Perforating and skew rolling integrated forming device for hollow shaft

Abstract

To provide a perforating and skew rolling integrated forming device for a hollow shaft, the hollow shaft having a compact structure, a small volume, and a stable and reliable rolling performance compared to cross wedge rolling / molding, and being capable of primary forming of train hollow stepped shafts, thus making it highly versatile.SOLUTION: The device includes a base 1, a lifting bar 2, a perforating and rolling component fixed on the base, a stepped shaft rolling component, a support groove 3, and an electrohydraulic push rod 4, wherein the support groove is located on an inlet side of the perforating and rolling component and is used for placing a material 100 to be rolled, the electrohydraulic push rod is used for pushing the material to be rolled into the perforating rolling component, the stepped shaft rolling component is located at an outlet side of the perforating and rolling component, the lifting bar is used to axially penetrate into the material to be rolled in an axial direction to form a central hole, the lifting bar and the electrohydraulic push rod are provided opposite to each other, and the lifting bar is driven by a lifting bar drive mechanism.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a rolling device for shaft members, and more particularly to a boring, tilt rolling and integral forming device for hollow shafts. [Background technology]

[0002] With the rapid development of the transportation industry, railways play an increasingly prominent role in China's transportation system. High-speed heavy loads are the mid- to long-term goal of high-speed transportation. The key to solving this problem is to reduce the weight of components. Hollow axles are an important part of the weight reduction, and hollow axles not only meet the strength requirements of axles, but also greatly reduce the unsprung weight of trains, improving the stability and safety of train operation. Therefore, train axles generally adopt hollow axles.

[0003] At present, the manufacturing process of train hollow shafts is generally adopted in China and abroad in two ways. One is to drill an inner hole after rolling a solid shaft blank, which is a simple process but wastes material and requires a relatively large amount of subsequent cold processing. The other is to directly roll the hollow blank into a hollow shaft by cross wedge rolling, which has the advantages of good product performance, significant material saving and energy saving, and has potential for development. Although it is possible to form train hollow shafts by the cross wedge rolling process, the diameter of the die needs to reach φ3000mm or more. Even if the cross wedge rolling process with multiple wedges is adopted, which significantly reduces the dimensions of the die and equipment, the diameter of the die needs to reach φ1600mm or more. Such large equipment and die inevitably require large investment, high cost, inconvenient production operation, and difficult to implement, so the forming of train hollow shafts by this process has not been popularized for a long time. Summary of the Invention [Problem to be solved by the invention]

[0004] The technical problem to be solved by the present invention is to provide a versatile hollow shaft drilling, tilt rolling and integral forming device which has a compact structure, a small volume, stable and reliable rolling, and is capable of primary forming of a hollow stepped shaft for trains, compared with cross wedge rolling forming. [Means for solving the problem]

[0005] The technical solution adopted by the present invention to solve the above technical problems is as follows: A hollow shaft piercing, tilt rolling and integral forming device includes a base, a lift bar, a piercing and rolling component fixed on the base, a stepped shaft rolling component, a support groove and an electro-hydraulic push rod, the support groove is located at the inlet side of the piercing and rolling component and is used for placing a rolled material, the electro-hydraulic push rod is used for pushing the rolled material into the piercing and rolling component, the stepped shaft rolling component is located at the outlet side of the piercing and rolling component, the lift bar is used for axially penetrating the rolled material to form a center hole, the lift bar and the electro-hydraulic push rod are arranged opposite to each other, and the lift bar is driven by a lift bar driving mechanism.

[0006] Further, the piercing rolling component includes a first frame and two piercing rolls arranged horizontally, a motor base is fixedly mounted on the base, two first motors are fixedly mounted on the motor base, the drive shafts of the first motors are connected in one-to-one correspondence to the piercing rolls via a first expandable universal joint to rotate the piercing rolls, the first frame is fixed on the base, and the first frame is provided with a piercing roll spacing distance adjustment mechanism and an adjustment lock mechanism.

