A horizontal numerical control lathe lengthens thin wall partial heavy type valve cover processing damping tooling

Abstract

The application belongs to the field of valve cover processing equipment, and particularly relates to a horizontal numerical control lathe lengthened thin-wall eccentric heavy valve cover processing damping tool, which comprises a workbench, two symmetrical bench drills arranged on the workbench, a supporting frame arranged on the workbench, a first rotating shaft arranged on the supporting frame, a rotating disc arranged on the first rotating shaft, supporting legs arranged at the bottom of the workbench, two clamps symmetrically arranged on the rotating disc, the rotating disc driven by a turnover assembly, a moving assembly arranged between the workbench and the bench drill, the moving assembly comprising a rectangular groove arranged on the workbench, a sliding block arranged in the rectangular groove, a base fixed on the sliding block, the bench drill arranged on the base, and the moving assembly further comprising a driving component and a feeding speed adjusting component. The feeding speed adjusting component is arranged to avoid impact and vibration caused by rapid feeding, improve drilling precision, and reduce drill wear.

Description

Technical Field

[0001] This invention belongs to the field of valve cover processing equipment, and in particular relates to a vibration damping fixture for processing extended thin-walled heavy-duty valve covers on a horizontal CNC lathe. Background Technology

[0002] A valve cover is a valve component containing a valve stem seal. Its main function is to connect or support the actuator, ensuring the normal operation of the valve. Valve covers are widely used in various industrial fields, including but not limited to petroleum, chemical, power, metallurgy, and water treatment. In these fields, the role of the valve cover is crucial, not only affecting the sealing performance of the valve but also directly impacting the safety and stability of the entire system.

[0003] When drilling the center hole of the valve cover, the common method is to use a CNC three-jaw clamp in conjunction with the machine tool center support to fix the valve cover, and then control the movement of the drill bit to drill the hole in the valve cover.

[0004] The existing device also has the following shortcomings:

[0005] 1. For extended thin-walled heavy-duty valve covers, the length of the center hole is also correspondingly longer. Therefore, it is difficult to complete the hole opening in one go. When opening the hole, it is usually done by first opening a hole at one end of the valve cover, and then flipping the workpiece to open a hole at the other end of the valve cover. However, positioning errors are easily generated when the valve cover is flipped, which affects the machining accuracy. Moreover, this hole opening method has low working efficiency.

[0006] 2. When drilling, the valve cover will vibrate due to the impact of the drill bit at the moment of contact. The vibration of the valve cover will directly affect the machining accuracy. If the vibration amplitude is large, it may even damage the valve cover. In addition, the impact between the drill bit and the valve cover will also reduce the service life of the drill bit.

[0007] 3. With the existing drilling method, after the drill bit is drilled, the valve cover needs to be removed from the fixture and a new valve cover needs to be re-clamped before the drilling work can continue. The drill bit needs to wait for the clamping process, so it cannot drill continuously, resulting in poor work continuity and low work efficiency. Summary of the Invention

[0008] The purpose of this invention is to address the problems mentioned in the background section by providing a vibration damping fixture for machining extended thin-walled, heavy-duty valve covers on a horizontal CNC lathe.

[0009] To achieve the above objectives, the present invention adopts the following technical solution: a vibration damping fixture for machining extended thin-walled, heavy-duty valve covers on a horizontal CNC lathe, comprising:

[0010] The workbench is equipped with two symmetrically arranged bench drills, a support frame, a first rotating shaft, a rotating disk, and support legs at the bottom of the workbench.

[0011] The clamps are two in number and symmetrically distributed on a rotating disk, which is driven by a flipping assembly.

[0012] Furthermore, a moving component is provided between the worktable and the bench drill. The moving component includes a rectangular groove formed on the worktable, a slider provided in the rectangular groove, a base fixed on the slider, and the bench drill disposed on the base. The moving component also includes a driving component and a feed speed adjustment component.

[0013] Furthermore, the driving component includes a motor fixed on the support leg, and the support leg is provided with two second rotating shafts, each of which is provided with a pulley, and the two pulleys are driven by a belt in a cross manner.

