Shot blasting device

Abstract

The present invention provides a shot peening apparatus (10) comprising: a treatment tank (11); a worktable (21); a moving part (49) comprising: a nozzle moving device (50); a sleeve (52); a first head (53) having a mounting hole (53a) and disposed at the front end of the sleeve (52); a motor (54); and a first spindle (58) exposed from the mounting hole (53a); a nozzle head (61) separable from the moving part (49) and having; having a mounting hole (53a) 53a) The second head (65) of the connecting port (65a) connected to the first main shaft (58); the second main shaft (76); the nozzle (90) disposed below the second main shaft (76); the nozzle flow path (87) that penetrates the interior of the second main shaft (76) and is connected to the nozzle (90) and has an opening at the upper end of the second main shaft (76); and the rotary joint (81) disposed at the upper end of the second main shaft (76) and connected to the nozzle flow path (87).

Description

Technical Field

[0001] This invention relates to a shot peening device. Background Technology

[0002] A method for improving the surface roughness of metal samples manufactured by additive manufacturing was proposed (H. Soyama and D. Sanders, Use of an Abrasive Water Cavitating Jet and Peening Process to Improve the Fatigue Strength of Titanium Alloy 6Al-4V Manufactured by the Electron Beam Powder Bed Melting (EBPB) Additive Manufacturing Method, JOM 71(12), 4311-4318(2019), hereinafter referred to as Non-Patent Document 1). In the method of Non-Patent Document 1, the sample is fixed in a tank containing abrasive material and water. Then, water pressurized by a plunger pump is sprayed onto the sample from a nozzle immersed in the tank and directed downwards. This reduces the residual stress on the sample surface. Summary of the Invention

[0003] The purpose of this invention is to provide a shot peening device that can perform metal surface treatment methods and is easy to maintain.

[0004] The first aspect of this invention is a shot peening device, comprising:

[0005] A processing tank having an opening at the top, storing abrasive particles and a processing liquid, and fluidizing the abrasive particles through the processing liquid;

[0006] A worktable, which is disposed within the processing tank and holds the workpiece;

[0007] The moving part has:

[0008] Nozzle moving device;

[0009] A sleeve, the sleeve being disposed on the nozzle moving device;

[0010] A first head, having a mounting hole, is disposed at the front end of the sleeve;

[0011] The motor is disposed at the base end of the sleeve; and

[0012] A first spindle, connected to the motor and protruding from the mounting hole, is rotatably disposed within the first head about a vertical axis; and

[0013] A nozzle head, which is separable from the moving part, and has the following features:

[0014] The second head has a connection port that connects to the mounting hole and is disposed on the first head;

[0015] A connecting shaft, which is disposed within the second head and connected to the first spindle via the connecting port;

[0016] A second spindle, which is connected to the connecting shaft, is rotatably disposed within the second head about a vertical axis;

[0017] A nozzle, the nozzle being disposed below the second spindle;

[0018] A nozzle flow path, which penetrates the interior of the second main shaft and is connected to the nozzle, and has an opening at the upper end of the second main shaft; and

[0019] A rotary joint is disposed at the upper end of the second spindle and connected to the nozzle flow path.

[0020] A sleeve is a feed table with a circular or rectangular cross-section.

[0021] The shot peening device can also be further equipped with a shroud to suppress the dispersion of abrasive particles and processing fluid.

[0022] The cover includes a telescopic cover. The telescopic cover is, for example, a pleated cover or a corrugated cover. A sleeve is configured to pass through the cover. Preferably, viewed from the processing tank, the motor is located outside the cover.

[0023] The shot peening device may also have a drive shaft disposed along the inside of a sleeve and connected to a motor. A first bevel gear is connected to the drive shaft. Preferably, the motor is a servo motor or a stepper motor.

[0024] The connecting shaft is coaxially arranged with the first main shaft. The second main shaft is parallel to the connecting shaft and offset from it. The second main shaft is, for example, located in the front end direction of the connecting shaft. The driving pulley and driven pulley are preferably toothed pulleys. The annular belt is preferably a toothed belt.

[0025] The cylinder can be, for example, a pneumatic cylinder or an electric cylinder. The lifting device may also include a linear motion guide. The linear motion guide is, for example, a combination of a guide bushing and a guide shaft. The guide shaft slides within the guide bushing. The guide bushing is positioned above the processing tank. Preferably, the guide bushing is positioned above the liquid surface. The linear motion guide can be, for example, a ball spline or a linear guide.