[0007] Furthermore, the perforating roll gap distance adjustment mechanism includes an adjustment base and two roll system holders arranged opposite each other and both of which are open on the inside and at both ends, a bearing housing is fixedly provided within the roll system holder, the perforating rolls are rotatably connected to the bearing housings in a one-to-one correspondence, a slider is provided below the roll system holder, and a perforating roll angle deflection adjustment mechanism is provided between the slider and the roll system holder, the adjustment base is fixed within the first frame, a dovetail chute is provided on the upper surface of the adjustment base, the lower end of the slider slides into the chute, a two-way screw is rotatably connected to the adjustment base, and a screw nut is fixedly provided within the slider, the screw nut is screwed into the two-way screw, and the two sliders are rotated so as to move closer to or away from each other.

[0008] Further, the piercing roll angle deflection adjustment mechanism includes a deflection block, a pad, and a swing lever, the deflection block is fixed to the lower end surface of the roll system holder, the lower end surface of the deflection block is an arc-shaped surface, the pad is fixed to the upper end surface of the slider, the upper end surface of the pad is provided with an arc-shaped groove, the arc-shaped surface of the deflection block and the arc-shaped groove are fitted together, the swing lever is vertically installed and its upper end is fixed to the deflection block, a swing groove is provided in the pad, the lower end of the swing lever penetrates the swing groove and enters the slider, and two adjustment screws are screwed into the slider, the adjustment screws are located on both sides of the swing lever, the axial direction of the adjustment screw and the axial direction of the rolled material are parallel, and the inner end of the adjustment screw abuts against the swing lever in the radial direction and fits into the swing lever via a spherical surface.

[0009] Further, the adjustment lock mechanism includes a press mechanism and a side support mechanism, the press mechanism includes a press cover, a press screw, a press nut, and a press block, the press cover is fixed to an upper end of the first frame, the press screw is rotatably connected to an upper end of the first frame, an upper end of the press screw protrudes from the press cover, the press nut is screwed onto the press screw, a stopper is fixed to an upper end of the first frame, and the press nut is provided with a vertical limiting groove; the stopper extends into the limiting groove, the press block is hinged to a lower end of the press nut, the press block abuts against an upper end surface of the roll system holder, the side support mechanism includes a lift block and a support screw, a bush is fixedly provided within the first frame, the support screw is screw-connected to the bush, the lift block is rotatably connected to an inner end of the support screw, a backing plate is fixedly provided on an outer wall of the roll system holder, and the lift block abuts against the backing plate.

[0010] Furthermore, the first frame includes a lower frame and an upper cross member, the lower frame is fixed on the base, a connecting bolt is hinged to the four corners of the upper end of the lower frame, the upper cross member is provided at the upper end of the lower frame, an open groove is provided at the four corners of the upper cross member, the connecting bolt is screwed into the open groove and locked in place via a locking nut, and the press mechanism is fixed to the upper cross member.

[0011] Further, the stepped shaft rolling component includes a second frame, three rolling rolls uniformly distributed along the circumferential direction of the rolled material, and three second motors fixed to the second frame, the drive shafts of the second motors are connected to the rolling rolls in one-to-one correspondence via second expandable universal joints, each of the rolling rolls is provided with a rolling roll adjustment mechanism for adjusting the deflection angle and radial feed of the rolling roll, the rolling roll adjustment mechanism is fixed to the second frame, and the second frame is fixed on the base.

[0012] Further, the rolling roll adjusting mechanism includes a first servo electric cylinder, a connection plate, a radial push rod, a deflection adjustment plate, and a support base, the connection plate is fixed to the second frame, the first servo electric cylinder is fixed to the connection plate, the radial push rod is fixed to the main shaft of the first servo electric cylinder, the deflection adjustment plate is fixed to the radial push rod, the support base is fixed to the second frame, the lower end of the radial push rod passes through the support base downward, the rolling roll is pivotally connected to the lower end of the radial push rod, the deflection adjustment plate is provided with two vertical chutes symmetrical along the radial push rod, a deflection push block is provided in the vertical chute, a cover plate is fixedly provided on the second frame, the deflection push rod is screwed to the cover plate, and the inner end of the deflection push rod abuts against the deflection push block and fits through a spherical surface.

[0013] Further, the second frame is provided with a rolling material axial direction traction mechanism, the rolling material axial direction traction mechanism including a second servo electric cylinder, a Y-shaped holding frame and a four-jaw chuck, the second servo electric cylinder is fixed to the second frame, one holding arm in the Y-shaped holding frame is fixed to a main shaft of the second servo electric cylinder, relatively slidable support rods are drilled in the other two holding arms of the Y-shaped holding frame, the support rods are fixed to the second frame, and the four-jaw chuck is rotatably connected to a middle part of the Y-shaped holding frame.

