JP2014180728A - Shot blast device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To uniformly apply abrasive blasting to the whole surface of a rod-like workpiece.SOLUTION: A shot blast device includes a rotary carrier part 30 that carries a rod-like workpiece 20 in the axial direction of the workpiece 20 while rotating the workpiece 20 on the axis of the workpiece 20, and a projection part 50 that uniformly applies abrasive blasting to the workpiece 20 by projecting a projection material to the workpiece 20 carried in the axial direction of the workpiece 20, while being rotated on the axis of the workpiece 20 by the rotary carrier part 30.

Description

  The present invention relates to a shot blasting apparatus that performs a blasting process by projecting a projection material onto a rod-shaped workpiece.

  As a shot blasting device, for example, there is a device that carries a blasting process by projecting a projection material onto a workpiece carried into the cabinet by a projection unit while carrying the workpiece into the cabinet by a conveyor (see, for example, Patent Document 1). ). However, since such a shot blasting device has only a function for the conveyor to convey the workpiece in the conveyance direction, the bottom surface of the workpiece cannot be blasted, and the entire surface of the workpiece can be blasted uniformly. I can't.

Japanese Patent No. 2012-30313

  The present invention has been made in view of the above problems, and is a shot blasting apparatus capable of projecting a projection material onto a rod-shaped workpiece and uniformly blasting the entire surface of the rod-shaped workpiece. The purpose is to provide.

  The shot blasting apparatus according to the present invention includes a rotary conveyance unit that conveys a rod-shaped workpiece in the axial direction of the workpiece while rotating the workpiece around the axis of the workpiece, and a workpiece that is rotated around the axis of the workpiece by the rotary conveyance unit. A projection unit that projects a projection material onto the workpiece conveyed in the axial direction and uniformly blasts the workpiece.

  Furthermore, the rotary conveyance unit is a V-shaped conveyor roller that gradually decreases in diameter from both ends in the axial direction toward the center, and the central part in the axial direction is constricted. A plurality of them may be arranged at a predetermined interval along the axis, and the axial direction may be inclined with respect to the conveying direction of the workpiece.

  Further, the first conveyor roller group arranged in an odd number among the plurality of conveyor rollers is driven by a first drive mechanism installed on one end side in the conveyance width direction substantially orthogonal to the workpiece conveyance direction. The second conveyor roller group arranged in even numbers among the plurality of conveyor rollers is driven by a second drive mechanism installed on the other end side in the conveyance width direction substantially orthogonal to the workpiece conveyance direction. You may make it.

  Furthermore, you may make it further provide the intermittent feeding part which supplies a workpiece | work intermittently to a rotation conveyance part.

  Further, the projection unit may project from two directions in the front and rear direction of the workpiece conveyance direction.

  In the present invention, the rod-shaped workpiece is conveyed in the axial direction of the workpiece while being rotated about the axis of the workpiece by the rotary conveying unit, so that the axial direction of the workpiece is rotated by the projection unit about the axis of the workpiece. By projecting the projection material onto the rod-shaped workpiece being conveyed, the entire surface of the rod-shaped workpiece can be blasted uniformly.

It is the front view which showed the shot blasting apparatus to which this invention is applied. It is the top view which showed the rotation conveyance part.

  Hereinafter, a shot blasting apparatus to which the present invention is applied will be described in detail with reference to the drawings. In addition, this invention is not limited to the following examples, In the range which does not deviate from the summary of this invention, it can change arbitrarily.

  As shown in FIG. 1, a shot blasting apparatus 1 to which the present invention is applied includes a cabinet 11 on a base member 10. Inside the cabinet 11, a projection chamber 11 a is formed in which a projecting material is projected onto a round bar-shaped workpiece 20 to subject the workpiece 20 to surface processing (blast processing). In addition, the cabinet 11 is formed with a carry-in portion 12 on the upstream side (right side in the figure) in the workpiece conveyance direction (arrow X direction) where the workpiece 20 is carried into the projection chamber 11a from the outside. On the left side, a carry-out portion 13 is formed through which the work 20 is carried out from the projection chamber 11a.

  Further, as shown in FIG. 1, on the base member 10, there is provided a rotary conveyance unit 30 that conveys the workpiece 20 in the axial direction (work conveyance direction) of the workpiece 20 while rotating the workpiece 20 around the axis of the workpiece 20. Yes. As shown in FIG. 2, the rotary conveyance unit 30 includes a plurality of conveyor rollers 31 on which the workpiece 20 is placed, and first and second drive mechanisms 32 and 33 that rotationally drive these conveyor rollers 31. doing.

