Clamping device of numerical control spinning machine

Abstract

The utility model relates to the field of spinning machines, and discloses a clamping device of a numerical control spinning machine, which comprises a frame body, a machine case and a supporting plate, a height adjusting mechanism is arranged among the frame body, the machine case and the supporting plate, a fixing disc is rotatably arranged on one side of the machine case, a center positioning mechanism is arranged on one side of the fixing disc, and the center positioning mechanism is arranged on the other side of the machine case. A rotary adsorption mechanism is arranged between the machine box and the fixing disc, a hydraulic cylinder is fixedly connected to one side of the supporting plate, a disc is fixedly connected to an output shaft of the hydraulic cylinder, and four connecting rods are fixedly connected to one side of the disc. Compared with the prior art, the device has the advantages that wheel blanks with different shaft diameters can be effectively positioned, the situation that the machining quality is affected due to the fact that the wheel blanks deviate in the spinning process is avoided, the tire blanks can be firmly fixed under triple fixing of adsorption fixing, extrusion fixing and center fixing, clamping is firmer, and the machining efficiency is improved. And the wheel blank is prevented from displacing to influence the machining precision.

Description

Technical Field

[0001] This utility model relates to the field of spinning machine technology, and in particular to a clamping device for a CNC spinning machine. Background Technology

[0002] Spinning is a low-cost, high-efficiency part forming process that is increasingly widely used in the machining industry. During the spinning process on wheel blanks, the blank needs to be fixed in place, and the spun product is removed from the mandrel after spinning is complete.

[0003] A search revealed a clamping device for a CNC spinning machine with Chinese patent number CN214813980U. The device includes a fixing part located at the end of the drive shaft, a guide sleeve on a housing above the fixing part, a first positioning block on the inner side of the guide sleeve, and a first electric telescopic rod fixed to the top surface of the housing. The first electric telescopic rod is connected to the first positioning block in a transmission manner.

[0004] However, the clamping device of the CNC spinning machine mentioned above still has shortcomings. It is inconvenient to effectively position wheel blanks of different shaft diameters, which makes the wheel blanks prone to displacement during spinning and affects the processing quality. At the same time, it is easy to have an unstable clamping, which makes the wheel blanks prone to displacement and further affects the processing accuracy. Therefore, we propose a clamping device for CNC spinning machines to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a clamping device for a CNC spinning machine, which can effectively position wheel blanks of different shaft diameters, preventing the wheel blanks from shifting during spinning and affecting the processing quality. Under the triple fixation of adsorption fixation, extrusion fixation and center fixation, the tire blanks can be firmly fixed, making the clamping more secure and preventing the wheel blanks from shifting and affecting the processing accuracy.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a clamping device for a CNC spinning machine, comprising a frame, a housing, and a support plate, wherein a height adjustment mechanism is provided between the frame, the housing, and the support plate; a fixed plate is rotatably mounted on one side of the housing; a center positioning mechanism is provided on one side of the fixed plate; a rotation adsorption mechanism is provided between the housing and the fixed plate; a hydraulic cylinder is fixedly connected to one side of the support plate; a disc is fixedly connected to the output shaft of the hydraulic cylinder; four connecting rods are fixedly connected to one side of the disc; and a common pressure ring is fixedly connected to one end of each of the four connecting rods.

[0007] A further feature of this invention is that the height adjustment mechanism includes a servo motor fixedly connected to one side of the frame and two lifting screws rotatably connected to the top of the frame. A drive shaft is fixedly connected to the output shaft of the servo motor. Two active bevel gears are fixedly sleeved on the outer side of the drive shaft. A driven bevel gear is fixedly connected to the bottom end of each of the two lifting screws. The two active bevel gears mesh with the corresponding driven bevel gears. A lifting plate is threaded onto the outer side of each of the two lifting screws. The chassis and the support plate are fixedly connected to the top of the corresponding lifting plate.

[0008] By adopting the above technical solution, the servo motor drives the rotation of the drive shaft and two active bevel gears. The two active bevel gears drive the synchronous rotation of the two driven bevel gears and the lifting screw. The two lifting screws drive the synchronous lifting of the two lifting plates, the housing and the support plate, thereby adjusting the height of the fixed plate and the pressure ring to spin tire blanks of different diameters. At the same time, the tire blanks can be placed on the frame for clamping. After clamping, they can be moved up a certain height, making the clamping of tire blanks more convenient and efficient.

