Shaft sleeve press-fitting die and shaft sleeve press-fitting method

Abstract

The invention relates to the technical field of press-fitting dies, and discloses a shaft sleeve press-fitting die which comprises a base, the top surface of the base is fixedly connected with a bottom plate, the lower surface of the bottom plate is connected with a side plate and an L-shaped plate through bolts, a lubricating oil storage assembly is arranged between the side plate and the L-shaped plate, and the upper surface of the bottom plate is connected with an oil injection assembly and a sliding rail through screws. The outer surfaces of the sliding rails are slidably connected with sliding blocks, the top faces of the sliding blocks are connected with a lower die through bolts, and the upper surface of the bottom plate is in threaded connection with guide rods. By arranging the lubricating oil storage assembly, the oil injection assembly and the upper die with the micropore channel, automatic oil injection is achieved in the press-fitting process; lubricating oil in the oil storage cylinder is extruded into the column casing by starting the stepping motor, the pressing rod is driven to extrude the lubricating oil in the column casing when the pressing machine presses downwards, the lubricating oil is injected into the oil injection rod through the oil injection nozzle, then the lubricating oil is smeared on the surfaces of a shaft sleeve and a workpiece shaft hole through the micropore channel, scratches caused by dry friction between the shaft sleeve and a mold are avoided, and the surface smoothness of the shaft sleeve is protected.

Description

Technical Field

[0001] The present invention relates to the technical field of press-fitting molds, and particularly to a bushing press-fitting mold and a bushing press-fitting method. Background Art

[0002] As a key tooling equipment in the field of mechanical manufacturing, the bushing press-fitting mold is mainly used to accurately and firmly install the bushing onto the shaft parts. During the operation of many mechanical equipment, the bushing plays important roles such as reducing friction, protecting the shaft body, and improving the overall stability of the equipment. The design and performance of the bushing press-fitting mold directly affect the installation quality and efficiency of the bushing.

[0003] At present, the vast majority of bushing press-fitting molds are not equipped with an automatic oil injection structure. During the bushing press-fitting process, the bushing is in close contact with the mold surface and generates relative sliding. Due to the lack of timely and uniform lubrication, the frictional force between the two is relatively large, and it is extremely easy to leave scratches on the surface of the bushing. Once scratches appear on the surface of the bushing, it will not only reduce the surface quality of the bushing itself and affect its aesthetics, but more importantly, it will weaken the wear resistance and corrosion resistance of the bushing in actual use and shorten the service life of the bushing. The traditional solution is to rely on manual application of lubricant. This method is not only extremely inefficient and difficult to meet the production requirements of large-scale and high-efficiency, but also it is very difficult to ensure the uniformity of the lubricant application by manual operation, further exacerbating the quality problems caused by uneven friction during the bushing press-fitting process, seriously restricting the quality and production efficiency of the bushing press-fitting. Summary of the Invention

[0004] (I) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the present invention provides a bushing press-fitting mold and a bushing press-fitting method, which have a microporous oil seepage structure and can automatically inject lubricating oil when press-fitting the bushing, protecting the surface finish of the bushing and other advantages, and solving the above technical problems.

[0006] (II) Technical Solutions

[0007] To achieve the above object, the present invention provides the following technical solution: A bushing press-fitting mold, including a base, the top surface of the base is fixedly connected with a bottom plate, the lower surface of the bottom plate is bolted with side plates and L-shaped plates, a lubricating oil storage assembly is arranged between the side plates and the L-shaped plates, the upper surface of the bottom plate is screwed with an oil injection assembly and a slide rail, the outer surface of the slide rail is slidably connected with a slider, the top surface of the slider is bolted with a lower mold, the upper surface of the bottom plate is threadedly connected with a guide rod, the outer surface of the guide rod is slidably connected with a top plate, the lower surface of the top plate is screwed with a sleeve, the upper mold is inserted into the sleeve, and a return spring is sleeved on the outer surface of the guide rod;

[0008] The oil injection assembly includes a cylinder barrel, with a plunger closely attached to the inner wall of the cylinder barrel. A pressure rod is threadedly connected inside the plunger. The top end of the cylinder barrel is threadedly connected with a cylinder cover. The outer surface of the pressure rod is threadedly connected with a lower knob and an L-shaped block, and the top end of the pressure rod is fixedly connected with an upper knob. A hose is threadedly connected to the outer surface of the cylinder barrel near the bottom end, and an oil injection nozzle is clamped at one end of the hose.

