CN112372518B - Sand core shot blasting machine - Google Patents

Abstract

The invention discloses a sand core shot blasting machine, wherein a shot blasting box is arranged on a support rack and consists of a shot blasting box body and a shot blasting box cover; the air injection pipe at the tail end of the air injection device is arranged at the bottom of the inner side of the shot blasting box body; a shot blasting bin pore plate is arranged in the shot blasting box body, the shot blasting bin pore plate and a shot blasting box cover are combined to form the shot blasting bin, and the inner diameter of a shot blasting hole on the shot blasting bin pore plate is smaller than the outer diameter of shot blasting particles; the sand core supporting device is rotatably arranged on the inner side of the orifice plate of the shot spraying bin; in the electric control system, a driving motor is in transmission connection with a sand core supporting device; the sand core is arranged on the sand core supporting device, the sand core supporting device drives the sand core to rotate under the driving of the driving motor, and meanwhile, high-pressure gas is sprayed out through the gas spraying pipe to disturb shot blasting particles in the shot blasting bin to be wrapped on the outer surface of the sand core for shot blasting finishing. The invention can realize the shot blasting treatment of the surface of the sand core in 360 degrees without dead angles, so that the cleaning qualification rate of the sand core reaches 100 percent, and the manufacturing and maintenance cost is lower.

Description

Sand core shot blasting machine

Technical Field

The invention belongs to the technical field of sand core maintenance and repair, and particularly relates to a sand core shot blasting machine.

Background

The sand core is a material used for manufacturing a core in casting production, and is generally formed by mixing molding materials such as casting sand, a molding sand binder, an auxiliary additive and the like according to a certain proportion. The surface quality of the sand core will directly determine the quality of the cast part.

In the use process of the sand core, with the extension of casting times or service time, redundant structures such as fins and the like are inevitably generated on the surface of the sand core, parts cast by the sand core with the fins have serious technical defects, such as cylinder cover flash and the like, and a casting is directly eliminated as a waste product, so that the surface of the sand core needs to be regularly cleaned and repaired to maintain the surface quality of the sand core.

In the prior art, two general ways of repairing the sand core are provided, namely cleaning a manual handheld brush and clamping a brush by a robot; wherein:

the brush is manually held for cleaning, so that the condition of missed repair often occurs due to the influence of artificial subjective factors, the manual cleaning efficiency is low, and the labor cost is high;

the mode of cleaning the robot hand-held brush can effectively solve the problem of missed repair because the robot is modified according to a set program track, but the manufacturing cost of equipment for cleaning the robot hand-held brush is extremely high, and the later maintenance cost is also high.

Further, although some researchers have proposed deburring and other repair of the surface of the sand core by shot blasting, most of the shot blasting objects of the conventional shot blasting machines are metal surfaces, most of the shot blasting particles are steel shots, and a very small number of plastic particles are used as shot blasting particles.

The shot blasting modes adopt fixed tracks aiming at the specific position of a workpiece to be processed, and shot blasting is carried out by adopting the high-pressure injection head, but the sand core structure is complex, the position of a flash is not fixed, the shot blasting equipment in the prior art cannot carry out 360-degree dead-angle-free shot blasting on the sand core, the repair leakage condition can be caused, and the high-pressure injection mode is easy to damage the surface of the sand core.

Disclosure of Invention

Aiming at the defects in the prior art, the invention discloses a sand core shot blasting machine which can realize the shot blasting treatment of 360 degrees without dead angles on the surface of a sand core, so that the qualified rate of sand core cleaning reaches 100 percent, and the manufacturing and maintenance cost is lower. The technical scheme of the invention is as follows by combining the attached drawings of the specification:

a sand core shot blasting machine comprises a support rack 1, an air injection device, a shot blasting box, a shot blasting bin, a sand core support device and an electric control system;

the shot blasting box is arranged on the support rack 1 and consists of a shot blasting box body 2 and a shot blasting box cover 3;

the gas injection pipe 12 at the tail end of the gas injection device is arranged at the bottom of the inner side of the shot blasting box body 2;

a shot blasting bin pore plate 4 is arranged in the shot blasting box body 2, the shot blasting bin pore plate 4 and a shot blasting box cover 3 are combined to form the shot blasting bin, and the inner diameter of a shot blasting hole on the shot blasting bin pore plate 4 is smaller than the outer diameter of shot blasting particles;

the sand core supporting device is rotatably arranged on the inner side of the shot spraying bin orifice plate 4;

in the electric control system, a driving motor 6 is in transmission connection with the sand core supporting device;

the sand core is arranged on the sand core supporting device, the sand core supporting device drives the sand core to rotate under the driving of the driving motor 6, and meanwhile, high-pressure gas is sprayed out through the gas spraying pipe 12 to disturb shot blasting particles in the shot blasting bin to be wrapped on the outer surface of the sand core for shot blasting finishing.