[0009] A further feature of this invention is that four guide rods are fixedly connected to the top of the frame, and two lifting plates are slidably sleeved on the outside of the corresponding guide rods.

[0010] By adopting the above technical solution, it is convenient to guide and limit the lifting plate, making its movement more stable and smooth.

[0011] A further feature of this invention is that the rotary adsorption mechanism includes a drive motor fixedly connected to the inner wall of the bottom of the chassis and a hollow shaft rotatably connected to one side of the chassis, and a vacuum pump fixedly connected to the other side of the chassis. A drive gear is fixedly connected to the output shaft of the drive motor, and a driven gear is fixedly sleeved on the outer side of the hollow shaft. The drive gear and the driven gear mesh with each other. A fixed disk is fixedly connected to one end of the hollow shaft. A suction pipe is fixedly connected to one side of the vacuum pump, and the suction pipe is rotatably connected to the other end of the hollow shaft. A plurality of adsorption holes are opened on one side of the fixed disk.

[0012] By adopting the above technical solution, the air in the fixed plate can be drawn into the hollow shaft and the air extraction pipe by the vacuum pump, and finally discharged from the air outlet of the vacuum pump, so that a negative pressure is formed in the fixed plate. Under the negative pressure, the tire blank can be firmly adsorbed and fixed. The drive motor is started, and the drive motor drives the rotation of the drive gear. The drive gear drives the rotation of the driven gear, the hollow shaft fixed plate and the tire blank, and then the tire blank can be spun.

[0013] A further feature of this invention is that a sealed bearing is fixedly connected to one side of the hollow shaft, the air extraction pipe is fixedly sleeved inside the inner ring of the sealed bearing, a support bearing is fixedly connected to one side of the chassis, and the hollow shaft is fixedly sleeved inside the inner ring of the support bearing.

[0014] By adopting the above technical solution, it is convenient to support the hollow shaft, making its rotation more stable. At the same time, it is convenient to seal the connection between the air extraction pipe and the hollow shaft to prevent air leakage, while not hindering the rotation of the hollow shaft.

[0015] A further feature of this invention is that the central positioning mechanism includes a positioning cylinder fixedly connected to the center of one side of the fixed disk. The two inner walls of the positioning cylinder are rotatably connected to the same bidirectional lead screw. Two movable disks are threaded on the outer side of the bidirectional lead screw. Push-pull rods are rotatably connected to the outer perimeter of each movable disk. The outer ends of the two push-pull rods on the same side are rotatably connected to the same sliding plate. Two connecting rods are fixedly connected to the outer sides of each of the four sliding plates. The outer ends of the two connecting rods are fixedly connected to the same arc-shaped plate.

[0016] By adopting the above technical solution, the tire blank can be centered using the positioning cylinder, avoiding offset during clamping that would affect processing quality. Depending on the size of the axle hole of the tire blank, the double-acting screw is rotated by the handwheel. The double-acting screw drives the two moving discs to move closer or further apart. The two moving discs drive the eight push-pull rods, four sliding plates, eight connecting rods, and the arc plate to move outward or inward synchronously. This allows for effective center positioning and fixation of tire blanks with axle holes of different sizes, improving the stability of clamping.

[0017] A further feature of this invention is that one end of the bidirectional lead screw extends to the outside of the positioning cylinder and is fixedly connected to a handwheel.

[0018] By adopting the above technical solution, it is beneficial to rotate the bidirectional lead screw.

[0019] A further feature of this invention is that two limiting rods are fixedly connected to the inner walls of both sides of the positioning cylinder, and two movable disks are slidably sleeved on the outside of the two limiting rods. Two sliding holes are opened around the outer perimeter of the positioning cylinder, and eight connecting rods are slidably sleeved in the corresponding sliding holes.

[0020] By adopting the above technical solution, it is convenient to guide the moving disk and connecting rod, making their movement more stable.

[0021] The beneficial effects of this utility model are:

[0022] 1. This utility model uses a positioning cylinder to center-position the tire blank, preventing offset during clamping and affecting processing quality. According to the size of the axle hole of the tire blank, the double-acting screw is rotated by the handwheel. The double-acting screw drives the two moving discs to move closer or further apart. The two moving discs drive the eight push-pull rods, four sliding plates, eight connecting rods and the arc plate to move outward or inward synchronously. Thus, tire blanks with axle holes of different sizes can be effectively centered and fixed, improving the stability of clamping.

