A gear hobbing machine for processing crystal fixture needles

Abstract

The present invention relates to the field of mechanical processing, and in particular to a gear hobbing machine for processing crystal fixture needles. A gear hobbing machine for processing crystal fixture needles comprises a frame, and a feeding mechanism, a loading mechanism, a clamping rotating device and a gear hobbing mechanism arranged on the frame. On the one hand, the scheme adopts the method of feeding along the axis to feed the crystal fixture needle into the interior of the drive shaft assembly, which can ensure the continuity of the crystal fixture needle feeding processing, eliminate the more complicated clamping structure and process, and improve the processing efficiency. On the other hand, the lateral feed amount and longitudinal processing surface of the gear hobbing cutter can be adjusted in real time to make full use of the gear hobbing cutter, improve utilization efficiency and reduce costs.

Description

Technical Field

[0001] The invention relates to the field of mechanical processing, in particular to a gear hobbing machine tool for processing crystal fixture needles. Background Art

[0002] Crystal clamps, also known as gemstone clamps and rhinestone clamps, are used in gemstone processing equipment and are an important part of the rhinestone machine. During the gemstone processing process, the gemstone clamps fix the raw materials such as rhinestones and gemstones on the one hand, and on the other hand, the mirror surface of gemstones, rhinestones and other gemstones is transformed through the action of the clamps. Therefore, the quality of gemstones and rhinestones processed by gemstone processing equipment is closely related to the overall accuracy and stability of the clamp, and the overall accuracy and stability of the clamp are mainly guaranteed by the performance of its transmission mechanism; the specific structure of the crystal clamp can refer to the scheme recorded in the Chinese utility model patent with announcement number "CN205703741U".

[0003] A fixture needle is set in the crystal fixture. The crystal fixture needle is an important component of the crystal fixture. Its needle head is mainly used to fix crystals such as crystals and rhinestones. When the crystal is polished, the needle body rotates to achieve the conversion of the crystal's angular surface. Therefore, the precision of the needle directly affects the quality of the processed crystal. The existing fixture needle can refer to the gem fixture needle recorded in the Chinese utility model patent with the announcement number "CN204308712U". Needle teeth need to be constructed on the inner end of the fixture needle to mesh with the worm of the input power, so that the worm drives the fixture needle to rotate to adjust the conversion of the crystal's angular surface.

[0004] When constructing the above-mentioned crystal fixture needle, a gear hobbing machine is used. The gear hobbing cutter is driven to rotate by a driving motor on the gear hobbing machine. The structure of the gear hobbing cutter can refer to the structure recorded in patents with announcement numbers CN214557974U, CN217551339U, etc. The structure of the existing gear hobbing machine can refer to the multifunctional CNC gear hobbing machine recorded in announcement number "CN210475751U". In this scheme, the workpiece is clamped by a rotating chuck. When the rotating chuck drives the workpiece to rotate, the gear hobbing cutter cuts the workpiece.

[0005] For gear hobbing of a mandrel similar to the crystal fixture needle mentioned above, reference may be made to the automatic gear hobbing device for a mandrel recorded in the Chinese invention patent publication with announcement number "CN106736805A", comprising: a feeding device and a gear hobbing device, the gear hobbing device comprising a gear hobbing seat, and a hydraulic chuck, an ejector pin and a gear hobbing cutter connected to the gear hobbing seat, the hydraulic chuck and the ejector pin being coaxially arranged for clamping the mandrel, the axis of the hydraulic chuck and the ejector pin being the clamping axis; the feeding device comprising a feeding device body detachably connected to the gear hobbing device and a discharging mechanism, a material preparation mechanism and a feeding mechanism arranged on the feeding device body; the discharging mechanism comprising a material storage bin, a discharging guide rail, a discharging cylinder and a discharging movable plate; the material preparation mechanism comprising a first material preparation area, a second material preparation area, a material preparation cylinder and a material preparation baffle; the feeding mechanism comprising a transverse feeding mechanism, a longitudinal feeding mechanism and a material clamping portion.

[0006] Obviously, the structure of the above-mentioned automatic gear hobbing device of the mandrel is complex, especially the feeding and loading structure of the mandrel (which is cylindrical like the crystal clamp needle in this case), which leads to high operating cost but low efficiency of the equipment.

[0007] Furthermore, when the gear hobbing machine is processing, the gear hobbing cutter will wear out, which will affect the subsequent cutting depth on the one hand, and also need to be replaced regularly on the other hand. At present, the utilization rate of the gear hobbing cutter on the gear hobbing machine is low. On the cutting surface of the gear hobbing cutter (the same axial position), when the blade of the gear hobbing cutter is worn and the cutting depth cannot be guaranteed, it cannot continue to be used. The gear hobbing cutter can only be manually adjusted axially to cut at different positions. The utilization rate of the gear hobbing cutter is low and it is inconvenient to replace it. Summary of the invention

[0008] In order to solve the above problems, the object of the present invention is to provide a gear hobbing machine for processing crystal fixture needles, which has high processing efficiency and high utilization rate of the gear hobbing cutter.

