JP5179167B2 - Shot blasting equipment - Google Patents

Description

  The present invention relates to a shot blasting facility for performing a shot blasting process on a workpiece, and more particularly to a technique for removing shot grains remaining on the surface of the workpiece.

  Conventionally, when removing scales and the like formed on the surface of a workpiece such as a steel plate, a shot blasting facility for performing shot blasting on the surface of the workpiece is used. Specifically, the shot blasting equipment is provided with a transport table for transporting the workpiece and a projection chamber for projecting shot grains onto the surface of the workpiece to be transported. A plurality of projection chambers are provided side by side in the conveyance direction of the workpiece. And while the workpiece passes through the plurality of projection chambers, the surface of the workpiece is shot blasted.

  By the way, in such blast equipment, shot grains may remain on the surface of the workpiece discharged from the projection chamber. The shot grains remaining on the surface of the work material hinder the collision of the shot grains projected in the subsequent projection chamber with the work material surface. Therefore, in the shot blasting equipment, the scale removal effect is reduced by the shot grains remaining on the surface of the workpiece.

  In the shot blasting equipment, in order to remove such shot grains remaining on the surface of the workpiece, for example, blow-off by air blow or scraping by a rubber curtain (scraper) is performed.

  However, when the surface of the workpiece has irregularities, the shot grains remaining on the surface of the workpiece may not be blown off by air blow. In particular, if the unevenness on the surface of the workpiece is large, a difference in distance occurs between the unevenness and the air blow outlet, so that sufficient air discharge force cannot be obtained due to pressure loss resistance, and the workpiece The shot grains accumulated in the recesses remain. Such a problem also applies to scraping with a scraper.

  For this reason, conventionally, shot particles remaining on the surface of the workpiece are also manually swept away, but in such operations, the efficiency of shot blasting is significantly reduced.

  Furthermore, when shot grains remain on the surface of the workpiece, the shot grains remaining on the surface of the workpiece may cause leakage to the outside. Therefore, in this case, a safety and health problem due to generation of dust and an economic problem due to loss of shot grains are caused.

On the other hand, in order to remove shot grains remaining on the surface of the workpiece, a method of tilting the workpiece has also been proposed (see Patent Document 1). However, this method requires a tilting device that tilts the workpiece, so that there is a drawback that if the workpiece is large (heavy), the tilting device also becomes large.
Japanese Patent Application Laid-Open No. 2004-66348

  The present invention has been proposed in view of such conventional circumstances, and an object of the present invention is to provide a shot blasting facility capable of efficiently removing shot grains remaining on the surface of a workpiece.

The gist of the present invention aimed at solving the above problems is as follows.
(1) A shot blasting facility for performing a shot blasting process on a workpiece,
A transport device for transporting the workpiece;
A projection chamber for projecting shot grains on the surface of the workpiece conveyed by the conveying device;
A removal device for removing shot grains remaining on the surface of the workpiece,
The removing device includes a belt to which a brush for cleaning the surface of the workpiece is attached, and the brush is moved to the workpiece while rotating the belt in a direction intersecting with a conveyance direction of the workpiece. Shot blasting equipment characterized by contacting the surface of the material .
( 2 ) The shot blasting equipment according to ( 1 ), wherein the removing device has a plurality of the belts arranged side by side.
( 3 ) The removal apparatus has a pair of belts arranged side by side on the one side and the other side in the width direction across the central portion of the workpiece, while rotating the belts in opposite directions. The shot blasting equipment according to ( 2 ), wherein the brush brought into contact with the surface of the workpiece is cleaned from the inside to the outside of the workpiece.
( 4 ) The shot according to any one of (1) to ( 3 ), wherein the removing device includes an adjustment mechanism that adjusts a height of a brush that contacts the surface of the workpiece. Blasting equipment.
( 5 ) The shot blasting equipment according to any one of (1) to ( 4 ), wherein a plurality of the projection chambers are provided side by side in a conveyance direction of the workpiece.

  As described above, in the shot blasting equipment according to the present invention, the surface of the workpiece is wiped off with the brush while the shot grains remaining on the surface of the workpiece are swept away to the surface of the workpiece. Even when there are irregularities, it is possible to appropriately remove the remaining shot grains.

  Hereinafter, shot blasting equipment to which the present invention is applied will be described in detail with reference to the drawings. In the drawings used in the following description, in order to make the features easy to understand, there are cases in which the portions that become the features are schematically shown for convenience, and the dimensional ratios of the respective components are not always the same as the actual ones. Absent.

