Inner gear ring rolling lower die device and inner gear ring rolling equipment

Abstract

The utility model discloses an inner gear ring rolling lower die device and inner gear ring rolling equipment, and belongs to the field of gear ring manufacturing. According to the technical scheme, the inner gear ring rolling lower die device comprises a rotating mechanism and a clamping structure, the clamping mechanism is arranged on a rotating part of the rotating mechanism and comprises a self-centering chuck, the self-centering chuck comprises a chuck base and a plurality of clamping jaws, arc-shaped plates are arranged at the inner ends of the clamping jaws, and the center of the self-centering chuck serves as the circle center of the arc-shaped plates. The self-centering chuck has the advantages that on the basis of the self-centering chuck, the arc-shaped plates are arranged at the inner ends of the clamping jaws of the chuck and attached to a circular blank, more stable clamping is achieved, meanwhile, pressure caused by clamping force is reduced, workpiece deformation is reduced, the chuck is provided with the rotating mechanism, and the blank can be rotated according to the inner gear ring in an indexing mode conveniently.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of gear ring manufacturing, in particular to a inner gear ring rolling lower mould device and a inner gear ring rolling equipment. BACKGROUND

[0002] The main advantages of the inner helical gear ring include: high efficiency, the meshing contact of the inner helical gear ring is continuous, thus being able to provide smooth and efficient power transmission; noise and vibration reduction, the meshing contact of the inner helical gear ring is gradual, thus the use of the helical gear ring transmission can effectively reduce noise and vibration; strong carrying capacity, the inner helical gear ring has more meshing contact surfaces, thus its carrying capacity is stronger than that of the straight gear ring, which enables the inner helical gear ring to provide better performance in heavy load applications. Therefore, the inner helical gear ring plays an important role in the field of industrial transmission systems and is widely used in automobiles, airplanes, heavy machinery and various industrial equipment.

[0003] The traditional cutting process of the inner tooth type part has the problems of low material utilization rate, large energy loss, low machining efficiency, and the cutting process affects the metal fiber flow on the surface of the cut part, reduces the surface strength of the part, and shortens the service life of the part. The extrusion and rolling incremental forming process can realize the extrusion and rolling incremental forming of the large tooth high inner helical gear ring multi-mold, form the inner helical gear ring with small forming force, keep the metal flow line of the formed workpiece surface continuous and distributed along the tooth shape, and have work hardening effect, so that the tooth shape strength of the gear is greatly improved.

[0004] The workpiece clamping and indexing are key equipment affecting the forming efficiency and forming quality. UTILITY MODEL CONTENTS

[0005] The utility model provides a inner gear ring rolling lower mould device for the current inner helical gear ring extrusion and rolling incremental forming process.

[0006] To achieve the above object, the utility model adopts the technical scheme of a inner gear ring rolling lower mould device, which comprises a rotating mechanism and a clamping structure, the clamping structure is arranged on the rotating part of the rotating mechanism, the clamping structure comprises a self-centering chuck, the self-centering chuck comprises a chuck seat and a plurality of clamping jaws, the inner end of the clamping jaw is provided with an arc plate, and the arc plate takes the center of the self-centering chuck as the center. This scheme sets the arc plate at the inner end of the chuck clamping jaw based on the self-centering chuck, which is in close contact with the round blank, realizes more stable clamping, reduces the pressure caused by clamping force, reduces workpiece deformation, and the chuck is provided with the rotating mechanism, which facilitates the indexing rotation of the blank according to the inner gear ring.

[0007] Preferably, when the clamping jaw is retracted to the set position, the plurality of arc plates enclose a closed circle. The blank is completely surrounded, and the outer contour deformation is limited.

[0008] Preferably, the self-centering chuck has six claws.

[0009] Preferably, the claw comprises a seat body and a claw body; one of the seat body and the claw body is provided with a circumferential protrusion, and the other is provided with a circumferential clamping groove; the circumferential protrusion and the circumferential clamping groove are matched with each other; an arc-shaped plate is arranged on the claw body; and the seat body is mounted on the chuck seat.

[0010] Preferably, one of the seat body and the claw body is provided with a radial protrusion, and the other is provided with a radial clamping groove; the radial protrusion and the radial clamping groove are matched with each other; and the seat body and the claw body of the claw are prevented from being circumferentially dislocated.

[0011] Preferably, the rotator structure comprises a central gear and a plurality of driving gears; the central gear is fixedly installed on the bottom surface of the chuck seat in a concentric manner; the plurality of driving gears are arranged around the central gear and are in meshing connection with the central gear; and the driving gears are connected with driving structures.

