Blast device

Abstract

This invention provides a blasting apparatus that can continue blasting even if one blasting unit fails, by using the remaining blasting units, thereby suppressing a decrease in workpiece processing time. [Solution] The blasting apparatus 1 comprises a main transport unit 6 that transports a workpiece W along a predetermined direction, a plurality of first abrasive units 7 arranged on one side of the main transport unit 6 along the predetermined direction, a plurality of second abrasive units 8 arranged on the other side of the main transport unit 6 along the predetermined direction, a first transport unit 9 provided on the opposite side of the main transport unit 6 with the plurality of first abrasive units 7 in between and extending along a predetermined direction, and a second transport unit 10 provided on the opposite side of the main transport unit 6 with the plurality of second abrasive units 8 in between and extending along a predetermined direction. The workpiece W transported by the main transport unit 6 is abrasively cleaned by one of the plurality of first abrasive units 7 and the plurality of second abrasive units 8, and the abrasively cleaned workpiece W is transported to the workpiece discharge unit 14 by the first transport unit 9 or the second transport unit 10.

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 inner surface of a long seamless cylinder, there is a blasting device provided with three nozzles installed at separate locations, moving the cylinder to the location of each nozzle, polishing the upper surface (shoulder) of the cylinder with the first nozzle, polishing the bottom surface of the cylinder with the second nozzle, and polishing the inner surface of the body portion of the cylinder with the third nozzle.

Summary of the Invention

[0006] The workpiece is a cylinder with one or two openings, and each of the plurality of first and second abrasive sections has a workpiece uprighting section that raises the workpiece from the horizontal to the vertical, and a workpiece holding section that maintains the upright position of the workpiece, and the workpiece uprighting section has a workpiece receiving section with a tapered inclined surface, and the workpiece may be configured to be raised upright when the shoulder of the workpiece comes into contact with the inclined surface of the workpiece receiving section when raising the workpiece from the horizontal to the vertical.

[0007] Each of the plurality of first and second abrasive cleaning units may have a detection unit that contacts the upper end of an upright workpiece and detects the length of the workpiece.

[0008] Each of the plurality of first and second abrasive units may include a first nozzle and a second nozzle that project abrasive material and extend along the vertical direction, and a switching mechanism that switches between the first nozzle and the second nozzle so that they are located below the workpiece on the extension of the central axis of the workpiece.

[0009] The system may be equipped with a frame placed on the floor, and the main transport unit, the first transport unit, and the second transport unit may be arranged on the frame. [Effects of the Invention]

[0010] According to the present invention, even if one abrasive section fails, abrasive cleaning can still be performed using the remaining sections, and a blasting apparatus can be provided that can suppress a decrease in workpiece processing time. [Brief explanation of the drawing]

[0011] [Figure 1] This is a schematic top view of a blasting apparatus according to one embodiment. This is a schematic top view and a schematic front view of blasting apparatus 1. [Figure 2] This is a schematic front view of a blast apparatus according to one embodiment. [Figure 3] This is a top view of part of the main transport section, part of the first transport section, and the first cleaning section. [Figure 4] This is a front view of the first research and cleaning unit. [Figure 5] This is a side view of the first research and cleaning section. [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] 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 internal surface abrasion treatment of a workpiece W. The workpiece W is, for example, a single-ended seamless cylinder.

[0014] Figures 1 and 2 are schematic top and front views of the blasting apparatus 1. The blasting apparatus 1 is installed on the floor surface 2. The blasting apparatus 1 comprises a frame 3, a workpiece loading section 4, an inlet workpiece rotating section 5, a main transport section 6, multiple first abrasive sections 7, multiple second abrasive sections 8, a first transport section 9, a second transport section 10, a first loading section 11, a second loading section 12, an outlet workpiece rotating section 13, a workpiece unloading section 14, a dust collector 15, and a control unit 16. The control unit 16 has a control computer composed of a calculation section, a storage section, etc., and controls the operation of the blasting apparatus 1. 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." The front-rear direction corresponds to a predetermined direction.

