Adjusting device and method suitable for machining outer circle of thin-wall slender shaft and machining method

Abstract

The invention discloses an adjusting device and method suitable for outer circle machining of a thin-wall slender shaft and a machining method, and belongs to the technical field of machining. The adjusting device suitable for machining the outer circle of the thin-wall slender shaft comprises a fixing frame and an adjustable limiting mechanism, when the adjustable limiting mechanism is installed on the fixing frame, the axis of the adjustable limiting mechanism is controlled to be collinear with a second center line of the fixing frame, and when the fixing frame is installed on a machine tool, the second center line of the fixing frame is collinear with the machining axis of the machine tool; furthermore, the adjustable limiting mechanism is provided with limiting assemblies which are symmetrical along the axis of the adjustable limiting mechanism, and the first center line of the inner hole of the thin-wall slender shaft penetrating through the adjustable limiting assemblies can be adjusted to be consistent with the machining axis of the machine tool. According to the adjusting device suitable for machining the outer circle of the thin-wall slender shaft, the first center line of the thin-wall slender shaft can be adjusted to be collinear with the machining axis of a machine tool, the outer circle outline of the machined thin-wall slender shaft is concentric with an inner hole, and the wall thickness difference is eliminated.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical processing, and in particular relates to an adjusting device and method and a processing method suitable for the outer circle processing of a thin-walled slender shaft. Background Art

[0002] Slender shafts refer to shafts with a length-to-diameter ratio greater than 25. Due to the large aspect ratio and poor rigidity of slender shafts, they are easily deformed during machining under the influence of cutting force, cutting heat, and vibration, resulting in machining errors such as straightness and cylindricity. The workpiece is prone to defects such as bending, waist drums, polygons, and bamboo joints. Especially for hollow, thin-walled slender shafts, the tool aspect ratio of the inner hole is large and the rigidity is relatively poor, which makes it easier to cause the center line of the inner hole to deviate, resulting in large wall thickness errors, affecting the static and dynamic balance performance of the shaft.

[0003] Hollow thin-walled slender shafts are generally clamped and positioned with the inner holes at both ends as the reference, and the outer circle is formed by turning, but the wall thickness consistency is poor. On the one hand, due to the lack of rigidity of the workpiece itself, gravity and clamping force can easily cause the workpiece to bend and deform, and the straightness of the outer circle itself after forming is poor. On the other hand, the inner hole of the workpiece is difficult to process and is prone to deflection. At this time, there is no effective way to use the inner hole as the reference when machining the outer circle, resulting in excessive wall thickness. Summary of the invention

[0004] In response to one or more of the above defects or improvement needs in the prior art, the present invention provides an adjustment device and method and a processing method suitable for the outer circle processing of a thin-walled slender shaft, wherein the first center line of the inner hole of the thin-walled slender shaft is adjusted based on the processing axis of the machine tool to ensure that the first center line of the inner hole of the thin-walled slender shaft is colinear with the processing axis of the machine tool, so that the outer circle contour of the thin-walled slender shaft 100 after processing is concentric with the inner hole, thereby eliminating the wall thickness difference.

[0005] To achieve the above object, the present invention provides an adjustment device suitable for the outer circle machining of a thin-walled slender shaft, which is arranged between two clamping mechanisms of a machine tool and is used to adjust the position of the first center line of the inner hole of the thin-walled slender shaft, comprising: A fixing frame, wherein a limiting hole is provided on the fixing frame, and the fixing frame can be mounted on the machine tool so that a second center line of the limiting hole is collinear with a machining axis of the machine tool; An adjustable limit mechanism, the adjustable limit mechanism includes an outer sleeve, an inner sleeve and an adjusting component, the outer sleeve can be installed in the limit hole so that the axis of the outer sleeve is colinear with the second center line, the inner sleeve is coaxially embedded in the outer sleeve, and the inner sleeve can rotate around the second center line relative to the outer sleeve; the adjusting component is provided at both ends of the inner sleeve, and at least two groups of limit components are provided on the adjusting component, each group of the limit components is symmetrically arranged along the axis of the inner sleeve, and each of the limit components can be moved radially along the limit hole, and is used to adjust the first center line of the inner hole of the thin-walled slender shaft passing through the inner sleeve to be consistent with the machining axis of the machine tool according to the theoretical wall thickness and actual wall thickness of the thin-walled slender shaft.

[0006] As a further improvement of the present invention, a connecting line of at least one group of the limiting components on the adjusting member is perpendicular to a connecting line of another group of the limiting components.

