JP3192551B2 - Device for removing foreign matter remaining inside hollow castings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interior of a hollow casting which is manufactured by a casting manufacturing method and has a complicated hollow portion therein and which can be used for cleaning work, for example, a closed deck cylinder block, an intake manifold, a surge tank and the like. The present invention relates to a device for removing foreign matter remaining in a device.

[0002]

[Prior art]

(1) JP-A-3-234471 discloses that in order to prevent dents, bends, cracks and the like from being generated on the surface of a work, the work is conveyed using a walking beam without using a hanger, and a shot is taken during the conveyance. A shot blast apparatus that performs a blast process is disclosed. (2) JP-A-64-16375 discloses that in order to prevent a cast product from being damaged or deformed,
A casting cleaning apparatus is disclosed which holds a work, gives a rotational movement, and sprays abrasive grains from a nozzle which swings in a direction perpendicular to the rotational direction.

[0003]

In each of the conventional apparatuses disclosed in the above (1) and (2), in order to clean the outer surface of a cast product after casting, abrasives are applied to the outer surface. It sprays. For this reason, each of the conventional devices described above
Its use is limited to cleaning the outer surface of a casting. That is, for example, as a casting to be cleaned,
When using a closed deck cylinder block having a hollow portion of a complicated shape communicating with the opening and the opening,
It is difficult to remove and clean the core sand and the coating agent remaining on the wall surface of the hollow portion after casting by the above-mentioned conventional devices.

Therefore, it is conceivable to insert a nozzle into the hollow portion from the opening of the casting by manual operation and spray abrasive grains ejected from the nozzle onto the wall surface of the hollow portion. If it has a cut portion, it cannot be completely cleaned. The present invention has been made in view of the above problems, and has as its object to provide a removal device capable of removing foreign matter remaining in a casting having an opening and a hollow portion communicating with the opening, that is, a so-called hollow casting. And

[0005]

SUMMARY OF THE INVENTION According to the present invention, there is provided an apparatus for removing foreign matter remaining in a hollow casting, comprising mounting a hollow casting having a hollow portion and a plurality of openings communicating with the hollow portion, and mounting the hollow casting. A vibration applying means for applying vibration to the hollow casting, and a compressed air nozzle portion which is detachably attached to at least one of the openings of the hollow casting placed on the vibration applying means and ejects compressed air to the hollow portion. An air supply means having a nozzle pressing part for pressing and holding the compressed air nozzle part in the opening part, and a filter detachably mounted on the other opening part of the hollow casting placed on the vibration applying means. And a filter means having a filter pressing portion for pressing and holding the filter in the opening.

[0006]

The operation of the thus configured apparatus for removing foreign matter remaining inside the hollow casting of the present invention (hereinafter referred to as the removing apparatus of the present invention) will be described below. First, prior to using the removing apparatus of the present invention, a hollow casting having a hollow portion and a plurality of openings communicating with the hollow portion is prepared in advance as a product to be subjected to residual foreign matter removal.

[0007] The hollow casting is placed on the vibration imparting means of the removing apparatus of the present invention, and a predetermined amount of abrasive grains having a particle size that does not pass through the filter is injected into the hollow from the opening of the hollow casting. Thereafter, the nozzle pressing portion of the air supply means is moved forward (moving forward) to one of the plurality of openings of the hollow casting, and the compressed air nozzle portion is mounted and pressed and held. Next, the filter pressing portion of the filtering means is moved forward (moving forward), and a filter is attached to the other of the plurality of openings of the hollow casting and pressed and held. Then, in addition to the fixing action force by the nozzle pressing portion of the air supply means, the hollow casting has a fixing action force integrally fixed to the vibration applying means by the filter pressing section. Therefore, the hollow casting is securely fixed and held on the mounting portion of the vibration applying means.
Also, the opening of the hollow casting to which the compressed air nozzle portion and the filter are attached is airtight to the outside.