[0015] The frame 3 is made of steel and is installed on the floor surface 2. The workpiece loading section 4 is installed on the floor surface 2 and is a device (lifter) that sequentially raises the workpieces W that have flowed along the line to the entrance workpiece rotating section 5, and is driven by a motor. The entrance workpiece rotating section 5 is installed on the frame 3. The workpieces W that have been raised in the workpiece loading section 4 are pushed by an air cylinder and move while rolling, stopping in the center of the entrance workpiece rotating section 5. At this time, the longitudinal direction of the workpieces W is perpendicular to the front-to-back direction of the blasting device 1. The entrance workpiece rotating section 5 has a rotatable table, and rollers are provided on the table. As the table rotates, the longitudinal direction of the workpieces W becomes parallel to the front-to-back direction of the blasting device 1. In this state, as the rollers rotate, the workpieces W are transported to the main transport section 6.

[0016] The main conveying unit 6 is installed on a frame 3, consists of a roller conveyor, and extends along the front-to-back direction. The main conveying unit 6 conveys the workpiece W to the rear. On both sides of the main conveying unit 6 along the front-to-back direction, there are multiple (four) first abrasive cleaning units 7 and multiple (four) second abrasive cleaning units 8. Each first abrasive cleaning unit 7 and each second abrasive cleaning unit 8 abrases the workpiece W conveyed by the main conveying unit 6. The detailed configuration of the multiple first abrasive cleaning units 7 and multiple second abrasive cleaning units 8 will be described later.

[0017] The first conveying section 9 is installed on the frame 3 and is located on the opposite side of the main conveying section 6, flanking the multiple first abrasive sections 7. The second conveying section 10 is installed on the frame 3 and is located on the opposite side of the main conveying section 6, flanking the multiple second abrasive sections 8. The first conveying section 9 and the second conveying section 10 are composed of roller conveyors and extend along the front-rear direction. The first conveying section 9 conveys the workpieces W abraded by each first abrasive section 7 to the rear. The second conveying section 10 conveys the workpieces W abraded by each second abrasive section 8 to the rear.

[0018] The first loading unit 11 is installed on the frame 3 and is located inside the rear end of the first conveying unit 9. The first loading unit 11 sends the workpiece W that has been conveyed to the rear end of the first conveying unit 9 to the exit workpiece rotating unit 13. The second loading unit 12 is installed on the frame 3 and is located inside the rear end of the second conveying unit 10. The second loading unit 12 loads the workpiece W that has been conveyed to the rear end of the second conveying unit 10 into the exit workpiece rotating unit 13.

[0019] The exit workpiece rotating section 13 is installed on the frame 3. Workpieces W loaded from the first loading section 11 or the second loading section 12 stop in the center of the exit workpiece rotating section 13. The longitudinal direction of the workpiece W is parallel to the front-rear direction of the blasting device 1. The exit workpiece rotating section 13 has a rotatable table, on which rollers are provided. As the table rotates, the longitudinal direction of the workpiece W becomes perpendicular to the front-rear direction of the blasting device 1. In this state, as the rollers rotate, the workpiece W is transported to the workpiece unloading section 14. The workpiece unloading section 14 is installed on the floor surface 2 and is a device (lifter) that lowers the workpiece W, driven by a motor. The dust collector 15 collects dust and other particles generated by the abrasion treatment.

[0020] Next, the main transport unit 6, the first transport unit 9, and the first abrasive unit 7 will be described. Figure 3 is a top view of a part of the main transport unit 6, a part of the first transport unit 9, and the first abrasive unit 7. Figures 4 and 5 are a front view and a side view of the first abrasive unit 7. Since the first abrasive unit 7 and the second abrasive unit 8 have similar configurations, the description of the second abrasive unit 8 will be omitted.

[0021] As shown in FIG. 3, the first grinding and cleaning unit 7 includes a work input unit 20, a work upright unit 21, a grinding and cleaning unit 30, and a work discharge unit 22. The work input unit 20, the work upright unit 21, and the work discharge unit 22 are installed on the gantry 3. Thus, the blasting device 1 can be pitless, and installation, movement, etc. of the device can be easily performed.

