CN111618222A

CN111618222A - Integral joint bearing precision forging forming device with flange and forming method thereof

Info

Publication number: CN111618222A
Application number: CN202010502577.8A
Authority: CN
Inventors: 王兆昌; 刘文水; 林瑞宗; 洪艳平
Original assignee: Fujian Longxi Bearing Group Co Ltd
Current assignee: Fujian Longxi Bearing Group Co Ltd
Priority date: 2020-06-04
Filing date: 2020-06-04
Publication date: 2020-09-04

Abstract

The invention discloses a precision forging forming device and a forming method for an integral joint bearing with a flange, wherein an outer ring blank of the joint bearing is formed close to an inner circle part of the flange; a flange of an outer ring of the joint bearing can be arranged on the clamping and rotating tool, an inner ring of the joint bearing can be sleeved in the outer ring blank, and the clamping and rotating tool clamps the outer ring and the inner ring of the joint bearing to rotate; the forging hammers are circumferentially distributed outside the clamping and rotating tool and are respectively aligned to the outer ring blank of the joint bearing, and the outer ring blank of the joint bearing can be rotated to perform reciprocating forging hammer to generate deformation.

Description

Integral joint bearing precision forging forming device with flange and forming method thereof

Technical Field

The invention relates to the field of joint bearing manufacturing, in particular to a precision forging forming device and a precision forging forming method for an integral joint bearing with a flange.

Background

At present, a large amount of integral joint bearings are used in aviation, advanced rail transit, new energy equipment and heavy-duty automobiles, and have the characteristics of strong bearing capacity, good running stability, high reliability, long service life and the like. Along with the increasingly complicated operating mode of bearing application, many positions bear very big axial load, consequently need the bearing to take the flange, improve axial bearing capacity, simultaneously easy to assemble.

The traditional integral joint bearing is formed by pressing an outer ring by a die, the inner ring is processed into a finished product size by the method, the diameter of an outer ring blank and an inner hole cylindrical diameter is slightly larger than the diameter of an inner ring ball, the outer ring blank is extruded, and the outer ring blank is gradually pressed along the radial direction until an upper die and a lower die are assembled. When the bearing is used for a bearing with a flange, a single-side compression method can be adopted. This extrusion method of the oscillating bearing has the following disadvantages:

(1) the extrusion force generated by the mould compression molding method is large, and the oil groove and the oil hole of the outer ring can be damaged or the self-lubricating gasket can be damaged in the extrusion process.

(2) The bearing with a large wrap angle is easy to be unstable when being compressed, so that the ovality of a cavity after molding is overlarge, the coupling precision of the inner spherical surface and the outer spherical surface is not easy to control, and the bearing cannot rotate flexibly.

(3) As shown in fig. 1, the wall thickness of the outer ring blank 1' is designed to be relatively large to prevent the coupling accuracy of the inner and outer spherical surfaces on the non-compression side from being damaged, which results in large allowance for subsequent processing after compression, and damage to the forming accuracy and the play value after stress release.

(4) The sealing groove structure cannot be prepared by the conventional die compression molding method.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a precision forging forming device and a precision forging forming method for an integral joint bearing with a flange.

The first technical scheme adopted by the invention for solving the technical problems is as follows:

a precision forging forming device for an integral joint bearing with a flange is characterized in that an outer ring blank of the joint bearing is formed close to an inner circle part of the flange, and the device comprises a clamping and rotating tool and a plurality of forging hammers; the flange of the outer ring blank of the joint bearing can be arranged on the clamping and rotating tool, the inner ring of the joint bearing can be sleeved in the outer ring blank, and the clamping and rotating tool clamps the outer ring blank and the inner ring of the joint bearing to rotate; the forging hammers are circumferentially distributed outside the clamping and rotating tool and are respectively aligned to the outer ring blank of the joint bearing, and the outer ring blank of the joint bearing can be rotated to perform reciprocating forging hammer to generate deformation.

Preferably, the unformed portion of the outer race blank of the spherical plain bearing projects outwardly.

