A seamless steel tube cold-drawing device for hydraulic front fork rods

Abstract

The application discloses a seamless steel pipe cold-drawing device for hydraulic front fork rods and relates to the technical field of cold-drawing equipment, which comprises a workbench, a cold-drawing die, an oiling mechanism, an oil removing mechanism and a drawing mechanism. The oiling mechanism is provided with an oil supply ring and balls for uniformly applying lubricating oil to the surface of the seamless steel pipe, and the cold-drawing operation is performed. Meanwhile, the extrusion plate of the oil removing mechanism automatically rotates the filter residue pipe between the oil discharge pipe and the circulating oil pipe, connects the pipelines, heats the seamless steel pipe through the conical rubber sleeve and the air heater, and makes the lubricating oil on the seamless steel pipe slide into the oil collecting shell. The impurities are filtered through the filter screen in the filter residue pipe, and the lubricating oil is automatically pressed into the oil tank for recycling. When the extrusion plate is separated from the seamless steel pipe, the filter residue pipe is rotated into the residue collecting tank and collides with the residue collecting tank for multiple times through the action of the spring, so that the filter screen is prevented from being blocked.

Description

Technical Field

[0001] This invention relates to the technical field of cold drawing equipment, and more specifically to a cold drawing device for seamless steel pipes used in hydraulic front fork rods. Background Technology

[0002] The precision seamless steel tubes for hydraulic front forks require cold drawing during production. Existing cold drawing equipment involves uniformly applying lubricating oil to the surface of the seamless steel tube before processing. After cold drawing, to prevent residual lubricating oil from affecting subsequent processing, the oil needs to be thoroughly cleaned. While conical rubber sleeves are currently used to scrape off the lubricating oil, this is not always thorough and some oil remains. Furthermore, the scraped-off oil contains impurities, which can cause scratches on the surface of the seamless steel tube during cold drawing if reused directly. Therefore, these issues need to be addressed. Summary of the Invention

[0003] The purpose of this invention is to provide a seamless steel tube cold drawing device for hydraulic front fork rods, so as to overcome the above-mentioned defects in the prior art.

[0004] A cold drawing device for seamless steel pipes for hydraulic front forks includes a worktable, a cold drawing die, an oiling mechanism, an oil removal mechanism, and a drawing mechanism. The cold drawing die is fixed on the worktable and has die holes. The worktable has several supports on one side of the cold drawing die for supporting the seamless steel pipe. The oiling mechanism is located on the side of the cold drawing die facing the supports and is used to evenly apply lubricating oil to the seamless steel pipe. The oil removal mechanism is located on the other side of the cold drawing die and performs surface degreasing and lubricating oil filtration and collection during the cold drawing of the seamless steel pipe. After the seamless steel pipe is cold drawn, the device automatically dumps the residue. The drawing mechanism is located on the worktable and is used to pull the cold-drawn seamless steel pipe forward.

[0005] The drawing mechanism includes a movable frame, a drive screw, a motor, and a cylinder. One side of the bottom of the movable frame is slidably connected to a guide rod on the worktable, and the other side is screwed to the drive screw on the worktable via a screw nut. The motor is mounted on the side of the worktable, and its output shaft is connected to the drive screw. The cylinder body is hinged to the side of the movable frame via a pin. A pressure plate is hinged to the upper end of the piston rod of the cylinder via a pin. The pressure plate is hinged to the movable frame via a pin. A pressure block is provided at the bottom of the pressure plate, and a limit block corresponding to the pressure block is provided on the movable frame.

[0006] Preferably, the oiling mechanism includes an oil supply ring, ball bearings, an oil tank, and an oil pump. The oil supply ring is fixed on the cold drawing die and coaxially arranged with the die hole. The oil supply ring has an oil supply cavity. Several ball bearings are provided and are tumblingly connected to the inner wall of the oil supply ring. The oil tank is located on the workbench and the oil pump is installed on its top. The oil inlet of the oil pump is connected to the oil tank through an oil inlet pipe, and the oil outlet of the oil pump is connected to the oil supply cavity of the oil supply ring through an oil outlet pipe. An exhaust hole is provided above the oil tank.

[0007] Preferably, the oil removal mechanism includes an oil collecting shell, a hot air blower, a filter pipe, a guide rod, and a spring. The oil collecting shell is coaxially arranged with the die hole of the cold drawing die and is fixed to the cold drawing die by several fixing plates. The oil collecting shell has an inlet on one side facing the cold drawing die, and a conical rubber sleeve for scraping off the lubricating oil on the surface of the seamless steel pipe is installed at the outlet on the other side. The hot air blower is installed on the top of the oil collecting shell, and its outlet is connected to the inner cavity of the oil collecting shell. The bottom of the oil collecting shell has an oil drain pipe connected to the oil collecting shell, and the lower end of the oil drain pipe has a bottom inclined surface. The filter pipe is located directly below the oil drain pipe, and its side is rotatably connected to the oil collecting shell. On the vertical plate at the bottom of the shell, the upper end of the filter cake tube is provided with a top inclined surface that matches the bottom inclined surface, and the lower end is provided with a bottom arc surface. A filter screen is provided in the filter cake tube. A circulating oil pipe is connected to the side of the oil tank. The circulating oil pipe is provided with a top arc surface that matches the bottom arc surface. The guide rod is provided on the worktable and a slider is slidably connected to it. The top of the guide rod is provided with an anti-detachment cap. The side of the slider is provided with a pressing plate. The side of the top of the pressing plate is provided with a driving inclined surface. The spring is sleeved on the guide rod and located between the slider and the worktable. The side of the slider is rotatably connected to the driving plate through a pin. The driving plate is rotatably connected to the connecting plate on the filter cake tube through a pin.

[0008] Preferably, the workbench is provided with a slag collection box on the side of the filter slag tube, and the side wall of the slag collection box is provided with a snap-fit ​​groove that cooperates with the filter slag tube.

[0009] Preferably, the inner sides of the pressure block and the limiting block are provided with V-shaped grooves, and each V-shaped groove has a rubber pad on its inner wall.

[0010] Preferably, the extrusion plate has a rubber soft head at the top of the driving ramp.

[0011] Preferably, each support has a limiting groove at the top that mates with a seamless steel pipe.

[0012] The present invention has the following advantages:

[0013] In use, the oil supply ring and ball bearings of the oiling mechanism evenly apply lubricating oil to the surface of the seamless steel pipe for cold drawing. Simultaneously, the extrusion plate of the degreasing mechanism automatically rotates the filter pipe between the oil discharge pipe and the circulating oil pipe, connecting the pipelines. The seamless steel pipe is heated by a conical rubber sleeve and a hot air blower, causing the lubricating oil on it to slide into the oil collection shell. Impurities are filtered through the filter screen in the filter pipe. Pressure automatically forces the lubricating oil into the oil tank for recycling. When the extrusion plate separates from the seamless steel pipe, the filter pipe rotates into the slag collection box, and the spring action causes the filter pipe to collide with the slag collection box multiple times, preventing the filter screen from clogging. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 for Figure 1 A structural schematic diagram of a partial enlarged view at point A in the middle.

[0016] Figure 3 for Figure 1 A schematic diagram of the structure without seamless steel pipes installed.

[0017] Figure 4 This is a schematic diagram of the structure of the present invention without the pull-out mechanism installed.

[0018] Figure 5 for Figure 4 A magnified view of a section at point B.

[0019] Figure 6 This is a schematic diagram of the structure of the oil collection tank, hot air blower and oil drain pipe of the present invention.

[0020] Figure 7 and Figure 8 This is a schematic diagram of the oil removal mechanism of the present invention from different angles.

[0021] Figure 9 This is a schematic diagram of the circulating oil pipe of the present invention.

[0022] The components include: 1. Workbench; 2. Cold drawing die; 3. Support; 4. Oiling mechanism; 41. Oil supply ring; 42. Ball bearing; 43. Oil tank; 44. Oil pump; 45. Oil inlet pipe; 46. Oil outlet pipe; 47. Vent; 5. Oil removal mechanism; 51. Oil collection shell; 511. Fixing plate; 512. Vertical plate; 52. Conical rubber sleeve; 53. Hot air blower; 54. Oil drain pipe; 541. Bottom inclined surface; 55. Filter pipe; 551. Top inclined surface; 552. Bottom arc surface; 553. Filter screen. 56. Circulating oil pipe; 561. Top arc surface; 57. Guide rod; 571. Slider; 572. Anti-detachment cap; 573. Spring; 58. Extrusion plate; 581. Drive inclined surface; 582. Rubber soft head; 59. Drive plate; 591. Connecting plate; 6. Pulling mechanism; 61. Moving frame; 62. Guide rod; 63. Drive screw; 64. Motor; 65. Cylinder; 66. Pressure plate; 67. Pressure block; 68. Limiting block; 7. Slag collection box; 71. Snap-fit ​​groove; 8. Seamless steel pipe. Detailed Implementation

[0023] The following detailed description of the embodiments, with reference to the accompanying drawings, will further illustrate the specific implementation of the present invention, in order to help those skilled in the art to have a more complete, accurate, and in-depth understanding of the concept and technical solutions of the present invention.

[0024] like Figure 1-9 As shown, the present invention provides a seamless steel tube cold drawing device for hydraulic front fork rods, including a workbench 1, a cold drawing mold 2, an oiling mechanism 4, an oil removal mechanism 5, and a drawing mechanism 6. The cold drawing mold 2 is fixed on the workbench 1 and has a mold hole. The workbench 1 has several supports 3 on one side of the cold drawing mold 2 for supporting the seamless steel tube 8. Each support 3 has a limiting groove on its top that cooperates with the seamless steel tube 8, so as to limit the seamless steel tube 8 on the support 3. The oiling mechanism 4 is located on the side of the cold drawing mold 2 facing the support 3 and is used to evenly apply lubricating oil to the seamless steel tube 8. The oil removal mechanism 5 is located on the other side of the cold drawing mold 2 and performs surface degreasing and lubricating oil filtration and collection during the cold drawing of the seamless steel tube 8. After the seamless steel tube 8 is cold drawn, the residue is automatically dumped. The drawing mechanism 6 is located on the workbench 1 and is used to pull the cold-drawn seamless steel tube 8 forward.

[0025] It should be noted that the pulling mechanism 6 includes a movable frame 61, a drive screw 63, a motor 64, and a cylinder 65. One side of the bottom of the movable frame 61 is slidably connected to the guide rod 62 on the worktable 1, and the other side is screwed to the drive screw 63 on the worktable 1 through a screw nut. The motor 64 is mounted on the side of the worktable 1 and its output shaft is connected to the drive screw 63. The cylinder body of the cylinder 65 is hinged to the side of the movable frame 61 through a pin. The upper end of the piston rod of the cylinder 65 is hinged to a pressure plate 66 through a pin. The pressure plate 66 is hinged to the movable frame 61 through a pin. The bottom of the pressure plate 66 is provided with a pressure block 67. The movable frame 61 is provided with a limiting block 68 corresponding to the pressure block 67. The inner sides of the pressure block 67 and the limiting block 68 are provided with V-shaped grooves. Each V-shaped groove has a rubber pad on its inner wall. The rubber pads are used to prevent damage to the surface of the seamless steel pipe 8 during clamping.

[0026] In addition, the oiling mechanism 4 includes an oil supply ring 41, ball bearings 42, an oil tank 43, and an oil pump 44. The oil supply ring 41 is fixed on the cold drawing die 2 and is coaxially arranged with the die hole. The oil supply ring 41 has an oil supply cavity. Several ball bearings 42 are provided and are rolled and connected to the inner wall of the oil supply ring 41. The oil tank 43 is located on the workbench 1 and the oil pump 44 is installed on its top. The oil inlet of the oil pump 44 is connected to the oil tank 43 through the oil inlet pipe 45. The oil outlet of the oil pump 44 is connected to the oil supply cavity of the oil supply ring 41 through the oil outlet pipe 46. The oil tank 43 has an exhaust hole 47 above it to facilitate the exhaust of the gas blown in by the hot air blower 53 from the oil tank 43.

[0027] In addition, the oil removal mechanism 5 includes an oil collection shell 51, a hot air blower 53, a filter pipe 55, a guide rod 57, and a spring 573. The oil collection shell 51 is coaxially arranged with the die hole of the cold drawing die 2 and is fixed to the cold drawing die 2 by several fixing plates 511. The oil collection shell 51 has an inlet on one side facing the cold drawing die 2, and a conical rubber sleeve 52 for scraping off the lubricating oil on the surface of the seamless steel pipe 8 is installed at the outlet on the other side. The hot air blower 53 is installed on the top of the oil collection shell 51 and its air outlet is... The oil collection shell 51 is connected to the inner cavity of the oil collection shell 51. The bottom of the oil collection shell 51 is provided with an oil drain pipe 54 that communicates with the oil collection shell 51. The lower end of the oil drain pipe 54 has a bottom inclined surface 541. The filter slag pipe 55 is located directly below the oil drain pipe 54 and its side is rotatably connected to the vertical plate 512 at the bottom of the oil collection shell 51. The upper end of the filter slag pipe 55 has a top inclined surface 551 that cooperates with the bottom inclined surface 541, and its lower end has a bottom arc surface 552. A filter screen 553 is provided in the filter slag pipe 55. The workbench 1 is located on the filter slag pipe 55. A slag collection box 7 is provided on the side of the oil tank 43. A snap-fit ​​groove 71 is provided on the side wall of the slag collection box 7 to engage with the filter pipe 55. The filter pipe 55 strikes the snap-fit ​​groove 71, causing the residue on the filter screen 553 to fall into the slag collection box 7. A circulating oil pipe 56 is connected to the side of the oil tank 43. The circulating oil pipe 56 has a top arc surface 561 that engages with the bottom arc surface 552. The guide rod 57 is mounted on the workbench 1, and a slider 571 is slidably connected to it. An anti-detachment cap 572 is provided on the top of the guide rod 57. The slider 571 has a side... The surface is provided with an extrusion plate 58, and the side of the top of the extrusion plate 58 is provided with a driving slope 581. The extrusion plate 58 is provided with a rubber soft head 582 on the top of the driving slope 581. The rubber soft head 582 is provided to prevent scratches on the surface of the seamless steel pipe 8. The spring 573 is sleeved on the guide rod 57 and located between the slider 571 and the worktable 1. The side of the slider 571 is rotatably connected to the driving plate 59 through a pin. The driving plate 59 is rotatably connected to the connecting plate 591 on the filter pipe 55 through a pin.

[0028] Detailed implementation methods and principles:

[0029] In practical application, the seamless steel pipe 8 to be cold-drawn is placed on the support of the workbench 1 and the oil pump 44 is started. Then, the seamless steel pipe 8 is moved so that one end of the seamless steel pipe 8 is inserted into the die hole of the cold drawing mold 2. The oil pump 44 draws lubricating oil into the oil supply ring 41. When the seamless steel pipe 8 moves, it drives the ball bearings 42 in the oil supply ring 41 to rotate, so that the lubricating oil is evenly coated on the surface of the seamless steel pipe 8. After cold drawing, the seamless steel pipe 8 passes through the oil collection shell 51 and the conical rubber sleeve 52. When the seamless steel pipe 8 moves, the sliding block 571 is driven by the driving inclined surface 581 of the extrusion plate 58 along the... As the guide rod 57 moves downward, the spring 573 is compressed. Simultaneously, the slider 571 moves, driving the filter pipe 55 from the slag collection box 7 to between the oil discharge pipe 54 and the circulating oil pipe 56 via the drive plate 59 and connecting plate 591. When the seamless steel pipe 8 is inserted into the V-groove of the limiting block, the piston rod of the control cylinder 65 drives the pressure plate 66 to rotate. The pressure block 67 on the pressure plate 66 clamps and fixes the seamless steel pipe 8. The motor 64 is then turned on, and the output shaft of the motor 64 drives the drive screw 63 to rotate, moving the moving frame 61 along the guide rod 62, thereby driving... During the cold drawing of the seamless steel pipe 8, the hot air blower 53 is started simultaneously. The conical rubber sleeve 52 scrapes the lubricating oil and impurities on the surface of the seamless steel pipe 8 into the oil collection shell 51. At the same time, the hot air blown by the hot air blower 53 into the oil collection shell 51 not only heats the lubricating oil on the surface of the seamless steel pipe 8 and slides it into the oil collection shell, but also increases the pressure inside the oil collection shell 51, forcing the lubricating oil through the oil discharge pipe 54 at the bottom of the oil collection shell 51 into the filter slag pipe 55, where it is filtered by the filter screen 553. Finally, it enters the oil tank 43 through the circulating oil pipe 56 for secondary use. After the cold drawing of the seamless steel pipe 8 is completed, the extrusion plate 58 and the seamless steel pipe 8 are connected. When tube 8 is disengaged, under the action of the spring 573 on the guide rod 57, the slider 571 moves upward along the guide rod 57 and drives the filter tube 55 to rotate into the slag collection box 7 through the drive plate 59 and the connecting plate 591. The filter tube 55 then collides and strikes the snap-fit ​​groove 71, causing the impurities on the filter screen 553 in the filter tube 55 to be poured into the slag collection box 7. Due to the characteristics of the spring 573, the filter tube 55 will repeatedly collide and strike the slag collection box 7, making the impurities on the filter screen 553 in the filter tube 55 more thoroughly poured into the slag collection box, thus preventing the filter holes on the filter screen 553 from being blocked.