[0008] The hollow casting in the above state is given a vibration of a predetermined magnitude by the vibration giving means. On the other hand, at the same time, compressed air is jetted from the compressed air nozzle portion of the air supply means into the hollow portion of the hollow casting.
Then, the abrasive grains that have been thrown into the hollow portion of the hollow casting are wound up by the compressed air, and jump violently due to the applied vibration, and vibrate and vibrate with the wall surface of the hollow portion of the hollow casting that vibrates. The particles and the residual foreign matter such as the core sand and the coating agent, which have been baked on the wall surface, and the abrasive grains friction with each other, and the abrasive grains collide with the residual foreign matters and are hit hard.

[0009] Thus, the residual foreign matter is peeled and removed from the wall surface, and the peeled coating agent is immediately mixed into the discharge flow of the compressed air to be filtered by the filtering means attached to the opening of the hollow casting. The light passes through the filter and is discharged to the outside. At this time, the abrasive grains and the separated core sand in the hollow portion are prevented from jumping out together with the discharge flow of the compressed air by the filter, and the impact action of the residual foreign matter is repeatedly performed in the hollow portion. . In this way, the hollow casting becomes clean by removing the remaining foreign matter firmly attached to the wall surface of the hollow portion. The mold wash discharged to the outside can be collected by a separate collecting device such as a dust collector.

Thereafter, the application of vibration to the hollow casting by the vibration applying means and the ejection of compressed air by the compressed air nozzle portion of the air supply means are stopped. At the same time, the nozzle pressing portion of the air supply means is reactivated (moved backward) to release the compressed air nozzle portion from being attached to the opening of the hollow casting and pressing and holding. Further, the filter pressing portion of the filtering means is reactivated (removed) to release the filter from being attached to the opening of the hollow casting and to hold the filter.

After the purification of the hollow portion is completed, the hollow casting is taken out from the vibration applying means.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a device for removing foreign matter remaining in a hollow casting (hereinafter referred to as a removing device) according to the present invention will be described as a hollow casting using a closed deck cylinder block (hereinafter referred to as a workpiece) as a component of an automobile engine. This will be described with reference to FIGS.

The removing apparatus 1 of the embodiment shown in FIG. 1 includes a vibration applying means 2, a pair of air supply means 3, and a filtering means 4. The vibration applying means 2 is installed on the upper surface 21 of the flat base 20 and generates a vibration and is disposed at a predetermined interval around the vibrator 22 around the vibrator 22 having the vibration transmitting cam 22a. A plurality of coil-shaped support springs 23 (shown only on the left and right in FIGS. 1 and 2) having sufficient strength, a mounting surface 24a on which the work 5 is mounted, and a lower surface 24b Is the support spring 23
The rigid plate is placed and held substantially horizontally on the upper end of the plate, and abutted against the vibration transmission cam 22a of the vibrator 22, and is provided so as to receive vibration from the vibrator 22 and has a rigid plate-like shape. Table 24.

The table 24 is three-dimensionally moved (up and down, left and right, back and forth) by the action of each support spring 23 when vibration is applied from the vibrator 22 during operation.
It is elastically supported to be able to swing. The vibration frequency of the mounting table 24 during the operation of the vibrator 22 is 20 to 200H.
Z and the amplitude are set in the range of 2 to 40 mm. The conditions such as the frequency and the amplitude are not limited to the numerical values, but can be variously set.

As will be described later, the pair of air supply means 3 is used at a target position opposed to both sides 5a of the work 5 placed on the placement surface 24a of the placement table 24.
For this reason, as shown in FIG. 4, each air supply means 3 is detachably attached to each of two side openings 54 which are respectively opened on both side surfaces 5a of the work 5 at opposing target positions. Then, each hollow portion 52 of the work 5 (FIGS. 1, 2)
Compressed air nozzle unit 30 for ejecting compressed air to
Nozzle pressing portion 3 that presses and holds compressed air nozzle portion 30 on peripheral end surface 54a of lateral opening 54 of workpiece 5 (see FIG. 3).
Consists of 1.