[0009] The upper mold includes an oil injection rod, and a mold head is integrally connected to one end of the oil injection rod. Microporous channels are formed on the outer peripheral surface and the bottom surface of the mold head.

[0010] As a preferred technical solution of the present invention, a pressing block is fixedly connected to the upper surface of the top plate. The oil injection rod is inserted into the sleeve, and a locking bolt is threadedly connected to the outer wall of the sleeve, with the locking bolt abutting against the oil injection rod.

[0011] As a preferred technical solution of the present invention, two slide rails are bolted to the upper surface of the bottom plate. A cavity is formed on the upper surface of the lower mold for placing the workpiece to be press-fitted, and a handle is screwed to the front end of the lower mold.

[0012] As a preferred technical solution of the present invention, the lubricating oil storage assembly includes an oil storage cylinder. An oil outlet nozzle is threadedly connected to one end of the oil storage cylinder, and an end cover is threadedly connected to the other end of the oil storage cylinder. A stepping motor is installed on the end face of the end cover, and a screw rod is fixedly connected to the output end of the stepping motor. A sliding sleeve is threadedly connected to the outer surface of the screw rod. A piston plate is sleeved on the outer surface of the sliding sleeve, and a cover plate is fixedly connected to one end of the sliding sleeve. A limit pin is fixedly connected to the end face of the cover plate.

[0013] As a preferred technical solution of the present invention, the lubricating oil storage assembly further includes an oil delivery pipe. One end of the oil delivery pipe is threadedly connected to the oil outlet nozzle, and the other end of the oil delivery pipe is threadedly connected to a one-way valve. One end of the one-way valve is threadedly connected to the bottom end of the cylinder barrel. The oil storage cylinder is filled with lubricating oil, and a limit rod is slidably connected to the outer peripheral surface of the piston plate.

[0014] As a preferred technical solution of the present invention, two limit pins are fixedly connected to the end face of the cover plate. The limit pins are inserted into the piston plate. The L-shaped plate is threadedly connected to the end cover by bolts. A jack is formed through the outer surface of the side plate, and the oil outlet nozzle is inserted into the jack.

[0015] As a preferred technical solution of the present invention, an oil injection nozzle is threadedly connected to the outer surface of the sleeve. The oil injection nozzle is communicated with the oil injection rod. The cylinder barrel is screwed to the upper surface of the bottom plate.

[0016] As a preferred technical solution of the present invention, the L-shaped block is connected to the rear side of the top plate by bolts, and a threaded hole is penetrated through the lower surface of the top plate. The threaded hole is threadedly connected to the pressure rod, and the lower knob is attached to the lower surface of the L-shaped block.

[0017] As a preferred technical solution of the present invention, a plurality of micro-hole channels are penetrated through the outer peripheral surface and the bottom surface of the die head around its axis direction. The micro-hole channels are communicated with the internal channels of the oil injection rod, and the diameter of the micro-hole channels is one millimeter.

[0018] The present invention also provides a method for press-fitting a bushing, which is carried out according to the following steps:

[0019] S1. Install the base on the workbench of the press, place the workpiece to be press-fitted into the cavity of the lower die, and place the bushing into the shaft hole of the workpiece.

[0020] S2. Start the stepping motor to drive the screw to rotate. The screw drives the sliding sleeve to displace, and the sliding sleeve drives the piston plate to move, squeezing the lubricating oil in the oil storage cylinder so that it enters the cylinder through the oil outlet nozzle, the oil delivery pipe and the one-way valve.

[0021] S3. The output end of the press moves downward to press the pressing block to drive the top plate to move downward. The top plate drives the L-shaped block to move downward, the L-shaped block drives the pressure rod to move downward, and the pressure rod drives the plunger to squeeze the lubricating oil in the cylinder into the hose and then into the oil injection nozzle.