[0012] Preferably, the chuck seat is internally provided with a driving disc; the top surface of the driving disc is provided with an Archimedes spiral groove; the bottom surface of the claw is provided with a protruding tooth; and the protruding tooth is matched with the Archimedes spiral.

[0013] Preferably, the bottom surface of the driving disc is provided with a radial tooth; the chuck seat is further provided with a bevel gear; the bevel gear is in meshing connection with the radial tooth; the gear shaft of the bevel gear is arranged along the radial direction of the chuck seat; and the outer end of the gear shaft is located on the outer circumferential surface of the chuck seat, and the end is provided with a square hole.

[0014] Preferably, the bevel gear is provided with a plurality of bevel gears; the plurality of bevel gears are uniformly distributed along the circumferential direction of the chuck seat and are in meshing connection with the driving disc.

[0015] In another aspect, the utility model also provides a kind of inner gear ring rolling equipment, and the inner gear ring rolling lower die device is used.

[0016] It can be seen from the above technical scheme that the utility model has the advantages that: the present scheme provides a kind of lower die device specially used for inner gear ring rolling manufacturing, the outer periphery of blank piece is surrounded and clamped by a plurality of claws and arc-shaped plates thereon, and can be matched with the indexing rotation of inner gear ring, so that the fixing strength of blank piece is greatly improved, the compression deformation of blank piece is reduced, and the workpiece precision is improved;The present device can accurately realize the radial feeding of a plurality of clamping claws at the same time to ensure the positioning accuracy of clamped workpiece, and the planetary gear transmission has the advantages of high transmission efficiency, high transmission accuracy and large torque, so that the accuracy of rotation indexing is improved;Furthermore, the inner gear ring rolling equipment provided by the utility model has high forming efficiency and high machining precision. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to make the technical scheme of the utility model more apparent and easy to understand, the following will briefly introduce the drawings needed to be used in the description, obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0018] Figure 1 It is the structural schematic diagram of the embodiment one of the utility model.

[0019] Figure 2 It is the structural schematic diagram of the driving disc in the embodiment one of the utility model.

[0020] Figure 3 It is the structural schematic diagram of the bevel gear in the embodiment one of the utility model.

[0021] Main drawing mark explanation

[0022] 1. claw, 1-1. seat, 1-2. claw body, 2. arc plate, 3. center gear, 4. driving gear, 5. driving disc, 6. bevel gear, 7. chuck seat. Specific implementation

[0023] In order to make the technical scheme of the utility model more apparent and easy to understand, the following will briefly introduce the drawings needed to be used in the description, obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0024] Embodiment one

[0025] As shown in Figure 1 A kind of inner tooth ring rolling lower die device, including rotary mechanism and clamping structure, clamping structure is arranged on the rotating part of rotary mechanism, clamping structure includes self-centering chuck, and self-centering chuck includes chuck seat and multiple claws 1, in the embodiment, the inner end of the six claws 1 in the self-centering chuck is provided with arc plate 2, arc plate 2 is with the center of self-centering chuck as center, when multiple claws 1 are retracted to set position, multiple arc plates 2 enclose closed circle.

[0026] The claw 1 is a split structure, including a seat body 1-1 and a claw body 1-2; one of the seat body 1-1 and the claw body 1-2 is provided with a circumferential protrusion, and the other is provided with a circumferential clamping groove; one of the seat body 1-1 and the claw body 1-2 is provided with a radial protrusion, and the other is provided with a radial clamping groove; the circumferential protrusion and the circumferential clamping groove are matched with each other, and the radial protrusion and the radial clamping groove are matched with each other; through the concave-convex matching in the circumferential and radial directions, the claw body of the claw can be replaced to adapt to different size parameters, and the strength of the claw as a whole is improved in the clamping direction and the rotating direction through the hard contact, so that movement between the seat body and the claw body is prevented, and the machining precision and the allowable clamping force are improved. The arc-shaped plate is arranged on the claw body, the seat body 1-1 is installed on the chuck seat, and specifically, as shown in Figure 2 、 3 , the inside of the chuck seat is provided with a driving disc 5, the top surface of the driving disc 5 is provided with an Archimedes spiral groove, the bottom surface of the claw 1 is provided with a protruding tooth, the protruding tooth is matched with the Archimedes spiral, the bottom surface of the driving disc 5 is provided with a radial tooth, the chuck seat is further provided with a bevel gear 6, the bevel gear is meshed with the radial tooth, the gear shaft of the bevel gear 6 is arranged along the radial direction of the chuck seat, the outer end of the gear shaft is located on the outer circumferential surface of the chuck seat, and the end is provided with a square hole for a worker to rotate the bevel gear by using a tool to move the claw to the center or away from the center to realize the clamping or loosening of the workpiece (for reference can be made to the principle of the manual three-claw chuck on the vehicle window), and a bearing can be arranged between the outer end of the gear shaft of the bevel gear and the chuck seat to reduce wear and make the rotation smoother. In the embodiment, the bevel gear 6 is provided with three, the three bevel gears 6 are uniformly distributed along the circumferential direction of the chuck seat at an interval of 120° and are all meshed with the driving disc, and when the workpiece is subjected to the pressure of the upper die, the pressure is transmitted to the claw and the rotating disc, and the arrangement of the plurality of bevel gears 6 on the ground of the rotating disc can evenly share the pressure, so that the support of the rotating disc is more stable.

