Hollow shaft drilling, tilt rolling and integral forming equipment

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 device for boring, tilt-rolling and integrally forming hollow shafts. [Background technology]

[0002] With the rapid development of the transportation industry, railways are playing an increasingly prominent role in China's transportation system, and high-speed, heavy-duty transportation is the medium- 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 weight reduction, and not only can they meet the strength requirements of axles, but they can also significantly reduce the unsprung weight of trains, improving the stability and safety of train operation. Therefore, hollow axles are commonly used for train axles.

[0003] Currently, two methods are commonly used in the manufacture of hollow shafts for trains, both in China and abroad. One is to drill an inner hole after rolling a solid shaft blank. This method is simple but wastes material and requires a relatively large amount of subsequent cold working. The other is to directly roll the hollow blank into a hollow shaft using cross wedge rolling. This method has the advantages of good product performance and significant material and energy savings, and has potential for development. While cross wedge rolling is possible for forming hollow shafts for trains, it requires a die diameter of φ3000mm or more. Even if a multi-wedge cross wedge rolling process is used, which significantly reduces the dimensions of the die and equipment, the die diameter must be φ1600mm or more. Such large equipment and die inevitably require large investments, high costs, inconvenient production operations, and difficult implementation, so forming hollow shafts using this process has not been widely used. 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 highly versatile hollow shaft piercing, tilt rolling and integral forming device which has a compact structure, a small volume, stable and reliable rolling compared to cross wedge rolling forming, and is capable of one-time forming of hollow stepped shafts for trains. [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-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-rolling component and is used to place the rolled material, the electro-hydraulic push rod is used to push the rolled material into the piercing-rolling component, the stepped shaft rolling component is located at the outlet side of the piercing-rolling component, the lift bar is used to axially penetrate 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 drive 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 to the piercing rolls in a 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.

[0007] Furthermore, the perforating roll gap distance adjustment mechanism includes an adjustment base and two roll system holders arranged opposite each other and open on both the inside and 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 is slidably fitted 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 rotates the two-way screw so that the two sliders approach or move away from each other.

[0008] Furthermore, 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 arcuate surface, the pad is fixed to the upper end surface of the slider, the upper end surface of the pad is provided with an arcuate groove, the arcuate surface of the deflection block and the arcuate groove are fitted together, the swing lever is installed vertically and its upper end is fixed to the deflection block, a swing groove is installed in the pad, the lower end of the swing lever passes through the swing groove and enters the slider, two adjusting screws installed horizontally opposite each other are screwed into the slider, the adjusting screws are located on both sides of the swing lever, the axial direction of the adjusting screws and the axial direction of the rolled material are parallel, and the inner end of the adjusting screw abuts against the swing lever in the radial direction and is fitted into the swing lever via a spherical surface.

[0009] Furthermore, 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 the upper end of the first frame, the press screw is rotatably connected to the upper end of the first frame, the 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 the 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 hingedly connected to the lower end of the press nut, the press block abuts against the upper end surface of the roll system holder, the side support mechanism includes a lift block and a support screw, a bushing is fixedly provided within the first frame, the support screw is threadedly connected to the bushing, the lift block is rotatably connected to the inner end of the support screw, a backing plate is fixedly provided on the 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 hingedly connected to the square corner 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 square corner 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.

[0011] Furthermore, the stepped shaft rolling component includes a second frame, three 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 being connected to the rolls in a one-to-one correspondence via second expandable universal joints, each of the rolls being provided with a roll adjustment mechanism for adjusting the deflection angle and radial feed of the roll, the roll adjustment mechanism being fixed to the second frame, and the second frame being fixed on the base.

[0012] Further, the rolling roll adjusting mechanism includes a first servo electric cylinder, a connecting plate, a radial push rod, a deflection adjusting plate, and a support base, the connecting plate is fixed to the second frame, the first servo electric cylinder is fixed to the connecting plate, the radial push rod is fixed to a main shaft of the first servo electric cylinder, the deflection adjusting 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 downward through the support base, the rolling roll is rotatably connected to the lower end of the radial push rod, the deflection adjusting 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 to the second frame, the deflection push rod is screwed to the cover plate, and the inner end of the deflection push rod abuts on the deflection push block and is fitted with a spherical surface.

[0013] Furthermore, the second frame is provided with a rolling material axial direction traction mechanism, which includes 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 the 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 the middle of the Y-shaped holding frame.

