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

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

A three-degree-of-freedom spinning mill

technical field

The invention relates to the technical field of spinning and rolling, in particular to a three-degree-of-freedom spinning mill, in particular to a tubular workpiece.

Background technique

Spinning and rolling are the main processes for modern processing of industrial pipes and cylindrical thin-walled parts. When the axis of the rotary wheel and the mandrel is set at a staggered angle (feeding angle), it is similar to the skew rolling method in the skew rolling method. The cross-rolling spinning method will generate a tension that helps the metal to flow in the axial direction, and has the tendency to pull the blank through the gap between the rotary wheel and the mandrel, reducing the accumulation and diameter expansion of the metal, as well as frictional resistance and workpiece residual stress to some extent. . At present, most of the rotary rolling mills have the degree of freedom of radial feed (reduction), but most of the processing angles of the rotary rolling are fixed, or the processing angle is adjusted by the yaw angle of the rotary wheel. Spinning mill with adjustment capability of down, yaw angle and feed angle.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a three-degree-of-freedom spinning mill to solve the above-mentioned problems in the prior art. Spinning mill for workpieces.

For achieving the above object, the present invention provides the following scheme:

The present invention provides a three-degree-of-freedom spinning mill, which includes a spinning roll assembly, a ring roll support for installing the spinning roll assembly, a frame for installing the ring roll support, a bottom plate seat plugged with the frame, and a roll The components provide a power transmission component and an adjustment component; the inner side of the frame is provided with an arc-shaped chute, and the ring roller bracket is provided with an arc-shaped sliding block adapted to the arc-shaped chute.

The adjustment mechanism includes a pressing jack wire, a ring roller support tensioning group, a feeding angle adjustment jack wire and a frame rotating jack wire; The wire is threadedly connected to the frame; the ring roller support and the frame are fixedly connected by a feeding angle adjusting jack screw, and the feeding angle adjusting jack wire is threadedly connected to the frame; the frame rotating jack wire passes through the bottom plate seat In conflict with the frame, the frame rotating jack screw is threadedly connected with the base plate base.

Preferably, the spinning roll assembly includes a spinning roll and a spinning roll shaft fixedly connected to the spinning roll, and both ends of the spinning roll shaft are connected to the ring roll support through bearings.

Preferably, a through hole is provided at the center of the base plate, and a boss adapted to the through hole is provided on the frame, the boss is cylindrical, and the frame can rotate around the through hole.

Preferably, the length of the arc-shaped chute is greater than the length of the arc-shaped sliding block.

Preferably, the ring roller support tensioning group is arranged in parallel with the pressing top wire, the ring roller support tensioning group includes a tension rod and a tension spring, the tension rod is fixedly connected to the ring roller support through the frame, and the tension rod and the ring roller support are fixedly connected. A tension spring is arranged between the frame and the head of the tie rod.

Preferably, the transmission assembly includes a cylindrical gear fixedly connected with the rotating roller shaft, an intermediate gear meshed with the cylindrical gear, a driven bevel gear shaft fixedly connected with the intermediate gear, and a driving bevel gear meshed with the driven bevel gear shaft. A gear shaft, a motor that provides power, and a coupling connecting the drive bevel gear shaft and the motor; the spur gear, the intermediate gear and the driven bevel gear shaft are arranged inside the ring roller bracket, and the drive bevel gear shaft passes through a bearing They are respectively connected with the ring roller bracket and the frame.

Preferably, the maximum rotation outer diameter of the rotary roll is larger than the maximum rotation outer diameter of the cylindrical gear.

The present invention discloses the following technical effects: the present invention provides a rotary rolling mill for a tubular workpiece with three degrees of freedom of pressing, yaw angle and feeding angle at the same time. The axis is perpendicular to the axis of the drive bevel gear, the spin roller and the drive bevel gear rotate coaxially to form the feed angle adjustment, and the frame rotates around the base plate to form the roll yaw adjustment, and the degree of freedom of pressing is obtained through the translation of the ring roller bracket. The invention solves the technical problem that the spinning mill only has the function of reduction adjustment. At the same time, the space layout problem of the transmission scheme is solved, so that the mechanism layout of the spinning mill is compact, space-saving, and the adjustment principle is ingenious and reasonable.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some of the present invention. In the embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative labor.

Fig. 1 is the structure schematic diagram of the spinning mill of the present invention;

Fig. 2 is the sectional view of the spinning mill of the present invention;

Fig. 3 is the front view of the structure of the spinning mill of the present invention;

Fig. 4 is the B-B sectional view in Fig. 2 of the present invention;

5 is a schematic structural diagram of the transmission assembly of the present invention;

Fig. 6 is the structure schematic diagram of double spin mill;

FIG. 7 is a schematic diagram of the structure of a three-spin mill.

