WO2012117783A1

WO2012117783A1 - Blasting material separation device and shot processing apparatus

Info

Publication number: WO2012117783A1
Application number: PCT/JP2012/051838
Authority: WO
Inventors: 万俊山本
Original assignee: 新東工業株式会社
Priority date: 2011-03-01
Filing date: 2012-01-27
Publication date: 2012-09-07
Also published as: CN103221181A; JP2014094413A; CN103221181B

Abstract

The purpose of the present invention is to provide a blasting material separation device etc. capable of efficiently separating a blasting material and a foreign material, which is heavy and has a diameter greater than that of the blasting material, but smaller than the diameter of the holes in a rotary screen positioned upstream from a wind-selection-type separator or the diameter of the openings of a sieve. This blasting material separation device for a shot processing apparatus is characterized by being provided with: a first cylindrical sieve means, which is positioned on a transport path for a mixture of blasting material that has been blasted at a workpiece and the product resulting from blasting with the blasting material, and in which multiple first holes are formed, said first holes having dimensions that allow the blasting material to pass through; a feed mechanism, which feeds the mixture to a space inside the first cylindrical sieve means; a first driving mechanism, which rotationally drives the first cylindrical sieve means around an axis in the longitudinal direction; and a second cylindrical sieve means, in which multiple second holes are formed, said second holes having dimensions that allow the blasting material to pass through and are smaller than the diameter of the first holes, and which has a cylindrical form with a larger diameter than the first cylindrical sieve means, and which is positioned outside of the first cylindrical sieve means.

Description

Projected material sorting device and shot processing device

The present invention relates to a projectile sorting apparatus and a shot processing apparatus, and more particularly, to a projectile sorting apparatus for sorting projectiles from a mixture of a projectile projected on a work and a product by projection, and such a sorting apparatus The present invention relates to a shot processing apparatus.

In a shot processing apparatus that projects a projection material onto a workpiece to perform shot processing, the projection material that has been projected is collected and reused from the viewpoint of cost reduction, resource saving, and the like. In such recovery, it is necessary to separate (separate) reusable projectiles and foreign matter generated by the projection. As an apparatus for separating projection material and foreign matter, an apparatus for separating a projection material and foreign matter by combining a wind separation type separator and a vibrating screen is known (Japanese Patent Publication No. 7-35020).

However, the mixture of the projectile of the magnetic substance projected onto the work and the product by the projection contains fine particles, but also contains relatively large-sized lumps. In some cases, it is not possible to accurately separate materials and foreign matter.

In detail, when the projection material and the foreign matter have substantially the same size, the projection material is heavy, and the foreign matter is light, the projection material and the foreign matter can be separated by weight classification using a wind selective separator. However, when a large size and heavy foreign matter is mixed in, separation by weight classification using a wind separation type separator becomes difficult, and in some cases the projection material and the foreign matter can not be separated with high accuracy.

For this reason, a rotary screen or sieve provided with a hole having a diameter larger than the diameter of the projection material is disposed on the upstream side of the wind selective separator, and large foreign matter having a large size is removed. It is also conceivable to separate materials.

However, in such a configuration, if a large amount of foreign matter having a diameter larger than the diameter of the projection material but smaller than the diameter of the hole of the rotary screen and having a large weight is mixed in the mixture, the foreign matter is It will not be removed, but will be sent to the wind selective separator with the projectile.

In the wind selective separator, it is difficult to separate such a large weight foreign object from the projection material, and it is difficult to accurately separate such a large weight foreign object and the projection material even in the above configuration. Become.

The present invention efficiently separates foreign matter from the projection material, which has a large weight and a diameter larger than that of the projection material but smaller than the diameter of the hole of the rotary screen disposed on the upstream side of the wind selective separator and the opening diameter of the sieve. It is an object of the present invention to provide a shot material sorting apparatus that can perform the shot material processing and the shot processing apparatus provided with such a sorting apparatus.

According to another preferred aspect of the invention:
A projection material sorting device for a shot processing device, comprising
A first tubular member disposed in a conveyance path of a mixture of a projection material projected on a work and a product of the projection material and having a plurality of first holes of a size through which the projection material can pass Sieve means,
A supply mechanism for supplying the mixture to the internal space of the first cylindrical sieve means;
A first drive mechanism for rotationally driving the first cylindrical sieve means about a longitudinal axis;
A plurality of second holes smaller than the diameter of the first hole and sized to allow the projection material to pass therethrough are formed, and the first cylindrical sieve means has a cylindrical shape larger in diameter than the first cylindrical sieve means. And second cylindrical sieve means disposed outward of the cylindrical sieve means,
There is provided a projection material sorting apparatus characterized in that.

According to such a configuration, the first cylindrical sieve means removes foreign matter having a large size contained in the shot material and the like, and the shot material and the like from which lumps having this large size have been removed are the first sieve means and It is supplied to the space between the second sieve means. Then, by the second cylindrical sieve means, the foreign matter of intermediate size is removed.
As described above, since only the projection material and the like not containing large size chunks is supplied to the space between the first screening means and the second screening means, for example, between the large size foreign matters. It is possible to prevent or suppress the situation where the projection material is pinched and the projection material is removed together with the large foreign matter, and the sorting is efficiently performed in the second sieve portion.

