Vertical double-spindle rotary swaging machine

Abstract

A vertical double-spindle rotary swaging machine comprises a vertical lathe bed, a forging unit, a feeding mechanism and a core feeding and pulling mechanism. The forging unit is connected to the middle of the vertical lathe bed, and a box front cover is arranged above the forging unit and connected with the vertical lathe bed. A feeding mechanism is installed on the upper portion of the vertical lathe bed, and a core feeding and pulling mechanism is arranged in the feeding mechanism. A square rubber damping support is arranged between the middle part and the upper part of the vertical lathe bed to form a flexible damping layer; according to the forging die, large-diameter tube and bar materials can be machined, inner hole forming of the tube materials is guaranteed, and the problem that the tube and bar materials cannot be effectively forged due to the fact that the forging die is large in mass can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of incremental forming of pipe parts, in particular to a vertical double-spindle rotary forging machine. Background Art

[0002] Rotary forging technology is a precision forming technology for tubes and rods. The forging unit of a rotary forging machine generally has 2 to 8 forging dies evenly surrounding the circumference of the workpiece. Driven by the main shaft, it rotates at high speed around the axis. During the rotation process, the extrusion effect of the mushroom head forms a short-stroke continuous forging. As a result, the workpiece undergoes local uniform diameter reduction, is formed along the forging die shape line, and extends axially, thereby completing a small incremental forging deformation of the blank.

[0003] At present, most domestic equipment manufacturers use single-spindle rotary forging machines, such as the patent application named "A bar outer diameter rotary forging machine" (publication number: CN222058720U) and the patent application named "A new type of rotary forging machine" (publication number: CN216126512U). Single-spindle rotary forging machines have small processing diameters and weak forging capabilities, and cannot effectively process billets with larger diameters and thicker walls. In addition, current domestic equipment is all horizontal rotary forging machines, such as the patent application named "An automatic rotary forging machine" (publication number: CN206343580U) and the patent application named "A precision parts processing rotary forging machine" (publication number: CN218460748U). Increasing the forging diameter of the rotary forging machine will make the forging die mass too large. During the forging process, due to the influence of gravity, the centrifugal force generated by the rotation of the spindle will be insufficient to lift the forging die, or the forging forces on the upper and lower sides will be different. Summary of the invention

[0004] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide a vertical dual-spindle rotary forging machine, which can not only realize the processing of larger diameter pipes and bars and ensure the forming of the inner hole of the pipe, but also solve the problem that the pipe and bar cannot be effectively forged due to the large mass of the forging die.

[0005] In order to achieve the above object, the present invention is implemented by the following technical solutions:

[0006] A vertical dual-spindle rotary forging machine includes a vertical bed 36, a forging unit 38, a feeding mechanism 39 and a core feeding and pulling mechanism 40; the forging unit 38 is connected to the middle of the vertical bed 36, a box front cover 21 is arranged above the forging unit 38, and the box front cover 21 is connected to the vertical bed 36; a feeding mechanism 39 is installed on the upper part of the vertical bed 36, and a core feeding and pulling mechanism 40 is arranged inside the feeding mechanism 39; a square rubber shock-absorbing support 32 is arranged between the middle and upper parts of the vertical bed 36 to form a flexible shock-absorbing layer.

[0007] The square rubber shock-absorbing support 32 is formed by rubber layers 34 and steel plate layers 33 being stacked alternately.

[0008] The forging unit 38 includes four forging dies 1 arranged to rotate around an axis, the outer sides of the forging dies 1 are all in contact with the mushroom heads 2, the outer sides of the mushroom heads 2 are provided with rollers 3, the rollers 3 are assembled in the roller cages 4, a large cover plate 22 is provided above the roller cages 4, and the large cover plate 22 is connected to the roller cages 4; a large face plate 10 is provided below the forging dies 1 and the mushroom heads 2, a face plate cover plate 14 is provided above the forging dies 1 and the mushroom heads 2, the face plate cover plate 14 is fixed to the large face plate 10, and the forging dies 1 and the mushroom heads 2 are constrained by the large face plate 10 The large faceplate 10 has a plurality of degrees of freedom, so that the forging die 1 and the mushroom head 2 can only move radially; the inner side of the large faceplate 10 is wound with a magnetic suspension coil 35, and the magnetic suspension coil 35 generates a repulsive force on the forging die 1 and the mushroom head 2 when the equipment is running, so that the forging die 1 and the mushroom head 2 are suspended; an inner ring shaft 11 is arranged below the large faceplate 10, the top of the inner ring shaft 11 is connected to the large faceplate 10, the bottom of the inner ring shaft 11 is connected to the inner ring driven wheel 12, the inner ring driven wheel 12 is connected to the inner ring motor 13 through a belt drive, and the inner ring motor 13 is fixed to the left side of the vertical bed 36;