Preferably, the clamping and rotating tool comprises a first driving shaft and a first driven shaft, a flange installation part is arranged on the first driving shaft, an inner ring of the joint bearing can be sleeved on the first driving shaft and located in an outer ring blank of the joint bearing, and a shaft sleeve is arranged on the first driven shaft and can be sleeved on the first driving shaft and abut against the inner ring of the joint bearing.

Preferably, the end of the shaft sleeve of the first driven shaft comprises an inner ring end surface abutting surface and a ring groove forming portion, the inner ring end surface abutting surface can abut against the inner ring of the joint bearing, and the ring groove forming portion can extend into a space between an inner ring blank and an outer ring blank of the joint bearing.

Preferably, the clamping and rotating device comprises a second driving shaft and a second driven shaft, a flange installation part is arranged on the second driving shaft, and an inner ring of the joint bearing can be sleeved on the second driven shaft and extends into an outer ring blank of the joint bearing fixed on the second driving shaft.

Preferably, the second driven shaft comprises a support shaft and a sealing ring abutting ring, the inner ring of the joint bearing is sleeved on the support shaft, and the sealing ring abutting ring abuts against the outer ball of the inner ring.

The second technical scheme adopted by the invention for solving the technical problems is as follows:

a precision forging method for an integral joint bearing with a flange is characterized in that an outer ring blank of the joint bearing is shaped close to an inner circle part of the flange, an inner ring of the joint bearing is sleeved into the outer ring blank and is fixed relatively, and a plurality of forging hammers are used for carrying out reciprocating hammer forging on the outer ring blank rotating in the radial direction to generate deformation.

Preferably, the outer ring blank of the joint bearing is provided with an oil groove and/or an oil hole.

The invention has the beneficial effects that:

(1) the bearing outer ring is slightly deformed by adopting the precisely controlled forging pressure (the forging strength is less than 400Mpa and is obviously less than the extrusion deformation strength), and the forging forming is realized through multiple times of forging superposition.

(2) The precision is controlled by adopting a clamping rotary tool, the center positioning and limiting precision of the inner ring and the outer ring is ensured, and the symmetry of the inner ring and the outer ring after the bearing is formed is improved.

(3) Through the control deformation area and the multiple micro-deformation accumulation molding, the damage to the outer ring oil groove or the self-lubricating liner can be reduced, and the damage to the spherical coupling precision of the inner ring and the outer ring on the non-deformation side can be avoided.

(4) The forging hammer die can be used for multiple types of products, a die cavity with reasonable design is arranged according to the stroke of the forging hammer of the device, and reasonable single radial and axial micro forging is set through programming, so that the outer ring of the product is formed in an accumulated mode through high-frequency micro deformation, the peak value of residual stress is reduced, stress concentration is reduced, the distribution of stress of the outer ring is balanced, and the spherical coupling precision is guaranteed.

(5) For the bearing with the sealing groove, the sealing groove is formed in the outer ring blank, a proper sealing groove core mold is designed, and the sealing groove can be precisely machined at one time during precision forging.

The invention is further explained in detail with the accompanying drawings and the embodiments; however, the precision forging apparatus for a flanged monolithic spherical plain bearing and the method for forming the same according to the present invention are not limited to the examples.

Drawings

Fig. 1 is a schematic structural view of a conventional extruded outer ring blank.

Fig. 2 is a schematic structural view of an outer ring blank subjected to finish forging by the finish forging apparatus of the present invention.

FIG. 3 is a schematic diagram of the four-hammer radial precision forging machine of the precision forging apparatus of the present invention.

FIG. 4 is a schematic structural diagram of a first embodiment of the present invention, wherein the inner and outer races of the bearing are assembled, and the first driven shaft is not yet sleeved on the first driving shaft.

Fig. 5 is a schematic structural diagram of the first embodiment of the invention, wherein the feeding is completed, and the first driven shaft is sleeved on the first driving shaft.

Fig. 6 is a schematic structural view after the finish forging according to an embodiment of the present invention.

Fig. 7 is a schematic diagram showing a modification of the outer ring material according to the first embodiment of the present invention.

