CN215146374U

CN215146374U - Crankshaft fillet rolling device

Info

Publication number: CN215146374U
Application number: CN202120779464.2U
Authority: CN
Inventors: 朱光明; 丛建臣; 常征; 邵诗波; 王回航
Original assignee: Shandong University of Technology
Current assignee: Shandong University of Technology
Priority date: 2021-04-15
Filing date: 2021-04-15
Publication date: 2021-12-14
Anticipated expiration: 2031-04-15

Abstract

The utility model provides a crankshaft fillet rolling device, which relates to the technical field of crankshaft fillet rolling process and comprises a rolling head shell, a guide wheel mechanism, a driving mechanism and a transmission mechanism; the guide wheel mechanism is connected with the inner wall of the rolling head shell in a sliding manner; the driving mechanism is used for driving the transmission mechanism to move along the surface of the inclined plane in a first direction so as to enable the transmission mechanism to drive the guide wheel mechanism to move in a second direction; the first direction is the direction of perpendicular crankshaft journal, and the second direction is guide wheel mechanism's direction of feed, and guide wheel mechanism feeds in with the direction that is on a parallel with the crankshaft journal promptly, utilizes guide wheel mechanism to carry out the fillet roll extrusion to the junction of the journal of bent axle and crank arm, has avoided the roll extrusion process to appear protrudingly on the journal, has alleviated the crankshaft fillet roll extrusion in-process that exists among the prior art, appears protrudingly on the crankshaft journal, leads to the unable use of bent axle, still needs to carry out secondary abrasive machining's technical problem to the crankshaft journal.

Description

Crankshaft fillet rolling device

Technical Field

The utility model belongs to the technical field of bent axle fillet roll extrusion technology and specifically relates to a bent axle fillet rolling press device is related to.

Background

When the crankshaft is used, the crankshaft is mainly influenced by bending load and torsion load, the loads are alternating loads, and the alternating loads in the use process of the crankshaft can cause cracks on the surface of a fillet to cause fatigue failure at the position, so that the quality of the surface of the fillet at the joint of a journal and a crank arm needs to be improved to improve the fatigue strength; rolling the round corners of the crankshaft by using a round-head rolling wheel, forming textures on metal materials at the round corners under the action of pressure to obtain a work hardening effect, and introducing residual stress, so that the fatigue strength of the crankshaft is improved, and the surface quality of a rolling area is improved; the rolling wheel applies force to the crank shaft fillet, so that compressive stress is formed on the crank shaft fillet, and the fatigue strength of the crank shaft is improved.

As shown in fig. 1, in the prior art crankshaft fillet rolling process, the feeding direction of the rolling wheel is perpendicular to the crankshaft journal. However, when the rolling is performed in this way, the metal material at the fillet position is extruded by the rolling wheel and flows to the crankshaft journal, and is accumulated on the journal, so that an obvious protrusion appears on the crankshaft journal, and only after the crankshaft journal is ground again and the protrusion on the journal is removed, the crankshaft can be put into use.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a crankshaft fillet rolling press device to alleviate the crankshaft fillet rolling in-process that exists among the prior art, the metal material of fillet position receives rolling wheel extrusion can flow to the crankshaft journal, leads to appearing protruding on the crankshaft journal, leads to the unable use of bent axle, still needs to carry out secondary abrasive machining's technical problem to the crankshaft journal.

The utility model provides a pair of crankshaft fillet rolling press device, include: the rolling head comprises a rolling head shell, a guide wheel mechanism, a driving mechanism and a transmission mechanism;

the guide wheel mechanism, the driving mechanism and the transmission mechanism are positioned on the rolling head shell, and the guide wheel mechanism is connected with the inner wall of the rolling head shell in a sliding manner;

the driving mechanism is in transmission connection with the transmission mechanism, the transmission mechanism is in butt joint with the guide wheel mechanism through an inclined plane, the driving mechanism is used for driving the transmission mechanism to move along the surface of the inclined plane in a first direction, so that the transmission mechanism drives the guide wheel mechanism to move in a second direction, and the second direction is perpendicular to the first direction.

