Straightening device for elongated shafts

Abstract

The application discloses a straightening device for an elongated shaft, which comprises a rack, a positioning support assembly and an axial straightening assembly arranged on the rack, the elongated shaft is arranged on the positioning support assembly, the positioning support assembly is used for limiting the radial movement of the elongated shaft, the axial straightening assembly comprises two magnetic attractors which are connected to the rack and have magnetic force, the two magnetic attractors are arranged on the two sides of the elongated shaft in the axial direction respectively, the magnetic attractors on the two sides respectively apply magnetic attraction force to the two ends of the elongated shaft to straighten the elongated shaft in the axial direction, and the axial straightening assembly and the shaft center of the elongated shaft are not connected.

Description

TECHNICAL FIELD

[0001] The present application relates to a straightening and correcting device, in particular to a straightening and correcting device for an elongated shaft, which straightens and corrects the bending deformation of the elongated shaft. TECHNICAL BACKGROUND

[0002] In the field of existing mechanical production and processing, there is an elongated shaft workpiece or tool with a small diameter, which needs to be surface processed or processed by the elongated shaft tool.

[0003] The existing elongated shaft has the following problems: 1. When the elongated shaft workpiece is processed, the tool is pressed against the side wall of the elongated shaft workpiece, and the tool processes the surface of the elongated shaft workpiece by rotating the elongated shaft workpiece. Since the elongated shaft is relatively long and thin, it is easy to deform under radial force, and after deformation, the tool will process a corrugated surface on the elongated shaft workpiece, which is uneven and uneven.

[0004] 2. When the elongated shaft tool processes the surface of the workpiece, the elongated shaft tool is pressed against the surface of the workpiece to process the workpiece. Since the elongated shaft tool is relatively long and thin, it is easy to deform under radial force, and after deformation, the tool will process a corrugated surface on the workpiece. The elongated shaft tool can rotate or not rotate during processing.

[0005] To solve the above problems, the market has a method of stretching the elongated shaft from both ends to tension the elongated shaft, thereby avoiding deformation of the elongated shaft under radial force.

[0006] For example, a thin-walled elongated shaft part axial stretching machining device and method with publication number CN112621115A, which includes a base, a left hydraulic chuck fixed inside the left support surface of the base, and a right hydraulic chuck fixed inside the right support surface of the base. The left and right hydraulic chucks hold the two ends of the elongated shaft, and then the right hydraulic chuck is pulled by the hydraulic cylinder to tension the elongated shaft.

[0007] However, the two chucks are used to clamp the elongated shaft and position the axis of the elongated shaft, and are also used to stretch the elongated shaft. The clamping centers of the two chucks must coincide, and the axis of the elongated shaft must also coincide with the clamping centers. However, the existing chucks are difficult to ensure that the axis of the elongated shaft coincides with the clamping centers, and there is a large error. SUMMARY

[0008] Based on the problem of easy deformation of the elongated shaft, the present application provides a straightening and correcting device for positioning the axis of the elongated shaft and straightening and correcting the elongated shaft.

[0009] The technical scheme adopted by the present application to solve the above technical problems is: the straightening and correcting device of the elongated shaft, comprising a rack, characterized in that the rack is provided with a positioning and supporting assembly and an axial straightening assembly, the elongated shaft is installed on the positioning and supporting assembly, the positioning and supporting assembly is used for limiting the radial movement of the elongated shaft,

[0010] The axial straightening assembly comprises two magnetic attractors connected to the rack and having magnetic force, the two magnetic attractors are respectively arranged on the two sides of the elongated shaft in the axial direction, the two magnetic attractors respectively apply magnetic attraction force to the two ends of the elongated shaft to straighten the elongated shaft in the axial direction to the two sides, and the axial straightening assembly and the shaft center of the elongated shaft are not connected.

[0011] The further preferred technical scheme of the present application is that the two magnetic attractors are electromagnets, the two ends of the elongated shaft are provided with attracted parts matched with the magnetic force of the electromagnets, the attracted parts can be magnetized, the two electromagnets apply magnetic attraction force to the attracted parts of the two ends of the elongated shaft to straighten the elongated shaft in the axial direction to the two sides.

[0012] The further preferred technical scheme of the present application is that the positioning and supporting assembly comprises a first support and a second support, the end faces of the two ends of the elongated shaft are respectively provided with center holes with taper, the first support and the second support are respectively provided with top pins matched with the shapes of the center holes, and the two top pins are respectively arranged in the center holes of the end faces of the two ends of the elongated shaft to support the elongated shaft.

[0013] The further preferred technical scheme of the present application is that the rack is provided with a movable frame, the movable frame can move relative to the rack in the axial direction of the elongated shaft, the first support and one side of the magnetic attractor are fixed on the movable frame, the second support and the other side of the magnetic attractor are fixed on the rack, and the two magnetic attractors are respectively fixed on the first support and the second support.

