CN111804855B - Three-freedom-degree rotary rolling machine - Google Patents

Three-freedom-degree rotary rolling machine Download PDF

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CN111804855B
CN111804855B CN202010867684.0A CN202010867684A CN111804855B CN 111804855 B CN111804855 B CN 111804855B CN 202010867684 A CN202010867684 A CN 202010867684A CN 111804855 B CN111804855 B CN 111804855B
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rack
rotary rolling
jackscrew
ring roller
rotary
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CN111804855A (en
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赵春江
许镱巍
李维壮
白峭峰
周梓朋
王琛
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Taiyuan University of Science and Technology
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21HMAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H1/00Making articles shaped as bodies of revolution
    • B21H1/18Making articles shaped as bodies of revolution cylinders, e.g. rolled transversely cross-rolling

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Abstract

The invention discloses a three-degree-of-freedom rotary rolling machine which comprises a rotary rolling roller assembly, a ring roller bracket for mounting the rotary rolling roller assembly, a frame for mounting the ring roller bracket, a baseplate seat spliced with the frame, a transmission assembly for providing power for the rotary rolling roller assembly and an adjusting assembly, wherein the ring roller bracket is arranged on the frame; two groups of arc-shaped sliding grooves are arranged on the inner side of the rack, and arc-shaped sliding blocks matched with the arc-shaped sliding grooves are arranged on the ring roller bracket; the adjusting mechanism comprises a pressing jackscrew, a ring roller bracket tensioning set, a feeding angle adjusting jackscrew and a rack rotating jackscrew; the invention provides a rotary rolling machine for a pipe-shaped workpiece with three degrees of freedom of screw-down, deflection angle and feed angle, through the gear meshing relationship of a transmission assembly, the central axis of a rotary rolling roller is vertical to the axis of a drive bevel gear, the rotary rolling roller and the drive bevel gear rotate coaxially to form a feed angle, meanwhile, a frame rotates around a bottom plate seat to form roller deflection, and the screw-down degree of freedom is obtained through translation of a ring roller support.