  The conveyor roller 31 is formed in a so-called drum shape (V-shape) in which the diameter gradually decreases from both ends in the axial direction toward the center, and the central portion in the axial direction is constricted. Further, on the surface of the conveyor roller 31, in order to improve the rotation and progress of the work 20, a groove-shaped engagement portion (not shown) is formed at predetermined intervals around the axis along the axial direction. Are formed. Such a conveyor roller 31 is integrally provided on the outer periphery of the output shaft 34, and the conveyor bases 35, 35 provided on both sides in the workpiece conveyance width direction substantially orthogonal to the workpiece conveyance direction via the output shaft 34. Is rotatably supported. Further, a plurality of conveyor rollers 31 are arranged at a predetermined interval along the workpiece conveyance direction of the workpiece 20. Here, 30 conveyor rollers 31 are arranged. Furthermore, the conveyor rollers 31 are provided such that the axial direction is inclined with respect to the workpiece conveying direction, and are provided in parallel to each other. Furthermore, the conveyor roller 31 is disposed close to the constricted portion at the center of one conveyor roller 31 so that the enlarged portion at the end of the other conveyor roller 31 is located, for example.

  Further, odd-numbered conveyor rollers (hereinafter also referred to as a first conveyor roller group) 31a arranged at odd-numbered first, third, fifth, etc. from the upstream side to the downstream side in the workpiece conveying direction are: The one end side of the output shaft 34 is provided so as to protrude toward the one end side from the conveyor base 35 on the one end side. The first conveyor roller group 31a is provided with a first drive mechanism 32 at a protruding portion on one end side of the output shaft 34, and is provided so as to be simultaneously rotated at the same speed by the first drive mechanism 32. ing.

  The 1st drive mechanism 32 is installed in the upstream of the one end side of a workpiece conveyance width direction, the 1st motor 36 which drives the 1st conveyor roller group 31a, and the output shaft 34 of the 1st conveyor roller group 31a. Of the first sprocket 37 provided in the middle of the projecting portion, the second sprocket 38 provided at the end of the projecting portion of the output shaft 34, the first motor 36 and the first conveyor roller 31. A roller chain 39 is connected to the first sprocket 37 and connects the second sprocket 38 of one conveyor roller 31 and the first sprocket 37 of another conveyor roller 31. That is, the output shaft of the first motor 36 is connected to the first sprocket 37 of the first conveyor roller 31 on the most upstream side via the roller chain 39 and is connected to the second sprocket 38 of the first conveyor roller 31. Is connected to the first sprocket 37 of the third conveyor roller 31 via the roller chain 39, and the second sprocket 38 of the third conveyor roller 31 is connected to the fifth conveyor roller 31 via the roller chain 39. In the same manner, the second sprocket 38 of one conveyor roller 31 is connected to the first sprocket 37 of another conveyor roller 31 through a roller chain 39. .

  Accordingly, the first drive mechanism 32 transmits the rotation of the output shaft of the first motor 36 to the first conveyor roller 31 via the roller chain 39, and the rotation of the first conveyor roller 31 is transferred to the roller chain. 39, the rotation of the third conveyor roller 31 is transmitted to the fifth conveyor roller 31 via the roller chain 39, and thereafter the first conveyor roller 31 is similarly transmitted. The conveyor roller 31 of the group 31a is driven. At this time, the first drive mechanism 32 simultaneously rotates the first conveyor roller group 31a at the same speed.

  The first drive mechanism 32 is not limited to being constituted by the first sprocket 37, the second sprocket 38, and the roller chain 39, but other conventionally known power such as a pulley and a belt. You may make it comprise with a transmission member.

  Furthermore, even-numbered conveyor rollers (hereinafter also referred to as a second conveyor roller group) 31b arranged in even-numbered positions such as second, fourth, and sixth from the upstream side to the downstream side in the workpiece conveyance direction are: The other end side of the output shaft 34 is provided so as to protrude to the other end side from the conveyor base 35 on the other end side. The second conveyor roller group 31b is provided with a second drive mechanism 33 provided at the projecting portion on the other end side of the output shaft 34 so as to be simultaneously rotated at the same speed by the second drive mechanism 33. It has been.