[0026] When the lifting device raises or lowers the worktable, the guide is guided by the guide rail, and the rotation of the worktable is restricted. When the worktable reaches the lowered position, the central axes of the first and second axes are aligned. When the worktable reaches the lowered position, the worktable, the second support, and the first support can rotate as a whole.

[0027] The table rotation mechanism consists of a cylinder and a motor. The table rotation mechanism can also include a rotary cam. The table rotation axis can pass through the side wall of the processing tank.

[0028] The guide element is, for example, a cam follower. The guide rail has, for example, a guide groove for the rotation of the cam follower. Alternatively, the guide element can also be a slider that slides on the guide rail. Preferably, the guide element is guided to the guide rail when the pin disengages from the pin hole.

[0029] The second support is located at the lower end of the support column. The lifting device allows the second housing, driven shaft, second support, and worktable to be raised and lowered as a single unit. The second shaft can also be rotatably mounted on the second housing. The second support is mounted on the second shaft.

[0030] Preferably, the lower end of the guide rail is positioned above the liquid level in the treatment tank.

[0031] Preferably, the treatment tank has an overflow port at the top. In this case, the liquid level of the treatment liquid in the treatment tank is determined by the height of the overflow port. Preferably, the treatment tank has a first reversing portion and a second reversing portion. The first reversing portion surrounds the upper end of the treatment tank and extends inside the treatment tank. Preferably, the first reversing portion surrounds the entire circumference of the treatment tank. The first reversing portion extends horizontally. The second reversing portion is disposed at the front end of the first reversing portion and extends downward. Preferably, the second reversing portion surrounds the entire inner circumference of the first reversing portion.

[0032] The shot peening apparatus according to the present invention is capable of performing metal surface treatment methods and is easy to maintain. Attached Figure Description

[0033] Figure 1 This is a cross-sectional view of the shot peening apparatus according to the first embodiment.

[0034] Figure 2 yes Figure 1 Part II of the series.

[0035] Figure 3 yes Figure 1Sectional view of line III-III.

[0036] Figure 4 This is a variation of the nozzle block in the first embodiment.

[0037] Figure 5 This is a perspective view of the shot peening apparatus according to the second embodiment.

[0038] Figure 6 This is a cross-sectional view of the shot peening device according to the second embodiment.

[0039] Figure 7 yes Figure 6 Sectional view along line VII-VII.

[0040] Figure 8 This is a cross-sectional view of the shot peening device according to the second embodiment.

[0041] Symbol Explanation

[0042] 10, 100 shot peening equipment

[0043] 11 Processing tank

[0044] Workbench 21, 121

[0045] 49. Mobile Department

[0046] 50 Nozzle Moving Device

[0047] 52 Sleeve

[0048] 53 First Head

[0049] 54 First Motor

[0050] 58 First spindle

[0051] 61 Nozzle head

[0052] 65 Second head

[0053] 66 Connecting shaft

[0054] 76 Second Main Axis

[0055] 81 Rotary Joint

[0056] 87 Nozzle Flow Path

[0057] 90 nozzle Detailed Implementation

[0058] (First Implementation)

[0059] like Figure 1 as well as Figure 3As shown, the shot peening apparatus 10 of this embodiment includes: a treatment tank 11, a dispersion chamber 12, a flow nozzle 14, a worktable 21, a cover 63, a moving part 49, and a nozzle head 61. The shot peening apparatus 10 may also include: a tank 94, a first pump 96, a second pump 95, and a lifting device 19. Here, Figure 1 This indicates that the lifting device 19 has positioned the worktable 21 in the lowered position.

[0060] The treatment tank 11 includes: a main body (trunk) 11a, an enlarged section 11b, an overflow port 11c, a first reversing section 11d, and a second reversing section 11e. The main body 11a is cylindrical and has a rectangular or circular cross-section. The enlarged section 11b has a larger cross-section than the main body 11a. The enlarged section 11b is positioned above the main body 11a. In the transition region from the main body 11a to the enlarged section 11b, the cross-section gradually widens. The overflow port 11c is positioned above the enlarged section 11b. The height of the overflow port 11c is determined by the height of the liquid level 15 of the treatment liquid 4.

[0061] The first fold-back portion 11d is disposed at the upper end of the processing groove 11 and surrounds the entire inner circumference of the processing groove 11. The first fold-back portion 11d is a flat plate disposed on a horizontal plane. The second fold-back portion 11e is disposed at the inner end of the first fold-back portion 11d and extends downward toward the first fold-back portion 11d. The second fold-back portion 11e is disposed around the entire inner circumference of the first fold-back portion 11d.