In a preferred embodiment of the present invention, the guide wheel mechanism includes a guide wheel housing, a rolling assembly and a rolling wheel;

the guide wheel shell is positioned in the rolling head shell, the guide wheel shell is connected with the inner wall of the rolling head shell in a sliding mode, and the guide wheel shell is abutted to the transmission mechanism through an inclined plane;

one end of the rolling wheel and the rolling assembly are positioned in the guide wheel shell, the rolling wheel is in meshed transmission connection with the rolling assembly, and the other end of the rolling wheel extends out of the guide wheel shell so as to roll and form the crankshaft.

In a preferred embodiment of the present invention, the rolling assembly includes a thrust bearing and a rotating portion;

the thrust bearing is located between the rotating part and the inclined plane of the guide wheel shell, the thrust bearing is abutted against the rotating part, and the rotating part is in meshed transmission connection with the rolling wheels located in the guide wheel shell.

In a preferred embodiment of the present invention, the rotating part includes a guide wheel shaft, a guide wheel, a needle bearing and a flange;

the guide wheel and the needle bearing are located in the guide wheel shell, one end of the guide wheel shaft penetrates through the guide wheel shell, the guide wheel shaft is fixed in the guide wheel shell through the flange plate, the thrust bearing and the needle bearing are arranged on the guide wheel shaft, the guide wheel is in transmission connection with the guide wheel shaft through the needle bearing, the thrust bearing is abutted to one side, close to the inclined plane of the guide wheel shell, of the guide wheel, and the guide wheel is in meshing connection with the rolling wheel.

In a preferred embodiment of the present invention, the rolling wheel and the guide wheel are disposed in an inclined manner, so that an included angle between the rolling wheel and a journal of the crankshaft is less than or equal to 30 °.

In a preferred embodiment of the present invention, the transmission mechanism includes a conical pushing block;

one end of the conical push block is connected with the driving mechanism, two guide wheel mechanisms are arranged, the two guide wheel mechanisms are symmetrically arranged relative to the conical push block, and the inclined surface of the guide wheel shell is matched and abutted with the inclined surface of the conical push block.

In a preferred embodiment of the present invention, the driving mechanism comprises a hydraulic driving mechanism;

the fixed end of the hydraulic driving mechanism is connected with the rolling head shell, and the driving end of the hydraulic driving mechanism penetrates through the rolling head shell to be connected with the bottom surface of the conical push block.

In the preferred embodiment of the present invention, the rolling head housing is provided with a storage tank, a slide rail is provided along the inner wall of the storage tank, and a slide groove for cooperating with the slide rail is provided on the guide wheel housing.

In the preferred embodiment of the present invention, the rolling pincer further comprises a rolling pincer body and a connecting mechanism;

the rolling clamp is characterized in that a positioning key is arranged on the rolling clamp body, a positioning groove matched with the positioning key is arranged on the rolling head shell, and the rolling head shell is connected with the rolling clamp body through the connecting mechanism.

In a preferred embodiment of the present invention, the connecting mechanism includes a pressing block and a fixing bolt;

the pressing block is positioned on one side, far away from the positioning groove, of the rolling head shell, the pressing block is abutted to the rolling clamp body and the rolling head shell respectively, and the fixing bolt penetrates through the pressing block to be connected with the rolling clamp body so as to fix the rolling head shell on the rolling clamp body through the pressing block.