[0007] As a further improvement of the present invention, a plurality of groups of limit assemblies symmetrical along the axis of the inner sleeve are evenly arranged on the adjusting member.

[0008] As a further improvement of the present invention, the adjusting member is provided with a through hole, one end of the adjusting member is detachably connected to the inner sleeve so that the axis of the through hole is coaxial with the axis of the inner sleeve, and the other end of the adjusting member is provided with a mounting hole for mounting the limit assembly, and the limit assembly can move along the mounting hole.

[0009] As a further improvement of the present invention, bearing mounting positions are provided at both ends of the outer sleeve and the inner sleeve to sleeve bearings, and a first cover plate for pressing the bearing is also provided at the end of the outer sleeve.

[0010] As a further improvement of the present invention, the fixing frame includes a base and a second cover plate.

[0011] In a second aspect of the present invention, there is also provided an adjustment method applicable to the outer circle machining of thin-walled slender shafts. The machining positioning method is implemented by using the above-mentioned adjustment device applicable to the outer circle machining of thin-walled slender shafts, and comprises the following steps: S1: sleeve at least one of the adjustable limiting mechanisms on the thin-walled elongated shaft; S2: Clamping the two ends of the thin-walled elongated shaft on a machine tool; S3: installing a fixing frame on a machine tool, and installing an outer sleeve of the adjustable limiting mechanism in a limiting hole of the fixing frame; S4: measuring the actual wall thickness of the thin-walled elongated shaft corresponding to each group of the limit components, and marking each thickness error on each measuring point of the outer circle of the thin-walled elongated shaft according to the theoretical wall thickness; S5: According to the wall thickness errors, the corresponding limit assemblies are adjusted to move radially to adjust the first center line of the inner hole of the thin-walled slender shaft to be colinear with the machining axis of the machine tool.

[0012] As a further improvement of the present invention, step S5 includes: S501: placing the dial indicator radially against the measuring point of the thin-walled elongated shaft and returning it to zero; S502: Adjust the limit assembly relative to the measuring point so that it moves radially to press against the outer circle of the thin-walled slender shaft at that location until the reading of the dial indicator is consistent with the thickness error marked on the measuring point, and adjust the limit assembly relative to the limit assembly to move radially to limit the radial movement of the measuring point.

[0013] As a further improvement of the present invention, step S5 further includes: S503: using S501 to S502 to adjust the measuring points corresponding to the groups of limit assemblies provided on the same adjusting member, so as to complete the adjustment of the adjusting member corresponding to the center position of the inner hole of the first end face of the thin-walled elongated shaft; S504: Using S501 to S502, adjust the groups of measuring points corresponding to the groups of limit assemblies provided on another adjusting member, so as to complete the adjustment of the adjusting member corresponding to the center position of the inner hole of the second end face of the thin-walled elongated shaft.

[0014] In a second aspect of the present invention, there is also provided a processing method suitable for the outer circle processing of thin-walled slender shafts, which is implemented by using the above-mentioned adjustment device suitable for the outer circle processing of thin-walled slender shafts, and is characterized in that it includes the following process: (1) Using the adjustment method for machining the outer circle of a thin-walled, slender shaft as claimed in the claim, the first center line of the inner hole of the thin-walled, slender shaft is adjusted to be colinear with the machining axis of the machine tool, and the outer circle of the thin-walled, slender shaft located outside the adjustment device for machining the outer circle of a thin-walled, slender shaft is machined; (2) removing the adjustment device suitable for machining the outer diameter of a thin-walled slender shaft and moving it to a position where the outer diameter of the thin-walled slender shaft has been machined; (3) Using the adjustment method suitable for the outer circle machining of a thin-walled slender shaft as described in any one of claims 7 to 9, the first center line of the inner hole of the thin-walled slender shaft is again adjusted to be colinear with the machining axis of the machine tool, and the outer circle of the thin-walled slender shaft at the location where the adjustment device suitable for the outer circle machining of a thin-walled slender shaft described in step (1) is located is processed.