[0009] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0010] A gear hobbing machine tool for processing crystal fixture needles comprises a frame, and a feeding mechanism, a loading mechanism, a clamping rotating device and a gear hobbing mechanism arranged on the frame; the characteristics are:

[0011] The clamping and rotating device comprises a driving shaft assembly rotatably arranged on a frame, an axial hole penetrating through both axial ends of the driving shaft assembly is arranged at the axis of the driving shaft assembly, and a clamping mechanism for clamping and fixing the crystal clamp needle in the axial hole is connected to the driving shaft assembly; the end of the feeding mechanism is located on the axis extension line of the rear end of the driving shaft assembly, the loading mechanism is used to push the crystal clamp needle fed by the feeding mechanism into the axial hole of the driving shaft assembly, and the processing end of the gear hobbing mechanism is located on the axis extension line of the front end of the driving shaft assembly;

[0012] A movable bracket is arranged on the frame, and a gear hobbing mechanism is arranged on the movable bracket, the gear hobbing mechanism comprises a gear hobbing drive motor, and a gear hobbing cutter connected to the output end of the gear hobbing drive motor; the movable bracket comprises a horizontal moving table, a longitudinal moving table, a transverse drive motor for driving the horizontal moving table to move, and a longitudinal drive motor for driving the longitudinal moving table to move; the transverse drive motor drives the gear hobbing cutter in the gear hobbing mechanism to move in a radial direction relative to the crystal fixture needle, so as to adjust the cutting depth of the gear hobbing cutter on the crystal fixture needle; the longitudinal drive motor drives the gear hobbing cutter in the gear hobbing mechanism to move in a radial direction relative to the crystal fixture needle, so as to adjust the axial processing position of the gear hobbing cutter.

[0013] The present invention adopts the above technical solution, which relates to a gear hobbing machine for processing crystal fixture needles. The feeding mechanism in the gear hobbing machine is used to feed the crystal fixture needles, the loading mechanism is used to feed the crystal fixture needles into the clamping rotating device, the clamping rotating device is used to fix the crystal fixture needles and rotate them, and the gear hobbing mechanism performs cutting and gear hobbing processing on the crystal fixture needles during high-speed rotation. With the above structure, the gear hobbing machine has the following advantages:

[0014] 1. The clamping and rotating device in the crystal clamp needle feeding structure includes a driving shaft assembly and a clamping mechanism. An axial hole is set at the axis of the driving shaft assembly for inserting the crystal clamp needle, and the clamping mechanism is used to fix the crystal clamp needle inside the axial hole. When in use, the feeding mechanism first conveys the crystal clamp needle to the axis extension line at the rear end of the driving shaft assembly, and then the feeding mechanism is used to push the crystal clamp needle into the axial hole of the driving shaft assembly until the front end of the crystal clamp needle extends out of the other end of the axial hole and is in the gear rolling processing position. At this time, the clamping mechanism fixes the crystal clamp needle in the axial hole, the driving shaft assembly drives the crystal clamp needle to rotate, and the gear rolling mechanism performs gear rolling processing on the crystal clamp needle. This structure uses the method of feeding along the axis to feed the crystal clamp needle into the driving shaft assembly. When the next crystal clamp needle is fed in after the previous crystal clamp needle is processed, the previous crystal clamp needle can be ejected from the axial hole to achieve unloading. Thereby, the continuity of the crystal fixture needle feeding process can be ensured, the relatively complicated clamping structure and process can be omitted, and the processing efficiency can be improved.

[0015] 2. The gear hobbing mechanism arranged on the movable bracket can move in the lateral and longitudinal directions to realize the advance and retreat of the gear hobbing cutter, so as to realize the cutting of the needle teeth on the crystal fixture needle. Furthermore, in the cutting process of this scheme, the PCL controller can further control the lateral drive motor and the longitudinal drive motor. Based on the detection judgment or the system preset, the lateral drive motor drives the gear hobbing cutter to move in the radial direction relative to the crystal fixture needle. In this way, when the gear hobbing cutter is worn after a certain number of circles, the lateral drive motor can control the feed amount of the gear hobbing cutter and adjust it in real time to overcome the problem of insufficient cutting groove depth on the workpiece caused by the wear of the gear hobbing cutter, so that the gear hobbing cutter can be fully utilized, the utilization efficiency can be improved and the cost can be reduced. Furthermore, when the cutting teeth at the same axial position of the gear hobbing cutter cannot be used anymore due to wear, the longitudinal drive motor drives the gear hobbing cutter to move axially, thereby adjusting the processing position of the gear hobbing cutter, so that manual adjustment is not required, and it is more convenient to use.