The utility model provides a pair of crankshaft fillet rolling press device, include: the rolling head comprises a rolling head shell, a guide wheel mechanism, a driving mechanism and a transmission mechanism; the guide wheel mechanism, the driving mechanism and the transmission mechanism are positioned on the rolling head shell, and the guide wheel mechanism is connected with the inner wall of the rolling head shell in a sliding manner; the driving mechanism is in transmission connection with the transmission mechanism, the transmission mechanism is abutted against the guide wheel mechanism through an inclined plane, and the driving mechanism is used for driving the transmission mechanism to move along the surface of the inclined plane in a first direction so as to enable the transmission mechanism to drive the guide wheel mechanism to move in a second direction, and the second direction is perpendicular to the first direction; wherein the first direction is the direction of perpendicular bent axle journal, the second direction is guide pulley mechanism's direction of feed, guide pulley mechanism carries out the fillet roll extrusion with the direction that is on a parallel with the bent axle journal promptly, utilize guide pulley mechanism to carry out the fillet roll extrusion to the journal of bent axle and the junction of crank arm, it is protruding to have avoided the roll extrusion process to have appeared on the axle journal, the bent axle fillet roll extrusion in-process that exists among the prior art has been alleviated, the metal material of fillet position receives the rolling wheel extrusion can flow to the bent axle journal, lead to appearing protruding on the bent axle journal, lead to the unable use of bent axle, still need carry out secondary abrasive machining's technical problem to the bent axle journal.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram illustrating a prior art fillet rolling of a crankshaft;

fig. 2 is a schematic view of an overall structure of a crankshaft fillet rolling device according to an embodiment of the present invention;

fig. 3 is a schematic side view of a crankshaft fillet rolling device according to an embodiment of the present invention;

FIG. 4 is a schematic sectional view taken along the direction A-A of the crankshaft fillet rolling device provided in the embodiment of FIG. 3;

fig. 5 is the embodiment of the utility model provides a bent axle fillet rolling press carries out the rolling schematic structure of fillet to the bent axle.

Icon: 100-a crankshaft; 200-rolling head shell; 300-a guide wheel mechanism; 301-stator housing; 302-a rolling assembly; 312-a thrust bearing; 322-a guide wheel shaft; 332-a guide wheel; 342-needle bearings; 352-flange plate; 303-rolling wheels; 400-a drive mechanism; 500-a transmission mechanism; 600-rolling the pincer body; 700-a connection mechanism; 701-a compaction block; 702-fixing bolts.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 2 to 5, the present embodiment provides a crankshaft fillet rolling device, including: rolling head housing 200, guide wheel mechanism 300, drive mechanism 400 and transmission mechanism 500; the guide wheel mechanism 300, the driving mechanism 400 and the transmission mechanism 500 are positioned on the rolling head shell 200, and the guide wheel mechanism 300 is connected with the inner wall of the rolling head shell 200 in a sliding manner; drive mechanism 400 is connected with drive mechanism 500 in a transmission manner, and drive mechanism 500 and idler wheel mechanism 300 are in butt joint through the inclined plane, and drive mechanism 400 is used for driving drive mechanism 500 to move along the surface of inclined plane with first direction to make drive mechanism 500 drive idler wheel mechanism 300 to move with the second direction, and the second direction is perpendicular to the first direction.

It should be noted that the crankshaft fillet rolling device provided in this embodiment can perform fillet rolling on the joint of the journal and the crank arm of the crankshaft 100, wherein the crank arm is located at the end of the journal, the crank arm is in a convex structure relative to the journal, the rolling wheel 303 is arranged on the guide wheel mechanism 300, the driving mechanism 400 drives the transmission mechanism 500 to reciprocate in the direction perpendicular to the journal, the transmission mechanism 500 drives the guide wheel mechanism 300 to move in the direction parallel to the journal by using the inclined surface, that is, the feeding direction of the guide wheel mechanism 300 is perpendicular to the crank arm, when the rolling wheel 303 on the guide wheel mechanism 300 performs fillet rolling on the joint of the journal and the crank arm of the crankshaft 100, the metal in the pressed region flows to one side of the crank arm, a protrusion is generated on the crank arm, the journal is not affected, the generation of the protrusion at the journal position is avoided, and the secondary construction on the crankshaft 100 is reduced, the processing cost is saved.

