Blast device

Abstract

To provide a blasting device that can keep costs down and prevent the overall length of the device from increasing. [Solution] The blasting device 1 comprises a movable part 10 that is movable in a predetermined direction (front-to-back direction), a projector 20 that is held by the movable part 10 and projects abrasive material toward the workpiece W, and a plurality of workpiece support parts 50 that are provided along a predetermined direction (front-to-back direction) and support the workpiece W.

Description

Technical Field

[0001] The present invention relates to a blasting device for polishing a workpiece to be polished (hereinafter referred to as "workpiece").

Background Art

[0002] As a blasting device for polishing the outer peripheral surface of a long workpiece, there is a blasting device provided with a large number of projectors that project a polishing material onto the long workpiece from the large number of projectors. Also, as a similar blasting device, there is a blasting device that projects a polishing material onto the moving workpiece from a plurality of projectors while moving the long workpiece in its axial direction.

Summary of the Invention

Problems to be Solved by the Invention

[0003] The above-described blasting device provided with a large number of projectors is an expensive device. Also, in the above-described blasting device that moves the long workpiece in its axial direction, the overall length of the device becomes several tens of meters, which is extremely long.

[0004] Therefore, an object of the present invention is to provide a blasting device that can suppress the price and suppress the increase in the overall length of the device.

Means for Solving the Problems

[0005] In order to solve the above problems, a blasting device according to an embodiment of the present invention is a blasting device for polishing the outer surface of a workpiece, and includes a moving part provided movably in a predetermined direction, a projector held by the moving part and projecting a polishing material toward the workpiece, and a plurality of workpiece support parts provided along a predetermined direction and supporting the workpiece.

[0006] Each workpiece support has a reciprocating portion that is movable in a direction intersecting the predetermined direction, and the reciprocating portion may be movable between a support position located on the movement path of the reciprocating portion and supporting the workpiece, and a non-support position that is retracted from both the movement path of the reciprocating portion and the workpiece.

[0007] The moving unit has a cabinet that houses the plurality of projectors, and as the moving unit moves, a part of the workpiece may enter the cabinet, and abrasive material may be projected from the plurality of projectors onto the part of the workpiece located inside the cabinet.

[0008] The cabinet houses an abrasive material collection and supply unit that collects the abrasive material projected from the multiple projectors and supplies the collected abrasive material to the multiple projectors, and a dust collector that collects dust generated by the abrasive cleaning process. The abrasive material collection and supply unit and the dust collector may move along with the movement of the mobile unit.

[0009] The workpiece support may be configured to support the workpiece without allowing it to rotate around its axis. The workpiece support may also be configured to allow the workpiece to rotate around its axis. [Effects of the Invention]

[0010] According to the present invention, it is possible to provide a blasting apparatus that can reduce costs and suppress an increase in the overall length of the apparatus. [Brief explanation of the drawing]

[0011] [Figure 1] This is a front view of a blast apparatus according to an embodiment. [Figure 2] Figure 1 is a top view of the blasting apparatus. [Figure 3] Figure 1 is a side view of the blasting apparatus. [Modes for carrying out the invention]

[0012] A blast apparatus according to an embodiment of the present invention will be described with reference to the drawings.

[0013] <Overall Structure> First, the overall configuration of the blasting apparatus 1 according to this embodiment will be described. The blasting apparatus 1 of this embodiment is a blasting apparatus suitable for external surface cleaning of a workpiece W. The workpiece W is, for example, a seamless cylinder with two openings.

[0014] Figures 1-3 show the front view, top view, and side view of the blasting apparatus 1. The blasting apparatus 1 is installed on the floor surface 2. The blasting apparatus 1 comprises a mobile unit 10, a plurality of projectors 20, an abrasive material recovery and supply unit 30, a dust collection unit 40, a plurality of workpiece support units 50, and a control unit 60. The control unit 60 has a control computer composed of a calculation unit, a memory unit, etc., and controls the operation of the mobile unit 10, the plurality of projectors 20, the abrasive material recovery and supply unit 30, the dust collection unit 40, and the workpiece support units 50. The control unit 60 is located in the mobile unit 10. In this specification, the left side of the blasting apparatus 1 shown in Figures 1 and 2 will be referred to as the "front side," and the right side of the blasting apparatus 1 will be referred to as the "rear side."