The compressed air nozzle section 30 is held by a pressing plate 34 of a nozzle pressing section 31 described later. Therefore, the compressed air nozzle unit 30 can move in the direction of approaching and moving away from the side opening 54 of the work 5 together with the pressing plate 34 by the reciprocating operation of the cylinder 33. The compressed air nozzle unit 30 is connected to a compressed air supply source having an open / close valve (not shown) through a flexible passage 30a.
The pressure of the compressed air supplied from the compressed air supply source to the compressed air nozzle unit 30 via the opening / closing valve is 2 to 10 kg /
It is set to cm ^2. The pressure value of the compressed air is
Various changes are possible.

The nozzle pressing portion 31 is held on a side peripheral wall 60 of a rectangular box-shaped cover member 6 which covers the periphery of the work 5 at a predetermined interval and opens downward, and is provided with a cylinder rod 3.
Cylinder that operates in the reciprocating direction 2 (in the direction of arrows X1 and X3 on the right side of the work 5 shown in FIGS. 1, 2 and 4 and in the directions of X2 and X4 on the left side of the work 5). 33, a seal portion 34 having one end face connected to the tip of the cylinder rod 32 and the other end face made of an elastic body.
a with a pressing plate 34 provided with a.

The filter means 4 includes a filter 40 which is detachably mounted on the upper opening 53 of the work 5 mounted on the mounting surface 24a of the mounting table 24 of the vibration applying means 2;
The filter 40 has a filter pressing portion 41 that presses and holds the filter 40 so as to face the upper opening 53. Filter 40
The pressing plate 4 is held by a pressing plate 44 of a filter pressing portion 41 described later, and is attached to a plurality of exhaust holes 45 formed in the pressing plate 44.
4 together with the upper opening 53 of the work 5. Filter 40
It consists of a wire mesh (mesh 20 to 50). Note that the filter 40 is not limited to the wire mesh, but has a predetermined strength, and does not allow the abrasive particles 7 to be described later to pass, but includes holes having a size that allows the separated coating agent in the hollow portion 52 to pass. Any material can be used as long as it is suitable. For example, a vent plug or the like can be used.

The filter pressing portion 41 is held on the upper wall 61 of the cover member 6 and moves the cylinder rod 42 in a reciprocating direction (arrows Y1, Y2 shown in FIGS. 1, 2, and 4). An upper end surface side is connected to a tip end of the cylinder rod 42, and has a pressing plate 44 provided with a seal portion 44 a made of an elastic body on a lower end surface side facing the upper end surface 5 b of the work 5. The pressing plate 44 has a work 5 to be described later.
A plurality of exhaust holes 45 provided at positions opposed to the plurality of upper openings 53, and the filter 40 attached to each exhaust hole 45.

The work 5 used in the embodiment is an AC
It is manufactured by casting a high pressure casting method using an aluminum alloy such as 2B. The work 5 includes a cylinder block main body (hereinafter, referred to as main body) 50 having a substantially inverted T-shaped cross-section in front and extending to the right (depth side) as viewed from the left side (front side) in FIG. 2, 3 and 5, the main body 50 has a symmetrical shape on the left and right and front and back, is arranged at a predetermined interval in the longitudinal direction, and has two cylinder bores 51 penetrating vertically. An annular hollow portion 5 formed at a position surrounding each of the cylinder bores 51 and constituting a part of a circulation path of the circulating coolant.
2, a plurality of upper openings 53 for communicating horizontally with the hollow portion 52 from both side surfaces 5a of the main body 50 to supply the cooling liquid, and a cylinder bore 51 communicating vertically with the hollow portion 52 from the upper end surface 5b of the main body 50. A plurality of side openings 54 for discharging the cooled high-temperature cooling liquid are formed.

