Nut chamfering machine and nut turn-over clamp thereof

Abstract

The utility model relates to the technical field of nut machining, in particular to a nut chamfering machine and a nut turn-over clamp thereof. The nut turn-over clamp of the nut chamfering machine comprises a clamp body with a nut containing cavity, a mounting cavity penetrating through the inner wall of the nut containing cavity is formed in the clamp body, and an elastic clamping mechanism is mounted in the mounting cavity. The elastic clamping mechanism comprises a clamping head capable of stretching out and drawing back relative to the inner wall of the nut containing cavity and an elastic piece exerting acting force towards the nut containing cavity on the clamping head. The clamping head is used for being pushed by the to-be-machined nut to retract in the process that the to-be-machined nut is installed in the nut containing cavity and abutting against and limiting the to-be-machined nut after the to-be-machined nut is installed in place. The nut can be stably located in the nut containing cavity and is not prone to disengagement, in this way, the quick overturning action can be adapted, the clamp body and the nut in the clamp body are driven to overturn at a high speed, the nut cannot be thrown out, and the machining efficiency can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to nut machining technical field, concretely relates to a nut chamfering machine and its nut turning over clamp. BACKGROUND

[0002] The nut is a fastener used in cooperation with the bolt, and in the field of wind power, hydrogen energy and the like, the nut of large specification is one of important components for equipment assembly. When the nut is processed, the two end faces of the nut generally need to be turned and chamfered for improving the assembly property of the nut.

[0003] In order to facilitate the chamfering of the outer edge of the two end faces of the nut, the nut chamfering machine capable of turning over the nut is provided in the prior art, for example, the high-efficiency nut chamfering machine disclosed in the Chinese utility model patent with the authorization announcement No. CN215356193U. The nut chamfering machine comprises a workbench, three jaw chucks, a turning-over clamp, a pushing cylinder, a feeding cylinder and a chamfering mechanism. The workbench is vertically arranged. The three jaw chucks are parallelly fixed on the workbench. An X-direction feeding slide rail is arranged above the three jaw chucks. A Z-direction feeding slide rail is slidably connected to the X-direction feeding slide rail through a sliding block one. The turning-over clamp is slidably connected to the Z-direction feeding slide rail through a sliding block two. The turning-over clamp comprises a clamping assembly and a turning-over gear. The turning-over gear is fixed to the lower side of the sliding block two through a rotating shaft and is rotationally connected to the sliding block two. The clamping assembly is fixed to the end of the rotating shaft away from the sliding block two. A toothed plate is arranged between the X-direction feeding slide rail and the three jaw chucks. The toothed plate is provided with a tooth groove meshing with the turning-over gear. The length of the tooth groove satisfies the rotation of the turning-over gear by 180 degrees. The clamping assembly comprises an upper clamping block and a lower clamping block. The opposite surfaces of the upper clamping block and the lower clamping block are provided with V-shaped grooves matching with the nut. When the nut is chamfered and cut, the nut is clamped to one of the three jaw chucks by the mechanical jaw. The chamfering mechanism moves to the three jaw chuck and chamfers and cuts one end face of the nut. After the processing is completed, the chamfering mechanism retreats. The turning-over clamp moves downward on the Z-direction feeding slide rail until the clamping groove formed by the V-shaped grooves of the upper clamping block and the lower clamping block is opposite to the axis of the three jaw chuck. The three jaw chuck is loosened at the same time. The pushing cylinder drives the pushing block to push the nut into the clamping groove of the clamping assembly. The clamping assembly moves upward by a certain distance and then moves to the other three jaw chuck on the X-direction feeding slide rail. The turning-over gear meshes with the tooth groove on the toothed plate during the movement to realize the turning over by 180 degrees. The nut is thus turned over by 180 degrees. The two end faces are exchanged. When the turning-over clamp moves to the upper side of the other three jaw chuck, the turning-over clamp moves downward so that the clamping groove is opposite to the axis of the three jaw chuck. The feeding cylinder extends to clamp the nut on the three jaw chuck and then retracts. The turning-over clamp moves upward and moves to the first three jaw chuck. At this time, the chamfering mechanism chamfers and cuts the other end face of the nut. After the processing is completed, the three jaw chuck is loosened. The nut falls into the prepared storage box. At the same time, the mechanical jaw clamps another nut to the first three jaw chuck to form a cycle.