[0016] Preferably, the feeding mechanism includes two material brackets arranged opposite to each other, and a receiving groove arranged on the axis extension line of the rear end of the driving shaft assembly; a material groove for storing the crystal clamp needle is formed between the two material brackets, and a feeding channel for guiding the crystal clamp needle into the material groove is constructed on the two material brackets. When loading, the crystal clamp needle needs to be manually placed inside the material groove, and at least two ends of the crystal clamp needle are supported by the two material brackets. Under the guidance of the feeding channel, the crystal clamp needle can fall into the receiving groove, and then be on the axis extension line of the rear end of the driving shaft assembly.

[0017] In a further preferred embodiment, the feed channel is connected to the lower end of the material trough, and the lower end surface of the material trough of the material bracket is constructed as an inclined surface facing the feed channel. In this embodiment, the inclined surface at the lower end of the material trough can cause the crystal fixture needles to roll down and gather into the feed channel.

[0018] In a further solution, the frame is further provided with a dredging assembly, which includes a support rod and a support driving assembly for driving the support rod to move up and down longitudinally; the support rod is located below the material trough between the two material brackets. This solution provides a dredging assembly, a support rod is provided below the material trough, and the support driving assembly intermittently lifts the support rod so that the support rod extends into the material trough, thereby avoiding the situation where multiple crystal fixture needles are stuck and cannot be fed in.

[0019] In a specific implementation scheme, the support driving assembly includes a support driving motor and a cam connected to the output shaft of the support driving motor; the support rod is slidably arranged on the frame, and a roller that rolls against the cam surface is arranged at the lower end of the support rod. In this scheme, the support driving motor drives the cam to rotate, and the roller at the lower end of the support rod moves against the cam surface, and rises and falls with the operation of the cam, thereby intermittently lifting the support rod.

[0020] Preferably, a limit baffle is provided on the movable bracket, and the limit baffle can move with the movable bracket to the axis extension line of the front end of the driving shaft assembly to limit the extension position of the crystal clamp needle. In this solution, the limit baffle can control the extension amount of the crystal clamp needle relative to the shaft hole, thereby ensuring that the gear hobbing mechanism processes the crystal clamp needle in the correct position.

[0021] Preferably, the feeding mechanism includes a feeding push rod arranged along the axial extension direction of the driving shaft assembly, and a feeding drive assembly driving the feeding push rod to move back and forth; the feeding drive assembly is a servo feeding pair, and a feeding push head is arranged on the moving part of the servo feeding pair, and the feeding push rod is arranged on the feeding push head; the feeding push head includes a cylinder, a spring arranged inside the cylinder, and a connector movably arranged in the cylinder and elastically supported; the feeding push rod is plugged into the connector. In this scheme, the connector in the feeding push head is used to plug the feeding push rod, and the inner end of the connector is elastically supported. When the front end of the feeding push rod encounters resistance, the connector retreats relative to the cylinder and the spring is compressed. The scheme of elastically pushing the crystal fixture needle can avoid damage caused by the forced pushing of the feeding push rod when the limit baffle blocks the movement of the crystal fixture needle.

[0022] Preferably, the horizontal moving platform is arranged on the frame for lateral movement, a connecting seat is arranged on the horizontal moving platform, the longitudinal moving platform is arranged on the connecting seat for longitudinal movement, and the gear hobbing mechanism is arranged on the longitudinal moving platform; in this scheme, the output end of the lateral driving motor is connected to the horizontal moving platform to drive the horizontal moving platform to move lateral on the frame; the output end of the longitudinal driving motor is connected to the longitudinal moving platform to drive the longitudinal moving platform to move longitudinally on the frame. In a specific implementation scheme, the lateral driving motor uses a screw assembly to connect the horizontal moving platform, and the longitudinal driving motor uses a screw assembly to connect the longitudinal moving platform. The driving method of the screw assembly is a prior art and is not described here.

[0023] The gear hobbing mechanism is limitedly rotatably arranged on the longitudinal moving platform, and the gear hobbing mechanism can rotate circumferentially along its rotation axis relative to the longitudinal moving platform to adjust the angle between the gear hobbing cutter axis and the crystal fixture needle axis. In this scheme, the gear hobbing mechanism can be rotated to adjust the above angle, thereby changing the angle of the needle groove constructed on the surface of the crystal fixture needle to meet the subsequent crystal angular surface adjustment requirements.

[0024] In a specific solution, the longitudinal moving platform is connected to a mounting seat via a rotating shaft, and a gear hobbing mechanism is arranged on the mounting seat; an arc-shaped hole centered on the axis of the rotating shaft is constructed on the longitudinal moving platform, and a locking component that penetrates the arc-shaped hole is connected to the mounting seat. When the locking component is loosened, the gear hobbing mechanism can rotate along the rotating shaft as the center; after rotating to a suitable position, the locking component can be fixed to fix the processing angle. Furthermore, the angle can be marked along the edge of the arc-shaped hole, so as to facilitate the control of the angle during the adjustment process.