[0027] As shown in Figure 1 , the structure of the rotary device includes a central gear 3 and three driving gears 4 (in other embodiments, the number can be other), the central gear 3 is fixedly installed concentrically on the bottom surface of the chuck seat, the plurality of driving gears 4 are uniformly distributed in the circumferential direction, surround the central gear 3 and are all meshed with the central gear 3, and the driving gears 4 are all connected with driving structures such as driving motors to drive the central gear and the chuck thereon in the form of a planetary gear set.

[0028] Embodiment two

[0029] An inner tooth ring rolling equipment adopts the inner tooth ring rolling lower die device provided in the embodiment one, and is further provided with an upper die for rolling forming the inner tooth ring. The upper die part can adopt the existing rolling upper die device, such as a press machine matched with a tooth-shaped cutter, which will not be described herein.

[0030] The beneficial effects of the present application are that, compared with the prior art, the multi-die extrusion-rolling forming equipment for the inner helical gear ring has simple and compact structure, and can greatly reduce the tonnage required by the equipment due to the local forming of the multi-die in single pass; during the working of the extrusion-rolling forming equipment, the working mechanism only needs to rotate or move linearly around the equipment axis at the same time, and the movement is simple; and the extrusion-rolling forming equipment for the inner helical gear ring has low cost, high efficiency and long service life.

[0031] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An inner ring roll-down die device characterized by, The self-centering chuck comprises a chuck base and a plurality of clamping jaws, inner ends of the clamping jaws are provided with arc-shaped plates, the arc-shaped plates are centered on the center of the self-centering chuck, when the clamping jaws are retracted to a set position, the arc-shaped plates enclose a closed circle; the clamping jaw comprises a seat body and a jaw body, one of the seat body and the jaw body is provided with a circumferential protrusion, the other is provided with a circumferential clamping groove, the circumferential protrusion and the circumferential clamping groove are clamped with each other, the arc-shaped plate is arranged on the jaw body, the seat body is mounted on the chuck base, one of the seat body and the jaw body is provided with a radial protrusion, the other is provided with a radial clamping groove, the radial protrusion and the radial clamping groove are clamped with each other.

2. The inner ring rolling die set according to claim 1, wherein The self-centering chuck is provided with six clamping jaws.

3. The inner ring rolling die set according to claim 1, wherein The rotator structure comprises a central gear and a plurality of drive gears, the central gear is fixedly installed on the bottom surface of the chuck base in a concentric manner, the plurality of drive gears are arranged around the central gear and are in meshing connection with the central gear, and the drive gears are connected with drive structures.

4. The inner ring rolling die set apparatus according to claim 1, wherein, The inner part of the chuck base is provided with a driving disc, the top surface of the driving disc is provided with an Archimedes spiral groove, the bottom surface of the clamping jaw is provided with a protruding tooth, and the protruding tooth is matched with the Archimedes spiral.

5. The inner ring rolling die set according to claim 4, wherein The bottom surface of the driving disc is provided with a radial tooth, the chuck base is further provided with a bevel gear, the bevel gear is in meshing connection with the radial tooth, the gear shaft of the bevel gear is arranged in the radial direction of the chuck base, the outer end of the gear shaft is located on the outer circumferential surface of the chuck base, and the end is provided with a square hole.

6. The inner ring rolling die set according to claim 5, wherein The bevel gear is provided with a plurality of bevel gears, the plurality of bevel gears are uniformly distributed in the circumferential direction of the chuck base and are in meshing connection with the driving disc.

7. A gear rim rolling apparatus characterized by, The inner tooth ring rolling lower die device is adopted.

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