JP2000006023A - Shotblast method and shotblast device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove the foreign matters on the full area on the surface of a work effectively by a shotblast. SOLUTION: To a bearing block 41 to move up and down by a motor 30 for elevation, a hollow revolution shaft 42 rotated by a motor 44 for revolution; and an autorotation shaft 43 rotated by a motor for autorotation (not illustrated), supported rotatable relatively at the inner side of the revolution shaft 42; are supported, and a hanger shaft 11 supported rotatable at the position eccentric from the revolution shaft 42, and the autorotation shaft 43, are connected by gears 55 and 56, inside a gear box 51 provided integrally at the lower end of the revolution shaft 42. The foreign matters of a work W supported to a work hanger 12 provided to the hanger shaft 11 are removed by shots projected from nozzles 14 and 15, during the time when the work W is autorotated, revolved, and moved up and down, in a cabinet 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a shot blasting method for projecting a shot onto a work to remove foreign matter adhering to the surface of the work, and a shot blasting apparatus for performing the method.

[0002]

2. Description of the Related Art A disc-shaped revolving plate which is rotated around a rotation axis by a revolving drive source, and a rotating body which is provided on the revolving plate so as to be eccentric from the rotary shaft and which rotates by the revolving drive source. Japanese Patent Application Laid-Open No. 63-119970 discloses a shot blasting apparatus which removes foreign matter by projecting a shot onto a workpiece suspended and supported by the rotating body.

[0003]

By the way, in the above-mentioned conventional apparatus, the work is revolved while rotating so that the shot can be uniformly projected on the surface of the work, but the impeller for projecting the shot is provided on the side of the work. Because of the arrangement, foreign matter on the upper and lower surfaces of the work is not effectively removed.

[0004] The present invention has been made in view of the above circumstances, and provides a shot blasting method capable of effectively removing foreign substances on the entire surface of a work, and a shot blasting apparatus for performing the method. With the goal.

[0005]

Means for Solving the Problems In order to achieve the above object, an invention according to claim 1 is directed to a shot blasting method for projecting a shot on a work to remove foreign matter attached to the surface of the work. A shot is projected while reciprocating a workpiece that revolves while rotating, along the axis of the revolving.

[0006] According to the above configuration, revolving while rotating,
In addition, since a shot is projected on a work that reciprocates along the axis of the revolution, it is possible to uniformly project the shot from various angles with respect to the work and effectively remove foreign matters attached to the surface of the work. it can.

According to a second aspect of the present invention, there is provided a shot blast apparatus for projecting a shot onto a work to remove foreign matter adhering to the surface of the work, a bearing block reciprocated by a reciprocating drive source, and a bearing. A hollow revolving shaft rotatably supported by the block and rotationally driven by the revolving drive source, and a revolving shaft rotatably supported by the revolving drive source and rotatably supported inside the revolving shaft,
A gear box that rotates integrally with the revolving shaft, a hanger shaft rotatably supported by the gear box at a position eccentric from the revolving shaft, a work hanger provided on the hanger shaft to support the work, and a gear box inside It is characterized by comprising connecting means for transmitting the rotation of the rotating shaft to the hanger shaft, which is housed, and a nozzle for projecting a shot on the work supported by the work hanger.

According to the above configuration, when the revolving shaft is driven by the revolving drive source to rotate the gear box integrated with the revolving shaft, the work hanger rotates around the revolving shaft together with the hanger shaft supported by the gear box. I do. When the rotation shaft is rotationally driven by the rotation driving source, the rotation is transmitted to the hanger shaft via connection means provided inside the gear box, and the work hanger rotates with the hanger shaft. When the bearing block is reciprocated by the reciprocating drive source, the work hanger reciprocates together with the hanger shaft supported by the bearing block via a gear box. Since the work hanger reciprocates while revolving and rotating in this manner, it is possible to uniformly project shots from various angles with respect to the work and to effectively remove foreign substances attached to the surface of the work.