[0062] The dispersion chamber 12 is disposed below the processing tank 11. The dispersion chamber 12 may also be disposed inside the lower part of the processing tank 11. The dispersion chamber 12 has a dispersion plate 13a on its upper surface (see reference). Figure 2 The dispersion plate 13a has a plurality of nozzle holes 13b. The nozzle holes 13b are arranged, for example, in a grid pattern or an interlaced grid pattern. Each nozzle hole 13b has an internal thread. A flow nozzle 14 is disposed on each nozzle hole 13b. Preferably, a recess 13c is disposed around each nozzle hole 13b.

[0063] like Figure 2 As shown, the flow nozzle 14 has a body 14a, a flow inlet 14b, a mixing chamber 14d, an internal nozzle 14c, a nozzle outlet 14e, multiple particle intake ports 14f, and mounting threads 14g. Figure 2 This is a longitudinal cross-sectional view of the flow nozzle 14 through the center plane of the main body 14a and the particle inlet 14f. The main body 14a is cylindrical, and the front end may be slightly thinner. The mounting thread 14g is an external thread. The mounting thread 14g is screwed into the nozzle hole 13b.

[0064] The inlet 14b is located at the lower end of the main body 14a. The outlet 14e is located at the upper end of the main body 14a. The outlet 14e can be arranged facing upwards. The outlet 14e can also be arranged facing to the side or downwards. The mixing chamber 14d extends vertically in the center of the main body 14a and is connected to the outlet 14e.

[0065] An internal nozzle 14c is disposed at the lower part of the main body 14a and connected to the inlet 14b. The internal nozzle 14c is disposed at the lower end of the mixing chamber 14d and opens toward the mixing chamber 14d. A plurality of particle intake ports 14f are evenly arranged circumferentially on the side of the lower part of the main body 14a. The particle intake ports 14f are inclined upwards and inwards from the radial direction of the main body 14a. The particle intake ports 14f connect to the lower part of the mixing chamber 14d from inside the recess 13c.

[0066] like Figure 1 As shown, the worktable 21 is located at the lower part of the processing tank 11. The worktable 21 may also have a pin 22. The pin 22 is erected upwards from the worktable 21. The workpiece 3 is placed on the pin 22. Here, there is a depth 28 from the liquid surface 15 to the lower surface of the workpiece 3.

[0067] The lifting device 19 has a lifting bracket 23 and a cylinder 24. The lifting device 19 may also have a guide shaft 25 and a guide bushing 27. The lifting bracket 23 has a support column 23a and a connecting plate 23b.

[0068] A support column 23a is positioned above the worktable 21. Preferably, the support column 23a extends above the upper end of the processing tank 11. A connecting plate 23b is connected to the upper end of the support column 23a and extends laterally to the side of the processing tank 11. A cylinder 24 is disposed on the side of the processing tank 11 and connected to the connecting plate 23b. The cylinder 24 extends and retracts, causing the worktable 21 to move vertically between a raised position and a lowered position. In the raised position, the worktable 21 is at substantially the same height as or above the liquid surface 15. In the lowered position, the worktable 21 is at the bottom of the processing tank 11.

[0069] like Figure 3 As shown, the moving part 49 includes: a nozzle moving device 50, a sleeve 52, a motor 54, a first head 53, and a first main shaft 58. The moving part 49 may also include a drive shaft 56, a first bevel gear 57, a second bevel gear 60, and bearings 55 and 59.

[0070] Cover 63 covers the perimeter of the processing tank 11. Cover 63 has a telescopic design. Figure 3As shown, the sleeve 52 extends through the cover 63 in the front-to-back direction. The sleeve 52 is disposed on the nozzle moving device 50. Viewed from the processing tank 11, the nozzle moving device 50 is disposed on the outside of the cover 63. The nozzle moving device 50 is, for example, a moving column. The nozzle moving device 50 allows the sleeve 52 to move freely in the left-to-right (X), front-to-back (Y), and up-down (Z) directions.

[0071] Motor 54 is disposed at the base end of sleeve 52. Viewed from processing groove 11, motor 54 is disposed on the outside of cover 63. First head 53 is disposed at the front end of sleeve 52. First head 53 is disposed on the inside of cover 63. First head 53 has a mounting hole 53a at its upper part.

[0072] The drive shaft 56 is supported by the bearing 55 inside the sleeve 52. The drive shaft 56 extends in the front-rear direction. The base end of the drive shaft 56 is connected to the motor 54. The first bevel gear 57 is fastened to the front end of the drive shaft 56 inside the first head 53.

