CN107984278B - Spindle support for cylindrical workpieces - Google Patents

Spindle support for cylindrical workpieces Download PDF

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Publication number
CN107984278B
CN107984278B CN201711089479.0A CN201711089479A CN107984278B CN 107984278 B CN107984278 B CN 107984278B CN 201711089479 A CN201711089479 A CN 201711089479A CN 107984278 B CN107984278 B CN 107984278B
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mandrel
transition joint
cylindrical
split
cylindrical workpiece
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CN107984278A (en
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朱厚玲
陈云节
张辉
刘云
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q3/00Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/12Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for securing to a spindle in general
    • B23Q3/14Mandrels in general

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  • Mechanical Engineering (AREA)
  • Jigs For Machine Tools (AREA)

Abstract

The invention discloses a mandrel supporting device for a cylindrical workpiece, which comprises: mandrel, subdivision formula bushing and a plurality of length adjustment pole, subdivision formula bushing clamp are established on the mandrel, and a plurality of length adjustment poles evenly distributed along subdivision formula bushing outward flange circumference, and the length adjustment pole includes: the tubulose spare, the axle sleeve, transition joint, the vaulting pole, ejector pin and kicking block subassembly, tubulose spare and subdivision formula lining body fixed connection, the axle sleeve is installed in the tubulose spare, the transition joint both ends are equipped with the screw thread, transition joint one end passes through threaded connection with the axle sleeve, threaded connection is passed through with the one end of vaulting pole to the transition joint other end, the axle sleeve, the vaulting pole is opposite with revolving to of the screw hole that the transition joint is connected, threaded connection is passed through with the one end of ejector pin to the other end of vaulting pole, the ejector pin other end is connected with the kicking block subassembly, the kicking block subassembly is used for and offsets. The invention is suitable for large-size cylindrical workpieces, and improves the adaptability of the mandrel support device.

Description

Spindle support for cylindrical workpieces
Technical Field
The invention relates to the technical field of machining, in particular to a mandrel supporting device for a cylindrical workpiece.
Background
In the technical field of machining, cylindrical workpieces such as a turning roller, a winding drum, a shield shell and the like are supported by a mandrel in a clamping mode, the purpose of clamping the cylindrical workpieces is achieved by supporting the inner walls of the cylindrical workpieces in the clamping mode of the mandrel, the cutter can be free of obstruction of a clamping tool when the cutter is used for machining the outer walls of the cylindrical workpieces, and the difficulty of machining the cylindrical workpieces by a lathe is reduced. Currently, several mandrel forms are common including: cylinder mandrel, taper mandrel, expansion mandrel, and the like. The cylindrical mandrel is suitable for the condition that the length size of the cylindrical workpiece is smaller than the aperture size, the taper mandrel is mainly used for disc parts, and the expansion mandrel is suitable for clamping small and medium cylindrical workpieces.
In the process of implementing the invention, the inventor finds that the prior art has at least the following problems:
the existing mandrel clamping mode has poor adaptability to large cylindrical workpieces, a cylindrical mandrel can be only used under the condition that the length size of the cylindrical workpiece is smaller than the aperture size, the cylindrical mandrel is a solid shaft, and the solid shaft needs to be consistent with the inner diameter size of the clamped cylindrical workpiece, so that the clamping of the cylindrical workpiece can be realized, when the cylindrical workpiece with a larger aperture is clamped, the manufacturing cost of the cylindrical mandrel is increased, the expansion mandrel is generally matched with the radial taper between an expansion ring and an expansion sleeve, so that the support size of the expansion mandrel can be finely adjusted within a small range, the expansion mandrel is also used for supporting the inner wall of the cylindrical workpiece by the solid shaft, and if the large-size cylindrical workpiece needs to be clamped, the size of the mandrel needs to be increased, and the cost is increased. Therefore, the clamping capacity of the existing mandrel clamping technology for large cylindrical workpieces is limited.