[0014] The further preferred technical scheme of the present application is that the positioning and supporting assembly comprises a first support and a second support, the first support and the second support both comprise V-shaped grooves, the side walls of the elongated shaft are simultaneously arranged on the groove walls of the V-shaped grooves of the first support and the second support to position the shaft center of the elongated shaft, the first support and the second support both comprise anti-extraction parts for preventing the elongated shaft from being separated from the V-shaped grooves,

[0015] One side of the magnetic attractor and the rack form a blocking part with magnetic force, the elongated shaft is attracted to the blocking part to limit the axial movement of the elongated shaft after being pulled by the magnetic attraction force of the blocking part to one side, and the magnetic attraction force of the blocking part on the elongated shaft is greater than the magnetic attraction force of the other side of the magnetic attractor on the elongated shaft.

[0016] The further preferred technical scheme of the present application is that the anti-extraction part comprises a cross-plate connected to the two side walls of the V-shaped groove, the cross-plate is provided with a threaded hole for inserting a threaded stud, one end of the threaded stud is provided with an extrusion end capable of elastic deformation, and the extrusion end is pressed on the surface of the elongated shaft to limit the elongated shaft from being separated from the V-shaped groove.

[0017] The further preferred technical scheme of the present application is that the frame is provided with a movable frame, the movable frame can move relative to the frame in the axial direction of the elongated shaft, and one side of the magnetic attractor is fixed on the movable frame, and the other side of the magnetic attractor, the first support and the second support are fixed on the frame.

[0018] The further preferred technical scheme of the present application is that the frame is further provided with a driving rotary part, the driving rotary part has two states of coincidence or non-coincidence with the elongated shaft, the driving rotary part is connected with a swing arm, the elongated shaft is fixed with a driven rotary part, the driving rotary part drives the driven rotary part through the swing arm linkage to rotate the elongated shaft, and the driving rotary part shaft and the elongated shaft shaft are not connected.

[0019] The further preferred technical scheme of the present application is that the driven rotary part is provided with a closed loop or non-closed loop slot hole, or a push arm, the swing arm leans against the inner wall of the slot hole or the push arm, the swing arm can freely move in the axial and radial directions relative to the slot hole or the push arm, and the swing arm can drive the driven rotary part to rotate by pushing the inner wall of the slot hole or the push arm.

[0020] The further preferred technical scheme of the present application is that the driving rotary part is a driven wheel, the frame is sleeved with a bearing, the driven wheel is sleeved outside the bearing and connected with the outer ring of the bearing, the inner ring of the bearing is connected with the frame, the frame is provided with a driving motor, the output shaft of the driving motor is connected with a driving wheel, a belt for transmission is connected between the driving wheel and the driven wheel, and the driving motor drives the driving rotary part to rotate through the driving wheel.

[0021] Compared with the prior art, the frame is provided with a positioning support assembly and an axial straightening assembly, the elongated shaft is installed on the positioning support assembly, the axial center of the elongated shaft can be positioned by the positioning support assembly, the positioning support assembly limits the radial movement of the elongated shaft, the axial straightening assembly and the axial center of the elongated shaft are not connected, and the axial straightening assembly is only used for straightening the elongated shaft to the two sides, the axial straightening assembly includes two magnetic attractors connected to the frame and having magnetic force, the magnetic attractors arranged on the two sides of the elongated shaft apply magnetic attraction force to the elongated shaft to straighten the elongated shaft to the two sides, the stability of the elongated shaft during use is improved, the axial center of the elongated shaft is not associated with the axial straightening assembly, the axial straightening assembly does not affect the axial center of the elongated shaft, the relative position of the elongated shaft and the axial straightening assembly does not need to be calibrated, the installation accuracy of the elongated shaft is improved, and errors are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0022] The present application will be described in further detail below with reference to the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are only for the purpose of explaining the preferred embodiments and therefore should not be taken as limiting the scope of the present application. In addition, unless specifically indicated otherwise, the drawings only schematically represent the composition or configuration of the described objects and can include exaggerated displays, and the drawings are not necessarily drawn to scale.

[0023] Figure 1 Overall structure of Example 1 Figure 1 ;

[0024] Figure 2 Overall structure of Example 1 Figure 2 ;

[0025] Figure 3 Structure of Example 1 when installing the elongated shaft

[0026] Figure 4 Cross-sectional view of Example 1 when installing the elongated shaft

[0027] Figure 5 State diagram of Example 1 when the movable frame moves the first support away

[0028] Figure 6 State diagram of the structure of Example 1 when used on an EDM machine or an electrolytic machine

[0029] Figure 7 Overall structure of Example 2 Figure 1 ;

[0030] Figure 8 Overall structure of Example 2 Figure 2 ;

[0031] Figure 9 Structure of Example 2 when installing the elongated shaft

[0032] Figure 10 Cross-sectional view of Example 2 when installing the elongated shaft

[0033] Figure 11 State diagram of Example 2 when the movable frame moves the main rotating member away

[0034] Figure 12 Cross-sectional view of the structure of Example 2 when the axial support member contacts the elongated shaft and the blocking member

[0035] Figure 13 State diagram of the structure of Example 2 when used on an EDM machine or an electrolytic machine