Description

Three-freedom-degree rotary rolling machine
Technical Field
The invention relates to the technical field of spinning and roll forming, in particular to a three-degree-of-freedom spin-rolling machine, and particularly relates to a tubular workpiece.
Background
Spinning and rolling are the main processes for modern processing of industrial pipes and cylindrical thin-walled parts. When the spinning roller and the mandrel axis are set at an alternating angle (feed angle), a skew rolling spinning method similar to the skew rolling method is performed. The skew rolling spinning process creates a tension that contributes to the axial flow of the metal, with a tendency to pull the blank through the spinning wheel and mandrel gap, reducing to some extent the build-up and expansion of the metal as well as the frictional resistance and residual stress of the workpiece. At present, most of the spinning-wheel spinning machines have freedom degrees of radial feeding (pressing down), but most of the spinning-rolling machining angles are fixed, or the machining angles are adjusted through the yaw angles of the spinning wheels, and the prior art does not have the spinning machines which have adjusting capabilities of pressing down, the yaw angles and the feeding angles at the same time.
Disclosure of Invention
The invention aims to provide a three-degree-of-freedom rotary rolling machine to solve the problems in the prior art, and provides a rotary rolling machine for a tubular workpiece, which has three degrees of freedom including a pressing angle, a deflection angle and a feeding angle.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a three-degree-of-freedom rotary rolling machine which comprises a rotary rolling roller assembly, a ring roller bracket for mounting the rotary rolling roller assembly, a frame for mounting the ring roller bracket, a baseplate seat spliced with the frame, a transmission assembly for providing power for the roller assembly and an adjusting assembly, wherein the ring roller bracket is fixedly connected with the frame; the inner side of the frame is provided with an arc-shaped sliding groove, and the ring roller support is provided with an arc-shaped sliding block matched with the arc-shaped sliding groove.
The adjusting mechanism comprises a pressing jackscrew, a ring roller bracket tensioning set, a feeding angle adjusting jackscrew and a rack rotating jackscrew; the screw-down jackscrew penetrates through the rack and is in contact with the ring roller bracket, and the screw-down jackscrew is in threaded connection with the rack; the ring roller support is fixedly connected with the rack through a feed angle adjusting jackscrew, and the feed angle adjusting jackscrew is in threaded connection with the rack; the rack rotating jackscrew penetrates through the bottom plate seat to be abutted against the rack, and the rack rotating jackscrew is in threaded connection with the bottom plate seat.
Preferably, the rotary rolling roller assembly comprises a rotary rolling roller and a rotary rolling roller shaft fixedly connected with the rotary rolling roller, and two ends of the rotary rolling roller shaft are connected with the ring roller support through bearings.
Preferably, the central point of bottom plate seat puts and is provided with the through-hole, be provided with in the frame with the boss of through-hole looks adaptation, the boss is cylindrical, the frame can be rotatory around the through-hole.
Preferably, the length of the arc-shaped sliding chute is greater than that of the arc-shaped sliding block.
Preferably, the ring roller support tensioning set is parallel to the pressing jackscrew, the ring roller support tensioning set comprises a pull rod and a tensioning spring, the pull rod penetrates through the rack and is fixedly connected with the ring roller support, and the tensioning spring is arranged between the rack and the head of the pull rod.
Preferably, the transmission assembly comprises a cylindrical gear fixedly connected with the rotary rolling roll shaft, an intermediate gear meshed with the cylindrical gear, a driven bevel gear shaft fixedly connected with the intermediate gear, a driving bevel gear shaft meshed with the driven bevel gear shaft, a motor for providing power and a coupling for connecting the driving bevel gear shaft and the motor; the cylindrical gear, the intermediate gear and the driven bevel gear shaft are arranged inside the ring roller support, and the driving bevel gear shaft is respectively connected with the ring roller support and the rack through bearings.
Preferably, the maximum revolution outer diameter of the spinning roller is larger than the maximum revolution outer diameter of the cylindrical gear.
The invention discloses the following technical effects: the invention provides a rotary rolling machine for a pipe-shaped workpiece with three degrees of freedom of screw-down, deflection angle and feed angle, through the gear meshing relationship of a transmission component, the central axis of the rotary rolling roller is vertical to the axis of a drive bevel gear, the rotary rolling roller and the drive bevel gear rotate coaxially to form feed angle adjustment, meanwhile, a frame rotates around a bottom plate seat to form roller deflection adjustment, and the screw-down degree of freedom is obtained through translation of a ring roller bracket. Meanwhile, the spatial layout problem of the transmission scheme is solved, so that the mechanism layout of the rotary rolling mill is compact, the space is saved, and the adjustment principle is ingenious and reasonable.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic view of the construction of a spin-rolling mill according to the present invention;
FIG. 2 is a cross-sectional view of the spin mill of the present invention;
FIG. 3 is a front view of the structure of the spin-rolling mill of the present invention;
FIG. 4 is a cross-sectional view taken along line B-B of FIG. 2 in accordance with the present invention;