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

[0015] The advantages of the present invention over the prior art are that the piercing / tilting / integral-forming device has a compact structure, small volume, and stable and reliable rolling compared to cross wedge rolling forming, and can realize one-time forming of hollow stepped shafts, and the piercing / rolling component is provided with a piercing roll gap distance adjustment mechanism, which can realize rolling of hollow stepped shafts of different diameters, making it 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, making it highly versatile. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a schematic diagram of the overall structure of the present invention; [Figure 2] FIG. 2 is a structural schematic diagram of the first frame of the present invention. [Figure 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. [Figure 5]2 is a structural schematic diagram of the punching roll angle deflection adjusting mechanism of the present invention; FIG. [Figure 6] FIG. 2 is a local cross-sectional view of a perforating roll angle deflection adjustment mechanism of the present invention. [Figure 7] 1 is a schematic diagram of the mating of a perforated roll and a bearing housing of the present invention; [Figure 8] 1 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 illustrating the principle of a rolling hollow shaft according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0017] The invention will be described in more detail below in conjunction with the drawings and examples.

[0018] As shown in the figure, the hollow shaft piercing, 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 electrohydraulic push rod 4. The support groove 3 is located on the inlet side of the piercing and rolling component and is used to place the rolled material 100. The electrohydraulic 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. The 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 a 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 square at the upper end of the lower frame 51, and the upper cross member 52 is provided at the upper end of the lower frame 51, and open grooves 54 are provided at the square corners of the upper cross member 52, and connecting bolts 53 are screwed into the open grooves 54 and locked and fixed via locking nuts 55 to fix the upper cross member 52 and the lower frame 51, and the first frame 5 is provided with a drilling roll spacing distance adjustment mechanism and an adjustment lock mechanism, and the drilling roll spacing distance adjustment mechanism includes an adjustment base 10 and two roll system holders 11 arranged opposite each other and open on both the inside and both ends, and a bearing housing 12 is fixedly provided within the roll system holder 11, and the drilling 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 the 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. The drilling 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. 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. The upper end surface of the pad 17 is provided with an arc-shaped groove 171. The arc-shaped surface of the deflection block 16 and the arc-shaped groove 171 are fitted together. The swing lever 18 is vertically installed and has an upper end fixed to the deflection block 16. A swing lever is provided in the pad 17. The lower end of the swing lever 18 passes through the swing groove 172 and enters the slider 13. Two adjusting screws 131 are threadedly mounted horizontally opposite each other in the slider 13. The adjusting screws 131 are located on both sides of the swing lever 18. The axial direction of the adjusting screws 131 and the axial direction of the material 100 to be rolled are parallel. The inner end of the adjusting screw 131 abuts against the swing lever 18 in the radial direction and is fitted to the swing lever 18 via a spherical surface. The adjusting lock mechanism includes a press mechanism and a side support mechanism. The press mechanism includes a press cover 19, a press screw 20, and a press nut. 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 threadedly attached to 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, and the stopper 23 extends radially into the limiting groove 24, the press block 22 is hingedly connected 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 bushing 27 is fixed to the lower frame 51, the support screw 26 is screw-connected to the bushing 27, the lift block 25 is rotatably connected to the inner end of the support screw 26, and a backing plate 111 is fixedly provided on the outer wall of the roll system holder 11, and the lift block 25 abuts against the backing plate 111. 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, and 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 shafts of the second motors 30 being connected to the rolling rolls 29 in one-to-one correspondence via second expandable universal joints 31, and each rolling roll 29 is provided with a rolling shaft for adjusting the deflection angle and radial feed of the rolling roll. A roll adjusting mechanism is provided, the rolling roll adjusting mechanism is fixed to the second frame 28, the second frame 28 is fixed on the base 1, the rolling roll adjusting mechanism includes a first servo electric cylinder 32, a connecting plate 33, a radial push rod 34, a deflection adjusting plate 35 and a support base 36, the connecting plate 33 is fixed to the second frame 28, the first servo electric cylinder 32 is fixed on the connecting plate 33, the radial push rod 34 is fixed to the main shaft of the first servo electric cylinder 32, the deflection adjusting plate 35 is fixed to the radial The support base 36 is fixed to the second frame 28, the lower end of the radial push rod 34 passes through 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 fixed to the second frame 28, the cover plate 38 is provided with the deflection push rod 39 The inner end of the deflection push rod 39 abuts against the deflection push block 37 and is fitted with it via a spherical surface. The lift bar 2 is used to penetrate axially 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. The lift bar 2 is driven by a lift bar drive mechanism, which includes a hydraulic cylinder (not shown). 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 rolled material axial direction traction mechanism can be provided on the second frame 28, and the rolled 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 on the support rods 43, relatively slidable support rods 43 are drilled into the other two holding arms of the Y-shaped holding frame 41 via linear bearings, and the support rods 43 are fixed to the second frame 28. The four-jaw chuck 42 is rotatably connected to the center of the Y-shaped holding frame 41, and the lift bar 2 passes through the center hole of the four-jaw chuck 42, which can serve to support the lift bar 2. The four-jaw chuck 42 can be a pneumatic chuck with an automatic clamping function, etc.