[0073] The first spindle 58 is supported by a bearing 59 inside the first head 53. The first spindle 58 extends in the vertical direction. A second bevel gear 60 is fastened to the first spindle 58 and meshes with the first bevel gear 57. The upper end of the first spindle 58 is configured to face the mounting hole 53a. The first spindle 58 has a first keyway 58a on its upper end face.

[0074] The nozzle head 61 has: a second head 65, a connecting shaft 66, a second main shaft 76, a nozzle 90, a nozzle flow path 87, and a rotary joint 81. The nozzle head 61 may also have: a key 68, a driving pulley 69, a driven pulley 70, an annular belt 71, a sleeve joint 83, a nozzle holder 88, and bearings 67 and 77.

[0075] The second head 65 has a connection port 65a. The second head 65 is positioned above the first head 53. The second head 65 extends forward of the first head 53. The second head 65 may also have a spindle housing 75.

[0076] The connector 65a is positioned below the second head 65 and connects to the mounting hole 53a. The connector 65a can also be inserted into the mounting hole 53a. Preferably, the second head 65 can be positioned on the first head 53 by a pin or the like.

[0077] The spindle housing 75 is positioned in front of the first head 53. The spindle housing 75 extends downward from the second head 65. The lower end of the spindle housing 75 extends to substantially the same height as or further below the lower end of the first head 53.

[0078] The connecting shaft 66 is supported by a bearing 67 inside the second head 65. The connecting shaft 66 is coaxially configured with the first spindle 58. The connecting shaft 66 has a second keyway 66a at its lower end.

[0079] Key 68 is fastened to the second keyway 66a. Key 68 is inserted into the first keyway 58a and connects the first spindle 58 and the connecting shaft 66. Key 68 is, for example, a parallel key or a crescent key. Alternatively, key 68 can also be fastened to the first keyway 58a.

[0080] The second spindle 76 passes through the second head 65 and the spindle housing 75, and is supported by the bearing 77. The second spindle 76 extends in the vertical direction. The lower end of the second spindle 76 is at the same height as the lower end of the first head 53, or extends further downward than the lower end of the first head 53.

[0081] The driving pulley 69 is fastened to the connecting shaft 66. The driven pulley 70 is fastened to the second main shaft 76. The annular belt 71 is mounted between the driving pulley 69 and the driven pulley 70. The driving pulley 69, the driven pulley 70, the annular belt 71, and the bearings 77 are housed in the second head 65.

[0082] A rotary joint 81 is positioned above the second spindle 76. The rotary joint 81 includes a rotating housing 85, a bearing 84, and a rotating shaft 82. The rotating shaft 82 is supported by the bearing 84 inside the rotating housing 85. The rotating shaft 82 is connected to the upper end of the second spindle 76. The rotating housing 85 restricts its rotation.

[0083] The nozzle holder 88 is disposed below the second spindle 76. The nozzle holder 88 extends relatively long in the vertical direction. The nozzle 90 is disposed at the lower end of the nozzle holder 88 facing horizontally.

[0084] The nozzle flow path 87 passes through the nozzle holder 88 and the second spindle 76. The nozzle flow path 87 extends in the vertical direction. The nozzle flow path 87 is bent at a right angle at the lower end of the nozzle holder 88 and connects to the nozzle 90.

[0085] The rotating shaft 82, the second main shaft 76, the nozzle holder 88, and the nozzle 90 are connected by a sleeve joint 83. The sleeve joint 83 has a sleeve 89, a fastening joint 86, and a pair of collar mounting holes 93.

[0086] The sleeve 89 is a hollow cylinder with pointed ends. The sleeve 89 has an outer cylindrical surface 89a and a conical surface 89b. The conical surface 89b is located at both ends of the outer cylindrical surface 89a. Fluid flows inside the sleeve 89. The sleeve 89 forms part of the nozzle flow path 87. The fastening joint 86 is a flanged, threaded component.

[0087] The collar mounting hole 93 has an inner cylindrical surface 93a and a conical surface 93b. The collar mounting hole 93 is respectively disposed at both ends of the two connected components. The inner cylindrical surface 93a is in contact with the outer cylindrical surface 89a. The conical surface 93b may also have a slightly larger apex angle than the conical surface 89b.

[0088] The sleeve 89 is inserted between the two collar mounting holes 93. When the components on both sides are tightened by the fastening joint 86, the conical surface 89b contacts the conical surface 93b and is pressed and deformed. This seals the gap between the two components.

[0089] In addition, the sleeve 89 can also be integrally formed with a component.

