CN215392515U - Centering support assembly for lathe and horizontal lathe - Google Patents
Centering support assembly for lathe and horizontal lathe Download PDFInfo
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- CN215392515U CN215392515U CN202121407066.4U CN202121407066U CN215392515U CN 215392515 U CN215392515 U CN 215392515U CN 202121407066 U CN202121407066 U CN 202121407066U CN 215392515 U CN215392515 U CN 215392515U
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Abstract
The utility model provides a centering support assembly for a lathe and a horizontal lathe. The centering support assembly for a lathe includes: a holder having fitting through-holes arranged in a first direction; the shaft sleeve is positioned in the assembling through hole and can be rotatably arranged relative to the support, the axis of the shaft sleeve is overlapped or parallel to the axis of the assembling through hole, the shaft sleeve is provided with an axial through hole for the part to be turned to penetrate out and a radial mounting hole communicated with the axial through hole, and an included angle is formed between the axis of the axial through hole and the axis of the radial mounting hole; and at least part of the screw rod is positioned in the radial mounting hole, and the screw rod is movably arranged relative to the radial mounting hole along the axis of the radial mounting hole so as to center and align the piece to be turned. The technical scheme of the utility model solves the problem that the centering support assembly in the prior art has low efficiency in centering and aligning the steel catenary riser waiting for the turning piece.
Description
Technical Field
The utility model relates to the technical field of steel pipe machining, in particular to a centering support assembly for a lathe and a horizontal lathe.
Background
With the exhaustion of land oil and gas resources, the development of marine oil and gas resources is promoted to various national schedules, in particular to the development of deep sea seabed oil and gas. The Steel Catenary Riser (SCR) is used for connecting an ocean platform and a submarine pipeline pipe, and is a scheme with higher cost performance in various risers. One end of the Steel Catenary Riser (SCR) is connected with an ocean platform, and the other end of the steel catenary riser is connected with a submarine pipeline pipe, so the requirement on the dimensional precision of the pipe end is high, the high precision requirement is difficult to realize by conventional hot rolling and cold drawing, and the pipe end machining is required by the Steel Catenary Riser (SCR).
One end of a Steel Catenary Riser (SCR) is connected to the subsea pipeline and this end needs to be dimensioned to the subsea pipeline. While some specifications of Steel Catenary Risers (SCR) are heavy, typically more than 2 tons and 12.2m ± 0.1m long, which is an overlength process in the machining industry.
In the prior art, a centering support assembly of a horizontal lathe needs to adjust a plurality of mutually associated screws to perform centering and centering on a to-be-turned part (a steel catenary riser), so that the problem of slow centering and centering exists, the problem of low centering and centering efficiency is caused, and the processing time is prolonged.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide a centering support assembly for a lathe and a horizontal lathe, and aims to solve the problem that the centering support assembly in the prior art is low in efficiency when centering and aligning a turning part waiting for a steel catenary riser.
In order to achieve the above object, according to one aspect of the present invention, there is provided a centering support assembly for a lathe, including: a holder having fitting through-holes arranged in a first direction; the shaft sleeve is positioned in the assembling through hole and can be rotatably arranged relative to the support, the axis of the shaft sleeve is overlapped or parallel to the axis of the assembling through hole, the shaft sleeve is provided with an axial through hole for the part to be turned to penetrate out and a radial mounting hole communicated with the axial through hole, and an included angle is formed between the axis of the axial through hole and the axis of the radial mounting hole; and at least part of the screw rod is positioned in the radial mounting hole, and the screw rod is movably arranged relative to the radial mounting hole along the axis of the radial mounting hole so as to center and align the piece to be turned.
Furthermore, at least part of the inner wall surface of the radial mounting hole is provided with internal threads, at least part of the outer wall surface of the screw rod is provided with external threads, and the internal threads are matched with the external threads so as to convert the rotary motion of the screw rod relative to the radial mounting hole into the linear motion of the screw rod relative to the shaft sleeve.
