Turning and rolling tool for elongated shafts and method of machining thereof

Abstract

The application belongs to the technical field of machining, and discloses a turning and rolling cutter for an elongated shaft and a machining method thereof. The turning and rolling cutter for the elongated shaft comprises a cutter holder body, a turning cutter assembly and a rolling cutter assembly. The cutter holder body has a central through hole for penetrating the elongated shaft. The turning cutter assembly is slidably arranged on the cutter holder body and can slide close to or away from the central through hole. A plurality of rolling cutter assemblies are arranged around the central through hole and are slidably arranged on the cutter holder body, and the rolling cutter assemblies can slide close to or away from the central through hole. The turning and rolling cutter can realize turning and rolling separately or simultaneously by arranging the turning cutter assembly and the rolling cutter assembly around the central through hole, thereby solving the problem of low machining precision caused by repeated clamping and fixing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of machining, in particular to a turning and rolling tool for an elongated shaft and a machining method thereof. BACKGROUND

[0002] An elongated shaft generally refers to a shaft with a length-diameter ratio greater than 25. The elongated shaft is difficult to machine, mainly because of its poor rigidity. Deformation and vibration in the turning process will be concentrated on the elongated shaft, thereby causing bending deformation and vibration of the elongated shaft, affecting the machining precision and surface quality. Under the action of cutting heat, the elongated shaft is prone to thermal expansion and part length change.

[0003] For the problem of bending deformation of the elongated shaft, the influence of thermal deformation can be reduced by rolling machining. However, in the prior art, rolling and turning are two independent machining methods, and cannot be simultaneously rolled during turning. Moreover, the elongated shaft needs to be fixed and clamped multiple times for turning and rolling, thereby affecting the machining precision. Turning and rolling are performed separately, and the machining efficiency is low. SUMMARY

[0004] A first object of the present application is to provide a turning and rolling tool for an elongated shaft, so as to solve the problem of low machining precision caused by the fact that turning and rolling cannot be simultaneously clamped and fixed at one time.

[0005] A second object of the present application is to provide a machining method for an elongated shaft, so as to solve the problems of one-time clamping of the elongated shaft, simultaneous turning and rolling, and low machining precision.

[0006] To achieve the first object, the present application adopts the following technical solutions:

[0007] The turning and rolling tool for the elongated shaft comprises:

[0008] A tool holder body having a central through hole for passing the elongated shaft;

[0009] A turning tool assembly for turning the elongated shaft; the turning tool assembly is slidably arranged on the tool holder body, and the turning tool assembly can slide close to or away from the central through hole;

[0010] A rolling tool assembly for rolling the elongated shaft; the rolling tool assembly is provided in multiple, and multiple rolling tool assemblies are arranged at intervals around the circumference of the central through hole. The rolling tool assemblies are respectively slidably arranged on the tool holder body, and the rolling tool assemblies can slide close to or away from the central through hole.

[0011] Optionally, the hob assembly is provided with three, two first hob assemblies and one second hob assembly, the two first hob assemblies are provided on the same side of the tool holder body as the turning tool assembly, and the second hob assembly is provided on the other side of the tool holder body and alternately provided with the two first hob assemblies along the central through hole.

[0012] Optionally, the first hob assembly comprises:

[0013] a first hob, one side of the tool holder body is provided with two radial long grooves, and the two first hobs are respectively and slidingly arranged in the two radial long grooves;

[0014] a first locking assembly, the tool holder body is provided with a first mounting through hole, the first mounting through hole is provided on one side of the radial long groove, and the first locking assembly is arranged in the first mounting through hole and can lock the first hob.

[0015] Optionally, the first locking assembly comprises a first bolt and a first nut, the side surface of the head of the first bolt or the side surface of the first nut has a first inclined surface, and the first inclined surface abuts against the side surface of the first hob.

[0016] Optionally, the second hob assembly comprises:

[0017] a second hob;

[0018] a locking shaft, the tool holder body is provided with a second mounting through hole, the locking shaft is arranged in the second mounting through hole, and one end of the locking shaft has a first radial through hole;

[0019] a sleeve, the sleeve is sleeved on one end of the locking shaft with the first radial through hole, the sleeve has a second radial through hole, and the second hob is simultaneously arranged in the first radial through hole and the second radial through hole;

[0020] a locking nut, the locking nut is threadedly connected to the other end of the locking shaft to press the second hob between the locking shaft and the sleeve.