[0014] Furthermore, the lift bar drive mechanism includes a hydraulic cylinder, and a lock frame is fixedly provided at an end of the lift bar, and the lock frame is fixed to a piston rod of the hydraulic cylinder. Effect of the Invention

[0015] Compared with the prior art, the advantages of the present invention are that the piercing / tilt rolling / integral forming device has a compact structure, a small volume, and stable and reliable rolling compared with cross wedge rolling forming, and can realize the primary forming of hollow stepped shafts; the piercing / rolling component is provided with a piercing roll spacing distance adjustment mechanism, which can realize rolling for hollow stepped shafts of different diameters, and is highly versatile; and each mechanism in the piercing / rolling component adopts a modular design, and the first frame adopts an assembled structure, which makes it easy to attach and detach each mechanism to the first frame, and is highly versatile. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1 is a schematic diagram of the overall structure of the present invention. [Diagram 2] FIG. 2 is a structural schematic diagram of a first frame of the present invention. [Diagram 3] FIG. 2 is a structural schematic diagram of a press mechanism of the present invention. [Figure 4] FIG. 2 is a structural schematic diagram of a side support mechanism of the present invention. [Diagram 5]FIG. 2 is a structural schematic diagram of the punch roll angle deflection adjustment mechanism of the present invention. [Figure 6] FIG. 2 is a local cross-sectional view of the punch roll angle deflection adjustment mechanism of the present invention. [Figure 7] FIG. 2 is a schematic diagram of the mating of the perforated roll and bearing housing of the present invention. [Figure 8] FIG. 2 is a schematic diagram of the connection between the adjustment base and the bidirectional screw of the present invention. [Figure 9] FIG. 2 is a structural schematic diagram of a rolling material axial traction mechanism of the present invention. [Figure 10] FIG. 2 is a structural schematic diagram of the rolling roll adjusting mechanism of the present invention. [Figure 11] 1 is a schematic diagram showing the principle of a rolling hollow shaft according to the present invention; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] The invention will now be described in more detail with reference to the drawings and examples.