Disclosure of Invention
In order to solve the problem that the existing spindle supporting device is poor in adaptability to large cylindrical workpieces, the embodiment of the invention provides a spindle supporting device for the cylindrical workpieces. The technical scheme is as follows:
an embodiment of the present invention provides a spindle supporting device for a cylindrical workpiece, including: the split lining body comprises two half-cylinder structures, the split lining body is clamped on the mandrel through the two half-cylinder structures, one end of the length adjusting rod is fixed on the split lining body, the length adjusting rods are evenly distributed along the circumferential direction of the outer edge of the split lining body, and each length adjusting rod comprises: the pipe-shaped part is fixedly connected with the split lining body, the shaft sleeve is installed in the pipe-shaped part, threads are arranged at two ends of the transition joint, one end of the transition joint is connected with the shaft sleeve through threads, the other end of the transition joint is connected with one end of the support rod through threads, the rotation directions of threaded holes formed by the shaft sleeve and the support rod and connected with the transition joint are opposite, the other end of the support rod is connected with one end of the support rod through threads, the other end of the support rod is connected with the top block assembly, the top block assembly is used for abutting against the inner wall of a cylindrical workpiece to be machined, the support rods are multiple, the length of each support rod is different, the transition joint is multiple, the length of each transition joint is different, and the shaft sleeve is sleeved in the pipe-shaped part, the axle sleeve with tubular member contact position is equipped with the pinhole, half the seting up in the pinhole the axle sleeve outer wall, half the seting up in the pinhole tubular member inner wall, the round pin axle has been inserted in the pinhole.
In one implementation of the embodiment of the invention, two of the split liners are clamped on the mandrel.
In another implementation manner of the embodiment of the invention, a connecting plate is arranged between two adjacent tubular members.
In another implementation manner of the embodiment of the present invention, one end of the ejector rod connected to the ejector block assembly is of a hemispherical structure, and a groove for accommodating the hemispherical structure is disposed on one end surface of the ejector block assembly connected to the ejector rod.
In another implementation manner of the embodiment of the present invention, the top block assembly includes a top block body, a tolerance plate and a cover plate, the tolerance plate is fixed on an end surface of the top block body by using a screw, the tolerance plate abuts against an inner wall of the cylindrical workpiece, a circular hole is formed in the cover plate, the diameter of the circular hole is smaller than that of the hemispherical structure, and the cover plate fixes the hemispherical structure in the groove by using a bolt.
In another implementation manner of the embodiment of the present invention, an end surface of the ejector block body connected to the tolerance plate is a cylindrical surface, and an arc outer diameter of the cylindrical surface of the ejector block body is the same as an inner hole diameter of the cylindrical workpiece.
In another implementation manner of the embodiment of the present invention, two end surfaces of the mandrel are provided with central holes using a center line of the mandrel as a reference line, and a cross-sectional circular surface in an axial direction of the mandrel has a constant diameter.
In another implementation of the embodiment of the invention, the two half-cylinder structures of the split liner are connected by a detachable fastener.
In another implementation of the embodiment of the present invention, an annular rubber ring is disposed between the split liner and the mandrel.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
according to the embodiment of the invention, the split lining body is clamped on the mandrel, the plurality of length adjusting rods are uniformly distributed on the outer edge of the split lining body in the circumferential direction, and the other ends of the length adjusting rods are abutted against the inner wall of the cylindrical workpiece to be processed, so that when the cylindrical workpiece is clamped, the cylindrical workpiece can be supported only by fixing the two ends of the mandrel, and the supporting device is not in direct contact with the cylindrical workpiece, so that the cylindrical workpiece is conveniently processed. In the invention, when the transition joint in the knob length adjusting rod is used, the thread turning directions of the threaded holes on the shaft sleeve and the stay bar are opposite, so that the stay bar and the shaft sleeve generate relative telescopic displacement (namely, the length adjustment of the length adjusting rod is realized) in the process of adjusting the knob transition joint, therefore, the invention can support cylindrical workpieces with different sizes, enhances the adaptability of the mandrel supporting device to the workpieces with different sizes, and simultaneously can realize the support of the workpieces with larger sizes by replacing the stay bars with different lengths.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced 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 based on these drawings without creative efforts.