[0021] The method for adjusting the gap and deflection angle of the two perforating rolls 6 of the present invention is as follows: the two-way screw 14 in the perforating roll gap adjusting mechanism is rotated, and the two sliders 13 are moved closer to or farther away 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, and the swing lever 18 deflects the deflection block 16, which 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. The press block 22 is hingedly connected to the lower end of the press nut 21. Therefore, when the roll system holder 11 is deflected, the press block 22 is driven by the press nut 21 to tightly press against the upper end surface of the roll system holder 11, thereby pressing the entire perforating roll spacing distance adjustment mechanism, making the pressing reliable and improving the flexibility of the press mechanism. By rotating the support screw 26 in the side support mechanism, the lift block 25 is brought into contact with the backing plate 111 on the outer wall of the roll system holder 11 to support the roll system holder 11 and prevent the perforating roll 6 from moving left and right.

[0022] The mill roll adjusting mechanism of the present invention uses a conventional structure, and its method for adjusting the deflection angle and radial feed of the mill roll 29 is as follows: The first servo electric cylinder 32 drives the radial push rod 34 to move radially toward the mill roll 29, and the radial push rod 34 penetrates the support base 36 to move the mill roll 29 and thereby realize the radial feed. When the deflection angle of the mill roll 29 needs to be adjusted, the deflection push rods 39 on both sides of the radial push rod 34 are rotated, and the deflection push rod 39 pushes the deflection push block 37 to deflect the deflection adjusting plate 35. The deflection adjusting plate 35 is fixed to the radial push rod 34, so that the radial push rod 34 is deflected synchronously, thereby deflecting the mill 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 begins by pushing the electric hydraulic push rod 4; (2) Perforation stage: The perforation process of the two rolls consists 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-like intermediate position consisting of the two perforation rolls 6. It is driven by the lift bar driving mechanism to move to the appropriate position. Then, by fixing the lock frame 44 and the base 1 or other parts in the rolling device, the lift bar 2 is locked, and the hole consisting of the two perforation rolls 6 is 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. After the rolled material 100 is inserted into the piercing roll 6, it is pressed by the piercing roll 6. Porosity occurs at the center of the rolled material 100 due to the Mannesmann effect, and the lift bar 2 penetrates the center of the rolled material 100 to form a hole. Through this process, the rolled material 100 is plastically deformed, and a thick-walled hollow rolled material with a diameter slightly smaller than the initial diameter of the rolled material 100 is formed. (3) Stepped shaft forming stage: With the progress of the drilling 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, which are uniformly distributed around the rolling axis 120°, are driven by the first servo electric cylinder 32 to feed along the radial direction of the hollow rolled material to form a hollow stepped shaft. During the rolling process, the rolling rolls 29 are deflected by ±3~10° relative 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. A hollow shaft piercing, tilt rolling and integral forming device comprising: a base, a lift bar, a piercing-rolling component fixed on the base, a stepped shaft rolling component, a support groove, and an electro-hydraulic push rod, wherein the support groove is located on the inlet side of the piercing-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 piercing-rolling component; the stepped shaft rolling component is located on the outlet side of the piercing-rolling component; the lift bar is used for axially penetrating the material to be rolled to form a center hole; the lift bar and the electro-hydraulic push rod are disposed opposite to each other; and the lift bar is driven by a lift bar drive mechanism; 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, and 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 a piercing roll spacing distance adjustment mechanism and an adjustment lock mechanism are provided on the first frame; the piercing roll gap distance adjusting mechanism includes an adjusting base and two roll system holders arranged opposite to each other and open on both the inside and 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 adjusting mechanism is provided between the slider and the roll system holder, the adjusting base is fixed within the first frame, a dovetail chute is provided on an upper surface of the adjusting base, a lower end of the slider is slidably fitted into the chute, a two-way screw is rotatably connected to the adjusting base, a threaded nut is fixedly provided within the slider, and the threaded nut is screwed to the two-way screw, and the two-way screw is rotated so that the two sliders approach or move away from each other.