[0090] The nozzle 90 can also be integrally formed with the sleeve 89. The nozzle 90 has an orifice 90a and a liquid guiding passage 90b. Preferably, the liquid guiding passage 90b has a length of 5 to 8 times the inner diameter of the orifice 90a. The liquid guiding passage 90b connects the nozzle flow path 87 and the orifice 90a. The nozzle 90 is screwed into and fixed to the nozzle holder 88. The nozzle 90 is a straight spray nozzle or a flat spray nozzle. The axial length 97 of the nozzle 90 and the nozzle holder 88 is smaller than the gap 29 between the workpiece 3 and the lifting device 19.

[0091] Reference Figure 1 Tank 94 stores the processing liquid 4. Tank 94 has a settling tank. Tank 94 separates the abrasive particles 5 from the processing liquid 4 returned from the processing tank 11.

[0092] Pump 95 is, for example, a centrifugal pump or a diaphragm pump. Pump 95 delivers the treatment liquid 4 to the dispersion chamber 12. The discharge pressure of pump 95 is, for example, 0.3 to 0.7 MPa.

[0093] Treatment fluid 4 is sprayed from flow nozzle 14. (Refer to...) Figure 2 The treatment liquid 4 is sprayed into the mixing chamber 14d from the internal nozzle 14c. The pressure around the internal nozzle 14c decreases, drawing in the treatment liquid 4 from the bottom of the treatment tank 11 through the particle intake port 14f. At this time, as the treatment liquid 4 flows, the abrasive particles 5 floating inside and around the recess 13c flow into the mixing chamber 14d from the particle intake port 14f. The treatment liquid flowing into the particle intake port 14f, the abrasive particles 5, and the jet of treatment liquid 4 sprayed from the internal nozzle 14c mix and are ejected from the outlet 14e. The abrasive particles 5 are fluidized by being stirred by the treatment liquid 4. The abrasive particles 5 remain suspended at the bottom of the treatment tank 11. The treatment liquid 4 rises within the treatment tank 11, is discharged from the overflow port 11c, and returns to the tank 94.

[0094] Pump 96 is a piston pump. Pump 96 is connected to the rotating housing 85. Pump 96 delivers the processing liquid 4 to nozzle 90 via rotary joint 81 and nozzle flow path 87. The ejection pressure of pump 96 is, for example, 100 MPa to 245 MPa. The processing liquid 4 is sprayed from nozzle 90 into the processing tank 11. The processing liquid 4 ejected from nozzle 90 creates cavitation in the processing tank 11. The created cavities move with the jet of processing liquid 4 and collide with workpiece 3. The cavities compress the surface of workpiece 3, generating residual stress. In addition, the jet of processing liquid 4 entrains abrasive particles 5 suspended at the bottom of the processing tank 11, causing them to collide with the surface of workpiece 3. The abrasive particles 5 abrade the surface of workpiece 3.

[0095] The nozzle head 61 can also have Figure 4 The nozzle holder 91 is shown. The nozzle holder 91 allows the nozzle 90 to be mounted downwards along the extension of the second spindle 76. The other structures of the nozzle holder 91 are substantially the same as those of the nozzle holder 88. The nozzle holder 91 is interchangeable with the nozzle holder 88.

[0096] In this embodiment, the second head 65 can be detached from the first head 53. Therefore, the moving part 49 can be separated from the nozzle head 61. The nozzle head 61 is exposed to the high-pressure processing liquid 4, abrasive particles 5, and the jet of processing liquid 4, and is therefore prone to wear. By separating the nozzle head 61 from the moving part 49, the easily worn nozzle head 61 can be easily maintained.

[0097] Furthermore, the second head 65 is positioned above the first head 53. Therefore, there are no components below the first head 53 that would obstruct the area around the nozzle holder 88 and the nozzle 90. This allows for a wider range of movement of the nozzle 90. Also, the connection between the second head 65 and the first head 53 is located above, thus preventing damage to the connection due to the processing fluid 4 and abrasive particles 5.

[0098] The second spindle 76 is offset from the connecting shaft 66 via a belt mechanism (driving pulley 69, driven pulley 70, and annular belt 71). Therefore, the second spindle 76 can be positioned in front of or to the side of the first head 53. Furthermore, compared to a structure where the second spindle 76 is directly connected to the lower part of the first spindle 58, the lower end of the second spindle 76 can be positioned higher. The lower end of the second spindle 76 is substantially lower than the lower end of the first head 53. Therefore, when the nozzle moving device 50 lowers the second spindle 76 to near the liquid surface 15, the first head 53 is also positioned above the liquid surface 15. Thus, damage to the moving part 49 due to the processing liquid 4 and abrasive particles 5 can be suppressed.

