JP2013031891A - Successive shot blast apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a successive shot blast apparatus that can grind an object to be ground while automatically turning the object so as to evenly grind the whole circumferential surface of the object efficiently in a short time even if the object has a large-diameter, and also can successively perform loading, grinding and discharge of the object.SOLUTION: In the shot blast apparatus, an endless annular belt 1 is wound around pulleys 2, 3, 4 to form a recessed groove-like trough 5 between pulleys 2, 3. The shot blast apparatus projects a grinding material to the object to be ground while turning the object to be ground W that is placed in the trough, by the turn of the endless annular belt. In the shot blast apparatus, a guide rib 8 protrudes from the surface of the endless annular belt while spirally revolving around the surface. The guide rib pushes and urges the object to be ground that is turned inside the trough by the revolving endless annular belt to feed the object in a discharge direction.

Description

  The present invention relates to a continuous shot blasting apparatus capable of projecting a polishing material while rolling and moving an object to be polished to efficiently and evenly clean the entire surface around the object to be polished.

  As a technique for automatically rolling the material to be polished so that the material to be polished is projected evenly and continuously by projecting the material to the entire surface around the object to be polished, a long steel material is provided with a slit. There is a shot blasting device that is configured in a cylindrical cage, and that has a spiral conveying member inside to convey an object to be polished, and projects the abrasive from the outside of the cylindrical cage (see Patent Document 1). ). This is because the abrasive is projected by the projector while rolling a large number of small-diameter objects to be cleaned placed in the cylinder, and the objects to be polished can be continuously cleaned.

JP 2000-343430 A

Although the above-described conventional shot blasting apparatus can polish the object to be polished while continuously conveying it, the polishing material projected from the projector passes through the slit of the cylindrical cage and the object to be polished As a result, the polishing material that collides with the long steel material and does not pass through the slit and scatters around has been generated to some extent. Although the passing rate of the scouring material is improved if the long steel material is made thinner, there is a trade-off problem that the thin steel material is likely to be damaged by the collision of the scouring material.
Therefore, a continuous shot blasting device that can continuously input, sharpen, and discharge the object to be polished without causing the projection of the material to be polished to interfere with the object to be polished. The realization of was awaited.

  The present invention has been made in view of the above-described circumstances, and its purpose is to automatically clean the entire surrounding area evenly in a short time even for a large-diameter object to be cleaned. In addition, the object to be polished can be fed, scoured, and discharged without the presence of an obstacle that impedes the projection of the blast material between the projector and the object to be polished. It is an object of the present invention to provide a continuous shot blasting apparatus capable of continuously performing the above.

In the continuous shot blasting apparatus of the present invention, an endless annular belt is wound around a plurality of pulleys to form a trough having a concave groove between the pulleys, and the object to be cleaned put in the trough is rotated by the endless annular belt. In the shot blasting device that projects the abrasive while rolling by the guide, the guide rib of the ridge is spirally formed on the surface of the endless annular belt and rolled in the trough by the endless annular belt rotating around The sweeping material is pushed by the guide ribs and sent in the discharge direction.
By adopting such a configuration, even a large-scale object to be cleaned can be cleaned while automatically rolling so that the entire surrounding surface can be efficiently cleaned evenly in a short time. In addition, it is possible to continuously perform the input, the scouring, and the discharge of the scouring material without causing the projection of the scouring material to exist between the projector and the scouring material.

  Further, the guide rib is formed by connecting trapezoidal ribs in a straight line, and a gap between adjacent ribs is opened in a state of being wound around a pulley, and there is no gap between adjacent ribs in the trough. It is characterized by becoming a state.

Further, an endless annular belt is wound around a plurality of pulleys to form troughs between the pulleys, and the object to be cleaned put in the trough is rolled while being rotated by the rotation of the endless annular belt. In a shot blasting apparatus for projecting a material, a spiral body made of a ribbon-like screw blade having no central axis is placed in a trough, and an object to be polished that rolls in the trough by an endless annular belt that rotates around the endless end The spiral blades rotating in synchronization with the annular belt are urged and sent in the discharge direction.
By adopting such a structure, it is possible to project the abrasive while rolling the object to be polished, and to automatically send out the object to be cleaned from the trough. Can be continuously processed. The endless annular belt can have a simple structure.