2. 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, and 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, and an arc-shaped groove is provided on the upper end surface of the pad. 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, and a swing groove is provided in the pad.

2. The hollow shaft drilling, tilt rolling and integral forming device according to claim 1, wherein a lower end of the swing lever passes through the swing groove and enters the slider, and two adjusting screws are threadedly mounted in the slider so as to face each other horizontally, the adjusting screws are located on both sides of the swing lever, the axial direction of the adjusting screws and the axial direction of the material to be rolled are parallel, and the inner end of the adjusting screw abuts against the swing lever in the radial direction and is fitted into the swing lever via a spherical surface.

3. The adjustment lock mechanism includes a press mechanism and a side support mechanism, and the press mechanism includes a press cover, a press screw, a press nut, and a press block. The press cover is fixed to the upper end of the first frame, the press screw is rotatably connected to the upper end of the first frame, the 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 the upper end of the first frame, a vertical limiting groove is formed in the press nut, and the stopper extends into the limiting groove and is fixed to the front.

2. The piercing, tilt-rolling and integral-forming apparatus for a hollow shaft according to claim 1, wherein the press block is hingedly connected 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 bushing is fixedly provided within the first frame, the support screw is threadably connected to the bushing, 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.

4. 4. The hollow shaft piercing, tilt rolling and integral forming apparatus according to claim 3, wherein the first frame includes a lower frame and an upper cross member, the lower frame is fixed on the base, connecting bolts are hingedly connected to square corners of the upper end of the lower frame, the upper cross member is provided at the upper end of the lower frame, open grooves are provided at square corners of the upper cross member, the connecting bolts are screwed into the open grooves and locked and fixed via locking nuts, and the press mechanism is fixed to the upper cross member.

5. A hollow shaft drilling, tilt rolling and integral forming device comprising a base, a lift bar, a drilling and rolling component fixed on the base, a stepped shaft rolling component, a support groove and an electro-hydraulic push rod, the support groove being located on the inlet side of the drilling and rolling component and used for placing the material to be rolled, the electro-hydraulic push rod being used for pushing the material to be rolled into the drilling and rolling component, the stepped shaft rolling component being located on the outlet side of the drilling and rolling component, the lift bar being used for axially penetrating the material to be rolled to form a center hole, the lift bar and the electro-hydraulic push rod being arranged opposite each other, the lift bar being driven by a lift bar drive mechanism, The stepped shaft rolling component includes a second frame, three 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 being connected to the rolls in a one-to-one correspondence via second extendable universal joints, each of the rolls being provided with a roll adjustment mechanism for adjusting the deflection angle and radial feed of the roll, the roll adjustment mechanism being fixed to the second frame, and the second frame being fixed on the base; The rolling roll adjusting mechanism includes a first servo electric cylinder, a connection plate, a radial push rod, a deflection adjusting 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 adjusting 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. the rolls are rotatably connected to the lower ends of the radial push rods, the deflection adjusting plate is provided with two vertical chutes symmetrical along the radial push rods, a deflection push block is provided within the vertical chute, a cover plate is fixedly provided on the second frame, the deflection push rods are screwed onto the cover plate, and the inner ends of the deflection push rods abut against the deflection push blocks and are fitted together via spherical surfaces.

6. A hollow shaft drilling, tilt rolling and integral forming device comprising a base, a lift bar, a drilling and rolling component fixed on the base, a stepped shaft rolling component, a support groove and an electro-hydraulic push rod, wherein the support groove is located on the inlet side of the drilling and rolling component and is used for placing the 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 shaft rolling component is located on the outlet side of the drilling and rolling component, the lift bar is used for axially penetrating the material to be rolled to form a center hole, the lift bar and the electro-hydraulic push rod are arranged opposite each other, and the lift bar is driven by a lift bar drive mechanism, The stepped shaft rolling component includes a second frame, three 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 being connected to the rolls in a one-to-one correspondence via second extendable universal joints, each of the rolls being provided with a roll adjustment mechanism for adjusting the deflection angle and radial feed of the roll, the roll adjustment mechanism being fixed to the second frame, and the second frame being fixed on the base; a rolling material axial direction traction mechanism is provided on the second frame, the rolling material axial direction traction mechanism includes 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 central part of the Y-shaped holding frame.

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

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