[0022] S4. The oil injection nozzle injects the lubricating oil into the oil injection rod. Immediately, the lubricating oil enters into a plurality of micro-hole channels. The die head squeezes the bushing so that it enters the shaft hole of the workpiece. At the same time, the lubricating oil in the micro-hole channels is extruded and smeared on the bushing and the shaft hole of the workpiece, so that lubrication and press-fitting are carried out synchronously.

[0023] Compared with the prior art, the present invention provides a bushing press-fitting die and a bushing press-fitting method, which have the following beneficial effects:

[0024] 1. By setting a lubricating oil storage component, an oil injection component and an upper die with micro-hole channels, the present invention realizes automatic oil injection during the press-fitting process. By starting the stepping motor to squeeze the lubricating oil in the oil storage cylinder into the cylinder, when the press presses down, it drives the pressure rod to squeeze the lubricating oil in the cylinder, injects it into the oil injection rod through the oil injection nozzle, and then smears the lubricating oil on the surface of the bushing and the shaft hole of the workpiece through the micro-hole channels, avoiding scratches caused by dry friction between the bushing and the die, protecting the surface finish of the bushing, improving its wear resistance and corrosion resistance, extending the service life, and at the same time avoiding indentation on the bushing caused by the die head.

[0025] 2. In the present invention, the lower die is connected to the slide rail through a slider, and the handle can be pulled to move it, facilitating the loading and unloading of workpieces; the upper die can be removed by screwing the bolts on the outer wall of the sleeve. The overall structure can replace the upper die and the lower die separately, and the appropriate die can be selected according to different workpieces, reducing the die cost; by rotating the upper knob, the pressure rod can be driven to rotate, so that the pressure rod can feed in the L-shaped block, thereby adjusting the height of the pressure rod. The height of the plunger in the cylinder is driven by the pressure rod, and then the lower knob is tightened to fix the pressure rod, so that the injection oil volume can be adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a three-dimensional schematic diagram of the structure of the present invention;

[0027] Figure 2 is a front schematic diagram of the structure of the present invention;

[0028] Figure 3 is a three-dimensional schematic diagram of the lubricating oil storage component and the oil injection component in the structure of the present invention;

[0029] Figure 4 is a three-dimensional schematic diagram of components such as the bottom plate, slide rail and lower die in the structure of the present invention;

[0030] Figure 5 is a side schematic diagram of components such as the bottom plate, slide rail and lower die in the structure of the present invention;

[0031] Figure 6 is a three-dimensional sectional schematic diagram of the lubricating oil storage component in the structure of the present invention;

[0032] Figure 7 is a three-dimensional schematic diagram of the oil injection component in the structure of the present invention;

[0033] Figure 8 is a sectional schematic diagram of the oil injection component in the structure of the present invention;

[0034] Figure 9 is a three-dimensional sectional schematic diagram of the upper die in the structure of the present invention.

[0035] Wherein: 1. Base; 2. Bottom plate; 3. Side plate; 4. L-shaped plate; 5. Lubricating oil storage component; 51. Oil storage cylinder; 52. Oil outlet nozzle; 53. End cover; 54. Stepper motor; 55. Screw; 56. Slide sleeve; 57. Piston plate; 58. Cover plate; 59. Limit pin; 510. Oil delivery pipe; 511. Check valve; 512. Limit rod; 6. Oil injection component; 61. Cylinder; 62. Plunger; 63. Pressure rod; 64. Cylinder cover; 65. Lower knob; 66. L-shaped block; 67. Upper knob; 68. Hose; 69. Oil injection nozzle; 7. Slide rail; 8. Slider; 9. Lower die; 10. Guide rod; 11. Top plate; 12. Sleeve; 13. Upper die; 131. Oil injection rod; 132. Die head; 133. Micro-hole channel; 14. Return spring; 15. Pressure block; 16. Handle. Detailed implementation mode