According to a third aspect of the present invention, in addition to the configuration of the second aspect, the work hanger passes up and down between rollers of a roller conveyor for loading / unloading the work to transfer the work. It is characterized by performing.

According to the above configuration, the work hanger is moved up and down between the rollers of the roller conveyer, so that the work hanger can be moved up and down without using a special work transfer device by using a reciprocating drive source. Work transfer between the hanger and the roller conveyor can be performed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described based on embodiments of the present invention shown in the accompanying drawings.

1 to 5 show one embodiment of the present invention. FIG. 1 is an overall front view of a shot blasting apparatus, FIG. 2 is a sectional view taken along line 2-2 of FIG. 1, and FIG. 3-3 line sectional view,
4 is an enlarged view of a main part of FIG. 2, and FIG. 5 is a conceptual drawing of a shot blasting apparatus.

As shown in FIGS. 1 to 4, a roller conveyor C having a large number of rollers R for carrying in and out the work W is arranged below the shot blasting device. Although the work W is collectively shown in a box shape, in reality, parts such as gears are supported in multiple stages inside a metal basket through which shots made of steel grains can pass. Roller conveyor C
The annular guide rail 3 is disposed above the circular opening 2 ₁ formed in the ceiling wall 2 of the cabinet 1 facing the top, the rotary disk 5 through the slide guide 4 ... on the guide rail 3 It is rotatably supported. In the center below the rotary disk 5 through the cylindrical member 6 has a circular closure plate 7 is fixed coaxially, the closing plate 7 of the ceiling wall 2 opening 2 ₁
To be rotatable relative to. In order to prevent the shot pops out from the gap between the inner periphery of the opening 2 ₁ of the ceiling wall 2 and the outer peripheral portion of the closure plate 7, an annular baffle members 8 for closing the gap
Is provided.

A pair of guide rollers 9, 9 is provided at a position eccentric from the center of the upper surface of the closing plate 7, and a guide cylinder 10 supported up and down by the guide rollers 9, 9 penetrates the closing plate 7. And extend into the cabinet 1.
A work hanger 12 is provided at the lower end of a hanger shaft 11 which is rotatably fitted inside the guide tube 10 and in which two metal pipes bent in a square shape are juxtaposed. The lower periphery of the hanger shaft 11 protruding into the cabinet 1 is covered with a telescopic cover 13 that connects the lower end of the hanger shaft 11 and the lower surface of the closing plate 7. Two nozzles 14 and 15 are provided on a side wall of the cabinet 1 for projecting a shot with high-pressure air onto a work W supported on a work hanger 12. The upper nozzle 14 is disposed obliquely downward toward the workpiece W, and the lower nozzle 15
Are arranged obliquely upward toward the work W.

A pair of left and right guide rails 22 is provided on one side surface of a column 21 erected on the upper surface of the ceiling wall 2 of the cabinet 1.
22 is supported vertically. Guide rails 22, 22
A pair of right and left racks 2 extending in the vertical direction is provided on the back of a slide plate 24 supported via slide guides 23.
5, 25 are fixed. A pinion shaft 27 is rotatably supported at an intermediate portion of the column 21 in the vertical direction via bearings 26, 26, and driven sprockets 29, 29 fixed to the pinion shaft 27, and a lifting motor 30 provided on the column 21. Drive sprockets 31, 3 fixed to the output shaft of
1 are connected via endless chains 32, 32. A pair of left and right pinions 33, 33 are fixed to the pinion shaft 27, and these pinions 33, 33 mesh with the pair of left and right racks 25, 25, respectively.