[0025] Preferably, the clamping mechanism includes a plurality of clamping petals which are arranged on the driving shaft assembly and spaced apart circumferentially along the shaft hole, and the plurality of clamping petals can be radially retracted or separated to clamp or loosen the crystal clamp needle in the shaft hole; the driving shaft assembly includes a central shaft, and an outer shaft rod which is sleeved on the outside of the central shaft; the shaft hole is arranged on the central shaft, and the outer shaft rod is axially movable with the central shaft, and the clamping mechanism also includes a swinging mechanism for driving the outer shaft rod to move axially; the plurality of clamping petals are installed in the outer shaft rod and cooperate with the wedge-shaped inclined surface of the outer shaft rod, and when the outer shaft rod moves axially relative to the central shaft, the plurality of clamping petals are driven to radially retract or separate.

[0026] An axial hole is arranged at the axis of the driving shaft assembly in the clamping rotating device, and the axial hole is used to pass the crystal clamp needle. The clamping mechanism is used to fix the crystal clamp needle inside the axial hole, so that the crystal clamp needle is driven to rotate together with the driving shaft assembly when it rotates.

[0027] In a specific scheme, the driving shaft assembly includes a central shaft and an outer shaft rod. When the swing mechanism drives the outer shaft rod to move axially relative to the central shaft, the multiple clamping petals cooperate with the wedge-shaped inclined surface of the outer shaft rod, thereby driving the multiple clamping petals to radially contract or separate, thereby realizing the clamping and loosening of the crystal clamp needle.

[0028] With the above structure, the outer shaft rod sleeved on the central shaft can move axially to achieve the clamping and fixing of the crystal fixture needle, thereby achieving good compatibility between workpiece clamping and rotation drive, with a simplified structure and stable operation.

[0029] In a specific implementation, the outer shaft is circumferentially linked with the central shaft, and the driving mechanism drives the outer shaft; the driving mechanism includes a pulley sleeved on the outer shaft, and a driving motor driving the pulley through a belt. In this solution, the outer shaft is circumferentially linked with the central shaft, and the driving motor drives the pulley and the outer shaft connected to it to rotate through the belt, thereby driving the central shaft and the crystal fixture needle inside the shaft hole to rotate.

[0030] In the above scheme, the outer shaft can move axially relative to the central shaft but is linked in the circumferential direction. Specifically, the following scheme can be adopted: radially arranged and matching ribs and grooves are respectively constructed on the inner wall of the outer shaft and the outer wall of the central shaft, and the ribs and grooves are extended along the axial direction, so that the circumferential linkage is achieved based on the cooperation of the ribs and grooves. The ribs can move in the grooves to achieve axial movement.

[0031] In a further solution, the swing mechanism includes a swing ring arranged around the outer shaft and hinged on the frame at one end, a bearing arranged on the inner side of the swing ring, and a swing drive assembly connected to the movable end of the swing ring; the inner ring of the bearing is sleeved on the outer shaft and axially linked with it, the outer ring of the bearing is rotationally connected to the inner side of the swing ring and the pivot point is radially arranged along the outer shaft, and a plurality of balls are arranged between the inner ring and the outer ring of the bearing. In this solution, the swing drive assembly drives the swing ring to rotate relative to its hinged end, and during the swinging process, the swing ring drives the bearing connected inside it and the outer shaft connected thereto to move axially. Specifically, because the outer ring of the bearing is rotationally connected to the swing ring, and the inner ring of the bearing is sleeved on the outer shaft. Therefore, when the swing ring swings, the bearing and the outer shaft are linked in the axial direction, and during the axial movement, the balls between the inner ring and the outer ring roll.

[0032] In a specific implementation, the swing drive assembly includes a swing motor, a turntable connected to the output end of the swing motor, and a connecting rod connecting the turntable and the swing ring; one end of the connecting rod is rotatably connected to a non-axial point of the turntable, and the other end is rotatably connected to the movable end of the swing ring. In this solution, the swing motor drives the turntable to rotate. Since the connecting rod is not connected to the axis point of the turntable, the position of the two ends of the connecting rod will change when the turntable rotates, and then the movable end of the swing ring is driven by the connecting rod to achieve swinging.

[0033] In addition, a displacement sensor is arranged on the frame beside the swing motor, and at least two induction plates are connected to the turntable; the moving paths of the two induction plates pass through the transmitting end of the displacement sensor, which is used to trigger the displacement sensor and control the forward and reverse rotation stroke of the swing motor.

[0034] Preferably, the central control unit controls the speed of the gear hobbing drive motor and / or controls the speed of the rotation drive mechanism driving the crystal fixture needle to adjust the number of tooth grooves processed on the crystal fixture needle. Before processing, the number of needle teeth to be processed can be set on the central console, and the PCL control unit controls the speed of the gear hobbing drive motor and / or the clamping rotating device to adapt the speed of the gear hobbing cutter and the crystal fixture needle to complete the above-set processing requirements.

[0035] Preferably, a heat dissipation fan is connected above the gear hobbing drive motor, and the heat dissipation fan can cool the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 The present invention is a schematic diagram of the gear hobbing machine structure.