Further, the screw rod includes the body and sets up in the portion of twisting of body, and the outer wall of body is equipped with the external screw thread, and under the effect of external force, it drives the axis removal of body along radial mounting hole to twist the portion of twisting.
Further, radial mounting hole is the through-hole, and centering supporting component still dodges the groove including setting up in the internal face of assembly through-hole, dodges groove and assembly through-hole intercommunication.
Furthermore, be equipped with a plurality of radial mounting holes on the axle sleeve, a plurality of radial mounting holes set up around the axis interval of axle sleeve, and centering supporting component includes a plurality of screws, and a plurality of screws correspond the setting with a plurality of radial mounting holes.
Furthermore, the centering support assembly further comprises a bearing located between the inner wall surface of the assembling through hole and the outer wall surface of the shaft sleeve, an outer ring of the bearing is connected with the inner wall of the assembling through hole, and an inner ring of the bearing is connected with the outer wall of the shaft sleeve.
Further, the shaft sleeve comprises a first shaft section and a second shaft section connected with the first shaft section, the diameter of the first shaft section is smaller than that of the second shaft section, the bearing is located between the outer wall surface of the first shaft section and the inner wall surface of the assembling through hole, and the axial through hole penetrates through the first shaft section and the second shaft section.
According to another aspect of the present invention, there is provided a horizontal lathe comprising: a bed body; the centering support assembly is movably arranged on the lathe bed along a first direction; the outer chuck structure comprises a first clamping jaw used for clamping a piece to be turned, and the outer chuck structure is rotatably arranged on the lathe bed.
Further, the horizontal lathe further comprises: the tailstock is arranged on the lathe bed; the inner chuck structure is rotatably arranged on the tailstock and comprises a chuck and a second clamping jaw arranged on the chuck, the second clamping jaw is positioned in the piece to be turned to support the piece to be turned, and the centering support assembly is positioned between the outer chuck structure and the inner chuck structure; the first anti-abrasion piece is arranged on the circumferential outer wall of at least part of the second clamping jaws, and the circumferential outer wall of the second clamping jaws is abutted to the inner wall surface of the piece to be turned through the first anti-abrasion piece.
Further, the horizontal lathe also comprises a second anti-abrasion piece, and at least part of the circumferential inner wall of the first clamping jaw of the outer chuck structure is provided with the second anti-abrasion piece.
By applying the technical scheme of the utility model, the shaft sleeve and the screw rod positioned in the radial mounting hole of the shaft sleeve are arranged, and the screw rod can move relative to the shaft sleeve along the axis of the radial mounting hole, so that one end, facing the axial through hole, of the screw rod is abutted to the steel catenary riser waiting turning part by adjusting the position of the screw rod relative to the shaft sleeve, the steel catenary riser waiting turning part can be clamped, the position, waiting turning part, of the steel catenary riser positioned in the axial through hole of the shaft sleeve can be adjusted, the steel catenary riser waiting turning part can be quickly centered and centered, and thus the centering support assembly can realize the function of quick centering and centering, and the centering and centering efficiency and the clamping efficiency of the steel catenary riser waiting turning part can be obviously improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:
FIG. 1 shows a schematic structural view of a centering support assembly of an embodiment of the present invention;
FIG. 2 illustrates a cross-sectional view A-A of the centering support assembly of FIG. 1;
FIG. 3 shows a schematic structural diagram of an inner chuck structure of an embodiment of the present invention;
FIG. 4 shows a cross-sectional view of the inner chuck structure of FIG. 3;
FIG. 5 is a schematic structural view of a horizontal lathe according to an embodiment of the present invention for machining an outer circle of a workpiece to be turned;
FIG. 6 is a schematic structural diagram of the horizontal lathe for machining the inner hole of the part to be turned according to the embodiment of the utility model;
FIG. 7 shows a schematic structural view of a part to be turned according to an embodiment of the utility model;
FIG. 8 shows a close-up view at A of the piece to be turned of FIG. 7; and
fig. 9 shows a partial enlarged view of the part to be turned in fig. 7 at B.