[0099] The first spindle 58 protrudes from the mounting hole 53a. Therefore, when the second head 65 is removed from the first head 53, the key 68 and the first keyway 58a are exposed from the mounting hole 53a. Thus, the operator can measure the parallelism between the key 68, the first keyway 58a (first spindle 58) and the nozzle moving device 50, and the parallelism between the key 68, the first keyway 58a (first spindle 58) and the worktable 21. Furthermore, the operator can measure and adjust the backlash between the first bevel gear 57 and the second bevel gear 60.

[0100] The length 92 from the upper end of the nozzle holder 88 to the nozzle 90 is longer than the depth 28 from the liquid surface of the treatment tank 11 to the lower end of the workpiece 3 when the worktable 21 is in the lowered position. Therefore, when the nozzle 90 is immersed in the treatment tank 11 and facing the workpiece 3, the connection between the nozzle holder 88 and the second spindle 76 (tube sleeve joint 83) is not immersed in the treatment liquid 4. Therefore, wear and damage to the second spindle 76 and tube sleeve joint 83 caused by the jet of the treatment liquid 4 and the abrasive particles 5 can be suppressed.

[0101] The lifting device 19 can raise the worktable 21 to near the liquid level 15 of the processing tank 11. Therefore, the operator can disassemble the workpiece 3 on the worktable 21 above the liquid level 15. The operator can disassemble the workpiece 3 on the worktable 21 without draining the processing liquid 4 and abrasive particles 5 from the processing tank 11.

[0102] The nozzle 90 sprays the treatment liquid 4 while it is immersed in the treatment liquid 4 stored in the treatment tank 11. The liquid surface 15 is disturbed by spraying the treatment liquid 4 from the nozzle 90. However, the overflow of the treatment liquid 4 from the treatment tank 11 can be prevented by the first deflection portion 11d and the second deflection portion 11e disposed at the upper end of the treatment tank 11.

[0103] The guide bushing 27 is positioned above the liquid surface 15. Therefore, the abrasive particles 5 are unlikely to clog the interior of the guide bushing 27. The cylinder 24 is positioned outside the processing tank 11. Therefore, damage to the cylinder 24 caused by the processing liquid 4 and the abrasive particles 5 can be suppressed.

[0104] (Second Implementation)

[0105] like Figures 5 to 8 As shown, the shot peening apparatus 100 of this embodiment includes: a rotary worktable 39, a lifting device 119, and a worktable 121. Figure 6 as well as Figure 8 This is a cross-sectional view of the shot peening device 100 cut through a plane parallel to the front side and passing through the rotation axis of the worktable. The other structures of the shot peening device 100 in this embodiment are substantially the same as those of the shot peening device 10 in the first embodiment. Figure 5 as well as Figure 6 This indicates that the lifting device 119 has positioned the worktable 121 in the lowered position. Figure 8 This indicates that the lifting device 119 positions the worktable 121 between the lowered and raised positions.

[0106] The rotary table 39 includes: a first housing 41, a motor (table rotation device) 40, a first shaft 43, a bearing 42, a first support 44, and pins 45. The first housing 41 is disposed on the right side (first side) of the processing tank 11. The first housing 41 is a hollow cylindrical shape. The first shaft 43 is supported by the bearing 42 inside the first housing 41. The motor 40 is fixed to the first housing 41 on the outside of the processing tank 11. The output shaft of the motor 40 is connected to the first shaft 43. The first support 44 is L-shaped when viewed from the front and is vertically fastened to the first shaft 43. Pins 45 stand upright on the horizontal plane of the first support 44. Preferably, two pins 45 are disposed on the horizontal plane of the first support 44.

[0107] The lifting device 119 is located on the left side (second side). The lifting device 119 includes: a cylinder 24, a lifting bracket 23, a second housing 131, a second shaft 133, a bearing 132, a second bracket 125, a cam follower (guide) 126, and a pair of guide rails 127.

[0108] The second housing 131 is a hollow block and is located on the left side inside the processing tank 11. The second housing 131 is connected to the lower part of the lifting bracket 23. The second shaft 133 is supported by the bearing 132 inside the second housing 133. The second bracket 125 is cuboid in shape and is located at the left end of the worktable 121. A pair of cam followers 126 are located at the front and rear ends of the second bracket 125. The cam followers 126 rotate around the front-rear direction. Preferably, multiple sets of cam followers 126 are arranged vertically.