[0014] Furthermore, the feed speed adjustment component includes an incomplete gear fixed on the second rotating shaft, the incomplete gear having a cylindrical pin, the support leg having a central shaft, a rocker arm rotatably connected to the central shaft, the rocker arm having a U-shaped groove, the cylindrical pin being slidably connected within the U-shaped groove, and a connecting rod rotatably connected to the slider, the end of the connecting rod away from the slider being rotatably connected to the end of the rocker arm away from the central shaft.

[0015] Furthermore, the workbench is provided with a cleaning assembly, which includes a third rotating shaft rotatably connected to the support leg. A first spur gear that meshes with an incomplete gear is fixed on the third rotating shaft. A movable plate is provided on the third rotating shaft. A guide rod that passes through the movable plate is provided on the workbench. An L-shaped rod is fixed on the guide rod. A cleaning plate is fixed on the L-shaped rod.

[0016] Furthermore, the number of teeth of the incomplete gear is the same as the number of teeth of the first spur gear. A cam groove is provided on the third rotating shaft, and a limiting rod adapted to the cam groove is provided on the movable plate. When the incomplete gear rotates one revolution, the movable plate moves back and forth once along the axial direction of the third rotating shaft under the action of the cam groove.

[0017] Furthermore, the flipping assembly includes a connecting rod fixed to an L-shaped rod, a rack rotatably connected to the connecting rod, and a second spur gear meshing with the rack on the first rotating shaft, wherein the number of teeth on the rack is half the number of teeth on the second spur gear.

[0018] Furthermore, the rack has a traction rod, and the support frame has a diamond-shaped groove adapted to the traction rod. A baffle is provided at the corner of the diamond-shaped groove near the first rotating shaft, and the baffle is rotatably connected to the side wall of the diamond-shaped groove.

[0019] Compared with existing technologies, the advantages of this invention are:

[0020] 1. This invention uses two bench drills to simultaneously drill holes at both ends of the valve cover, reducing the number of times the valve cover needs to be flipped and repositioned, thereby reducing positioning errors and improving machining accuracy. Furthermore, by drilling holes at both ends simultaneously, the time required for drilling is greatly shortened, improving work efficiency and reducing the time cost of drilling.

[0021] 2. This invention, by setting up a feed rate adjustment component, uses a motor to drive an incomplete gear to rotate, which in turn drives a rocker arm to swing back and forth under the action of a cylindrical pin. When the cylindrical pin is in the upper half of the incomplete gear, the bench drill is in the feed state. At this time, the distance between the cylindrical pin and the central shaft is large, and the swing speed of the rocker arm with the rotation of the incomplete gear is small. The feed rate of the bench drill is small, which allows the drill bit to enter slowly and smoothly when it contacts the valve cover, avoiding the impact and vibration caused by rapid feed, improving drilling accuracy and extending the service life of the drill bit. When the cylindrical pin is in the lower half of the incomplete gear, the bench drill is in the retraction state. At this time, the feed rate of the bench drill is large, and the drill bit quickly withdraws from the hole, reducing the friction time of the drill bit in the hole, thereby reducing drill bit wear and further extending the service life of the drill bit.

[0022] 3. By setting up a cleaning component, when the drill bit retracts and separates from the valve cover, the incomplete gear begins to mesh with the first column gear. When the bench drill returns to its initial position, the incomplete gear drives the first column gear and the third rotating shaft to rotate one revolution. Under the action of the cam groove, the movable plate drives the L-shaped rod and the cleaning plate to move back and forth once, pushing the debris on the worktable away from under the valve cover. This prevents the debris from accumulating under the valve cover, which would cause the debris generated during drilling to not fall off in time and affect the drilling quality, thus improving the drilling accuracy.