The crankshaft fillet rolling device that this embodiment provided includes: rolling head housing 200, guide wheel mechanism 300, drive mechanism 400 and transmission mechanism 500; the guide wheel mechanism 300, the driving mechanism 400 and the transmission mechanism 500 are positioned on the rolling head shell 200, and the guide wheel mechanism 300 is connected with the inner wall of the rolling head shell 200 in a sliding manner; the driving mechanism 400 is in transmission connection with the transmission mechanism 500, the transmission mechanism 500 is in butt joint with the guide wheel mechanism 300 through an inclined plane, and the driving mechanism 400 is used for driving the transmission mechanism 500 to move along the surface of the inclined plane in a first direction so that the transmission mechanism 500 drives the guide wheel mechanism 300 to move in a second direction, wherein the second direction is perpendicular to the first direction; the first direction is a direction perpendicular to the journal of the crankshaft 100, and the second direction is a feeding direction of the guide wheel mechanism 300, namely the guide wheel mechanism 300 feeds in a direction parallel to the journal of the crankshaft 100, and the guide wheel mechanism 300 is used for performing fillet rolling on the joint of the journal of the crankshaft 100 and a crank arm, so that a protrusion on the journal in the rolling process is avoided, and the technical problems that in the fillet rolling process of the crankshaft 100 in the prior art, metal materials at fillet positions are extruded by the rolling wheels 303 and flow to the journal of the crankshaft 100, the protrusion occurs on the journal of the crankshaft 100, the crankshaft 100 cannot be used, and secondary grinding processing needs to be performed on the journal of the crankshaft 100 are solved.

Based on the above embodiments, further, in the preferred embodiment of the present invention, the guide wheel mechanism 300 includes a guide wheel housing 301, a rolling assembly 302 and a rolling wheel 303; the guide wheel housing 301 is positioned in the rolling head housing 200, the guide wheel housing 301 is connected with the inner wall of the rolling head housing 200 in a sliding manner, and the guide wheel housing 301 is abutted to the transmission mechanism 500 through an inclined surface; one end of the rolling wheel 303 and the rolling assembly 302 are positioned in the guide wheel housing 301, the rolling wheel 303 is in meshed transmission connection with the rolling assembly 302, and the other end of the rolling wheel 303 extends out of the guide wheel housing 301 to roll-form the crankshaft 100.

In this embodiment, the guide wheel housing 301 serves as a housing for the rolling assembly 302 and the rolling wheel 303, one end of the rolling wheel 303 is located in the guide wheel housing 301, the rolling wheel 303 is in transmission connection with the rolling assembly 302, and the rolling assembly 302 can drive the rolling wheel 303 to rotate; one side of the guide wheel housing 301, which is far away from the rolling wheel 303, is provided with an inclined surface, the transmission mechanism 500 abuts against the guide wheel housing 301 by using the inclined surface, and when the transmission mechanism 500 presses the guide wheel housing 301 by using the inclined surface to move towards one side of the rolling wheel 303, the rolling wheel 303 can roll the crankshaft 100 in a fillet manner; when the transmission mechanism 500 retracts, the rolling wheel 303 drives the guide wheel housing 301 to retract to the original position under the action of the crankshaft 100.

In the preferred embodiment of the present invention, the rolling assembly 302 includes a thrust bearing 312 and a rotating portion; thrust bearing 312 is located between the inclined plane of rotation portion and stator casing 301, and thrust bearing 312 and rotation portion butt, and rotation portion and the rolling wheel 303 meshing transmission that is located stator casing 301 are connected for guaranteeing that rolling wheel 303 can realize the rotation.