[0009] A steel ring 5 is arranged on the outside of the roller 3, and the steel ring 5 is connected to the outer steel ring shell 6, and the bottom of the steel ring shell 6 is connected to the outer ring shaft 7, and the outer ring shaft 7 is connected to the outer ring driven wheel 8 at the bottom, and the outer ring driven wheel 8 is connected to the outer ring motor 9 through a belt drive, and the outer ring motor 9 is fixed on the right side of the vertical bed 36; the outer ring shaft 7 and the outer ring driven wheel 8 have large masses and play the role of a flywheel;

[0010] A support ring 16 is arranged between the outer ring shaft 7 and the inner ring shaft 11. The inner side of the support ring 16 is fixed to the inner ring shaft 11 through a deep groove ball bearing 17 and a tapered roller bearing 18, and the outer side of the support ring 16 is fixed to the outer ring shaft 7 through an outer ring angular contact ball bearing 19; an end cover 15 is arranged on the top of the support ring 16, and the bottom of the support ring 16 is in contact with the vertical bed 36; a rear bearing cover 20 is arranged below the tapered roller bearing 18.

[0011] The feeding mechanism 39 includes four slide rails 23 fixed on the upper part of the vertical bed 36, and slides 24 are installed on the slide rails 23. The slides 24 are connected to the clamping head 25. Four clamps 26 are installed at the bottom of the clamping head 25. Feeding hydraulic cylinders 27 are arranged on both sides of the clamping head 25. The feeding hydraulic cylinders 27 are fixed on both sides of the clamping head 25 through feeding hydraulic cylinder positioning plates 31. The bottom of the feeding hydraulic cylinder 27 is connected to the front cover 21 of the box body; a feeding mechanism rear box 28 is arranged above the clamping head 25.

[0012] The core-pulling mechanism 40 includes a core-pulling hydraulic cylinder mounting seat 29, a core-pulling hydraulic cylinder 30 and a core shaft 37. The core-pulling hydraulic cylinder mounting seat 29 is fixed inside the rear box 28 of the feeding mechanism, and the core-pulling hydraulic cylinder 30 is fixed above the core-pulling hydraulic cylinder mounting seat 29. The end of the core-pulling hydraulic cylinder 30 is equipped with a core shaft 37, and the core shaft 37 and the core-pulling hydraulic cylinder 30 are rigidly connected through a threaded pair.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] 1. Since the present invention adopts a dual-spindle structure, compared with the single-spindle structure of traditional rotary forging equipment, the forging energy is less restricted by the size of the driving steel ring. The dual-spindle structure is arranged in a forging unit with limited space, which can effectively improve the forging energy and ensure the stable output of the forging forming force.

[0015] 2. Since the feeding mechanism of the present invention adopts a symmetrically arranged hydraulic cylinder structure, the single hydraulic cylinder torque and instability problems caused by the feeding hydraulic cylinder deviating from the equipment axis to prevent interference with the position of the core-feeding hydraulic cylinder can be avoided. At the same time, the structure of the double feeding hydraulic cylinder arrangement can not only reduce the vibration of the feeding mechanism during the forging process and ensure the feeding accuracy, but also increase the upper limit of the maximum feeding force of the feeding mechanism.

[0016] 3. Since the present invention adopts a vertical bed structure, it can effectively avoid the increase in the mass of the forging die due to the increase in the forging diameter of the rotary forging machine in traditional horizontal equipment. As a result, when the mass of the forging die exceeds the critical value, the centrifugal force cannot effectively overcome the deadweight of the forging die, which easily leads to the failure of forging die lifting and asymmetry of the forging forces of the upper and lower forging dies. At the same time, a magnetic levitation coil is integrated on the large faceplate structure, and a controllable repulsive force field is generated for the forging die and the mushroom head through real-time electromagnetic regulation during the forging process, so that the forging die and the mushroom head remain suspended during the forging process, significantly reducing the friction and wear between the contact surface and the large faceplate, and increasing the service life of the forging die and the mushroom head.

[0017] 4. Since the present invention sets a square rubber shock-absorbing support composed of rubber layers and steel plate layers stacked in the middle of the vertical bed, during the forging process of the equipment, when the vibration energy is transmitted from bottom to top through the bed, since the steel plate layer has no constraint effect on shear deformation, its horizontal stiffness is mainly determined by the hardness of the rubber itself. This structure can effectively absorb the horizontal vibration energy generated by the forging unit, thereby significantly reducing the vibration amplitude of the feeding mechanism and the core-pulling mechanism during the forging process, and ensuring the movement accuracy and positioning stability of the feeding mechanism and the core-pulling mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 2 is a front view of an embodiment of the present invention.