FIG. 5 is a schematic view of the transmission assembly of the present invention;
FIG. 6 is a schematic structural view of a double-rotation rolling mill;
FIG. 7 is a schematic structural view of a triple-rotation rolling mill.
Wherein, 1 is a spin-rolling roller assembly, 1.1 is a spin-rolling roller, 1.2 is a spin-rolling roller shaft, 2 is a frame, 2.6 is a boss, 2.8 is an arc chute, 3 is a bottom plate seat, 3.1 is a through hole, 4 is a ring roller support, 4.8 is an arc slider, 5 is a transmission assembly, 5.1 is a cylindrical gear, 5.2 intermediate gears, 5.3 is a driven bevel gear shaft, 5.4 is a driving bevel gear shaft, 5.5 is a shaft coupling, 5.6 is a motor, 6 is a pressing jackscrew, 7 is a ring roller support tightening set, 7.1 is a pull rod, 7.2 is a tightening spring, 8 is a feeding angle adjusting jackscrew, 9 is a frame rotating jackscrew, 10 is a workpiece to be machined, and 11 is a core die.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
In the case of the example 1, the following examples are given,
referring to fig. 1 to 6, the present embodiment provides a three-degree-of-freedom spin mill, which includes a spin roll assembly 1, a ring roll holder 4 for mounting the spin roll assembly 1, a frame 2 for mounting the ring roll holder 4, a base plate seat 3 inserted into the frame 2, a transmission assembly 5 for providing power to the spin roll assembly 1, and an adjustment assembly.
The rotary rolling roller assembly 1 comprises a rotary rolling roller 1.1 and a rotary rolling roller shaft 1.2 fixedly connected with the rotary rolling roller 1.1, and two ends of the rotary rolling roller shaft 1.2 are connected with a ring roller bracket 4 through bearings; the rotary rolling roller 1.1 is arranged at the center of the rotary rolling roller shaft 1.2.
The central point of bottom plate seat 3 puts and is provided with through-hole 3.1, is provided with the boss 2.6 with through-hole 3.1 looks adaptation on the frame 2, and boss 2.6 is cylindrical, and frame 2 can be around through-hole 3.1 and boss 2.6 rotatory. 2 inboard frames are provided with the arc spout 2.8 that two sets of symmetries set up, are provided with the arc slider 4.8 with arc spout 2.8 looks adaptation on the ring roller support 4, and the length of arc spout 2.8 is greater than the length of arc slider 4.8, arc spout 2.8 and arc slider 4.8 are located same centre of gyration's the circular arc cylinder, and the center of this circular arc cylinder and the central axis of drive bevel gear axle 5.4, the centre of gyration line of the roller 1.1 of rolling soon are on same straight line, and arc slider 4.8 and arc spout 2.8 both can produce the ascending displacement of length direction promptly, also can produce relative rotation.
The transmission assembly 5 comprises a cylindrical gear 5.1 fixedly connected with a rotary rolling roll shaft 1.2, an intermediate gear 5.2 meshed with the cylindrical gear 5.1, a driven bevel gear shaft 5.3 fixedly connected with the intermediate gear 5.2, a driving bevel gear shaft 5.4 meshed with the driven bevel gear shaft 5.3, a motor 5.6 for providing power and a coupler 5.5 for connecting the driving bevel gear shaft 5.4 and the motor 5.6; cylindrical gear 5.1, intermediate gear 5.2 and driven bevel gear axle 5.3 set up inside ring roller support 4, and initiative bevel gear axle 5.4 passes through the bearing and is connected with ring roller support 4, frame 2 respectively.
The maximum rotary outer diameter of the rotary roller 1.1 is larger than that of the cylindrical gear 5.1, so that the rotary roller has enough radial space to meet the setting of the rolling reduction; meanwhile, the invention adopts a method that the cylindrical gear coaxial with the rotary rolling roller is connected with the driving bevel gear and the driven bevel gear by the intermediate gear, and the driven gear integrally rotates around the driving gear, and combines the swing of the rotary rolling roller bracket and the engagement of the driving gear and the driven gear together, thereby solving the space layout problem of a transmission scheme, leading the mechanism layout of the rotary rolling machine to be compact, saving the space and having skillful and reasonable adjustment principle.
The adjusting mechanism comprises a pressing jackscrew 6, a ring roller bracket tensioning set 7, a feeding angle adjusting jackscrew 8 and a rack rotating jackscrew 9. The screw 6 sets up in the one side of keeping away from the roller 1.1 soon, and screw 6 runs through frame 2 and offsets with ring roller support 4 under the pressure, presses screw 6 and 2 threaded connection of frame, presses screw 6 to be provided with two sets ofly, and two sets of screws 6 that press are in order to roll 1.1 symmetry setting soon. The ring roller support 4 is fixedly connected with the frame 2 through a feeding angle adjusting jackscrew 8, the feeding angle adjusting jackscrew 8 is in threaded connection with the frame 2, the feeding angle adjusting jackscrew 8 is arranged on two sides of the frame 2 and is symmetrically designed, and two feeding angle adjusting jackscrews 8 which are vertically symmetrical are arranged on each side. The frame rotary jackscrew 9 passes bottom plate seat 3 and is inconsistent with frame 2, and frame rotary jackscrew 9 and bottom plate seat 3 threaded connection, frame rotary jackscrew 9 are provided with two sets ofly, arrange respectively on the diagonal of bottom plate seat 3. The ring roller support tensioning group 7 is arranged in parallel with the pressing jackscrew 6, the ring roller support tensioning group 7 comprises a pull rod 7.1 and a tensioning spring 7.2, the pull rod 7.1 penetrates through the rack 2 to be fixedly connected with the ring roller support 4, and the tensioning spring 7.2 is arranged between the rack 2 and the head of the pull rod 7.1.
To process the blank size
Figure BDA0002650207870000061
The seamless steel pipe of (3) is taken as an example, and the equipment structure is adjusted to meet the processing requirements. The blank size of the workpiece 10 to be processed is: outer diameter