[0023] 4. By setting up a flipping component, the L-shaped rod moves, driving the connecting rod and rack to move, thereby driving the second column gear and rotating disk to rotate 180°, exchanging the positions of the processed valve cover and the unprocessed valve cover, saving the waiting time for clamping, realizing continuous opening, strong work continuity, and high work efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of a vibration damping fixture for machining extended thin-walled heavy-duty valve covers on a horizontal CNC lathe, provided by the present invention.

[0025] Figure 2 This is a schematic diagram of the overall side view of a vibration damping fixture for machining extended thin-walled heavy-duty valve covers on a horizontal CNC lathe, provided by the present invention.

[0026] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0027] Figure 4This is a schematic diagram of the moving component and feed speed regulating component of a vibration damping fixture for machining extended thin-walled heavy-duty valve covers on a horizontal CNC lathe provided by the present invention.

[0028] Figure 5 This is a front view schematic diagram of the moving component and feed speed regulating component of the vibration damping fixture for machining extended thin-walled heavy-duty valve covers on a horizontal CNC lathe provided by the present invention.

[0029] Figure 6 This is a schematic diagram of the cleaning component structure of a vibration damping fixture for machining extended thin-walled heavy-duty valve covers on a horizontal CNC lathe, provided by the present invention.

[0030] Figure 7 This is a schematic diagram of the movable plate structure of a vibration damping fixture for machining extended thin-walled heavy-duty valve covers on a horizontal CNC lathe, provided by the present invention.

[0031] Figure 8 This is a schematic diagram of the flipping assembly structure of a vibration damping fixture for machining extended thin-walled heavy-duty valve covers on a horizontal CNC lathe, provided by the present invention.

[0032] Figure 9 yes Figure 8 Enlarged view at point B in the middle;

[0033] Figure 10 This is a schematic diagram of the connecting rod and rack motion structure of a vibration damping fixture for machining extended thin-walled heavy-duty valve covers on a horizontal CNC lathe provided by the present invention.

[0034] In the diagram, 1 is the workbench, 11 is the drill press, 12 is the support frame, 13 is the first rotating shaft, 14 is the rotating disk, and 15 is the support leg.

[0035] 2. Fixtures;

[0036] 31 Rectangular groove, 32 Slider, 33 Base;

[0037] 41 Motor, 42 Second rotating shaft, 421 Incomplete gear, 422 Cylindrical pin, 43 Pulley, 44 Central shaft, 45 Rocker arm, 451 U-groove, 46 Connecting rod;

[0038] 51 Third rotating shaft, 52 First column gear, 53 Movable plate, 54 Guide rod, 55 L-shaped rod, 56 Cleaning plate, 511 Cam groove, 531 Limiting rod;

[0039] 61 Connecting rod, 62 Rack, 621 Traction rod, 63 Second column gear, 64 Diamond groove, 641 Baffle. Detailed Implementation

[0040] The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0041] like Figures 1-10As shown, a vibration damping fixture for machining extended thin-walled, heavy-duty valve covers on a horizontal CNC lathe includes:

[0042] Workbench 1, with two symmetrically arranged bench drills 11 on the workbench 1, support frame 12 on the workbench 1, first rotating shaft 13 on the support frame 12, rotating disk 14 on the first rotating shaft 13, and support legs 15 at the bottom of the workbench 1.

[0043] The clamp 2 has two clamps that are symmetrically distributed on the rotating disk 14, which is driven by a flipping assembly.

[0044] A moving component is provided between the worktable 1 and the bench drill 11. The moving component includes a rectangular groove 31 opened on the worktable 1, a slider 32 is provided in the rectangular groove 31, a base 33 is fixed on the slider 32, and the bench drill 11 is placed on the base 33. The moving component also includes a driving component and a feed speed adjustment component.

[0045] The driving component includes a motor 41 fixed on the support leg 15. The support leg 15 is provided with two second rotating shafts 42. Each of the two second rotating shafts 42 is provided with a pulley 43. The two pulleys are driven by a belt.