[0036] In the figure: 1, frame; 2, first support; 3, second support; 4, movable frame; 5, magnetic attractor; 6, X-axis fixed guide rail; 7, X-axis screw; 8, X-axis movable guide rail; 9, X-axis motor; 10, top pin; 11, driving motor; 12, driving wheel; 13, belt; 14, driving rotating part; 15, swing arm; 16, elongated shaft; 17, driven rotating part; 18, pushed arm; 19, attracted part; 20, center hole; 21, bearing; 22, electric spark machine or electrolytic machine; 23, workpiece; 24, extension frame; 25, positioning groove; 26, V-shaped groove; 27, extruded end; 28, stud; 29, cross frame plate; 30, co-site holding frame; 31, center shaft; 32, axial supporting part; 33, blocking part. DETAILED DESCRIPTION

[0037] The preferred embodiments of the present application will be described in detail below with reference to the attached drawings. Those skilled in the art will appreciate that the description is merely descriptive and exemplary, and should not be interpreted as limiting the scope of protection of the present application.

[0038] It should be noted that similar reference numerals represent similar items in the following drawings, and once an item is defined in one drawing, it can not be further defined and explained in subsequent drawings.

[0039] Embodiment One

[0040] Figures 1-6 As shown, the straightening and correcting device for elongated shafts includes a frame 1, and the frame 1 is provided with a positioning support assembly and an axial straightening assembly.

[0041] Figures 1-3 As shown, the elongated shaft 16 is installed on the positioning support assembly, and the positioning support assembly is used to limit the radial movement of the elongated shaft 16.

[0042] The positioning support assembly includes a first support 2 and a second support 3, and the first support 2 and the second support 3 are connected to the frame 1 and are oppositely arranged, and the first support 2 and the second support 3 are used to limit the radial movement of the elongated shaft 16, so as to position the axis of the elongated shaft 16 and prevent the axis of the elongated shaft 16 from deviating.

[0043] The frame 1 is provided with a movable frame 4, and the movable frame 4 can move in the X-axis direction relative to the frame 1.

[0044] Figure 1As shown, specifically, the rack 1 is fixed with the X-axis fixed guide rail 6 and the X-axis motor 9, the X-axis fixed guide rail 6 is slidingly connected with the X-axis movable guide rail 8, the output shaft of the X-axis motor 9 is fixedly connected with the X-axis screw rod 7, the X-axis screw rod 7 is sleeved with the X-axis nut, the X-axis movable guide rail 8 is fixedly connected with the X-axis nut, the X-axis screw rod 7 is arranged along the X-axis direction, when the X-axis motor 9 drives the X-axis screw rod 7 to rotate, the X-axis screw rod 7 drives the X-axis movable guide rail 8 to move back and forth in the X-axis direction, the movable frame 4 is fixedly connected with the X-axis movable guide rail 8, and the X-axis movable guide rail 8 moves back and forth in the X-axis direction with the movable frame 4. The structure that the X-axis movable guide rail 8 and the X-axis fixed guide rail 6 move in cooperation is the same as the displacement driving mechanism of the machine tool on the market.

[0045] The first support 2 is fixed on the movable frame 4, the second support 3 is fixed on the rack 1, and the movable frame 4 drives the first support 2 to move back and forth in the X-axis direction, so that the first support 2 can move towards or away from the second support 3.

[0046] When the elongated shaft 16 is installed, the first support 2 moves towards the second support 3, so that the first support 2 and the second support 3 are respectively abutted on the end faces of the two ends of the elongated shaft 16, used for fixing the two ends of the elongated shaft 16, thereby limiting the axial and radial movement of the elongated shaft 16, and positioning the axis of the elongated shaft 16.

[0047] Figure 4 As shown, the end faces of the two ends of the elongated shaft 16 are respectively provided with the center hole 20 with a taper, the first support 2 and the second support 3 are respectively provided with the center pin 10 matched with the shape of the center hole 20 of the end of the elongated shaft 16, and the center pin 10 of the first support 2 and the center pin 10 of the second support 3 are oppositely arranged, when the elongated shaft 16 is installed on the positioning support assembly, the taper of the center hole 20 on the end face of one end of the elongated shaft 16 serves as a guide edge to gather the center pin 10 of the first support 2 on the axis line of the elongated shaft 16, and the taper of the center hole 20 on the end face of the other end of the elongated shaft 16 also serves as a guide edge to gather the center pin 10 of the second support 3 on the axis line of the elongated shaft 16, the center pin 10 of the first support 2 and the center pin 10 of the second support 3 are respectively abutted in the center hole 20 of the end face of the elongated shaft 16 for supporting the elongated shaft 16, in the process of installing the elongated shaft 16, the elongated shaft 16 automatically adjusts the axis by cooperating the center pin 10 with the center hole 20 on the end face, the positioning of the axis of the elongated shaft 16 is completed, and the axis of the elongated shaft 16 is always on the line connecting the center pin 10 of the first support 2 and the center pin 10 of the second support 3. The axis of the elongated shaft 16 installed on the positioning support assembly is parallel to the X-axis.

[0048] The first support 2 and the second support 3 are used for limiting the axial and radial movement of the elongated shaft 16 and positioning the axis of the elongated shaft 16 in cooperation with the center hole 20.

[0049] Preferably, the central hole 20 on the end face of the two ends of the elongated shaft 16 is trumpet-shaped or conical or frustoconical, and the inner wall of the central hole 20 converges to the axis of the elongated shaft 16.

