is a schematic diagram of a side pushing position cylinder structure;

[0030] Figure 14 is a schematic diagram of a positioning pin structure;

[0031] The marks in the figure respectively represent: 1, electric roller, 2, box type part shell, 3, light sensing switch, 4, front cylinder stopper, 5, bolt, 6, inverted U-shaped air tank, 7, rear cylinder stopper, 8, support frame, 9, accurate positioning cylinder, 10, positioning tray, 11, positioning pin, 12, side plastic baffle, 13, side push position cylinder, 14, adjustable angle nozzle, 15, chip blocking crystal curtain, 16, flow guide box, 17, chip receiving plate.

[0032] The application will be further described in detail below in combination with the drawings and examples. DETAILED DESCRIPTION

[0033] The research and development idea of the present application is that according to the working condition at the entrance of the roller of the cleaning machine, before the box type part shell enters the cleaning machine, firstly, it is necessary to automatically clean the threaded hole and blind hole of the box type part shell by program, an accurate positioning device is designed at the front end of the entrance of the cleaning machine, and the residual iron chip defects and deficiencies of the threaded hole are effectively solved. Through the design of the detection elements and the execution of the actions of various air valves and cylinder actions of the PLC circuit, the shell passes through the roller, and the shell passes through four steps of automatic coarse positioning, automatic accurate positioning, automatic blowing of the workpiece, and positioning lifting and falling, the accurate blowing of the program automatic control method is realized, and the accurate positioning and cleaning function of the threaded hole of the box type shell is achieved.

[0034] Referring to Figures 1-2 The present embodiment provides an automatic accurate blowing method for box type part shell, which adopts an accurate positioning device arranged at the entrance of the roller of the cleaning machine, the accurate positioning device comprises a support frame 8, an accurate positioning cylinder 9 is arranged on the support frame 8, the accurate positioning cylinder 9 is connected with a positioning tray 10 through a positioning pin 11 to form a one-side two-pin accurate positioning mechanism; an electric roller 1 is arranged above the support frame 8, a flow guide box 16 and a chip receiving plate 17 are arranged below the electric roller 1; side plastic baffles 12 are arranged on both sides of the electric roller 1, an inverted U-shaped air tank 6 is fixedly installed on the electric roller 1 through bolts 5; adjustable angle nozzles 14 corresponding to the threaded holes and blind holes in the box type part shell are arranged on the three sides inside the inverted U-shaped air tank 6, the adjustable angle nozzles 14 are connected with a compressed air source through on-off valves; a chip blocking crystal curtain 15 is arranged in front of the adjustable angle nozzles 14; a side push position cylinder 13 is arranged on the side of the inverted U-shaped air tank 6; a light sensing switch 3, a front cylinder stopper 4 and a rear cylinder stopper 7 are further arranged on the electric roller 1.

[0035] The automatic blowing method for the box type part shell comprises the following steps:

[0036] 1) The box type part shell 2 is placed above the electric roller 1, and the box type part shell 2 moves in the direction of the inverted U-shaped air tank 6 along the electric roller 1;

[0037] 2) When the box part shell 2 passes through the light sensor switch 3, the light sensor switch 3 is automatically closed to start the control circuit;

[0038] 3) The front cylinder stop 4 and the rear cylinder stop 7 are started to lift up, the front cylinder stop 4 limits the box part shell 2 behind to enter the cleaning station, and the rear cylinder stop 7 blocks the box part shell 2 turning into the cleaning station, realizing rough positioning of the box part shell 2 in the roller direction;

[0039] 4) The side push cylinder 13 is started to push the box part shell 2, ensuring that the box part shell 2 is attached to the inner side plastic stop plate 12 of the electric roller 1, realizing rough positioning of the box part shell 2 in the vertical roller direction;

[0040] 5) After the side push cylinder 13 is started for 3 seconds, based on rough positioning in the roller direction and the vertical roller direction, a one-side two-pin precision positioning mechanism is started to realize precision positioning, with a precision positioning error of not more than 0.02 mm;

[0041] 6) After realizing precision positioning, the on-off valve is connected, compressed air enters the inverted U-shaped air tank, and all adjustable angle nozzles 14 blow the corresponding threaded holes and blind holes of the box part shell 2 for 5 seconds, cleaning the inside of the threaded holes and blind holes of the box part shell 2;

[0042] 7) After blowing for 5 seconds, the one-side two-pin precision positioning mechanism falls back to its original position, the box part shell 2 falls into the electric roller 1, the front cylinder stop 4 and the rear cylinder stop 7 fall down, and the box part shell 2 automatically moves forward to enter the next process;

[0043] 8) After cleaning the box part shell 2, the iron filings fall by gravity, pass through the tapered chute of the flow guide box 16, and fall into the iron collecting tray 17 for recycling.