[0021] Optionally, the turning tool assembly comprises:

[0022] a turning tool;

[0023] a positioning frame, the positioning frame has a positioning hole, the turning tool is arranged in the positioning hole, and one side of the positioning hole close to the tool holder body has a sliding block, the tool holder body has a horizontal long slot hole, and the sliding block is slidingly connected in the horizontal long slot hole;

[0024] a second locking assembly, the second locking assembly is arranged in the horizontal long slot hole and can lock the turning tool and the positioning frame.

[0025] Optionally, the sliding direction of the sliding block has an angle A with the transverse axis direction of the turning tool, the inclined surface cooperation between the positioning frame and the tool holder body forms an angle B between the surface of the turning tool and the tool holder body, the angle A is the main relief angle or the secondary relief angle of the turning tool, and the angle B is the rake angle of the turning tool.

[0026] Optionally, the turning and rolling tool for the elongated shaft further comprises a supporting assembly, and the supporting assembly comprises:

[0027] a positioning plate fixed on the tool holder body;

[0028] supporting claws, two supporting claws are arranged on two sides of the tool holder body respectively;

[0029] supporting pieces, two supporting pieces are arranged, the fixed ends of the two supporting pieces are connected to the supporting claws respectively, and the suspended ends of the two supporting pieces are suspended below the positioning plate;

[0030] adjusting bolts, the adjusting bolts are threadedly connected to the positioning plate and abut against the suspended ends of the supporting pieces.

[0031] Optionally, the supporting assembly further comprises a third locking assembly, a radial long hole is arranged on the tool holder body, and the third locking assembly is arranged to pass through the two supporting claws and the radial long hole to connect the supporting claws to the tool holder body.

[0032] To achieve the second object, the application adopts the following technical scheme:

[0033] A machining method of the elongated shaft, which is machined by using the turning and rolling tool for the elongated shaft, and the machining method of the elongated shaft comprises the following steps of:

[0034] fixing the tool holder body of the turning and rolling tool for the elongated shaft on a lathe tool rest, adjusting the rolling cutter assembly to slide away from the center through hole or to be disassembled, adjusting the turning tool assembly to slide close to the center through hole and to be fixed after being coincident with the rotation center of the elongated shaft, and turning the elongated shaft;

[0035] or, fixing the tool holder body of the turning and rolling tool for the elongated shaft on a lathe tool rest, adjusting the turning tool assembly to slide away from the center through hole or to be disassembled, and adjusting the rolling cutter assembly to slide close to the center through hole and to be fixed, and rolling the elongated shaft;

[0036] Or, the turning of the elongated shaft and the tool holder body of the rolling cutter are fixed on the lathe tool rest, the turning tool assembly and the hobbing tool assembly are adjusted to slide and fix at the same time close to the center through hole, and the turning and rolling of the elongated shaft are simultaneously performed.

[0037] Advantages of the present application:

[0038] The turning and rolling cutter for the elongated shaft provided by the present application can realize the turning and rolling separately or simultaneously by arranging the slidable turning tool assembly and the hobbing tool assembly around the center through hole on the tool holder body, thereby solving the problem of low machining precision caused by repeated clamping and fixing of the elongated shaft and improving the machining efficiency.

[0039] The turning and rolling cutter for the elongated shaft provided by the present application can realize the turning and rolling separately or simultaneously by arranging the slidable turning tool assembly and the hobbing tool assembly around the center through hole on the tool holder body, thereby solving the problem of low machining precision caused by repeated clamping and fixing of the elongated shaft and improving the machining efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 is a first perspective structural schematic view of the turning and rolling cutter for the elongated shaft provided by the embodiment of the present application;

[0041] Figure 2 is a second perspective structural schematic view of the turning and rolling cutter for the elongated shaft provided by the embodiment of the present application;

[0042] Figure 3 is a structural schematic view of the tool holder body in the turning and rolling cutter for the elongated shaft provided by the embodiment of the present application;

[0043] Figure 4 is an exploded structural schematic view of the first hobbing tool assembly in the turning and rolling cutter for the elongated shaft provided by the embodiment of the present application;

[0044] Figure 5 is an exploded structural schematic view of the second hobbing tool assembly in the turning and rolling cutter for the elongated shaft provided by the embodiment of the present application;

[0045] Figure 6 is a first perspective structural schematic view of the turning tool assembly in the turning and rolling cutter for the elongated shaft provided by the embodiment of the present application;

[0046] Figure 7 is a second perspective structural schematic view (without the second nut) of the turning tool assembly in the turning and rolling cutter for the elongated shaft provided by the embodiment of the present application

[0047] Figure 8 is a structural schematic view of the support assembly in the turning and rolling cutter for the elongated shaft provided by the embodiment of the present application.