In addition, an input cylinder for introducing the material to be cleaned to one open end of the trough, and a discharge cylinder for introducing and discharging the object to be cleaned to the other open end of the trough are disposed, respectively. Is rotated at the same rotational speed as the endless annular belt.
By adopting such a configuration, the shape of the trough is fixed and stably held by the charging cylinder and the discharging cylinder that are in contact with the trough, and the object to be cleaned from the charging cylinder is charged and the object to be cleaned is discharged to the discharging cylinder. Can be discharged smoothly.

It is explanatory drawing which looked at the continuous shot blasting apparatus of the 1st Embodiment of this invention from the front. It is explanatory drawing which looked at the continuous shot blasting apparatus of the 1st Embodiment of this invention from the side. It is explanatory drawing which looked at the continuous shot blasting apparatus of the 1st Embodiment of this invention from upper direction. It is explanatory drawing of the spiral in the continuous shot blasting apparatus of the 2nd Embodiment of this invention. It is explanatory drawing which looked at the continuous shot blasting apparatus of the 2nd Embodiment of this invention from the side. It is explanatory drawing which looked at the continuous shot blasting apparatus of the 2nd Embodiment of this invention from upper direction.

  Hereinafter, an embodiment for carrying out a continuous shot blasting apparatus according to the present invention will be described in detail with reference to the drawings. 1 to 6 are diagrams illustrating embodiments of the present invention. In these drawings, the same reference numerals denote the same components, and the basic configuration and operation are the same. To do.

<First embodiment>
<Configuration>
1 to 3 show a first embodiment of a continuous shot blasting apparatus according to the present invention.
As shown in FIG. 1, an endless annular belt 1 made of a flexible wide rubber belt or the like is wound around three pulleys 2, 3, 4 (at least one of which is a rotation driving means). Then, the endless annular belt 1 hangs down between the two upper pulleys 2 and 3, and a groove-like trough 5 is formed there.

As shown in FIGS. 2 and 3, at both ends of the trough 5, there are an input cylinder 6 for introducing the material to be polished W into the trough 5, and a discharge cylinder 7 for discharging the object to be cleaned W from the trough 5. The input cylinder 6 and the discharge cylinder 7 are rotated in synchronization with the circumferential rotation speed of the endless annular belt 1.
On the surface of the endless annular belt 1, guide ribs 8 having a width of about 20 mm and a height of about 50 mm are provided so as to project in a spiral shape (double spiral in this embodiment). The guide rib 8 has an action of partitioning the trough 5 in the vertical direction in order to sharpen the relatively large-diameter object W to be cleaned one by one, and the object W in the trough 5 from the charging cylinder 6. It has the effect of being urged and conveyed toward the discharge cylinder 7. Moreover, the guide rib 8 also exhibits the effect | action which prevents that the projected abrasive is scattered around.
The guide rib 8 is formed by connecting a large number of ribs each having a trapezoidal shape in a straight line. When the guide rib 8 is wound around the pulleys 2, 3 and 4, as shown in FIG. The V-shaped gap is opened, and the trough 5 is in a close state with no gap between adjacent ribs. In this state, the concave shape of the guide rib 8 is stably maintained, and the trough 5 can stably maintain a semicircular arc shape. The angle of the V-shaped gap depends on the curvature of the trough 5 to be set, and the diameter of the trough 5 increases as the angle of the V-shaped gap decreases.

<Operation>
The object to be cleaned W is thrown into the trough 5 through the throwing cylinder 6, put one by one between the guide ribs 8 formed in a partition shape on the endless annular belt 1, and rolls by the endless annular belt 1 rotating around. On the other hand, the abrasive is uniformly projected from the abrasive material projector 9 positioned above the trough 5 while being pushed and urged by the spiral guide rib 8 and moving in the direction of the discharge cylinder 7. The to-be-scoured object W is pushed and urged by the guide rib 8 and enters the discharge cylinder 7 and is transported to the next process.
Then, at the timing when the object to be polished W in the trough 5 moves from the tip of the charging cylinder 6 and the rear thereof is partitioned by the guide rib 8, the next object to be polished W is charged from the charging cylinder 6 into the trough 5. Is done.
The abrasive material projected from the abrasive material projecting machine 9 onto the trough 5 is recovered by dropping it below the belt by means such as making a number of small holes in the endless annular belt 1.
As described above, since there is no obstacle that repels the abrasive material between the abrasive projection machine 9 and the workpiece W, the workpiece W can be efficiently polished. In addition, it is possible to automatically process the loading / scouring / discharging processes without the need for manpower while reliably rolling a relatively large object to be polished.