The cover member 6 is provided on the upper wall 61 thereof.
A suction passage 63 is provided, which communicates with the accommodation space 62 of the work 5 formed by placing the side peripheral wall 60 on the placement table 24 and is connected to a suction pump of a not-shown residual foreign matter collecting device (dust collector). ing. Further, the cover member 6 can be reciprocated vertically (see arrows Y1 and Y2 shown in FIG. 1) by an actuator (not shown), and move forward so that the side wall 60 is placed on the placement surface 24a of the placement table 24. When the work 5 is placed, the work 5 is covered at a predetermined interval, and can be held in a state where the accommodation space 62 is formed. When the work 5 is moved backward and detached from the placement surface 24a, the work 5 can be attached to and detached from the placement surface 24a. It is configured to be held in an unobstructed position.

The operation of the apparatus 1 of the embodiment configured as described above will be described. The cast workpiece 5 continues to be 50
After being held in the heating furnace at 0 ° C. for 2 hours, the upper opening 53 and the side opening 54 of the workpiece 5 are knocked out.
An operation for discharging core sand is performed, but the remaining foreign substances such as burned core sand and a coating agent remain on the wall surface 52a of the hollow portion 52. Therefore, it cannot be completely removed by ordinary shot blasting or the like. Therefore, as shown below using the device 1 of the embodiment,
An operation for removing the residual foreign matter is performed.

The mounting table 2 of the vibrator 22 of the removing device 1
A work 5 to be subjected to a residual foreign matter removing operation is placed on the work 4. A predetermined amount of abrasive grains 7, such as shot balls, grit, glass beads, steel, wire, etc., is introduced from the upper opening 53 of the work 5. The average particle size of the abrasive grains 7 is 0.5 to 2 mm. Next, after the cover member 6 is mounted on the mounting surface 24a of the mounting table 24, the cylinders 33 of the air supply means 3 and the cylinders 43 of the filtration means 4 are operated.

Then, each cylinder 33 of the air supply means 3
Moves the cylinder rod 32 forward (moving the work placed on the right side of the work 5 shown in FIGS. 1, 2 and 4 in the direction of arrow X1, moving the work placed on the left side of the work 5 in the direction of arrow X2). , The compressed air nozzle portion 30 together with the pressing plate 34
In the same direction. The pressing plate 34 is attached to the work 5 by a peripheral end surface 5 of the side opening 54 via a seal portion 34a.
4a, and is pressed and held. At this time, the work 5
Both side surfaces 5a are sandwiched between the pair of pressing plates 34 and fixed and held.

On the other hand, the cylinder 43 of the filtering means 4 moves the cylinder rod 42 forward (arrow Y1 shown in FIGS. 1, 2 and 4).
Direction) and the pressing plate 44 is interlocked. Then
The pressing plate 44 abuts on the upper end surface 5b of the work 5 via the seal portion 44a to hold the work. For this reason, the work 5 is pressed against the upper surface 24a of the mounting table 24 of the vibrator 22, clamped, interlocks with the mounting table 24 at the time of vibration, and is held in a state that withstands vibration.
Each filter 40 of the pressing plate 44 is mounted together with each exhaust hole 45 at a position communicating with each upper opening 53 of the work 5, and each upper opening 53 of the work 5 is
Sealed at 4a and kept airtight.

The workpiece 5 in the above state is vibrated by the vibrator 22 via the mounting table 24. On the other hand, at the same time, compressed air (see arrow a in FIG. 2) is jetted from the compressed air nozzle portion 30 of the pair of air supply means 3 into the hollow portion 52 of the work 5. Then, the abrasive grains 7 in the hollow portion 52 of the work 5 are wound up by the compressed air, and jump violently due to the applied vibration and vibrate violently, and the abrasive grains 7 and the wall surface 52a of the hollow portion 52 of the work 5 vibrate.
And abrasive particles 7 rub against the residual foreign matter such as core sand and coating agent, which are baked on the wall surface 52a.
The abrasive particles 7 violently hit the residual foreign material a.