Among them, 1 is the rotating roller assembly, 1.1 is the rotating roller, 1.2 is the rotating roller shaft, 2 is the frame, 2.6 is the boss, 2.8 is the arc chute, 3 is the base plate, 3.1 is the through hole, and 4 is the ring roller Bracket, 4.8 is the arc slider, 5 is the transmission component, 5.1 is the cylindrical gear, 5.2 is the intermediate gear, 5.3 is the driven bevel gear shaft, 5.4 is the driving bevel gear shaft, 5.5 is the coupling, 5.6 is the motor, 6 is the Press down the top wire, 7 is the ring roller bracket tensioning group, 7.1 is the pull rod, 7.2 is the tension spring, 8 is the feeding angle adjustment top wire, 9 is the rack rotating top wire, 10 is the workpiece to be processed, and 11 is the core mold.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

Example 1,

1-6, the present embodiment provides a three-degree-of-freedom spinning mill, including a spinning roll assembly 1, a ring roll support 4 for installing the spinning roll assembly 1, a frame 2 for installing the ring roll support 4, and The base plate seat 3 to which the frame 2 is plugged, the transmission assembly 5 for providing power to the rotary roller assembly 1, and the adjustment assembly.

The spinning roller assembly 1 includes a spinning roller 1.1 and a spinning roller shaft 1.2 fixedly connected to the spinning roller 1.1. Both ends of the spinning roller shaft 1.2 are connected to the ring roll support 4 through bearings; the spinning roller 1.1 is arranged in the center of the spinning roller shaft 1.2 Location.

A through hole 3.1 is arranged at the center of the base plate base 3, and a boss 2.6 that matches the through hole 3.1 is arranged on the frame 2. The boss 2.6 is cylindrical, and the frame 2 can rotate around the through hole 3.1 and the boss 2.6. . The inner side of the frame 2 is provided with two sets of symmetrically arranged arc-shaped chute 2.8, the ring roller bracket 4 is provided with an arc-shaped sliding block 4.8 which is adapted to the arc-shaped chute 2.8, and the arc-shaped chute 2.8 is longer than the arc The length of the sliding block 4.8, the arc sliding groove 2.8 and the arc sliding block 4.8 are located on the circular arc cylindrical surface of the same center of rotation, and the center of the circular arc cylindrical surface is the center axis of the driving bevel gear shaft 5.4. The rotation center line of the roll 1.1 is on the same straight line, that is, the arc-shaped sliding block 4.8 and the arc-shaped chute 2.8 can produce both displacement in the longitudinal direction and relative rotation.

The transmission assembly 5 includes a cylindrical gear 5.1 fixedly connected with the rotating roller 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, and meshed with the driven bevel gear shaft 5.3 The driving bevel gear shaft 5.4, the motor 5.6 that provides power, and the coupling 5.5 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 bracket 4, The driving bevel gear shaft 5.4 is respectively connected with the ring roller support 4 and the frame 2 through bearings.

The maximum rotation outer diameter of the spinning roll 1.1 is larger than the maximum rotation outer diameter of the cylindrical gear 5.1, so that the spinning roll has enough radial space to meet the setting of the reduction; at the same time, the present invention adopts an intermediate gear to connect the cylindrical gear coaxial with the spinning roll. It is connected with the main and driven bevel gears, and the driven gear rotates around the driving gear as a whole, which combines the swing of the rotary roller support with the meshing relationship between the main and driven gears, thereby solving the problem of the spatial layout of the transmission scheme, making the The structure of the spinning mill is compact, space-saving, and the adjustment principle is ingenious and reasonable.

The adjustment mechanism includes a pressing jack wire 6 , a ring roller bracket tensioning group 7 , a feeding angle adjusting jack wire 8 and a frame rotating jack wire 9 . The depressing top wire 6 is arranged on the side away from the spinning roller 1.1, the depressing top wire 6 runs through the frame 2 and interferes with the ring roll support 4, the depressing top wire 6 is threadedly connected with the frame 2, and the depressing top wire 6 is set There are two groups, and the two groups of pressing top wires 6 are symmetrically arranged with the rotary roll 1.1. The ring roller support 4 and the frame 2 are fixedly connected by the feed angle adjustment jack screw 8, the feed angle adjustment jack wire 8 is threadedly connected with the frame 2, and the feed angle adjustment jack wire 8 is arranged on both sides of the frame 2 And symmetrical design, each side is provided with two up and down symmetrical feed angle adjustment top wires 8. The rack rotating jack screw 9 passes through the bottom plate base 3 and collides with the rack 2, the rack rotating jack screw 9 is threadedly connected with the bottom plate base 3, and the rack rotating jack screw 9 is provided with two groups, which are respectively arranged on the opposite sides of the bottom plate base 3. on the corner. The ring roller bracket tensioning group 7 is arranged in parallel with the pressing top wire 6. The ring roller bracket tensioning group 7 includes a tension rod 7.1 and a tension spring 7.2. Arranged between the frame 2 and the head of the tie rod 7.1.