A cylindrical revolving shaft 42 disposed vertically is rotatably supported on a bearing block 41 fixed to the slide plate 24 around an axis L. A revolving shaft 43 is provided inside the revolving shaft 42. Fit relatively freely rotatable. A revolving motor 44 and a revolving motor 45 are supported by the slide plate 24, and a driving gear 46 provided on an output shaft of the revolving motor 44 meshes with a driven gear 47 provided on the revolving shaft 42, and is used for rotation. The driving sprocket 48 provided on the output shaft of the motor 45 and the driven sprocket 4 provided on the rotation shaft 43
9 are connected by an endless chain 50. A gear box 51 is fixed to the lower end of the revolving shaft 42, and a spline shaft 52 fixed to the lower end of the gear box 51 and extending coaxially with the revolving shaft 42 is connected to a spline nut 53 provided at the upper end of the cylindrical member 6. Is slidably penetrated. Upper and lower ends of a telescopic boot 54 covering the outer periphery of the spline shaft 52 are connected to the gear box 51 and the cylindrical member 6.

The upper end of a hanger shaft 11 that supports the work hanger 12 at the lower end is rotatably supported by a gear box 51. First interlocking gear 55 provided at the lower end of rotation shaft 43
And the second interlocking gear 56 provided at the upper end of the hanger shaft 11 meshes inside the gear box 51. Hanger shaft 1
1 is eccentric with respect to the axis L of the revolution shaft 42 and the rotation shaft 43 by a distance α (see FIG. 4).

Next, the operation of the shot blasting apparatus having the above configuration will be described.

As shown by a chain line in FIG. 2, the work hanger 12 of the shot blasting apparatus is lowered in advance, and the work support surface thereof is positioned below the conveying surface of the rollers R of the roller conveyor C. The roller conveyor C is driven to stop the work W at a position above the work support surface of the work hanger 12. Subsequently, the elevating motor 30 is driven to rotate the pinions 33, 33.
The work W on the rollers R of the roller conveyor C is moved onto the work hanger 12 by raising the slide plate 24 integrally provided with the racks 25 meshed with the work rails 3, 33 along the guide rails 22, 22. Scoop and raise the cabinet 1 to the center.

When the revolving motor 44 is driven, the driving gear 4
6 and the driven gear 47 rotate the revolving shaft 42, and the hanger shaft 11 supported by the gear box 51 that rotates integrally with the revolving shaft 42 is moved together with the work hanger 12 along the axis L.
Revolve around. At this time, if the rotation motor 45 is held in a stopped state, the rotation shaft 43 and the first interlocking gear 55 are fixed to the cabinet 1 so that they cannot rotate with respect to the cabinet 1. The gear 56 performs two rotations for one revolution. If the rotation motor 45 is driven to rotate in the forward and reverse directions, the rotation direction and rotation speed of the second interlock gear 56, that is, the work hanger 12, can be arbitrarily controlled according to the rotation direction and rotation speed.

When the elevating motor 30 is driven to rotate in the forward and reverse directions, the work hanger 12 moves up and down via the pinions 33, 33 and the racks 25, 25 as described above. At this time, a spline rod 52 extending downward from the gear box 51 slides against a spline nut 53 provided at the upper end of the cylindrical member 6 and is supported on the outer periphery of the hanger shaft 11 extending downward from the gear box 51. 10 moves up and down while being guided by the guide rollers 9 and 9. The rotation of the gear box 51 is transmitted to the cylindrical member 6, the rotating disk 5 and the closing plate 7 via the spline rod 52 and the spline nut 53, and these are transmitted to the work hanger 12.
Rotate in conjunction with the revolution of.

As schematically shown in FIG. 5, the work hanger 12 is revolved while rotating, and the shots are projected from the nozzles 14 and 15 onto the work W while being reciprocated up and down. By uniformly projecting a shot from the direction, scale and rust attached to the work W can be effectively removed. In the embodiment, the number of revolutions of the work hanger 12 is 4 times per minute, the number of revolutions of the work hanger 1 is 2 times per minute, the elevating speed of the work hanger 12 is 2.8 m / min, and the shot projection time is 8 minutes. Is set to

When the processing of the work W is completed, the revolving motor 44 and the rotation motor 45 are stopped to stop the rotation of the work hanger 12, and the work hanger 12 is lowered by the elevating motor 30 to move the work W to the roller conveyor C. Transfer to roller R ... Then, the roller conveyor C is driven to discharge the processed work W from the cabinet 1 to prepare for carrying in the next unprocessed work W.