[0015] The above-mentioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0016] In general, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects: (1) The adjusting device of the present invention, which is suitable for the outer circle processing of thin-walled slender shafts, comprises a fixing frame and an adjustable limiting mechanism, wherein the adjustable limiting mechanism comprises an outer sleeve, an inner sleeve and an adjusting member, wherein the inner sleeve is arranged coaxially with the outer sleeve, and when the outer sleeve is installed in the limiting hole of the fixing frame, the axis of the outer sleeve is collinear with the second center line of the limiting hole, and when the fixing frame is installed on the machine tool, the second center line of the fixing frame is consistent with the processing axis of the machine tool, so that the processing axis of the machine tool is collinear with the axis of the inner sleeve. At this time, the limiting components on the adjusting member arranged at both ends of the inner sleeve are used to adjust the first center line of the inner hole of the thin-walled slender shaft penetrating the inner sleeve to be consistent with the axis of the inner sleeve according to the theoretical wall thickness and actual wall thickness of the thin-walled slender shaft, so that the first center line is consistent with the processing axis of the machine tool. The adjusting device suitable for the outer circle processing of thin-walled slender shafts of the present invention can, on the one hand, adjust the wall thickness difference of the thin-walled slender shaft to the outer circle, that is, realize that the outer circle runout is consistent with the wall thickness difference, ensure that the first center line of the inner hole is colinear with the processing axis of the machine tool, realize that the outer circle contour of the thin-walled slender shaft after processing is concentric with the inner hole, and eliminate the wall thickness difference; on the other hand, the adjusting device provides radial support for the thin-walled slender shaft clamped between the two clamping mechanisms of the machine tool, increases its rigidity, and can effectively reduce the flexural deformation of the thin-walled slender shaft.

[0017] (2) The adjusting device of the present invention is suitable for the external cylindrical processing of thin-walled slender shafts. By arranging the limit components on the adjusting member 23 so that the connecting line of at least one group of limit components is perpendicular to the connecting line of another group of limit components, the center position of the inner hole of the corresponding end face of the thin-walled slender shaft can be adjusted in the direction of the two mutually perpendicular groups of limit components. The center of the inner hole of the end face can be adjusted to the processing axis of the machine tool as soon as possible, thereby improving the adjustment efficiency of the center position of the inner hole of the end face of the thin-walled slender shaft corresponding to the two groups of limit components.

[0018] (3) The adjusting device of the present invention is suitable for the outer circle processing of thin-walled slender shafts. By evenly arranging multiple groups of limit assemblies symmetrical along the axis of the inner sleeve on the adjusting component, the multiple groups of limit assemblies can adjust the inner hole center of the thin-walled slender shaft corresponding to the end face from multiple directions to improve the adjustment accuracy of the inner hole center of the end face.

[0019] (4) The adjustment method for the outer circle machining of a thin-walled, slender shaft of the present invention adjusts the first center line of the inner hole of the thin-walled, slender shaft to be consistent with the machining axis of the machine tool through the above-mentioned adjustment device for the outer circle machining of a thin-walled, slender shaft, so as to facilitate the machining of the outer circle of the thin-walled, slender shaft.

[0020] (5) The processing method suitable for the outer circle processing of thin-walled slender shafts of the present invention is realized by using the above-mentioned adjustment device suitable for the outer circle processing of thin-walled slender shafts. First, the above-mentioned adjustment method suitable for the outer circle processing of thin-walled slender shafts adjusts the first center line of the inner hole of the thin-walled slender shaft to be consistent with the processing axis of the machine tool, and then the outer circle processing of the thin-walled slender shaft located outside the adjustment device is performed. Then, the device of the present invention is moved to other parts and the first center line of the inner hole of the thin-walled slender shaft is readjusted, and the outer circle processing of the remaining unprocessed parts of the thin-walled slender shaft is performed. The outer circle contour of the wall thickness of the thin-walled slender shaft processed by this method is concentric with the inner hole, and the wall thickness is uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 is a cross-sectional view of an adjustable limiting mechanism in an embodiment of the present invention; Figure 2 are a front view and a side view of a fixing frame in an embodiment of the present invention; Figure 3 is a cross-sectional view of an adjusting member in an embodiment of the present invention; Figure 4 Schematic diagram of adjustment of the thin-walled slender shaft in an embodiment of the present invention.

[0023] In all the drawings, the same figure marks represent the same technical features, specifically: 1. fixing frame; 11. limiting hole; 111. second center line; 12. base; 13. second cover plate; 2. adjustable limiting mechanism; 21. outer sleeve; 22. inner sleeve; 23. adjusting member; 231. through hole; 232. mounting hole; 24. limiting assembly; 25. bearing; 26. first cover plate; 100. thin-walled slender shaft; 101. first center line; 200. adjusting device suitable for outer circle processing of thin-walled slender shaft; 300. clamping mechanism. DETAILED DESCRIPTION In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0028] Example: Since the inner hole of the thin-walled slender shaft 100 is difficult to process and is prone to deflection, and the thin-walled slender shaft 100 itself has insufficient rigidity and is easily bent and deformed under the action of gravity, its outer circle cannot be effectively processed based on the first center line 101 of the inner hole. Therefore, the adjustment device suitable for the outer circle processing of the thin-walled slender shaft in the preferred embodiment of the present invention adjusts the first center line 101 of the inner hole of the thin-walled slender shaft 100 based on the processing axis of the machine tool to reduce the error between the first center line 101 and the processing axis of the machine tool.