[0015] The mobile unit 10 comprises a first trolley 11, a cabinet 12, and a motor (not shown). The first trolley 11 is movable in the forward and backward directions on two main rails 3 installed on the floor surface 2 by a motor (not shown). The forward and backward directions correspond to predetermined directions. The cabinet 12 has a rectangular parallelepiped shape and is fixed to the first trolley 11. A pair of winding devices 13 are attached to the front side of the first trolley 11. A power cable 14 and an air cable 15 are wound around each winding device 13. Each winding device 13 has a winding spring. Electricity is supplied to the mobile unit 10, a plurality of projectors 20, an abrasive material recovery and supply unit 30, a dust collection unit 40, and a control unit 60 from a power source (not shown) via the power cable 14. Air is supplied to the plurality of projectors 20 from an air source (not shown) via the air cable 15.

[0016] Circular through-holes 12a (Figure 3) are formed in the front and rear walls of the cabinet 12. During the grinding process, the workpiece W passes through each through-hole 12a. The diameter of the through-holes 12a is set to be slightly larger than the diameter of the workpiece W (for example, 5 mm). Opening and closing doors 16 are mounted on the front and rear walls of the cabinet 12 to open and close the through-holes 12a. The opening and closing doors 16 are, for example, air-crank type doors, and the through-holes 12a are opened and closed by moving up and down. Multiple curtains 17 are provided inside the cabinet 12, corresponding to each through-hole 12a. Each curtain 17 has a hole formed in it that is the same shape as the through-hole 12a.

[0017] In this embodiment, four projectors 20 are provided. Each projector 20 is held in a cabinet 12 and is arranged at equal intervals along the circumferential direction of the workpiece W. Each projector 20 consists of a rotor and is configured to project abrasive material, for example, 0.4 mm shot grit, from the abrasive material tank 3 onto the workpiece W.

[0018] The abrasive material recovery and supply unit 30 comprises a screw conveyor 31, an elevator 32, a separator 33, and an abrasive material tank 34. The screw conveyor 31 transports the falling abrasive material to the elevator 32, the elevator 32 transports the abrasive material upward, and the separator separates the abrasive material (shot grit) and returns it to the abrasive material tank 34. The dust collection unit 40 collects dust and other particles generated by the abrasive cleaning process. The abrasive material recovery and supply unit 30 and the dust collection unit 40 are installed on the first trolley 11 and housed in a cabinet 12.

[0019] In this embodiment, a plurality of work support portions 50 are installed on the floor surface 2 of 7 units, and are provided at intervals along a pair of main rails 3 (along the front-rear direction). Each work support portion 50 includes a pair of support rails 51 and a forward / backward movement portion 52. The pair of support rails 51 are installed in parallel in a direction intersecting the front-rear direction (in a perpendicular direction in this embodiment). The forward / backward movement portion 52 has a second carriage 53 and a support base 54. The second carriage 53 is movable on the pair of support rails 51. The second carriage 53 is moved, for example, by air cylinder drive. The support base 54 is provided on the second carriage 53. The lower portion of the support base 54 is installed on the second carriage 53, and the upper portion of the support base 54 is configured to be located closer to the pair of main rails 3 than the lower portion.