[0050] Figure 3 As shown, the elongated shaft 16 is mounted on the positioning support assembly in a rotating and non-rotating state, and the rack 1 is further provided with a driving rotating member 14, which has a coinciding or non-coinciding state with the elongated shaft 16. The driving rotating member 14 is fixedly connected with a swing arm 15, and the elongated shaft 16 is fixedly connected with a driven rotating member 17. The driving rotating member 14 can drive the driven rotating member 17 through the swing arm 15. When the driving rotating member 14 rotates, it drives the driven rotating member 17 through the swing arm 15, thereby driving the elongated shaft 16 to rotate. The axis of the driving rotating member 14 is not connected with the axis of the elongated shaft 16, and the driving rotating member 14 is only used to drive the elongated shaft 16 to rotate. The axis of the driving rotating member 14 does not affect the positioning of the axis of the elongated shaft 16.

[0051] The driving rotating member 14 and the first support 2 are fixed on the same movable frame 4, the swing arm 15 is fixed on the driving rotating member 14, and the swing arm 15 is eccentric to the axis of the driving rotating member 14. The swing arm 15 has an extension length in the X-axis direction. The driven rotating member 17 is provided with a closed or non-closed slot, or the driven rotating member 17 is provided with a push arm 18. The swing arm 15 leans against the inner wall of the slot or the push arm 18, and the swing arm 15 can freely move in the axial and radial directions relative to the slot or the push arm 18. When the driving rotating member 14 drives the swing arm 15 to eccentrically rotate, the swing arm 15 pushes the driven rotating member 17 to rotate by leaning against the inner wall of the slot or the push arm 18, and then drives the elongated shaft 16 to rotate through the driven rotating member 17. The swing arm 15 can freely move in the axial and radial directions relative to the slot or the push arm 18, so that the vibration of the driving rotating member 14 will not be transmitted to the elongated shaft 16 through the swing arm 15, thereby avoiding affecting the stability and precision of the elongated shaft 16. Moreover, the structure of the swing arm 15 will not affect the positioning of the axis of the elongated shaft 16.

[0052] Figure 4As shown, preferably, the active rotating part 14 is a driven wheel, a bearing 21 is sleeved on the frame 1, the bearing 21 is sleeved outside the first support 2, the driven wheel is sleeved outside the bearing 21 and connected with the outer ring of the bearing 21, the inner ring of the bearing 21 is connected with the first support 2, the frame 1 is provided with a driving motor 11, the driving motor 11 is fixed on the movable frame 4, the output shaft of the driving motor 11 is connected with a driving wheel 12, the driving wheel 12 and the driven wheel are connected with a belt 13 for transmission, the driving motor 11 drives the driven wheel to rotate through the driving wheel 12, the swing arm 15 is fixed on the bottom surface of the driven wheel and is eccentric to the axis of the driven wheel, the driven wheel rotates to drive the swing arm 15 to rotate. Due to the eccentricity between the inner and outer rings of the bearing 21 during rotation, the axis of the active rotating part 14 is eccentric, so that the axis of the active rotating part 14 and the axis of the elongated shaft 16 have two states of coincidence or non-coincidence.

[0053] The above-mentioned driven rotating part 17 is a sleeve ring, the sleeve ring is sleeved on the elongated shaft 16, the sleeve ring can be fixedly connected with the elongated shaft 16 through screws, and the sleeve ring can be tightly connected with the elongated shaft 16.

[0054] Figure 4 As shown, the axial straightening assembly includes two magnetic attractors 5 connected to the frame 1 and having magnetic force, the two magnetic attractors 5 are respectively arranged on the two sides of the elongated shaft 16 in the axial direction, and the magnetic attractors 5 on the two sides respectively apply magnetic attraction force to the two ends of the elongated shaft 16 to straighten the elongated shaft 16 in the axial direction, so as to avoid the bending deformation of the elongated shaft 16 due to the radial force during use. The axial straightening assembly and the axis of the elongated shaft 16 are not connected, the axial straightening assembly only applies magnetic attraction force to the elongated shaft 16, does not affect the positioning of the axis of the elongated shaft 16, and is convenient for improving the precision of the elongated shaft 16.

[0055] Preferably, the magnetic attractors 5 on the two sides are electromagnets, the two ends of the elongated shaft 16 are provided with attracted parts 19 matched with the magnetic force of the electromagnets, the attracted parts 19 can be magnetized, for example, parts made of iron, cobalt, nickel and their alloy materials, the electromagnets on the two sides apply magnetic attraction force to the attracted parts 19 at the ends of the elongated shaft 16 to straighten the elongated shaft 16 in the axial direction. The attracted parts 19 are fixed with the elongated shaft 16 through screws, or are welded on the elongated shaft 16.

[0056] One side of the magnetic attractor 5 and the first support 2 are fixed on the same movable frame 4, the other side of the magnetic attractor 5 is fixed on the frame 1, preferably, the two magnetic attractors 5 are respectively fixed on the first support 2 and the second support 3, the two electromagnets are annular structures, and the two electromagnets are respectively sleeved on the first support 2 and the second support 3 and connected with the first support 2 and the second support 3 through screws.