Although the embodiments of the present invention have been described in detail, various design changes can be made in the present invention without departing from the gist thereof.

[0025]

As described above, according to the first aspect of the present invention, a shot is projected on a work which revolves while rotating and reciprocates along the axis of the revolution.
By uniformly projecting shots from various angles with respect to the work, foreign substances adhering to the surface of the work can be effectively removed.

According to the second aspect of the present invention,
When the revolving shaft is driven by the revolving drive source to rotate a gear box integrated with the revolving shaft, the work hanger revolves around the revolving shaft together with the hanger shaft supported by the gear box. When the rotation shaft is rotationally driven by the rotation driving source, the rotation is transmitted to the hanger shaft via connection means provided inside the gear box, and the work hanger rotates with the hanger shaft. When the bearing block is reciprocated by the reciprocating drive source, the work hanger reciprocates together with the hanger shaft supported by the bearing block. Since the work hanger reciprocates while revolving and rotating in this manner, it is possible to uniformly project shots from various angles with respect to the work and to effectively remove foreign substances attached to the surface of the work.

According to the third aspect of the present invention, the reciprocating drive for raising and lowering the work hanger without providing a special work transfer device by allowing the work hanger to pass vertically between the rollers of the roller conveyor. The source can be used to transfer work between the work hanger and the roller conveyor.

[Brief description of the drawings]

FIG. 1 is an overall front view of a shot blasting apparatus.

FIG. 2 is a sectional view taken along line 2-2 of FIG.

FIG. 3 is a sectional view taken along line 3-3 in FIG. 1;

FIG. 4 is an enlarged view of a main part of FIG. 2;

FIG. 5 is a conceptual diagram of a shot blasting apparatus.

[Explanation of symbols]

 REFERENCE SIGNS LIST 11 hanger shaft 12 work hanger 30 elevating motor (reciprocating drive source) 41 bearing block 42 revolution shaft 43 rotation shaft 44 revolution motor (revolution drive source) 45 rotation motor (rotation drive source) 51 gearbox 52 1 Interlocking gear (connection means) 53 Second interlocking gear (connection means) C Roller conveyor L Axis line R Roller W Work

Claims (3)

[Claims] 1. A shot blasting method for projecting a shot onto a work (W) to remove foreign matter adhering to the surface of the work (W), wherein the work (W) revolving while rotating about the axis (L) of the revolution. A shot blasting method characterized by projecting a shot while reciprocating along ()). 2. A shot blasting device for projecting a shot onto a work (W) to remove foreign matter adhering to the surface of the work (W), wherein a bearing block (41) reciprocated by a reciprocating drive source (30). A hollow revolving shaft (4) rotatably supported by a bearing block (41) and rotationally driven by a revolving drive source (44).
2) and a rotation shaft (43) rotatably driven by a rotation drive source (45) supported rotatably inside the revolution shaft (42).
And a gear box (51) that rotates integrally with the revolution shaft (42).
And the gear box (5) at a position eccentric from the revolution shaft (42).
1) a hanger shaft (11) rotatably supported on the hanger shaft (11), a work hanger (12) provided on the hanger shaft (11) to support the work (W), and a gear box (51) housed inside. Rotation axis (4
3) connecting means (55, 56) for transmitting the rotation of the hanger to the hanger shaft (11), and nozzles (14, 15) for projecting a shot onto the work (W) supported on the work hanger (12). A shot blasting device characterized by the above-mentioned. 3. The work hanger (12) transmits and receives the work (W) by vertically passing between rollers (R) of a roller conveyor (C) for carrying in / out the work (W). The shot blasting device according to claim 2, characterized in that: