Cold drawing equipment of precise seamless steel pipe for hydraulic front fork rod

Abstract

The invention discloses cold-drawing equipment of a precise seamless steel pipe for a hydraulic front fork rod, and relates to the technical field of cold-drawing equipment.The cold-drawing equipment comprises a workbench, a cold-drawing die, an oil coating mechanism, an oil removing mechanism and a drawing mechanism. Lubricating oil is evenly smeared on the surface of the seamless steel pipe through an oil supply ring and a ball of the oil coating mechanism, cold-drawing operation is carried out, and the precision of the seamless steel pipe is improved; meanwhile, a residue filtering pipe is automatically rotated to the position between an oil discharging pipe and a circulating oil pipe through an extrusion plate of the oil removing mechanism, so that a pipeline is communicated, a seamless steel pipe is heated through a conical rubber sleeve and an air heater, lubricating oil on the seamless steel pipe slides into an oil collecting shell, and impurities are filtered through a filter screen in the residue filtering pipe; and when the extrusion plate is separated from the seamless steel pipe, the residue filtering pipe rotates into the residue collecting box, and the residue filtering pipe collides with the residue collecting box for multiple times under the action of the spring, so that the filter screen is prevented from being blocked.

Description

Technical Field

[0001] The invention relates to the technical field of cold drawing equipment, and in particular to cold drawing equipment for a precision seamless steel pipe for a hydraulic front fork rod. Background Art

[0002] The precision seamless steel tube of the hydraulic front fork rod needs to be processed by cold drawing equipment during production. Before processing the seamless steel tube, the existing cold drawing equipment needs to evenly apply lubricating oil on the surface of the seamless steel tube. After the cold drawing is completed, in order to avoid the residual lubricating oil on the surface of the seamless steel tube affecting the processing of the next process, the lubricating oil on the surface of the seamless steel tube needs to be cleaned. Although the lubricating oil on the seamless steel tube is now scraped off by a conical rubber sleeve, some lubricating oil will remain if the cleaning is not thorough enough. In addition, some impurities will remain in the scraped lubricating oil. If it is directly reused, it will cause scratches on the surface of the seamless steel tube during cold drawing. Therefore, the above problems need to be solved. Summary of the invention

[0003] The object of the present invention is to provide a cold drawing device for a precision seamless steel pipe for a hydraulic front fork rod, so as to overcome the above-mentioned defects in the prior art.

[0004] A cold drawing device for a precision seamless steel pipe for a hydraulic front fork rod comprises a workbench, a cold drawing die, an oiling mechanism, an oil removal mechanism and a drawing mechanism. The cold drawing die is fixed on the workbench and is provided with a die hole. The workbench is provided with a plurality of supports for supporting the seamless steel pipe on one side of the cold drawing die.

[0005] The oiling mechanism is arranged on the side of the cold drawing die facing the support and is used to evenly apply lubricating oil to the seamless steel pipe;

[0006] The degreasing mechanism is arranged on the other side of the cold drawing die and performs surface degreasing and lubricating oil filtering and collection when the seamless steel pipe is cold drawn, and automatically dumps the residue after the seamless steel pipe is cold drawn.

[0007] The drawing mechanism is arranged on a workbench and is used for drawing the cold-drawn seamless steel pipe forward.

[0008] 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 is coaxially arranged with the die hole. An oil supply cavity is provided in the oil supply ring. A plurality of ball bearings are provided and are rollingly connected to the inner wall of the oil supply ring. The oil tank is arranged on a workbench and the oil pump is installed on the top of the oil tank. 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.

[0009] Preferably, the degreasing mechanism includes an oil collecting shell, a hot air blower, a slag filtering pipe, a guide rod and a spring. The oil collecting shell is coaxially arranged with the die hole of the cold drawing die and fixed to the cold drawing die through a plurality of fixing plates. An inlet pipe orifice is arranged on one side of the oil collecting shell facing the cold drawing die, and a conical rubber sleeve for scraping the lubricating oil on the surface of the seamless steel pipe is installed at the outlet pipe orifice on the other side. The hot air blower is installed on the top of the oil collecting shell and its air outlet is communicated with the inner cavity of the oil collecting shell. A drain pipe communicated with the oil collecting shell is arranged at the bottom of the oil collecting shell, and the lower end of the drain pipe is provided with a bottom inclined surface. The slag filtering pipe is located directly below the drain pipe and its side is rotatably connected to a vertical plate at the bottom of the oil collecting shell. The upper end of the slag filtering pipe is provided with a top inclined surface matching the bottom inclined surface and its lower end is provided with a bottom arc surface. A filter screen is arranged in the slag filtering pipe. A circulating oil pipe is connected to the side of the fuel tank, and a top arc surface matching the bottom arc surface is arranged on the circulating oil pipe. The guide rod is arranged on the workbench and a slider is slidably connected thereto. An anti-disengagement cap is arranged at the top of the guide rod. An extrusion plate is arranged on the side of the slider, and a driving inclined surface is arranged on the side of the top of the extrusion plate. The spring is sleeved on the guide rod and is located between the slider and the workbench. A driving plate is rotatably connected to the side of the slider through a pin shaft, and the driving plate is rotatably connected to a connecting plate on the slag filtering pipe through a pin shaft.

[0010] Preferably, the drawing mechanism includes a bracket, a moving frame, a motor and a cylinder. There are two brackets which are symmetrically arranged on the workbench. The moving frame is located on the two brackets and its bottom is slidably connected to one of the brackets. The motor is installed on the moving frame and a gear is installed on its output shaft. The gear meshes with a rack on the side of the other bracket. The cylinder is installed on the moving frame and the inner end of its piston rod is connected to a moving clamping block. The moving clamping block is slidably connected to the moving frame, and a fixed clamping block corresponding to the moving clamping block is also arranged on the moving frame.

[0011] Preferably, a slag collecting box is arranged on the side of the workbench where the slag filtering pipe is located, and a clamping groove matching the slag filtering pipe is arranged on the side wall of the slag collecting box.

[0012] Preferably, V-shaped grooves are arranged on the inner sides of the moving clamping block and the fixed clamping block, and rubber pads are arranged on the inner walls of each V-shaped groove.

[0013] Preferably, a rubber soft head is arranged on the top of the driving inclined surface of the extrusion plate.

[0014] Preferably, the main body of the bracket is in a "U" shape and the opening faces downward.

[0015] The present invention has the following advantages:

[0016] When the present invention is in use, lubricating oil is evenly applied to the surface of the seamless steel pipe through the oil supply ring and the ball of the oil coating mechanism to perform cold drawing operation, and at the same time, the filter residue pipe is automatically rotated to between the oil discharge pipe and the circulating oil pipe through the extrusion plate of the oil removal mechanism to connect the pipelines, and the seamless steel pipe is heated by the conical rubber sleeve and the hot air blower to make the lubricating oil on it slide into the oil collecting shell, and impurities are filtered through the filter screen in the filter residue pipe. The pressure automatically presses the lubricating oil 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 slag collecting box and the filter residue pipe is collided with the slag collecting box for multiple times through the action of the spring to prevent the filter screen from being blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 and Figure 2 It is a schematic diagram of the structure of the present invention at different angles.

[0018] Figure 3 It is a schematic diagram of the structure when the drawing mechanism is not installed in the present invention.

[0019] Figure 4 for Figure 3 A partial enlarged view of point A in the middle.

[0020] Figure 5 It is a schematic structural diagram of the oil collecting shell, the hot air blower and the oil drain pipe of the present invention.

[0021] Figure 6 and Figure 7 Schematic diagrams of the structure of the oil removal mechanism of the present invention at different angles.

[0022] Figure 8 It is a schematic diagram of the structure of the circulating oil pipe of the present invention.

[0023] Fig. 9 It is a schematic diagram of the structure of the present invention during cold drawing.

[0024] Among them: 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. exhaust hole, 5. oil removal mechanism, 51. oil collecting shell, 511. fixed plate, 512. vertical plate, 52. conical rubber sleeve, 53. hot air blower, 54. oil drain pipe, 541. bottom inclined surface, 55. filter residue 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-drop cap, 573, spring, 58, extrusion plate, 581, driving inclined plane, 582, rubber soft head, 59, driving plate, 591, connecting plate, 6, pulling mechanism, 61, bracket, 62, mobile frame, 63, motor, 64, gear, 65, rack, 66, cylinder, 67, mobile clamping block, 68, fixed clamping block, 7, slag collecting box, 71, clamping groove, 8, seamless steel pipe. DETAILED DESCRIPTION

[0025] The specific implementation modes of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, so as to help those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of the present invention.

[0026] like Figure 1-9 As shown, the present invention provides a cold drawing device for a precision seamless steel pipe for a hydraulic front fork rod, comprising 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 is provided with a die hole. The workbench 1 is provided with a plurality of supports 3 for supporting the seamless steel pipe 8 on one side of the cold drawing die 2. The oiling mechanism 4 is arranged 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 arranged on the other side of the cold drawing die 2 and performs surface degreasing and lubricating oil filtering and collection when the seamless steel pipe 8 is cold drawn. After the cold drawing of the seamless steel pipe 8 is completed, the residue is automatically dumped. The drawing mechanism 6 is arranged on the workbench 1 and is used to pull the cold-drawn seamless steel pipe 8 forward.

[0027] It should be noted that the oiling mechanism 4 includes an oil supply ring 41, a ball 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. An oil supply cavity is arranged in the oil supply ring 41. A plurality of balls 42 are provided and are rollingly connected to the inner wall of the oil supply ring 41. The oil tank 43 is arranged on the workbench 1 and the oil pump 44 is installed on the top thereof. The oil inlet of the oil pump 44 is connected to the oil tank 43 through an oil inlet pipe 45, and 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. An exhaust hole 47 is arranged above the oil tank 43 to facilitate the gas blown in by the hot air blower 53 to be discharged from the oil tank 43.

[0028] In addition, the degreasing mechanism 5 includes an oil collecting shell 51, a hot air blower 53, a slag filtering pipe 55, a guide rod 57 and a spring 573. The oil collecting shell 51 is coaxially arranged with the die hole of the cold drawing die 2 and is fixed to the cold drawing die 2 through a plurality of fixing plates 511. An inlet pipe opening is arranged on one side of the oil collecting shell 51 facing the cold drawing die 2, and a conical rubber sleeve 52 for scraping the lubricating oil on the surface of the seamless steel pipe 8 is installed at the outlet pipe opening on the other side. The hot air blower 53 is installed on the top of the oil collecting shell 51 and its air outlet is communicated with the inner cavity of the oil collecting shell 51. A drain pipe 54 communicated with the oil collecting shell 51 is arranged at the bottom of the oil collecting shell 51. The lower end of the drain pipe 54 is provided with a bottom inclined surface 541. The slag filtering pipe 55 is located directly below the drain pipe 54 and its side is rotatably connected to a vertical plate 512 at the bottom of the oil collecting shell 51. The upper end of the slag filtering pipe 55 is provided with a top inclined surface 551 matching the bottom inclined surface 541 and its lower end is provided with a bottom arc surface 552. A filter screen 553 is arranged in the slag filtering pipe 55. A slag collecting box 7 is arranged on the side of the workbench 1 for the slag filtering pipe 55. A clamping groove 71 matching the slag filtering pipe 55 is arranged on the side wall of the slag collecting box 7. A circulating oil pipe 56 is connected to the side of the fuel tank 43. A top arc surface 561 matching the bottom arc surface 552 is arranged on the circulating oil pipe 56. The guide rod 57 is arranged on the workbench 1 and a slider 571 is slidably connected thereto. A retaining cap 572 is arranged at the top of the guide rod 57. An extrusion plate 58 is arranged on the side of the slider 571. A driving inclined surface 581 is arranged on the side of the top of the extrusion plate 58. A rubber soft head 582 is arranged on the side of the top of the driving inclined surface 581 of the extrusion plate 58. The arranged rubber soft head 582 avoids scratching the surface of the seamless steel pipe 8. The spring 573 is sleeved on the guide rod 57 and is located between the slider 571 and the workbench 1. The side of the slider 571 is rotatably connected to a driving plate 59 through a pin shaft. The driving plate 59 and a connecting plate 591 on the slag filtering pipe 55 are rotatably connected through a pin shaft.

[0029] In addition, the drawing mechanism 6 includes a bracket 61, a moving frame 62, a motor 63 and a cylinder 66. There are two brackets 61 which are symmetrically arranged on the workbench 1. The main body of the bracket 61 is in a "U" shape with the opening facing downward. The moving frame 62 is located on the two brackets 61 and its bottom is slidably connected to one of the brackets 61. The motor 63 is installed on the moving frame 62 and a gear 64 is installed on its output shaft. The gear 64 meshes with a rack 65 on the side of the other bracket 61. The cylinder 66 is installed on the moving frame 62 and the inner end of its piston rod is connected to a moving clamping block 67. The moving clamping block 67 is slidably connected to the moving frame 62. A fixed clamping block 68 corresponding to the moving clamping block 67 is also arranged on the moving frame 62. V-shaped grooves are arranged on the inner sides of the moving clamping block 67 and the fixed clamping block 68. Rubber pads are arranged on the inner walls of each V-shaped groove. The arranged rubber pads avoid damaging the surface of the seamless steel pipe 8 when clamping.

[0030] Specific implementation manners and principles:

[0031] In actual application of the present invention, 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 die 2. The oil pump 44 draws the lubricating oil into the oil supply ring 41. When the seamless steel pipe 8 moves, the ball 42 in the oil supply ring 41 is driven to rotate, so that the lubricating oil is evenly applied to the surface of the seamless steel pipe 8. The seamless steel pipe 8 after cold drawing passes through the oil collecting shell 51 and the conical rubber sleeve 52. When the seamless steel pipe 8 moves, the driving inclined surface 581 of the extrusion plate 58 drives the slider 571 Move downward along the guide rod 57, the spring 573 is compressed, and the slider 571 moves while driving the filter pipe 55 from the slag collecting box 7 to between the oil discharge pipe 54 and the circulating oil pipe 56 through the driving plate 59 and the connecting plate 591. When the seamless steel pipe 8 is inserted between the movable clamping block 67 and the fixed clamping block 68, the movable clamping block 67 is driven by the cylinder 66 to move on the movable frame 62 to clamp and fix the seamless steel pipe 8. The motor 63 is turned on, and the gear 64 on the output shaft of the motor 63 rotates, driving the movable frame 62 to move on the bracket 61 along the rack 65, driving the seamless steel pipe 8 to move. The seamless steel pipe 8 is cold drawn, and the hot air blower 53 is started at the same time. The conical rubber sleeve 52 scrapes the lubricating oil and impurities on the surface of the seamless steel pipe 8 into the oil collecting shell 51. At the same time, the hot air blower 53 blows hot air into the oil collecting shell 51, which not only heats the lubricating oil on the surface of the seamless steel pipe 8 and slides into the oil collecting shell, but also increases the pressure in the oil collecting shell 51, and squeezes the lubricating oil through the oil discharge pipe 54 at the bottom of the oil collecting shell 51 into the filter residue pipe 55, and is filtered through the filter screen 553, and finally enters the oil tank 43 through the circulating oil pipe 56 for secondary use. When the seamless steel pipe 8 is cold drawn, the extrusion plate 58 and the seamless steel pipe 8 are squeezed and the oil is squeezed. Tube 8 is out of contact, and under the action of the elastic force of the spring 573 on the guide rod 57, the slider 571 moves up along the guide rod 57 and drives the filter residue pipe 55 to rotate into the slag collecting box 7 through the driving plate 59 and the connecting plate 591, and collides and strikes the clamping groove 71, so that the impurities on the filter screen 553 in the filter residue pipe 55 are dumped into the slag collecting box 7. Due to the characteristics of the spring 573, the filter residue pipe 55 will repeatedly collide and strike the slag collecting box 7, so that the impurities on the filter screen 553 in the filter residue pipe 55 are more thoroughly dumped into the slag collecting box, thereby avoiding the filter holes on the filter screen 553 from being blocked.

[0032] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the concept and technical solution of the present invention, or the present utility invention and technical solution are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A cold drawing equipment for precision seamless steel pipe for hydraulic front fork rod, characterized by: It comprises a workbench (1), a cold drawing die (2), an oiling mechanism (4), an oil removal mechanism (5) and a drawing mechanism (6), wherein the cold drawing die (2) is fixed on the workbench (1) and is provided with a die hole, and the workbench (1) is provided with a plurality of supports (3) for supporting a seamless steel pipe (8) on one side of the cold drawing die (2), and the oiling mechanism (4) is arranged 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), and the oil removal mechanism (5) is arranged on the other side of the cold drawing die (2) and performs surface oil removal and lubricating oil filtering and collection when the seamless steel pipe (8) is cold drawn, and automatically dumps the residue after the cold drawing of the seamless steel pipe (8) is completed, and the drawing mechanism (6) is arranged on the workbench (1) and is used to pull the cold drawn seamless steel pipe (8) forward; The pulling mechanism (6) comprises a bracket (61), a movable frame (62), a motor (63) and a cylinder (66). The bracket (61) is provided with two and symmetrically arranged on the workbench (1). The movable frame (62) is located on the two brackets (61) and its bottom is slidably connected to one of the brackets (61). The motor (63) is installed on the movable frame (62) and a gear (64) is installed on its output shaft. The gear (64) is meshed with a rack (65) on the side of the other bracket (61). The cylinder (66) is installed on the movable frame (62) and the inner end of its piston rod is connected to a movable clamping block (67). The movable clamping block (67) is slidably connected to the movable frame (62). The movable frame (62) is also provided with a fixed clamping block (68) corresponding to the movable clamping block (67).

2. The cold drawing equipment for a precision seamless steel pipe for a hydraulic front fork rod according to claim 1 is characterized in that: The oiling mechanism (4) comprises an oil supply ring (41), a ball (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. An oil supply cavity is arranged in the oil supply ring (41). A plurality of ball (42) are provided and are rollingly connected to the inner wall of the oil supply ring (41). The oil tank (43) is arranged on the workbench (1) and the oil pump (44) is installed on the top of the oil tank. The oil inlet of the oil pump (44) is connected to the oil tank (43) through an oil inlet pipe (45), and 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). An exhaust hole (47) is arranged above the oil tank (43).

3. The cold drawing equipment for a precision seamless steel pipe for a hydraulic front fork rod according to claim 2 is characterized in that: The degreasing mechanism (5) includes an oil collecting shell (51), a hot air blower (53), a slag filtering pipe (55), a guide rod (57) and a spring (573). The oil collecting shell (51) is coaxially arranged with the die hole of the cold drawing die (2) and fixed to the cold drawing die (2) through a plurality of fixing plates (511). An inlet pipe opening is provided on one side of the oil collecting shell (51) facing the cold drawing die (2), and a conical rubber sleeve (52) for scraping the lubricating oil on the surface of the seamless steel pipe (8) is installed at the outlet pipe opening on the other side. The hot air blower (53) is installed on the top of the oil collecting shell (51) and its air outlet is communicated with the inner cavity of the oil collecting shell (51). A drain pipe (54) communicated with the oil collecting shell (51) is provided at the bottom of the oil collecting shell (51), and a bottom inclined surface (541) is provided at the lower end of the drain pipe (54). The slag filtering pipe (55) is located directly below the drain pipe (54) and its side is rotatably connected to a vertical plate (512) at the bottom of the oil collecting shell (51). A top inclined surface (551) matching the bottom inclined surface (541) is provided at the upper end of the slag filtering pipe (55), and a bottom arc surface (552) is provided at the lower end. A filter screen (553) is provided in the slag filtering pipe (55). A circulating oil pipe (56) is connected to the side of the fuel tank (43), and a top arc surface (561) matching the bottom arc surface (552) is provided on the circulating oil pipe (56). The guide rod (57) is arranged on the workbench (1) and a slider (571) is slidably connected thereto. An anti - detachment cap (572) is provided at the top of the guide rod (57). An extrusion plate (58) is provided on the side of the slider (571), and a driving inclined surface (581) is provided on the side surface at the top of the extrusion plate (58). The spring (573) is sleeved on the guide rod (57) and is located between the slider (571) and the workbench (1). A driving plate (59) is rotatably connected to the side of the slider (571) through a pin shaft, and the driving plate (59) is rotatably connected to a connecting plate (591) on the slag filtering pipe (55) through a pin shaft.

4. The cold drawing equipment for a precision seamless steel pipe for a hydraulic front fork rod according to claim 3 is characterized in that: A slag collecting box (7) is provided on the side of the workbench (1) where the slag filtering pipe (55) is located, and a clamping groove (71) matching the slag filtering pipe (55) is provided on the side wall of the slag collecting box (7).

5. The cold drawing equipment for a precision seamless steel pipe for a hydraulic front fork rod according to claim 1 is characterized in that: V - shaped grooves are provided on the inner sides of the movable clamping block (67) and the fixed clamping block (68), and rubber pads are provided on the inner walls of each V - shaped groove.

6. The cold drawing equipment for a precision seamless steel pipe for a hydraulic front fork rod according to claim 3 is characterized in that: A rubber soft head (582) is provided at the top of the driving inclined surface (581) of the extrusion plate (58).

7. The cold drawing equipment for a precision seamless steel pipe for a hydraulic front fork rod according to claim 3 is characterized in that: The main body of the bracket (61) is in a "U" shape with the opening facing downwards.

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