In the preferred embodiment of the present invention, the rotating part includes a guide wheel shaft 322, a guide wheel 332, a needle bearing 342 and a flange 352; the guide wheel 332 and the needle bearing 342 are positioned in the guide wheel housing 301, one end of the guide wheel shaft 322 penetrates through the guide wheel housing 301, the guide wheel shaft 322 is fixed in the guide wheel housing 301 through a flange 352, the thrust bearing 312 and the needle bearing 342 are arranged on the guide wheel shaft 322, the guide wheel 332 is in transmission connection with the guide wheel shaft 322 through the needle bearing 342, the thrust bearing 312 is abutted against one side, close to the inclined plane of the guide wheel housing 301, of the guide wheel 332, and the guide wheel 332 is in meshing connection with the rolling wheel 303.

In this embodiment, the guide wheel shaft 322 is used as a rotation output of the rolling wheel 303, the guide wheel shaft 322 is fixed in the guide wheel housing 301 by using a flange 352, and the needle bearing 342 and the thrust bearing 312 are respectively connected with the guide wheel shaft 322, wherein the guide wheel 332 is sleeved outside the needle bearing 342, the thrust bearing 312 is abutted against the side wall of the guide wheel 332, the guide wheel 332 and the rolling wheel 303 are in mutual meshing transmission, the rolling wheel 303 is rotatably connected with the guide wheel housing 301, and when the guide wheel shaft 322 rotates, the rolling wheel 303 is synchronously driven to rotate by using the guide wheel 332; when the transmission mechanism 500 presses the stator housing 301 by using the inclined surface, the thrust bearing 312 transmits the pressing force of the stator 332 and the rolling wheel 303 to the crankshaft 100; likewise, when the transmission 500 is returning, the roller 303 transmits the retracting pressing force to the roller housing 301 by means of the guide roller 332 and the thrust bearing 312.

In the preferred embodiment of the present invention, the rolling wheel 303 and the guide wheel 332 are disposed in an inclined manner, so that the included angle between the rolling wheel 303 and the journal of the crankshaft 100 is less than or equal to 30 °.

Preferably, the included angle between the rolling wheel 303 and the journal of the crankshaft 100 is 30 °, when the rolling wheel 303 acts between the journal and the crank arm of the crankshaft 100 at a smaller angle, the position of the rolling wheel 303 for rolling the fillet of the crankshaft 100 is close to the crank arm, and the position of the journal of the crankshaft 100 is more gentle at this time, so that the use of the crankshaft 100 can be better ensured; it should be noted that the included angle range between the rolling wheel 303 and the journal of the crankshaft 100 is required to ensure that fillet rolling is formed at both the journal and the crank arm positions of the crankshaft 100, and this is not limited herein.

In the preferred embodiment of the present invention, the transmission mechanism 500 comprises a conical pushing block; one end and the actuating mechanism 400 of toper ejector pad are connected, and guide wheel mechanism 300 is provided with two, and two guide wheel mechanisms 300 are symmetrical arrangement for the toper ejector pad, and the inclined plane of guide wheel casing 301 cooperates the butt with the inclined plane of toper ejector pad.

In the preferred embodiment of the present invention, the driving mechanism 400 includes a hydraulic driving mechanism 400; the fixed end of the hydraulic driving mechanism 400 is connected with the rolling head shell 200, and the driving end of the hydraulic driving mechanism 400 penetrates through the rolling head shell 200 and is connected with the bottom surface of the conical push block.

In this embodiment, the transmission mechanism 500 employs a tapered push block, that is, the tapered push block has a bottom surface with a large area, and is connected to the hydraulic driving mechanism 400, that is, an inclined surface between the two guide wheel mechanisms 300 is in an inverted cone shape, when the hydraulic driving mechanism 400 drives the tapered push block to extend, the two guide wheel mechanisms 300 move along a direction away from each other, and when the hydraulic driving mechanism 400 drives the tapered push block to retract, the two guide wheel mechanisms 300 move along a direction close to each other; the hydraulic driving mechanism 400 may adopt a hydraulic cylinder and a hydraulic oil pipe, and the conical push block is driven to reciprocate in the vertical direction by the hydraulic driving effect, which is not described herein again.