[0044] Among them, the adjustable angle nozzle 14 is used in the precision positioning device to adapt to the compatibility and universality of various types of shell parts. After the iron filings in the threaded holes are blown out by the precision positioning device, the iron filings are blocked from flying out of the inverted U-shaped air tank 6 by the iron filings blocking crystal curtain 15 at the inlet and outlet of the inverted U-shaped air tank 6, and all the iron filings fall by gravity, pass through the tapered chute of the flow guide box 16, and fall into the iron collecting tray 17 for recycling. The iron collecting tray 17 can be extracted and cleaned in time. This ensures that the blowing and cleaning environment is more environmentally friendly. It replaces the previous complicated manual blowing process and achieves the automatic goal of improving quality, increasing efficiency, and reducing cost.

[0045] The electric roller 1 is controlled by the electric PLC, the box type part shell 2 is lifted into the electric roller 1, after the light sensing switch 3 is blocked and the order is sent, the front cylinder stop iron 4 falls down, the box type part shell 2 enters the accurate positioning device, and is stopped by the rear cylinder stop iron 7, after the light sensing switch 3 is blocked and the order is sent, the side push position cylinder 13 pushes the box type part shell 2 to be close to the opposite front cylinder stop iron 4, and then sends the order, the positioning tray 10 is lifted up under the action of the accurate positioning cylinder 9, and supports the box type part shell 2, the two positioning pins 11 are inserted into the positioning holes in the bottom surface of the box type part shell 2 to lift up, all the threaded holes and blind holes in the box type part shell 2 are aligned with the adjustable angle nozzles 14 arranged on the three surfaces of the inverted U-shaped air tank 6, the adjustable angle nozzles 14 and each threaded hole and blind hole on the box type part shell 2 are in one-to-one correspondence, the electric PLC sends the order after 5 seconds of blowing set by the PLC, one-side two-pin accurate positioning mechanism and the rear cylinder stop iron 7 fall down, the box type part shell 2 is separated from the positioning pins 11 and enters the cleaning machine through the electric roller 1, and is further cleaned, dried and treated. Through the accurate positioning device and the cleaning machine, the problem of residual iron filings in the threaded holes and blind holes in the box type part shell is solved.

[0046] In the following description, the structure of the adjustable angle nozzle 14, the electric roller 1, the box type part shell 2, the front cylinder stop iron 4, the rear cylinder stop iron 7, the inverted U-shaped air tank 6, the accurate positioning cylinder 9, the flow guide box 16, the chip receiving disc 17, the side push position cylinder 13, the positioning pin 11 and the like can be seen from Figure 3 , Figures 5-8 , Figures 11-14 , the connection mode of the support frame 8, the accurate positioning cylinder 9, the positioning tray 10 and the positioning pin 11 can be seen from Figure 9 , and the one-side two-pin positioning device can be seen from Figure 10 .

[0047] 1) Accurate positioning:

[0048] The accurate positioning includes two steps of rough positioning and accurate positioning.

[0049] a) Coarse positioning is achieved by rear cylinder stop 7, side push position cylinder 13 and side plastic stop 12. After the box-like part shell 2 blocks the light sensor switch 3 on the electric roller 1, the rear cylinder stop 7 is activated to lift up. After 2 seconds, the box-like part shell 2 automatically passes the front stop 4, the front stop 4 is lifted up, the front stop 4 limits the box-like part shell 2 from entering the cleaning and blowing station, the rear cylinder stop 7 blocks the box-like part shell 2 from turning into the cleaning and blowing station, the box-like part shell 2 stops moving forward, the side push position cylinder 13 is activated to push the box-like part shell 2 to the side plastic stop 12 of the electric roller 1 for coarse positioning. Through the limitation of the box-like part shell 2 by the rear cylinder stop 7 and the pushing of the box-like part shell 2 by the side push position cylinder 13, the coarse positioning of the box-like part shell 2 in the roller direction and the vertical roller direction is formed.