[0037] Figure 2 This is a schematic diagram of the gear hobbing machine structure with the cover removed.

[0038] Figure 3 Schematic diagram of the structure of the clamping rotating device Figure 1 .

[0039] Figure 4 Schematic diagram of the structure of the clamping rotating device Figure 2 .

[0040] Figure 5 Schematic diagram of the structure of the clamping rotating device Figure 3 .

[0041] Figure 6 Schematic diagram of the connection between the drive shaft assembly and the swing ring thereon.

[0042] Figure 7 This is a top plan view of the clamp-mounted swivel.

[0043] Figure 8 Schematic diagram of the feeding mechanism and loading mechanism Figure 1 .

[0044] Fig. 9 Schematic diagram of the feeding mechanism and loading mechanism Figure 2 .

[0045] Fig.10 It is a structural schematic diagram of the feeding push head.

[0046] Fig.11 Installation diagram of gear hobbing mechanism Figure 1 .

[0047] Fig.12 Installation diagram of gear hobbing mechanism Figure 2 .

[0048] Fig.13 Installation diagram of gear hobbing mechanism Figure 3 . DETAILED DESCRIPTION

[0049] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0050] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0051] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more, unless otherwise clearly specified.

[0052] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0054] like Figure 1 and 2 As shown, this embodiment relates to a gear hobbing machine for processing crystal fixture needles, including a frame 1, and a feeding mechanism 2, a loading mechanism 3, a clamping and rotating device 4, and a gear hobbing mechanism 5 arranged on the frame 1. The feeding mechanism 2 in the gear hobbing machine is used to feed the crystal fixture needle, the loading mechanism 3 is used to feed the crystal fixture needle into the clamping and rotating device 4, the clamping and rotating device 4 is used to fix the crystal fixture needle and rotate it, and the gear hobbing mechanism 5 performs cutting and gear hobbing processing on the crystal fixture needle during high-speed rotation.

[0055] In such Figure 3-6In the scheme shown, the clamping and rotating device 4 includes a driving shaft assembly 41 rotatably arranged on the frame 1, and an axial hole 40 penetrating through the two axial end surfaces of the driving shaft assembly 41 is arranged at the axis of the driving shaft assembly 41, and a clamping mechanism for clamping and fixing the crystal clamp needle in the axial hole 40 is connected to the driving shaft assembly 41; the end of the feeding mechanism 2 is located on the axial extension line a of the rear end of the driving shaft assembly 41, the loading mechanism 3 is used to push the crystal clamp needle fed by the feeding mechanism 2 into the axial hole 40 of the driving shaft assembly 41, and the processing end of the gear rolling mechanism 5 is located on the axial extension line a of the front end of the driving shaft assembly 41.

[0056] The clamping and rotating device 4 in the crystal clamp needle feeding structure includes a driving shaft assembly 41 and a clamping mechanism. The axis of the driving shaft assembly 41 is provided with an axial hole 40 for inserting the crystal clamp needle, and the clamping mechanism is used to fix the crystal clamp needle inside the axial hole 40. When in use, the feeding mechanism 2 first conveys the crystal clamp needle to the axis extension line a at the rear end of the driving shaft assembly 41, and then the feeding mechanism 3 is used to push the crystal clamp needle into the axial hole 40 of the driving shaft assembly 41 until the front end of the crystal clamp needle extends out of the other end of the axial hole 40 and is in the gear rolling processing position. At this time, the clamping mechanism fixes the crystal clamp needle in the axial hole 40, the driving shaft assembly 41 drives the crystal clamp needle to rotate, and the gear rolling mechanism 5 performs gear rolling processing on the crystal clamp needle. This structure uses the method of feeding along the axis to feed the crystal clamp needle into the driving shaft assembly 41. When the next crystal clamp needle is fed in after the previous crystal clamp needle is processed, the previous crystal clamp needle can be ejected from the axial hole 40 to achieve feeding. Thereby, the continuity of the crystal fixture needle feeding process can be ensured, the relatively complicated clamping structure and process can be omitted, and the processing efficiency can be improved.

[0057] In such Figure 5 In the specific scheme shown, the clamping mechanism includes a plurality of clamping petals 61 arranged on the drive shaft assembly 41 and arranged at intervals along the circumference of the shaft hole 40. The plurality of clamping petals 61 can be radially retracted or separated to clamp or release the crystal clamp needle in the shaft hole 40. The drive shaft assembly 41 includes a central shaft 42 and an outer shaft rod 43 sleeved on the outer side of the central shaft 42. The shaft hole 40 is arranged on the central shaft 42, and the outer shaft rod 43 is axially movable with the central shaft 42. The clamping mechanism also includes a swing mechanism 7 for driving the outer shaft rod 43 to move axially. The plurality of clamping petals 61 are installed in the outer shaft rod 43 and cooperate with the wedge-shaped inclined surface of the outer shaft rod 43. When the outer shaft rod 43 moves axially relative to the central shaft 42, the plurality of clamping petals 61 are driven to be radially retracted or separated.