Wherein the figures include the following reference numerals:
1. a piece to be turned; 10. a support; 11. assembling the through hole; 12. an avoidance groove; 20. a shaft sleeve; 21. a first shaft section; 22. a second shaft section; 23. an axial through hole; 30. a screw; 31. a body; 32. a screwing part; 40. a bearing; 50. an outer chuck structure; 60. a tailstock; 61. an inner chuck structure; 62. a chuck; 63. a second jaw; 70. a first wear member.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
It should be noted that, compared with the conventional horizontal lathe, the horizontal lathe of the embodiment of the present invention uses the centering support assembly, the inner chuck structure 61 and the outer chuck structure 50 in combination, so as to machine the to-be-turned member 1 (marine pipe workpiece with length > 12m and weight > 3 t) with a long length and a large mass.
It should be noted that the horizontal lathe of the embodiment of the present invention is used for machining a steel catenary riser, because the outer surface of the steel catenary riser is not a perfect circle but has a certain ovality, so that the steel pipe can be centered and aligned by adjusting the positions of the screw rods 30 relative to the shaft sleeves 20.
Compared with the conventional horizontal lathe, the horizontal lathe provided by the embodiment of the utility model has better machining precision, and can achieve the precision of +/-0.05 mm.
It should be noted that the horizontal lathe according to the embodiment of the present invention can process a steel pipe, such as a steel catenary riser, which meets the standard and contract requirements but has a certain curvature.
As shown in fig. 1 and 2, an embodiment of the present invention provides a centering support assembly for a lathe, including a support 10, a sleeve 20, and a screw 30. Wherein the holder 10 has fitting through-holes 11 arranged in a first direction; the shaft sleeve 20 is positioned in the assembling through hole 11, the shaft sleeve 20 is rotatably arranged relative to the support 10, the axis of the shaft sleeve 20 is overlapped with or parallel to the axis of the assembling through hole 11, the shaft sleeve 20 is provided with an axial through hole 23 for allowing the part 1 to be turned to penetrate out and a radial mounting hole communicated with the axial through hole 23, and an included angle is formed between the axis of the axial through hole 23 and the axis of the radial mounting hole; at least part of the threaded rod 30 is located in the radial mounting hole, and the threaded rod 30 is movably arranged relative to the radial mounting hole along the axis of the radial mounting hole so as to center and align the element to be turned 1.
Among the above-mentioned technical scheme, through setting up axle sleeve 20 and the screw rod 30 that is located the radial mounting hole of axle sleeve 20, and the screw rod 30 can remove along the axis of radial mounting hole for axle sleeve 20, like this, through adjusting screw rod 30 for the position of axle sleeve 20, make screw rod 30 towards the one end of axial through-hole 23 with treat turning 1 butt, just can treat turning 1 and carry out the centre gripping, thereby can adjust the position of treating turning 1 that is located the axial through-hole 23 of axle sleeve 20, and then treat turning 1 fast and carry out the centering alignment, just so can make the centering strut subassembly realize the function of quick centering alignment, thereby show the improvement and treat the clamping efficiency of turning 1.
Preferably, in the embodiment of the present invention, the member to be turned 1 is a steel catenary riser. Of course, the centering support assembly of the embodiment of the utility model can also support and position other pipes.
In particular, in the embodiment of the utility model, the sleeve 20 is rotatably arranged relative to the support 10, so that when the element 1 to be turned is turned, the element 1 to be turned is rotated, so that the sleeve 20 can rotate together with the element 1 to be turned, and during the rotation, the sleeve 20 and the screw 30 together support and clamp the element 1 to be turned.
Preferably, in the embodiment of the present invention, the axis of the radial mounting hole extends along the radial direction of the shaft sleeve 20, so that the axis of the screw 30 located in the radial mounting hole is also arranged along the radial direction of the shaft sleeve 20, and thus, the position of the to-be-turned part 1 in the axial through hole of the shaft sleeve 20 can be adjusted by using the screw 30, thereby facilitating the alignment of the to-be-turned part.
