Distributing device used before profiling ring rolling of oversize tapered roller bearing inner sleeve

Abstract

The utility model relates to the technical field of bearing manufacturing, in particular to a material distributing device used before profiling ring rolling of an inner sleeve of a super-huge tapered roller bearing, which comprises a U-shaped fixing frame and a material distributing plate, and a horse rod capable of rotating stretches across the top of the U-shaped fixing frame so as to drive a forge piece sleeved on a rod body of the horse rod to rotate; an inverted isosceles trapezoid male die is arranged on the lower plate face, corresponding to the transverse middle of the U-shaped fixing frame, of the material distributing plate, and the two inclined side faces of the isosceles trapezoid male die correspondingly face the two ends of the forge piece correspondingly. Due to the fact that rotation of the horse rod can drive a forge piece to rotate through friction force, the forge piece and the material distributing plate move downwards, the middle of the forge piece is rolled and pressed into a groove, material distributing of the forge piece is completed after two circles of even rotation rolling, and in the rolling process, materials, pressed out of the groove, in the middle of the forge piece can move outwards. The materials at the two ends of the forge piece are increased, and chamfers at the large flanges are filled in the subsequent ring rolling process.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing manufacturing, in particular to a blanking device for a large tapered roller bearing inner ring before profiling ring rolling. Background Art

[0002] The diameter of the inner ring of a large tapered roller bearing generally reaches more than 2m. The existing processing of such large tapered roller bearing inner rings usually adopts a profiling forging method of two-piece combined forging directly on a horizontal ring rolling machine for the forgings after piercing. This profiling forging method has the following defects: 1. More raw materials are required for the forgings, which not only causes material waste (the machining allowance is large), but also affects the processing of each forging process (the large machining allowance increases the processing difficulty). Otherwise, the chamfer at the large rib of the forging is likely to be not filled, resulting in quality defects at the large rib of the forging in the subsequent ring rolling process, and further leading to the scrapping of the forging. Especially when the forging is unevenly divided, the small half forging is extremely likely to have the situation that the chamfer at the large rib in the subsequent ring rolling process is not filled, causing quality defects.

[0003] Therefore, we have designed a blanking device for a large tapered roller bearing inner ring before profiling ring rolling, which can symmetrically blank the forging before the profiling ring rolling process. Summary of the Utility Model

[0004] In order to overcome the deficiencies in the background art, the utility model discloses a blanking device for a large tapered roller bearing inner ring before profiling ring rolling.

[0005] To achieve the above invention purpose, the utility model adopts the following technical solutions:

[0006] A blanking device for a large tapered roller bearing inner ring before profiling ring rolling includes a U-shaped fixing frame and a blanking plate. A rotatable horse rod is spanned across the top of the U-shaped fixing frame to drive the forging sleeved on its rod body to rotate; an inverted isosceles trapezoidal punch is provided on the lower plate surface of the blanking plate corresponding to the middle part of the U-shaped fixing frame in the transverse direction, and the two inclined sides of the isosceles trapezoidal punch respectively face the two ends of the forging, so as to press a groove in the middle of the rotating forging during the descending process to realize the function of symmetrically blanking the forging.

[0007] Preferably, an inverted isosceles triangular convex rib is provided in the middle of the lower end surface of the isosceles trapezoidal punch to facilitate pressing a blanking line in the middle of the rotating forging.

[0008] Preferably, it further includes positioning insertion rods. A plurality of positioning installation holes are provided at intervals along the longitudinal direction in the middle of the lower end surface of the isosceles trapezoidal punch; positioning columns corresponding to and mating with the positioning installation holes are provided on the top surface of the isosceles triangular convex rib; the positioning insertion rods vertically penetrate the positioning installation holes and the positioning columns to facilitate fixing the positioning columns.

[0009] Preferably, a longitudinally penetrating mating groove is provided in the transverse middle of the lower end surface of the isosceles trapezoidal punch, and the top of the isosceles triangular convex ridge is matched and embedded in the groove cavity of the mating groove.

[0010] Preferably, the U-shaped fixing frame is provided with a centering clamping device which is sleeved on the horse pole shaft forging for centering.