[0058] The axis of the driving shaft assembly 41 in the clamping and rotating device 4 is provided with an axial hole 40, and the axial hole 40 is used to pass the crystal clamp needle, and the clamping mechanism is used to fix the crystal clamp needle inside the axial hole 40, so that the driving shaft assembly 41 drives the crystal clamp needle to rotate together when rotating. In a specific scheme, the driving shaft assembly 41 includes a central shaft 42 and an outer shaft rod 43. When the swing mechanism 7 drives the outer shaft rod 43 to move axially relative to the central shaft 42, the multiple clamping petals 61 cooperate with the wedge-shaped inclined surface of the outer shaft rod 43, thereby driving the multiple clamping petals 61 to radially close or separate, thereby achieving the clamping and loosening of the crystal clamp needle. With the above structure, the outer shaft rod 43 sleeved on the central shaft 42 can move axially to achieve the clamping and fixing of the crystal clamp needle, thereby well compatibility of workpiece clamping and rotation drive, simplified structure, and stable operation.

[0059] In a specific implementation scheme, the outer shaft 43 is circumferentially linked with the central shaft 42, and the driving mechanism drives and connects the outer shaft 43. The driving mechanism includes a pulley 78 sleeved on the outer shaft 43, and a driving motor 70 driving the pulley 78 through a belt 79. In this scheme, the outer shaft 43 is circumferentially linked with the central shaft 42, and the driving motor drives the pulley 78 and the outer shaft 43 connected to it to rotate through the belt 79, thereby driving the central shaft 42 and the crystal fixture needle inside the shaft hole 40 to rotate. In the above scheme, the outer shaft 43 can move axially relative to the central shaft 42 but is circumferentially linked. Specifically, the following scheme can be adopted: radially arranged and matched ribs and grooves are respectively constructed on the inner wall of the outer shaft 43 and the outer wall of the central shaft 42, and the ribs and grooves are extended in the axial direction, so that the circumferential linkage is achieved based on the cooperation of the ribs and grooves. The ribs can move in the grooves to achieve axial movement.

[0060] In such Figure 3 and 4 In the further scheme shown, the swing mechanism 7 includes a swing ring 71 arranged around the outer shaft 43 and hinged on the frame 1 at one end, a bearing 72 arranged on the inner side of the swing ring 71, and a swing drive assembly connected to the movable end of the swing ring 71. The inner ring 721 of the bearing 72 is sleeved on the outer shaft 43 and axially linked with it, the outer ring 722 of the bearing 72 is rotatably connected to the inner side of the swing ring 71 and the rotation axis point is arranged along the radial direction of the outer shaft 43, and a plurality of balls 723 are arranged between the inner ring 721 and the outer ring 722 of the bearing 72. In this scheme, the swing drive assembly drives the swing ring 71 to rotate relative to its hinged end, and the swing ring 71 drives the bearing 72 connected inside it and the outer shaft 43 connected thereto to move axially during the swinging process. Specifically, because the outer ring 722 of the bearing 72 is rotatably connected to the swing ring 71, the inner ring 721 of the bearing 72 is sleeved on the outer shaft 43. Therefore, when the swing ring 71 swings, the bearing 72 and the outer shaft rod 43 move in axial direction, and during the axial movement, the balls 723 between the inner ring 721 and the outer ring 722 roll.

[0061] In a specific implementation, the swing drive assembly includes a swing motor 73, a turntable 74 connected to the output end of the swing motor 73, and a connecting rod 75 connecting the turntable 74 and the swing ring 71. One end of the connecting rod 75 is rotatably connected to a non-axial point of the turntable 74, and the other end is rotatably connected to the movable end of the swing ring 71. In this solution, the swing motor 73 drives the turntable 74 to rotate. Since the connecting rod 75 is not connected to the axis point of the turntable 74, the rotation of the turntable 74 will drive the positions of the two ends of the connecting rod 75 to change, and then drive the movable end of the swing ring 71 through the connecting rod 75 to achieve swinging.

[0062] In addition, a displacement sensor 76 is provided on the frame 1 beside the swing motor 73, and at least two induction plates 77 are connected to the turntable 74. The moving paths of the two induction plates 77 pass through the transmitting end of the displacement sensor 76, which is used to trigger the displacement sensor 76 and control the forward and reverse travel of the swing motor 73.