As shown in fig. 1 and 2, in the embodiment of the present invention, at least a portion of the inner wall surface of the radial mounting hole is provided with an internal thread, and at least a portion of the outer wall surface of the screw 30 is provided with an external thread, and the internal thread is engaged with the external thread to convert the rotational movement of the screw 30 relative to the radial mounting hole into the linear movement of the screw 30 relative to the sleeve 20.
Through the arrangement, the external thread of the outer wall surface of the screw rod 30 is matched with the internal thread of the inner wall surface of the radial mounting hole, when the screw rod 30 rotates relative to the radial mounting hole, the screw rod 30 can move along the axis of the radial mounting hole, so that the screw rod 30 moves relative to the shaft sleeve 20 along the radial direction of the shaft sleeve 20, the position of the screw rod 30 relative to the shaft sleeve 20 can be adjusted, the position of the part to be turned 1 relative to the shaft sleeve 20 is adjusted, and therefore the part to be turned 1 can be clamped, centered and aligned.
As shown in fig. 1 and 2, in the embodiment of the present invention, the screw 30 includes a body 31 and a screwing portion 32 disposed on the body 31, an outer wall surface of the body 31 is provided with an external thread, and the screwing portion 32 drives the body 31 to move along an axis of the radial mounting hole under the action of an external force.
With the above arrangement, the screwing part 32 can be rotated by an external force acting on the screwing part 32, so that the screwing part 32 drives the body 31 to rotate, and the rotation of the body 31 relative to the radial mounting hole is converted into the movement of the body 31 relative to the shaft sleeve 20, so that the position of the screw 30 relative to the shaft sleeve 20 is adjusted to center the to-be-turned piece 1.
Preferably, in the embodiment of the present invention, the screw part 32 is a hexagonal prism, so that the screw part 32 can be rotated by a wrench acting on the screw part 32. Of course, in alternative embodiments, a cross-shaped slot or the like may be provided at the end of the screw portion 32.
As shown in fig. 2, in the embodiment of the present invention, the radial mounting hole is a through hole, the centering support assembly further includes an avoidance groove 12 provided on an inner wall surface of the fitting through hole 11, and the avoidance groove 12 is communicated with the fitting through hole 11.
With the above arrangement, when the screw 30 moves in a direction away from the axial through hole 23, a part of the screw 30 can enter the escape groove 12, and thus, the inner wall surface of the fitting through hole 11 of the holder 10 can be prevented from interfering with the screw 30, so that the screw 30 can move more smoothly in the radial direction of the sleeve 20.
As shown in fig. 1, in the embodiment of the present invention, a plurality of radial mounting holes are formed in the shaft sleeve 20, the plurality of radial mounting holes are spaced around the axis of the shaft sleeve 20, the centering support assembly includes a plurality of threaded rods 30, and the plurality of threaded rods 30 are disposed corresponding to the plurality of radial mounting holes.
Among the above-mentioned technical scheme, through setting up a plurality of radial mounting holes and a plurality of screw rod 30, like this, can make screw rod 30 from all directions with treat turning 1 butt to can treat turning 1 better and carry out the centre gripping.
Specifically, in the embodiment of the present invention, the plurality of screws 30 are not interfered with each other and can be individually adjusted, so that the position of the member to be turned 1 can be adjusted by individually adjusting any one of the screws 30, and the efficiency of centering and aligning the centering and supporting assembly can be further improved.
Preferably, in the embodiment of the present invention, the plurality of radial mounting holes are uniformly spaced around the axis of the shaft sleeve 20, so that the member 1 to be turned can be stressed more uniformly when clamping the member 1 to be turned.
The inventor knows that a horizontal lathe roller type centering support device comprises 12 screws, when a workpiece to be turned 1 is centered and aligned, 4 screws on a regulating roller and 8 screws on a roller shaft sleeve are respectively needed, and the 12 screws can mutually influence each other, so that the centering and aligning efficiency is low.