[0057] The support force of the first support 2 and the second support 3 for supporting the end faces of the elongated shaft 16 is less than the magnetic attraction force of the magnetic attractor 5 to the end of the elongated shaft 16. For example, the support force of the first support 2 and the second support 3 for supporting the end faces of the elongated shaft 16 is set as F1, and the magnetic attraction force of the magnetic attractor 5 to the end of the elongated shaft 16 is set as F2, F1 can be a force of 5 kg, and F2 can be a force of 180 kg. The support force of the first support 2 and the second support 3 for supporting the end faces of the elongated shaft 16 is small, and is only used to limit the radial and axial movement of the elongated shaft 16, so that the elongated shaft 16 is not pressed too tightly, and the rotation of the elongated shaft 16 is not affected. The magnetic attraction force of the magnetic attractor 5 to the elongated shaft 16 is large, so that the magnetic attractor 5 can better pull and tension the elongated shaft 16 to the two sides.

[0058] Figure 6 As shown, the elongated shaft 16 can be a tool for machining a workpiece 23, for example, an electrode rod on an electric spark machine tool or an electrolytic machine tool 22. The elongated shaft straightening and correcting device of the present application can be applied to the electric spark machine tool or the electrolytic machine tool 22 for mounting the elongated electrode rod. The elongated shaft 16 can also be a workpiece mounted on the elongated shaft straightening and correcting device of the present application, and the tool is used to machine the workpiece mounted on the elongated shaft straightening and correcting device.

[0059] In addition, a spring can also be arranged between the movable frame 4 and the first support 2, and the two ends of the spring are connected to the first support 2 and the movable frame 4 respectively. The spring elastically connects the first support 2 to the movable frame 4. When the movable frame 4 drives the first support 2 to move towards the second support 3 for pressing the elongated shaft 16, the spring provides elastic buffering to avoid the first support 2 and the second support 3 from pressing the elongated shaft 16 too tightly.

[0060] In addition, the magnetic attraction force of the magnetic attractor 5 fixed on the first support 2 to the elongated shaft 16 is less than the magnetic attraction force of the magnetic attractor 5 fixed on the second support 3 to the elongated shaft 16. For example, the magnetic attraction force of the magnetic attractor 5 fixed on the first support 2 to the elongated shaft 16 is 180 kg, and the magnetic attraction force of the magnetic attractor 5 fixed on the second support 3 to the elongated shaft 16 is 200 kg. When the first support 2 provides elastic pressing force, the magnetic attractor 5 fixed on the second support 3 can firmly attract one end of the elongated shaft 16 to the second support 3, so as to prevent the axial floating of the elongated shaft 16. The magnetic attraction force of the electromagnet can be controlled by the size of the current.

[0061] Figure 5 As shown, when it is needed to remove the elongated shaft 16 from the device, the movable frame 4 drives the first support 2 and the driving rotating member 14 to move away from the second support 3, so that the first support 2 and the second support 3 do not limit the movement of the elongated shaft 16, and the worker can remove the elongated shaft 16.

[0062] Embodiment two

[0063] Figures 7-13As shown in the drawings, the straightening device for elongated shafts comprises a frame 1, and the frame 1 is provided with a positioning support assembly and an axial straightening assembly.

[0064] Figures 7-9 As shown in the drawings, the elongated shaft 16 is mounted on the positioning support assembly, and the positioning support assembly is used to limit the radial movement of the elongated shaft 16.

[0065] The positioning support assembly comprises a first support 2 and a second support 3, and the first support 2 and the second support 3 are connected to the frame 1 and oppositely arranged, and the first support 2 and the second support 3 are used to limit the radial movement of the elongated shaft 16, so as to position the shaft center of the elongated shaft 16 and prevent the shaft center of the elongated shaft 16 from deviating.

[0066] The frame 1 is fixed with a same-positioned holder 30, and the first support 2 and the second support 3 are fixed on the same-positioned holder 30, and the first support 2 and the second support 3 each comprise a V-shaped groove 26, and the V-shaped groove 26 of the first support 2 and the V-shaped groove 26 of the second support 3 are parallel and correspond in position.

[0067] The same-positioned holder 30 comprises a longitudinal support and two transverse supports fixed on the longitudinal support, and the two transverse supports are parallel and have a spacing, the first support 2 is fixed on one of the transverse supports, the second support 3 is fixed on the other transverse support, and the two transverse supports are each provided with a positioning groove 25, and the positioning groove 25 is V-shaped, the first support 2 and the second support 3 are matched with the positioning groove 25 in shape, the first support 2 and the second support 3 are respectively inserted into the positioning groove 25 on the two transverse supports for positioning, and then the first support 2 and the second support 3 are fixed on the two transverse supports through screws. The positioning groove 25 facilitates positioning the V-shaped groove 26 of the first support 2 and the second support 3.

[0068] The side wall of the elongated shaft 16 is simultaneously pressed against the groove wall of the V-shaped groove 26 of the first support 2 and the groove wall of the V-shaped groove 26 of the second support 3 for positioning the shaft center of the elongated shaft 16.