[0046] The feed speed adjustment component includes an incomplete gear 421 fixed on the second rotating shaft 42. The incomplete gear 421 is provided with a cylindrical pin 422 and has multiple evenly distributed weight-reducing holes. The support leg 15 is provided with a central shaft 44. A rocker arm 45 is rotatably connected to the central shaft 44. A U-shaped groove 451 is provided on the rocker arm 45. The cylindrical pin 422 is slidably connected in the U-shaped groove 451. A connecting rod 46 is rotatably connected to the slider 32. The end of the connecting rod 46 away from the slider 32 is rotatably connected to the end of the rocker arm 45 away from the central shaft 44.

[0047] In practice, the valve cover to be processed is fixed on the rotating disk 14 by the clamp 2. The motor 41 is turned on, and the rotation of the motor 41 drives the second rotating shaft 42 and the incomplete gear 421 to rotate. The cylindrical pin 422 rotates synchronously around the central axis of the incomplete gear 421 and drives the rocker arm 45 to swing back and forth. Thus, under the action of the connecting rod 46, the bench drill 11 moves horizontally back and forth. When the cylindrical pin 422 is in the upper part of the incomplete gear 421, the bench drill 11 is in the feed state. At this time, the distance between the cylindrical pin 422 and the central shaft 44 is large, and the rocker arm 45 moves back and forth. The slow rotation and oscillation speed of the fully geared 421, coupled with the slow feed speed of the bench drill 11, allows the drill bit to enter the valve cover slowly and smoothly, avoiding impacts and vibrations caused by rapid feed. This improves drilling accuracy and extends the lifespan of the drill bit. When the cylindrical pin 422 is located in the lower half of the incomplete gear 421, the bench drill 11 is in a retracted state. At this time, the feed speed of the bench drill 11 is high, and the drill bit quickly exits the hole, reducing the friction time of the drill bit in the hole, thereby reducing drill bit wear and further extending the lifespan of the drill bit.

[0048] The workbench 1 is equipped with a cleaning assembly, which includes a third rotating shaft 51 rotatably connected to the support leg 15. A first spur gear 52 that meshes with the incomplete gear 421 is fixed on the third rotating shaft 51. A movable plate 53 is provided on the third rotating shaft 51. A guide rod 54 that passes through the movable plate 53 is provided on the workbench 1. An L-shaped rod 55 is fixed on the guide rod 54. A cleaning plate 56 is fixed on the L-shaped rod 55.

[0049] The number of teeth of the incomplete gear 421 is the same as the number of teeth of the first spur gear 52. A cam groove 511 is provided on the third rotating shaft 51. A limiting rod 531 that matches the cam groove 511 is provided on the movable plate 53. When the incomplete gear 421 rotates one revolution, the movable plate 53 moves back and forth once along the axial direction of the third rotating shaft 51 under the action of the cam groove 511.

[0050] During the retraction of the drill bit, after the drill bit separates from the valve cover, the incomplete gear 421 meshes with the first spur gear 52. When the bench drill 11 returns to its initial position, the incomplete gear 421 separates from the first spur gear 52 again. During the process from the separation of the drill bit from the valve cover to the return of the bench drill 11 to its initial position, the incomplete gear 421 drives the first spur gear 52 to rotate one revolution. Under the action of the cam groove 511 and the limit rod 531, the movable plate 53 reciprocates once along the central axis of the first spur gear 52, thereby driving the L-shaped rod 55 and the cleaning plate 56 to reciprocate once. The cleaning plate 56 pushes the debris generated during drilling away from under the valve cover, preventing the debris from accumulating under the valve cover and causing the debris generated during drilling to not fall off in time, thus affecting the drilling quality and improving the drilling accuracy.