Fig. 8 is a structural schematic view of the second embodiment of the invention, wherein the second driven shaft and the inner ring are not yet nested in the outer ring blank.

Fig. 9 is a structural schematic view of the second embodiment of the invention, wherein the second driven shaft and the inner ring are sleeved in the outer ring blank.

Fig. 10 is a schematic structural view after the finish forging of the second embodiment of the present invention.

Detailed Description

As shown in figure 2, the inner circle part close to the flange of the outer ring blank 1 of the integral joint bearing with the flange is shaped, the unformed part protrudes outwards in the radial direction, and according to the requirement, the clearance, the oil groove and/or the oil hole are/is increased when the inner cavity of the lubricating outer ring is designed, and the sealing groove design is added to the bearing outer ring accessory with the sealing ring. The four-hammer radial precision forging machine adopts a four-hammer radial precision forging machine, the structure of the four-hammer radial precision forging machine is shown in figure 3, the four-hammer radial precision forging machine comprises four forging hammers 2 which are distributed circumferentially and can respectively perform reciprocating radial motion of high-frequency pulses, and the specific working principle is as follows: the bearing (including the inner ring and the blank with the flange outer ring) rotates, and the four hammers 2 are subjected to high-frequency pulse reciprocating forging. The invention also adopts a rotary clamping tool to clamp the bearing.

Example one

Referring to fig. 4 to 6, the two end faces of the outer ring of the one-piece spherical plain bearing of the present embodiment are designed with two seal ring grooves 11, and the outer ring blank is formed adjacent to the inner circular portion of the flange and one of the seal ring grooves. After the bearing inner ring blank and the bearing outer ring blank are assembled, the bearing inner ring blank and the bearing outer ring blank are clamped by a tool as shown in the drawing, the rotary clamping tool comprises a first driving shaft 41 and a first driven shaft 42, a flange mounting part 411 is arranged on the first driving shaft 41, an inner ring 3 of a joint bearing of the outer ring blank 1 can be sleeved on the first driving shaft 41 and is positioned in the outer ring blank 1 of the joint bearing, and the first driven shaft 42 is provided with a shaft sleeve which can be sleeved on the first driving shaft 41 and supports against the inner ring 3 of the joint bearing. The tail end of the shaft sleeve of the first driven shaft 42 comprises an inner ring end surface abutting surface 421 and a ring groove forming part 422, the inner ring end surface abutting surface 421 can abut against the inner ring 3 of the joint bearing, and the ring groove forming part 422 can extend into a space between the inner ring 3 and the outer ring blank 1 of the joint bearing.

In the embodiment, the shaft and the inner ring are in clearance fit; the first driven shaft 42 is controlled by the equipment to move in and against the inner ring, as shown in fig. 5, so that the axial center positioning and limiting of the inner ring and the outer ring are realized.

The first driving shaft 41 drives the workpiece to rotate, the first driven shaft 42 rotates simultaneously, the forging hammer head 2 is in contact with a deformation area, the shape of the deformation area is controlled according to the principle that the volume is not changed before and after deformation, as shown in fig. 7, part A is in a shape before deformation, and part B is in a shape after deformation. The forged bearing blank is shaped as in figure 6 with two seal ring grooves 11.

After the processing is finished, the first driving shaft 41 retracts to the blanking area, the bearing is taken out from the outer diameter of the clamping outer ring, and the processing is finished.

Example two

Referring to fig. 8 to 10, both end faces of the outer ring of the one-piece-type spherical plain bearing of the present embodiment are designed with two seal ring grooves 11' into which one of the seal rings 5 has been previously inserted, and the inner circular portion of the outer ring blank adjacent to the flange and one of the seal ring grooves have been formed. The rotary clamping tool comprises a second driving shaft 71 and a second driven shaft 72, wherein a flange mounting part 711 is arranged on the second driving shaft 71, and an inner ring 3 'of a joint bearing can be sleeved on the second driven shaft 72 and extends into an outer ring blank 1' of the joint bearing fixed on the second driving shaft 71. The second driven shaft 72 includes a support shaft 721 and a seal ring abutting ring 722, an inner ring 3 'of the joint bearing is sleeved on the support shaft 721, and the seal ring abutting ring 722 abuts the seal ring 8 against an outer ball of the inner ring 3'.