[0036] The following further describes in detail the implementation mode of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0037] In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more; the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, terms such as "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] Please refer to Figures 1-9 , a bushing press-fitting die, including a base 1, a bottom plate 2 is fixedly connected to the top surface of the base 1, side plates 3 and L-shaped plates 4 are bolted to the lower surface of the bottom plate 2, a lubricating oil storage assembly 5 is arranged between the side plates 3 and the L-shaped plates 4, an oil injection assembly 6 and a slide rail 7 are screwed to the upper surface of the bottom plate 2, a slider 8 is slidably connected to the outer surface of the slide rail 7, a lower die 9 is bolted to the top surface of the slider 8, a guide rod 10 is threaded to the upper surface of the bottom plate 2, a top plate 11 is slidably connected to the outer surface of the guide rod 10, a sleeve 12 is screwed to the lower surface of the top plate 11, an upper die 13 is inserted into the interior of the sleeve 12, and a return spring 14 is sleeved on the outer surface of the guide rod 10;

[0040] The oil injection assembly 6 includes a cylinder 61, a plunger 62 is closely attached to the inner wall of the cylinder 61, a pressure rod 63 is threaded inside the plunger 62, a cylinder cover 64 is threaded to the top end of the cylinder 61, a lower knob 65 and an L-shaped block 66 are threaded to the outer surface of the pressure rod 63, and an upper knob 67 is fixedly connected to the top end of the pressure rod 63. A hose 68 is threaded to the outer surface of the cylinder 61 near the bottom end, and an oil injection nozzle 69 is clamped to one end of the hose 68;

[0041] The upper die 13 includes an oil injection rod 131. One end of the oil injection rod 131 is integrally connected with a die head 132. Microporous channels 133 are formed on the outer peripheral surface and the bottom surface of the die head 132.

[0042] Furthermore, a pressing block 15 is fixedly connected to the upper surface of the top plate 11. The oil injection rod 131 is inserted into the sleeve 12, and a locking bolt is threadedly connected to the outer wall of the sleeve 12. The locking bolt abuts against the oil injection rod 131.

[0043] Fix the base 1 to the workbench of the press. Place the workpiece in the cavity of the lower die 9. The cavity of the lower die 9 is customized according to the shape of the workpiece. Then, place the bushing into the shaft hole of the workpiece. After starting the press, its output end moves downward and presses the pressing block 15. The pressing block 15 drives the top plate 11 to move downward. The top plate 11 drives the sleeve 12, and the sleeve 12 drives the upper die 13 to move downward. The die head 132 of the upper die 13 contacts the bushing and squeezes the bushing so that it enters the shaft hole of the workpiece to complete the press-fitting.

[0044] Furthermore, two slide rails 7 are bolted to the upper surface of the bottom plate 2. A cavity is formed on the upper surface of the lower die 9 for placing the workpiece to be press-fitted. And a handle 16 is screwed to the front end of the lower die 9.

[0045] After the press-fitting of the bushing is completed, the output end of the press rises. The return spring 14 pushes the top plate 11 to rise. The top plate 11 drives the sleeve 12 and the upper die 13 to rise and reset. At this time, pull the handle 16 to drive the lower die 9 to move. The lower die 9 drives the slider 8 to move on the slide rail 7. In this way, the lower die 9 moves out from below the top plate 11, which is convenient for taking out the workpiece from the cavity of the lower die 9. Then, place a new workpiece to be press-fitted into the cavity of the lower die 9 again. Since the lower die 9 can be separated from the slider 8, and the upper die 13 can be removed after unscrewing the bolt on the outer wall of the sleeve 12, the overall structure can separately remove the upper die 13 and the lower die 9. In this way, different upper and lower dies can be replaced according to different workpieces, so that there is no need to replace the entire mold, reducing the mold cost.