[0030] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the concept and technical solution of the present invention, or the direct application of the present invention and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A seamless steel tube cold-drawing device for hydraulic front fork rods, characterized in that: The system includes a workbench (1), a cold drawing die (2), an oiling mechanism (4), an oil removal mechanism (5), and a drawing mechanism (6). The cold drawing die (2) is fixed on the workbench (1) and has a die hole. The workbench (1) has several supports (3) on one side of the cold drawing die (2) for supporting the seamless steel pipe (8). The oiling mechanism (4) is located on the side of the cold drawing die (2) facing the supports (3) and is used to evenly apply lubricating oil to the seamless steel pipe (8). The oil removal mechanism (5) is located on the other side of the cold drawing die (2) and performs surface degreasing and lubricating oil filtration and collection during the cold drawing of the seamless steel pipe (8). After the seamless steel pipe (8) is cold drawn, the residue is automatically dumped. The drawing mechanism (6) is located on the workbench (1) and is used to pull the cold-drawn seamless steel pipe (8) forward. The pulling mechanism (6) includes a movable frame (61), a drive screw (63), a motor (64), and a cylinder (65). One side of the bottom of the movable frame (61) is slidably connected to a guide rod (62) on the workbench (1), and the other side is screwed to the drive screw (63) on the workbench (1) through a screw nut. The motor (64) is installed on the side of the workbench (1) and its output shaft is connected to the drive screw (63). The cylinder body of the cylinder (65) is hinged to the side of the movable frame (61) through a pin. The upper end of the piston rod of the cylinder (65) is hinged to a pressure plate (66) through a pin. The pressure plate (66) is hinged to the movable frame (61) through a pin. The bottom of the pressure plate (66) is provided with a pressure block (67). The movable frame (61) is provided with a limit block (68) corresponding to the pressure block (67). The oiling mechanism (4) includes an oil supply ring (41), ball bearings (42), an oil tank (43), and an oil pump (44). The oil supply ring (41) is fixed on the cold drawing die (2) and is coaxially arranged with the die hole. The oil supply ring (41) has an oil supply cavity. The ball bearings (42) are arranged in a plurality of units and are rolled and connected to the inner wall of the oil supply ring (41). The oil tank (43) is located on the workbench (1) and the oil pump (44) is installed on its top. The oil inlet of the oil pump (44) is connected to the oil tank (43) through an oil inlet pipe (45). The oil outlet of the oil pump (44) is connected to the oil supply cavity of the oil supply ring (41) through an oil outlet pipe (46). The oil tank (43) has an exhaust hole (47) above it. The oil removal mechanism (5) includes an oil collection shell (51), a hot air blower (53), a filter pipe (55), a guide rod (57), and a spring (573). The oil collection shell (51) is coaxially arranged with the die hole of the cold drawing die (2) and is fixed to the cold drawing die (2) by several fixing plates (511). The oil collection shell (51) has an inlet on one side facing the cold drawing die (2), and a conical rubber rod for scraping off the lubricating oil on the surface of the seamless steel pipe (8) is installed at the outlet on the other side. The sleeve (52) is installed on the top of the oil collecting shell (51), and its air outlet is connected to the inner cavity of the oil collecting shell (51). The bottom of the oil collecting shell (51) is provided with an oil drain pipe (54) connected to the oil collecting shell (51). The lower end of the oil drain pipe (54) is provided with a bottom inclined surface (541). The filter slag pipe (55) is located directly below the oil drain pipe (54) and its side is rotatably connected to the vertical plate (512) at the bottom of the oil collecting shell (51). The filter slag pipe (55) The upper end is provided with a top inclined surface (551) that matches the bottom inclined surface (541), and the lower end is provided with a bottom arc surface (552). A filter screen (553) is provided in the filter pipe (55). A circulating oil pipe (56) is connected to the side of the oil tank (43). A top arc surface (561) that matches the bottom arc surface (552) is provided on the circulating oil pipe (56). The second guide rod (57) is provided on the workbench (1) and a slider (571) is slidably connected to it. The top of the second guide rod (57) The part is provided with an anti-detachment cap (572), the side of the slider (571) is provided with an extrusion plate (58), the side of the top of the extrusion plate (58) is provided with a driving slope (581), the spring (573) is sleeved on the guide rod (57) and located between the slider (571) and the worktable (1), the side of the slider (571) is rotatably connected to the driving plate (59) by a pin, and the driving plate (59) is rotatably connected to the connecting plate (591) on the filter tube (55) by a pin; The workbench (1) has a slag collection box (7) on the side of the filter tube (55), and the side wall of the slag collection box (7) has a snap-fit ​​groove (71) that cooperates with the filter tube (55).

2. The seamless steel tube cold drawing device for a hydraulic front fork as described in claim 1, characterized in that: The inner sides of the pressure block (67) and the limiting block (68) are provided with V-shaped grooves, and each V-shaped groove has a rubber pad on its inner wall.

3. The seamless steel tube cold drawing device for a hydraulic front fork as described in claim 1, characterized in that: The extrusion plate (58) has a rubber soft head (582) on the top of the drive slope (581).

4. A seamless steel tube cold-drawing device for a hydraulic front fork as described in claim 1, characterized in that: Each support (3) has a limiting groove at its top that mates with the seamless steel pipe (8).

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