[0048] Fig.:

[0049] 1, tool holder body; 11, central through hole; 12, radial long slot; 13, first mounting through hole; 14, second mounting through hole; 15, horizontal long slot hole; 16, radial long slot hole; 17, second inclined surface;

[0050] 2, turning tool assembly; 21, turning tool; 22, positioning frame; 23, second locking assembly; 231, screw rod; 232, second nut; 24, sliding block;

[0051] 3, hob assembly; 31, first hob assembly; 311, first hob; 3111, hob body; 3112, hob frame; 312, first locking assembly; 3121, first bolt; 3122, first nut; 31221, first inclined surface; 32, second hob assembly; 321, second hob; 322, locking shaft; 3221, first radial through hole; 323, sleeve; 3231, second radial through hole; 324, locking nut;

[0052] 4, support assembly; 41, positioning plate; 42, support claw; 421, gasket; 43, support sheet; 44, adjusting bolt; 45, third locking assembly; 451, second bolt; 452, third nut. DETAILED DESCRIPTION

[0053] The application will be further described below in conjunction with the drawings and examples. It can be understood that the specific examples described herein are only used to explain the application, and not to limit the application. In addition, it should be noted that, for the convenience of description, only the parts related to the application are shown in the drawings, not all the structures.

[0054] In the description of the application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0055] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature "under", "below" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0056] In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like, orientation or positional relationship shown in the drawings, are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only used to distinguish in description, and have no special meaning.

[0057] The present application provides an elongated shaft turning and rolling tool, which comprises a tool holder body 1, a turning tool assembly 2 and a plurality of rolling tool assemblies 3. Figure 1 and Figure 2 The tool holder body 1 has a central through hole 11 for passing the elongated shaft; the turning tool assembly 2 is slidably arranged on the tool holder body 1 to turn the elongated shaft, and the turning tool assembly 2 can slide towards or away from the central through hole 11; the plurality of rolling tool assemblies 3 are arranged around the central through hole 11, and the plurality of rolling tool assemblies 3 are slidably arranged on the tool holder body 1 to roll the elongated shaft, and the rolling tool assemblies 3 can slide towards or away from the central through hole 11.

[0058] The turning and rolling tool for the elongated shaft provided by the present application can realize turning and rolling separately or simultaneously by arranging the turning tool assembly 2 and the rolling tool assembly 3 around the central through hole 11 on the tool holder body 1, and the turning and rolling are realized by adjusting the turning tool assembly 2 and the rolling tool assembly 3 to slide on the tool holder body 1, which solves the problem of low machining precision caused by repeated clamping and fixing of the elongated shaft, and improves the machining efficiency.

[0059] Optionally, the rolling tool assemblies 3 are three, which are two first rolling tool assemblies 31 and one second rolling tool assembly 32, the two first rolling tool assemblies 31 are arranged on the same side of the tool holder body 1 as the turning tool assembly 2, and the second rolling tool assembly 32 is arranged on the other side of the tool holder body 1 and alternately arranged with the two first rolling tool assemblies 31 along the central through hole 11.

[0060] AsFigure 1 and Figure 2 In the embodiment shown in the figure, three hob assemblies 3 and one turning tool assembly 2 are arranged at intervals around the center through hole 11. The turning tool assembly 2 and two first hob assemblies 31 are arranged on the same side of the tool holder body 1, and the second hob assembly 32 is arranged on the other side of the tool holder body 1 and between the two first hob assemblies 31. The turning tool assembly 2 and the hob assembly 3 can be respectively abutted with the elongated shaft passing through the center through hole 11 to realize turning and roll forming machining. When turning and roll forming are performed simultaneously, the two first hob assemblies 31 on the same side of the turning tool assembly 2 and the turning tool assembly 2 can form three-point support for the elongated shaft, which is beneficial to improve the machining precision of the elongated shaft.