As a result, the remaining foreign matter on the wall surface 52a is polished by the abrasive grains 7, and is separated and removed from the wall surface 52a. The coating agent peeled off from the wall surface 52a is successively mixed into the discharge flow of compressed air (see the arrow b in FIG. 2) and passes through the filter 40 of the filtering means 4 mounted on the upper opening 53 of the workpiece 5. Is discharged to the housing space 62 of the work 5 of the cover member 6. The separated coating agent discharged into the storage space 62 is supplied to the suction passage 63 provided in the upper wall 61 of the cover member 6 together with the discharge flow of compressed air (see arrow c in FIG. 2).
And is sucked and collected by a residual foreign matter collecting device (not shown) via the.

At this time, the abrasive grains 7 in the hollow portion 52 and the separated core sand are separated from the discharge flow of the compressed air by the filter 40 and do not fly out of the hollow portion 52. In this manner, when the cleaning of the wall surface 52a of the hollow portion 52 of the workpiece 5 is completed, the application of the vibration by the vibrator 22 and the ejection of the compressed air by each compressed air nozzle unit 30 are stopped.

Next, the cylinders 33 of the pair of air supply means 3 and the cylinders 43 of the filtration means 4 are operated in reverse to the above case. Then, the cylinder 33 of each air supply means 3
Moves the cylinder rod 32 backward (moving the work placed on the right side of the work 5 shown in FIGS. 1, 2 and 4 in the direction of arrow X3, and moving the work placed on the left side of the work 5 in the direction of arrow X4). , The compressed air nozzle portion 30 together with the pressing plate 34
In the same direction. The pressing plate 34 releases the pressing and holding of the peripheral end surface 54 a of the side opening 54 of the work 5.
At this time, the mounting of each compressed air nozzle unit 30 to each side opening 54 of the work 5 is also released.

On the other hand, the cylinder 43 of the filtering means 4 moves the cylinder rod 42 backward (arrow Y2 shown in FIGS. 1, 2 and 4).
Direction), and the pressing plate 44 is
The pressing and holding of b is released. Accordingly, the workpiece 5 is released from being clamped to the mounting surface 24a of the mounting table 24 of the vibrator 22. Thereafter, the mounting surface 24a of the mounting table 24
The cover member 6 is further detached, and the polished work 5 is taken out. Thereafter, the abrasive grains 7 are removed from the work 5 and the polishing is completed. The abrasive grains 7 used for the blasting remove the mixed core sand and are reused.

As described above, according to the removing apparatus 1 of the embodiment,
The nozzle pressing portion 31 of the air supply means 3 is operated on the workpiece 5 in which the abrasive grains 7 have been put into the hollow portion 52, and the compressed air nozzle portion 30 is pressed and held in the side opening 54 to be mounted and pressed. To the side opening 54 via the seal portion 34a.
In contact with the peripheral end surface 54a of the airbag 1 so that the side opening 54 is kept airtight. The filter pressing portion 41 of the filtering means 4
Is operated, and the filter 40 is pressed and held in the upper opening 53 via the exhaust hole 45 of the pressing plate 44 to be mounted.

Thereafter, vibration is applied by the vibrator 22 of the vibration applying means 2 to vibrate, and at the same time, compressed air is ejected from the compressed air nozzle portion 30 toward the hollow portion 52 of the work 5. As a result, the abrasive grains 7 that have jumped off are transferred to the wall surface 52 a and the wall surface 52 a of the hollow portion 52 of the vibrating work 5.
By causing collision and friction with the residual foreign matter that has been seized on the wall, the wall surface 52a is polished, and the residual foreign matter that has been firmly adhered up to now can be peeled off and removed from the wall surface 52a to be cleaned.

The wall 52a of the hollow portion 52 of the workpiece 5
Since the released coating agent is immediately discharged to the outside through the filter 40 through the hollow portion 52 together with the discharge flow b of the compressed air, the mixing ratio of the coating agent into the abrasive grains 7 can be reduced, The fluidity of the grains 7 is improved. Then, the polishing force of the abrasive grains 7 is improved, and the polishing time can be shortened. Further, since the peeled coating agent does not accumulate in the hollow portion 52, it is unnecessary to perform a secondary treatment on the peeled coating agent after using the removing apparatus 1 of the embodiment, which is advantageous in cost. It becomes something.