[0046] Furthermore, the lubricating oil storage assembly 5 includes an oil storage cylinder 51. One end of the oil storage cylinder 51 is threadedly connected with an oil outlet nozzle 52. And the other end of the oil storage cylinder 51 is threadedly connected with an end cover 53. A stepping motor 54 is installed on the end surface of the end cover 53. The output end of the stepping motor 54 is fixedly connected with a screw rod 55. A sliding sleeve 56 is threadedly connected to the outer surface of the screw rod 55. A piston plate 57 is sleeved on the outer surface of the sliding sleeve 56. And one end of the sliding sleeve 56 is fixedly connected with a cover plate 58. A limit pin 59 is fixedly connected to the end surface of the cover plate 58.

[0047] Further, the lubricating oil storage component 5 further includes an oil delivery pipe 510. One end of the oil delivery pipe 510 is threadedly connected to the oil outlet nozzle 52, and the other end of the oil delivery pipe 510 is threadedly connected with a one-way valve 511. One end of the one-way valve 511 is threadedly connected to the bottom end of the cylinder 61. The oil storage cylinder 51 is filled with lubricating oil, and a limiting rod 512 is slidably connected to the outer peripheral surface of the piston plate 57.

[0048] Further, two limiting pins 59 are fixedly connected to the end surface of the cover plate 58. The limiting pins 59 are inserted into the inside of the piston plate 57. The L-shaped plate 4 is threadedly connected to the end cover 53 by bolts. A jack is formed through the outer surface of the side plate 3, and the oil outlet nozzle 52 is inserted into the jack.

[0049] By starting the stepper motor 54 to drive the screw rod 55 to rotate, the screw rod 55 drives the sliding sleeve 56 to move. The sliding sleeve 56 drives the piston plate 57 to move. The piston plate 57 squeezes the lubricating oil in the oil storage cylinder 51 into the oil outlet nozzle 52. By providing the limiting rod 512, the piston plate 57 can be limited and guided. When the lubricating oil enters the oil outlet nozzle 52, it will enter the oil delivery pipe 510 and finally enter the cylinder 61 through the one-way valve 511, thus preparing for subsequent oil injection; when the lubricating oil in the oil storage cylinder 51 is exhausted, by loosening the bolts on the L-shaped plate 4, the oil storage cylinder 51 and other components can be disassembled. By rotating the oil outlet nozzle 52 to separate it from the oil storage cylinder 51, lubricating oil can be re-injected into the oil storage cylinder 51.

[0050] Further, an oil injection nozzle 69 is threadedly connected to the outer surface of the sleeve 12. The oil injection nozzle 69 is communicated with the oil injection rod 131. The cylinder 61 is connected to the upper surface of the bottom plate 2 by screws.

[0051] Further, the L-shaped block 66 is connected to the rear side of the top plate 11 by bolts. A threaded hole is formed through the lower surface of the top plate 11, and the threaded hole is threadedly connected to the pressure rod 63. The lower knob 65 is attached to the lower surface of the L-shaped block 66.

[0052] Further, a plurality of micro-hole channels 133 are formed through the outer peripheral surface and the bottom surface of the die head 132 around its axis direction. The micro-hole channels 133 are communicated with the internal channel of the oil injection rod 131. The diameter of the micro-hole channels 133 is one millimeter.

[0053] After the press is started, its output end descends to press the pressing block 15. The pressing block 15 drives the top plate 11 to descend. The top plate 11 drives the L-shaped block 66 to move downward. The L-shaped block 66 drives the pressing rod 63 to move downward. The pressing rod 63 drives the plunger 62 to move downward. The plunger 62 squeezes the lubricating oil in the cylinder 61 so that it enters the hose 68. Subsequently, the lubricating oil enters the oil injection rod 131 through the oil injection nozzle 69. Then the lubricating oil enters into each microporous channel 133 and finally precipitates from the microporous channel 133. Just at this time, the die head 132 presses the bushing, so that the lubricating oil is coated in the bushing and the shaft hole of the workpiece, avoiding the subsequent process of adding lubricating oil. At the same time, during the pressing process, the lubricating oil precipitating from the microporous channel 133 can also lubricate the die head 132, thus preventing the die head 132 from causing indentations on the bushing. At the same time, when the upper knob 67 is rotated, the pressing rod 63 can be driven to rotate. In this way, the pressing rod 63 can feed in the L-shaped block 66, thereby adjusting the height of the pressing rod 63. The pressing rod 63 drives the plunger 62 to adjust the height in the cylinder 61. Then the lower knob 65 is tightened to fix the pressing rod 63, so that the oil injection amount can be adjusted.