[0061] Optionally, the first hob assembly 31 comprises a first hob 311 and a first locking assembly 312. One side of the tool holder body 1 is provided with two radial long grooves 12, and the two first hobs 311 are respectively arranged in the two radial long grooves 12. The tool holder body 1 is provided with a first mounting through hole 13 arranged on one side of the radial long groove 12, and the first locking assembly 312 is arranged in the first mounting through hole 13 and can lock the first hob 311.

[0062] The tool holder body 1 provided in the embodiment is shown in the figure Figure 3 The center of the tool holder body 1 is provided with a center through hole 11, and the circumferential direction of the center through hole 11 is provided with two radial long grooves 12 communicating with the center through hole 11. The two radial long grooves 12 are arranged at a certain angle. One side or both sides of the two radial long grooves 12 are separately or simultaneously provided with a first mounting through hole 13. The first hob 311 is arranged in the radial long groove 12, so that the first hob 311 can slide close to the center through hole 11 to roll the elongated shaft, or slide away from the center through hole 11 to avoid affecting the turning machining of the elongated shaft. It should be noted that the first hob 311 comprises a hob body 3111 and a hob holder 3112, which is generally known to the public. The figure only provides a structural schematic diagram of the first hob 311 to facilitate understanding of the sliding adjustment of the first hob 311.

[0063] Optionally, the embodiment provides a locking and adjusting mode of the first hob 311, as shown in the figure Figure 4As shown, the first locking assembly 312 includes a first bolt 3121 and a first nut 3122, and the side of the head of the first bolt 3121 or the side of the first nut 3122 has a first inclined surface 31221 which abuts the side of the first hob 311. Taking the first inclined surface 31221 provided on the side of the first nut 3122 as an example, the first inclined surface 31221 is obliquely arranged from one end of the first nut 3122 to the other end. The installation and locking process of the first hob 311 is as follows: the first bolt 3121 is arranged in the first installation through hole 13, and the first inclined surface 31221 abuts the side of the first hob 311 (specifically the hob holder 3112) during initial installation. As the first bolt 3121 is continuously tightened with the first nut 3122, the force between the first inclined surface 31221 and the first hob 311 increases, so that the first inclined surface 31221 moves in the screwing direction, and at the same time, the first inclined surface 31221 presses the first hob 311 towards the other side wall of the radial long groove 12, until the first hob 311 is reliably pressed and fixed between the first inclined surface 31221 of the first nut 3122 and the side wall of the radial long groove 12. When the first inclined surface 31221 is arranged on the head of the first bolt 3121, the installation and locking process is the same, except that the direction of arranging the first installation through hole 13 is exchanged. In this embodiment, the first inclined surface 31221 is arranged on the side of the head of the first bolt 3121 or the side of the first nut 3122, so that the first hob 311 can be adjusted by the threaded screwing distance to lock and unlock, and the radial displacement of the first hob 311 is facilitated to be adjusted. It can be understood that when only turning is performed without rolling, the first hob assembly 31 and the second hob assembly 32 can be respectively slid away from the central through hole 11, or disassembled, so as to perform turning alone.

[0064] Optionally, the second hob assembly 32 includes a second hob 321, a locking shaft 322, a sleeve 323 and a locking nut 324, and the second hob 321 is arranged in the first radial through hole 3221 of the locking shaft 322 and the second radial through hole 3231 of the sleeve 323. Figure 3 The tool holder body 1 is provided with a second installation through hole 14, the locking shaft 322 is arranged in the second installation through hole 14, and one end of the locking shaft 322 has a first radial through hole 3221. The sleeve 323 is sleeved on the end of the locking shaft 322 having the first radial through hole 3221, the sleeve 323 has a second radial through hole 3231, and the second hob 321 is arranged in the first radial through hole 3221 and the second radial through hole 3231 at the same time. The locking nut 324 is threadedly connected to the other end of the locking shaft 322 to press the second hob 321 between the locking shaft 322 and the sleeve 323.