Furthermore, the air injection device consists of a high-pressure air source, an air guide pipe 11, an air injection pipe 12, a switching electromagnetic valve 9 and a pressure regulating valve 10;

the two ends of the gas injection pipe 12 are connected with a high-pressure gas source pipeline through a gas guide pipe 11, and a pressure regulating valve 10 and a switch electromagnetic valve 9 are sequentially connected on the pipeline through which the high-pressure gas source is communicated with the gas guide pipe 11.

Furthermore, a row of equidistant air injection holes 1201 are formed in the air injection pipe 12;

the outer contour of the gas orifice 1201 is circular, the middle part of the gas orifice 1201 is a strip-shaped gas orifice with the same width, and the section of the strip-shaped gas orifice is an inverted isosceles trapezoid.

Further, the peen box cover 3 is formed in a semi-cylindrical shape, and one side of the peen box cover 3 is hinged to the top edge of the peen box cover 3.

Furthermore, the shot blasting bin orifice plate 4 is a semi-cylindrical plate, and two axial ends of the shot blasting bin orifice plate 4 are fixedly connected with the side wall of the shot blasting box body 2 and are matched, butted and combined with the shot blasting box cover 3 to form a cylindrical shot blasting bin.

Further, the sand core supporting device adopts a rotating bracket 5

And two ends of the rotary bracket 5 are rotatably supported and arranged on the side wall of the shot blasting box body 2 at the inner side of the shot blasting bin orifice plate 4.

Further, the electric control system also comprises an electric control box 8 and a start button 7;

the electric cabinet 8 is arranged on the side surface of the support rack 1;

the starting button 7 is arranged on the outer side wall of the shot blasting box body 2 and is used for controlling the starting of the driving motor 6.

Further, the electronic control system further comprises a counter;

the counter is arranged on the sand core supporting device and used for detecting the number of the sand core supporting device driving the sand core to rotate, and further accurately controlling the shot blasting time.

Compared with the prior art, the invention has the beneficial effects that:

1. the sand core shot blasting machine disclosed by the invention has the advantages that the air blowing device is adopted to blow air into the shot blasting cabin filled with shot blasting particles, so that the shot blasting particles in the shot blasting cabin completely cover the workpiece, and the workpiece rotates in the shot blasting cabin, so that the 360-degree shot blasting treatment on the surface of the sand core is realized, and the qualified rate of sand core cleaning reaches 100%.

2. The sand core shot blasting machine can control the on-off of the compressed air blown into the shot blasting bin and the pressure of the compressed air blown into the shot blasting bin through the switch electromagnetic valve and the pressure regulating valve arranged in the blowing device, is suitable for sand cores with different surface hardness, and avoids damaging the surface of the sand core.

3. According to the sand core shot blasting machine, the air holes with special structures are formed in the air outlet of the air blowing pipe, so that the air blown out of the air blowing pipe can apply disturbance to shot blasting particles in the shot blasting bin in the largest range, and the sand core can be fully wrapped by the shot blasting particles.

4. According to the sand core shot blasting machine, the counter is arranged at the sand core installation tool to set the number of the rotation cycles of the sand core in the shot blasting bin, so that the shot blasting time is accurately controlled, and the damage to the surface of the sand core caused by shot blasting transition is avoided.

Drawings

FIG. 1 is a schematic perspective view of a sand core shot-blasting machine according to the present invention;

FIG. 2 is a front view of the sand core peening machine of the present invention (shot peening booth cover open);

FIG. 3 is a top view of the sand core peening machine of the present invention;

FIG. 4 is a schematic three-dimensional structure of a gas nozzle in the sand core shot-blasting machine according to the present invention;

FIG. 5 is an enlarged view of the gas injection hole structure at I in FIG. 4;

fig. 6 is a sectional view taken along line a-a of fig. 5.

In the figure:

1-supporting rack, 2-shot blasting box body, 3-shot blasting box cover,

4-a pill spraying bin orifice plate, 5-a rotary bracket, 6-a driving motor,

7-a start button, 8-an electric cabinet, 9-an electromagnetic valve,

10-a pressure regulating valve, 11-an air duct and 12-an air injection pipe;

1201-gas injection holes.