  The 2nd drive mechanism 33 is installed in the downstream of the other end side of a work conveyance width direction, the 2nd motor 40 which drives the 2nd conveyor roller group 31b, and the output shaft of the 2nd conveyor roller group 31b 34, the first sprocket 41 provided in the middle of the projecting portion, the second sprocket 42 provided at the end of the projecting portion of the output shaft 34, the second motor 40, and the 30th conveyor roller 31. And a roller chain 43 that connects the second sprocket 42 of one conveyor roller 31 and the first sprocket 41 of another conveyor roller 31. That is, the output shaft of the second motor 40 is connected to the first sprocket 41 of the 30th conveyor roller 31 on the most downstream side via the roller chain 43, and the second sprocket 42 of the 30th conveyor roller 31. Is connected to the first sprocket 41 of the 28th conveyor roller 31 via the roller chain 43, and the second sprocket 42 of the 28th conveyor roller 31 is connected to the 26th conveyor roller 31 via the roller chain 43. In the same manner, the second sprocket 42 of one conveyor roller 31 is connected to the first sprocket 41 of another conveyor roller 31 through a roller chain 43. .

  Therefore, the second drive mechanism 33 transmits the rotation of the output shaft of the second motor 40 to the 30th conveyor roller 31 via the roller chain 43, and the rotation of the 30th conveyor roller 31 is transmitted to the roller chain. The rotation of the 28th conveyor roller 31 is transmitted to the 26th conveyor roller 31 via the roller chain 43, and thereafter the second conveyor roller 31 is similarly transmitted. The conveyor roller 31 of the group 31b is driven. At this time, the second drive mechanism 33 simultaneously rotates the second conveyor roller group 31b at the same speed.

  The second drive mechanism 32 is not limited to being configured by the first sprocket 41, the second sprocket 42, and the roller chain 43, but may be another power transmission member such as a pulley and a belt. It may be configured.

  The rotary conveyance unit 30 having the above configuration is, for example, a workpiece conveyance direction while rotating a workpiece 20 having a weight of 300 g to 20000 g, a diameter of 20 mm to 500 mm, and a length of 50 mm or more around the axis of the workpiece 20. Can be conveyed.

  Furthermore, as shown in FIG. 1, a plurality of projection units 50 that project the projection material onto the workpiece 20 are arranged in the cabinet 11 above the rotary conveyance unit 30. For example, a total of two projection units 50 are arranged on the upstream side and the downstream side in the workpiece conveyance direction in the cabinet 11, respectively. The projection unit 50 is a conventionally known projection device such as a centrifugal (mechanical) projection device that projects a projection material by applying a centrifugal force to the projection material by rotating an impeller, for example, and detailed description thereof is omitted here. To do. Note that the two projection units 50 are not limited to being arranged in the cabinet 11, and one or three or more projection units 50 may be arranged, and the number of the projection units 50 can be changed as appropriate. Further, the projection unit 50 is not limited to a mechanical projection device, and is a pneumatic projection device that projects a projection material with compressed air, or a wet projection device that performs processing by mixing and injecting a projection material into water. May be. Moreover, the projection material projected by the projection unit 50 preferably has, for example, a particle diameter of φ0.3 mm to 3.0 mm. Further, the projecting material is a conventionally known projecting material formed of various materials such as metal, ceramic, resin, plant, and glass, and detailed description thereof is omitted here.

  Further, as shown in FIG. 1, on the base member 10, a gap is provided between the workpieces on the upstream side of the rotary conveyance unit 30, and the workpieces 20 are arranged at regular intervals on the upstream side of the rotary conveyance unit 30. The intermittent feeding part 60 which supplies intermittently is arranged. The intermittent feeding unit 60, for example, places one workpiece 20 of the plurality of workpieces 20 arranged side by side on the conveyor roller 31, and after the predetermined time has elapsed, conveys the other workpiece 20 by the arm unit. This is an intermittent feeding device that is placed on the conveyor roller 31, placed on the conveyor roller 31 by being pressed by the pressing portion, or placed on the conveyor roller 31 by releasing the engagement of the stopper portion. As a result, the workpiece 20 is placed on the rotary conveyance unit 30 so that a gap is formed between the one workpiece 20 and the other workpiece 20, so that in addition to the side surface of the workpiece 20, the end surface is also uniform. Blasting can be applied.

  The shot blasting apparatus 1 having the above-described configuration causes the workpiece 20 intermittently placed on the conveyor roller 31 by the intermittent feeding unit 60 to be conveyed in the workpiece conveyance direction while rotating around the axis by the conveyor roller 31. Then, it is carried into the projection chamber 11a from the carry-in part 12 of the cabinet 11. Next, the shot blasting apparatus 1 projects a projection material onto the workpiece 20 by the projection unit 50. At this time, the conveyor roller 31 is formed in a drum shape (V shape), and the axis direction of the conveyor roller 31 is provided so as to be inclined with respect to the workpiece conveying direction. Thus, the workpiece 20 is conveyed in the workpiece conveyance direction while being rotated around the axis, and thus the surface processing (blasting) of the workpiece 20 is uniformly performed over the entire circumference. Next, the workpiece 20 onto which the projecting material has been projected is unloaded through the unloading unit 13 of the cabinet 11.