[0065] As Figure 5As shown, one end of the locking shaft 322 has a first radial through hole 3221, and the other end has external threads for cooperating with the locking nut 324 to lock, when the hob shaft of the second hob 321 is inserted into the first radial through hole 3221 and the second radial through hole 3231, the radial length of the second hob 321 can be adjusted, and at the same time, before the locking nut 324 is tightened to fix the locking shaft 322, the rotation of the second hob 321 in the plane of the tool holder body 1 can be adjusted to cooperate with the rolling process of the elongated shaft. It can be understood that, in order to avoid interference, the first mounting through hole 13 near the side of the second hob 321 is a counterbore, and the first locking assembly 312 can be assembled in the counterbore. It can be understood that, when the locking nut 324 is tightened to fix the external threads on the locking shaft 322, the locking shaft 322 moves in the direction close to the tool holder body 1, thereby being able to clamp and fix the second hob 321 between the hole walls of the first radial through hole 3221 and the second radial through hole 3231.

[0066] Optionally, the turning tool assembly 2 comprises a turning tool 21, a positioning frame 22, and a second locking assembly 23, the positioning frame 22 has a positioning hole, and the turning tool 21 is inserted into the positioning hole; the positioning hole has a sliding block 24 near the side close to the tool holder body 1, the tool holder body 1 has a horizontal long slot 15, and the sliding block 24 is slidingly connected in the horizontal long slot 15; the second locking assembly 23 is inserted into the horizontal long slot 15 and can lock the turning tool 21 and the positioning frame 22.

[0067] As shown in Figure 3 and Figure 5 , the tool holder body 1 is provided with a horizontal long slot 15, which is a stepped hole, which can avoid excessive connection when locking the turning tool 21. One end of the second locking assembly 23 is fixed on the sliding block 24, and the other end can be inserted into the stepped hole and locked on the other side of the tool holder body 1, while clamping and fixing the turning tool 21 between the positioning frame 22 and the tool holder body 1. The turning tool assembly 2 is slidingly arranged in the horizontal long slot 15, which facilitates the turning tool assembly 2 to slide away from and close to the first through hole 11, and can flexibly adjust the initial position of the turning tool assembly 2 and the elongated shaft, so as to facilitate accurate turning machining.

[0068] As shown in Figure 5 , the second locking assembly 23 comprises a screw rod 231 and a second nut 232, one end of the screw rod 231 is fixed (such as welded) to the end face of the sliding block 24, and the other end can be inserted into the horizontal long slot 15 and threadedly connected with the second nut 232 to clamp and install the turning tool 21.

[0069] Optionally, the sliding direction of the sliding block 24 has an included angle A with the transverse axis direction of the turning tool 21, and the positioning frame 22 is installed in inclined surface cooperation with the tool holder body 1 to form an included angle B between the turning tool 21 and the surface of the tool holder body 1, the included angle A is the main relief angle or the secondary relief angle of the turning tool 21, and the included angle B is the rake angle of the turning tool 21.

[0070] As shown in Figure 6 and Figure 7 , the slider 24 is long strip shape, the long axis direction of the slider 24 is same with the sliding direction, the slider 24 has a certain angle with the positioning hole on the positioning frame 22, the tool bit 21 is arranged in the positioning hole along the long axis direction of the tool bit 21, the transverse axis of the tool bit 21 is perpendicular to the long axis, the transverse axis of the tool bit 21 and the long axis direction of the slider 24 form an angle A, after the slider 24 is slidingly arranged in the horizontal long strip hole 15, the angle A is the main relief angle or the secondary relief angle of the tool bit 21, generally the angle A is 3-8° or 6-8°. As shown in Figure 1 and Figure 3 , the surface of the tool holder body 1 is machined with a second inclined surface 17, when the positioning frame 22 is slidingly arranged in the horizontal long strip hole 15 through the slider 24, the positioning frame 22 is attached and arranged with the tool holder body 1 at the second inclined surface 17, so that the tool bit 21 on the positioning frame 22 and the tool holder body 1 form an angle B, the angle B is the rake angle of the tool bit 21, which is also the cutting angle of the second inclined surface 17. The present application sets the inclined surface cooperation between the positioning frame 22 and the tool holder body 1 and the angle A between the slider 24 and the positioning hole on the positioning frame 22 or the tool bit 21, so that the tool bit 21 can be free from the sharpening of the main relief angle, the secondary relief angle and the rake angle, and the installation is convenient and fast.