[0054] The present invention also provides a method for pressing a bushing, which is carried out according to the following steps:

[0055] S1. Install the base 1 on the workbench of the press, place the workpiece to be pressed into the cavity of the lower die 9, and place the bushing into the shaft hole of the workpiece;

[0056] S2. Start the stepping motor 54 to drive the screw 55 to rotate. The screw 55 drives the sliding sleeve 56 to displace. The sliding sleeve 56 drives the piston plate 57 to move and squeeze the lubricating oil in the oil storage cylinder 51 so that it enters the cylinder 61 through the oil outlet nozzle 52, the oil transmission pipe 510 and the one-way valve 511;

[0057] S3. Move the output end of the press downward to press the pressing block 15 to drive the top plate 11 to move downward. The top plate 11 drives the L-shaped block 66 to move downward. The L-shaped block 66 drives the pressing rod 63 to move downward. The pressing rod 63 drives the plunger 62 to squeeze the lubricating oil in the cylinder 61 into the hose 68, and then into the oil injection nozzle 69;

[0058] S4. The oil injection nozzle 69 injects the lubricating oil into the oil injection rod 131. Immediately, the lubricating oil enters into a plurality of microporous channels 133. The die head 132 presses the bushing to make it enter the shaft hole of the workpiece. At the same time, the lubricating oil extruded from the microporous channels 133 is smeared on the bushing and the shaft hole of the workpiece, so that lubrication and pressing are carried out synchronously.

[0059] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A shaft sleeve press-fitting die, comprising a base (1), characterized in that: The top surface of the base (1) is fixedly connected to a bottom plate (2), the lower surface of the bottom plate (2) is connected to a side plate (3) and an L-shaped plate (4) by bolts, a lubricating oil storage assembly (5) is arranged between the side plate (3) and the L-shaped plate (4), the upper surface of the bottom plate (2) is connected to an oil injection assembly (6) and a slide rail (7) by screws, the outer surface of the slide rail (7) is slidably connected to a slider (8), the top surface of the slider (8) is connected to a lower mold (9) by bolts, the upper surface of the bottom plate (2) is threadedly connected to a guide rod (10), the outer surface of the guide rod (10) is slidably connected to a top plate (11), the lower surface of the top plate (11) is connected to a sleeve (12) by screws, the interior of the sleeve (12) is inserted into an upper mold (13), and the outer surface of the guide rod (10) is sleeved with a reset spring (14); The oil injection assembly (6) comprises a column (61), a plunger (62) is tightly attached to the inner wall of the column (61), a pressure rod (63) is threadedly connected to the inside of the plunger (62), a column cover (64) is threadedly connected to the top of the column (61), a lower knob (65) and an L-shaped block (66) are threadedly connected to the outer surface of the pressure rod (63), and an upper knob (67) is fixedly connected to the top of the pressure rod (63), a hose (68) is threadedly connected to the outer surface of the column (61) near the bottom, and an oil injection nozzle (69) is clamped at one end of the hose (68); The upper die (13) comprises an oil injection rod (131), one end of which is integrally connected to a die head (132), and microporous channels (133) are provided on the outer peripheral surface and the bottom surface of the die head (132).

2. The shaft sleeve press-fitting die according to claim 1, characterized in that: A pressure block (15) is fixedly connected to the upper surface of the top plate (11), an oil injection rod (131) is inserted into the interior of the sleeve (12), and a locking bolt is threadedly connected to the outer wall of the sleeve (12), and the locking bolt abuts against the oil injection rod (131).

3. The shaft sleeve press-fitting die according to claim 1, characterized in that: The upper surface of the base plate (2) is connected to two slide rails (7) by bolts, the upper surface of the lower die (9) is provided with a cavity for placing a workpiece to be pressed, and the front end of the lower die (9) is connected to a handle (16) by screws.