[0019] Figure 2 It is a right sectional view of an embodiment of the present invention.

[0020] Figure 3 It is a front sectional view of the vertical bed according to an embodiment of the present invention.

[0021] Figure 4 It is a schematic diagram of the structure of a square rubber shock-absorbing support according to an embodiment of the present invention.

[0022] Figure 5 It is a right sectional view of the forging unit according to the embodiment of the present invention.

[0023] Figure 6 It is a schematic cross-sectional view of a roller-mushroom head-forging die according to an embodiment of the present invention.

[0024] Figure 7 It is a schematic structural diagram of a large faceplate of a forging unit according to an embodiment of the present invention.

[0025] Figure 8 It is a front view of the feeding mechanism and the core-pulling mechanism of the embodiment of the present invention.

[0026] Fig. 9 It is a front cross-sectional view of the feeding mechanism and the core-pulling mechanism of the embodiment of the present invention. DETAILED DESCRIPTION

[0027] The technical solution of the present invention is further described below in conjunction with embodiments and drawings.

[0028] like Figure 1-4 As shown, a vertical double-spindle rotary forging machine includes a vertical bed 36, a forging unit 38, a feeding mechanism 39 and a core feeding and pulling mechanism 40; the forging unit 38 is connected to the middle of the vertical bed 36, a box front cover 21 is arranged above the forging unit 38, and the box front cover 21 is connected to the vertical bed 36 by screws; a feeding mechanism 39 is installed on the upper part of the vertical bed 36, and a core feeding and pulling mechanism 40 is arranged inside the feeding mechanism 39; a square rubber shock-absorbing support 32 is arranged between the middle and upper parts of the vertical bed 36 to form a flexible shock-absorbing layer; the square rubber shock-absorbing support 32 is made of rubber The rubber layer 34 and the steel plate layer 33 are staggered and stacked with each other to achieve the purpose of reducing the vibration of the feeding mechanism 39 during the forging of the equipment; when the equipment is running, when the vibration energy is transmitted from bottom to top through the vertical bed 36, since the steel plate layer 33 has no constraint effect on the shear deformation, its horizontal stiffness is mainly determined by the hardness of the rubber layer 34 itself. This structure can effectively absorb the horizontal vibration energy generated by the forging unit 38, thereby significantly reducing the vibration amplitude of the feeding mechanism 39 and the core feeding and pulling mechanism 40 during the forging process, and ensuring the movement accuracy and positioning stability of the feeding mechanism 39 and the core feeding and pulling mechanism 40.

[0029] like Figure 5-7As shown, the forging unit 38 includes four forging dies 1 arranged to rotate around an axis, the outer sides of the forging dies 1 are all in contact with the mushroom heads 2, the outer sides of the mushroom heads 2 are provided with rollers 3, the rollers 3 are assembled in the roller cages 4, a large cover plate 22 is provided above the roller cages 4, and the large cover plate 22 is connected to the roller cages 4 by screws; a large face plate 10 is provided below the forging dies 1 and the mushroom heads 2, a face plate cover plate 14 is provided above the forging dies 1 and the mushroom heads 2, and the face plate cover plate 14 is fixed to the large face plate 10 by screws, and the large face plate 10 constrains the degrees of freedom of the forging dies 1 and the mushroom heads 2, so that the forging dies 1 and the mushroom heads 2 can be fixed to each other. The head 2 can only move radially; a magnetic suspension coil 35 is wound on the inner side of the large faceplate 10. When the equipment is running, the magnetic suspension coil 35 generates a repulsive force on the forging die 1 and the mushroom head 2, so that the forging die 1 and the mushroom head 2 are suspended, which significantly reduces the friction and wear between the contact surface and the large faceplate 10; an inner ring shaft 11 is arranged below the large faceplate 10, the top of the inner ring shaft 11 is connected to the large faceplate 10 by screws, the bottom of the inner ring shaft 11 is connected to the inner ring driven wheel 12 by a flat key, the inner ring driven wheel 12 is connected to the inner ring motor 13 by belt drive, and the inner ring motor 13 is fixed to the left side of the vertical bed 36 by screws;