[0069] Figure 10 As shown in the drawings, the first support 2 and the second support 3 each comprise an anti-extraction piece for preventing the elongated shaft 16 from being separated from the V-shaped groove 26, and when the V-shaped groove 26 of the first support 2 and the V-shaped groove 26 of the second support 3 position the shaft center of the elongated shaft 16, the anti-extraction piece limits the radial movement of the elongated shaft 16.

[0070] The anti-extraction piece comprises a cross-plate 29 connected to the two side walls of the V-shaped groove 26, the cross-plate 29 is provided with a screw hole for inserting a stud 28, one end of the stud 28 is provided with an extrusion end 27 capable of elastically deforming, when the stud 28 is screwed into the V-shaped groove 26, the extrusion end 27 is pressed against the surface of the elongated shaft 16 to tightly press the elongated shaft 16, thereby limiting the radial movement of the elongated shaft 16 in the V-shaped groove 26, and the elongated shaft 16 can be positioned in the shaft center through the V-shaped groove 26 of the first support 2 and the V-shaped groove 26 of the second support 3.

[0071] Preferably, the pressing end 27 is a pressing spring, and the elastic force of the pressing spring presses the elongated shaft 16 against the two side walls of the V-shaped groove 26. The pressing force of the pressing spring can be adjusted by screwing or unscrewing the stud 28, and the pressing spring only provides the pressing force to the elongated shaft 16, without affecting the rotation of the elongated shaft 16.

[0072] The movable frame 4 is movably arranged on the frame 1 in the X-axis direction.

[0073] Figure 7 As shown, specifically, the frame 1 is fixed with an X-axis fixed guide rail 6 and an X-axis motor 9, the X-axis fixed guide rail 6 is slidably connected with an X-axis movable guide rail 8, the output shaft of the X-axis motor 9 is fixedly connected with an X-axis screw rod 7, the X-axis screw rod 7 is sleeved with an X-axis nut, the X-axis movable guide rail 8 is fixedly connected with the X-axis nut, the X-axis screw rod 7 is arranged along the X-axis direction, when the X-axis motor 9 drives the X-axis screw rod 7 to rotate, the X-axis screw rod 7 drives the X-axis movable guide rail 8 to move back and forth in the X-axis direction, the movable frame 4 is fixedly connected with the X-axis movable guide rail 8, and the X-axis movable guide rail 8 moves back and forth in the X-axis direction with the movable frame 4. The structure of the X-axis movable guide rail 8 and the X-axis fixed guide rail 6 moving in cooperation is the same as the displacement driving mechanism of the existing machine tool on the market.

[0074] The axis of the elongated shaft 16 mounted on the positioning and supporting assembly is parallel to the X-axis.

[0075] Figure 10 As shown, the axial straightening assembly includes two magnetic attractors 5 connected to the frame 1 and having magnetic force, the two magnetic attractors 5 are respectively arranged on the two sides of the axis of the elongated shaft 16 in the axial direction, and the two magnetic attractors 5 respectively apply magnetic attraction force to the two ends of the elongated shaft 16 to straighten the elongated shaft 16 in the axial direction to the two sides, so as to avoid the bending deformation of the elongated shaft 16 due to the radial force in use. The axial straightening assembly and the axis of the elongated shaft 16 are not connected in association, the axial straightening assembly only applies magnetic attraction force to the elongated shaft 16, without affecting the positioning of the axis of the elongated shaft 16, so as to facilitate improving the precision of the elongated shaft 16.

[0076] In addition, one of the magnetic attractors 5 and the frame 1 form a blocking component 33 having magnetic force, because the magnetic attraction forces of the two magnetic attractors 5 to the two ends of the elongated shaft 16 are different, the blocking component 33 has a magnetic attraction force greater than that of the other magnetic attractor 5, and the elongated shaft 16 is attracted to the blocking component 33 under the magnetic attraction force of the blocking component 33 to one side, so as to limit the movement of the elongated shaft 16 in the axial direction. For example, the blocking component 33 formed by one of the magnetic attractors 5 and the frame 1 has a magnetic attraction force of 200 kg to the end of the elongated shaft 16, and the other magnetic attractor 5 has a magnetic attraction force of 180 kg to the other end of the elongated shaft 16.

[0077] Preferably, both sides of the magnetic attractor 5 are electromagnets, and the two ends of the elongated shaft 16 are provided with attracted parts 19 that cooperate with the force of the electromagnets, and the attracted parts 19 can be magnetized, such as iron, cobalt, nickel, and alloy materials, and the two sides of the electromagnets apply magnetic attraction to the attracted parts 19 at the ends of the elongated shaft 16 to pull the elongated shaft 16 straight in the axial direction. The magnetic attraction provided by the electromagnets can be controlled by the size of the current. The attracted parts 19 are fixed to the elongated shaft 16 by screws or are welded to the elongated shaft 16.

[0078] One side of the magnetic attractor 5 is fixed to the movable frame 4 and can move relative to the frame 1 in the X-axis direction, and the other side of the magnetic attractor 5 is fixed to the frame 1 with the first support 2 and the second support 3, and preferably, the same-position holding frame 30 is provided with an extension frame 24 that extends outward, and the other side of the magnetic attractor 5 is fixed to the extension frame 24 and is fixed relative to the frame 1, and the magnetic attractor 5 and the extension frame 24 combine to form the above-mentioned blocking part 33.