[0023] 2. This utility model uses a vacuum pump to draw air from the fixed plate into the hollow shaft and the suction pipe, and finally discharges it from the outlet of the vacuum pump, creating a negative pressure inside the fixed plate. Under this negative pressure, the tire blank can be firmly adsorbed and fixed. Finally, under the action of the hydraulic cylinder, the disc, connecting rod and pressure ring are driven to move to the left to press and fix the tire blank tightly. Thus, under the triple fixation of adsorption fixation, compression fixation and center fixation, the tire blank can be firmly fixed between the fixed plate, positioning cylinder and pressure ring. Finally, the drive motor is started, and the drive motor drives the rotation of the drive gear. The drive gear drives the rotation of the driven gear, the hollow shaft fixed plate and the tire blank, thereby enabling the spinning process of the tire blank.

[0024] 3. This utility model uses a servo motor to drive the rotation of the drive shaft and two active bevel gears. The two active bevel gears drive the synchronous rotation of the two driven bevel gears and the lifting screw. The two lifting screws drive the synchronous lifting of the two lifting plates, the housing and the support plate, thereby adjusting the height of the fixed plate and the pressure ring to spin-press tire blanks of different diameters. At the same time, the tire blanks can be placed on the frame for clamping. After clamping, they can be moved up a certain height, making the clamping of tire blanks more convenient and efficient. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the clamping device for a CNC spinning machine proposed in this utility model;

[0027] Figure 2 This is a sectional perspective view of the casing of a clamping device for a CNC spinning machine proposed in this utility model;

[0028] Figure 3 for Figure 1 A schematic diagram of the structure of part A;

[0029] Figure 4 This is a sectional perspective view of the center positioning mechanism of the clamping device of a CNC spinning machine proposed in this utility model.

[0030] In the diagram, 1. Frame; 2. Chassis; 3. Support plate; 4. Rotary adsorption mechanism; 5. Fixed plate; 51. Adsorption hole; 6. Center positioning mechanism; 7. Hydraulic cylinder; 8. Height adjustment mechanism; 9. Disc; 10. Connecting rod one; 11. Pressure ring; 41. Vacuum pump; 42. Drive motor; 43. Drive gear; 44. Driven gear; 45. Hollow shaft; 46. Sealed bearing; 47. Evacuation pipe; 61. Positioning cylinder; 62. Bidirectional lead screw; 63. Moving disc; 64. Limiting rod; 65. Slide plate; 66. Connecting rod; 67. Arc plate; 68. Push-pull rod; 69. Handwheel; 81. Servo motor; 82. Drive shaft; 83. Drive bevel gear; 84. Driven bevel gear; 85. Lifting lead screw; 86. Lifting plate; 87. Guide rod. Detailed Implementation

[0031] The technical solution of this utility model will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0032] See Figure 1 — Figure 4 This utility model provides a clamping device for a CNC spinning machine, including a frame 1, a housing 2, and a support plate 3. A height adjustment mechanism 8 is provided between the frame 1, the housing 2, and the support plate 3. A fixed plate 5 is rotatably mounted on one side of the housing 2. A center positioning mechanism 6 is provided on one side of the fixed plate 5. A rotary adsorption mechanism 4 is provided between the housing 2 and the fixed plate 5. A hydraulic cylinder 7 is fixedly connected to one side of the support plate 3. A disc 9 is fixedly connected to the output shaft of the hydraulic cylinder 7. Four connecting rods 10 are fixedly connected to one side of the disc 9. One end of each of the four connecting rods 10 is fixedly connected to the same pressure ring 11.

[0033] Specifically, the height adjustment mechanism 8 includes a servo motor 81 fixedly connected to one side of the frame 1 and two lifting screws 85 rotatably connected to the top of the frame 1. A drive shaft 82 is fixedly connected to the output shaft of the servo motor 81. Two active bevel gears 83 are fixedly sleeved on the outer side of the drive shaft 82. A driven bevel gear 84 is fixedly connected to the bottom end of each of the two lifting screws 85. The two active bevel gears 83 mesh with the corresponding driven bevel gears 84. A lifting plate 86 is threadedly sleeved on the outer side of each of the two lifting screws 85. The housing 2 and the support plate 3 are fixedly connected to the top of the corresponding lifting plate 86.

[0034] Specifically, four guide rods 87 are fixedly connected to the top of the frame 1, and two lifting plates 86 are slidably sleeved on the outside of the corresponding guide rods 87.