[0011] Preferably, the centering clamping device includes a bidirectional threaded sleeve, both sections of which are threadedly fitted with studs, a section of the stud facing away from the bidirectional threaded sleeve slides through the corresponding U-shaped fixing frame side wall, and the end of this section of the stud is fixedly connected to a clamping rod spaced parallel to it, and the inner end of the clamping rod slides through the U-shaped fixing frame side wall on the same side to facilitate contact with the corresponding end face of the forging.

[0012] Preferably, a ball bearing is provided at the inner end of the clamping rod.

[0013] Due to the adoption of the above-mentioned technical solution, the utility model has the following beneficial effects:

[0014] 1. The rotation of the horse rod can drive the forging to rotate through friction, and move downward with the dividing plate to roll the middle part of the forging to press out the groove. After two rounds of uniform rotation and rolling, the forging is divided. In the rolling process, the material at the position of the groove pressed out in the middle of the forging will move outward, so that the material at both ends of the forging is increased, so that the chamfer at the large rib in the subsequent rolling process is filled;

[0015] 2. The setting of the isosceles triangular ridges can press out a dividing line in the middle of the forging before rolling the grooves, which can effectively prevent the radial deviation of the forging during rolling. At the same time, a dividing line is left in the middle of the groove, which is convenient for the subsequent centering cutting of the forging. At the same time, the setting of the detachable installation of the isosceles triangular ridges can conveniently and quickly disassemble and assemble the isosceles triangular ridges, solving the problem of replacing the dividing plate and the isosceles trapezoidal punch due to damage to the isosceles triangular ridges. At this time, only the isosceles triangular ridges need to be replaced;

[0016] 3. The setting of the centering clamping device can realize the function of the clamping sleeve being arranged on the horse rod body forging by rotating the two-way threaded sleeve, which drives the two studs to move axially, and the studs drive the corresponding clamping rods to move axially, thereby realizing that the clamping sleeve is arranged on the horse rod body forging. Since the two clamping rods move synchronously and in opposite directions, the forging can also be centered. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the first structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the operation flow of the first structure of the utility model;

[0019] Figure 3 It is a schematic diagram of the second structure of the present utility model;

[0020] Figure 4 It is a schematic diagram of the operation process of the second structure of the present utility model;

[0021] Figure 5 It is an exploded assembly schematic diagram of an isosceles trapezoidal punch and an isosceles triangular convex rib in the second structure of the present utility model.

[0022] In the figure: 1. U-shaped fixing frame; 2. Horse rod; 3. Dividing plate; 4. Isosceles trapezoidal punch; 41. Positioning and installation hole; 42. Fitting groove; 5. Isosceles triangular convex rib; 51. Positioning column; 6. Positioning insertion rod; 7. Centering clamping device; 71. Bidirectional threaded sleeve; 72. Stud; 73. Clamping rod; 74. Ball. Specific implementation mode

[0023] The present utility model can be explained in detail through the following embodiments. The purpose of disclosing the present utility model is to protect all technical improvements within the scope of the present utility model. In the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right", etc. indicating the orientation or position relationship, it is only corresponding to the drawings of the present application for the convenience of describing the present utility model; it should be understood that if there are terms such as "end", "side", "end part", "side part", "transverse", "longitudinal", etc. indicating the orientation or position relationship, it is only corresponding to the length and width of the corresponding component, that is, the "end part" indicates the head and tail regions in the length direction of the corresponding component, and the "side part" indicates the head and tail regions in the width direction of the corresponding component; it is for the convenience of describing the present utility model rather than indicating or implying that the device or element referred to must have a specific orientation.

[0024] Example 1, in combination with the attached Figure 1-2 , a material dividing device before profiling ring rolling of the inner ring of a super-large tapered roller bearing, including a U-shaped fixing frame 1 and a dividing plate 3. A rotatable horse rod 2 is spanned across the top of the U-shaped fixing frame 1 to drive the forging sleeved on its rod body to rotate; on the lower plate surface of the dividing plate 3, an inverted isosceles trapezoidal punch 4 is provided corresponding to the middle part in the transverse direction of the U-shaped fixing frame 1, and the two inclined sides of the isosceles trapezoidal punch 4 respectively face the two end parts of the forging, so as to press out a groove in the middle part of the rotating forging during the descending process, realizing the function of symmetrically dividing the forging.