[0071] Optionally, the elongated shaft turning and rolling tool further comprises a supporting assembly 4, which supports the elongated shaft and has the functions of a tailstock and a center rest, and constitutes an auxiliary support for the elongated shaft. As shown in Figure 1 , Figure 2 and Figure 8 , the supporting assembly 4 comprises a positioning plate 41, supporting claws 42, supporting pieces 43 and adjusting bolts 44. The positioning plate 41 is fixed to the tool holder body 1, as shown in Figure 1 , the positioning plate 41 is an L-shaped plate, the vertical plate of the positioning plate 41 is fixed to the front end face of the tool holder body 1, the horizontal plate of the positioning plate 41 is provided with two bolt holes, and the adjusting bolts 44 are threadedly connected into the two bolt holes from top to bottom; the supporting claws 42 are provided with two, which are respectively located on the two sides of the tool holder body 1 and abut against the tool holder body 1; the supporting pieces 43 are provided with two, the fixed ends of the two supporting pieces 43 are respectively connected to the supporting claws 42, and the suspended ends of the two supporting pieces 43 are suspended below the positioning plate 41; after the adjusting bolts 44 are threadedly connected to the threaded holes of the positioning plate 41, the end portions thereof are downward and can abut against the suspended ends of the supporting pieces 43. By increasing the screwing depth of the adjusting bolts 44, the adjusting bolts 44 press the supporting pieces 43 downward, so that the fixed ends of the supporting pieces 43 drive the supporting claws 42 to support the elongated shaft upward, thereby realizing the elastic support of the elongated shaft. The connection mode of the fixed ends of the supporting pieces 43 and the supporting claws 42 can be welding or screwing, so as to realize the detachable and adjustable connection.

[0072] In some embodiments, the support claw 42 is provided with a gasket 421 on the end face close to one end of the elongated shaft, the gasket 421 is an elastic gasket, which is used to reduce the friction between the support claw 42 and the elongated shaft and also plays a role of shock absorption.

[0073] In order to ensure the synchronization of the two support claws 42, the tool holder body 1 is provided with a radial long hole 16, and the two support claws 42 are rotationally connected to the tool holder body 1 through a third locking assembly 45.

[0074] As shown in Figure 3 and Figure 8 , the third locking assembly 45 includes a second bolt 451 and a third nut 452, the second bolt 451 is a single-end bolt, and can also be a double-end bolt, the second bolt 451 is arranged in the radial long hole 16, and the two ends are arranged in the two support claws 42 and locked and fixed through the third nut 452, which limits the axial movement of the two support claws 42. The fixed connection of the support plate 43 is on the side of the third locking assembly 45 away from the central through hole 11, and the gasket 421 is arranged on the side facing the central through hole 11. By adjusting the bolt 44 to press the suspended end of the support plate 43 downward, the fixed end of the support plate 43 drives the support claw 42 to have a rotating support force, and the side of the support claw 42 facing the central through hole 11 has an upward support force, thereby realizing the support effect on the elongated shaft. The radial long hole 16 is a long hole, which is arranged on the tool holder body 1 outside the central through hole 12 in the radial direction of the central through hole 11. By adjusting the tightening degree of the third nut 452, the sliding position of the support claw 42 in the radial long hole 16 can be adjusted, so that the support assembly 4 is slidingly connected with respect to the radial long hole 16 as a whole, and the support assembly 4 can slide close to or away from the central through hole 11, which is convenient for adjusting the position of the support assembly 4 according to the outer diameter of the elongated shaft, and realizes flexible adjustment.

[0075] In some embodiments, the support plate 43 is an elastic metal sheet.

[0076] The turning and rolling tool for the elongated shaft provided by the application has the advantages of compact structure, light weight, reasonable component layout, and each component has adjustability, which can be adjusted according to the diameter of the elongated shaft to be machined, can independently precision turn the elongated shaft according to the machining requirement, can independently roll the elongated shaft, can precision turn and roll the elongated shaft synchronously, can improve the finishing machining quality and production efficiency of the elongated shaft, can improve the surface hardness and wear resistance of the workpiece, and can reduce the surface roughness value of the workpiece. Especially suitable for machining the elongated shaft with a diameter of 3-20mm, the machining precision can reach IT6-IT8 level, and the surface roughness value is Ra0.4-Ra0.8um.