[0050] b) Precise positioning mechanism is achieved by support frame 8, precise positioning cylinder 9, positioning pin 11 and side plastic stop 12. The positioning pin 11 and the positioning tray 10 form a one-side two-pin precise positioning mechanism of the box-like part shell 2. The positioning method is consistent with the one-side two-pin positioning method of the workpiece, and the precise positioning error is not more than 0.02 mm.

[0051] In this embodiment, the top end of the positioning pin 11 adopts an oval structure, so that the positioning pin 11 can be better guided into the positioning hole, and the oval top can avoid the possibility of scratching the positioning surface of the box-like part shell 2. The support frame 8 is used to support the weight of the box-like part shell 2, and the positioning pin 11 and the positioning tray 10 move up and down. After the box-like part shell 2 is coarsely positioned in the roller direction and the vertical roller direction, the precise positioning cylinder 9 of the one-side two-pin precise positioning mechanism is activated to lift up, the positioning pin 11 enters the positioning hole, the surface of the positioning tray 10 is in close contact with the bottom of the box-like part shell 2, the box-like part shell 2 is lifted into the inverted U-shaped air tank 6, all threaded holes and blind holes in the box-like part shell 2 correspond to the positions of the adjustable angle nozzles 14 inside the cavity of the inverted U-shaped air tank 6, and the blowing instruction is set. The adjustable angle nozzles 14 perform 5-second debris removal action.

[0052] 2) Workpiece transfer control:

[0053] The workpiece transfer part is mainly realized by the electric roller 1, the light sensor switch 3, the front cylinder stop 4 and the rear cylinder stop 7.

[0054] a) After the 5-second blowing of the box-like part shell 2 is completed, the precise positioning cylinder 9 is lowered, the box-like part shell 2 is separated from the positioning pin 11 and the positioning tray 10, the rear cylinder stop 7 is lowered, the box-like part shell 2 moves forward along the electric roller 1, enters and passes through the cleaning machine, and is further cleaned comprehensively.

[0055] b) After the end of the process of accurately positioning the cleaning box part shell 2, the front cylinder stop 4 and the rear cylinder stop 7 fall down, and the box part shell 2 continues to enter the next station.

[0056] c) The plastic baffle 12 on the inner side of the electric roller 1 plays a guiding and anti-collision role for the box part shell 2. During the guiding of the box part shell 2 to move forward, the plastic baffle 12 avoids the direct collision between the box part shell 2 and the electric roller 1, and avoids scratching the side machining surface of the box part shell 2.

[0057] 3) Circuit control mode:

[0058] As shown in the control circuit diagram, Figure 4 the box part shell 2 placed on the electric roller 1 automatically moves to the direction of the inverted U-shaped air tank 6, touches the light-sensitive switch 3, the light-sensitive switch 3 is closed, KA0 is attracted, the rear limiting cylinder 7 is started to lift up, the time relay in the PLC is designed to count down for 3 seconds, KA1 is attracted, the front baffle 4 is lifted up, and the side pushing position cylinder 13 is pushed in. The control of the rough positioning process of the box part shell 2 is completed. After the time relay in the PLC is designed to count down for 3 seconds, the one-side two-pin accurate positioning mechanism is lifted up, the accurate positioning is completed, after the accurate positioning cylinder 9 is in place, the detection switch on the accurate positioning cylinder 9 is closed to start blowing, and the blowing lasts for 5 seconds. After the time relay in the PLC is designed to count down for 5 seconds, the blowing action is completed, KA3 is disconnected, the blowing is stopped, KA2 is disconnected, and the one-side two-pin accurate positioning mechanism falls down. The detection switch below the accurate positioning cylinder 9 is closed, KA0 and KA1 are powered off, the rear cylinder stop 7 falls down, the front cylinder stop 4 falls down, the side pushing position cylinder 13 is loosened, and the original state is restored. The box part shell 2 is turned out. The next cycle is entered.

[0059] 4) Design of the inverted U-shaped air tank 6:

[0060] The inverted U-shaped air tank 6 is designed as an inverted “U” structure. When the box part shell 2 passes through the inverted U-shaped air tank 6, the one-side two-pin accurate positioning mechanism corresponds the threaded holes and blind holes of the box part shell 2 to the adjustable angle nozzles 14 one by one, so as to realize accurate blowing. The inverted U-shaped air tank 6 is installed with scrap blocking crystal curtains 15 on both sides, a flow guide box 16 and a scrap receiving disc 17 at the bottom. The tapered chute of the flow guide box 16 ensures that the iron scraps can slide into the scrap receiving disc 17 in time, so that the working environment is more environmentally friendly.