[0004] The clamping assembly of the turnover fixture of the nut chamfering machine constitutes a nut turnover fixture, the X-direction feeding slide rail, the slide block one, the Z-direction feeding slide rail, the slide block two, the telescopic cylinder for pushing the slide block one, the telescopic cylinder for pushing the slide block two, the turnover gear, the rotating shaft and the tooth groove on the pressing plate jointly form a turnover mechanism for driving the nut turnover fixture to move from one three-jaw chuck to another three-jaw chuck and realize 180° turnover, and the clamping groove surrounded between the upper clamping block and the lower clamping block of the clamping assembly constitutes a placement cavity for loading the nut to be machined, the nut is pushed into or out of the placement cavity in the axial horizontal state through the cooperation of the cylinder and the push block, wherein the size of the placement cavity is generally larger than the size of the nut, and there is a gap between the outer wall of the nut and the inner wall of the placement cavity, so that the nut can be smoothly pushed into or out of the placement cavity. However, in actual use, the nut to be machined needs to be turned over with the fixture, and in order to avoid the nut from being thrown out of the fixture during turnover, a relatively slow turnover speed is usually required, but this also makes the nut turnover process relatively slow, affecting the processing efficiency. Content of the utility model

[0005] The utility model aims at providing a nut turnover fixture of a nut chamfering machine to solve the problem that the nut turnover fixture of the current nut chamfering machine needs to drive the nut to be machined to turn over at a relatively slow speed, thereby reducing the processing efficiency. The utility model also aims at providing a nut chamfering machine to solve the above problem.

[0006] The technical scheme of the nut turnover fixture of the nut chamfering machine of the utility model is as follows:

[0007] A nut turnover fixture of a nut chamfering machine, comprising a fixture main body with a nut placement cavity, the nut placement cavity has two end openings for the nut to be machined to enter and exit respectively, the fixture main body is provided with a structure for connecting a turnover mechanism to drive the fixture main body and the nut to be machined in the nut placement cavity to turn over, the fixture main body is provided with a mounting cavity penetrating the inner wall of the nut placement cavity, an elastic clamping mechanism is installed in the mounting cavity, the elastic clamping mechanism comprises a clamping head that can extend and retract relative to the inner wall of the nut placement cavity and an elastic member that applies a force to the clamping head towards the nut placement cavity, and the clamping head is used to retract under the push of the nut to be machined during the loading of the nut to be machined into the nut placement cavity and tightly position the nut to be machined after the nut to be machined is loaded in place.

[0008] Beneficial effects: the utility model discloses the nut turning over clamp of nut chamfer processing machine in prior art is improved, through setting up elastic clamping mechanism on the fixture main part, can be fixed with the nut that is carried out chamfer processing in the nut setting chamber, in the process of nut chamfer processing, the chamfer of nut one end face outer edge is processed well, and the nut is transferred to the nut turning over clamp, and from the one end opening of nut setting chamber, in the process of the nut to be processed being loaded into the nut setting chamber, the clamping head of nut top pushing elastic clamping mechanism makes it retract, and the clamping head protrudes to the installation cavity outside the inner wall of nut setting chamber retracts inwards, and the nut is avoided to make the nut to be loaded in place, after the nut is loaded in place in the nut setting chamber, the clamping head keeps and presses on the nut, and the nut can be positioned through the clamping head's tight force, so that the nut can be relatively stably in the nut setting chamber, and it is not easy to come out, which can adapt to the quick turning action, drive the fixture main part and the nut in it to turn over at a relatively fast speed without making the nut be thrown out, and the processing efficiency can be improved.

[0009] Further, the elastic clamping mechanism is provided with two or more than two on the same circumference around the center line of the nut setting chamber.

[0010] Further, the installation cavities of the elastic clamping mechanisms are in the same extension direction.