[0020] The forward / backward movement portion 52 is movable between a support position that is located on the movement path of the moving portion 10 and supports the work W, and a non-support position that retreats from the movement paths of the work W and the moving portion 10. In FIG. 2, among the forward / backward movement portions 52 of the 7 work support portions 50, the 2 on the left side and the 3 on the right side are in the support position, and the remaining 2 are in the non-support position. In FIG. 3, the forward / backward movement portion 52 shown by the solid line is in the non-support position, and the forward / backward movement portion 52 shown by the broken line is in the support position. In the state where the forward / backward movement portion 52 is in the support position, the lower portion of the support base 54 is located outside the pair of main rails 3, and the upper portion of the support base 54 is located inside the pair of main rails 3.

[0021] <Polishing method> Next, the polishing method of the blasting device 1 will be described.

[0022] Before the start of polishing, the moving portion 10 is located at the front end portion of the pair of main rails 3 (the front side of the work W). The front and rear through holes 12a of the cabinet 12 are in a state of being closed by the opening / closing door 16. All the forward / backward movement portions 52 are in the support position and support the work W. The work W is supported by the work support portion 50 (forward / backward movement portion 52) in a state where it does not rotate about its axis.

[0023] From this state, the moving part 10 is moved backward at a constant speed. As the moving part 10 moves backward, the power cable 14 and the air cable 15 wound around each winder 13 are paid out. When the moving part 10 approaches the workpiece W, the opening and closing door 16 on the rear side of the moving part 10 operates, and the rear through-hole 12a becomes open. The foremost advancing and retreating part 52 retreats from the supporting state to the non-supporting position. Since the remaining six advancing and retreating parts 52 support the workpiece W, the workpiece W is prevented from falling from the workpiece support part 50. Abrasive cleaning materials are projected from the four projectors 20 onto the part of the workpiece W that has entered the cabinet 12.

[0024] Next, the opening and closing door 16 on the front side of the moving part 10 operates, and the front through-hole 12a becomes open. The cleaned part of the workpiece W exits to the outside through the open front through-hole 12a. As the moving part 10 moves backward, the advancing and retreating part 52 retreats from the supporting state to the non-supporting position so as not to collide with the moving part 10. After the moving part 10 passes, the advancing and retreating part 52 returns from the non-supporting position to the supporting state. Thus, even when some of the advancing and retreating parts 52 are in the retracted non-supporting position, the remaining advancing and retreating parts 52 are in the supporting state, so the workpiece W is prevented from falling from the workpiece support part 50. As the moving part 10 moves, the workpiece W is sequentially cleaned from the front end to the rear end by the four projectors 20.

[0025] When the rear end part of the workpiece W enters the cabinet 12, the opening and closing door 16 on the rear side operates, and the rear through-hole 12a becomes closed. When the cleaning of the entire workpiece W is completed and the rear end part of the workpiece W exits from the cabinet 12, the opening and closing door 16 on the front side operates, and the front through-hole 12a becomes closed. The moving part 10 moves to and stops at the rear end part (the rear side of the workpiece W) of the pair of main rails 3. When the moving part 10 moves forward, the power cable 14 and the air cable 15 are wound around each winder 13 by the force of the winding spring. The abrasive cleaning materials from the projector 20 are suppressed from exiting the cabinet 12 due to the gap between the workpiece W and the through-hole 12a being several millimeters and the plurality of curtains 17.

[0026] The blasting device 1 described above comprises a movable part 10 that is movable in a predetermined direction (front-to-back direction), a plurality of projectors 20 that are held by the movable part 10 and project abrasive material toward the workpiece, and a plurality of workpiece support parts 50 that are provided along the predetermined direction and support the workpiece W. With this configuration, a large number of projectors are not required, so the blasting device 1 can be made reasonably priced. Since the blasting device 1 does not move the workpiece W along its axial direction, the length of the blasting device 1 can be kept from increasing. Therefore, the installation area of ​​the blasting device 1 can be kept from increasing.

[0027] Each work support section 50 has a reciprocating section 52 that can move in a direction intersecting a predetermined direction. The reciprocating section 52 is movable between a support position located on the movement path of the moving section 10 and supporting the workpiece W, and a non-support position retracted from both the movement path of the moving section 10 and the workpiece W. As a result, the work support section 50 can support the workpiece W without the moving section 10 colliding with the reciprocating section 52 when the moving section 10 moves, allowing the workpiece W to be polished without being moved along its axial direction.