[0022] As shown in FIGS. 3 and 5, a plurality of swing pieces 20A, 21A, 6A, 9A, a plurality of support pieces 20B, 21B, 22A, and air cylinders 20C, 21C, 6B, 9B are provided in the work input unit 20, the work upright unit 21, the work discharge unit 22, the portion of the main transport unit 6 facing the work input unit 20, and the portion of the first transport unit 9 facing the work discharge unit 22, respectively. The swing pieces 20A, 21A, 6A, 9A are provided so as to be swingable, and are swung by the air cylinders 20C, 21C, 6B, 9B. The plurality of support pieces 20B, 21B, 22A are fixed so as not to be swingable. When the air cylinders 6B, 20C are driven to swing the respective swing pieces 6A, 20A, the work W rolls. Thereby, the work W moves while rolling from the main transport unit 6, through the work input unit 20, to the work upright unit 21. The work W after grinding and cleaning moves while rolling from the work upright unit 21, through the work discharge unit 22, to the first transport unit 9.

[0023] Similarly in the second grinding and cleaning unit 8, the work W moves while rolling from the main transport unit 6 to the second transport unit 10. The first loading unit 11, the second loading unit 12, the portion of the first transport unit 9 facing the first loading unit 11, and the portion of the second transport unit 10 facing the second loading unit 12 have the same configuration. Therefore, the work W moves while rolling from the first transport unit 9 or the second transport unit 10, through the first loading unit 11 or the second loading unit 12, to the outlet work rotating unit 13.

[0024] As shown in Figure 4, the workpiece upright section 21 includes a workpiece support section 21C, an air cylinder 21D, and a workpiece receiving section 21E. The workpiece support section 21C extends along the front-rear direction and is rotatably mounted around its front end. The workpiece support section 21C is the part on which the workpiece W from the workpiece input section 20 rests. The air cylinder 21D rotates the workpiece support section 21C around its front end. The workpiece receiving section 21E is provided at the front end of the workpiece support section 21C and has a through hole 21f. The through hole 21f has a tapered inclined surface that narrows towards the front. When the workpiece support section 21C is rotated around its front end, the tip of the workpiece W enters the through hole 21f of the workpiece receiving section 21E, the shoulder of the workpiece W contacts the inclined surface of the through hole 21f, and the workpiece support section 21C is rotated until the central axis of the workpiece receiving section 21E faces vertically, so that the workpiece W stands upright in the vertical direction. In this way, the vertical position of the workpiece W can be easily ensured. The workpiece support portion 21E is rotatable about its central axis, and when the workpiece support portion 21E rotates, the workpiece W also rotates.

[0025] The abrasive cleaning unit 30 includes a housing 31, a workpiece holding unit 32, a nozzle lifting unit 33, a nozzle switching unit 34, and an abrasive material collection and supply unit 35. The housing 31 is installed on the floor surface 2, and the upper end of the housing 31 is located above the workpiece upright unit 21. As shown in Figures 3 to 5, the workpiece holding unit 32 has a plurality (five) of lower holding units 32A that contact the lower part of the workpiece W, and a length detection unit 32B. As shown in Figures 4 and 5, the length detection unit 32B includes a detection cap 32C, a guide roller 32D, and a motor 32E. The detection cap 32C is dome-shaped and can move up and down by the motor 32E and the guide roller 32D. The detection cap 32C descends to contact the upper end of the workpiece W to hold the workpiece W and detects the length of the workpiece W. The control unit 16 sets the movement lengths of the first nozzle 34A and the second nozzle, described later, based on the detected length of the workpiece W. The workpiece holding unit 32 maintains the upright position of the workpiece W.

[0026] As shown in Figure 4, the nozzle lifting section 33 includes a lifting mechanism 33A, a lifting shaft 33B, and a nozzle receiving section 33C. The lifting mechanism 33A is located above the frame 3 inside the housing 31 and is composed of a motor and rope, etc., and is capable of raising and lowering the lifting shaft 33B which extends vertically. The nozzle receiving section 33C is roughly L-shaped and is attached to the lower end of the lifting shaft 33B. A pneumatic chuck (air gripper) is provided at the tip of the nozzle receiving section 33C and is configured to grip the lower ends of the first nozzle 34A and the second nozzle.