的无缝钢管为例，调整设备结构，以达到加工要求。待加工件10坯料尺寸为：外径

壁厚3.5mm；芯模11尺寸：内径

所述的待加工件10的内表面套于芯模11的外表面。待加工件10及芯模11的轴线与旋轧辊轴1.2的中心轴线平行，待加工件10及芯模11布置在旋轧辊1.1外侧。To machine blank size

Take the seamless steel pipe as an example, adjust the equipment structure to meet the processing requirements. The blank size of the workpiece to be processed 10 is: outer diameter

Wall thickness 3.5mm; core mold 11 size: inner diameter

The inner surface of the workpiece 10 to be processed is sleeved on the outer surface of the core mold 11 . The axes of the workpiece 10 and the mandrel 11 are parallel to the central axis of the spinning roll shaft 1.2, and the workpiece 10 and the mandrel 11 are arranged outside the spinning roll 1.1.

The specific adjustment process is as follows:

Adjust the feed angle β: the feed angle adjustment jack screw 8 runs, so that the ring roller bracket 4 and the ring roller assembly 1 rotate around the axis of the driving bevel gear shaft 5.4, while the driven bevel gear shaft 5.3 does not change with the driving bevel gear shaft. 5.4 At the same time of the meshing relationship, the whole rotates around the axis of the drive bevel gear shaft 5.4. Since the arc-shaped chute 2.8 and the arc-shaped slider 4.8 are located on the arc cylindrical surface of the same rotation center, the arc-shaped sliding groove on the outer side of the ring roller bracket 4. The block 4.8 rotates along the arc-shaped chute 2.8 on the inner side of the frame 2, so as to achieve the purpose of adjusting the feeding angle, and adjusting the feeding angle β=0.5°.

Adjusting the yaw angle γ: the rotating top wire 9 of the frame runs, pushing the frame 2 to rotate around the axis of the boss 2.6 in the through hole 3.1 to form a yaw angle γ=10°, which is used to change the spinning process parameters such as the reduction amount and the contact angle of the rotary roll 1.1 with the workpiece 10 to be processed.

Adjust the reduction amount Δt: the adjustment side pushes the lower top wire 6, pushes the roller support 4 to move in the direction of the workpiece 10 to be processed, and the arc-shaped slider 4.8 slides along the arc-shaped chute 2.8 inside the frame 2, so that the rotating roller 1.1 is outside The surface is in contact with the outer surface of the blank of the workpiece 10 to be processed, and the base point for the adjustment of the thinning amount is determined. The workpiece 10 to be processed is withdrawn, and the lower jack wire 6 is pushed sideways to run, and the ring roller bracket 4 is pushed to continue to move in the direction of the workpiece to be processed 10. Repeat the above ring During the movement of the roller support 4, the base point is moved to the direction of the workpiece to be processed 10 and the thinning amount is adjusted, and the thinning amount after adjustment is Δt=1.5 mm.

The transmission assembly 5 is running, and the motor 5.6 is installed on the frame 2; when the motor 5.6 is running, the driving bevel gear shaft 5.4 is driven to rotate through the coupling 5.5, which drives the driven bevel gear shaft 5.3 to rotate, and the driven bevel gear shaft 5.3 drives the intermediate cylindrical gear. 5.2 rotate coaxially, and drive the cylindrical gear 5.1 and the rotating roller assembly 1 on it to rotate. The motor input speed n=800rpm, the bevel gear reduction ratio i=2, and the ring roller output speed n'=400rpm. The workpiece 10 to be processed is fed at a constant speed, and the feeding speed is v=2mm/s, and the workpiece 10 to be processed is uniformly processed under the rotation of the rotary roll 1.1.

When the spinning mill is a double spinning mill, the two groups of spinning mills are arranged symmetrically on different sides. As shown in Figure 6, the two groups of spinning rolls 1.1 are arranged on both sides of the axis of the workpiece 10 to be processed, and are parallel and in the same horizontal plane; During the adjustment process of the two groups of spinning mills, the feed angle β and the yaw angle γ are the same, and the rolling directions of the rolls are the same.

There are two situations for the adjustment of the thinning amount of the two groups of rotary rolls 1.1:

1. The thinning amount Δt is adjusted the same, the workpiece 10 to be processed is fed axially, the trajectories of the two groups of rotating rollers 1.1 on the surface of the workpiece 10 to be processed do not overlap, and the trajectories are adjacent.