[0018] As shown in the figure, the hollow shaft drilling, tilt rolling and integral forming device includes a base 1, a lift bar 2, a piercing and rolling component fixed on the base 1, a stepped shaft rolling component, a support groove 3 and an electric hydraulic push rod 4. The support groove 3 is located at the inlet side of the piercing and rolling component and is used to place the rolled material 100. The electric hydraulic push rod 4 is used to push the rolled material 100 into the piercing and rolling component. The piercing and rolling component includes a first frame 5 and two piercing rolls 6 arranged horizontally. On the base 1, A motor base 7 is fixedly mounted, and two first motors 8 are fixedly mounted on the motor base 7. A first extendable universal joint 9 is fixedly connected to the drive shaft of the first motor 8. The other end of the first extendable universal joint 9 is fixedly connected to the perforation roll 6 in one-to-one correspondence to drive the perforation roll 6 to rotate. The first frame 5 includes a lower frame 51 and an upper cross member 52. The lower frame 51 is fixed on the base 1. A connecting bolt 53 is hinged to the upper square of the lower frame 51. The upper cross member 52 is fixed to the upper square of the lower frame 51. is provided at the upper end of the lower frame 51, an open groove 54 is provided at each corner of the upper cross member 52, and a connecting bolt 53 is screwed into the open groove 54 and locked and fixed via a locking nut 55 to fix the upper cross member 52 and the lower frame 51. The first frame 5 is provided with a perforation roll interval adjustment mechanism and an adjustment lock mechanism. The perforation roll interval adjustment mechanism includes an adjustment base 10 and two roll system holders 11 that are arranged opposite to each other and have openings on the inside and both ends. A bearing housing 12 is fixedly provided within the roll system holder 11, and a perforation roll interval adjustment mechanism 12 is provided between the first frame 5 and the lower frame 51. The perforation rolls 6 are rotatably connected to the bearing housings 12 in one-to-one correspondence, a slider 13 is provided below the roll system holder 11, and a perforation roll angle deflection adjustment mechanism is provided between the slider 13 and the roll system holder 11, an adjustment base 10 is fixed in a lower frame 51, a dovetail chute 101 is provided on the upper surface of the adjustment base 10, the lower end of the slider 13 slides into the chute 101, a two-way screw 14 is rotatably connected to the adjustment base 10, a screw nut 15 is fixedly provided in the slider 13, and the screw nut 15 is screwed into the two-way screw 14,The two-way screw 14 is rotated so that the two sliders 13 approach or move away from each other, and the punch roll angle deflection adjustment mechanism includes a deflection block 16, a pad 17, and a swing lever 18. The deflection block 16 is fixed to the lower end surface of the roll system holder 11, and the lower end surface of the deflection block 16 is an arc-shaped surface. The pad 17 is fixed to the upper end surface of the slider 13, and an arc-shaped groove 171 is provided on the upper end surface of the pad 17, and the arc-shaped surface of the deflection block 16 and the arc-shaped groove 171 are engaged with each other. The swing lever 18 is vertically installed and has an upper end fixed to the deflection block 16, and a swing lever is provided in the pad 17. A moving groove 172 is provided, and the lower end of the rocking lever 18 passes through the rocking groove 172 and enters the slider 13. Two adjusting screws 131 are horizontally opposed to each other and are screwed into the slider 13. The adjusting screws 131 are located on both sides of the rocking lever 18. The axial direction of the adjusting screws 131 and the axial direction of the rolled material 100 are parallel to each other. The inner end of the adjusting screw 131 abuts against the rocking lever 18 in the radial direction and is fitted into the rocking lever 18 via a spherical surface. The adjustment lock mechanism includes a press mechanism and a side support mechanism. The press mechanism includes a press cover 19, a press screw 20, a press nut, and a press cover 21. The press cover 19 is fixed to an upper cross member 52, the press screw 20 is pivotally connected to the upper cross member 52, the upper end of the press screw 20 protrudes from the press cover 19, the press nut 21 is screwed onto the press screw 20, a stopper 23 is fixed to the lower end surface of the upper cross member 52, a vertical limiting groove 24 is provided in the press nut 21, the stopper 23 extends radially into the limiting groove 24, the press block 22 is hinged to the lower end of the press nut 21, and the press block 22 is connected to a roll system holder. The side support mechanism includes a lift block 25 and a support screw 26, a bush 27 is fixed to the lower frame 51, the support screw 26 is screwed to the bush 27, the lift block 25 is rotatably connected to the inner end of the support screw 26, and a backing plate 111 is fixed to the outer wall of the roll system holder 11, the lift block 25 abuts against the backing plate 111, and by providing the backing plate 111, damage due to direct contact between the side support mechanism and the roll system holder 11 can be avoided, and the replacement cost of the roll system holder 11 can be reduced.

[0019] The stepped shaft rolling component is located at the exit side of the piercing rolling component. The stepped shaft rolling component includes a second frame 28, three rolling rolls 29 uniformly distributed along the circumferential direction of the rolled material 100, and three second motors 30 fixed to the second frame 28. The drive shaft of the second motor 30 is connected to the rolling rolls 29 in one-to-one correspondence through a second expandable universal joint 31. Each rolling roll 29 is provided with a rolling motor for adjusting the deflection angle and radial feed of the rolling roll. A roll adjustment mechanism is provided, the rolling roll adjustment mechanism is fixed to the second frame 28, the second frame 28 is fixed on the base 1, the rolling roll adjustment mechanism includes a first servo electric cylinder 32, a connection plate 33, a radial push rod 34, a deflection adjustment plate 35 and a support base 36, the connection plate 33 is fixed to the second frame 28, the first servo electric cylinder 32 is fixed on the connection plate 33, the radial push rod 34 is fixed to the main shaft of the first servo electric cylinder 32, the deflection adjustment plate 35 is fixed to the radial The radial push rod 34 is fixed to the support base 36, the support base 36 is fixed to the second frame 28, the lower end of the radial push rod 34 penetrates the support base 36 downward, the rolling roll 29 is rotatably connected to the lower end of the radial push rod 34, the deflection adjustment plate 35 is provided with two vertical chutes 351 symmetrical along the radial push rod 34, the deflection push block 37 is provided in the vertical chutes 351, the cover plate 38 is fixedly provided to the second frame 28, the deflection push rod 39 is provided in the cover plate 38, The lift bar 2 is used to axially penetrate into the rolled material 100 to form a central hole, the lift bar 2 and the electric hydraulic push rod 4 are arranged opposite each other, and the lift bar 2 is driven by a lift bar drive mechanism which includes a hydraulic cylinder (not shown), and a lock frame 44 is fixed to the end of the lift bar 2, and the lock frame 44 is fixed to the piston rod of the hydraulic cylinder.