Thus, in the embodiment of the present invention, as shown in FIG. 1, the number of radial mounting holes and screws 30 is four. In this way, the centering and alignment of the part to be turned 1 can be performed only by adjusting the positions of the four threaded rods 30 relative to the sleeve 20, thereby effectively improving the efficiency of the centering and alignment of the centering and supporting assembly.
Of course, in alternative embodiments not shown in the drawings, the number of radial mounting holes and screws 30 may each be provided as three or five or six, etc.
As shown in fig. 2, in the embodiment of the present invention, the centering support assembly further includes a bearing 40 located between the inner wall surface of the fitting through-hole 11 and the outer wall surface of the sleeve 20, an outer ring of the bearing 40 is connected to the inner wall of the fitting through-hole 11, and an inner ring of the bearing 40 is connected to the outer wall of the sleeve 20.
With the above arrangement, the sleeve 20 can be rotated more smoothly with respect to the holder 10.
As shown in fig. 2, in the embodiment of the present invention, the shaft sleeve 20 includes a first shaft section 21 and a second shaft section 22 connected to the first shaft section 21, the diameter of the first shaft section 21 is smaller than that of the second shaft section 22, the bearing 40 is located between the outer wall surface of the first shaft section 21 and the inner wall surface of the fitting through hole 11, and the axial through hole 23 penetrates the first shaft section 21 and the second shaft section 22.
In the above technical solution, by providing the first shaft segment 21, and the diameter of the first shaft segment 21 is smaller than the diameter of the second shaft segment 22, the bearing 40 can be located at the outer periphery of the first shaft segment 21, and the step surface formed between the first shaft segment 21 and the second shaft segment 22 can prevent the bearing 40 from moving axially, so that the shaft sleeve 20 can rotate smoothly and smoothly relative to the support 10.
Preferably, as shown in fig. 2, in the embodiment of the present invention, the number of the first shaft segments 21 is two, and the two first shaft segments 21 are respectively located at the left and right ends of the second shaft segment 22. Of course, in alternative embodiments not shown in the drawings, the number of bearings 40 may be one or three, etc.
Preferably, as shown in fig. 2, in the embodiment of the present invention, the number of the bearings 40 is two, and two bearings 40 are respectively located at the left and right ends of the second shaft section 22, that is, the bearings 40 are located at the outer periphery of the first shaft section 21. Of course, in alternative embodiments not shown in the drawings, the number of bearings 40 may be one or three, etc.
When a piece 1 to be turned (a steel catenary SCR vertical pipe) is machined by a traditional horizontal lathe known by the inventor, the piece 1 to be turned is easy to swing in the rotating process, so that a centering roller of the horizontal lathe is abraded, a machined surface of the piece 1 to be turned is rough and has grains, and the dimensional accuracy of the piece 1 to be turned after machining cannot meet the requirement of a customer. And when the horizontal lathe is used for independently turning the outer circle or the inner hole of the steel pipe, the processing efficiency is low, only 0.25-0.5 pipe ends can be processed in each hour on average, and the processing precision and the surface quality can not meet the requirements of the steel catenary riser.
It should be noted that, when a long core rod is machined by a traditional horizontal lathe, the traditional horizontal lathe generally only needs to machine the outer surface, and the wall thickness requirement of the long core rod is loose (the wall thickness machining allowance is 5-15 mm), so that sectional machining can be adopted, the bent part of the long core rod is machined firstly, the bending degree and the ovality after machining are small, and then the rest of sections are machined by centering and centering, so that the precision of the outer diameter after machining is +/-0.1-0.2 mm, and then grinding and polishing treatment are carried out after machining. However, when the conventional horizontal lathe is used for machining the steel catenary riser, the machining allowance of the wall thickness of the inner hole is only 1-3 mm, and the ovality and the curvature of the steel pipe cannot be eliminated through turning, so that the steel pipe can be thrown in the machining process, and the quality of the steel pipe after machining is poor.