[0034]

According to the apparatus for removing foreign matter remaining in the hollow casting of the present invention (hereinafter referred to as the removing apparatus of the present invention), the hollow casting in which abrasive grains have been introduced into the hollow portion can be used.
The nozzle pressing portion of the air supply means is actuated, and the compressed air nozzle portion is pressed and held in one of the openings to be mounted and airtightly held. Further, the filter pressing portion of the filtering means is operated, and the filter is pressed and held in the other opening to be mounted.

Thereafter, vibration is applied by the vibration applying means to cause vibration, and at the same time, compressed air is ejected from the compressed air nozzle portion toward the hollow portion of the hollow casting. By this, the splashed abrasive grains collide with the wall surface of the hollow part of the vibrating hollow casting and the residual foreign matter that has been seized on the wall surface, and the friction is generated, so that the wall surface is polished and has been firmly adhered until now Residual foreign matter is peeled off and removed from the wall surface, and can be cleaned.

Further, since the mold wash separated from the wall surface of the hollow portion of the hollow casting is immediately discharged through the filter from the hollow portion and discharged to the outside together with the discharge flow of the compressed air, the mold wash is applied to the abrasive grains. Can be reduced, and the fluidity of the abrasive grains is improved. Then, the abrasive power of the abrasive grains is improved, and the abrasive time can be reduced. Further, since the peeled coating agent does not accumulate in the hollow portion, it is unnecessary to perform a secondary treatment on the peeled coating agent after using the removing apparatus of the present invention, which is advantageous in terms of cost. Becomes

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a removing device of an embodiment and showing a state where a hollow casting is placed on a placing portion of a vibration imparting means of the removing device.

FIG. 2 is a cross-sectional view showing the removing device of the embodiment and showing a use state of the removing device.

FIG. 3 is a perspective view showing the appearance of the hollow casting in FIGS. 1 and 2 in perspective.

FIG. 4 is a perspective view showing a perspective view of an appearance of a main part of the removing device in FIG. 2;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... The removal apparatus of the foreign substance which remained in the hollow casting 2 ... Vibration imparting means 22 ... Exciter 23 ... Support spring 24 ... Mounting table 3 ... Air supply means 30 ... Compressed air nozzle part 31
... Nozzle pressing part 32 ... Cylinder rod 33 ... Cylinder 34 ... Pressing plate 34a ... Seal part 4 ... Filtering means 40 ... Filter 41 ...
Filter pressing part 42 ... Cylinder rod 43 ... Cylinder 44
... Pressing plate 44a ... Seal part 45 ... Exhaust hole 5 ... Work 50 ... Cylinder block body 51 ... Cylinder bore 52 ... Hollow part 53 ... Top opening 5
4 ... side opening 6 ... cover member 7 ... abrasive

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-367366 (JP, A) JP-A-3-297552 (JP, A) JP-A-63-16853 (JP, A) JP-A-58-1983 148073 (JP, A) JP-A-1-205865 (JP, A) JP-A-3-234471 (JP, A) JP-A-64-16375 (JP, A) JP-A-62-109854 (JP, U) Japanese Utility Model Application Sho 64-49359 (JP, U) Japanese Patent Publication No. 44-18833 (JP, B1) (58) Fields investigated (Int. Cl. ⁷ , DB name) B22D 29/00 B22D 29/02 B22D 29/04

Claims (1)

(57) [Claims] 1. A vibration casting means for mounting a hollow casting having a hollow portion and a plurality of openings communicating with the hollow portion and applying vibration to the hollow casting, and mounted on the vibration giving means. An air having a compressed air nozzle portion detachably mounted on at least one of the openings of the hollow casting and ejecting compressed air to the hollow portion, and a nozzle pressing portion for pressing and holding the compressed air nozzle portion in the opening. Filtering means having a supply means, a filter removably attached to the other opening of the hollow casting placed on the vibration applying means, and a filter pressing part for pressing and holding the filter in the opening. And a device for removing foreign matter remaining inside a hollow casting.