[0020] In the above embodiment, in order to reduce the radial movement of the rolled material 100 during rolling and to improve the rolling accuracy, a rolling material axial direction traction mechanism can be provided on the second frame 28. The rolling material axial direction traction mechanism includes a second servo electric cylinder 40, a Y-shaped holding frame 41, and a four-jaw chuck 42. The second servo electric cylinder 40 is fixed to the second frame 28, and one holding arm of the Y-shaped holding frame 41 is fixed to the main shaft of the second servo electric cylinder 40. In order to allow the Y-shaped holding frame 41 to smoothly slide the support rod 43, a relatively slidable support rod 43 is drilled into the other two holding arms of the Y-shaped holding frame 41 via a linear bearing, the support rod 43 is fixed to the second frame 28, the four-jaw chuck 42 is rotatably connected to the center of the Y-shaped holding frame 41, the lift bar 2 passes through the center hole of the four-jaw chuck 42, and the four-jaw chuck 42 can play a role in supporting the lift bar 2. The four-jaw chuck 42 can be a pneumatic chuck with an automatic clamping function or the like.

[0021] The method of adjusting the gap and deflection angle of the two perforating rolls 6 of the present invention is as follows: the bidirectional screw 14 in the perforating roll gap adjustment mechanism is rotated, and the two sliders 13 are moved closer to or farther from each other by the screw nut 15, and the sliders 13 move the roll system holder 11 synchronously, thereby adjusting the gap between the two perforating rolls 6; when it is necessary to adjust the deflection angle of the perforating rolls 6, the two adjusting screws 131 on both sides of the swing lever 18 are rotated, and the adjusting screws 131 push the swing lever 18 to deflect, the swing lever 18 deflects the deflection block 16, and the deflection block 16 deflects the roll system holder 11 synchronously, thereby adjusting the deflection angle of the perforating rolls 6, and the adjustment is stable and reliable, and the gap and deflection angle of the perforating rolls 6 are adjusted. After the deflection angle is properly adjusted, the press screw 20 in the press mechanism is rotated to move the press nut 21 downward, and the press block 22 is hinged to the lower end of the press nut 21, so that when the roll system holder 11 is deflected, the press block 22 is driven by the press nut 21 to tightly adhere to the upper end surface of the roll system holder 11, and can press the entire punching roll gap distance adjustment mechanism, making the pressing reliable and improving the flexibility of the press mechanism; and by rotating the support screw 26 in the side support mechanism, the lift block 25 is abutted against the backing plate 111 on the outer wall of the roll system holder 11 to support the roll system holder 11 and prevent the punching roll 6 from moving left and right.

[0022] The roll adjustment mechanism of the present invention uses a conventional structure, and its method of adjusting the deflection angle and radial feed of the roll 29 is as follows: the first servo electric cylinder 32 drives the radial push rod 34 to move radially to the roll 29, the radial push rod 34 penetrates the support base 36 to move the roll 29 to realize the radial feed, when it is necessary to adjust the deflection angle of the roll 29, it rotates the deflection push rods 39 on both sides of the radial push rod 34, the deflection push rods 39 push the deflection push block 37 to deflect the deflection adjustment plate 35, and the deflection adjustment plate 35 is fixed to the radial push rod 34, so that the radial push rod 34 is deflected synchronously, thereby deflecting the roll 29.

[0023] The rolling process for the hollow shaft in the present invention is as follows.