It should be noted that after the steel catenary riser is machined by a traditional horizontal lathe, the outer wall surface of the steel catenary riser can have ripples and tool marks, has obvious uneven hand feeling, is still difficult to eliminate after polishing, has pits and dense tool marks in a transition area, and has obvious fluctuation in the machined outer diameter. And after the traditional horizontal lathe is adopted to process the steel catenary riser, the outer diameter ovality of the processing surface, close to the clamping end, of the steel catenary riser is normal, and the outer diameter ovality of the processing surface, far away from the clamping end, of the steel catenary riser is 0.5-0.8 mm, so that the product is not qualified.
Accordingly, as shown in fig. 5 and 6, an embodiment of the present invention provides a horizontal lathe including a lathe bed, the centering support assembly described above, and an outer chuck structure 50. The centering support assembly is movably arranged on the lathe bed along a first direction; the outer chuck structure 50 comprises a first jaw for clamping the piece to be turned 1, and the outer chuck structure 50 is rotatably arranged on the lathe bed.
Through the arrangement, the outer chuck structure 50 clamps one end of the to-be-turned piece 1, and the centering support assembly is used for clamping and supporting any position between two ends of the to-be-turned piece 1, so that the horizontal lathe can process the longer to-be-turned piece 1, and the centering support assembly can avoid the to-be-turned piece 1 from swinging in the machining process, so that the machining quality of the to-be-turned piece 1 is improved.
It should be noted that the horizontal lathe according to the embodiment of the present invention employs two centering support assemblies, and each centering support assembly only needs to adjust 4 screws 30, so that the clamping time is increased to 0.5 h-1 h relative to 1 h-1.5 h of the horizontal lathe known by the inventor.
Specifically, as shown in fig. 6, in the embodiment of the present invention, the horizontal lathe includes two centering support assemblies, when processing the inner hole of the to-be-turned member 1, the left end of the to-be-turned member 1 is clamped by the outer chuck structure 50, the right end of the to-be-turned member 1 is supported and positioned by one centering support assembly located at the right end, and the distance between this centering support assembly and the right end of the to-be-turned member 1 is between 500mm and 700mm, and the distance between the other centering support assembly located at the left end and the centering support assembly located at the right end is equal to the distance between the centering support assembly located at the left end and the outer chuck structure 50, so that the to-be-turned member 1 can be better supported, thereby preventing the to-be-turned member 1 from swinging.
As shown in fig. 3 and 4, in the embodiment of the present invention, the horizontal lathe further includes a tailstock 60, an inner chuck structure 61, and a first wear prevention member 70. Wherein, the tailstock 60 is arranged on the lathe bed; the inner chuck structure 61 is rotatably arranged on the tailstock 60, the inner chuck structure 61 comprises a chuck 62 and a second jaw 63 arranged on the chuck 62, the second jaw 63 is positioned inside the piece to be turned 1 to support the piece to be turned 1, and the centering support assembly is positioned between the outer chuck structure 50 and the inner chuck structure 61; at least part of the circumferential outer wall of the second jaw 63 is provided with a first anti-abrasion piece 70, and the circumferential outer wall of the second jaw 63 is abutted against the inner wall surface of the piece to be turned 1 through the first anti-abrasion piece 70.
Through the arrangement, the inner chuck structure 61 can support one end of the piece to be turned 1, and the circumferential outer wall of the second clamping jaw 63 can be prevented from scratching and wearing the inner wall surface of the inner hole of the piece to be turned 1 through the arrangement of the first anti-abrasion piece 70.
Specifically, in the embodiment of the present invention, the chuck 62 is connected to the tailstock 60 through a bearing, so that the inner chuck structure 61 can rotate relative to the tailstock 60.
Specifically, as shown in fig. 5, in the embodiment of the present invention, the horizontal lathe includes two centering support assemblies, and the two centering support assemblies are located between an outer chuck structure 50 and an inner chuck structure 61, when the outer circle of the object 1 to be turned is machined, the left end of the object 1 to be turned is clamped by the outer chuck structure 50, the right end of the object 1 to be turned is clamped by the inner chuck structure 61, the distance between the centering support assembly located at the right end of fig. 5 and the right end of the object 1 to be turned is between 0.8m and 1m, the distance between the other centering support assembly (i.e., the centering support assembly located at the left end of fig. 5) and the centering support assembly located at the right end is equal to the distance between the centering support assembly located at the left end of fig. 5 and the outer chuck structure 50, so that the object 1 to be turned can be better supported, thereby preventing to wait that turning 1 takes place the whipping, and then improve the surface quality who waits turning 1.