[0079] The elongated shaft 16 is installed on the positioning support assembly and has two states of rotation and non-rotation, when the elongated shaft 16 can rotate, the frame 1 is also provided with a driving rotating part 14, the driving rotating part 14 has two states of coincidence and non-coincidence with the elongated shaft 16, the driving rotating part 14 is fixedly connected with a swing arm 15, and the elongated shaft 16 is fixedly connected with a driven rotating part 17, the driving rotating part 14 can drive the driven rotating part 17 through the swing arm 15, the driving rotating part 14 drives the driven rotating part 17 through the swing arm 15 when it rotates, thereby driving the driven rotating part 17 to rotate, the driven rotating part 17 drives the elongated shaft 16 to rotate, the axis of the driving rotating part 14 is not connected with the axis of the elongated shaft 16, the driving rotating part 14 is only used to drive the elongated shaft 16 to rotate, and the axis of the driving rotating part 14 does not affect the positioning of the axis of the elongated shaft 16.

[0080] The driving rotating part 14 and one side of the magnetic attractor 5 are fixed to the same movable frame 4, the swing arm 15 is fixed to the driving rotating part 14, the swing arm 15 is eccentric to the axis of the driving rotating part 14, the swing arm 15 has an extension length in the X-axis direction, the driven rotating part 17 is provided with a closed loop or non-closed loop slot hole, or the driven rotating part 17 is provided with a push arm 18, the swing arm 15 leans against the inner wall of the slot hole or the push arm 18, and the swing arm 15 can freely move in the axial and radial directions relative to the slot hole or the push arm 18, when the driving rotating part 14 drives the swing arm 15 to eccentrically rotate, the swing arm 15 pushes the driven rotating part 17 to rotate by leaning against the inner wall of the slot hole or the push arm 18, and then drives the elongated shaft 16 to rotate through the driven rotating part 17. The swing arm 15 can freely move in the axial and radial directions relative to the slot hole or the push arm 18, so that the vibration of the driving rotating part 14 will not be transmitted to the elongated shaft 16 through the swing arm 15, thereby avoiding affecting the stability and precision of the elongated shaft 16, and the structure of the swing arm 15 will not affect the positioning of the axis of the elongated shaft 16.

[0081] Figure 10 As shown, preferably, the active rotating member 14 is a driven wheel, the frame 1 is sleeved with a bearing 21, further, the movable frame 4 is fixed with a central shaft 31, the bearing 21 is sleeved outside the central shaft 31, the driven wheel is sleeved outside the bearing 21 and connected with the outer ring of the bearing 21, the inner ring of the bearing 21 is connected with the central shaft 31, the frame 1 is provided with a driving motor 11, the driving motor 11 is fixed on the movable frame 4, the output shaft of the driving motor 11 is connected with a driving wheel 12, the driving wheel 12 and the driven wheel are connected with a belt 13 for transmission, the driving motor 11 drives the driven wheel to rotate through the driving wheel 12, the swing arm 15 is fixed on the bottom surface of the driven wheel and is eccentric to the axis of the driven wheel, the driven wheel rotates to drive the swing arm 15 to rotate. Due to the eccentricity between the inner and outer rings of the bearing 21 during rotation, the axis of the active rotating member 14 is eccentric, so that the axis of the active rotating member 14 and the axis of the elongated shaft 16 have two states of coincidence or non-coincidence.

[0082] The driven rotating member 17 is a sleeve ring, the sleeve ring is sleeved on the elongated shaft 16, the sleeve ring can be fixedly connected with the elongated shaft 16 through screws, and the sleeve ring can be tightly connected with the elongated shaft 16.

[0083] Figure 13 As shown, the elongated shaft 16 can be a tool for machining workpieces, such as an electrode rod on an electric spark machine tool or an electrolytic machine tool 22, and the elongated shaft straightening and correcting device of the present patent can be applied to the electric spark machine tool or the electrolytic machine tool 22 for installing the elongated electrode rod; the elongated shaft 16 can also be a workpiece, which is installed on the elongated shaft straightening and correcting device of the present patent, and the workpiece installed on the elongated shaft straightening and correcting device is machined by the tool.

[0084] Figure 11 As shown, when it is necessary to remove the elongated shaft 16 from the device, the movable frame 4 drives the magnetic attractor 5 and the active rotating member 14 on one side to move away from the elongated shaft 16, so that one end of the elongated shaft 16 is not blocked, the worker can rotate the stud 28 out of the V-shaped groove 26, so that the jacking spring no longer applies jacking force to the elongated shaft 16, and the worker can remove the elongated shaft 16 from the positioning and supporting assembly.

[0085] Figure 12 As shown, in order to reduce the friction force when the elongated shaft 16 rotates, an axial supporting member 32 is arranged between the end surface of one end of the elongated shaft 16 and the blocking member 33, and when the elongated shaft 16 is attracted to the blocking member 33 by the magnetic attraction force of the blocking member 33 to one side in the axial direction, the axial supporting member 32 is used to contact and connect the elongated shaft 16 and the blocking member 33.