[0035] Specifically, the rotary adsorption mechanism 4 includes a drive motor 42 fixedly connected to the inner wall of the bottom of the housing 2 and a hollow shaft 45 rotatably connected to one side of the housing 2, and a vacuum pump 41 fixedly connected to the other side of the housing 2. A drive gear 43 is fixedly connected to the output shaft of the drive motor 42. A driven gear 44 is fixedly sleeved on the outer side of the hollow shaft 45. The drive gear 43 and the driven gear 44 mesh with each other. A fixed disk 5 is fixedly connected to one end of the hollow shaft 45. A suction pipe 47 is fixedly connected to one side of the vacuum pump 41. The suction pipe 47 is rotatably connected to the other end of the hollow shaft 45. A plurality of adsorption holes 51 are opened on one side of the fixed disk 5.

[0036] Specifically, a sealed bearing 46 is fixedly connected to one side of the hollow shaft 45, and an air extraction pipe 47 is fixedly sleeved inside the inner ring of the sealed bearing 46.

[0037] Specifically, a support bearing is fixedly connected to one side of the chassis 2, and the hollow shaft 45 is fixedly sleeved inside the inner ring of the support bearing.

[0038] Specifically, the central positioning mechanism 6 includes a positioning cylinder 61 fixedly connected to the center of one side of the fixed disk 5. The inner walls of both sides of the positioning cylinder 61 are rotatably connected to the same bidirectional lead screw 62. Two movable disks 63 are threaded on the outer side of the bidirectional lead screw 62. Push-pull rods 68 are rotatably connected to the outer perimeter of each movable disk 63. The outer ends of the two push-pull rods 68 on the same side are rotatably connected to the same slide plate 65. Two connecting rods 66 are fixedly connected to the outer sides of each of the four slide plates 65. The outer ends of the two connecting rods 66 are fixedly connected to the same arc-shaped plate 67.

[0039] Specifically, one end of the bidirectional lead screw 62 extends to the outside of the positioning cylinder 61 and is fixedly connected to a handwheel 69.

[0040] Specifically, two limiting rods 64 are fixedly connected to the inner walls on both sides of the positioning cylinder 61, and the two moving disks 63 are slidably sleeved on the outside of the two limiting rods 64.

[0041] Specifically, two sliding holes are opened on all four sides of the outer side of the positioning cylinder 61, and eight connecting rods 66 are slidably sleeved in the corresponding sliding holes.

[0042] This utility model uses a servo motor 81 to drive the rotation of the drive shaft 82 and two active bevel gears 83. The two active bevel gears 83 drive the synchronous rotation of the two driven bevel gears 84 and the lifting screw 85. The two lifting screws 85 drive the synchronous lifting of the two lifting plates 86, the housing 2 and the support plate 3, thereby adjusting the height of the fixed plate 5 and the pressure ring 11 to spin tire blanks of different diameters. At the same time, the tire blanks can be placed on the frame 1 for clamping. After clamping, they can be moved up a certain height, making the clamping of tire blanks more convenient and efficient.

[0043] The positioning cylinder 61 allows for center positioning of the tire blank, preventing offset during clamping and ensuring processing quality. Depending on the size of the axle hole in the tire blank, the handwheel 69 rotates the double-acting screw 62, which in turn moves the two moving discs 63 closer together or further apart. These discs, in turn, cause the eight push-pull rods 68, four sliding plates 65, eight connecting rods 66, and the arc-shaped plate 67 to move synchronously outward or inward. This effectively centers and fixes tire blanks with axle holes of different sizes, improving clamping stability. The vacuum pump 41 draws air from the fixing disc 5 into the hollow shaft 45 and the extraction pipe 47, ultimately removing the air from the vacuum... The air outlet of pump 41 discharges, creating a negative pressure inside the fixed plate 5. Under this negative pressure, the tire blank is firmly adsorbed and fixed. Finally, under the action of hydraulic cylinder 7, the disc 9, connecting rod 10, and pressure ring 11 are driven to move to the left to press and fix the tire blank. Thus, under the triple fixation of adsorption, compression, and center fixation, the tire blank is firmly fixed between the fixed plate 5, positioning cylinder 61, and pressure ring 11. Finally, the drive motor 42 is started, which drives the rotation of the drive gear 43. The drive gear 43 drives the rotation of the driven gear 44, hollow shaft 45, fixed plate 5, and tire blank, thereby enabling the tire blank to be spun.