FIG. 1 is a schematic view of a mandrel support assembly according to an embodiment of the present invention;
FIG. 2 is a schematic view of a split liner according to an embodiment of the present invention;
FIG. 3 is an enlarged view of a portion of a mandrel support apparatus provided in accordance with an embodiment of the present invention;
FIG. 4 is a structural diagram of a push rod according to an embodiment of the present invention;
FIG. 5 is a schematic view of a spindle support for clamping a cylindrical workpiece according to an embodiment of the present invention;
the symbols in the drawings represent the following meanings:
1-split lining body, 2-shaft sleeve, 3-transition joint, 4-stay bar, 5-ejector rod, 51-semispherical structure, 6-ejector block component, 61-ejector block body, 62-tolerance plate, 63-cover plate component, 7-tubular component, 8-connecting plate, 9-cylindrical workpiece, 10-mandrel, 11-pin hole and 12-pin shaft.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 is a schematic view illustrating an assembly of a mandrel supporting device according to an embodiment of the present invention, and as shown in fig. 1, the mandrel supporting device includes: mandrel 10, subdivision formula bushing 1 and a plurality of length adjustment pole, subdivision formula bushing 1 includes two half barrel structures, and subdivision formula bushing 1 presss from both sides through two half barrel structures and establishes on mandrel 10, and length adjustment pole one end is fixed on subdivision formula bushing 1, and a plurality of length adjustment poles include along 1 outward flange circumference evenly distributed of subdivision formula bushing, length adjustment pole: tubulose 7, axle sleeve 2, transition joint 3, vaulting pole 4, ejector pin 5 and kicking block subassembly 6, tubulose 7 and 1 fixed connection of subdivision formula lining body, axle sleeve 2 is installed in tubulose 7, 3 both ends of transition joint are equipped with the screw thread, 3 one end of transition joint passes through threaded connection with axle sleeve 2, threaded connection is passed through with the one end of vaulting pole 4 to the 3 other end of transition joint, axle sleeve 2, the screw hole that vaulting pole 4 and transition joint 3 are connected soon to opposite, threaded connection is passed through with the one end of ejector pin 5 to the other end of vaulting pole 4, the 5 other ends of ejector pin are connected with kicking block subassembly 6, kicking block subassembly 6 is used for offsetting with the inner wall of waiting to process cylindric work piece 9.
According to the embodiment of the invention, the split lining body 1 is clamped on the mandrel 10, the plurality of length adjusting rods are uniformly distributed on the outer edge of the split lining body 1 in the circumferential direction, and the other ends of the length adjusting rods are abutted against the inner wall of the cylindrical workpiece 9 to be processed, so that when the cylindrical workpiece 9 is clamped, the cylindrical workpiece 9 can be supported only by fixing the two ends of the mandrel 10, and the supporting device is not in direct contact with the cylindrical workpiece 9, so that the cylindrical workpiece 9 is conveniently processed. In the embodiment of the invention, when the transition joint 3 in the length adjusting rod is turned, because the thread turning directions of the threaded holes on the shaft sleeve 2 and the stay bar 4 are opposite, the relative telescopic displacement is generated between the stay bar 4 and the shaft sleeve 2 (namely, the length adjustment of the length adjusting rod) in the process of turning the transition joint 3, so that the invention can support cylindrical workpieces 9 with different sizes, the adaptability of the mandrel supporting device to the workpieces with different sizes is enhanced, and simultaneously, the support to the workpieces with larger sizes can be realized by replacing the stay bars 4 with different lengths, in addition, when the cylindrical workpieces 9 with different sizes are supported, the size of the mandrel 10 does not need to be equivalent to that of the cylindrical workpieces 9, thereby reducing the manufacturing cost of the mandrel 10.