[0051] The flipping assembly includes a connecting rod 61 fixed to an L-shaped rod 55, a rack 62 rotatably connected to the connecting rod 61, a second spur gear 63 meshing with the rack 62 on a first rotating shaft 13, the number of teeth of the rack 62 being half the number of teeth of the second spur gear 63, a traction rod 621 on the rack 62, a diamond-shaped groove 64 adapted to the traction rod 621 on the support frame 12, a baffle 641 near the corner of the diamond-shaped groove 64 close to the first rotating shaft 13, and the baffle 641 rotatably connected to the side wall of the diamond-shaped groove 64;

[0052] When the L-shaped rod 55 moves, it drives the connecting rod 61 to move synchronously. When the connecting rod 61 moves towards the first rotating shaft 13, the traction rod 621 is located in the horizontal groove at the top of the diamond groove 64. At this time, the rack 62 is in a horizontal state and meshes with the second spur gear 63. When the rack 62 moves, it drives the second spur gear 63 to rotate 180°, thereby driving the first rotating shaft 13 and the rotating disk 14 to rotate 180° to exchange the positions of the finished valve cover and the unfinished valve cover, saving the waiting time for clamping, realizing continuous hole opening, strong work continuity, and high work efficiency. When the traction rod 621 moves to the horizontal groove at the bottom of the diamond groove 64, the rack 62 and the second spur gear 53 separate. During the return stroke of the connecting rod 61, it will not drive the rotating disk 13 to flip.

[0053] The working principle of this invention is as follows:

[0054] During operation, the valve cover to be processed is fixed on the rotating disk 14 by the clamp 2. The motor 41 is turned on, and the rotation of the motor 41 drives the second rotating shaft 42 and the incomplete gear 421 to rotate. The cylindrical pin 422 rotates synchronously around the central axis of the incomplete gear 421 and drives the rocker arm 45 to swing back and forth. Thus, under the action of the connecting rod 46, the bench drill 11 moves horizontally back and forth. When the cylindrical pin 422 is in the upper part of the incomplete gear 421, the bench drill 11 is in the feed state. At this time, the distance between the cylindrical pin 422 and the central shaft 44 is large, and the rocker arm 45 swings slowly with the rotation of the incomplete gear 421. The feed speed of the bench drill 11 is small, which allows the drill bit to enter slowly and smoothly when it contacts the valve cover, avoiding the impact and vibration caused by rapid feed, improving drilling accuracy and extending the service life of the drill bit.

[0055] When the cylindrical pin 422 is located in the lower half of the incomplete gear 421, the bench drill 11 is in the retracted state. At this time, the feed speed of the bench drill 11 is high, and the drill bit quickly exits from the hole, reducing the friction time of the drill bit in the hole, thereby reducing the wear of the drill bit and further extending the service life of the drill bit. By drilling holes at both ends of the valve cover simultaneously with two bench drills 11, the number of times the valve cover is flipped and repositioned is reduced, thereby reducing positioning errors and improving machining accuracy. Furthermore, by drilling holes at both ends simultaneously, the time required for drilling is greatly shortened, improving work efficiency and reducing the time cost of drilling.

[0056] When the drill bit is retracted, after it separates from the valve cover, the incomplete gear 421 meshes with the first spur gear 52. When the bench drill 11 returns to its initial position, the incomplete gear 421 separates from the first spur gear 52 again. During the process from the separation of the drill bit from the valve cover to the return of the bench drill 11 to its initial position, the incomplete gear 421 drives the first spur gear 52 to rotate one revolution. Under the action of the cam groove 511 and the limit rod 531, the movable plate 53 reciprocates once along the central axis of the first spur gear 52, thereby driving the L-shaped rod 55 and the cleaning plate 56 to reciprocate once. The cleaning plate 56 pushes the debris generated during drilling away from under the valve cover, preventing the debris from accumulating under the valve cover and causing the debris generated during drilling to not fall off in time, thus affecting the drilling quality and improving the drilling accuracy.

[0057] When the L-shaped rod 55 moves, it drives the connecting rod 61 to move synchronously. When the connecting rod 61 moves towards the first rotating shaft 13, the traction rod 621 is located in the horizontal groove at the top of the diamond groove 64. At this time, the rack 62 is in a horizontal state and meshes with the second spur gear 63. When the rack 62 moves, it drives the second spur gear 63 to rotate 180°, thereby driving the first rotating shaft 13 and the rotating disk 14 to rotate 180° to exchange the positions of the finished valve cover and the unfinished valve cover, saving the waiting time for clamping, realizing continuous hole opening, strong work continuity, and high work efficiency. When the traction rod 621 moves to the horizontal groove at the bottom of the diamond groove 64, the rack 62 and the second spur gear 53 separate. During the return stroke of the connecting rod 61, it will not drive the rotating disk 13 to flip.