[0061] a) The inverted U-shaped air tank 6 is fastened and connected with the outer edge angle steel on the electric roller 1 through bolts 5. The inverted U-shaped air tank 6 includes three faces. In this embodiment, a total of 55 adjustable angle nozzles 14 are arranged on the three faces of the inverted U-shaped air tank 6. Of course, in actual work, the specific number of the adjustable angle nozzles 14 can be adjusted according to the actual situation of the box part shell 2, so as to adapt to the blowing compatibility of various shell parts.

[0062] b) In this embodiment, the adjustable angle nozzle 14 is a 1mm-1.5mm diameter adjustable angle nozzle 14, which can adjust the angle of the nozzle at will, and the compressed air pressure is about 0.6MP.

[0063] c) Adjustment method of adjustable angle nozzle 14:

[0064] The adjustable angle nozzle 14 is an industrial standard product. It is composed of a stainless steel universal base and various required nozzles. The universal base is composed of a ball socket and a rotating ball head, and the angle of the ball head nozzle is adjusted by tightening or loosening the ball socket external thread and the ball head nut.

[0065] The inverted U-shaped air tank 6 designed in this embodiment is according to the position of all threaded holes and blind holes on the three surfaces of the box-shaped part shell 2 after precise positioning and lifting. When making, holes are drilled on the three surfaces of the inverted U-shaped air tank 6 respectively, and then the adjustable angle nozzle 14 is welded, that is, a one-to-one correspondence between the adjustable angle nozzle 14 and all threaded holes and blind holes of the box-shaped part shell 2 is formed.

[0066] Universal compatibility: when blowing different types of box-shaped part shells, the angle of the adjustable angle nozzle 14 can be adjusted at will according to the position degree change and number of threaded holes and blind holes, and all threaded holes and blind holes on the box-shaped part shell are aligned and the adjustable angle nozzle 14 is determined by tightening the spherical locking nut. The small ball valve on the useless adjustable angle nozzle 14 can also be closed separately to stop blowing.

[0067] d) The bottom guide tank 16 is designed as an open chute empty structure. In the self-designed precise positioning device, the iron filings in the threaded holes are blown out, and the iron filings are blocked from flying out of the inverted U-shaped air tank 6 by the iron filings blocking water crystal curtain 15 at the inlet and outlet of the inverted U-shaped air tank 6. All iron filings fall through the conical chute of the guide tank 16 due to gravity and fall into the iron collecting tray 17, which can be pulled out and cleaned in time. Avoiding iron filings flying and polluting the working environment.

[0068] 5) Automatic blowing process

[0069] Specifically includes the following steps:

[0070] 1) Place the box-shaped part shell 2 above the electric roller 1, and move the box-shaped part shell 2 along the electric roller 1 towards the inverted U-shaped air tank 6;

[0071] 2) When the box-shaped part shell 2 passes through the light-sensitive switch 3, the light-sensitive switch 3 is automatically closed, and the control circuit is started;

[0072] 3) The cylinder front stopper 4 and the cylinder rear stopper 7 are started to lift, the cylinder front stopper 4 limits the rear box type part shell 2 to enter the cleaning station, the cylinder rear stopper 7 blocks the box type part shell 2 turning into the cleaning station, realizing the rough positioning of the box type part shell 2 in the roller direction;

[0073] 4) The side push position cylinder 13 is started to push the box type part shell 2, ensuring that the box type part shell 2 is attached to the side plastic stopper 12 inside the electric roller 1, realizing the rough positioning of the box type part shell 2 in the vertical roller direction;

[0074] 5) After the side push position cylinder 13 is started for 3 seconds, on the basis of the rough positioning in the roller direction and the vertical roller direction, a one-side two-pin precise positioning mechanism is started to realize precise positioning, and the precise positioning error is not more than 0.02mm;

[0075] 6) After realizing precise positioning, the precise positioning cylinder 9 is started to lift, the on-off valve is connected, the compressed air is started to enter the inverted U-shaped air tank 6, and all the adjustable angle nozzles 14 blow for 5 seconds to the relative position of the box type part shell 2, cleaning the inside of the threaded hole and the blind hole of the box type part shell 2;

[0076] 7) After blowing for 5 seconds, the one-side two-pin precise positioning mechanism is lowered to restore the original position, and the box type part shell 2 falls into the electric roller 1 and automatically moves forward to enter the next process;

[0077] 8) After cleaning the box type part shell 2, the iron filings fall by gravity, all the iron filings fall through the conical sliding groove of the flow guide box 16 and fall into the iron collecting disc 17, and the iron collecting disc 17 can be pulled out and cleaned in time.