Specifically, two split liners 1 are clamped on a mandrel 10, two split liners 1 are provided on the mandrel 10, the two split lining bodies 1 are provided with length adjusting rods which are abutted against the cylindrical workpiece 9, the two split lining bodies 1 can enhance the supporting effect of the mandrel supporting device on the cylindrical workpiece 9, in the present invention, the split lining body 1 can be clamped at any position of the mandrel 10, so that the mandrel supporting device can adapt to the cylindrical workpieces 9 with different lengths by adjusting the axial distance between the mandrels 10 of the two split lining bodies 1, if the length of the cylindrical workpiece 9 is larger, the distance between the two split liner 1 mandrels 10 in the axial direction can be increased, and if the length of the cylindrical workpiece 9 is small, the distance between the two split liner 1 mandrel 10 in the axial direction can be reduced, so that the invention can adapt to cylindrical workpieces 9 with different lengths, and the application range of the mandrel support device is enlarged.
Fig. 2 is a structure diagram of a split liner according to an embodiment of the present invention, and as shown in fig. 2, a connecting plate 8 is disposed between two adjacent tubular members 7. The tubular members 7 are circumferentially distributed on the outer edge of the split liner 1, every two adjacent tubular members 7 are connected through the connecting plate 8, the strength of the tubular members 7 is enhanced by the connecting plate 8, the stability of the split liner 1 and the tensile capacity of the tubular members 7 in the circumferential direction are improved, the connecting plates 8 can be rib plates welded at two ends of the tubular members 7, it should be noted that the connecting plates 8 arranged between the tubular members 7 are not limited to the rib plates, and any connecting plate 8 capable of improving the tensile capacity of the tubular members 7 in the circumferential direction can be used without limitation.
Fig. 3 is a partially enlarged view of a mandrel supporting device according to an embodiment of the present invention, as shown in fig. 3, a shaft sleeve 2 is sleeved in a tubular member 7, pin holes 11 are provided at contact positions of the shaft sleeve 2 and the tubular member 7, half of the pin holes 11 are provided in an outer wall of the shaft sleeve 2, the other half of the pin holes 11 are provided in an inner wall of the tubular member 7, and a pin 12 is inserted into the pin holes 11. Through set up pinhole 11 in tubulose 7 and 2 contact position of axle sleeve, and pinhole 11 is one-half in tubulose 7 and axle sleeve 2, insert round pin axle 12 in pinhole 11 simultaneously, can prevent when the length of 3 adjustment length adjusting levers of knob crossover sub, axle sleeve 2 takes place to rotate relative with tubulose 7 and hinders flexible removal between vaulting pole 4 and axle sleeve 2, and simultaneously, set up 12 cartridge of round pin axle (pinhole 11 and round pin axle 12 are interference fit within a definite time) and also can prevent that axle sleeve 2 from droing in tubulose 7 in pinhole 11, the stability of mandrel strutting arrangement has been improved.
Fig. 4 is a drawing illustrating a structure of a carrier rod according to an embodiment of the present invention, as shown in fig. 4, an end of the carrier rod 5 connected to the top block assembly 6 is a hemispherical structure 51, and a groove for accommodating the hemispherical structure 51 is formed on an end surface of the top block assembly 6 connected to the carrier rod 5. The hemispherical structure 51 on the ejector rod 5 is arranged in the groove of the ejector block component 6, and the matching mode of the groove and the hemispherical structure 51 enables the ejector block component 6 to incline at a certain angle along the hemispherical structure 51 on the ejector rod 5, so that the ejector block component 6 can adapt to form and position tolerance of a certain degree on the inner wall of the cylindrical workpiece 9, and the adaptability of the invention to different workpieces is enhanced.
Specifically, the kicking block subassembly 6 includes kicking block body 61, tolerance board 62 and apron piece 63, and tolerance board 62 adopts the fix with screw on a kicking block body 61 terminal surface, and tolerance board 62 offsets with the inner wall of cylindric work piece 9, is equipped with the round hole on the apron piece 63, and the round hole diameter is less than hemispherical structure 51 diameter, and apron piece 63 passes through the bolt and fixes hemispherical structure 51 in the recess. In the embodiment of the invention, the two ends of the top block body 61 are provided with the cover plate member 63 and the tolerance plate 62, wherein the cover plate member 63 and the tolerance plate 62 are both mounted on the top block body 61 through detachable fixing members, so that the top block assembly 6 can be maintained and replaced quickly, and the maintenance difficulty is reduced.