[0025] During use, first install the material distribution plate 3 on the external lifting mechanism, install the U-shaped fixing bracket 1 below the material distribution plate 3, and ensure that the U-shaped fixing bracket 1 is in a proper position. Then, sleeved the forging on the rod body of the horse rod 2, and then install the horse rod 2 on the top of the U-shaped fixing bracket 1. At the same time, connect the horse rod 2 with an external driving device that can drive its rotation. The external driving device drives the horse rod 2 to rotate. The horse rod 2 drives the forging to rotate in one direction through friction, and rotates a certain angle each time. At the same time, drive the material distribution plate 3 to move up and down through the external lifting mechanism, and roll the middle part of the forging in sequence to press out a groove. After uniformly rotating and rolling two circles, the material distribution of the forging is completed. And during the rolling process, the material at the position where the groove is pressed out in the middle of the forging will move outwards, increasing the material at both ends of the forging, so that the chamfer at the large flange during the subsequent ring rolling process is filled; among them, during material distribution rolling, material distribution is carried out according to the principle of equal cross-section. After the material distribution is completed, it can be placed on the numerical control ring rolling machine to carry out external diameter profiling ring rolling on the blank. If the material distribution is uneven and does not meet the equal cross-section requirement, there will be a shortage of material on the outer diameter of the forging, the large flange chamfer cannot be filled, and the subsequent lathe processing cannot be carried out, forming black skin, resulting in the scrapping of the forging.

[0026] Embodiment 2, in combination with the attached Figures 3-5 , a material distribution device before profiling ring rolling of the inner ring of a super-large tapered roller bearing. On the basis of Embodiment 1, an inverted isosceles triangular convex rib 5 is provided in the middle of the transverse direction of the lower end surface of the isosceles trapezoidal punch 4, so as to press out a material distribution line in the middle of the rotating forging.

[0027] Such a setting can press out a material distribution line in the middle of the forging through the isosceles triangular convex rib 5 before rolling the groove, which can effectively prevent the forging from radially shifting during rolling. At the same time, a material distribution line is left in the middle of the groove, which is convenient for subsequent centering cutting of the forging.

[0028] Furthermore, it also includes a positioning plug rod 6. A plurality of positioning installation holes 41 are provided at intervals along the longitudinal direction in the middle of the transverse direction of the lower end surface of the isosceles trapezoidal punch 4; the top surface of the isosceles triangular convex rib 5 has positioning columns 51 that are in one-to-one correspondence and mating with the positioning installation holes 41; the positioning plug rod 6 vertically penetrates through the positioning installation holes 41 and the positioning columns 51 to facilitate the fixing of the positioning columns 51.

[0029] Such a setting can disassemble and assemble the isosceles triangular convex rib 5 conveniently and quickly, and solve the problem that it is necessary to replace the material distribution plate 3 and the isosceles trapezoidal punch 4 due to the damage of the isosceles triangular convex rib 5. At this time, only the isosceles triangular convex rib 5 needs to be replaced.

[0030] Even further, a longitudinally penetrating fitting groove 42 is provided in the middle of the transverse direction of the lower end surface of the isosceles trapezoidal punch 4, and the top of the isosceles triangular convex rib 5 is fitted and embedded into the cavity of the fitting groove 42.

[0031] This arrangement allows the top of the isosceles triangular ridge 5 to be restrained by the matching groove 42 , thereby increasing the strength of the isosceles triangular ridge 5 and further extending the service life of the isosceles triangular ridge 5 .

[0032] Embodiment 3, in combination with the attached Figures 1-4 , a material dividing device before the profiling and rolling of the inner sleeve of an extra-large tapered roller bearing, based on the first or second embodiment, the U-shaped fixing frame 1 is provided with a centering clamping device 7 for centering the forged rod body of the horse rod 2;

[0033] The centering clamping device 7 includes a bidirectional threaded sleeve 71, and both ends of the bidirectional threaded sleeve 71 are threadedly matched with studs 72. A section of the stud 72 away from the bidirectional threaded sleeve 71 slides through the corresponding side wall of the U-shaped fixing frame 1, and the end of this section of the stud 72 is fixedly connected to a clamping rod 73 spaced parallel to it, and the inner end of the clamping rod 73 slides through the side wall of the U-shaped fixing frame 1 on the same side to facilitate contact with the corresponding end face of the forging.

[0034] It should be noted that the stud 72 cannot rotate due to the restriction of the clamping rod 73 , that is, the stud 72 can only move axially under the drive of the bidirectional threaded sleeve 71 .