  As described above, in the shot blasting apparatus 1, the work 20 placed on the conveyor roller 31 is carried into the projection chamber 11 a from the carry-in unit 12 by the conveyor roller 31, and the carry-out unit from the carry-in unit 12 in the projection chamber 11 a. 13 and then carried out from the carry-out unit 13 to the outside. Therefore, the shot blasting apparatus 1 can inline the blasting process because the place where the workpiece 20 enters the projection chamber 11a and the place where the work 20 exits are different. Further, since the shot blasting apparatus 1 can set the workpiece 20 continuously, the blasting process can be performed continuously and the workability is good.

  Further, the shot blasting apparatus 1 is provided such that the conveyor roller 31 is formed in a drum shape (V shape), and the axial direction of the conveyor roller 31 is inclined with respect to the workpiece conveying direction. Therefore, the shot blasting apparatus 1 can convey the workpiece 20 in the workpiece conveyance direction while rotating around the axis of the workpiece 20 by the conveyor roller 31, and the workpiece 20 can be uniformly distributed over the entire circumference. Surface processing (blasting) can be performed.

  Further, in the shot blasting apparatus 1, the first conveyor roller group 31a arranged at odd numbers in the workpiece conveyance direction is driven by the first drive mechanism 32 provided on one end side in the workpiece conveyance width direction, and the workpiece conveyance is performed. The second conveyor roller group 31b arranged in the even-numbered direction is driven by the second drive mechanism 33 provided on the other end side in the workpiece conveyance width direction. Accordingly, the shot blasting apparatus 1 is configured such that the conveyor roller is disposed between the conveyor rollers 31 and 31 in the workpiece conveyance direction, as compared with the case where the conveyor roller is driven only by a driving mechanism provided on one end side or the other end side in the workpiece conveyance width direction. The gap (arrangement interval) can be reduced, and the blasting process can be applied to the workpiece 20 having a shorter length.

  Specifically, when the conveyor roller is driven only by a drive mechanism provided on one end side or the other end side in the workpiece conveyance width direction, the minimum of the first conveyor roller and the second conveyor roller is minimum. It is assumed that an arrangement interval of 180 mm is necessary in consideration of the outer diameter of the first sprocket, the outer diameter of the second sprocket, the transfer of the roller chain, and the like. When this is applied to the shot blasting apparatus 1 of the present invention, the minimum arrangement interval between the odd-numbered conveyor rollers 31, 31 such as the first conveyor roller 31 and the third conveyor roller 31, and the second conveyor roller 31 The minimum arrangement interval between even-numbered conveyor rollers 31, 31 such as the fourth conveyor roller 31 is 180 mm. However, the shot blasting apparatus 1 according to the present invention has a drive mechanism for the odd-numbered conveyor rollers 31 and the even-numbered conveyor rollers 31 and is provided separately on one end side and the other end side in the workpiece conveyance width direction. An even-numbered conveyor roller 31 may be disposed between odd-numbered conveyor rollers 31, 31 such as a second conveyor roller 31 disposed between the first conveyor roller 31 and the third conveyor roller 31. Therefore, the minimum arrangement interval between the conveyor rollers 31 in the workpiece conveyance direction can be set to 90 mm, which is a half. In other words, the shot blasting apparatus 1 is configured such that the conveyor roller is disposed between the conveyor rollers 31 and 31 in the workpiece conveyance direction, rather than the case where the conveyor roller is driven only by a driving mechanism provided on one end side or the other end side in the workpiece conveyance width direction. The arrangement interval (gap) can be reduced, and specifically, the conveyor rollers 31 can be arranged at substantially half intervals. Therefore, the shot blasting apparatus 1 is capable of blasting a workpiece 20 having a shorter length than when the conveyor roller is driven only by a driving mechanism provided on one end side or the other end side in the workpiece conveyance width direction. Processing can be performed.

  Further, the shot blasting apparatus 1 intermittently feeds the workpiece 20 to the upstream side of the rotary conveyance unit 30 with a gap between the workpieces, with the intermittent feeding unit 60 providing a gap between the workpieces. In addition, the end face can be uniformly blasted.

  Further, in the shot blasting apparatus 1, a total of two projection units 50 are respectively arranged on the upstream side and the downstream side in the workpiece conveyance direction in the cabinet 11, and the upstream side and the downstream side in the workpiece conveyance direction with respect to the workpiece 20. Since the projection material is projected from the side, in addition to the side surface of the work 20, the end surface can be uniformly blasted.