According to another preferred aspect of the invention:
The second cylindrical sieve means is connected to the first cylindrical sieve means, and is rotationally driven integrally with the first cylindrical sieve means.
According to such a configuration, it is possible to rotate the two cylindrical sieve means with a simple configuration to efficiently separate the projectiles.

According to another preferred aspect of the invention:
The first cylindrical sieve means and the second cylindrical sieve means have a cylindrical shape and are arranged concentrically.

According to another preferred aspect of the invention:
A first screw lead disposed inside the first cylindrical sieve means is provided.
According to such a configuration, it is possible to efficiently separate the projection materials while conveying the projection materials and the like in the first cylindrical sieve means.

According to another preferred aspect of the invention:
The first screw lead is attached to the inner circumferential surface of the first cylindrical sieve means.
According to such a configuration, it is possible to transport the projection material and the like in the first cylindrical sieve means with a simple configuration, and to efficiently separate the projection materials.

According to another preferred aspect of the invention:
And a second screw lead disposed in a space between the first cylindrical sieve means and the second cylindrical sieve means.
According to such a configuration, it is possible to efficiently sort out the projection material in the space in the first cylindrical sieve means and the second cylindrical sieve means while conveying the projection material and the like.

According to another preferred aspect of the invention:
The second screw lead is attached to the inner circumferential surface of the second cylindrical sieve means.

According to such a configuration, the projection material can be efficiently separated in the space in the first cylindrical sieve means and the second cylindrical sieve means while conveying the projection material etc. with a simple constitution. It can be carried out.

According to another preferred aspect of the invention:
The work is a round bar-like electrode bar.

According to another preferred aspect of the invention:
The first cylindrical sieve means is constituted by a punching pipe in which a punching metal is formed in a cylindrical shape, and the first cylindrical sieve means is constituted by a mesh cylinder in which a net-like body is cylindrically formed. .

According to another preferred aspect of the invention:
The first cylindrical sieve means and the second cylindrical sieve means are constituted by a mesh cylinder in which a mesh body is cylindrical.

According to another aspect of the invention,
A shot processing device that projects a projection material onto a workpiece,
A transfer device for transferring the work;
A projector for projecting a projection material onto the workpiece;
A first cylinder disposed in a conveyance path of a mixture of a projection material projected on the work and a product of the projection material and having a plurality of first holes of a size through which the projection material can pass. Sieve means,
A supply mechanism for supplying the mixture to the internal space of the first cylindrical sieve means;
A first drive mechanism for rotationally driving the first cylindrical sieve means about a longitudinal axis;
A plurality of second holes of a size smaller than the diameter of the first hole and through which the projection material can pass are formed in a plurality, and a cylindrical form having a diameter larger than that of the first cylindrical sieve means is formed. And second cylindrical sieve means disposed outward of the first cylindrical sieve means,
There is provided a shot processing apparatus characterized in that.

According to the present invention, there is provided a projection material sorting apparatus capable of efficiently sorting a foreign material having a large weight and a shot material, and a shot processing apparatus provided with such a sorting apparatus.

It is a front view which shows the shot blasting apparatus of one Embodiment of this invention. It is a right side view showing the shot blasting device of one embodiment of the present invention. It is a top view which shows the shot blasting apparatus which concerns on one Embodiment of this invention. It is a longitudinal cross-sectional view of the rotary screen part of the shot blasting apparatus of FIG. It is a rear view of the rotary screen part of the shot blasting apparatus of FIG. It is a longitudinal cross-sectional view of the rotary screen part of the shot blasting apparatus of FIG. It is a perspective view which shows the structure of the piece for 2nd sieves used for the rotary screen of the shot blasting apparatus of FIG. It is a typical longitudinal cross-sectional view which shows the structure of the wind selective separator used with the shot blasting apparatus of FIG.

Hereinafter, with reference to the drawings, a shot blasting apparatus 10 provided with a projection material sorting apparatus for a shot processing apparatus according to a preferred embodiment of the present invention will be described. In the drawings, the arrow FR indicates the front side of the apparatus front view, the arrow UP indicates the apparatus upper side, and the arrow LH indicates the left side of the apparatus front view.

FIG. 1 is a front view of the shot blasting apparatus 10, FIG. 2 is a right side view of the shot blasting apparatus 10, and FIG. 3 is a plan view of the shot blasting apparatus 10.
In the shot blasting apparatus 10 of the present embodiment, the work 12 is a round bar-like electrode rod. The electrode rod of the work 12 contains an impurity made of a nonmagnetic material on the surface side. Moreover, the arrow X suitably shown in the figure has shown the conveyance direction by which the workpiece | work 12 is conveyed.

As shown in FIG. 1, the shot blasting apparatus 10 includes a cabinet 14. The cabinet 14 is provided at an upstream position (left side in FIG. 1) in the transport direction of the work 12 and is formed at the downstream side position (right side in FIG. 1) of the transport direction of the work 12 And an outlet 14C from which the 12 is carried out.

The lift door 20 is provided in each of the loading port 14B and the unloading port 14C. The lift door 20 is structured to be lifted and lowered in the apparatus vertical direction by the cylinder mechanism 21, and is controlled to be lifted and opened only when the work 12 passes.