[0035] As required, a rotating handle is provided in the middle of the bidirectional threaded sleeve 71, that is, the bidirectional threaded sleeve 71 can be rotated in a forward or reverse direction by rotating the handle.

[0036] This arrangement can realize the function of the clamping sleeve being arranged on the shaft forging of the horse rod 2 by rotating the bidirectional threaded sleeve 71, which drives the two studs 72 to move axially, and the studs 72 drive the corresponding clamping rods 73 to move axially, thereby realizing the function of the clamping sleeve being arranged on the shaft forging of the horse rod 2. Since the two clamping rods 73 move synchronously and in opposite directions, the forging can also be aligned.

[0037] Furthermore, a ball 74 is provided at the inner end of the clamping rod 73; this can reduce the friction between the clamping rod 73 and the forging when the horse rod 2 drives the forging to rotate.

[0038] It should be noted that: after the isosceles triangular ridge 5 is rolled to the tangent line, the ball 74 in the centering clamping device 7 can leave the end face of the forging. At this time, the interaction between the tangent line and the isosceles triangular ridge 5 can prevent the forging from moving axially.

[0039] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and it is intended that all changes that fall within the meaning and scope of equivalent elements are included in the present invention.

Claims

1. A material distribution device before profiling rolling expansion of the inner ring of an extra-large tapered roller bearing, characterized in that: The invention comprises a U-shaped fixing frame (1) and a material dividing plate (3), wherein a rotatable horse rod (2) is disposed across the top of the U-shaped fixing frame (1) so as to drive the forging sleeved on the rod body to rotate; an inverted isosceles trapezoidal punch (4) is disposed on the lower plate surface of the material dividing plate (3) corresponding to the middle part of the U-shaped fixing frame (1) in the horizontal direction, and two oblique side surfaces of the isosceles trapezoidal punch (4) are respectively directed toward two ends of the forging so as to press out a groove in the middle part of the rotating forging during the descending process, thereby realizing the function of symmetrically dividing the forging.

2. The feeding device before profiling ring rolling of the inner ring of an extra-large tapered roller bearing according to claim 1, characterized in that: An inverted isosceles triangular ridge (5) is provided in the transverse middle of the lower end surface of the isosceles trapezoidal punch (4) so as to facilitate pressing out a dividing line in the middle of the rotating forging.

3. The blank dividing device before profiling rolling of the inner ring of an extra-large tapered roller bearing according to claim 2, characterized in that: It also includes a positioning rod (6); a plurality of positioning holes (41) are provided at intervals along the longitudinal direction of the lower end surface of the isosceles trapezoidal punch (4) in the transverse middle portion thereof; a top surface of the isosceles triangular convex ridge (5) is provided with positioning columns (51) corresponding to the positioning holes (41); and the positioning rod (6) vertically penetrates the positioning holes (41) and the positioning columns (51) to facilitate fixing the positioning columns (51).

4. A blank dividing device before profiling ring rolling of the inner ring of an extra-large tapered roller bearing according to claim 3, characterized in that: A matching groove (42) extending longitudinally through the lower end surface of the isosceles trapezoidal punch (4) is provided in the transverse middle of the lower end surface, and the top of the isosceles triangular convex ridge (5) is matched and embedded in the groove cavity of the matching groove (42).

5. The feeding device before profiling rolling of the inner sleeve of an extra-large tapered roller bearing according to claim 1, characterized in that: The U-shaped fixing frame (1) is provided with a centering clamping device (7) for centering the forged rod body of the horse rod (2).

6. The material distribution device before profiling rolling of the inner sleeve of an extra-large tapered roller bearing according to claim 5, characterized in that: The centering clamping device (7) comprises a bidirectional threaded sleeve (71), both ends of the bidirectional threaded sleeve (71) are threadedly matched with studs (72), a section of the stud (72) away from the bidirectional threaded sleeve (71) slides through the corresponding side wall of the U-shaped fixing frame (1), and the end of the section of the stud (72) is fixedly connected to a clamping rod (73) spaced and parallel to the stud, and the inner end of the clamping rod (73) slides through the side wall of the U-shaped fixing frame (1) on the same side so as to abut against the corresponding end face of the forging.

7. A material distributing device before profiling ring rolling of the inner sleeve of an extra-large tapered roller bearing according to claim 6, characterized in that: A ball (74) is provided at the inner end of the clamping rod (73).

Images