[0063] like Figure 8 and 9 As shown, the feeding mechanism 2 includes two material brackets 21 arranged opposite to each other, and a receiving groove 22 arranged on the axis extension line a of the rear end of the driving shaft assembly 41. A material trough 23 for storing crystal clamp needles is formed between the two material brackets 21, and a feeding channel for guiding the crystal clamp needles into the material trough 23 is constructed on the two material brackets 21. When loading, the crystal clamp needles need to be manually placed inside the material trough 23, and at least two ends of the crystal clamp needles are supported by the two material brackets 21. Under the guidance of the feeding channel, the crystal clamp needles can fall into the receiving groove 22, and then be located on the axis extension line a of the rear end of the driving shaft assembly 41. The feeding channel is connected to the lower end of the material trough 23, and the lower end surface of the material trough 23 of the material bracket 21 is constructed as an inclined surface facing the feeding channel. In this scheme, the inclined surface at the lower end of the material trough 23 can make the crystal clamp needles roll down and gather into the feeding channel.

[0064] In a further solution, the frame 1 is further provided with a dredging assembly, which includes a support rod 24 and a support driving assembly that drives the support rod 24 to move up and down longitudinally. The support rod 24 is located below the material trough 23 between the two material brackets 21. This solution provides a dredging assembly, and a support rod 24 is provided below the material trough 23. The support driving assembly intermittently lifts the support rod 24 so that the support rod 24 extends into the material trough 23, thereby avoiding the situation where multiple crystal clamp needles are stuck and cannot be fed in. In a specific implementation scheme, the support driving assembly includes a support driving motor 25, and a cam 26 connected to the output shaft of the support driving motor 25. The support rod 24 is slidably arranged on the frame 1, and a roller 27 that rolls against the surface of the cam 26 is provided at the lower end of the support rod 24. In this solution, the support driving motor 25 drives the cam 26 to rotate, and the roller 27 at the lower end of the support rod 24 moves in contact with the surface of the cam 26, rising and falling with the operation of the cam 26, thereby intermittently lifting the support rod 24.

[0065] like Figure 8-10 As shown, the feeding mechanism 3 includes a feeding push rod 31 arranged along the axial extension direction of the driving shaft assembly 41, and a feeding drive assembly driving the feeding push rod 31 to move back and forth. The feeding drive assembly is a servo feeding pair 32, and a feeding push head 33 is arranged on the moving part of the servo feeding pair 32, and the feeding push rod 31 is arranged on the feeding push head 33. The feeding push head 33 includes a cylinder 331, a spring 332 arranged inside the cylinder 331, and a connector 333 movably arranged in the cylinder 331 and elastically supported. The feeding push rod 31 is plugged into the connector 333. In this scheme, the connector 333 in the feeding push head 33 is used to plug the feeding push rod 31, and the inner end of the connector 333 is elastically supported. When the front end of the feeding push rod 31 encounters resistance, the connector 333 retreats relative to the cylinder 331, and the spring 332 is compressed. The solution of elastically pushing the crystal clamp needle can avoid damage caused by the loading push rod 31 being forcibly pushed in when the limit baffle blocks the movement of the crystal clamp needle.

[0066] like Figure 11-13As shown, a movable bracket is arranged on the frame 1, and a gear hobbing mechanism 5 is arranged on the movable bracket. The gear hobbing mechanism 5 includes a gear hobbing drive motor 51, and a gear hobbing cutter 52 connected to the output end of the gear hobbing drive motor 51; a heat dissipation fan 53 is also connected above the gear hobbing drive motor 51, and the heat dissipation fan 53 can cool the motor. The movable bracket includes a horizontal moving table 81, a longitudinal moving table 82, a transverse driving motor 83 driving the horizontal moving table 81 to move, and a longitudinal driving motor 84 driving the longitudinal moving table 82 to move. The transverse driving motor 83 drives the gear hobbing cutter 52 in the gear hobbing mechanism 5 to move in the radial direction relative to the crystal fixture needle, so as to adjust the cutting depth of the gear hobbing cutter 52 on the crystal fixture needle. The longitudinal driving motor 84 drives the gear hobbing cutter 52 in the gear hobbing mechanism 5 to move in the radial direction relative to the crystal fixture needle, so as to adjust the axial processing position of the gear hobbing cutter 52. In this solution, the gear hobbing mechanism 5 arranged on the mobile bracket can move in the lateral and longitudinal directions to realize the advance and retreat of the gear hobbing cutter 52, so as to realize the cutting of the needle teeth on the crystal fixture needle. Further, in this solution, during the cutting process, the PCL controller can further control the lateral drive motor 83 and the longitudinal drive motor 84. Based on the detection judgment or the system preset, the lateral drive motor 83 drives the gear hobbing cutter 52 to move in the radial direction relative to the crystal fixture needle. In this way, when the gear hobbing cutter 52 is worn after a certain number of turns, the lateral drive motor 83 can control the feed amount of the gear hobbing cutter 52, and adjust it in real time to overcome the problem of insufficient cutting groove depth on the workpiece caused by the wear of the gear hobbing cutter 52, so that the gear hobbing cutter 52 can be fully utilized, the utilization efficiency can be improved, and the cost can be reduced. Further, when the cutting teeth at the same axial position of the gear hobbing cutter 52 cannot be used anymore due to wear, the longitudinal drive motor 84 drives the gear hobbing cutter 52 to move axially, and then adjusts the processing position of the gear hobbing cutter 52, so that there is no need for manual adjustment, which is more convenient to use.