[0029] The adjustment device suitable for the outer cylindrical processing of a thin-walled slender shaft in the preferred embodiment of the present invention is arranged between two clamping mechanisms 300 of a machine tool, and is used to adjust the position of the first center line 101 of the inner hole of the thin-walled slender shaft 100 during the processing of the outer cylindrical surface of the thin-walled slender shaft 100, and includes a fixing frame 1 and an adjustable limiting mechanism 2.

[0030] Among them, Figure 2 As shown, Figure 2 The left side is a projection diagram of the fixing frame parallel to the second center line 111. Figure 2 The right side is a projection of the fixing frame perpendicular to the second center line 111. The fixing frame 1 is provided with a limit hole 11. The fixing frame 1 can be installed on the machine tool so that the second center line 111 of the limit hole 11 is coaxial with the machining axis of the machine tool; Figure 1 As shown, the adjustable limit mechanism 2 includes an outer sleeve 21, an inner sleeve 22 and an adjusting member 23. The outer sleeve 21 can be installed in the limit hole 11 so that the axis of the outer sleeve 21 is coaxial with the second center line 111 of the limit hole 11, and the inner sleeve 22 is coaxially embedded in the outer sleeve 21, and the inner sleeve 22 can rotate around the second center line relative to the outer sleeve 21; adjusting members 23 are provided at both ends of the inner sleeve 22, and at least two groups of limit components 24 are provided on the adjusting member 23, each group of limit components 24 is symmetrically arranged along the axis of the inner sleeve 22, and each limit component 24 can be moved radially along the limit hole 11, and is used to adjust the first center line 101 of the thin-walled slender shaft 100 passing through the inner sleeve 22 to be consistent with the processing axis of the machine tool according to the theoretical wall thickness and actual wall thickness of the thin-walled slender shaft 100.

[0031] In this embodiment, the inner sleeve 22 is coaxial with the outer sleeve 21, and the axis of the outer sleeve 21 is collinear with the second center line 111 when the outer sleeve 21 is installed in the limiting hole 11 of the fixing frame 1. When the fixing frame 1 is installed on the machine tool, the second center line 111 of the fixing frame 1 is consistent with the processing axis of the machine tool, so that the processing axis of the machine tool is collinear with the axis of the inner sleeve 22. At this time, the first center line 101 of the inner hole of the thin-walled slender shaft 100 passing through the inner sleeve 22 is adjusted based on the axis of the inner sleeve 22, which is equivalent to adjusting the first center line 101 of the inner hole of the thin-walled slender shaft 100 based on the processing axis of the machine tool.

[0032] Specifically, adjusting components 23 are provided at both ends of the inner sleeve 22, and at least two groups of limit assemblies 24 symmetrical along the axis of the inner sleeve 22 are provided on the adjusting components 23. According to the theoretical wall thickness and the actual wall thickness of the thin-walled slender shaft 100, the wall thickness error is obtained. The limit assemblies 24 can adjust the limit assemblies 24 to move in the radial direction to push the end face of the corresponding thin-walled slender shaft 100 to move in the radial direction of the limit assemblies to adjust the wall thickness error corresponding to the radial movement of the limit assemblies, thereby adjusting the center position of the inner hole of the thin-walled slender shaft 100 at the limit assemblies, and the limit assemblies 24 opposite to the limit assemblies 24 can move in the radial direction. Move to limit the movement of the end face along the direction where the set of limit components are located; further, if the center position of the inner hole in the direction of the other set of limit components on the end face does not need to be adjusted, the center position of the inner hole corresponding to the end face has been adjusted, and the other set of limit components 24 is moved radially to limit the movement of the outer circle of the end face along the direction where the other set of limit components 24 are located; otherwise, the center position of the inner hole in the direction of the other set of limit components on the end face also needs to be adjusted in accordance with the adjustment method of the previous set of limit components to complete the adjustment of the center position of the inner hole of the end face. In addition, at least two sets of limit components on the adjustment member 23 at the other end of the inner sleeve 22 are adjusted in the same way to complete the center position of the inner hole of the other end face of the thin-walled slender shaft 100. The inner hole center position of the end face of the thin-walled slender shaft 100 corresponding to the two ends of the inner sleeve 22 is adjusted to the processing axis of the machine tool, that is, the adjustment of the first center line 101 of the inner hole of the thin-walled slender shaft 100 by the adjustment device is completed, and then the part of the thin-walled slender shaft 100 with the first center line 101 adjusted is subjected to external turning processing, so that the outer circle contour of this part of the thin-walled slender shaft 100 is concentric with the inner hole and the wall thickness is uniform.