[0030] A steel ring 5 is arranged on the outside of the roller 3, and the steel ring 5 is connected to the outer steel ring shell 6 through a flat key, and the bottom of the steel ring shell 6 is connected to the outer ring shaft 7 through a screw, and the outer ring shaft 7 is connected to the outer ring driven wheel 8 at the bottom through a flat key, and the outer ring driven wheel 8 is connected to the outer ring motor 9 through a belt drive, and the outer ring motor 9 is fixed to the right side of the vertical bed 36 through screws; the outer ring shaft 7 and the outer ring driven wheel 8 have a large mass, can play the role of a flywheel, and have the functions of stabilizing the rotation speed, smoothing the movement and storing energy;

[0031] A support ring 16 is arranged between the outer ring shaft 7 and the inner ring shaft 11. The inner side of the support ring 16 is fixed to the inner ring shaft 11 through a deep groove ball bearing 17 and a tapered roller bearing 18, and the outer side of the support ring 16 is fixed to the outer ring shaft 7 through an outer ring angular contact ball bearing 19; an end cover 15 is arranged on the top of the support ring 16, and the bottom of the support ring 16 is in contact with the vertical bed 36; a rear bearing cover 20 is arranged below the tapered roller bearing 18; when the equipment is running, the outer ring motor 9 drives the outer ring driven wheel 8, the outer ring shaft 7, and the steel ring housing 6 and the steel ring 5 rotate clockwise around the axis, the retaining frame 4 passively rotates clockwise around the axis through the friction between the roller 3 and the steel ring 5, the inner ring motor 13 drives the inner ring driven wheel 12, the inner ring shaft 11 and the large faceplate 10 to rotate counterclockwise around the axis, the forging die 1 and the mushroom head 2 passively rotate counterclockwise around the axis under the constraint of the large faceplate 10, and the mushroom head 2 collides with the roller 3 under the action of centrifugal force to generate radial downward pressure, and the mushroom head 2 transmits the downward pressure to the forging die 1, and the forging die 1 directly contacts with the blank, thereby realizing high-frequency continuous forging of the blank.

[0032] like Figure 1 , Figure 8and Fig. 9 As shown, the feeding mechanism 39 includes four slide rails 23 fixed on the upper part of the vertical bed 36, and slides 24 are installed on the slide rails 23. The slides 24 move axially along the slide rails 23. The slides 24 are connected to the clamping head 25 by screws. Four clamps 26 are installed at the bottom of the clamping head 25. Feeding hydraulic cylinders 27 are arranged on both sides of the clamping head 25. The feeding hydraulic cylinders 27 are fixed on both sides of the clamping head 25 by feeding hydraulic cylinder positioning plates 31. The bottom of the feeding hydraulic cylinders 27 is connected to the front cover 21 of the box body by nuts; a feeding mechanism rear box 28 is arranged above the clamping head 25.

[0033] The core-pulling mechanism 40 includes a core-pulling hydraulic cylinder mounting seat 29, a core-pulling hydraulic cylinder 30 and a core shaft 37. The core-pulling hydraulic cylinder mounting seat 29 is fixed to the inside of the feeding mechanism rear box 28 by screws, and the core-pulling hydraulic cylinder 30 is fixed above the core-pulling hydraulic cylinder mounting seat 29 by screws. The core-pulling hydraulic cylinder 30 is equipped with a core shaft 37 at the end of the core-pulling hydraulic cylinder 30. The core shaft 37 and the core-pulling hydraulic cylinder 30 are rigidly connected by a precisely machined thread pair. When the blank needs to be processed, the clamping head 25 controls the chuck 26 to contract to clamp and fix the blank, and the feeding hydraulic cylinders 27 on both sides are started. It can drive the feeding mechanism 39 and the core-pulling mechanism 40 to move along the slide rail 23 toward the forging unit 38. When the billet approaches the forging unit 38, the feeding mechanism 39 stops moving, the core-pulling hydraulic cylinder 30 extends and allows the core shaft 37 to stay at the inlet of the forging unit 38, and then the feeding hydraulic cylinder 27 drives the feeding mechanism 39 and the core-pulling mechanism 40 to move slowly downward to achieve billet forging. During forging, the core-pulling hydraulic cylinder 30 slowly contracts to ensure that the core shaft 37 and the forging die 1 remain relatively stationary in the axial direction. After forging is completed, the feeding mechanism 39 and the core-pulling mechanism 40 are simultaneously retracted under the drive of the feeding hydraulic cylinder 27.