[0011] Further, the nut setting chamber is used for adapting and clamping the hexagonal nut to be processed, the cross-sectional shape of the nut setting chamber is hexagonal, and the four corners of the nut setting chamber distributed in a rectangular shape are all provided with the elastic clamping mechanism.

[0012] Further, the installation cavity for installing the elastic clamping mechanism is a clamping mechanism installation cavity, the fixture main body is also provided with a positioning mechanism installation cavity penetrating the inner wall of the nut setting chamber, an axial positioning mechanism is installed in the positioning mechanism installation cavity, the axial positioning mechanism comprises a positioning head that can extend and retract relative to the inner wall of the nut setting chamber and an elastic element that applies a force towards the nut setting chamber to the positioning head, the positioning head is used for retracting to avoid the nut to be processed during the process of the nut to be processed being loaded into and unloaded from the nut setting chamber and extending out after the nut to be processed passes, and the axial positioning mechanism is provided with two or more than two in the penetration direction of the nut setting chamber to position the nut to be processed on both sides in the axial direction after the nut to be processed is loaded in place.

[0013] Further, the nut setting chamber has a plane cavity wall adapted to the side surface of the nut to be processed, and the positioning mechanism installation cavity is arranged on the plane cavity wall.

[0014] Further, each positioning mechanism installation cavity is arranged on the same plane cavity wall.

[0015] Further, the elastic clamping mechanism comprises a housing, the elastic member and the clamping head are installed in the housing, the housing has an opening for the clamping head to extend out, and a limiting structure for preventing the clamping head from coming out is arranged at the opening.

[0016] Further, the clamp body is provided with a central hole for adapting to the shape of the nut to be machined, and the central hole constitutes a nut accommodating cavity.

[0017] The technical scheme of the nut chamfering machine is as follows:

[0018] The nut chamfering machine comprises a chamfering mechanism, a nut turning-over clamp and a turning-over mechanism for driving the nut turning-over clamp to turn over, the nut turning-over clamp comprises a clamp body with a nut accommodating cavity, the nut accommodating cavity has two end openings for the nut to be machined to enter and exit respectively, the clamp body is provided with a structure for connecting the turning-over mechanism so that the turning-over mechanism drives the clamp body and the nut to be machined in the nut accommodating cavity to turn over, the clamp body is provided with an installation cavity penetrating the inner wall of the nut accommodating cavity, and an elastic clamping mechanism is installed in the installation cavity, the elastic clamping mechanism comprises a clamping head capable of extending and retracting relative to the inner wall of the nut accommodating cavity and an elastic member for applying a force to the clamping head towards the nut accommodating cavity, and the clamping head is used for retracting under the pushing of the nut to be machined during the process of the nut to be machined being loaded into the nut accommodating cavity and tightly limiting the nut to be machined after the nut to be machined is loaded in place.

[0019] The nut chamfering machine is improved on the basis of the nut turning-over clamp of the nut chamfering machine in the prior art, the elastic clamping mechanism is arranged on the clamp body, the nut to be chamfered and machined loaded into the nut accommodating cavity can be clamped and fixed, after the chamfer of the outer edge of one end surface of the nut is machined during the process of machining the chamfer of the nut, the nut is transferred to the nut turning-over clamp and enters from one end opening of the nut accommodating cavity, the clamping head of the elastic clamping mechanism retracts under the pushing of the nut to be machined during the process of the nut to be machined being loaded into the nut accommodating cavity, the clamping head retracts inward relative to the inner wall of the nut accommodating cavity and avoids the nut to be machined so that the nut to be machined is loaded in place, the clamping head keeps pressing on the nut after the nut is loaded in place in the nut accommodating cavity, the nut to be machined can be limited by the pressing force of the clamping head, the nut to be machined can be relatively stably in the nut accommodating cavity and is not easy to come out, the fast turning-over action can be adapted, the clamp body and the nut in the clamp body can be turned over at a relatively fast speed without the nut being thrown out, and the machining efficiency can be improved.

[0020] Further, the elastic clamping mechanism is provided with more than two positions on the same circumference around the center line of the nut accommodating cavity.

[0021] Further, the installation cavities of the elastic clamping mechanisms are in the same extension direction.