[0028] The mobile unit 10 has a cabinet 12 that houses multiple projectors 20. As the mobile unit 10 moves, a portion of the workpiece W enters the cabinet, and abrasive material is projected from the multiple projectors 20 onto the portion of the workpiece located inside the cabinet 12. This prevents the abrasive material from escaping outside the cabinet 12 and facilitates the circulation of the abrasive material.

[0029] The cabinet 12 houses an abrasive material collection and supply unit 30 that collects abrasive material projected from multiple projectors 20 and supplies the collected abrasive material to the multiple projectors 20, and a dust collector 40 that collects dust generated by the abrasive process. The abrasive material collection and supply unit 30 and the dust collector 40 are configured to move along with the movement of the mobile unit 10. This allows the blasting device 1 to have a simple configuration.

[0030] It should be noted that the present invention is not limited to the embodiments described above, and numerous modifications are possible within the scope of its essence.

[0031] The workpiece W was cylindrical, but it may also be square, H-shaped, or the like. The workpiece W was a seamless cylinder with both ends, but it may also be a steel pipe before the ends are drawn. There were four projectors 20, but any number is acceptable as long as the entire outer circumference of the workpiece W can be polished. There were seven workpiece support units 50, but any number is acceptable as long as the workpiece W can be properly supported.

[0032] In the above embodiment, the workpiece support unit 50 (forward / backward unit 52) ​​supported the workpiece W in a state where it could not rotate around its axis. However, the workpiece support unit 50 (forward / backward unit 52) ​​may be configured to allow the workpiece W to rotate around its axis. In this case, there may be only one projector 20, and the entire surface of the workpiece W can be processed with a single projector 20. Furthermore, with the blasting apparatus 1 of this embodiment, the entire surface of the workpiece W can be processed in one pass, regardless of whether the workpiece W is rotatable or immobile due to the workpiece support unit 50. It is also possible to reduce the number of projectors 20 and process one or two surfaces. [Explanation of Symbols]

[0033] 1: Blasting device, 10: Mobile unit, : Cabinet 12, 20: Projector, 30: Abrasive material recovery / supply unit, 40: Dust collector, 50: Work support unit, 52: Advance / return unit, W: Workpiece

Claims

1. A blasting device for cleaning the outer surface of a workpiece, A movable part that is provided to be movable in a predetermined direction, A projection machine, which is held by the aforementioned moving part and projects abrasive material toward the workpiece, A blasting apparatus comprising a plurality of workpiece support sections arranged along a predetermined direction to support a workpiece.

2. Each workpiece support has a reciprocating portion that can move in a direction intersecting the predetermined direction, The blast apparatus according to claim 1, wherein the advancing and retracting portion is movable between a support position located on the movement path of the moving portion and supporting a workpiece, and an unsupport position located on the movement path of the moving portion and retracted from the workpiece.

3. The mobile unit has a cabinet that houses the plurality of projectors, The blast apparatus according to claim 1, wherein the movement of the movable part causes a part of the workpiece to enter the cabinet, and abrasive material is projected from the plurality of projectors onto the portion of the workpiece located inside the cabinet.

4. The cabinet houses an abrasive material collection and supply unit that collects the abrasive material projected from the multiple projectors and supplies the collected abrasive material to the multiple projectors, and a dust collector that collects the dust generated by the abrasive cleaning process. The blast apparatus according to claim 3, wherein the abrasive material collection and supply unit and the dust collector also move along with the movement of the movable unit.

5. The blast apparatus according to claim 1, wherein the workpiece support portion is configured to support the workpiece in a state where it is not rotated about its axis.

6. The blast apparatus according to claim 1, wherein the workpiece support is configured to allow the workpiece to rotate around its axis.

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