2. The thinning amount Δt is different, the thinning amount Δt1=0.9mm and Δt2=0.6mm in one pass, the workpiece 10 to be processed is fed axially, and the two groups of rotating rollers 1.1 overlap the surface track of the workpiece 10 to be processed.

Example 2

Referring to FIG. 7 , this embodiment provides a three-degree-of-freedom spinning mill. The only difference between this embodiment and Embodiment 1 is that this embodiment discloses that when the spinning mill is a three-degree-of-freedom spinning mill, the circumferential direction of the three groups of spinning mills is Evenly arranged, as shown in Figure 7; the three groups of spinning rolls 1.1 are evenly distributed with the central axis of the workpiece 10 as the axis and are in the same axial position; the feeding angle β and the yaw angle γ of the three groups of spinning mills are the same during the adjustment process , the rolls rotate in the same direction.

1. The thinning amount Δt is adjusted the same, the workpiece 10 to be processed is fed along the axial direction, and the trajectories of the three groups of rotating rollers 1.1 on the surface of the workpiece 10 do not overlap, and the trajectories are adjacent.

2. The thinning amount Δt is different, the thinning amount Δt1=0.8mm, Δt2=0.6mm, Δt3=0.4mm, the blank 10 of the workpiece to be processed is fed axially, and the three groups of rotating rollers 1.1 are tracked on the surface of the workpiece 10 to be processed. overlapping.

In the description of the present invention, it should be understood that the terms "portrait", "horizontal", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship indicated by "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, rather than indicating or It is implied that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

The above-mentioned embodiments are only to describe the preferred mode of the present invention, but not to limit the scope of the present invention. Without departing from the design spirit of the present invention, those of ordinary skill in the art can Variations and improvements should fall within the protection scope determined by the claims of the present invention.

Claims (3)

1. A three-degree-of-freedom spinning mill, characterized in that it comprises a spinning roll assembly (1), a ring roll support (4) for installing the spinning roll assembly (1), and a machine for installing the ring roll support (4). A frame (2), a base plate seat (3) plugged into the frame (2), a transmission assembly (5) for providing power to the rotary roller assembly (1), and an adjustment assembly; A set of arc-shaped chute (2.8), the ring roller support (4) is provided with an arc-shaped sliding block (4.8) adapted to the arc-shaped chute (2.8); the rotating roller assembly (1) It comprises a spinning roll (1.1), a spinning roll shaft (1.2) fixedly connected with the spinning roll (1.1), and both ends of the spinning roll shaft (1.2) are connected to the ring roll support (4) through bearings; The adjustment assembly includes a pressing jack wire (6), a ring roller support tensioning group (7), a feeding angle adjustment jack wire (8) and a frame rotating jack wire (9); the pressing jack wire (6) ) runs through the frame (2) in contact with the ring roller support (4), the pressing down screw (6) is threadedly connected with the frame (2); the ring roller support (4) and the frame (2) are fed through the The feed angle adjustment jack screw (8) is fixedly connected, and the feed angle adjustment jack screw (8) is threadedly connected with the frame (2); The frame (2) is in conflict, and the frame rotating jack screw (9) is threadedly connected with the base plate seat (3); A through hole (3.1) is provided at the center of the base plate seat (3), and a boss (2.6) adapted to the through hole (3.1) is provided on the frame (2). (2.6) is cylindrical, the frame (2) can rotate around the through hole (3.1); The tensioning group (7) includes a tension rod (7.1) and a tensioning spring (7.2), the tensioning rod (7.1) is fixedly connected to the ring roller bracket (4) through the frame (2), and the tensioning spring (7.2) is arranged between the frame (2) and the head of the tie rod (7.1); The transmission assembly (5) includes a cylindrical gear (5.1) fixedly connected with the rotary roller shaft (1.2), an intermediate gear (5.2) meshed with the cylindrical gear (5.1), and a driven gear (5.2) fixedly connected with the intermediate gear (5.2). Bevel gear shaft (5.3), drive bevel gear shaft (5.4) meshing with driven bevel gear shaft (5.3), motor (5.6) providing power, and coupling connecting drive bevel gear shaft (5.4) and motor (5.6) Shaft (5.5); the cylindrical gear (5.1), the intermediate gear (5.2) and the driven bevel gear shaft (5.3) are arranged inside the ring roller bracket (4), and the driving bevel gear shaft (5.4) passes through The bearings are respectively connected with the ring roller support (4) and the frame (2). 2. A three-degree-of-freedom rolling mill according to claim 1, characterized in that: the length of the arc-shaped chute (2.8) is greater than the length of the arc-shaped sliding block (4.8). 3. A three-degree-of-freedom rotary rolling mill according to claim 1, characterized in that: the maximum rotation outer diameter of the rotary rolling roll (1.1) is larger than the maximum rotation outer diameter of the cylindrical gear (5.1).

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