[0033] Preferably, the fixing frame 1 includes a base 12 and a second cover plate 13, the base 12 and the second cover plate 13 jointly define a limit hole 11, and when the base 12 is mounted on a machine tool, the second center line of the limit hole 11 is colinear with the machining axis of the machine tool. More specifically, the base 12 is composed of a bottom plate, a support frame and a semi-ring, and the second cover plate 13 and the semi-ring define a limit hole 11 for mounting the adjustable limit mechanism 2.

[0034] Preferably, the connection line of at least one group of limiting components 24 on the adjusting member 23 is perpendicular to the connection line of another group of limiting components 24 .

[0035] In this preferred embodiment, by adjusting the inner hole center of the corresponding end face of the thin-walled slender shaft 100 in the direction of two sets of limit assemblies 24 that are perpendicular to each other, the inner hole center of the end face can be adjusted to the processing axis of the machine tool as soon as possible, thereby improving the adjustment efficiency of the inner hole center of the end face of the thin-walled slender shaft 100 corresponding to the two sets of limit assemblies.

[0036] Preferably, multiple groups of limit assemblies 24 symmetrical along the axis of the inner sleeve 22 are evenly arranged on the adjustment member 23. The multiple groups of limit assemblies 24 can adjust the inner hole center of the thin-walled slender shaft 100 of the corresponding end faces from multiple directions to improve the adjustment accuracy of the inner hole center of the end face.

[0037] Exemplarily, four groups of limit assemblies 24 are provided on the adjusting member 23 , and the angle formed between adjacent limit assemblies 24 and the axis of the inner sleeve 22 is 45°.

[0038] Preferably, if Figure 3 As shown, the adjusting member 23 is provided with a through hole 231, and one end of the adjusting member 23 is detachably connected to the inner sleeve 22, so that the axis of the through hole 231 is coaxial with the axis of the inner sleeve 22, and the other end of the adjusting member 23 is provided with a mounting hole 232 for mounting the limit assembly 24, and the limit assembly 24 can move along the mounting hole 232.

[0039] In this preferred embodiment, by coaxially connecting the adjusting member 23 and the inner sleeve 22, the limiting assembly 24 is symmetrically arranged along the axis of the through hole 231 of the adjusting member 23, thereby ensuring that the limiting assembly 24 is distributed along the axis of the inner sleeve 22. At the same time, it can also ensure that the adjustment reference of the thin-walled slender shaft 100 is always colinear with the machining axis of the machine tool, thereby ensuring the adjustment accuracy of the device.

[0040] Preferably, a thread is provided in the mounting hole 232 , and the limiting assembly 24 is an adjusting bolt, which can move along the mounting hole 232 to adjust its extended length.

[0041] Preferably, the adjusting member 23 is connected to the inner sleeve 22 by threads. Specifically, an outer thread is provided on the outer side of the end of the adjusting member 23, and an inner thread matching the outer thread is provided on the inner side of the end of the inner sleeve 22, and the two can be engaged together. Further preferably, the length of the outer thread is not greater than the length of the inner thread, and the two have a sufficient engagement length, and the inner thread of the inner sleeve 22 can also pass through the entire inner wall.

[0042] More preferably, if Figure 1 As shown, bearing mounting positions are provided at both ends of the outer sleeve 21 and the inner sleeve 22 to sleeve the bearing 25 , and a first cover plate 26 for pressing the bearing 25 is also provided at the end of the outer sleeve 21 .

[0043] In this embodiment, the bearing 25 supports the inner sleeve 22 when the inner sleeve 22 rotates with the thin-walled slender shaft 100, and can reduce the friction coefficient between the inner sleeve 22 and the outer sleeve 21, and ensure the rotation accuracy of the inner sleeve 22. In addition, a first cover plate 26 is provided at the end of the outer sleeve 21 to press the bearing 25 in the bearing installation position formed by the outer sleeve 21 and the inner sleeve 22, which can prevent the bearing 25 from falling off and prevent the outer sleeve 21 and the inner sleeve 22 from relative displacement along the axial direction, so that the outer sleeve 21 and the inner sleeve 22 are tightly nested together.