A seal 22 is attached to the lower end of the lift door 20. The seal body 22 is a so-called rubber warmer which is made of a plurality of elongated members having elasticity and flexibility, and when the work 12 passes through, the seal body 22 comes in contact with the work 12 and the transfer direction downstream side of the work 12 It is set to bend. Therefore, when the workpiece 12 passes through the inlet 14B and the outlet 14C, the space between the workpiece 12 and the periphery of the inlet 14B and the outlet 14C is sealed by the seal 22 and the cavity 14 is subjected to the shot process. It is suppressed that a projection material flies out from the inside through the inlet 14B and the outlet 14C.

Inside the cabinet 14, a roller conveyor 16 for conveying the work 12 is provided. The roller conveyor 16 includes a plurality of conveyor rollers 16A on which the work 12 is loaded, and a drive mechanism (not shown) for rotationally driving the conveyor rollers 16A.
The plurality of conveyor rollers 16A are disposed at predetermined intervals along the transport path of the work 12.

As shown in FIG. 3, each conveyor roller 16A has a so-called drum shape in which the diameter gradually decreases from both ends in the axial direction toward the central side and the central portion in the axial direction is narrowed. Each conveyor roller 16A is oriented so that its rotational axis extends in the horizontal direction, is inclined with respect to the transport direction, and is parallel to each other. Furthermore, the conveyor roller 16A is configured to rotate at the same speed simultaneously by the drive mechanism.

As shown in FIG. 1, a projection chamber 14A is formed in the cabinet 14. In the projection chamber 14A, the projection material is projected onto the workpiece 12 and the workpiece 12 is subjected to a blast process. As shown in FIG. 3, four projectors 18 are mounted on the upper side of the transfer path of the work 12. The projector 18 is a centrifugal type projector, and is a centrifugal type projector. The projection material (shot) accelerated by the rotation of the impeller (impeller) is transferred to the workpiece 12 transported in the projection chamber 14A. Projected In the present embodiment, a steel ball is used as the projection material.
The diameter of the steel ball is preferably, for example, about 1.0 to 2.0 mm, and in the present embodiment, a steel ball having a diameter of 1.2 mm or 1.7 mm is used.

On the other hand, the introduction pipe 24 is connected to the projection machine 18 from the upper side, and the upper end of the introduction pipe 24 is connected to the shot tank 28 for projection material storage via the flow rate adjusting device 26. As a result, the projector 18 is connected to the circulation device 30 via the introduction pipe 24, the flow rate adjustment device 26, and the shot tank 28.

The circulation device 30 is a device for collecting the projection material projected by the projection machine 18 and circulating it to the projection machine 18, and the hopper 32 is provided on the lower side of the roller conveyor 16 inside the cabinet 14. The hopper 32 is used for collecting the projection material. Below the hopper 32, a first screw conveyor 34 is provided.

As shown in FIG. 1, the first screw conveyor 34 is configured by two conveyors arranged in series along the conveyance direction of the work 12. Each of the two conveyors is configured to convey a mixture (such as a projection material) of a projection material and a foreign object (a product by projection) separated from the work 12 by projection to the central portion side in the left-right direction of the apparatus There is. A screw chute 36 is disposed below a longitudinal central portion of the first screw conveyor 34, and a second screw conveyor 38 is disposed below the screw chute 36.

As shown in FIG. 2, the second screw conveyor 38 is disposed inside the second screw conveyor case 37, and is horizontally disposed with the direction orthogonal to the conveyance direction of the work 12 as the longitudinal direction. As shown in FIG. 4, the second screw conveyor 38 includes a shaft 38A and screw leads 38B formed on the outer periphery of the shaft 38A.

The shaft 38A of the second screw conveyor 38 protrudes to the outside of the second screw conveyor case 37, and is connected to the drive motor 44 via the drive power transmission unit 45. The second screw conveyor 38 can be rotationally driven about the shaft 38A, and supplies projectiles and the like introduced from the first screw conveyor 34 via the screw chute 36 to the rear side of the device (right side in FIG. 4) Is configured.

On the downstream side of the second screw conveyor 38 in the transport direction, a rotary screen 40 functioning as a rotary sieve is provided. As shown in FIG. 2, the rotary screen 40 is disposed at the lower part of the shot blasting apparatus 10 together with the second screw conveyor 38.

As shown in FIG. 4, a shaft extension 42, which is an extension of the shaft 38 </ b> A of the second screw conveyor 38, passes through the inside of the rotary screen 40. The shaft extension 42 extends outward through the side wall 46 A of the rotary screen case 46, the tip of which covers the rotary screen 40. A shaft extension 42 projecting outward from the rotary screen case 46 is sealed between the side wall 46A of the rotary screen case 46 and the seal body 47, and a tip end portion is rotatably supported by a bearing 48. .

The rotary screen 40 is provided with a cylindrical first sieve portion 50 disposed concentrically with the shaft extension portion 42. The inner diameter of the first sieve unit 50 is larger than the outer diameter of the second screw conveyor case 37, and the end of the second screw conveyor case 37 is concentric inside the end on the second screw conveyor 38 side. Is located in

As described above, the first sieve unit 50 is provided in the conveyance path of the mixture (projectile material etc.) of the projectile and the product by the projection, and the projection material etc. is provided inside the first sieve unit 50 as the second screw. It will be supplied by the conveyor 38.

The shaft extension portion 42 is connected to the first sieve portion 50 via a connection portion 52 provided close to the second screw conveyor 38. The connecting portion 52 includes a boss 52 </ b> A fixed to the shaft extension 42. The boss 52A has a substantially cylindrical shape, and the shaft extension 42 passes through the central space.