In this embodiment, the shaft 72 is in clearance fit with the inner ring 3', and the second driven shaft 72 is simultaneously sleeved with the elastomer sealing ring 8; the outer race blank 1' is fitted on the second driveshaft 71 as shown in fig. 9, thereby achieving the axial centering and spacing of the inner and outer races.

The second driving shaft 71 drives the workpiece to rotate, the second driven shaft 72 simultaneously rotates, and the forging head 2 contacts with the deformation zone, as shown in fig. 10. The forged bearing blank is shaped as shown in figure 10.

After the processing is finished, the second driving shaft 72 retracts to the blanking area, the rotary clamping tool is separated from the first driving shaft 71, and the processing is finished.

The above embodiments are only used to further illustrate the precision forging forming device and the forming method of the flanged monolithic oscillating bearing of the present invention, but the present invention is not limited to the embodiments, and any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention fall within the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a take whole type joint bearing finish forge forming device of flange which characterized in that: the outer ring blank of the joint bearing is formed close to the inner circle part of the flange, and the device comprises a clamping rotating tool and a plurality of forging hammers; the flange of the outer ring blank of the joint bearing can be arranged on the clamping and rotating tool, the inner ring of the joint bearing can be sleeved in the outer ring blank, and the clamping and rotating tool clamps the outer ring blank and the inner ring of the joint bearing to rotate; the forging hammers are circumferentially distributed outside the clamping and rotating tool and are respectively aligned to the outer ring blank of the joint bearing, and the outer ring blank of the joint bearing can be rotated to perform reciprocating forging hammer to generate deformation.

2. The finish forging forming device for the flanged integral oscillating bearing according to claim 1, wherein: the unformed part of the outer ring blank of the knuckle bearing protrudes outward.

3. The finish forging forming device for the flanged integral oscillating bearing according to claim 1, wherein: the clamping rotary tool comprises a first driving shaft and a first driven shaft, wherein a flange mounting part is arranged on the first driving shaft, an inner ring of a joint bearing can be sleeved on the first driving shaft and located in an outer ring blank of the joint bearing, and a shaft sleeve is arranged on the first driven shaft and can be sleeved into the first driving shaft and abut against the inner ring of the joint bearing.

4. The finish forging forming device for the flanged integral oscillating bearing according to claim 3, wherein: the tail end of the shaft sleeve of the first driven shaft comprises an inner ring end face abutting surface and a ring groove forming portion, the inner ring end face abutting surface can abut against the inner ring of the joint bearing, and the ring groove forming portion can extend into a space between an inner ring blank and an outer ring blank of the joint bearing.

5. The flanged integral shopping bearing finish forging forming device is characterized in that: the clamping and rotating device comprises a second driving shaft and a second driven shaft, a flange installation part is arranged on the second driving shaft, and an inner ring of the joint bearing can be sleeved on the second driven shaft and extends into an outer ring blank of the joint bearing fixed on the second driving shaft.

6. The flanged integral shopping bearing finish forging forming device is characterized in that: the second driven shaft comprises a support shaft and a sealing ring abutting ring, the inner ring of the joint bearing is sleeved on the support shaft, and the sealing ring abutting ring abuts against the outer ball of the inner ring.

7. A precision forging forming method for an integral joint bearing with a flange is characterized by comprising the following steps: the outer ring blank of the joint bearing is shaped close to the inner circle part of the flange, the inner ring of the joint bearing is sleeved into the outer ring blank and is relatively fixed, and the outer ring blank which rotates in the radial direction is subjected to reciprocating hammer forging by using a plurality of forging hammers to generate deformation.

8. The method of claim 7, wherein: an unformed portion of an outer race blank of the spherical plain bearing projects radially outward.

9. The method of claim 7, wherein: and an oil groove and/or an oil hole are/is formed in an outer ring blank of the joint bearing.