It should be noted that, after the horizontal lathe of the embodiment of the present invention is used to machine the to-be-turned part 1, the surface of the machining end of the to-be-turned part 1 is smooth, and the outer circle precision of the to-be-turned part 1 can reach within ± 0.05mm, so as to meet the customer requirements.
Preferably, in this embodiment of the present invention, the first wear-resistant member 70 is a copper sheet with a smooth surface. Of course, in alternative embodiments, the first wear member 70 could also be a smooth surfaced steel sheet or the like.
In an embodiment of the utility model, the horizontal lathe further comprises a second wear-resistant member, and at least part of the circumferential inner wall of the first jaw of the outer chuck structure 50 is provided with the second wear-resistant member.
Through the arrangement, the circumferential inner wall of the first clamping jaw can be prevented from being scratched or worn on the outer wall surface of the part to be turned 1.
Preferably, in an embodiment of the present invention, the second wear-resistant member is a steel sheet with a smooth surface. Of course, in alternative embodiments, the second wear-resistant member may be a copper sheet with a smooth surface, or the like.
When the transition end of the steel catenary riser (to-be-turned part 1) is machined by using the horizontal lathe according to the embodiment of the utility model, firstly, the outer circle of the Steel Catenary Riser (SCR) is machined, and then the inner diameter of the steel catenary riser is machined by taking the circle center of the outer circle of the steel catenary riser as a reference.
It should be noted that, as shown in fig. 7, 8 and 9, with the horizontal lathe for machining a Steel Catenary Riser (SCR) according to an embodiment of the present invention, the steel catenary riser can meet the following criteria:
length of steel pipe: 12.2 +/-0.1 m;
outer diameter OD: target value ± 0.25 mm;
inner diameter ID: target value ± 0.25 mm;
taper of the excircle transition region: 1: 5;
taper of an inner hole transition area: 1: 8;
excircle transition arc radius: the minimum value is 10 mm;
inner hole transition arc radius: minimum value of 1.6 mm;
and (3) smoothness: surface smoothness RMS (effective value) is less than or equal to 6.4 μm;
length L of parallel segment of excircle after machining1：
Length L of parallel section of inner hole after machining2：
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: through setting up the axle sleeve and being located the radial mounting hole's of axle sleeve screw rod, and the screw rod can remove along the axis of radial mounting hole for the axle sleeve, thus, through adjusting screw rod for the position of axle sleeve, make the screw rod towards the one end of axial through-hole with treat turning piece butt, just can treat turning piece and carry out the centre gripping, thereby can adjust the position of treating turning piece that is located in the axial through-hole of axle sleeve, and then treat turning piece fast and carry out centering alignment, just so can make centering support assembly realize the function of quick centering alignment, thereby show the centering alignment efficiency and the centre gripping efficiency of treating turning piece that improve.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A centering support assembly for a lathe, comprising:
a holder (10) having a fitting through-hole (11) arranged in a first direction;
the shaft sleeve (20) is positioned in the assembling through hole (11), the shaft sleeve (20) is rotatably arranged relative to the support (10), the axis of the shaft sleeve (20) is coincident with or parallel to the axis of the assembling through hole (11), the shaft sleeve (20) is provided with an axial through hole (23) for allowing the part (1) to be turned to penetrate out and a radial mounting hole communicated with the axial through hole (23), and an included angle is formed between the axis of the axial through hole (23) and the axis of the radial mounting hole;
and at least part of the screw rod (30) is positioned in the radial mounting hole, and the screw rod (30) is movably arranged relative to the radial mounting hole along the axis of the radial mounting hole so as to center and align the part to be turned (1).