[0044] Preferably, the first cover plate 26 may be fixedly connected to the end of the outer sleeve 21 by means of bolts.

[0045] Preferably, the outer circumference of the outer sleeve 21 is provided with radial holes for adding bearing lubricating oil to facilitate maintenance of the bearing 25 .

[0046] Preferably, the length of the adjustment device suitable for the outer circle processing of thin-walled slender shafts of the present invention is in the range of 90mm to 160mm. Therefore, when adjusting the first center line 101 of the inner hole of a thin-walled slender shaft with a longer length, multiple adjustment devices of the present invention can be arranged along its length direction for adjustment and support.

[0047] In actual use, the present invention also provides an adjustment method suitable for the outer circle processing of thin-walled slender shafts, which is implemented by using the above-mentioned adjustment device suitable for the outer circle processing of thin-walled slender shafts, and includes the following process: S1: at least one adjustable limit mechanism 2 is sleeved on the thin-walled elongated shaft 100; S2: Clamping the two ends of the thin-walled elongated shaft 100 on the clamping mechanism 300 of the machine tool; S3: Install the fixing frame 1 on the machine tool, and install the outer sleeve 21 of the adjustable limiting mechanism 2 in the limiting hole 11 of the fixing frame 1; S4: measuring the actual wall thickness of the thin-walled elongated shaft 100 corresponding to each set of stopper components 24, and marking each thickness error on each measuring point on the outer circle of the thin-walled elongated shaft 100 according to the theoretical wall thickness; S5: According to the wall thickness errors, the corresponding limit assemblies 24 are adjusted to move radially, so as to adjust the first center line 101 of the inner hole of the thin-walled slender shaft 100 to be colinear with the machining axis of the machine tool.

[0048] Further preferably, step S5 comprises: S501: placing the dial indicator radially against the measuring point of the thin-walled elongated shaft and returning it to zero; S502: Adjust the limit assembly relative to the measuring point so that it moves radially to press against the outer circle of the thin-walled slender shaft at that location until the reading of the dial indicator is consistent with the thickness error marked on the measuring point, and adjust the limit assembly relative to the limit assembly to move radially to limit the radial movement of the measuring point.

[0049] Further preferably, step S5 further includes: S503: Using S501 to S502, the measuring points corresponding to the groups of limit assemblies 24 provided on the same adjusting member 23 are adjusted to complete the adjustment of the inner hole center position of the first end surface of the thin-walled elongated shaft 100 corresponding to the adjusting mechanism 23; S504: Using S501 to S502, the groups of measuring points corresponding to the groups of limit assemblies 24 provided on the other adjusting member 23 are adjusted to complete the adjustment of the inner hole center position of the second end surface of the thin-walled slender shaft 100 corresponding to the other adjusting mechanism 23 .

[0050] Further preferably, between step S503 and step S504, the method further includes: The actual wall thickness of the thin-walled elongated shaft 100 corresponding to each set of limit assemblies 24 on another adjustment mechanism 23 is remeasured, and the remeasured thickness error is marked on several measuring points on the outer circle of the thin-walled elongated shaft 100 corresponding to each limit assemblies 24 according to the theoretical wall thickness.

[0051] The adjustment of the center position of the inner hole at the first circle in step S503 causes disturbance to the actual position of the second circle corresponding to the adjustment mechanism. Therefore, in this embodiment, adding this step between step S503 and step S504 can make the adjustment of the center position of the second circle in step S504 more precise.

[0052] In practical application, the present invention also provides a processing method suitable for the outer circle processing of thin-walled slender shafts, comprising the following process: (1) Using the above-mentioned adjustment method for machining the outer circle of a thin-walled slender shaft, the first center line 101 of the inner hole of the thin-walled slender shaft is adjusted to be colinear with the machining axis of the machine tool, and the outer circle of the thin-walled slender shaft located outside the adjustment device for machining the outer circle of a thin-walled slender shaft is machined; (2) Remove the adjustment device suitable for machining the outer diameter of the thin-walled slender shaft and move it to the part where the outer diameter of the thin-walled slender shaft has been machined; (3) Using the adjustment method suitable for the outer circle machining of a thin-walled slender shaft described in any one of claims 7 to 9, the first center line 101 of the inner hole of the thin-walled slender shaft is again adjusted to be colinear with the machining axis of the machine tool, and the outer circle of the thin-walled slender shaft at the location of the adjustment device suitable for the outer circle machining of a thin-walled slender shaft described in step (1) is processed.