<Second embodiment>
<Configuration>
4 to 6 show a second embodiment of the continuous shot blasting apparatus of the present invention.
In the continuous shot blasting apparatus of this embodiment, instead of the spiral guide rib in the first embodiment described above, as shown in FIG. 4, a spiral body 11 made of ribbon-shaped screw blades having no central axis is provided. Place in the trough 5.
The spiral body 11 is made of iron or the like having rigidity. As an example, the spiral body 11 has a diameter of about 300 mm according to the inner diameter of the trough 5, the blade 11a has a width diameter of about 50 mm, and the spiral pitch is the size of the member to be cleaned. It will be set appropriately according to the situation.
Then, as shown in FIG. 5, the outer periphery of the spiral body 11 is positioned in close contact with the trough 5 without any gap, and rotates in synchronization with the endless annular belt 1. The spiral body 11 is rotated passively by contacting the outer periphery of the spiral body 11 with the endless annular belt 1 or connected to the leading end of the input cylinder 6 and / or the discharge cylinder 7 to rotate integrally.

<Operation>
The object W to be studied is thrown into the trough 5 through the throwing cylinder 6 and fits in the valley of the spiral body 11. The abrasive material is uniformly distributed from the abrasive material projector 9 located above the trough 5 while being rolled by the circumferentially rotating endless annular belt 1 and being pushed and urged by the helical body 11 to move toward the discharge cylinder 7. Projected. The to-be-polished object W is pushed and urged by the spiral body 11, enters the discharge cylinder 7, and is conveyed to the next process.
Then, at the timing when the object to be polished W in the trough 5 moves from the tip of the charging cylinder 6 and the rear thereof is partitioned by the spiral body 11, the next object to be polished W is charged from the charging cylinder 6 into the trough 5 Is done.
As described above, since there is no obstacle that repels the abrasive material between the abrasive projection machine 9 and the workpiece W, the workpiece W can be efficiently polished. In addition, it is possible to automatically process the loading / scouring / discharging processes without the need for manpower while reliably rolling a relatively large object to be polished.
The conveyance speed of the object to be polished in the first embodiment and the second embodiment described above is determined by the circumferential rotation speed of the endless annular belt, the inclination angle of the guide rib, the pitch of the helix in the helical body, and the like. Is set as appropriate according to the polishing time of the object to be polished.

  The continuous shot blasting apparatus of the present invention can be used in the processing industry for polishing a workpiece such as metal.

DESCRIPTION OF SYMBOLS 1 ... Endless annular belt 2, 3, 4 ... Pulley 5 ... Trough 6 ... Input cylinder 7 ... Discharge cylinder 8 ... Guide rib 9 ... Abrasive material projector 11 ... Spiral body W ...

Claims (4)

An endless annular belt is wound around a plurality of pulleys to form a trough having a concave groove between the pulleys, and an abrasive material is rolled while rolling the object to be cleaned put in the trough by the rotation of the endless annular belt. In the shot blasting device that projects,
A guide rib of a ridge is spirally formed on the surface of the endless annular belt, and the guide rib pushes and biases the object to be swollen in the trough by the endless annular belt rotating around the endless belt. A continuous shot blasting device.   The guide rib is formed by connecting trapezoidal ribs in a straight line, and a gap between adjacent ribs is opened when wound on a pulley, and there is no gap between adjacent ribs in the trough. The continuous shot blasting apparatus according to claim 1, wherein An endless annular belt is wound around a plurality of pulleys to form a trough having a concave groove between the pulleys, and an abrasive material is rolled while rolling the object to be cleaned put in the trough by the rotation of the endless annular belt. In the shot blasting device that projects,
A spiral body composed of ribbon-shaped screw blades having no central axis is placed in the trough, and the object to be swollen in the trough is rotated in synchronization with the endless annular belt by the endless annular belt rotating around the circumference. A continuous shot blasting apparatus characterized in that the spiral blades are urged and sent in the discharge direction.   An inlet cylinder for introducing the material to be cleaned is disposed at one opening end of the trough, and an exhaust cylinder for introducing and discharging the object to be cleaned is disposed at the other opening end of the trough. The continuous shot blasting device according to any one of claims 1 to 3, wherein the continuous shot blasting device is rotated at the same peripheral rotation speed as the annular belt.