[0022] Furthermore, the nut mounting cavity is used to fit and clamp the hexagonal nut to be processed. The cross-sectional shape of the nut mounting cavity is hexagonal, and the elastic clamping mechanism is provided at each of the four corners of the rectangularly distributed nut mounting cavity.

[0023] Furthermore, the mounting cavity for installing the elastic clamping mechanism is a clamping mechanism mounting cavity. The main body of the clamp is also provided with a positioning mechanism mounting cavity that penetrates the inner wall of the nut placement cavity. An axial positioning mechanism is installed in the positioning mechanism mounting cavity. The axial positioning mechanism includes a positioning head that can extend and retract relative to the inner wall of the nut placement cavity and an elastic element that applies a force toward the nut placement cavity to the positioning head. The positioning head is used to be pushed back by the nut to be processed during the process of the nut to be processed being installed and removed from the nut placement cavity to avoid it, and to extend outward after the nut to be processed has passed it. The axial positioning mechanism is provided at least two times in the through direction of the nut placement cavity to limit the nut to be processed on both sides of its axial direction after it is installed in place.

[0024] Furthermore, the nut mounting cavity has a planar cavity wall adapted to the side of the nut to be processed, and the positioning mechanism mounting cavity is disposed on the planar cavity wall.

[0025] Furthermore, the mounting cavities of each positioning mechanism are located on the same planar cavity wall.

[0026] Furthermore, the elastic clamping mechanism includes a housing, an elastic element, and a clamping head installed inside the housing. The housing has an opening for the clamping head to extend out, and a limiting structure is provided at the opening to prevent the clamping head from dislodging.

[0027] Furthermore, the fixture body is provided with a central hole for adapting to the shape of the nut to be processed, and the central hole forms a nut mounting cavity. Attached Figure Description

[0028] Figure 1 This is a three-dimensional schematic diagram from one side view of Embodiment 1 of the nut chamfering machine of this utility model;

[0029] Figure 2 This is a perspective view of another side of Embodiment 1 of the nut chamfering machine of this utility model;

[0030] Figure 3 for Figure 1 Vertical sectional view of the nut-flipping fixture in the image;

[0031] Figure 4 for Figure 1 A vertical sectional view of the nut-flipping fixture in the state of clamping the nut to be processed;

[0032] Figure 5 for Figure 1 A cross-sectional view of the nut-flipping fixture in the state of clamping the nut to be processed;

[0033] Figure 6 It is the schematic view of spring top bead of embodiment 1 of nut turning over clamp of nut chamfer processing machine of the utility model;

[0034] Figure 7 It is the schematic view of spring top rod of embodiment 2 of nut turning over clamp of nut chamfer processing machine of the utility model.

[0035] In the figure: 100, nut to be processed; 1, clamp main body; 11, nut setting cavity; 21, elastic clamping mechanism; 22, axial positioning mechanism; 201, top head; 202, spring; 203, cylinder. DETAILED DESCRIPTION

[0036] The basic concept of the nut turning over clamp of the nut chamfer processing machine of the utility model is to use the elastic clamping mechanism to clamp and limit the nut, so that the nut can be relatively stably in the nut setting cavity and not easy to fall out, and the fast turning action can be adapted to improve the processing efficiency.

[0037] The utility model will be described below in combination with specific embodiments.

[0038] Embodiment 1 of the nut turning over clamp of the nut chamfer processing machine of the utility model:

[0039] The nut turning over clamp is used to realize the turning and changing operation of the nut to be processed in cooperation with the turning mechanism in the nut chamfer processing process, and after the chamfer processing of the outer edge of one end surface of the nut is completed, the nut is rotated by 180° through turning to realize the chamfer processing of the outer edge of the other end surface. The basic working principle of the nut chamfer processing machine using the nut turning over clamp in the embodiment is the same as that of the nut chamfer processing machine disclosed in the Chinese utility model patent with the authorization announcement number CN215356193U introduced in the background technology, and the nut turning over clamp of the utility model is used to replace the clamping assembly of the nut chamfer processing machine in the background technology.