[0053] In a specific preferred embodiment, Figure 4 As shown, the process of adjusting the first center line 101 of the inner hole of the thin-walled slender shaft 100 and the process of machining the outer circle of the thin-walled slender shaft 100 by using the adjusting device 200 is as follows: The two adjustable limit mechanisms 2 are sleeved on the thin-walled slender shaft 100, the two ends of the thin-walled slender shaft 100 are clamped on the clamping mechanism 300 of the machine tool, the two adjustable limit mechanisms 2 are moved to the third division of the thin-walled slender shaft 100, the two fixing frames 1 are installed on the corresponding machine tool positions, and the outer shaft sleeves 21 of the two adjustable limit mechanisms 2 are installed in the limiting holes 11 of the fixing frames 1, and the installation of the two adjusting devices 200 is completed; Further, an ultrasonic thickness gauge is used to measure the wall thickness of the thin-walled slender shaft 100 at the four end faces of the two adjustable limit mechanisms, and multiple measuring points corresponding to the limit components 24 are selected for each end face, and the thickness errors on each end face are marked on the measuring points of the outer circle of the thin-walled slender shaft 100, and the limit components 24 corresponding to the four end faces of the two adjustable limit mechanisms are adjusted from the left side to the right side (or from the right side to the left side), and the inner hole center positions of the thin-walled slender shaft 100 corresponding to the four end faces are adjusted to the machining axis of the machine tool in turn. At this time, the first center line 101 of the inner hole of the thin-walled slender shaft 100 is adjusted, and the L1, L2, and L3 sections can be turned; Next, the two adjusting devices 200 are removed and shifted in turn, and the first center line 101 of the inner hole is readjusted to turn the outer circle of the area where the two adjusting devices 200 were originally located. For example, the fixing frame 1 of the adjusting device 200 on the left is removed and the limiting assembly 24 thereon is loosened, and its adjustable limiting mechanism 2 is moved to the right to the L2 section, and the fixing frame 1 is reinstalled. The adjusting device 200 is used to adjust the inner hole center position of the thin-walled slender shaft 100 corresponding to the two ends after the movement again. The adjusting device 200 on the right can also be moved and readjusted in the same way. Finally, the outer circle of the area where the two adjusting devices 200 were originally located is turned to complete the outer circle processing of the thin-walled slender shaft 100.

[0054] The adjusting device suitable for the outer circle processing of the thin-walled slender shaft of the present invention can, on the one hand, adjust the wall thickness difference of the thin-walled slender shaft 100 to the outer circle, that is, realize that the outer circle runout is consistent with the wall thickness difference, ensure that the first center line 101 of the inner hole is colinear with the processing axis of the machine tool, and realize that the outer circle contour of the thin-walled slender shaft 100 after processing is concentric with the inner hole, eliminating the wall thickness difference; on the other hand, the adjusting device provides radial support for the thin-walled slender shaft 100 clamped between the two clamping mechanisms 300 of the machine tool, increases its rigidity, and can effectively reduce the flexural deformation of the thin-walled slender shaft 100.

[0055] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An adjusting device suitable for the outer circle machining of a thin-walled slender shaft, which is arranged between two clamping mechanisms of a machine tool and is used to adjust the position of the first center line of the inner hole of the thin-walled slender shaft, characterized in that: include: A fixing frame, wherein a limiting hole is provided on the fixing frame, and the fixing frame can be mounted on the machine tool so that a second center line of the limiting hole is collinear with a machining axis of the machine tool; An adjustable limit mechanism, the adjustable limit mechanism includes an outer sleeve, an inner sleeve and an adjusting component, the outer sleeve can be installed in the limit hole so that the axis of the outer sleeve is colinear with the second center line, the inner sleeve is coaxially embedded in the outer sleeve, and the inner sleeve can rotate around the second center line relative to the outer sleeve; the adjusting component is provided at both ends of the inner sleeve, and at least two groups of limit components are provided on the adjusting component, each group of the limit components is symmetrically arranged along the axis of the inner sleeve, and each of the limit components can be moved radially along the limit hole, and is used to adjust the first center line of the inner hole of the thin-walled slender shaft passing through the inner sleeve to be consistent with the machining axis of the machine tool according to the theoretical wall thickness and actual wall thickness of the thin-walled slender shaft.

2. The adjusting device suitable for the outer circle machining of thin-walled slender shaft according to claim 1 is characterized in that: The connection line of at least one group of the limiting components on the adjusting member is perpendicular to the connection line of another group of the limiting components.