Detailed Description

For clearly and completely describing the technical scheme and the specific working process thereof, the specific implementation mode of the invention is as follows by combining the attached drawings of the specification:

in the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

As shown in fig. 1, 2 and 3, the invention discloses a sand core shot blasting machine, which comprises a support rack, an air injection device, a shot blasting box, a shot blasting bin, a sand core support device and an electric control system.

The support rack 1 is composed of a support frame and a horizontal table top, the support frame is formed by splicing sectional materials, and the horizontal table top is horizontally fixed on the top of the support frame.

The gas injection device comprises: a high-pressure air source (not shown in the figure), an air duct 11, an air injection pipe 12, a switch electromagnetic valve 9 and a pressure regulating valve 10; wherein, both ends of the gas injection pipe 12 are connected with a high-pressure gas source pipeline through a gas guide pipe 11, and a pressure regulating valve 10 and a switch electromagnetic valve 9 are sequentially connected on the pipeline through which the high-pressure gas source is communicated with the gas guide pipe 11;

after being output by a high-pressure gas source, high-pressure gas sequentially enters the gas guide tube 11 through the pressure regulating valve 10 and the opened switching electromagnetic valve 9, enters the gas ejector tube 12 and is finally ejected through a gas ejecting hole in the gas ejector tube 12, wherein the switching electromagnetic valve 9 is used for controlling the on-off of the high-pressure gas blown into the shot-blasting bin, and the pressure regulating valve 10 is used for controlling the pressure of the high-pressure gas blown into the shot-blasting bin, so that the sand core spraying device is suitable for sand cores with different surface hardness and avoids damaging the surface of the sand core;

the gas injection pipe 12 is positioned at the bottom of the shot blasting box body 2 so as to realize the high-pressure gas injection into the shot blasting box through the gas injection pipe 12;

as shown in fig. 4, a row of equidistant gas orifices 1201 are formed in the gas injection pipe 12, as shown in fig. 5 and 6, the outer contour of the gas orifices 1201 is circular, the middle part of the gas orifices 1201 is in a longitudinal grid shape, strip-shaped gas orifices with equal width are formed on the gas orifices 1201, the cross sections of the strip-shaped gas orifices are in an inverted isosceles trapezoid shape, and the structure enables the gas ejected through the gas orifices 1201 to apply disturbance in the largest range to shot blasting particles in the shot blasting bin, so that the shot blasting particles can fully wrap the sand core.

As shown in fig. 1 and 2, the shot box is composed of a shot box body 2 and a shot box cover 3; the shot blasting box body 2 is of a cubic structure with an opening at the top, the bottom and the periphery of the shot blasting box body 2 are relatively sealed, and the air guide pipes 11 are arranged around the outer periphery of the shot blasting box body 2, penetrate through the side wall of the shot blasting box body 2 and are connected with two ends of the air injection pipes 12 on the inner side of the shot blasting box body 2; the shot blasting box cover 3 is semi-cylindrical, one side of the shot blasting box cover 3 is hinged with the top edge of the shot blasting box cover 3, the shot blasting box cover 3 is opened and closed, and a handle is arranged on the outer side of the shot blasting box cover 3.

As shown in fig. 1, 2 and 3, a shot blasting bin pore plate 4 is installed above the inner side of the shot blasting box body 2, the shot blasting bin pore plate 4 is a semi-cylindrical plate, circular shot blasting holes are uniformly formed in the shot blasting bin pore plate 4, the pore diameter of each shot blasting hole is smaller than the outer diameter of shot blasting particles, two axial ends of the shot blasting bin pore plate 4 are fixedly connected with the side wall of the shot blasting box body 2, the semicircular openings of the shot blasting bin pore plate 4 face upwards, and after the shot blasting box cover 3 is closed, the shot blasting bin pore plate 4 and the shot blasting box cover 3 are matched and butted to form a cylindrical shot blasting bin;

when the high-pressure gas is output by a high-pressure gas source and is sprayed out by the gas spraying pipe 1, the high-pressure gas enters the shot blasting box body 2 and enters the shot blasting bin through shot blasting holes in the shot blasting bin hole plate 4, and shot blasting particles in the shot blasting bin are driven to fully wrap the sand core, so that the correction of the sand core is realized.

As shown in fig. 1, 2 and 3, the sand core supporting device adopts a rotary bracket 5, and two ends of the rotary bracket 5 are rotatably supported and installed on the side wall of the shot blasting box body 2 at the inner side of the shot blasting bin orifice plate 4 and are used for fixedly supporting the sand core.