[0040] Please refer to the patent documents in the background art, the nut chamfering machine includes a workbench, a base, three-jaw chucks, a turnover mechanism, a pushing mechanism, a chamfering mechanism, a feeding mechanism and a nut turning clamp, the workbench is vertically arranged, the base is horizontally arranged, the three-jaw chucks are two and arranged side by side on the workbench, the turnover mechanism is arranged on the front of the workbench and above the three-jaw chucks, the turnover mechanism is connected with the nut turning clamp, the turnover mechanism is used for driving the nut turning clamp to move from the left three-jaw chuck to the right three-jaw chuck and to realize 180° turnover of the nut turning clamp in the moving process, that is, the nut turning clamp can change from the state of one side facing the left three-jaw chuck to the state of the other side facing the right three-jaw chuck, and the specific structure can refer to the background art. The pushing mechanism is arranged on the workbench, and the central passage of the left three-jaw chuck can be used to push the nut, of which one end face chamfering machining is completed, away from the three-jaw chuck and to the nut turning clamp, the chamfering mechanism has a tool for machining chamfering, and the chamfering mechanism is arranged on the base and can move left and right to adapt to the left and right two three-jaw chucks, and the feeding mechanism is arranged on the base and can be telescoped forward and backward to push the nut in the nut turning clamp to the right three-jaw chuck.

[0041] When the nut chamfering cutting is performed, the nut to be machined is first placed on the left three-jaw chuck by using the mechanical claw, the chamfering mechanism moves to the three-jaw chuck and performs chamfering cutting on one end face of the nut, after the machining is completed, the chamfering mechanism retreats, the turnover mechanism drives the nut turning clamp to move to the position opposite to the center of the three-jaw chuck, the three-jaw chuck is loosened at the same time, the pushing mechanism pushes the nut into the nut turning clamp, and then moves to the right three-jaw chuck, and realizes 180° turnover in the moving process, so that the nut is turned by 180° and the two end faces are exchanged, when moving to the right three-jaw chuck, the feeding mechanism is elongated to push the nut from the nut turning clamp to the right three-jaw chuck, then the feeding mechanism is retracted, the turnover mechanism can drive the nut turning clamp to move away and return to the left three-jaw chuck, the chamfering mechanism moves to the right three-jaw chuck to perform chamfering cutting on the other end face of the nut, after the machining is completed, the right three-jaw chuck is loosened, and the nut can fall into the prepared storage box.

[0042] The utility model discloses the nut turning clamp of nut chamfering machine is improved, such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4As shown, the nut turning-over clamp of the nut chamfering machine comprises a clamp body 1 with a nut accommodating cavity 11 having two end openings for the nut 100 to be machined to enter and exit respectively, and the clamp body 1 is provided with a structure for connecting a turning-over mechanism to drive the clamp body 1 to turn over with the nut 100 to be machined in the nut accommodating cavity 11, and the clamp body 1 is provided with a clamping mechanism mounting cavity penetrating through the inner wall of the nut accommodating cavity 11, and a resilient clamping mechanism 21 is mounted in the clamping mechanism mounting cavity, which comprises a clamping head capable of extending and retracting relative to the inner wall of the nut accommodating cavity 11 and a resilient member for applying force to the clamping head towards the nut accommodating cavity 11, and the clamping head is used to retract under the push of the nut 100 to be machined during the process of the nut 100 to be machined being loaded into the nut accommodating cavity 11 and to tightly position the nut 100 to be machined after the nut 100 to be machined is loaded into place.

[0043] During the process of chamfering the nut, after the chamfering of the outer edge of one end face of the nut clamped by the left three-jaw chuck is completed, the nut is pushed away from the three-jaw chuck by the pushing mechanism and pushed into the nut turning-over clamp from one end opening of the nut accommodating cavity 11. During the process of the nut 100 to be machined being loaded into the nut accommodating cavity 11, the clamping head of the resilient clamping mechanism 21 is retracted under the push of the nut 100 to be machined, the clamping head protruding outward from the clamping mechanism mounting cavity relative to the inner wall of the nut accommodating cavity 11 is retracted inward, the resilient member is compressed, the nut is avoided to make the nut loaded into place, and the clamping head is kept pressing on the nut under the resetting action of the resilient member after the nut is loaded into place in the nut accommodating cavity 11. The nut can be positioned by the clamping force of the clamping head, so that the nut can be relatively stably in the nut accommodating cavity 11 and not easily fall out, which can adapt to the fast turning-over action to drive the clamp body 1 and the nut in it to turn over at a relatively fast speed without the nut being thrown out, so as to improve the machining efficiency. When the nut is sent to the right three-jaw chuck, the nut is pushed out from the other end opening of the nut accommodating cavity 11 by the feeding mechanism and sent to the right three-jaw chuck for clamping, and then the chamfering of the other end face of the nut can be performed.