Claims

1. A clamping device for a CNC spinning machine, characterized in that, The device includes a frame (1), a housing (2), and a support plate (3). A height adjustment mechanism (8) is provided between the frame (1), the housing (2), and the support plate (3). A fixed plate (5) is rotatably provided on one side of the housing (2). A center positioning mechanism (6) is provided on one side of the fixed plate (5). A rotating adsorption mechanism (4) is provided between the housing (2) and the fixed plate (5). A hydraulic cylinder (7) is fixedly connected to one side of the support plate (3). A disc (9) is fixedly connected to the output shaft of the hydraulic cylinder (7). Four connecting rods (10) are fixedly connected to one side of the disc (9). One end of the four connecting rods (10) is fixedly connected to the same pressure ring (11).

2. The clamping device for a CNC spinning machine according to claim 1, characterized in that: The height adjustment mechanism (8) includes a servo motor (81) fixedly connected to one side of the frame (1) and two lifting screws (85) rotatably connected to the top of the frame (1). A drive shaft (82) is fixedly connected to the output shaft of the servo motor (81). Two active bevel gears (83) are fixedly sleeved on the outside of the drive shaft (82). A driven bevel gear (84) is fixedly connected to the bottom of each of the two lifting screws (85). The two active bevel gears (83) mesh with the corresponding driven bevel gears (84). A lifting plate (86) is threadedly sleeved on the outside of each of the two lifting screws (85). The housing (2) and the support plate (3) are fixedly connected to the top of the corresponding lifting plate (86).

3. The clamping device for a CNC spinning machine according to claim 2, characterized in that: The top of the frame (1) is fixedly connected with four guide rods (87), and two lifting plates (86) are slidably sleeved on the outside of the corresponding guide rods (87).

4. The clamping device for a CNC spinning machine according to claim 1, characterized in that: The rotary adsorption mechanism (4) includes a drive motor (42) fixedly connected to the inner wall of the bottom of the housing (2) and a hollow shaft (45) rotatably connected to one side of the housing (2), and a vacuum pump (41) fixedly connected to the other side of the housing (2). A drive gear (43) is fixedly connected to the output shaft of the drive motor (42). A driven gear (44) is fixedly sleeved on the outer side of the hollow shaft (45). The drive gear (43) meshes with the driven gear (44). A fixed disk (5) is fixedly connected to one end of the hollow shaft (45). A suction pipe (47) is fixedly connected to one side of the vacuum pump (41). The suction pipe (47) is rotatably connected to the other end of the hollow shaft (45). A plurality of adsorption holes (51) are opened on one side of the fixed disk (5).

5. The clamping device for a CNC spinning machine according to claim 4, characterized in that: A sealed bearing (46) is fixedly connected to one side of the hollow shaft (45), and the air extraction pipe (47) is fixedly sleeved inside the inner ring of the sealed bearing (46).

6. The clamping device for a CNC spinning machine according to claim 4, characterized in that: A support bearing is fixedly connected to one side of the chassis (2), and the hollow shaft (45) is fixedly sleeved inside the inner ring of the support bearing.

7. The clamping device for a CNC spinning machine according to claim 1, characterized in that: The central positioning mechanism (6) includes a positioning cylinder (61) fixedly connected to the center of one side of the fixed disk (5). The inner walls of both sides of the positioning cylinder (61) are rotatably connected to the same bidirectional lead screw (62). The outer side of the bidirectional lead screw (62) is threaded with two movable disks (63). Push-pull rods (68) are rotatably connected to the outer periphery of the movable disks (63). The outer ends of the two push-pull rods (68) on the same side are rotatably connected to the same sliding plate (65). The outer sides of the four sliding plates (65) are fixedly connected to two connecting rods (66). The outer ends of the two connecting rods (66) are fixedly connected to the same arc plate (67).

8. The clamping device for a CNC spinning machine according to claim 7, characterized in that: One end of the bidirectional lead screw (62) extends to the outside of the positioning cylinder (61) and is fixedly connected to a handwheel (69).

9. The clamping device for a CNC spinning machine according to claim 7, characterized in that: Two limiting rods (64) are fixedly connected to the inner walls on both sides of the positioning cylinder (61), and two moving disks (63) are slidably sleeved on the outside of the two limiting rods (64).

10. The clamping device for a CNC spinning machine according to claim 7, characterized in that: Two sliding holes are provided around the outer perimeter of the positioning cylinder (61), and eight connecting rods (66) are slidably sleeved in the corresponding sliding holes.

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