[0086] When the elongated shaft 16 and the blocking member 33 are attracted, the axial support 32 is located at the center of the end surface of the elongated shaft 16, and the contact portion on the axial support 32 is in point contact with the adjacent contact member, and the contact point of the axial support 32 is on the axis of the elongated shaft 16. Preferably, the axial support 32 is fixed on the blocking member 33, and the axial support 32 is in the shape of a hemisphere, a cone or a pyramid, and when the elongated shaft 16 and the blocking member 33 are attracted, the axial support 32 is on the center point of the end surface of the elongated shaft 16 to reduce the friction when the elongated shaft 16 rotates.

[0087] The straightening device for the elongated shaft provided by the present application is introduced above, and the principles and implementation manners of the present application are described by applying specific examples, and the above description of the examples is only used to help understand the present application and the core idea. It should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, the present application can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. Straightening device for elongated shafts, comprising a frame, characterized in that, The rack is provided with a positioning support assembly and an axial straightening assembly, the elongated shaft is installed on the positioning support assembly, and the positioning support assembly is used for limiting the radial movement of the elongated shaft, The axial straightening assembly comprises two magnetic attractors connected to the rack and having magnetic force, the two magnetic attractors are respectively arranged on the two sides of the elongated shaft in the axial direction, the magnetic attractors on the two sides respectively apply magnetic attraction force to the two ends of the elongated shaft to straighten the elongated shaft in the axial direction, the magnetic attractors on the two sides are electromagnets, the two ends of the elongated shaft are provided with attracted parts matched with the magnetic force of the electromagnets, the attracted parts can be magnetized, the electromagnets on the two sides apply magnetic attraction force to the attracted parts at the two ends of the elongated shaft to straighten the elongated shaft in the axial direction, The rack is further provided with a driving rotating part, the driving rotating part has two states of coincidence and non-coincidence with the elongated shaft, the driving rotating part is connected with a swing arm, the elongated shaft is fixed with a driven rotating part, the driving rotating part drives the swing arm to drive the driven rotating part to rotate the elongated shaft, the driving rotating part and the elongated shaft do not have a connection relationship, the driven rotating part is provided with a closed loop or an open loop slot, or the driven rotating part is provided with a push arm, the swing arm is arranged on the inner wall of the slot or the push arm, and the swing arm can move freely in the axial and radial directions relative to the slot or the push arm, and the swing arm can drive the driven rotating part to rotate by pushing the inner wall of the slot or the push arm.

2. Straightening device for elongated shafts according to claim 1, characterized in that The positioning support assembly comprises a first support and a second support, the end faces of the two ends of the elongated shaft are respectively provided with a tapered center hole, the first support and the second support are respectively provided with a center pin matched with the shape of the center hole, and the two center pins are respectively arranged in the center holes of the end faces of the elongated shaft to support the elongated shaft.

3. The straightening device for elongated shafts according to claim 2, characterized in that, The rack is provided with a movable frame, the movable frame can move relative to the rack in the axial direction of the elongated shaft, the first support and the magnetic attractor on one side are fixed on the movable frame, and the second support and the magnetic attractor on the other side are fixed on the rack.

4. The straightening device for elongated shafts of claim 1, wherein, The positioning support assembly comprises a first support and a second support, the first support and the second support each comprise a V-shaped groove, the side wall of the elongated shaft is arranged on the groove wall of the V-shaped groove of the first support and the V-shaped groove of the second support to position the axis of the elongated shaft, and the first support and the second support each comprise an anti-extraction part for preventing the elongated shaft from being separated from the V-shaped groove, The magnetic attractor on one side and the rack form a blocking part with magnetic force, the elongated shaft is attracted to the blocking part to limit the axial movement of the elongated shaft after being pulled by the magnetic attraction force of the blocking part to one side, and the magnetic attraction force of the blocking part on the elongated shaft is greater than the magnetic attraction force of the magnetic attractor on the other side on the elongated shaft.

5. The straightening device for elongated shafts according to claim 4, characterized in that, The anti-extraction part comprises a cross-plate connected to the two side walls of the V-shaped groove, the cross-plate is provided with a threaded hole for inserting a threaded stud, one end of the threaded stud is provided with an extrusion end capable of elastic deformation, and the extrusion end is pressed on the surface of the elongated shaft to limit the separation of the elongated shaft from the V-shaped groove.

6. The straightening device for elongated shafts of claim 4, wherein, The rack is provided with a movable frame, the movable frame can move relative to the rack in the axial direction of the elongated shaft, the first support and the magnetic attractor on one side are fixed on the movable frame, and the second support and the magnetic attractor on the other side are fixed on the rack.

7. The straightening apparatus for elongated shafts of claim 1, wherein, The active rotating part is a driven wheel, a bearing is sleeved on the frame, the driven wheel is sleeved outside the bearing and connected with the outer ring of the bearing, the inner ring of the bearing is connected with the frame, a driving motor is arranged on the frame, an output shaft of the driving motor is connected with a driving wheel, a belt for transmission is connected between the driving wheel and the driven wheel, and the driving motor drives the active rotating part to rotate through the driving wheel.

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