4. The shaft sleeve press-fitting die according to claim 1, characterized in that: The lubricating oil storage assembly (5) comprises an oil storage barrel (51), one end of the oil storage barrel (51) is threadedly connected to an oil outlet nozzle (52), and the other end of the oil storage barrel (51) is threadedly connected to an end cover (53), a stepper motor (54) is installed on the end surface of the end cover (53), the output end of the stepper motor (54) is fixedly connected to a screw rod (55), the outer surface of the screw rod (55) is threadedly connected to a sleeve (56), the outer surface of the sleeve (56) is sleeved with a piston plate (57), and one end of the sleeve (56) is fixedly connected to a cover plate (58), and a limit pin (59) is fixedly connected to the end surface of the cover plate (58).

5. The shaft sleeve press-fitting die according to claim 4, characterized in that: The lubricating oil storage assembly (5) further comprises an oil delivery pipe (510), one end of which is threadedly connected to the oil outlet nozzle (52), and the other end of which is threadedly connected to a one-way valve (511), one end of which is threadedly connected to the bottom end of the column (61), the oil storage cylinder (51) is filled with lubricating oil, and a limit rod (512) is slidably connected to the outer peripheral surface of the piston plate (57).

6. The shaft sleeve press-fitting die according to claim 4, characterized in that: Two limit pins (59) are fixedly connected to the end surface of the cover plate (58), and the limit pins (59) are inserted into the interior of the piston plate (57). The L-shaped plate (4) is threadedly connected to the end cover (53) through bolts. A plug hole is penetrated through the outer surface of the side plate (3), and the oil outlet nozzle (52) is inserted into the plug hole.

7. The shaft sleeve press-fitting die according to claim 1, characterized in that: The outer surface of the sleeve (12) is threadedly connected with an oiling nozzle (69), the oiling nozzle (69) is connected to the oiling rod (131), and the column tube (61) is connected to the upper surface of the base plate (2) by screws.

8. The shaft sleeve press-fitting die according to claim 1, characterized in that: The L-shaped block (66) is connected to the rear side of the top plate (11) by bolts, and a screw hole is penetrated through the lower surface of the top plate (11), and the screw hole is threadedly connected to the pressure rod (63), and the lower knob (65) is attached to the lower surface of the L-shaped block (66).

9. The shaft sleeve press-fitting die according to claim 1, characterized in that: A plurality of microporous channels (133) are provided on the outer peripheral surface and the bottom surface of the die head (132) around its axial direction, and the microporous channels (133) are connected with the internal channels of the oil injection rod (131), and the diameter of the microporous channels (133) is one millimeter.

10. A method for pressing a shaft sleeve, using the shaft sleeve pressing die according to any one of claims 1 to 9, characterized in that: Proceed as follows: S1. Install the base (1) on the workbench of the press machine, place the workpiece to be pressed into the cavity of the lower die (9), and place the shaft sleeve into the shaft hole of the workpiece; S2, starting the stepper motor (54) to drive the screw (55) to rotate, the screw (55) drives the sliding sleeve (56) to move, the sliding sleeve (56) drives the piston plate (57) to move and squeeze the lubricating oil in the oil storage cylinder (51) so that the lubricating oil enters the column cylinder (61) through the oil outlet nozzle (52), the oil delivery pipe (510) and the one-way valve (511); S3, the output end of the press machine moves downward to press the pressing block (15) to drive the top plate (11) to move downward, the top plate (11) drives the L-shaped block (66) to move downward, the L-shaped block (66) drives the pressing rod (63) to move downward, the pressing rod (63) drives the plunger (62) to squeeze the lubricating oil in the column tube (61) into the hose (68), and then into the oil injection nozzle (69); S4, the oiling nozzle (69) injects the lubricating oil into the oiling rod (131), and then the lubricating oil enters into the multiple microporous channels (133), and the die head (132) squeezes the sleeve to make it enter the axial hole of the workpiece. At the same time, the lubricating oil in the microporous channel (133) is squeezed out and smeared on the sleeve and the axial hole of the workpiece, so that lubrication and press-fitting are carried out simultaneously.

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