[0024] (1) Feeding stage: The rolled material 100 is placed on the support groove 3, and the drilling stage is started by pushing the electric hydraulic push rod 4; (2) Perforation stage: The perforation process of the two rolls is composed of a lift bar 2 and two perforation rolls 6, the perforation rolls 6 and the rolling axis are deflected by ±3~10°, the lift bar 2 overlaps with the rolling axis, the top of the lift bar 2 is placed in the hole-shaped intermediate position composed of the two perforation rolls 6, and the lift bar 2 is driven by the lift bar driving mechanism to move to the appropriate position, and then the lift bar 2 is locked by fixing the lock frame 44 and the base 1 or other parts in the rolling device, and the hole of the two perforation rolls 6 is formed. The diameter is slightly smaller than the diameter of the rolled material 100. During the piercing process, the piercing roll 6 only rotates around its own axis. The rolled material 100 is inserted into the piercing roll 6 and then pressed by the piercing roll 6. The central position of the rolled material 100 will have porosity due to the Mannesmann effect, and the lift bar 2 will penetrate the center of the rolled material 100 to form a hole. Through this process, the rolled material 100 will be plastically deformed, forming a thick-walled hollow rolled material whose diameter is slightly smaller than the initial diameter of the rolled material 100. (3), stepped shaft forming stage: With the progress of the piercing stage, the end of the hollow rolled material is clamped by the four-jaw chuck 42, and the second servo electric cylinder 40 moves the four-jaw chuck 42 in the axial direction to control the axial feed speed of the hollow rolled material; at the same time, the three rolling rolls 29 uniformly distributed around the rolling axis 120° are fed along the radial direction of the hollow rolled material under the drive of the first servo electric cylinder 32 to form a hollow stepped shaft; during the rolling process, the rolling rolls 29 are deflected by ±3~10° with respect to the rolling axis, and the rolling rolls 29 rotate around their own axis; (4) Punching step: after the rolling is completed, first loosen the locking frame 44, take out the lifting bar 2, and then loosen the four-jaw chuck 42 to complete the entire process of boring, tilt rolling and integral forming of the hollow shaft.

[0025] The scope of protection of the present invention includes, but is not limited to, the above embodiments, and the scope of protection is based on the claims. All replacements, modifications, and improvements made to this technology that are easily thought of by those skilled in the art fall within the scope of protection of the present invention.

Claims

1. 1. A drilling, tilt rolling and integral forming apparatus for a hollow shaft, comprising: a base, a lift bar, a drilling and rolling component fixed on the base, a stepped axial rolling component, a support groove and an electro-hydraulic push rod, wherein the support groove is located on an inlet side of the drilling and rolling component and is used for placing a material to be rolled, the electro-hydraulic push rod is used for pushing the material to be rolled into the drilling and rolling component, the stepped axial rolling component is located on an outlet side of the drilling and rolling component, the lift bar is used for penetrating into the material to be rolled in the axial direction to form a central hole, the lift bar and the electro-hydraulic push rod are disposed opposite each other, and the lift bar is driven by a lift bar drive mechanism.

2. 2. The piercing, tilt rolling and integral forming apparatus for a hollow shaft according to claim 1, characterized in that the piercing and rolling component includes a first frame and two piercing rolls arranged horizontally, a motor base is fixedly mounted on the base, two first motors are fixedly mounted on the motor base, the drive shafts of the first motors are connected to the piercing rolls in one-to-one correspondence via first expandable universal joints to rotate the piercing rolls, the first frame is fixed on the base, and the first frame is provided with a piercing roll spacing distance adjustment mechanism and an adjustment lock mechanism.

3. 3. The piercing, tilt rolling and integral forming device for a hollow shaft according to claim 2, wherein the piercing roll gap distance adjustment mechanism includes an adjustment base and two roll system holders arranged opposite to each other and both of which are open on the inside and at both ends, a bearing housing is fixedly provided within the roll system holder, the piercing rolls are rotatably connected to the bearing housings in a one-to-one correspondence, a slider is provided below the roll system holder, and a piercing roll angle deflection adjustment mechanism is provided between the slider and the roll system holder, the adjustment base is fixed within the first frame, a dovetail chute is provided on an upper surface of the adjustment base, a lower end of the slider slides into the chute, a two-way screw is rotatably connected to the adjustment base, a screw nut is fixedly provided within the slider, and the screw nut is screwed into the two-way screw, and the two sliders are rotated so that they approach or move away from each other.

4. The punch roll angle deflection adjustment mechanism includes a deflection block, a pad, and a swing lever. The deflection block is fixed to the lower end surface of the roll system holder, the lower end surface of the deflection block is an arc-shaped surface, the pad is fixed to the upper end surface of the slider, the upper end surface of the pad is provided with an arc-shaped groove, the arc-shaped surface of the deflection block and the arc-shaped groove are engaged with each other, the swing lever is vertically installed and has an upper end fixed to the deflection block, and a swing groove is provided in the pad.