  In the shot blasting equipment to which the present invention is applied, for example, as shown in FIGS. 1 and 2, in order to remove scales and the like formed on the surface of the workpiece W such as a steel plate, the workpiece W is subjected to shot blast processing. It is something to apply.

  Specifically, the shot blasting equipment includes a transport device 10 that transports the workpiece W, first and second projection chambers 20A and 20B that project shot grains onto the surface of the workpiece W, and the workpiece. First and second removing devices 30A and 30B for removing shot grains remaining on the surface of W are provided.

  The conveying apparatus 10 has a plurality of conveying rolls 11 arranged side by side at a predetermined interval, and the workpiece W is conveyed on the conveying rolls 11 while rotating the conveying rolls 11. Yes.

  The first projection chamber 20A and the second projection chamber 20B are provided side by side in the conveyance direction of the workpiece W. The first and second projection chambers 20 </ b> A and 20 </ b> B include a cabinet 21 that covers the conveyance path of the workpiece W conveyed by the conveyance device 10, so that the workpiece W passes through the cabinet 21. It has become.

  In the first and second projection chambers 20A and 20B, an impeller 22 for projecting shot grains onto the surface of the workpiece W, and a screw conveyor 23 and a bucket elevator 24 for supplying shot grains to the impeller 22 are arranged. ing.

  Two impellers 22 are provided side by side in the width direction at the top and bottom of the cabinet 21, and it is possible to project shot grains from above and below on both surfaces of the workpiece W transported by the transport roll 11. It has become.

  Further, the shot particles projected from the impeller 22 fall on the bottom of the cabinet 21, and then are carried by the screw conveyor 23 and the bucket elevator 24 and can be reintroduced into the upper and lower impellers 22.

  The first and second removal devices 30A and 30B are arranged on the exit sides of the first and second projection chambers 20A and 20B in the cabinet 21, respectively. And these 1st and 2nd removal apparatus 30A, 30B removes the shot grain which remained on the surface (upper surface) of the workpiece W among the shot grains projected from the impeller 22, In order to remove the workpiece W Has a pair of belts 32A and 32B to which a brush 31 for brushing the surface is attached.

  The pair of belts 32A and 32B are endless belts having a certain width wound between the pair of pulleys 33a and 33b, and can be rotated by the drive motor 34 between the pair of pulleys 33a and 33b. It has become. The brushes 31 implanted on the surfaces of the belts 32A and 32B are arranged in a straight line in the width direction of the belts 32A and 32B, and are arranged at regular intervals over the entire circumference of the belts 32A and 32B. Yes.

  Further, of the pair of belts 32A and 32B, one belt 32A is disposed along the width direction on one side in the width direction across the central portion of the workpiece W, and the other belt 32B is It arrange | positions along the width direction on the other side across the center part of the workpiece W. The pair of belts 32A and 32B are rotated in the opposite directions, and the brush 31 brought into contact with the surface of the workpiece W is wiped from the inside to the outside of the workpiece W. Shot grains remaining on the surface of the workpiece W can be efficiently swept away.

  Further, the first and second removing devices 30A and 30B respectively move up and down the pair of belts 32A and 32B to adjust the height of the brush 31 that contacts the surface of the workpiece W, 35b.

  The pair of adjusting mechanisms 35a and 35b includes an actuator 36 that moves up and down a drive pulley 33a disposed on the outer side in the width direction of the pair of belts 32A and 32B, and the height of the brush 31 is adjusted by the actuator 36. It is possible to do. Further, by adjusting the height of the brush 31, it is possible to arbitrarily adjust the contact pressure of the brush 31 with respect to the surface of the workpiece W according to the thickness of the workpiece W, the wear amount of the brush 31, and the like. It has become.

  In the shot blasting equipment having the structure as described above, the workpiece W conveyed by the conveying device 10 passes through the first and second projection chambers 20A and 20B, and the surface of the workpiece W The shot blasting is performed. Further, in this shot blasting equipment, the first and second removal devices 30A and 30B arranged on the exit side of the first and second projection chambers 20A and 20B each have a brush 31 on the surface of the workpiece W. While wiping, shot grains remaining on the surface of the workpiece W are continuously swept away.

  In this case, since the brush 31 in contact with the surface of the workpiece W bends and follows the irregularities on the surface of the workpiece W, the shot grains accumulated in the recesses can also be swept off at the tip of the brush 31. . Therefore, in this shot blasting equipment, even when the surface of the workpiece W is uneven, it is possible to appropriately remove the shot grains remaining on the surface of the workpiece W.