[0044] The shape of the nut accommodating cavity 11 is adapted to the shape of the nut 100 to be machined, the nut accommodating cavity 11 penetrates through front and back, has two openings in front and back and a center line extending in front and back, and the upper surface of the clamp body 1 is provided with a structure for connecting a turning-over mechanism, which can be fixedly connected with the rotating shaft of the turning-over mechanism by welding to drive the clamp body 1 to rotate when the rotating shaft rotates.

[0045] The elastic clamping mechanisms 21 are arranged at multiple positions on the same circumference around the center line of the nut accommodating cavity 11, forming multi-point clamping, and the use of the elastic clamping mechanisms 21 at the same circumference facilitates the centering of the nut. In other embodiments, only one elastic clamping mechanism can be arranged at the same circumference around the center line of the nut accommodating cavity, which presses the nut against the inner wall of the nut accommodating cavity on the other side. In other embodiments, there can be more than three elastic clamping mechanisms on the same circumference.

[0046] The clamping mechanism mounting cavities where the elastic clamping mechanisms 21 are located extend in the same direction, i.e., the left-right direction, facilitating processing. Each clamping mechanism mounting cavity is arranged on the left or right side wall of the clamping body, and the clamping mechanism mounting cavity is in communication with the nut accommodating cavity 11 inwardly and extends to the outer wall surface of the clamping body 1 in the left-right direction outwardly. In other embodiments, the clamping mechanism mounting cavities on the same circumference can extend in different directions, for example, the four clamping mechanism mounting cavities are distributed radially around the center, and correspondingly, the clamping head is clamped towards the center of the nut.

[0047] The nut to be processed in this embodiment is a hexagonal nut, which has two end faces and six side faces. The nut accommodating cavity 11 is used to fit and clamp the hexagonal nut to be processed, and the cross-sectional shape of the nut accommodating cavity 11 is a regular hexagon, which has six corners, including the left two corners, the right two corners, and the upper and lower two corners. The four corners of the nut accommodating cavity 11 that are distributed in a rectangular shape are provided with elastic clamping mechanisms 21, i.e., the left two corners and the right two corners on the opposite side face edges. Each elastic clamping mechanism 21 exerts a clamping force on the corner of the nut, facilitating the centering of the nut and improving the positioning effect on the nut. In other embodiments, the elastic clamping mechanism can be directly opposite the nut clamped on the side face. In other embodiments, a four-corner nut can be processed, and the shape of the nut accommodating cavity is adjusted accordingly.

[0048] The clamping mounting cavities are left-right through, and the left and right side walls of the clamping body 1 are respectively provided with four clamping mounting cavities. Correspondingly, the nut can be clamped by the left four elastic clamping mechanisms 21 and the right four elastic clamping mechanisms 21, and the left and right four elastic clamping mechanisms 21 are respectively distributed in a rectangular shape, and at the same time, four elastic clamping mechanisms 21 on the same circumference around the center line of the nut accommodating cavity 11 are distributed in a rectangular shape, ensuring reliable clamping of the nut.