A plurality of brackets 52B are attached to the outer periphery of the boss 52A. The bracket 52B extends outward in the radial direction of the first sieve portion 50 from the boss 52A, and the tip end of the bracket 52B is in contact with the inner circumferential surface of the first sieve portion 50. The front end portion of the bracket 52B is connected to the first sieve portion 50 via an angle 52C having an L-shaped cross section.

The connecting portion 54 provided on the distal end side of the shaft extension portion 42 also has a boss 54A. The boss 54A has a substantially cylindrical shape, and penetrates the central space in a state where the shaft extension 42 is fixed to the inner circumferential surface of the cylinder of the boss 54A.
The boss 54A is formed with a bolt insertion hole extending in the radial direction, and the bolt 54B is inserted through the insertion hole. The boss 54A is fixed to the shaft extension 42 by pressing the tip of the bolt 54B against the shaft extension 42. Thus, the axially fixed position of the boss 54A with respect to the shaft extension 42 can be changed by loosening the bolt 54B.

A plurality of brackets 54C are attached to the outer peripheral side of the boss 54A. The bracket 54C extends radially outward of the first sieve portion 50 from the boss 54A, and the tip thereof abuts on the inner circumferential surface of the first sieve portion 50. The front end of the bracket 54C is connected to the first sieve unit 50 via an angle 54D having an L-shaped cross section.
Further, in the present embodiment, as shown in FIG. 6, four brackets 54C are provided at intervals of 90 degrees in the circumferential direction, as shown in FIG. Are arranged in a cruciform shape.

With such a configuration, the shaft extension portion 42 and the first sieve portion 50 are connected, and when the shaft extension portion 42 is rotated by the drive motor 44, the first sieve portion 50 is rotationally driven about its longitudinal axis. .

The first sieve portion 50 is made of a punching pipe in which a punching metal is formed in a tubular shape, and a plurality of first hole portions 50A are formed over substantially the entire surface. The first hole 50A is set to have a diameter a larger than the diameter of the projection material, that is, a dimension through which the projection material can pass.
In this embodiment, a punching pipe is used in which circular holes having a diameter of 8 mm are made of punching metal arranged in a staggered manner.

In addition, it replaces with punching metal and a mesh cylinder (for example, a plain weave metal wire mesh with an open diameter of 6 mm with a wire diameter of 2.2 mm, or a plain woven wire mesh with an open diameter of 7 mm with a wire diameter of 3 mm, etc.) The body may constitute the first sieve section.

On the inner peripheral surface of the first sieve unit 50, a first screw lead 56 for conveying the projectile or the like to one side (right direction in the drawing) of the first sieve unit 50 in the axial direction is provided. The first screw lead 56 is formed of an elongated portion, and is disposed spirally on the inner circumferential surface of the first sieve portion 50.
In addition, in FIG. 6, the 1st screw lead 56 is typically shown with the dashed-two dotted line.

With such a configuration, it is possible to transport the projection material or the like while rolling in a predetermined direction (right direction in the drawing) inside the first sieve unit 50 by the rotation of the first sieve unit 50.

As shown in FIGS. 4 and 6, a cylindrical second sieve 60 is disposed concentrically with the shaft extension 42 and the first sieve 50 on the outer circumferential side of the first sieve 50. It is done. The second sieve unit 60 is connected to the first sieve unit 50 by the connecting unit 62 and is rotationally driven integrally with the first sieve unit 50.

In the space between the first sieve unit 50 and the second sieve unit 60, a portion of the projection material supplied from the first sieve unit 50 that has passed through the first hole 50A of the first sieve unit 50 ( Component) is supplied.

The second sieve unit 60 is a cylindrical cylinder provided with the net-like body 70. In the mesh body 70, a plurality of second holes 70A are formed. The second hole 70A is set to a diameter b that is smaller than the diameter a of the first hole 50A and larger than the diameter of the projection material (that is, the projection material can pass through).
In the present embodiment, a plain woven metal wire mesh having a wire diameter of 0.9 mm and an opening of 3.6 mm is used as the mesh body 70, so the second hole 70A is a square hole having a side of 3.6 mm. .
In addition, in FIG. 4 and FIG. 6 except an enlarged view, the mesh-like body 70 of the 1st sieve part 50 is typically shown with the dashed-two dotted line.

The second sieve portion 60 is configured by connecting in the axial direction two cylindrical blocks in which four arc-shaped second sieve pieces 64 shown in FIG. 7 are connected in the circumferential direction. ing.

As shown in FIG. 7, the second sieve piece 64 comprises a field-shaped frame 66. That is, the frame 66 includes a pair of frame arc portions 68A disposed opposite to each other, a pair of frame straight portions 68B connecting both ends of the frame arc portions 68A in the arc direction, and the frame arc portions 68A. And a cross-shaped portion 68C disposed in a rectangular frame formed by the frame linear portion 68B.

In the present embodiment, a net-like body 70 made of plain woven wire mesh having a wire diameter of 0.9 mm and an open diameter of 3.6 mm is formed on a rice-shaped frame 66 to form an arc surface in a state where tension is applied. It is attached to the frame 66.

Screw holes 66a having a diameter of 8 mm are provided at ten places in the frame arc portion 68A and the frame linear portion 68B which constitute the outer edge of the rice-shaped frame 66. The second screening piece 64 is bolted to the frame of the rotary screen using the screw holes 66a.