  Further, since the shot blasting apparatus 1 has a plurality of concave groove-like engaging portions formed at predetermined intervals around the axis along the axial direction on the surface of the conveyor roller 31, the rotation and progress of the workpiece 20. It is possible to improve the performance.

  In the shot blasting apparatus 1, the number of conveyor rollers 31 is not limited to 30 and can be changed as appropriate.

  Further, the shot blasting apparatus 1 is configured such that the first motor 36 is installed on the downstream side at one end side in the workpiece conveyance width direction, and is connected to the odd-numbered conveyor roller 31 on the most downstream side via the roller chain 39. Alternatively, the second motor 40 may be installed on the upstream side on the other end side in the workpiece conveyance width direction so as to be connected to the even-numbered conveyor roller 31 on the most upstream side via the roller chain 39. Also good. Further, the shot blasting apparatus 1 has the first motor 36 installed on the upstream side or the downstream side on the other end side in the workpiece conveyance width direction, and the second motor 40 is installed on the upstream side on the one end side in the workpiece conveyance width direction. You may make it install in the downstream.

  Furthermore, the shot blasting device 1 is not limited to the engagement portion provided on the surface of the conveyor roller 31 being formed in a concave groove shape, and may be formed in a convex shape. Even in such a case, the shot blasting device 1 can improve the rotational property and progress of the workpiece 20 by the engaging portion.

  Furthermore, the shot blasting apparatus 1 is not limited to conveying the workpiece 20 in the workpiece conveyance direction while rotating the workpiece 20 around the axis of the workpiece 20 by the conveyor roller 31 formed in a drum shape (V shape). The workpiece 20 placed on the trough is caused to vibrate by a vibration conveyor provided with a long member (trough) formed in a U-shape (cane shape) so as to vibrate, thereby rotating around the axis of the workpiece 20. It is also possible to convey the workpiece in the workpiece conveyance direction. Even in such a case, the shot blasting apparatus 1 can perform surface processing (blasting) uniformly on the workpiece 20 without any unevenness over the entire circumference. Further, since there is no gap between the conveyor rollers 31 and 31 as in the case of a roller conveyor, blasting can be performed even on a small work 20 having a shorter length in the axial direction.

  Furthermore, the workpiece 20 is not limited to being a round bar, but can be conveyed in the workpiece conveyance direction while being rotated about the axis of the workpiece 20 by the rotation conveyance unit 30. Any shape such as a polygonal bar may be used.

DESCRIPTION OF SYMBOLS 1 Shot blasting apparatus, 10 Base member, 11 Cabinet, 11a Projection chamber, 12 Carry-in part, 13 Carry-out part, 20 Work, 30 Rotation conveyance part, 31 Conveyor roller, 31a 1st conveyor roller group, 31b 2nd conveyor roller Group, 32 first drive mechanism, 33 second drive mechanism, 34 output shaft, 35 conveyor base, 36 first motor, 37 first sprocket, 38 second sprocket, 39 roller chain, 40 second Motor, 41 first sprocket, 42 second sprocket, 43 roller chain, 50 projection unit

Claims (5)

A rotary conveying unit that conveys the rod-shaped workpiece in the axial direction of the workpiece while rotating about the axis of the workpiece;
A projection unit that projects the projection material onto the workpiece that is being conveyed in the axial direction of the workpiece while being rotated about the axis of the workpiece by the rotary conveyance unit, and that performs a blasting process uniformly on the workpiece; A shot blasting device. The rotary conveying unit is a V-shaped conveyor roller that gradually decreases in diameter from the both end sides in the axial direction toward the central side and the central portion in the axial direction is constricted.
A plurality of the conveyor rollers are arranged at a predetermined interval along the conveying direction of the workpiece, and the axial direction is inclined with respect to the conveying direction of the workpiece. Item 4. The shot blasting apparatus according to item 1. A first conveyor roller group arranged at an odd number among the plurality of conveyor rollers is driven by a first drive mechanism installed on one end side in the conveyance width direction substantially orthogonal to the workpiece conveyance direction. ,
A second conveyor roller group arranged at an even number among the plurality of conveyor rollers is driven by a second drive mechanism installed on the other end side in the conveyance width direction substantially orthogonal to the workpiece conveyance direction. The shot blasting apparatus according to claim 2, wherein:   The shot blasting apparatus according to claim 1, further comprising an intermittent feeding unit that intermittently feeds the work to the rotary conveyance unit.   The shot blasting device according to any one of claims 1 to 4, wherein the projection unit projects from two front and rear directions of the workpiece conveying direction.

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