[0027] The nozzle switching unit 34 includes a first nozzle 34A, a second nozzle (not shown), a first nozzle support unit 34B, a second nozzle support unit (not shown), and a switching mechanism (not shown). The first nozzle 34A extends vertically and has a tip nozzle portion at its end that is inclined diagonally upward, and is configured to project abrasive material diagonally upward. The second nozzle extends vertically and has a tip nozzle portion at its end that is inclined diagonally downward, and is configured to project abrasive material diagonally downward. The first nozzle support unit 34B holds the first nozzle 34A so that it can move up and down, and the second nozzle support unit holds the second nozzle so that it can move up and down. The switching mechanism (not shown) can position the first nozzle 34A and the first nozzle support unit 34B, or the second nozzle and the second nozzle support unit, on the lower side of the workpiece W and on the upper side of the tip of the nozzle receiving unit 33C. In other words, the switching mechanism (not shown) is configured to switch between the first nozzle 34A and the second nozzle so that it is located below the workpiece W on the extension of the central axis of the workpiece W. The switching mechanism (not shown) has, for example, a holding arm that holds the first nozzle support 34B and the second nozzle support, and is configured to switch between the first nozzle 34A and the second nozzle by rotating or moving the holding arm with a motor or the like.

[0028] The abrasive material recovery and supply unit 35 includes a screw conveyor 35A, an elevator 35B, a separator 35C, an abrasive material tank 35D, first and second supply pipes 35E and 35F, and two hoses (not shown). The screw conveyor 35A transports the falling abrasive material to the elevator 35B, the elevator 35B transports the abrasive material upward, and the separator 35C separates the abrasive material (shot grit) and returns it to the abrasive material tank 35D. The first and second supply pipes 35E and 35F are connected to the bottom of the abrasive material tank 35D, and hoses are connected to each of the first and second supply pipes 35E and 35F, and each hose is connected to the lower end of the first and second nozzles 34A. The abrasive material in the abrasive material tank 35D is supplied to the first and second nozzles 34A via the first and second supply pipes 35E and 35F and their respective hoses using high-pressure air. The first and second supply pipes 35E and 35F are provided with opening and closing sections, and by opening only one of the opening and closing sections, the abrasive material is supplied to only one of the nozzles. The system is configured to project abrasive material, for example, consisting of 0.7 mm shot grit, from the abrasive material tank 35D onto the workpiece W via the first and second nozzles 34A.

[0029] When cleaning a workpiece W held upright in the workpiece holding section 32, the lifting mechanism 33A slightly raises and stops the lifting shaft 33B and nozzle receiving section 33C, and the nozzle receiving section 33C grips the lower end of the first nozzle 34A. The lifting mechanism 33A further raises the lifting shaft 33B and nozzle receiving section 33C, inserting the first nozzle 34A into the workpiece W. While rotating the workpiece W around its axis, the opening and closing section of the first supply pipe 35E is opened to supply abrasive material to the first nozzle 34A, causing the first nozzle 34A to rise and fall at a constant speed. The length by which the first nozzle 34A is raised is the same as the movement length set in the control unit 16. Abrasive material is projected from the tip nozzle of the first nozzle 34A, cleaning the upper surface and the inner surface of the body of the workpiece W.

[0030] When the grinding is complete, the supply of grinding material is stopped, the first nozzle 34A is removed from the workpiece W, and the first nozzle 34A is lowered to its lowest position supported by the first nozzle support 34B. The grip of the lower end of the first nozzle 34A by the nozzle receiving 33C is released, and the nozzle receiving 33C is lowered slightly. A switching mechanism (not shown) switches from the first nozzle 34A and the first nozzle support 34B to the second nozzle and the second nozzle support. The nozzle receiving 33C is raised slightly and stopped, and the lower end of the second nozzle is gripped by the nozzle receiving 33C. In the same way as with the first nozzle 34A, the second nozzle is inserted into the workpiece W, and the lower surface and the inner surface of the body of the workpiece W are ground. At this time, only the opening / closing part of the second supply pipe 35F is opened in order to supply grinding material to the second nozzle 34A. In this way, the entire inner surface of the workpiece W is ground by the two nozzles.