As shown in FIG. 6, flange portions 69 extending outward in the radial direction of the rotary screen 40 are formed on both end portions in the circumferential direction of the frame 66. The second sieve pieces 64 adjacent to each other in the circumferential direction of the second sieve portion 60 are coupled by connecting the opposing flange portions 69 with each other by a fastener (not shown).

Furthermore, a plate 62A in which the base end portion is fixed to the outer peripheral surface of the first sieve unit 50 is provided, and constitutes a connecting unit 62 for connecting the second sieve unit 60 and the first sieve unit 50. As shown in FIG. 4, the plate 62 </ b> A extends in the axial direction of the rotary screen 40 on the outer circumferential surface of the first sieve portion 50 and extends radially outward of the rotary screen 40.
Tab-like overhangs extend from both longitudinal ends and the central portion of the plate 62A, and the tips of the overhangs are sandwiched between the flanges 69 of the frame 66.

On the other hand, an arc member 72 having an L-shaped cross section is fixed on the outer peripheral side of both axial ends of the second sieve portion 60 of the frame 66. The arc member 72 is disposed along the frame arc portion 68A. In addition, in FIG. 6, the attachment part to the flame | frame arc part 68A of the circular arc member 72 is not shown in figure. As shown in FIG. 4, in the second sieve portion 60, the axially adjacent arc members 72 are abutted and connected by a fastener (not shown).

Further, a second screw lead 74 is attached to the inside of the second sieve portion 60. The second screw lead 74 is helically attached to the inner circumferential surface of the second sieve portion 60. The second screw lead 74 rotates integrally with the second sieve unit 60, and passes through the first sieve unit 50 and is supplied to the space between the first sieve unit 50 and the second sieve unit 60. Is conveyed to one side in the axial direction (rightward in the drawing). At this time, only a projection material or the like having a diameter smaller than that of the second hole 70A falls from the second sieve portion 60, and foreign matter having a diameter larger than that of the second hole 70A is separated from the projection material or the like. In FIG. 6, the second screw lead 74 is schematically shown by a two-dot chain line.

The end on the downstream side of the first sieving portion 50 and the second sieving portion 60 in the transport direction faces the side wall 46A of the rotary screen case 46, and a rough exit hole 46B is formed in the lower portion of the side wall 46A. ing. Below the rough exit hole 46B, a chute 76 inclined downward is provided.

The chute 76 is supplied with a large sized foreign particle that did not pass through the first hole 50A of the first sieve unit 50 and a medium sized foreign particle that did not pass through the second hole 70A of the second sieve unit 60. These foreign matter are discharged. In addition, the foreign material to be discharged is an impurity (breeze) made of a nonmagnetic material, most of which are dropped from the electrode bar of the work 12.

On the downstream side of the chute 76, a roughing case 78 is disposed. A dish-shaped receiving portion 78A (breathe receiving) is provided in the rough delivery case 78, and the receiving portion 78A receives the foreign matter supplied from the chute 76.

A magnet separator (magnetic separator) 80 is disposed below the roughing case 78. The magnet separator 80 is provided with a magnet (magnet), and separates powder particles adsorbed by the magnetic force and powder particles not adsorbed by the magnetic force. Below the magnet separator 80, a first discharge chute 82A (iron powder discharge chute) for discharging powder particles adsorbed by magnetic force, and a second discharge chute for discharging powder particles not adsorbed by magnetic force. 82B (breathe discharge chute) is provided. The particulate matter discharged from the first discharge chute 82A and the second discharge chute 82B is discarded.

Below the rotary screen 40, a rotary screen chute 84 is provided. The lower end of the rotary screen chute 84 is disposed at a position facing the lower collecting portion of the first bucket elevator 86 (bucket elevator).

The first bucket elevator 86 is attached to pulleys 86A disposed at the upper and lower portions of the shot blasting apparatus 10, an endless belt 86B wound around the pulley 86A, and an endless belt 86B, as shown in FIG. And a number of buckets (not shown).

The pulley 86A is rotationally driven by a motor 87. By this rotational drive, the first bucket elevator 86 scoops up with a bucket such as a projection material poured from the rotary screen chute 84, and transports the projection material and the like in the bucket from the lower side to the upper side of the device.

An upper discharge port of the first bucket elevator 86 communicates with a wind selective separator 88 as a wind power sorting mechanism.

FIG. 8 is a view showing the structure of the wind selective separator 88. As shown in FIG. In the following description, the direction perpendicular to the sheet of FIG. 8 is referred to as the separator width direction. As shown in FIG. 8, the wind selective separator 88 includes a settling chamber portion 96 communicating with the suction side of the dust collector 100. The dust collector 100 is provided with suction means (blower) for suctioning air, and is connected to the settling chamber 96 via a suction duct 98 (separator duct).

The air flow upstream side of the settling chamber portion 96 is in communication with the opposite air flow selection portion 92 extending in the vertical direction via the connection piping portion 94. Further, the opposing air flow selecting portion 92 is provided with a supply portion 90 for supplying, to the opposing air flow selecting portion 92, the projection material and the like carried out from the upper outlet port 86C of the first bucket elevator 86.

In the supply unit 90, a mesh-shaped screen 90A is horizontally stretched so as to constitute an upper and lower space. The mesh roughness of the screen 90A is set to a size that allows the projection material and the like to pass through.