2. A centring support assembly for turning machines as claimed in claim 1, characterized in that at least part of the inner wall surface of said radial mounting hole is provided with an internal thread and at least part of the outer wall surface of said threaded rod (30) is provided with an external thread, said internal thread cooperating with said external thread to convert the rotary motion of said threaded rod (30) relative to said radial mounting hole into a linear motion of said threaded rod (30) relative to said sleeve (20).
3. The centering support assembly for the lathe according to claim 1, wherein the screw (30) comprises a body (31) and a screwing part (32) arranged on the body (31), the outer wall surface of the body (31) is provided with an external thread, and the screwing part (32) drives the body (31) to move along the axis of the radial mounting hole under the action of an external force.
4. The centering support assembly for a lathe according to claim 1, wherein the radial mounting hole is a through hole, the centering support assembly further comprises an avoiding groove (12) provided on an inner wall surface of the fitting through hole (11), and the avoiding groove (12) is communicated with the fitting through hole (11).
5. The centering support assembly for a lathe according to any one of claims 1 to 4, wherein a plurality of radial mounting holes are provided in the sleeve (20), the plurality of radial mounting holes being arranged at intervals around an axis of the sleeve (20), the centering support assembly including a plurality of threaded rods (30), the plurality of threaded rods (30) being arranged in correspondence with the plurality of radial mounting holes.
6. The centering support assembly for a lathe according to any one of claims 1 to 4, further comprising a bearing (40) between an inner wall surface of the fitting through hole (11) and an outer wall surface of the sleeve (20), an outer ring of the bearing (40) being connected to an inner wall of the fitting through hole (11), and an inner ring of the bearing (40) being connected to an outer wall of the sleeve (20).
7. The centering support assembly for a lathe according to claim 6, wherein the bushing (20) includes a first shaft section (21) and a second shaft section (22) connected to the first shaft section (21), the first shaft section (21) has a diameter smaller than that of the second shaft section (22), the bearing (40) is located between an outer wall surface of the first shaft section (21) and an inner wall surface of the fitting through hole (11), and the axial through hole (23) penetrates the first shaft section (21) and the second shaft section (22).
8. A horizontal lathe, comprising:
a bed body;
the centering support assembly of any one of claims 1 to 7, movably disposed to the bed along the first direction;
the outer chuck structure (50) comprises a first clamping jaw used for clamping the piece (1) to be turned, and the outer chuck structure (50) is rotatably arranged on the lathe bed.
9. The horizontal lathe according to claim 8, further comprising:
a tailstock (60) arranged on the lathe bed;
an inner chuck structure (61) rotatably arranged on the tailstock (60), wherein the inner chuck structure (61) comprises a chuck (62) and second jaws (63) arranged on the chuck (62), the second jaws (63) are positioned inside the piece to be turned (1) to support the piece to be turned (1), and the centering support assembly is positioned between the outer chuck structure (50) and the inner chuck structure (61);
the turning tool comprises a first anti-abrasion piece (70), at least part of the circumferential outer wall of the second clamping jaw (63) is provided with the first anti-abrasion piece (70), and the circumferential outer wall of the second clamping jaw (63) is abutted to the inner wall surface of the to-be-turned piece (1) through the first anti-abrasion piece (70).
10. The horizontal lathe according to claim 8, characterized in that it further comprises a second wear-proof element provided at least in part on the circumferential inner wall of the first jaws of the outer chuck structure (50).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121407066.4U CN215392515U (en) | 2021-06-23 | 2021-06-23 | Centering support assembly for lathe and horizontal lathe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121407066.4U CN215392515U (en) | 2021-06-23 | 2021-06-23 | Centering support assembly for lathe and horizontal lathe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215392515U true CN215392515U (en) | 2022-01-04 |
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ID=79641372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121407066.4U Active CN215392515U (en) | 2021-06-23 | 2021-06-23 | Centering support assembly for lathe and horizontal lathe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215392515U (en) |
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2021
- 2021-06-23 CN CN202121407066.4U patent/CN215392515U/en active Active
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