Figure BDA0002650207870000062
The wall thickness is 3.5 mm; size of the core mold 11: inner diameter
Figure BDA0002650207870000063
The inner surface of the workpiece 10 is sleeved on the outer surface of the core mold 11. The axial lines of the workpiece to be machined 10 and the core die 11 are parallel to the central axis of the spin-rolling roller shaft 1.2, and the workpiece to be machined 10 and the core die 11 are arranged outside the spin-rolling roller 1.1.
The specific adjustment process is as follows:
adjusting the feed angle β: the feeding angle adjusting jackscrew 8 runs to enable the ring roller support 4 and the ring roller component 1 to rotate around the axis of the driving bevel gear shaft 5.4, meanwhile, the driven bevel gear shaft 5.3 integrally rotates around the axis of the driving bevel gear shaft 5.4 while not changing the meshing relation with the driving bevel gear shaft 5.4, and as the arc-shaped sliding groove 2.8 and the arc-shaped sliding block 4.8 are positioned on the arc-shaped cylindrical surface of the same rotation center, the arc-shaped sliding block 4.8 on the outer side of the ring roller support 4 rotates along the arc-shaped sliding groove 2.8 on the inner side of the rack 2, so that the purpose of adjusting the feeding angle is achieved, and the adjusting feeding angle beta is 0.5 degrees.
Adjusting a yaw angle gamma: the frame rotating jackscrew 9 runs to push the frame 2 to rotate around the axis of the boss 2.6 in the through hole 3.1 to form a deflection angle gamma of 10 degrees for changing the rolling technological parameters such as the rolling reduction and the contact angle of the rolling roller 1.1 and the workpiece to be machined 10.
Adjusting the reduction amount delta t: adjusting a side-pushing lower top screw 6, pushing a roller support 4 to move towards a to-be-machined part 10, enabling an arc-shaped sliding block 4.8 to slide along an arc-shaped sliding groove 2.8 on the inner side of a rack 2, enabling the outer surface of a rotary roller 1.1 to be in contact with the outer surface of a blank of the to-be-machined part 10, determining a base point for adjusting the thinning amount, withdrawing the to-be-machined part 10, enabling the side-pushing lower top screw 6 to run, pushing a ring roller support 4 to continue to move towards the to-be-machined part 10, repeating the motion process of the ring roller support 4 to enable the base point to move towards the to-be-machined part 10 and adjust the thinning amount, and enabling the thinning amount delta t to be 1.5mm after adjustment.
The transmission component 5 runs, and the motor 5.6 is arranged on the frame 2; when the motor 5.6 operates, the driving bevel gear shaft 5.4 is driven to rotate through the coupler 5.5, the driven bevel gear shaft 5.3 is driven to rotate, the driven bevel gear shaft 5.3 drives the middle cylindrical gear 5.2 to coaxially rotate, and the cylindrical gear 5.1 and the rotary rolling roller assembly 1 on the cylindrical gear are driven to rotate. The input rotation speed n of the motor is 800rpm, the reduction ratio i of the bevel gear is 2, and the output rotation speed n' of the ring roller is 400 rpm. The workpiece 10 to be machined is fed at a constant speed, the feeding speed v is 2mm/s, and the workpiece 10 to be machined is uniformly machined under the rotation of the rotary rolling roller 1.1.
When the rotary rolling mill group is a double-rotary rolling mill, two groups of rotary rolling mills are symmetrically arranged on different sides, as shown in fig. 6, two groups of rotary rolling rolls 1.1 are respectively arranged on two sides of the axis of the workpiece 10 to be processed and are parallel and positioned in the same horizontal plane; the feeding angle beta and the deflection angle gamma are the same in the adjusting process of the two groups of rotary rolling mills, and the rotating directions of the rollers are the same.
The two groups of rotary rollers 1.1 are adjusted in the thinning amount according to the following two conditions:
firstly, the thinning amount delta t is adjusted to be the same, the workpiece 10 to be processed is axially fed, and the tracks of the two groups of rotating rollers 1.1 on the surface of the workpiece 10 to be processed are not overlapped and are adjacent.
Secondly, the thinning amount delta t is different, the primary thinning amount delta t1 is 0.9mm, the delta t2 is 0.6mm, the workpiece 10 to be machined is axially fed, and the two groups of rotating rollers 1.1 are overlapped on the surface track of the workpiece 10 to be machined.
Example 2
Referring to fig. 7, the present embodiment provides a three-degree-of-freedom spin-rolling mill, and the present embodiment differs from embodiment 1 only in that: the embodiment discloses that when the spin-rolling mill group is a three-spin rolling mill, three groups of spin-rolling mills are uniformly arranged in the circumferential direction, as shown in fig. 7; the three groups of rotary rollers 1.1 are uniformly distributed by taking the central axis of the workpiece to be machined 10 as an axis and are positioned at the same axial position; the feeding angle beta and the deflection angle gamma are the same in the adjustment process of the three groups of rotary rolling mills, and the rotation directions of the rollers are the same.
Firstly, the thinning amount delta t is adjusted to be the same, the workpiece 10 to be processed is fed along the axial direction, and the tracks of the three groups of rotating rollers 1.1 on the surface of the workpiece 10 to be processed are not overlapped and are adjacent.
Secondly, the thinning amount Δ t is different, the one-pass thinning amount Δ t1 is 0.8mm, the Δ t2 is 0.6mm, and the Δ t3 is 0.4mm, the blank of the workpiece 10 to be machined is axially fed, and the three groups of rotating rollers 1.1 are overlapped on the surface track of the workpiece 10 to be machined.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.