On the lower side of the screen 90A of the supply unit 90, a first inclined wall 90B is formed. The first inclined wall portion 90B is inclined downward to the side opposite to the opposite air flow selection portion 92 to narrow the opening area. Further, a second inclined wall portion 90C is formed extending from near the facing position of the lower end portion of the first inclined wall portion 90B to the lower side of the first inclined wall portion 90B. The second inclined wall portion 90C is inclined in the opposite direction to the first inclined wall portion 90B. Further, from the lower end of the second inclined wall portion 90C, a horizontal portion 90D disposed substantially horizontally toward the opposing air flow selection portion 92 is formed.

A swing plate 90 </ b> G is disposed at the boundary between the supply unit 90 and the opposing wind selection unit 92. The swing plate 90G has an inverted T shape in a direction view of FIG. 7 and extends in the separator width direction (direction perpendicular to the sheet of FIG. 7). The upper end portion of the swing plate 90G is attached to a mounting plate 90E fixed to the housing of the wind selective separator 88 via a pin 90F, and can swing about the pin 90F.

The swing plate 90G is in the drooping posture to block (or narrow) the flow path in the state where the projection material or the like is not supplied, and in the state where the projection material or the like is supplied, the rotational movement is caused by the pressing force of the projection material or the like. Open (or widen) the road. Thereby, the swing plate 90G spreads the layer of the powdery particles (the mixture including the shot material) flowing out from the supply portion 90 to the opposing air flow selection portion 92 sufficiently in the width direction of the separator and makes it even.

A weight 90H is attached to the swing plate 90G so that the angle of the rotational displacement of the swing plate 90G with respect to the pressing force can be adjusted. Further, in the mounting plate 90E to which the swing plate 90G is attached, a long hole whose longitudinal direction is the vertical direction is formed for inserting a fastener, and the vertical position of the mounting plate 90E and the swing plate 90G can be adjusted. ing.

The opposing air flow selecting portion 92 includes an air passage 92A disposed with the vertical direction as the longitudinal direction, and the supply downstream side of the supply portion 90 is connected to the longitudinal intermediate portion of the opposing air flow selecting portion 92. The opposite wind selection unit 92 includes an inclined portion 92B formed continuously with the horizontal portion 90D of the supply unit 90. The inclined portion 92B is inclined downward so as to narrow the opening area of the air passage 92A. Further, a drooping portion 92C is suspended at a constant diameter continuously to the inclined portion 92B.

A plurality of dispersing rods 92G are delivered to the hanging portion 92C. The plurality of dispersing rods 92G are arranged at intervals, and serve as means for dispersing the supplied granular materials such as the shot material in the hanging portion 92C.

An enlarged diameter portion 92D is formed on the lower side of the hanging portion 92C. An air inlet 92H opening upward is formed at the upper end of the enlarged diameter portion 92D. For this reason, in a state where the suction means (not shown) of the dust collector 100 is activated, the outside air flows from the air inlet 92H to generate an upward air flow f1 passing through the drooping portion 92C. In addition, since the powder particles are dispersed by the above-described dispersion rod 92G, the air flow f1 flows substantially uniformly, and as a result, sorting (classification) of the powder particles by the air flow f1 is facilitated.

The lower side of the enlarged diameter portion 92D is a tapered cylindrical portion 92E. The tapered cylindrical portion 92E is gradually reduced in diameter continuously with the enlarged diameter portion 92D. A receiving portion 92I is disposed in the tapered cylindrical portion 92E. The receiving portion 92I is used to prevent abrasion of the projection material, and is configured to temporarily store the falling projection material and then supply it downward. A discharge port 92F is formed on the lower end side of the tapered cylindrical portion 92E, and leads to a path for recycling the projection material.

The opposing wind selection unit 92 allows the mixture containing the projectile to fall naturally and, at the same time, the lightweight material placed on the air flow f1 by applying the upward air flow f1 and the heavy material falling as shown by the arrow S1. And is configured to separate. More specifically, the opposing wind selection unit 92 sorts the low specific gravity foreign matter carried on the air flow f1 and the high specific gravity falling projectile.

The settling chamber portion 96 connected to the opposite air flow selection portion 92 via the connection piping portion 94 has a cylindrical upper portion 96A and a truncated cone with its lower portion 96B having a smaller diameter. It is formed in the shape of a circle. Further, the lower end portion of the settling chamber portion 96 is connected to the above-described roughing case 78 via the roughing pipe 102.

A guide plate 96C is disposed on the upper portion 96A of the settling chamber 96 so as to hang down from the upper wall side. The guide plate 96C guides the air containing powder particles sucked into the settling chamber 96 by suction of suction means (not shown) of the dust collector 100, and diverts the bypass flow f2 as classification flow to the air. It is configured to generate. That is, the settling chamber portion 96 is configured to separate particles in the sucked air by the bypass flow f2. More specifically, settling chamber portion 96 carries fine powder or the like having a lighter specific gravity among the sucked powder particles into the air flow and discharges it to dust collector 100 (see arrow S3), and sand having a heavier specific gravity or the like As shown by arrow S2, and is discharged to the roughing case 78 side through the roughing pipe 102.

On the other hand, the discharge port 92F of the opposing air flow selecting section 92 described above is connected to the pipe 104 for circulating the projection material. A chute 106 is disposed below the lower end of the pipe 104, and the lower end of the chute 106 is disposed at a position facing the lower collecting portion of the second bucket elevator 108. The second bucket elevator 108 has a known structure similar to that of the first bucket elevator 86 described above, so the detailed description will be omitted. The upper portion of the second bucket elevator 108 is in communication with the screw conveyor 112 via the chute 110.