[0109] The guide rail 127 has a guide groove 127a. The guide rail 127 is C-shaped when viewed from a plane. The guide rail 127 extends vertically above the processing groove 11. Figure 5 as well as Figure 7 As shown, viewed from above, each guide groove 127a faces the central axis of the second shaft 133 and coincides with the center of the cam follower 126. When the lifting device 119 raises the worktable 121, the cam follower 126 rolls on the guide groove 127a, and the second support 125 is guided by the guide rail 127.

[0110] like Figure 5 as well as Figure 7 As shown, the worktable 121 has a pin hole 121a. The pin hole 121a is located at the right end of the worktable 121. A pin 45 is inserted into the pin hole 121a. Preferably, when the worktable 121 is raised by the cylinder 24 and the cam follower 126 reaches the guide groove 127a, the pin 45 is still in the pin hole 121a.

[0111] When motor 40 holds the first bracket 44 in the initial position (in) Figure 6 When the worktable 121 is in a horizontal position, the lifting device 119 raises and lowers the worktable 121. At this time, the cam follower 126 is guided by the guide groove 127a, and the rotation of the second support 125 and the worktable 121 is restricted. Therefore, the worktable 121 is raised and lowered while maintaining a roughly horizontal posture (see reference). Figure 8 ).

[0112] When the lifting device 119 lowers the worktable 121, pin 45 inserts into pin hole 121a when the worktable 121 reaches near the lowered position. Then, cam follower 126 disengages from guide groove 127a. When the worktable 121 reaches the lowered position, the central axes of the first shaft 43 and the second shaft 133 are aligned. Furthermore, the worktable 121 is connected to the first support 44 via pin 45. Therefore, the first support 44, the worktable 121, and the second support 125 can rotate as a single unit. Motor 40 allows the worktable 121 to rotate freely.

[0113] In this embodiment, the motor 40 is positioned outside the processing tank 11. Therefore, damage to the motor 40 caused by the processing liquid 4 and abrasive particles 5 can be suppressed. Furthermore, the guide rail 127 is located above the liquid surface 15. Therefore, damage to the guide rail 127 caused by the processing liquid 4 and abrasive particles 5 can be suppressed.

[0114] This invention is not limited to the embodiments described above. Various modifications can be made without departing from the spirit of this invention, and all technical matters included in the technical concept described in the claims are subject to this invention. The above embodiments illustrate suitable examples, but those skilled in the art will recognize that various alternatives, modifications, variations, or improvements can be implemented based on the content disclosed in this specification, and these are included within the technical scope described in the appended claims.

Claims

1. A shot peening device (10, 100), characterized in that, have: A processing tank (11) has an opening at the top, stores abrasive particles (5) and a processing liquid (4), and fluidizes the abrasive particles (5) through the processing liquid (4); Worktables (21, 121) are arranged in the processing tank (11) and hold workpieces (3); The moving part (49) has: Nozzle moving device (50); A sleeve (52) is disposed on the nozzle moving device (50); A first head (53) having a mounting hole (53a) and disposed at the front end of the sleeve (52); A motor (54) is disposed at the base end of the sleeve (52); and A first spindle (58), connected to the motor (54) and protruding from the mounting hole (53a), is rotatably disposed within the first head (53) about a vertical axis; and A nozzle head (61), which is separable from the moving part (49), and has the following features: The second head (65) has a connection port (65a) that connects to the mounting hole (53a) and is disposed on the first head (53); A connecting shaft (66) is disposed within the second head (65) and connected to the first spindle (58) via the connecting port (65a); The second spindle (76) is connected to the connecting shaft (66) and is rotatably disposed within the second head (65) about a vertical axis; A nozzle (90) is disposed below the second spindle (76); A nozzle flow path (87) extends through the interior of the second main shaft (76) and is connected to the nozzle (90), and has an opening at the upper end of the second main shaft (76); and A rotary joint (81) is disposed at the upper end of the second spindle (76) and connected to the nozzle flow path (87).

2. The shot peening apparatus (10, 100) according to claim 1, characterized in that, Further features include: A first bevel gear (57) is disposed within the first head (53) and connected to the motor (54). The second bevel gear (60) is disposed on the first spindle (58) and meshes with the first bevel gear (57).

3. The shot peening apparatus (10, 100) according to claim 1, characterized in that, The mounting hole (53a) is located above the first head (53). The second head (65) is connected above the first head (53).

4. The shot peening apparatus (10, 100) according to claim 2, characterized in that, The mounting hole (53a) is located above the first head (53). The second head (65) is connected above the first head (53).