Claims (3)

1. A three-freedom-degree rotary rolling machine is characterized in that: the rotary rolling device comprises a rotary rolling roller assembly (1), a ring roller bracket (4) for mounting the rotary rolling roller assembly (1), a frame (2) for mounting the ring roller bracket (4), a bottom plate seat (3) spliced with the frame (2), a transmission assembly (5) for providing power for the rotary rolling roller assembly (1) and an adjusting assembly; two groups of arc-shaped sliding grooves (2.8) are formed in the inner side of the rack (2), and arc-shaped sliding blocks (4.8) matched with the arc-shaped sliding grooves (2.8) are arranged on the ring roller bracket (4); the rotary rolling roller assembly (1) comprises a rotary rolling roller (1.1) and a rotary rolling roller shaft (1.2) fixedly connected with the rotary rolling roller (1.1), and two ends of the rotary rolling roller shaft (1.2) are connected with the ring roller bracket (4) through bearings;
the adjusting assembly comprises a pressing jackscrew (6), a ring roller bracket tensioning set (7), a feeding angle adjusting jackscrew (8) and a rack rotating jackscrew (9); the pressing jackscrew (6) penetrates through the rack (2) to be in contact with the ring roller support (4), and the pressing jackscrew (6) is in threaded connection with the rack (2); the ring roller support (4) is fixedly connected with the rack (2) through a feed angle adjusting jackscrew (8), and the feed angle adjusting jackscrew (8) is in threaded connection with the rack (2); the rack rotating jackscrew (9) penetrates through the bottom plate seat (3) to be abutted against the rack (2), and the rack rotating jackscrew (9) is in threaded connection with the bottom plate seat (3);
a through hole (3.1) is formed in the center of the bottom plate seat (3), a boss (2.6) matched with the through hole (3.1) is arranged on the rack (2), the boss (2.6) is cylindrical, and the rack (2) can rotate around the through hole (3.1); the ring roller support tensioning group (7) is arranged in parallel with the pressing jackscrew (6), the ring roller support tensioning group (7) comprises a pull rod (7.1) and a tensioning spring (7.2), the pull rod (7.1) penetrates through the rack (2) and is fixedly connected with the ring roller support (4), and the tensioning spring (7.2) is arranged between the rack (2) and the head of the pull rod (7.1);
the transmission assembly (5) comprises a cylindrical gear (5.1) fixedly connected with the rotary rolling roll shaft (1.2), an intermediate gear (5.2) meshed with the cylindrical gear (5.1), a driven bevel gear shaft (5.3) fixedly connected with the intermediate gear (5.2), a driving bevel gear shaft (5.4) meshed with the driven bevel gear shaft (5.3), a motor (5.6) for providing power and a coupler (5.5) for connecting the driving bevel gear shaft (5.4) and the motor (5.6); the cylindrical gear (5.1), the intermediate gear (5.2) and the driven bevel gear shaft (5.3) are arranged inside the ring roller support (4), and the driving bevel gear shaft (5.4) is connected with the ring roller support (4) and the rack (2) through bearings respectively.
2. The three-degree-of-freedom spin-rolling mill according to claim 1, characterized in that: the length of the arc-shaped sliding groove (2.8) is greater than that of the arc-shaped sliding block (4.8).
3. The three-degree-of-freedom spin-rolling mill according to claim 1, characterized in that: the maximum rotary outer diameter of the rotary roller (1.1) is larger than that of the cylindrical gear (5.1).
CN202010867684.0A 2020-08-26 2020-08-26 Three-freedom-degree rotary rolling machine Active CN111804855B (en)

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CN85106451B (en) * 1985-08-28 1987-04-08 高建民 Large-diameter and extra-large-diameter seamless steel pipe rolling mill
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