The screw conveyor 112 is disposed horizontally with the conveying direction of the work 12 as the longitudinal direction, and conveys the projection material to the left side of the apparatus by rotating around an axis. The above-described shot tank 28 is disposed on the lower side of the screw conveyor 112, and the transported projection material is supplied to the shot tank 28. That is, the collected and sorted projection material is again supplied from the shot tank 28 to the projector 18 through the flow rate adjusting device 26 and the introduction pipe 24.

Next, the operation of the shot blasting apparatus 10 will be described.
The projection material projected onto the work 12 by the projection machine 18 passes through the hopper 32, the first screw conveyor 34, and the screw chute 36 together with foreign matter such as impurities (bleeds) removed from the work 12 and the second screw conveyor case It is poured into 37.

The mixture of projectile and foreign matter (projectile etc.) poured into the second screw conveyor case 37 is supplied by the second screw conveyor 38 to the inside of the cylindrical first sieve portion 50 of the rotating rotary screen 40. Ru.

In the first sieve unit 50, the projectile contained in the projectile or the like and the foreign matter having a diameter smaller than that of the first hole unit 50A pass through the first hole unit 50A of the first sieve unit 50. At this time, since the mixture is sent to one axial side (right side in the figure) of the first sieve unit 50 by the screw lead 56 on the inner peripheral surface side of the first sieve unit 50, the projection material and the like are efficiently transported. While being separated sequentially.

Since a punching pipe in which a punching metal is formed in a cylindrical shape is used for the first sieve unit 50, the first sieve unit may be used even if a large amount of projection material or the like is supplied to the inside of the first sieve unit 50. The projectiles and the like are sorted without the 50 being deformed.

The projectile or the like that has passed through the first hole 50A is supplied to the space between the first sieve unit 50 and the second sieve unit 60 that rotates integrally with the first sieve unit 50. The projectiles and the like supplied to the space between the first sieve unit 50 and the second sieve unit 60 are conveyed by a screw lead 74 provided on the inner peripheral surface side of the second sieve unit 60. During the transportation, the projection material and the foreign material having a diameter smaller than that of the second hole 70A pass through the second hole 70A of the second sieve 60 and fall.

Since only the mixture that has passed through the first hole 50A is supplied to the space between the first sieve 50 and the second sieve 60, for example, the projection material is held between the larger foreign particles It is possible to prevent or suppress a situation in which the material is removed together with a large foreign matter, and the sorting accuracy in the second sieve portion 60 is enhanced.

Since a mesh cylinder is used for the second sieve portion 60, more holes can be easily formed, and the cost of the apparatus can be reduced.

The foreign matter which has not passed through the first hole portion 50A of the first sieve portion 50 and the foreign matter which has not passed through the second hole portion 70A of the second sieve portion 60 passes through the chute 76 and the roughing case 78. The magnetic separator 80 (see FIG. 2) separates the particles into particles of magnetic material and particles of non-magnetic material and discards them.

The projection material etc. which passed the 1st hole 50A of the 1st sieve part 50, and the 2nd hole 70A of the 2nd sieve part 60 go to the lower part of the 1st bucket elevator 86 via the rotary screen chute 84 shown by FIG. It is poured and conveyed by the first bucket elevator 86 from the lower side to the upper side of the apparatus.

Here, since the first bucket elevator 86 is configured to transport only the mixture whose amount of foreign matter has been reduced and the amount thereof has been reduced, the rotary screen 40 does not have to increase the transport capacity of the first bucket elevator 86. Conveyance of the mixture is possible.

The mixture transported by the first bucket elevator 86 is supplied to the wind selective separator 88. As shown in FIG. 8, the wind selective separator 88 has a weight (bleze and fine powder) to be dropped on the air flow f1 by dropping the mixture spontaneously and applying an upward air flow f1 to the mixture. Sort it into things (useable projection materials). As described above, the upward air flow f1 is applied to the naturally falling mixture, so that sorting can be efficiently performed when the mixture contains a large amount of lightweight foreign matter.

The usable projection material dropped by the wind selective separator 88 (see arrow S1) is flowed to the shot tank 28 through the pipe 104, the chute 106, the second bucket elevator 108, the chute 110, and the screw conveyor 112. It is supplied to the projector 18 again through the flow control device 26 and the introduction pipe 24.

On the other hand, the lightweight materials (breeze and fine powder) put on the air stream by the wind selective separator 88 in FIG. 8 are sorted according to the specific gravity in the settling chamber 96. Foreign matter having a large specific gravity (bleed) flows to the magnet separator 80 through the roughing pipe 102 and the roughing case 78, and foreign matter having a small specific gravity (fine powder) flows to the dust collector 100 through the suction duct 98 together with air flow (air). .

As described above, according to the shot blasting apparatus 10 according to the present embodiment, the projection material and the foreign matter can be efficiently separated. As a result, the inclusion of foreign matter (bleed) in the recycled and reused projection material is effectively suppressed, compared to the case where foreign matter (bleed) is mixed to some extent in the circulated projection material, Projection efficiency can be improved.