  Further, in this shot blasting equipment, the first removal device 30A disposed between the first projection chamber 20A and the second projection chamber 20B appropriately removes the shot grains remaining on the surface of the workpiece W. By doing so, the scale removal effect in the second projection chamber 20B can also be improved. Furthermore, with this shot blasting equipment, it is possible to prevent the shot grains remaining on the surface of the workpiece W from leaking to the outside.

  In addition, since the rated capacity of the drive motor 34 for rotating the belts 32A and 32B is smaller than the rated capacity of the blower used in conventional blow-off by air blow, an energy saving effect is also expected when continuous operation is performed. it can.

In addition, this invention is not necessarily limited to the structure of the said shot blasting equipment, A various change can be added in the range which does not deviate from the meaning of this invention.
For example, the shot blasting equipment has a configuration in which the two projection chambers 20A and 20B are arranged in the transport path of the workpiece W transported by the transport device 10, but the present invention is not limited to such a configuration. About a room | chamber, it can be set as the structure arrange | positioned at least 1 room | chamber or 2 or more rooms.

  The first and second projection chambers 20A and 20B have a configuration in which two impellers 22 are arranged side by side in the width direction above and below the cabinet 21 (total of eight). The arrangement and number of 22 can be arbitrarily adjusted.

  In the shot blasting equipment, two removal devices 30A and 30B are arranged on the exit side of the two projection chambers 20A and 20B. However, at least one or two or more removal devices are arranged. Is possible.

  Furthermore, it is possible to arbitrarily adjust the number and arrangement of belts included in each removing device, and the brushes are brought into contact with the surface of the workpiece W while rotating the pair of belts 32A and 32B in the opposite directions. The brush 31 is moved to the workpiece W while rotating the belt 31 in a direction intersecting with the conveying direction of the workpiece W. The surface may be configured to be in contact with the surface.

  In the first and second removing devices 30A and 30B, a pair of adjusting mechanisms 35a and 35b is provided. However, when a shot blasting process is performed on a workpiece W having a certain thickness. For example, an adjustment mechanism for adjusting the height of the brush 31 may not be provided.

  Moreover, about the said conveying apparatus 10, not only the structure by which the workpiece W is conveyed on the conveyance roll 11 should just use the conveyance method suitable for the kind of this workpiece W, a shape, a dimension, etc. .

FIG. 1 is a side view showing a configuration example of a shot blasting apparatus to which the present invention is applied. FIG. 2 is a front view showing the configuration of the projection chamber of the shot blasting equipment shown in FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Conveyance apparatus 11 ... Conveyance roll 20A ... 1st projection chamber 20B ... 2nd projection chamber 21 ... Cabinet 22 ... Impeller 23 ... Screw conveyor 24 ... Bucket elevator 30A ... 1st removal apparatus 30B ... 2nd removal apparatus DESCRIPTION OF SYMBOLS 31 ... Brush 32A ... One belt 32B ... The other belt 33a, 33b ... Pulley 34 ... Drive motor 35a, 35b ... Adjustment mechanism 36 ... Actuator

Claims (5)

A shot blasting facility for performing a shot blasting process on a workpiece,
A transport device for transporting the workpiece;
A projection chamber for projecting shot grains on the surface of the workpiece conveyed by the conveying device;
A removal device for removing shot grains remaining on the surface of the workpiece,
The removing device includes a belt to which a brush for cleaning the surface of the workpiece is attached, and the brush is moved to the workpiece while rotating the belt in a direction intersecting with a conveyance direction of the workpiece. The shot blasting equipment according to claim, wherein the shot blasting equipment is brought into contact with the surface of the material .   The shot blasting equipment according to claim 1, wherein the removing device has a plurality of the belts arranged side by side.   The removing device has a pair of belts arranged side by side on the one side and the other side in the width direction across the center of the workpiece, and while rotating the belts in opposite directions, 3. The shot blasting equipment according to claim 2, wherein the brush brought into contact with the surface of the workpiece is cleaned from the inside to the outside of the workpiece.   The shot blasting equipment according to any one of claims 1 to 3, wherein the removing device includes an adjustment mechanism that adjusts a height of a brush that contacts a surface of the workpiece.   The shot blasting equipment according to any one of claims 1 to 4, wherein a plurality of the projection chambers are provided side by side in a conveying direction of the workpiece.

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