Claims

1. A vertical dual-spindle rotary forging machine, comprising a vertical bed (36), a forging unit (38), a feeding mechanism (39) and a core feeding and pulling mechanism (40); characterized in that: The forging unit (38) is connected to the middle of the vertical bed (36); a box front cover (21) is arranged above the forging unit (38), and the box front cover (21) is connected to the vertical bed (36); a feeding mechanism (39) is installed on the upper part of the vertical bed (36), and a core feeding and pulling mechanism (40) is arranged inside the feeding mechanism (39); a square rubber shock-absorbing support (32) is arranged between the middle and upper parts of the vertical bed (36) to form a flexible shock-absorbing layer.

2. A vertical dual-spindle rotary forging machine according to claim 1, characterized in that: The square rubber shock-absorbing support (32) is formed by rubber layers (34) and steel plate layers (33) being stacked alternately.

3. A vertical dual-spindle rotary forging machine according to claim 1, characterized in that: The forging unit (38) comprises four forging dies (1) arranged to rotate around an axis, the outer sides of the forging dies (1) are all in contact with the mushroom head (2), the outer sides of the mushroom head (2) are provided with rollers (3), the rollers (3) are assembled in the roller retainer (4), a large cover plate (22) is provided above the roller retainer (4), and the large cover plate (22) is connected to the roller retainer (4); a large face plate (10) is provided below the forging die (1) and the mushroom head (2), a face plate cover plate (14) is provided above the forging die (1) and the mushroom head (2), the face plate cover plate (14) is fixed to the large face plate (10), and the forging die (1) and the mushroom head are constrained by the large face plate (10). (2) has a degree of freedom, so that the forging die (1) and the mushroom head (2) can only move in the radial direction; a magnetic suspension coil (35) is wound on the inner side of the large faceplate (10), and when the equipment is running, the magnetic suspension coil (35) generates a repulsive force on the forging die (1) and the mushroom head (2), so that the forging die (1) and the mushroom head (2) are suspended; an inner ring shaft (11) is arranged below the large faceplate (10), the top of the inner ring shaft (11) is connected to the large faceplate (10), the bottom of the inner ring shaft (11) is connected to the inner ring driven wheel (12), the inner ring driven wheel (12) is connected to the inner ring motor (13) through a belt drive, and the inner ring motor (13) is fixed to the left side of the vertical bed (36); A steel ring (5) is arranged on the outside of the roller (3), the steel ring (5) is connected to the outer steel ring shell (6), the bottom of the steel ring shell (6) is connected to the outer ring shaft (7), the outer ring shaft (7) is connected to the outer ring driven wheel (8) at the bottom, the outer ring driven wheel (8) is connected to the outer ring motor (9) through a belt drive, and the outer ring motor (9) is fixed on the right side of the vertical bed (36); the outer ring shaft (7) and the outer ring driven wheel (8) have a large mass and play the role of a flywheel; A support ring (16) is arranged between the outer ring shaft (7) and the inner ring shaft (11); the inner side of the support ring (16) is fixed to the inner ring shaft (11) via a deep groove ball bearing (17) and a tapered roller bearing (18); the outer side of the support ring (16) is fixed to the outer ring shaft (7) via an outer ring angular contact ball bearing (19); an end cover (15) is arranged on the top of the support ring (16); the bottom of the support ring (16) is fitted with the vertical bed (36); and a rear bearing cover (20) is arranged below the tapered roller bearing (18).

4. A vertical dual-spindle rotary forging machine according to claim 1, characterized in that: The feeding mechanism (39) comprises four slide rails (23) fixed on the upper part of the vertical bed (36), and slide platforms (24) are installed on the slide rails (23). The slide platforms (24) are connected to the clamping head (25), and four clamping heads (26) are installed at the bottom of the clamping head (25). Feeding hydraulic cylinders (27) are arranged on both sides of the clamping head (25). The feeding hydraulic cylinders (27) are fixed on both sides of the clamping head (25) through feeding hydraulic cylinder positioning plates (31), and the bottom of the feeding hydraulic cylinders (27) is connected to the front cover (21) of the box body; a feeding mechanism rear box (28) is arranged above the clamping head (25).

5. A vertical dual-spindle rotary forging machine according to claim 4, characterized in that: The core-pulling mechanism (40) comprises a core-pulling hydraulic cylinder mounting seat (29), a core-pulling hydraulic cylinder (30) and a core shaft (37). The core-pulling hydraulic cylinder mounting seat (29) is fixed inside the rear box (28) of the feeding mechanism, and the core-pulling hydraulic cylinder (30) is fixed above the core-pulling hydraulic cylinder mounting seat (29). The end of the core-pulling hydraulic cylinder (30) is equipped with a core shaft (37), and a rigid connection is achieved between the core shaft (37) and the core-pulling hydraulic cylinder (30) through a threaded pair.

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