As shown in fig. 1, 2 and 3, the electronic control system includes: an electric cabinet 8, a start button 7, a driving motor 6 and a counter; wherein, the electric cabinet 8 is arranged on the side surface of the support rack 1; the starting button 7 is arranged on the outer side wall of the shot blasting box body 2 and is used for controlling the starting of the driving motor 6; the driving motor 6 is arranged on the outer side wall of the shot blasting box body 2, and an output shaft of the driving motor 6 is in transmission connection with the rotating support 5 so as to drive the rotating support 5 to drive the sand core to rotate and realize 360-degree shot blasting treatment on the surface of the sand core by matching with shot blasting; the counter is arranged on the rotating bracket 5 and used for detecting the number of the rotating cycles of the rotating bracket 5 driving the sand core to rotate, so that the shot blasting time is accurately controlled, and the damage to the surface of the sand core caused by shot blasting transition is avoided.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.

Claims (8)

1. A sand core shot blasting machine is characterized in that:

the sand core blasting machine comprises a supporting rack (1), an air injection device, a shot blasting box, a shot blasting bin, a sand core supporting device and an electric control system;

the shot blasting box is arranged on the support rack (1) and consists of a shot blasting box body (2) and a shot blasting box cover (3);

the gas injection pipe (12) at the tail end of the gas injection device is arranged at the bottom of the inner side of the shot blasting box body (2);

a shot blasting bin pore plate (4) is arranged in the shot blasting box body (2), the shot blasting bin pore plate (4) and a shot blasting box cover (3) are combined to form the shot blasting bin, and the inner diameter of a shot blasting hole in the shot blasting bin pore plate (4) is smaller than the outer diameter of shot blasting particles;

the sand core supporting device is rotatably arranged on the inner side of the shot spraying bin orifice plate (4);

in the electric control system, a driving motor (6) is in transmission connection with the sand core supporting device;

the sand core is arranged on the sand core supporting device, the sand core supporting device drives the sand core to rotate under the driving of the driving motor (6), and meanwhile, high-pressure gas is sprayed out through the gas spraying pipe (12) to disturb shot blasting particles in the shot blasting bin to be wrapped on the outer surface of the sand core for shot blasting finishing.

2. The sand core shot-blasting machine of claim 1, wherein:

the air injection device consists of a high-pressure air source, an air guide pipe (11), an air injection pipe (12), a switch electromagnetic valve (9) and a pressure regulating valve (10);

the two ends of the jet pipe (12) are connected with a high-pressure air source pipeline through an air duct (11), and a pressure regulating valve (10) and a switch electromagnetic valve (9) are sequentially connected on the pipeline through which the high-pressure air source is communicated with the air duct (11).

3. The sand core blasting machine of claim 1 or 2, wherein:

a row of gas injection holes (1201) with equal intervals are formed in the gas injection pipe (12);

the outer contour of the gas orifice (1201) is circular, the middle part of the gas orifice (1201) is a strip-shaped gas orifice with the same width, and the section of the strip-shaped gas orifice is in an inverted isosceles trapezoid shape.

4. The sand core shot-blasting machine of claim 1, wherein:

the shot blasting box cover (3) is semi-cylindrical, and one side of the shot blasting box cover (3) is hinged with the top edge of the shot blasting box body (2).

5. The sand core shot-blasting machine of claim 4, wherein:

the shot blasting bin pore plate (4) is a semi-cylindrical plate, and the two axial ends of the shot blasting bin pore plate (4) are fixedly connected with the side wall of the shot blasting box body (2) and matched, butted and combined with the shot blasting box cover (3) to form a cylindrical shot blasting bin.

6. The sand core shot-blasting machine of claim 1, wherein:

the sand core supporting device adopts a rotating bracket (5)

Two ends of the rotary bracket (5) are rotatably supported and arranged on the side wall of the shot blasting box body (2) on the inner side of the shot blasting bin pore plate (4).

7. The sand core shot-blasting machine of claim 1, wherein:

the electric control system also comprises an electric control box (8) and a start button (7);

the electric cabinet (8) is arranged on the side surface of the support rack (1);

the starting button (7) is arranged on the outer side wall of the shot blasting box body (2) and used for controlling the starting of the driving motor (6).

8. The sand core blasting machine of claim 1 or 7, wherein:

the electric control system further comprises a counter;

the counter is arranged on the sand core supporting device and used for detecting the number of the sand core supporting device driving the sand core to rotate, and further accurately controlling the shot blasting time.

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