Claims

1. An automated and precise blowing method for the housing of box-type parts, characterized in that, A precision positioning device is installed at the entrance of the washing machine roller conveyor. The precision positioning device includes a support frame (8), on which a precision positioning cylinder (9) is mounted. The precision positioning cylinder (9) is connected to a positioning tray (10) via positioning pins (11) to form a one-sided two-pin precision positioning mechanism. Above the support frame (8) is an electric roller conveyor (1), and below the electric roller conveyor (11) are a guide box (16) and a chip receiving tray (17). Side plastic baffles (12) are installed on both sides of the electric roller conveyor (1), and bolts are used to connect the electric roller conveyor (1). (5) A U-shaped air box (6) is fixedly installed; on the three sides inside the U-shaped air box (6), there are adjustable angle nozzles (14) corresponding to the threaded holes and blind holes in the housing of the box-type parts. The adjustable angle nozzles (14) are connected to the compressed air source through the on-off valve; there is a chip-blocking crystal curtain (15) in front of the adjustable angle nozzles (14); a side-push cylinder (13) is provided on the side of the U-shaped air box (6); a photosensitive switch (3), a front cylinder stop (4) and a rear cylinder stop (7) are also provided on the electric roller conveyor (1). An automated purging method for the housing of box-type parts includes the following steps: 1) Place the box-type part housing (2) above the electric roller conveyor (1), and the box-type part housing (2) moves automatically along the electric roller conveyor (1) towards the inverted U-shaped air box (6); 2) When the housing (2) of the box-type parts passes through the photosensitive switch (3), the photosensitive switch (3) automatically closes and starts the control circuit; 3) The cylinder front stop (4) and cylinder rear stop (7) are started and lifted. The cylinder front stop (4) restricts the rear box-type part housing (2) from entering the cleaning station. The cylinder rear stop (7) blocks the box-type part housing (2) from entering the cleaning station, thus achieving rough positioning of the box-type part housing (2) in the roller direction. 4) The side-push cylinder (13) is started to push the housing (2) of the box-type parts, ensuring that the other side of the housing (2) is against the side plastic baffle (12) inside the electric roller conveyor (1), so as to achieve coarse positioning of the housing (2) of the box-type parts in the direction of the vertical roller conveyor. 5) After the side push cylinder (13) starts for 3 seconds, on the basis of coarse positioning in the direction of the roller conveyor and the direction perpendicular to the roller conveyor, the one-sided two-pin precision positioning mechanism is started to achieve precise positioning, and the precision positioning error does not exceed 0.02mm; 6) After achieving precise positioning, the precise positioning cylinder (9) starts to lift up, the positioning pin enters the positioning hole, the positioning tray is in close contact with the bottom of the box-type part housing, the box-type part housing is lifted into the inverted U-shaped air box, all the threaded holes and blind holes in the box-type part housing correspond one-to-one with the positions of the adjustable angle nozzles inside the inverted U-shaped air box cavity; all the adjustable angle nozzles (14) blow for 5 seconds to the threaded holes and blind holes of the box-type part housing (2) at the corresponding positions, cleaning the iron filings inside the threaded holes and blind holes of the box-type part housing (2); 7) After 5 seconds of blowing, the one-sided two-pin precision positioning mechanism falls down and returns to its original position. The box-type part housing (2) falls onto the electric roller conveyor (1), the front cylinder stop (4) and the rear cylinder stop (7) fall down, and the box-type part housing (2) automatically moves forward to enter the next process. 8) After cleaning the housing of the box-type parts (2), the iron filings fall off by gravity and fall into the chip receiving tray (17) through the conical chute of the guide box (16) for recycling.

2. The method as described in claim 1, characterized in that, The adjustable angle nozzle (14) is an adjustable angle nozzle with a diameter of 1mm-1.5mm, and the nozzle angle can be adjusted at will. The compressed air pressure is 0.6MP.

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