In the above embodiment, on the inner circumferential surface side of the first sieve unit 50 and on the inner circumferential surface side of the second sieve unit 60, a mixture containing the shot material and the particulate foreign matter is an axis of the first sieve unit 50. Screw leads 56, 74 were provided to feed in one direction.
However, for example, the first sieve unit 50 and the second sieve unit 60 may be arranged without the screw leads 56 and 74 so that the axes thereof incline obliquely downward toward the downstream side.

Further, in the above embodiment, a punching pipe in which a punching metal is formed in a cylindrical shape is used as the first sieve portion 50, and a mesh cylinder formed in the cylindrical shape with the mesh body 70 in the second sieve portion 60. The body is in use.
However, for example, a punching pipe may be used for the second sieve section, and if a necessary strength can be secured, a mesh cylinder using a net-like body for the first sieve section may be used.

Moreover, in the said embodiment, although the 2nd sieve part 60 was comprised by the piece 64 grade | etc., Of the 2nd sieving divided | segmented into four in the circumferential direction shown by FIG. It may be constructed by stretching.

Further, in the above embodiment, the second sieve unit 60 is separate from the first sieve unit 50, is connected to the first sieve unit 50 by the connecting unit 62, and is rotationally driven integrally with the first sieve unit 50. However, for example, the second sieve unit may be configured to be rotationally driven integrally with the first sieve unit by integrally forming the second sieve unit and the first sieve unit.

Instead of the wind selective separator 88, for example, a wind selective type in which the mixture is allowed to fall naturally and an air flow substantially orthogonal to the falling direction is applied to the mixture to sort it into a lightweight object to be carried in the air flow and a falling heavy object. Other wind separators such as separators may be provided.

Further, in the above embodiment, the rotary screen 40 is provided at the lower side of the apparatus and disposed at a path position for supplying the mixture to the first bucket elevator 86. However, for example, when the carrying capacity of the bucket elevator is large The rotary screen (rotating screen) may be disposed at a path position where the mixture transported by the bucket elevator is supplied.

Moreover, in the said embodiment, although the workpiece | work 12 is made into the electrode stick, the workpiece | work may be other workpiece | works like rod-shaped members other than an electrode stick etc., for example.

Moreover, in the said embodiment, although the steel ball is used as a projection material for the shot blasting apparatus 10, the structure which uses the projection material of another magnetic body, or the projection material of a nonmagnetic body may be used.

Moreover, in the said embodiment, although the shot processing apparatus is set as the shot blasting apparatus 10, a shot processing apparatus may be applied to a shot peening apparatus, for example.

In addition, the said embodiment and the several modification mentioned above can be combined suitably and can be implemented.

Claims

A projection material sorting device for a shot processing device, comprising
A first tubular member disposed in a conveyance path of a mixture of a projection material projected on a work and a product of the projection material and having a plurality of first holes of a size through which the projection material can pass Sieve means,
A supply mechanism for supplying the mixture to the internal space of the first cylindrical sieve means;
A first drive mechanism for rotationally driving the first cylindrical sieve means about a longitudinal axis;
A plurality of second holes smaller than the diameter of the first hole and sized to allow the projection material to pass therethrough are formed, and the first cylindrical sieve means has a cylindrical shape larger in diameter than the first cylindrical sieve means. And second cylindrical sieve means disposed outward of the cylindrical sieve means,
A projection material sorting device characterized by
The second cylindrical sieve means is connected to the first cylindrical sieve means, and is rotationally driven integrally with the first cylindrical sieve means.
The projection material classification device according to claim 1.
The first cylindrical sieve means and the second cylindrical sieve means have a cylindrical shape and are arranged concentrically.
The projection material classification device according to claim 1 or 2.
A first screw lead disposed inside the first cylindrical sieve means,
The projection material classification device according to claim 1 or 2.
The first screw lead is attached to the inner circumferential surface of the first cylindrical sieve means.
The projection material classification device according to claim 4.
And a second screw lead disposed in a space between the first cylindrical sieve means and the second cylindrical sieve means.
The projection material classification device according to claim 3.
The second screw lead is attached to the inner circumferential surface of the second cylindrical sieve means.
The projection material classification device according to claim 6.
The work is a round bar electrode bar;
The projection material classification device according to claim 1 or 2.
The first cylindrical sieve means is constituted by a punching pipe in which a punching metal is formed in a cylindrical shape, and the first cylindrical sieve means is constituted by a mesh cylinder in which a net-like body is cylindrically formed. ,
The projection material classification device according to claim 1 or 2.
The first cylindrical sieve means and the second cylindrical sieve means are constituted by a mesh cylinder in which a mesh body is cylindrical.
The projection material classification device according to claim 1 or 2.
A shot processing device that projects a projection material onto a workpiece,
A transfer device for transferring the work;
A projector for projecting a projection material onto the workpiece;
A first cylinder disposed in a conveyance path of a mixture of a projection material projected on the work and a product of the projection material and having a plurality of first holes of a size through which the projection material can pass. Sieve means,
A supply mechanism for supplying the mixture to the internal space of the first cylindrical sieve means;
A first drive mechanism for rotationally driving the first cylindrical sieve means about a longitudinal axis;
A plurality of second holes of a size smaller than the diameter of the first hole and through which the projection material can pass are formed in a plurality, and a cylindrical form having a diameter larger than that of the first cylindrical sieve means is formed. And second cylindrical sieve means disposed outward of the first cylindrical sieve means,
A shot processing apparatus characterized in that.