3. The adjusting device suitable for the outer circle machining of thin-walled slender shaft according to claim 1, characterized in that: The regulating component is evenly provided with a plurality of groups of limit assemblies symmetrical along the axis of the inner sleeve.

4. The adjusting device suitable for the outer circle machining of thin-walled slender shaft according to any one of claims 1 to 3, characterized in that: The adjusting member is provided with a through hole, one end of the adjusting member is detachably connected to the inner sleeve so that the axis of the through hole is coaxial with the axis of the inner sleeve, and the other end of the adjusting member is provided with a mounting hole for mounting the limit assembly, and the limit assembly can move along the mounting hole.

5. The adjusting device suitable for the outer circle machining of thin-walled slender shaft according to any one of claims 1 to 3, characterized in that: Both ends of the outer sleeve and the inner sleeve are provided with bearing mounting positions for sleeve-mounting bearings, and the end of the outer sleeve is also provided with a first cover plate for pressing the bearings.

6. The adjusting device suitable for the outer circle machining of thin-walled slender shaft according to any one of claims 1 to 3, characterized in that: The fixing frame comprises a base and a second cover plate.

7. The adjustment method is suitable for the outer circle processing of thin-walled slender shafts, characterized in that: The processing positioning method is implemented by using the adjustment device suitable for the outer circle processing of thin-walled slender shafts according to any one of claims 1 to 6, and comprises the following steps: S1: sleeve at least one of the adjustable limiting mechanisms on the thin-walled elongated shaft; S2: Clamping the two ends of the thin-walled elongated shaft on a machine tool; S3: installing a fixing frame on a machine tool, and installing an outer sleeve of the adjustable limiting mechanism in a limiting hole of the fixing frame; S4: measuring the actual wall thickness of the thin-walled elongated shaft corresponding to each group of the limit components, and marking each thickness error on each measuring point of the outer circle of the thin-walled elongated shaft according to the theoretical wall thickness; S5: According to the wall thickness errors, the corresponding limit assemblies are adjusted to move radially to adjust the first center line of the inner hole of the thin-walled slender shaft to be colinear with the machining axis of the machine tool.

8. The adjustment method for the outer circle machining of thin-walled slender shafts according to any one of claim 6, characterized in that: Step S5 includes: S501: placing the dial indicator radially against the measuring point of the thin-walled elongated shaft and returning it to zero; S502: Adjust the limit assembly relative to the measuring point so that it moves radially to press against the outer circle of the thin-walled slender shaft at that location until the reading of the dial indicator is consistent with the thickness error marked on the measuring point, and adjust the limit assembly relative to the limit assembly to move radially to limit the radial movement of the measuring point.

9. The adjustment method for the outer circle machining of thin-walled slender shafts according to any one of claim 7, characterized in that: Step S5 also includes: S503: using S501 to S502 to adjust the measuring points corresponding to the groups of limit assemblies provided on the same adjusting member, so as to complete the adjustment of the adjusting member corresponding to the center position of the inner hole of the first end face of the thin-walled elongated shaft; S504: Using S501 to S502, adjust the groups of measuring points corresponding to the groups of limit assemblies provided on another adjusting member, so as to complete the adjustment of the adjusting member corresponding to the center position of the inner hole of the second end face of the thin-walled elongated shaft.

10. A processing method suitable for machining the outer circle of a thin-walled slender shaft, which is implemented by using the adjustment device suitable for machining the outer circle of a thin-walled slender shaft according to any one of claims 1 to 6, characterized in that: The process includes the following: (1) Using the adjustment method for machining the outer circle of a thin-walled, slender shaft according to any one of claims 7 to 9, the first center line of the inner hole of the thin-walled, slender shaft is adjusted to be collinear with the machining axis of the machine tool, and the outer circle of the thin-walled, slender shaft located outside the adjustment device for machining the outer circle of a thin-walled, slender shaft is machined; (2) removing the adjustment device suitable for machining the outer diameter of a thin-walled slender shaft and moving it to a position where the outer diameter of the thin-walled slender shaft has been machined; (3) Using the adjustment method suitable for the outer circle machining of a thin-walled slender shaft as described in any one of claims 7 to 9, the first center line of the inner hole of the thin-walled slender shaft is again adjusted to be colinear with the machining axis of the machine tool, and the outer circle of the thin-walled slender shaft at the location where the adjustment device suitable for the outer circle machining of a thin-walled slender shaft described in step (1) is located is processed.

Images