[0077] The machining method of the elongated shaft provided by the embodiment of the present application is realized according to the turning and rolling tool of the elongated shaft, and the machining method of the elongated shaft includes three implementation manners, which are respectively:

[0078] The independent precision turning machining of the elongated shaft: the tool holder body 1 is fixed on the lathe tool rest, the support assembly 4 is adjusted to be away from the position of the rotation center of the elongated shaft, the hob assembly 3 is adjusted to be away from the center through hole 11 to slide or be disassembled, and the turning tool assembly 2 is adjusted to slide close to the center through hole 11 and coincide with the rotation center of the elongated shaft and be located at the specified length position of the semi-finished turned elongated shaft. Then, the two support claws 42 of the support assembly 4 are adjusted to support the positions of the surface to be machined and the machined surface of the elongated shaft, the bolt 44 is adjusted to press the support piece 43 to transmit the support force to the two support claws 42, the elongated shaft is assisted and supported, and the elongated shaft is turned and finished to meet the requirements through multiple turning and adjustment, and the turning machining is completed.

[0079] The independent rolling machining: the turning tool assembly 2 is adjusted to slide away from the center through hole 11 or be disassembled, and the hob assembly 3 is adjusted to slide close to the center through hole 11 to perform the rolling machining on the elongated shaft.

[0080] Specifically, the tool holder body 1 is fixed on the lathe tool rest, the support claws 42 of the support assembly 4 are adjusted to the position of the outer circular surface of the elongated shaft, then the first hob 311 of the first hob assembly 31 and the second hob 321 of the second hob assembly 32 are respectively in contact with the outer peripheral surface of the elongated shaft, the appropriate rolling pressure is adjusted, the hob assembly 3 is locked, the cutting fluid is added, and the independent rolling machining of the elongated shaft is formed.

[0081] The turning and rolling simultaneous machining: the turning tool assembly 2 and the hob assembly 3 are adjusted to simultaneously slide close to the center through hole 11 and be fixed, and the turning and rolling machining is simultaneously performed on the elongated shaft.

[0082] Specifically, the tool holder body 1 is first fixed on the lathe tool rest, then the turning tool assembly 2, the hob assembly 3 and the support assembly 4 are adjusted, the turning and rolling are simultaneously performed, and the different machining of the turning and rolling is realized.

[0083] The machining method of the elongated shaft provided by the present application can selectively perform the turning machining or the rolling machining or simultaneously perform the turning and rolling machining on the elongated shaft after the elongated shaft is clamped and fixed, and thus the machining precision of the turning and rolling is improved and the machining efficiency is improved. The turning and rolling tool of the elongated shaft provided by the present application is independently adjustable, can be disassembled, the position adjustment is flexible, the selectivity of the independent machining and the synchronous machining of the turning and rolling is realized, the use range is larger, and the machining precision and the machining efficiency are improved.

[0084] Obviously, the above embodiments of the present application are merely exemplary but not intended to limit the embodiments of the present application. Various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the scope of the present application. It is not necessary or possible to enumerate all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A turning and rolling tool for elongated shafts, characterized in that The utility model relates to a tool holder, and particularly relates to a tool holder for machining an elongated shaft. The tool holder comprises: a tool holder body (1) having a central through hole (11) for passing through the elongated shaft; a turning tool assembly (2) for turning the elongated shaft, the turning tool assembly (2) being slidably arranged on the tool holder body (1) and capable of sliding towards or away from the central through hole (11); a plurality of hob assemblies (3) for hobbing the elongated shaft, the plurality of hob assemblies (3) being arranged around the periphery of the central through hole (11) and slidably arranged on the tool holder body (1), and the plurality of hob assemblies (3) being capable of sliding towards or away from the central through hole (11).

2. The turning and rolling tool for elongated shafts according to claim 1, characterized in that, The plurality of hob assemblies (3) comprises three hob assemblies, two first hob assemblies (31) and one second hob assembly (32), the two first hob assemblies (31) being arranged on the same side of the tool holder body (1) as the turning tool assembly (2), and the second hob assembly (32) being arranged on the other side of the tool holder body (1) and alternating with the two first hob assemblies (31) along the central through hole (11). The first hob assembly (31) comprises: a first hob (311), the tool holder body (1) being provided with two radial long grooves (12) on one side, and the two first hobs (311) being slidably arranged in the two radial long grooves (12) respectively; 3. The turning and rolling tool for elongated shafts according to claim 2, characterized in that, a first locking assembly (312), the tool holder body (1) being provided with a first mounting through hole (13) on one side of the radial long groove (12), and the first locking assembly (312) being arranged in the first mounting through hole (13) and capable of locking the first hob (311).