[0031] In the blasting apparatus 1, the workpiece W, which is raised in the workpiece loading section 4, is rotated in the inlet workpiece rotation section 5 and transported to the main transport section 6. The workpiece W is blasted in the available blasting section from the front of the multiple first blasting sections 7 and multiple second blasting sections 8, starting from the front. Subsequent workpieces W are blasted in the available blasting sections in sequence. After blasting, the workpiece W is transported to the rear by the first transport section 9 or the second transport section 10, rotated in the exit workpiece rotation section 13, lowered in the workpiece discharge section 14, and discharged from the blasting apparatus 1. Therefore, even if one blasting section fails, blasting can still be performed in the remaining blasting sections, thus suppressing a decrease in the processing time of the workpiece W.

[0032] 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.

[0033] For example, the workpiece W was a seamless cylinder with one opening, but it could also be a seamless cylinder with two openings. There were four first scrubbing units 7 and four second scrubbing units 8, but any number of units, two or more, is acceptable. [Explanation of symbols]

[0034] 1: Blasting device, 3: Stand, 4: Workpiece loading section, 6: Main transport section, 7: First abrasion section, 8: Second abrasion section, 9: First transport section, 10: Second transport section, 14: Workpiece unloading section, 21: Workpiece upright section, 21E: Workpiece receiving section, 32: Workpiece holding section, 32B: Length detection section, W: Workpiece

Claims

1. A blasting device for polishing a workpiece which is a single-ended or double-ended cylinder, Work loading area, Workpiece unloading section, A main transport unit that extends along a predetermined direction and transports the workpiece from the workpiece loading section along that predetermined direction, A plurality of first cleaning units are arranged on one side of the main transport unit along the predetermined direction, A plurality of second cleaning units are arranged on the other side of the main transport unit along the predetermined direction, A first conveying section is provided on the opposite side of the main conveying section, with the plurality of first cleaning sections in between, and extends along the predetermined direction, The system comprises a second conveying section provided on the opposite side of the main conveying section, with the plurality of second cleaning sections in between, and extending along the predetermined direction, A blast apparatus configured such that a workpiece conveyed by the main conveying unit is moved to one of the plurality of first and second cleaning units that is not currently undergoing cleaning, where the inner surface of the workpiece is cleaned, and the cleaned workpiece is then conveyed to the workpiece discharge unit by the first or second conveying unit.

2. Each of the aforementioned plurality of first and plurality of second grinding units includes a workpiece uprighting unit that raises the workpiece from the horizontal to the vertical, and a workpiece holding unit that maintains the upright state of the workpiece. The workpiece uprighting portion has a workpiece receiving portion having a tapered inclined surface, and is configured such that when the workpiece is raised from the horizontal to the vertical, the shoulder of the workpiece comes into contact with the inclined surface of the workpiece receiving portion, thereby raising the workpiece upright. The blast apparatus according to claim 1, wherein the plurality of first scrubbing units and the plurality of second scrubbing units are configured to scrub the inner surface of an upright workpiece.

3. The plurality of first abrasive cleaning units and the plurality of second abrasive cleaning units are, Abrasive material is projected, and a first nozzle and a second nozzle extending vertically, The blast apparatus according to claim 2, further comprising a switching mechanism for switching the first nozzle or the second nozzle so that it is located on the extension of the central axis of the workpiece and on the underside of the workpiece.

4. The plurality of first abrasive cleaning units and the plurality of second abrasive cleaning units are each, A length detection unit that contacts the upper end of an upright workpiece and detects the length of the workpiece. The blast apparatus according to claim 3, further comprising a nozzle lifting unit that raises or lowers the first nozzle or the second nozzle located below the workpiece based on the length of the workpiece detected by the length detection unit.

5. Equipped with a stand placed on the floor, The blast apparatus according to claim 1, wherein the main transport unit, the first transport unit, and the second transport unit are arranged on the frame.

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