In the embodiment of the invention, the tolerance plate 62 is a polytetrafluoroethylene plate, the friction coefficient of the polytetrafluoroethylene plate is extremely low, and the polytetrafluoroethylene plate has good lubricating property, so that the tolerance plate 62 arranged on the top block body 61 has the effect of reducing damage to the cylindrical workpiece 9 in the clamping process, the tolerance plate 62 can adapt to a certain form and position tolerance on the inner wall of the cylindrical workpiece 9, the abrasion period of the cylindrical workpiece 9 can be reduced, the service life of the top block assembly 6 is prolonged, and the maintenance cost of the mandrel support device is reduced.
Preferably, the end surface of the top block body 61 connected with the tolerance plate 62 is a cylindrical surface, and the circular arc outer diameter of the cylindrical surface of the top block body 61 is the same as the inner hole diameter of the cylindrical workpiece 9. The surface of the top block body 61, which is in contact with the cylindrical workpiece 9, is set to be a cylindrical surface, and the arc outer diameter of the surface is the same as the diameter of the inner hole of the cylindrical workpiece 9, so that the top block assembly 6 is better attached to the cylindrical workpiece 9, the contact area between the top block assembly 6 and the cylindrical workpiece 9 is increased, and the supporting capacity of the mandrel supporting device is improved.
More specifically, both end surfaces of the mandrel 10 are provided with center holes based on the center line of the mandrel 10, and the diameter of the cross-sectional circle in the axial direction of the mandrel 10 is constant. The mandrel 10 is a non-stepped optical shaft with central holes at two ends, the central holes are formed in the two ends of the mandrel 10, the mandrel 10 is conveniently connected with a machine tool, the mandrel 10 is conveniently positioned, clamping efficiency is improved, meanwhile, the mandrel 10 is arranged to be a non-stepped shaft, and axial transposition installation of the split type lining body 1 is convenient, so that the mandrel supporting device can adapt to supporting of cylindrical workpieces 9 with different lengths.
As shown in figure 1, the two half-cylinder structures of the split lining body 1 are connected by adopting a detachable fastener, and the two half-cylinder structures of the split lining body 1 are connected by using the detachable fastener, so that the split lining body 1 can be detached and installed quickly.
In the spindle supporting device provided by the embodiment of the invention, the annular rubber ring is arranged between the split lining body 1 and the spindle, the friction force generated when the split lining body 1 and the spindle 10 are clamped can be increased by the annular rubber ring, so that the effect of torque transmission between the spindle 10 and the cylindrical workpiece 9 is enhanced, meanwhile, the abrasion speed of the spindle 10 and the split lining body 1 can be reduced, and the service cycle of the spindle supporting device is prolonged.
When the spindle support device provided by the embodiment of the invention is used for clamping a cylindrical workpiece 9, fig. 5 is a schematic view of the spindle support device provided by the embodiment of the invention for clamping the cylindrical workpiece, as shown in fig. 5, firstly two split type liners 1 are clamped on a spindle 10, a shaft sleeve 2 with a threaded hole is arranged in a tubular member 7 of the split type liners 1, then a stay bar 4 with threaded holes at two ends is connected with a transition joint 3 with threads at two ends, the other end of the transition joint 3 is connected with the shaft sleeve 2 arranged in the split type liners 1, the stay bar 4 is arranged on the spindle support device to support the cylindrical workpiece 9 with large pipe diameter and size, the stay bar 4, the shaft sleeve 2 and the transition joint 3 are connected by threads, the threaded directions of the threaded hole of the stay bar 4 connected with the transition joint 3 and the threaded hole of the shaft sleeve 2 connected with the transition joint 3 are opposite, therefore, the shaft sleeve 2 and the support rod 4 can relatively move in a telescopic mode through the knob transition joint 3, the support size range of the mandrel support device can be adjusted, and if the mandrel support device needs to adapt to the cylindrical workpiece 9 in a larger size range, the support of the cylindrical workpiece 9 in a larger size range can be adapted through replacing the support rod 4 or the transition joint 3. Meanwhile, the other end of the support rod 4 is connected with the ejector rod 5 through threads, and the size range supported by the mandrel supporting device can be finely adjusted in a small range. Then be connected the ejector pin 5 other end with kicking block