4. The drilling, tilt rolling and integral forming device for a hollow shaft according to claim 3, characterized in that: a lower end of the rocking lever passes through the rocking groove and enters the slider, and two adjustment screws are screwed into the slider so as to face each other horizontally, the adjustment screws are located on both sides of the rocking lever, the axial direction of the adjustment screws is parallel to the axial direction of the material to be rolled, and the inner end of the adjustment screw abuts against the rocking lever in the radial direction and is fitted into the rocking lever via a spherical surface.

5. The adjustment lock mechanism includes a press mechanism and a side support mechanism, the press mechanism includes a press cover, a press screw, a press nut, and a press block, the press cover is fixed to an upper end of the first frame, the press screw is rotatably connected to an upper end of the first frame, an upper end of the press screw protrudes from the press cover, the press nut is screwed onto the press screw, a stopper is fixed to an upper end of the first frame, a vertical limiting groove is provided on the press nut, the stopper extends into the limiting groove, and a front 4. The hollow shaft piercing, tilt rolling and integral forming apparatus according to claim 3, wherein the press block is hinged to a lower end of the press nut, the press block abuts against an upper end surface of the roll system holder, the side support mechanism includes a lift block and a support screw, a bush is fixedly provided within the first frame, the support screw is screw-connected to the bush, the lift block is rotatably connected to an inner end of the support screw, a backing plate is fixedly provided on an outer wall of the roll system holder, and the lift block abuts against the backing plate.

6. The hollow shaft drilling, tilt rolling and integral forming apparatus according to claim 5, characterized in that the first frame includes a lower frame and an upper cross member, the lower frame is fixed on the base, a connecting bolt is hinged to the four corners of the upper end of the lower frame, the upper cross member is provided at the upper end of the lower frame, an open groove is provided at the four corners of the upper cross member, the connecting bolt is screwed into the open groove and locked and fixed via a locking nut, and the press mechanism is fixed to the upper cross member.

7. The hollow shaft drilling, tilt rolling and integral forming apparatus according to claim 1, characterized in that the stepped shaft rolling component includes a second frame, three rolling rolls uniformly distributed along the circumferential direction of the rolled material, and three second motors fixed to the second frame, the drive shafts of the second motors are connected to the rolling rolls in one-to-one correspondence via second expandable universal joints, and each of the rolling rolls is provided with a rolling roll adjustment mechanism for adjusting the deflection angle and radial feed of the rolling roll, the rolling roll adjustment mechanism is fixed to the second frame, and the second frame is fixed on the base.

8. The rolling roll adjusting mechanism includes a first servo electric cylinder, a connection plate, a radial push rod, a deflection adjustment plate, and a support base, the connection plate is fixed to the second frame, the first servo electric cylinder is fixed to the connection plate, the radial push rod is fixed to a main shaft of the first servo electric cylinder, the deflection adjustment plate is fixed to the radial push rod, the support base is fixed to the second frame, and the lower end of the radial push rod penetrates the support base downward and is supported by a support base.

8. The hollow shaft piercing, tilt rolling and integral forming device according to claim 7, characterized in that: the rolling roll is rotatably connected to the lower end of the radial push rod; the deflection adjustment plate is provided with two vertical chutes symmetrical along the radial push rod; a deflection push block is provided within the vertical chute; a cover plate is fixedly provided on the second frame; the deflection push rod is screwed to the cover plate; and the inner end of the deflection push rod abuts against the deflection push block and is fitted with it via a spherical surface.

9. 8. The hollow shaft drilling, tilt rolling and integral forming device according to claim 7, characterized in that the second frame is provided with a rolling material axial direction traction mechanism, the rolling material axial direction traction mechanism including a second servo electric cylinder, a Y-shaped holding frame and a four-jaw chuck, the second servo electric cylinder is fixed to the second frame, one holding arm of the Y-shaped holding frame is fixed to a main shaft of the second servo electric cylinder, relatively slidable support rods are drilled into the other two holding arms of the Y-shaped holding frame, the support rods are fixed to the second frame, and the four-jaw chuck is rotatably connected to a middle part of the Y-shaped holding frame.

10. 2. The hollow shaft drilling, tilt rolling and integral forming apparatus according to claim 1, wherein the lift bar drive mechanism includes a hydraulic cylinder, a lock frame is fixed to an end of the lift bar, and the lock frame is fixed to a piston rod of the hydraulic cylinder.

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