In the preferred embodiment of the present invention, the rolling head housing 200 is provided with a receiving groove, a slide rail is provided along the inner wall of the receiving groove, and a slide groove for cooperating with the slide rail is provided on the guide wheel housing 301.

Alternatively, the slide rail on the inner wall of the accommodating groove may be a T-shaped slide rail, the slide groove is also a T-shaped slide groove, the guide wheel housing 301 can be clamped inside the rolling head housing 200 by the cooperation of the slide rail and the slide groove, and when the transmission mechanism 500 presses the guide wheel housing 301, the guide wheel housing 301 can move along a path defined by the slide rail and the slide groove.

In the preferred embodiment of the present invention, the rolling pincer body 600 and the connecting mechanism 700 are further included; the rolling clamp body 600 is provided with a positioning key, the rolling head shell 200 is provided with a positioning groove matched with the positioning key, and the rolling head shell 200 is connected with the rolling clamp body 600 through the connecting mechanism 700.

In the preferred embodiment of the present invention, the connection mechanism 700 includes a pressing block 701 and a fixing bolt 702; the pressing block 701 is located on one side, far away from the positioning groove, of the rolling head shell 200, the pressing block 701 is abutted to the rolling clamp body 600 and the rolling head shell 200 respectively, and the fixing bolt 702 is connected with the rolling clamp body 600 through penetrating through the pressing block 701 so as to fix the rolling head shell 200 on the rolling clamp body 600 through the pressing block 701.

In this embodiment, the rolling head housing 200 is fixed to the rolling clamp body 600 by using a positioning key and a pressing block 701 on the rolling clamp body 600 and a fixing bolt 702, the rolling wheel 303 is arranged at a round angle of the crankshaft 100, a hydraulic cylinder is started to push a hydraulic push rod to move downwards, the hydraulic push rod pushes a conical push block to move downwards, the conical push block moves downwards to move two guide wheel housings 301 along a horizontal direction, the guide wheel housings 301 drive the rolling wheel 303 to move along the horizontal direction, and the two rolling wheels 303 tightly push crank arms on two sides of the crankshaft 100; and (3) starting the machine tool, driving the crankshaft 100 to rotate, applying force to the rolling wheel 303 along the horizontal direction to roll the fillet position, and enabling the metal in the pressed area to flow to one side of the crank arm to generate a bulge on the crank arm without influencing the journal.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A crankshaft fillet rolling device is characterized by comprising: the rolling head comprises a rolling head shell, a guide wheel mechanism, a driving mechanism and a transmission mechanism;

2. The crankshaft fillet rolling device according to claim 1, wherein the guide wheel mechanism comprises a guide wheel housing, a rolling assembly and a rolling wheel;

3. The crankshaft fillet rolling device according to claim 2, wherein the rolling assembly comprises a thrust bearing and a rotating part;

4. The crankshaft fillet rolling device according to claim 3, wherein the rotating part comprises a guide wheel shaft, a guide wheel, a needle bearing and a flange;

5. The crankshaft fillet rolling device according to claim 4, wherein the rolling wheel and the guide wheel are arranged in an inclined manner, so that the included angle between the rolling wheel and the journal of the crankshaft is less than or equal to 30 degrees.

6. The crankshaft fillet rolling device according to claim 2, wherein the transmission mechanism comprises a conical push block;

7. The crankshaft fillet rolling device according to claim 6, wherein said driving mechanism comprises a hydraulic driving mechanism;

8. The crankshaft fillet rolling device according to any one of claims 2 to 7, wherein the rolling head housing is provided with a receiving groove, a slide rail is arranged along the inner wall of the receiving groove, and the guide wheel housing is provided with a sliding groove for matching with the slide rail.

9. The crankshaft fillet rolling device according to claim 8, characterized by further comprising a rolling pincer body and a connecting mechanism;

10. The crankshaft fillet rolling device according to claim 9, wherein the connecting mechanism comprises a pressing block and a fixing bolt;