Shot processing device and shot processing method

Patent metadata

Field	Value
Publication number	US-11344995-B2
Application number	US-201816762977-A
Country	US
Kind code	B2
Filing date	Oct 10, 2018
Priority date	Nov 30, 2017
Publication date	May 31, 2022
Grant date	May 31, 2022

Abstract

A shot processing device according to an aspect includes: a guide portion provided in a conveyance direction of a workpiece; a rotation mechanism which includes a first endless belt providing a placement surface having the workpiece placed thereon and a first drive unit driving the first endless belt so that the placement surface moves in a direction opposite to the conveyance direction; a conveyance mechanism which pushes the workpiece toward the conveyance direction so that the workpiece on the placement surface rolls and moves in the conveyance direction along the guide portion; and at least one projector which projects shot media to the workpiece rolling and moving on the placement surface.

First claim

The invention claimed is:

1. A shot processing device comprising:
a guide portion to form a conveyance path extending in a conveyance direction of a workpiece, the workpiece having a disk shape or a cylindrical shape;
a rotation mechanism which includes a first endless belt providing a placement surface having the workpiece placed thereon and a first drive unit driving the first endless belt so that the placement surface moves in a direction opposite to the conveyance direction;
a conveyance mechanism which pushes the workpiece toward the conveyance direction so that the workpiece on the placement surface rolls and moves in the conveyance direction along the guide portion; and
at least one projector which projects shot media to the workpiece rolling and moving on the placement surface,
wherein the guide portion includes a pair of upper guide rails extending in the conveyance direction and spaced apart from each other along the conveyance path, and
wherein the at least one projector includes an upper projector that is provided above the conveyance path and projects the shot media toward an outer peripheral portion of the workpiece exposed from between the pair of upper guide rails.

2. The shot processing device according to claim 1 ,
wherein the guide portion is configured to support the workpiece while inclining the workpiece in a direction perpendicular to the conveyance direction and a vertical direction.

3. The shot processing device according to claim 1 ,
wherein the first endless belt includes a plurality of steel plate-shaped members.

4. The shot processing device according to claim 3 ,
wherein each of the plurality of plate-shaped members includes a surface inclined with respect to a horizontal plane in a direction perpendicular to the conveyance direction and the vertical direction.

5. The shot processing device according to claim 1 , further comprising:
an unloading chamber to unload the workpiece,
wherein the unloading chamber is provided with an abutting portion which is movable in a direction perpendicular to the conveyance direction and the vertical direction and is able to contact an upper portion of the workpiece disposed in the unloading chamber from a lateral side and a movement mechanism which moves the abutting portion in a direction perpendicular to the conveyance direction and the vertical direction.

6. The shot processing device according to claim 1 ,
wherein the conveyance mechanism includes a second endless belt which is provided above the placement surface, a second drive unit which drives the second endless belt, and a plurality of pushing portions which are arranged along an outer peripheral surface of the second endless belt, and
wherein each of the plurality of pushing portions extends downward from the second endless belt so as to contact the workpiece and pushes the workpiece in the conveyance direction in response to the driving of the second endless belt so that the workpiece is conveyed toward the conveyance direction.

7. The shot processing device according to claim 6 , further comprising:
a loading mechanism which is provided on the upstream side of the conveyance direction in relation to the placement surface and loads the workpiece onto the placement surface at a predetermined cycle; and
a control device which adjusts a drive speed of the second endless belt so that one pushing portion of the plurality of pushing portions is disposed at a position in which the workpiece loaded onto the placement surface is able to be pushed in the conveyance direction in accordance with a timing in which the workpiece is loaded onto the placement surface.

8. The shot processing device according to claim 6 , wherein the second endless belt is wound around a pair of sprockets, each of the pair of sprockets to rotate around an axis extending in a vertical direction.

9. The shot processing device according to claim 1 ,
wherein each of the pair of upper guide rails has a contact surface in contact with the workpiece conveyed along the conveyance path, and the contact surface of one of the pair of upper guide rails is inclined with respect to the contact surface of the other of the pair of upper guide rails in a cross-sectional view orthogonal to the conveying direction.

10. The shot processing device according to claim 1 ,
wherein the guide portion further includes a pair of lower guide rails extending along the conveyance direction, and
wherein the pair of lower guide rails are arranged to be separated downward from the pair of upper guide rails and to be spaced apart from each other along the conveyance path.

11. The shot processing device according to claim 1 ,
wherein the conveyance mechanism includes a second endless belt provided above the placement surface, a second drive unit to drive the second endless belt, and a plurality of pushing portions arranged along an outer peripheral surface of the second endless belt, and
wherein each of the plurality of pushing portions extends from the second endless belt to the conveyance path through between the pair of upper guide rails so as to contact the workpiece, and moves in the conveyance direction along between the pair of upper guide rails in response to the drive of the second endless belt to convey the workpiece in the conveyance direction.

12. A shot processing method of projecting shot media to a workpiece using a shot processing device,
wherein the shot processing device includes a guide portion to form a conveyance path extending in a conveyance direction of the workpiece, the workpiece having a disk shape or a cylindrical shape, a rotation mechanism which includes an endless belt providing a placement surface having the workpiece placed thereon and a drive unit driving the endless belt, a conveyance mechanism which conveys the workpiece toward the conveyance direction, and at least one projector which projects shot media to the workpiece,
wherein the guide portion includes a pair of upper guide rails extending in the conveyance direction and spaced apart from each other along the conveyance path, and
wherein the at least one projector includes an upper projector that is provided above the conveyance path,
wherein the shot processing method comprises:
driving the endless belt so that the placement surface moves in a direction opposite to the conveyance direction;
pushing the workpiece toward the conveyance direction by the conveyance mechanism so that the workpiece on the placement surface rolls and moves in the conveyance direction along the guide portion; and
projecting the shot media from the upper projector toward an outer peripheral portion of the workpiece exposed from between the pair of upper guide rails while the workpiece rolls and moves in the conveyance direction.

13. The shot processing method according to claim 12 , wherein the workpiece is rolled and moved along the guide portion in the conveyance direction in a state where the workpiece is inclined in a direction perpendicular to the conveyance direction and a vertical direction.

14. The shot processing method according to claim 12 , wherein
the conveyance mechanism includes a second endless belt provided above the placement surface, a second drive unit to drive the second endless belt, and a plurality of pushing portions arranged along an outer peripheral surface of the second endless belt, and
each of the plurality of pushing portions extends from the second endless belt to the conveyance path through between the pair of upper guide rails, and
the plurality of pushing portions moves in the conveyance direction along between the pair of upper guide rails to ro

Assignees

• Sintokogio Ltd

Inventors

• Matsumoto Masato

Classifications

• B24C3/32

  designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks (B24C3/08, B24C3/18 take precedence) · CPC title

• B24C3/14

  Apparatus using impellers · CPC title

• B24C3/04

  stationary · CPC title

• B24C1/10 Primary

  for compacting surfaces, e.g. shot-peening (for deforming sheet metal, tubes or profiles B21D31/06; as a metallurgical treatment C21D7/00, C22F1/00) · CPC title

• B24C9/00

  Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material · CPC title