[0049] In combination with Figure 6The elastic clamping mechanism 21 in the embodiment adopts a spring top bead, which includes a top head 201, a spring 202, and a barrel 203. The top head 201 is a ball, which constitutes a clamping head. The spring 202 constitutes an elastic member. The barrel 203 constitutes a housing. The elastic member and the clamping head are installed in the housing. The barrel opening of the barrel 203 constitutes an opening of the housing for the clamping head to extend out. A limiting structure is arranged at the opening to prevent the clamping head from coming out. The limiting structure is usually a necked structure at the barrel opening of the barrel 203. The spring top bead is a mature technology, and its specific structure is not described herein. The barrel 203 is fixedly installed in the clamping mechanism installation cavity. When not subjected to external force, the ball protrudes from the inner wall of the nut accommodating cavity 11. When the nut is installed, the ball can retract. The use of a separate spring top bead as the elastic clamping mechanism 21 facilitates disassembly and assembly. In other embodiments, the barrel can not be provided. The elastic clamping mechanism includes a top bead, a spring, and a plug. The top bead, the spring, and the plug are directly installed in the clamping mechanism installation cavity. The inner end opening of the clamping mechanism installation cavity is a necked structure to limit the top bead while protruding. The plug is fixed to the side of the spring away from the top bead to maintain the compressed state of the spring.

[0050] The clamp body 1 is a block. The clamp body 1 is provided with a central hole for adapting to the shape of the nut 100 to be machined. The central hole constitutes a nut accommodating cavity 11. The structure is simple, and the elastic clamping mechanism 21 is easy to set. In other embodiments, the clamp body can also be a frame structure having an upper support and a lower support and a connecting rod connecting the upper and lower supports. The elastic clamping mechanism is arranged on the upper support and the lower support.

[0051] The clamp body 1 is also provided with a positioning mechanism installation cavity penetrating through the inner wall of the nut accommodating cavity 11. An axial positioning mechanism 22 is installed in the positioning mechanism installation cavity. Figure 5 The axial positioning mechanism 22 includes a positioning head that can extend and retract relative to the inner wall of the nut accommodating cavity 11 and an elastic member that applies a force to the positioning head towards the nut accommodating cavity 11. The positioning head is used to retract under the push of the nut 100 to be machined during the installation and removal of the nut 100 to be machined into the nut accommodating cavity 11 to avoid the nut. After the nut 100 to be machined passes, the positioning head extends outward. The axial positioning mechanism 22 is spaced apart in the penetrating direction of the nut accommodating cavity 11 to limit the nut 100 to be machined on both sides in the axial direction after the nut 100 to be machined is installed in place. The distance between the two axial positioning mechanisms 22 is slightly greater than the axial dimension d of the nut. After the nut 100 to be machined is installed in place in the nut accommodating cavity 11, it is clamped between the positioning heads of the two axial positioning mechanisms 22. The positioning heads on both sides are axially limited by cooperating with the two end faces on both sides of the nut. The axial position of the nut is maintained, and the clamping stability is improved. In other embodiments, the axial positioning mechanism can not be provided, and only the elastic clamping mechanism is used for clamping and fixing. In other embodiments, two axial positioning mechanisms can be respectively arranged on the left and right side walls of the clamp body.

[0052] The nut accommodating cavity 11 has a plane cavity wall matched with the side surface of the nut 100 to be machined, and correspondingly, the nut accommodating cavity 11 in the embodiment has six plane cavity walls, the positioning mechanism mounting cavities are arranged on the plane cavity walls, and the two axial positioning mechanisms 22 are located between the upper two elastic clamping mechanisms 21 and the lower two elastic clamping mechanisms 21 on the side wall of the side clamp body 1, which is beneficial to the reliable axial stop cooperation with the nut.

[0053] The positioning mechanism mounting cavities where the respective axial positioning mechanisms 22 are located are arranged on the same plane cavity wall, and the plane cavity wall is located on one side wall in the left-right direction of the clamp body 1, which is convenient for machining and uniform in applying force to the nut. In other embodiments, one of the axial positioning mechanisms can be arranged on the left side wall of the clamp body, and the other axial positioning mechanism can be arranged on the right side wall of the clamp body.

[0054] The axial positioning mechanism 22 in the embodiment also adopts a spring top ball, and correspondingly, the positioning head is a ball of the spring top ball, and the elastic member is a spring 202, so that the positioning head is telescopic relative to the inner wall surface of the nut accommodating cavity, and cost is saved.