5. The shot peening apparatus (10, 100) according to any one of claims 1 to 4, characterized in that, The second head (65) has the following internal features: A driving pulley (69) is disposed on the connecting shaft (66); Driven pulley (70), said driven pulley (70) is disposed on the second main shaft (76); and An annular belt (71) is mounted between the driving pulley (69) and the driven pulley (70).

6. The shot peening apparatus (10, 100) according to any one of claims 1 to 4, characterized in that, The first spindle (58) has a first keyway (58a) extending horizontally at its front end. The connecting shaft (66) has a second keyway (66a) extending horizontally at its base end. It further includes a key (68) configured between the first keyway (58a) and the second keyway (66a) to transmit rotation from the first spindle (58) to the connecting shaft (66).

7. The shot peening apparatus (10, 100) according to any one of claims 1 to 4, characterized in that, Below the second main shaft (76), there is further a nozzle holder (88) extending along the second main shaft (76). The nozzle (90) is connected to the lower end of the nozzle holder (88). The length (92) from the upper end of the nozzle holder (88) to the nozzle (90) is longer than the depth (28) from the liquid surface (15) of the treatment tank (11) to the lower surface of the workpiece (3).

8. The shot peening apparatus (10, 100) according to any one of claims 1 to 4, characterized in that, The lower end of the second spindle (76) is positioned further below the lower end of the first head (53).

9. The shot peening apparatus (10, 100) according to any one of claims 1 to 4, characterized in that, The processing tank (11) has: A dispersion chamber (12) is disposed below the processing tank (11); and Multiple flow nozzles (14) are equally arranged above the dispersion chamber (12) and spray the treatment liquid upward.

10. The shot peening apparatus (10, 100) according to claim 9, characterized in that, The dispersion chamber (12) has a plurality of recesses (13c) evenly arranged on its upper surface. The flow nozzles (14) are respectively disposed in the recesses (13c).

11. The shot peening apparatus (10, 100) according to claim 10, characterized in that, The flow nozzle (14) has: Main body (14a); A flow inlet (14b) is disposed at the lower end of the body (14a); An outlet (14e) is disposed at the upper end of the main body (14a); A mixing chamber (14d) is connected to the nozzle (14e) and is disposed in the central part of the main body (14a). An internal nozzle (14c) is disposed at the lower part of the main body (14a) and connects the inlet (14b) and the mixing chamber (14d); and A particle intake port (14f) is provided in the body (14a) and opens inside the recess (13c) and extends through the side of the mixing chamber (14d).

12. The shot peening apparatus (10, 100) according to any one of claims 1 to 4, characterized in that, Further features: A lifting device (19, 119) that raises and lowers the worktable (21, 121) from near the surface of the treatment liquid in the treatment tank (11) to the bottom of the treatment tank (11), and has the following features: A support column (23a) extends above the upper end of the worktable (21, 121) toward the processing tank (11); A connecting plate (23b) disposed at the upper end of the support column (23a) and extending from the support column (23a) to the side of the processing tank (11); and A cylinder (24) is connected to the connecting plate (23b) and is disposed on the side of the processing tank (11).

13. The shot peening apparatus (100) according to claim 12, characterized in that, have: A first housing (41) is disposed on a first side of the processing tank (11); A worktable rotation axis (43) is rotatably disposed in the first housing (41); A table rotation device (40) is connected to the table rotation shaft (43) and is disposed outside the processing tank (11); A first support (44) having a pin (45) and connected to the worktable rotation axis (43) inside the processing groove (11); A guide rail (127) is disposed above the processing groove (11) on the second side side opposite to the first side side; The second housing (131) is connected to the lifting device (119) and is disposed inside the processing tank (11); as well as The second support (125) has a guide (126) that guides the worktable (121) along the guide rail (127) and is rotatably disposed in the second housing (131). The workbench (121), Connected to the second bracket (125), and It has a pin hole (121a) disposed on the first side surface, and the pin (45) is inserted into the pin hole (121a). When the device (119) lowers the object to the lower end, the guide (126) separates from the guide rail (127), the pin (45) is inserted into the pin hole (121a), and the object is able to rotate integrally with the first bracket (44) via the worktable rotating device (40). The guide (126) is guided by the guide rail (127) and raised by the lifting device (119).

14. The shot peening apparatus (100) according to claim 13, characterized in that, When the lifting device (119) lowers the worktable (121) to the lowered position, the lower end of the guide rail (127) is located above the upper end of the second bracket (125). When the lifting device (119) raises the worktable (121) from the lowered position, the guide (126) is guided by the guide rail (127).

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