subassembly 6, wherein the hemispherical structure 51 setting in the ejector pin 5 is in the recess of kicking block subassembly 6, when recess and hemispherical structure 51's cooperation mode made kicking block subassembly 6 support cylindric work piece 9 inner wall, the form and position tolerance of adaptation certain degree on the cylindric work piece 9 inner wall, use apron 63 to pack into kicking block body 61 and fix hemispherical structure 51 in the recess afterwards, install tolerance board 62 to cylindric work piece 9 on simultaneously, reduce the damage of clamping in-process to the work piece. When a cylindrical workpiece 9 with a large axial length needs to be clamped, the mandrel 10 can be replaced or the distance between the two split type lining bodies 1 can be adjusted to adapt to the cylindrical workpiece 9 with the large axial length.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. A spindle support for a cylindrical workpiece, the spindle support comprising: the split lining body comprises two half-cylinder structures, the split lining body is clamped on the mandrel through the two half-cylinder structures, one end of the length adjusting rod is fixed on the split lining body, the length adjusting rods are evenly distributed along the circumferential direction of the outer edge of the split lining body, and each length adjusting rod comprises: the pipe-shaped part is fixedly connected with the split lining body, the shaft sleeve is installed in the pipe-shaped part, threads are arranged at two ends of the transition joint, one end of the transition joint is in threaded connection with the shaft sleeve, the other end of the transition joint is in threaded connection with one end of the stay bar, the rotating directions of threaded holes formed by the shaft sleeve and the stay bar and connected with the transition joint are opposite, the other end of the stay bar is in threaded connection with one end of the ejector rod, the other end of the ejector rod is connected with the ejector block assembly, and the ejector block assembly is used for abutting against the inner wall of a cylindrical workpiece to be machined,
the length adjusting rods can selectively comprise the supporting rods with various lengths and the transition joints with various lengths, the length of the supporting rod of each length adjusting rod is the same, the length of the transition joint of each length adjusting rod is the same,
the axle sleeve cover is established in the tubulose spare, the axle sleeve with tubulose spare contact position is equipped with the pinhole, half of pinhole is seted up the axle sleeve outer wall, half of pinhole is seted up the tubulose spare inner wall, the round pin axle has been inserted in the pinhole.
2. The spindle support apparatus for a cylindrical workpiece according to claim 1, wherein two of said split liners are sandwiched on said spindle.
3. The apparatus as claimed in claim 1, wherein a connecting plate is provided between adjacent two of said tubular members.
4. The mandrel support apparatus for cylindrical workpieces of claim 1 wherein the end of said mandrel that is connected to said top block assembly is a hemispherical structure and a recess is provided in the end of said top block assembly that is connected to said mandrel for receiving said hemispherical structure.
5. The apparatus of claim 4, wherein the top block assembly comprises a top block body, a tolerance plate and a cover plate, the tolerance plate is fixed on an end face of the top block body by screws, the tolerance plate abuts against the inner wall of the cylindrical workpiece, a circular hole is formed in the cover plate, the diameter of the circular hole is smaller than that of the hemispherical structure, and the cover plate fixes the hemispherical structure in the groove through a bolt.
6. The spindle support device for cylindrical workpieces as set forth in claim 5, wherein the end surface of said top block body connected to said tolerance plate is a cylindrical surface, and the outer diameter of the circular arc of said top block body cylindrical surface is the same as the inner hole diameter of said cylindrical workpiece.
7. The apparatus as claimed in claim 1, wherein the mandrel has a central hole defined in both end surfaces thereof with reference to a center line of the mandrel, and the mandrel has a constant diameter in a cross-sectional circular shape in an axial direction.
8. The spindle support apparatus for cylindrical workpieces of claim 1 wherein the two half-cylinder structures of the split liner are connected with a removable fastener.
9. The spindle support apparatus for cylindrical workpieces of claim 1 wherein an annular rubber ring is disposed between said split liner and said spindle.
CN201711089479.0A 2017-11-08 2017-11-08 Spindle support for cylindrical workpieces Active CN107984278B (en)

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