4. The turning and rolling tool for elongated shafts according to claim 1, characterized in that, The first locking assembly (312) comprises a first bolt (3121) and a first nut (3122), the side surface of the head of the first bolt (3121) or the side surface of the first nut (3122) being provided with a first inclined surface (31221), and the first inclined surface (31221) abutting against the side surface of the first hob (311). The second hob assembly (32) comprises: a second hob (321); a locking shaft (322), the tool holder body (1) being provided with a second mounting through hole (14), and the locking shaft (322) being arranged in the second mounting through hole (14), one end of the locking shaft (322) being provided with a first radial through hole (3221); a sleeve (323), the sleeve (323) being sleeved on one end of the locking shaft (322) provided with the first radial through hole (3221), the sleeve (323) being provided with a second radial through hole (3231), and the second hob (321) being arranged in the first radial through hole (3221) and the second radial through hole (3231) simultaneously. A lock nut (324) is threadedly connected to the other end of the lock shaft (322) to press the second hob (321) tightly between the lock shaft (322) and the sleeve (323).

5. A turning and rolling tool for elongated shafts according to any of claims 1-4, characterized in that, The turning tool assembly (2) comprises: a turning tool (21); a positioning frame (22) having a positioning hole in which the turning tool (21) is arranged, the positioning hole being provided with a sliding block (24) near one side of the tool holder body (1), the tool holder body (1) being provided with a horizontal long slot (15), and the sliding block (24) being slidingly connected in the horizontal long slot (15); a second locking assembly (23) arranged in the horizontal long slot (15) and capable of locking the turning tool (21) and the positioning frame (22).

6. The turning and rolling tool for elongated shafts according to claim 5, characterized in that, The sliding direction of the sliding block (24) and the transverse axis direction of the turning tool (21) form an included angle A, and the positioning frame (22) and the tool holder body (1) are installed in a slope matching manner to form an included angle B between the turning tool (21) and the surface of the tool holder body (1), the included angle A being the main relief angle or the secondary relief angle of the turning tool (21), and the included angle B being the rake angle of the turning tool (21).

7. A turning and rolling tool for elongated shafts according to any of claims 1-4, characterized in that, Further comprising a supporting assembly (4) comprising: a positioning plate (41) fixed on the tool holder body (1); two supporting claws (42) respectively arranged on two sides of the tool holder body (1); two supporting pieces (43) having fixed ends respectively connected to the supporting claws (42) and suspended ends respectively suspended below the positioning plate (41); an adjusting bolt (44) threadedly connected to the positioning plate (41) and abutting against the suspended ends of the supporting pieces (43).

8. The turning and rolling tool for elongated shafts according to claim 7, characterized in that, The supporting assembly (4) further comprises a third locking assembly (45), the tool holder body (1) being provided with a radial long slot (16), and the third locking assembly (45) being arranged through the two supporting claws (42) and the radial long slot (16) to connect the supporting claws (42) to the tool holder body (1).

9. A method of machining an elongate shaft characterised in that, The machining method of the elongated shaft by using the turning and rolling tool of any one of claims 1-8 comprises: fixing the tool holder body (1) of the turning and rolling tool of the elongated shaft on a lathe tool rest, adjusting the rolling tool assembly (3) to slide away from the center through hole (11) or to be disassembled, adjusting the turning tool assembly (2) to slide close to the center through hole (11) and to be fixed after coinciding with the rotation center of the elongated shaft, and turning the elongated shaft; Or, the turning of the elongated shaft and the tool holder body (1) of the hobbing cutter are fixed on the lathe tool rest, the turning tool assembly (2) is adjusted to slide away from the center through hole (11) or disassembled, and the hobbing cutter assembly (3) is adjusted to slide close to the center through hole (11) and fixed, and the elongated shaft is hobbed; Or, the turning of the elongated shaft and the tool holder body (1) of the hobbing cutter are fixed on the lathe tool rest, the turning tool assembly (2) and the hobbing cutter assembly (3) are adjusted to slide close to the center through hole (11) at the same time and fixed, and the elongated shaft is turned and hobbed at the same time.

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