[0055] In use, the nut is placed in the nut accommodating cavity, the side surface of the nut is in contact with the ball and is extruded, the ball is telescopic under the action of the spring, the elastic clamping mechanisms cooperate to clamp the nut, and the nut is pushed to between the two axial positioning mechanisms until the two axial positioning mechanisms cooperate to stop and position the end surface of the nut. The nut is clamped and fixed to prevent movement during turning, so that the nut is smoothly transferred, and the subsequent machining of the nut is ensured.

[0056] Embodiment 2 of the nut turning clamp of the nut chamfering machine:

[0057] The difference between the embodiment and the above-mentioned embodiment 1 is the form of the elastic clamping mechanism and the axial positioning mechanism, and in the embodiment, as shown in Figure 7 the elastic clamping mechanism and the axial positioning mechanism adopt an elastic top rod, the principle is the same as that of the spring top ball, and the difference lies in the shape of the top head. The elastic top rod comprises a top head 201, a spring 202 and a barrel 203, the top head 201 and the spring 202 are installed in the barrel 203, the top head 201 is a hollow rod body, the top head 201 is used to form a clamping head or a positioning head, the spring 202 is in abutment at both ends of the barrel 203 and the top head 201, and the hollow rod body is sleeved outside the spring 202, and a spherical surface structure is arranged at the outer end of the hollow rod body to adapt to contact the nut to be machined.

[0058] Embodiment of the nut chamfering machine:

[0059] The nut chamfering machine comprises a chamfering mechanism, a nut turning-over clamp and a turning-over mechanism for driving the nut turning-over clamp to turn over.

[0060] Finally, it needs to be explained that the above-mentioned is only the preferred embodiment of the present application, and is not used to limit the present application, although the present application is described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical solutions recorded in the foregoing embodiments without paying the creative labor, or make equivalent replacement for part of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A nut-flipping fixture for a nut chamfering machine, comprising a fixture body having a nut-receiving cavity, the nut-receiving cavity having two openings for the nut to be processed to enter and exit respectively, and the fixture body having a structure for connecting a flipping mechanism so that the flipping mechanism can drive the fixture body and the nut to be processed in its nut-receiving cavity to flip, characterized in that... The fixture body is provided with an installation cavity penetrating the inner wall of the nut accommodating cavity, and the installation cavity is provided with an elastic clamping mechanism.

2. The nut turning jig for the nut chamfering machine according to claim 1, wherein The elastic clamping mechanism is provided with two or more positions on the same circumference around the center line of the nut accommodating cavity.

3. The nut turning jig for the nut chamfering machine according to claim 2, wherein The installation cavities of the elastic clamping mechanisms are in the same extension direction.

4. The nut turning jig for the nut chamfering machine according to claim 2 or 3, wherein The nut accommodating cavity is used for accommodating the hexagonal nut to be machined, and the cross section of the nut accommodating cavity is hexagonal.

5. The nut turning jig for the nut chamfering machine according to claim 1 or 2 or 3, wherein The installation cavity for installing the elastic clamping mechanism is a clamping mechanism installation cavity, and the fixture body is further provided with a positioning mechanism installation cavity penetrating the inner wall of the nut accommodating cavity.

6. The nut turning jig for the nut chamfering machine according to claim 5, wherein The nut accommodating cavity is provided with a plane cavity wall matched with the side surface of the nut to be machined, and the positioning mechanism installation cavity is arranged on the plane cavity wall.

7. The nut turning machine according to claim 6, wherein the nut turning jig is characterized by, Each positioning mechanism installation cavity is arranged on the same plane cavity wall.

8. The nut turning jig for the nut chamfering machine according to claim 1 or 2 or 3, wherein The elastic clamping mechanism comprises a shell, and the elastic member and the clamping head are installed in the shell.

9. The nut turning jig for the nut chamfering machine according to claim 1 or 2 or 3, wherein The fixture body is provided with a center hole matched with the shape of the nut to be machined, and the center hole constitutes the nut accommodating cavity.

10. A nut chamfering machine comprising a chamfering mechanism, a nut turning jig, and a turning mechanism for driving the nut turning jig to turn, characterized by The nut flipping fixture is the nut flipping fixture according to any one of claims 1-9.

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