[0058] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A vibration damping fixture for machining extended thin-walled, heavy-duty valve covers on a horizontal CNC lathe, characterized in that, include: The workbench (1) is provided with two symmetrically arranged bench drills (11), the workbench (1) is provided with a support frame (12), the support frame (12) is provided with a first rotating shaft (13), the first rotating shaft (13) is provided with a rotating disk (14), and the bottom of the workbench (1) is provided with a support leg (15). The clamps (2) are two in number and symmetrically distributed on the rotating disk (14), which is driven by a flipping assembly; A moving component is provided between the worktable (1) and the bench drill (11). The moving component includes a rectangular slot (31) opened on the worktable (1), a slider (32) is provided in the rectangular slot (31), a base (33) is fixed on the slider (32), and the bench drill (11) is located on the base (33). The moving component also includes a driving component and a feed speed adjustment component. The driving component includes a motor (41) fixed on the support leg (15), and the support leg (15) is provided with two second rotating shafts (42), each of the two second rotating shafts (42) is provided with a pulley (43), and the two pulleys are driven by a belt in a cross manner; The feed speed adjustment component includes an incomplete gear (421) fixed on the second rotating shaft (42), a cylindrical pin (422) on the incomplete gear (421), a central shaft (44) on the support leg (15), a rocker arm (45) rotatably connected to the central shaft (44), a U-shaped groove (451) on the rocker arm (45), the cylindrical pin (422) slidably connected in the U-shaped groove (451), a connecting rod (46) rotatably connected to the slider (32), and the end of the connecting rod (46) away from the slider (32) rotatably connected to the end of the rocker arm (45) away from the central shaft (44). The workbench (1) is provided with a cleaning assembly, which includes a third rotating shaft (51) rotatably connected to the support leg (15). A first spur gear (52) meshing with an incomplete gear (421) is fixed on the third rotating shaft (51). A movable plate (53) is provided on the third rotating shaft (51). A guide rod (54) penetrating the movable plate (53) is provided on the workbench (1). An L-shaped rod (55) is fixed on the movable plate (53). A cleaning plate (56) is fixed on the L-shaped rod (55). The number of teeth of the incomplete gear (421) is the same as the number of teeth of the first spur gear (52). A cam groove (511) is provided on the third rotating shaft (51). A limiting rod (531) adapted to the cam groove (511) is provided on the movable plate (53). When the incomplete gear (421) rotates one revolution, the movable plate (53) moves back and forth once along the axial direction of the third rotating shaft (51) under the action of the cam groove (511). The flipping assembly includes a connecting rod (61) fixed on an L-shaped rod (55), a rack (62) rotatably connected to the connecting rod (61), and a second spur gear (63) meshing with the rack (62) on the first rotating shaft (13). The number of teeth of the rack (62) is half the number of teeth of the second spur gear (63). The rack (62) is provided with a traction rod (621), and the support frame (12) is provided with a diamond groove (64) adapted to the traction rod (621). A baffle (641) is provided at the corner of the diamond groove (64) near the first rotating shaft (13). The baffle (641) is rotatably connected to the side wall of the diamond groove (64). When the L-shaped rod (55) moves, it drives the connecting rod (61) to move synchronously. When the connecting rod (61) moves towards the first rotating shaft (13), the traction rod (621) is located in the horizontal groove at the top of the diamond groove (64). At this time, the rack (62) is in a horizontal state and the rack (62) meshes with the second spur gear (63). When the rack (62) moves, it drives the second spur gear (63) to rotate 180°. When the traction rod (621) moves to the horizontal groove at the bottom of the diamond groove (64), the rack (62) and the second spur gear (63) separate. During the return stroke of the connecting rod (61), it will not drive the rotating disk (14) to flip.

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