[0067] In a further solution, the horizontal moving platform 81 is arranged on the frame 1 for transverse movement, a connecting seat 85 is arranged on the horizontal moving platform 81, the longitudinal moving platform 82 is arranged on the connecting seat 85 for longitudinal movement, and the gear hobbing mechanism 5 is arranged on the longitudinal moving platform 82. The output end of the transverse driving motor 83 is connected to the horizontal moving platform 81 to drive the horizontal moving platform 81 to move transversely on the frame 1. The output end of the longitudinal driving motor 84 is connected to the longitudinal moving platform 82 to drive the longitudinal moving platform 82 to move longitudinally on the frame 1. In a specific implementation scheme, the transverse driving motor 83 is connected to the horizontal moving platform 81 by a screw assembly, and the longitudinal driving motor 84 is connected to the longitudinal moving platform 82 by a screw assembly. The driving method of the screw assembly is a prior art and is not described here.

[0068] like Fig.11As shown, the gear hobbing mechanism 5 is limitedly rotated and arranged on the longitudinal moving platform 82, and the gear hobbing mechanism 5 can rotate circumferentially relative to the longitudinal moving platform 82 along its rotating shaft to adjust the angle between the axis of the gear hobbing cutter 52 and the axis of the crystal fixture needle. In this scheme, the gear hobbing mechanism 5 can be rotated to adjust the above-mentioned angle, so that the angle of the needle groove constructed on the surface of the crystal fixture needle changes, meeting the subsequent crystal angular surface adjustment requirements. In a specific scheme, the longitudinal moving platform 82 is connected to a mounting seat 86 through a rotating shaft, and the gear hobbing mechanism 5 is arranged on the mounting seat 86. An arc hole 821 centered on the axis of the rotating shaft is constructed on the longitudinal moving platform 82, and a locking assembly 87 penetrating the arc hole 821 is connected to the mounting seat 86. When the locking assembly 87 is released, the gear hobbing mechanism 5 can rotate along the rotating shaft. After rotating to a suitable position, the locking assembly 87 can be fixed to fix the processing angle. Further, the angle can be marked along the edge of the arc hole 821, so as to facilitate the control of the angle during the adjustment process.

[0069] In the above scheme, a limit baffle 10 is provided on the movable bracket, specifically, the limit baffle 10 is provided on the longitudinal movable platform 82. The limit baffle 10 can move with the movable bracket to the axis extension line a at the front end of the driving shaft assembly 41, and is used to limit the extension position of the crystal clamp needle. In this scheme, the limit baffle 10 can control the extension amount of the crystal clamp needle relative to the shaft hole 40, thereby ensuring that the gear hobbing mechanism 5 processes the crystal clamp needle correctly.

[0070] To sum up, the specific execution steps of the gear hobbing machine are as follows:

[0071] 1. The crystal fixture needle is manually placed inside the material slot 23. Under the guidance of the feed channel, the crystal fixture needle can fall into the receiving slot 22 and be located on the axis extension line a at the rear end of the drive shaft assembly 41.

[0072] 2. The movable bracket moves so that the limit baffle 10 is on the axial extension line a of the front end of the driving shaft assembly 41, and the loading mechanism 3 pushes the crystal clamp needle into the shaft hole 40 of the driving shaft assembly 41 until the front end of the crystal clamp needle extends out of the shaft hole 40 and abuts against the limit baffle 10.

[0073] 3. The swing drive assembly in the swing mechanism 7 drives the swing ring 71 to rotate relative to its hinged end. During the swinging process, the swing ring 71 drives the bearing 72 connected inside it and the outer shaft 43 connected thereto to move axially. When the outer shaft 43 moves axially relative to the central axis 42, it drives the multiple clamping petals 61 to contract radially to fix the crystal fixture needle.

[0074] 4. The drive motor drives the pulley 78 and its connected drive shaft assembly 41, as well as the internal crystal fixture needle to rotate through the belt 79.

[0075] 5. The movable bracket drives the gear hobbing mechanism 5 to move, and the gear hobbing cutter 52 in the gear hobbing mechanism 5 cuts the crystal fixture needle to obtain needle teeth.

[0076] 6. After the crystal fixture needle is processed, the crystal fixture needle is released; when the feeding mechanism 3 feeds in the next crystal fixture needle, the previous crystal fixture needle is pushed out from the shaft hole 40 to realize unloading.

[0077] In the above scheme, based on detection judgment or system preset, the feed amount of the gear hobbing cutter 52 can be controlled by the transverse drive motor 83, and the problem of insufficient cutting groove depth on the workpiece caused by wear of the gear hobbing cutter 52 can be overcome by real-time adjustment. The gear hobbing cutter 52 is driven to move axially by the longitudinal drive motor 84, thereby adjusting the processing position of the gear hobbing cutter 52.

[0078] In addition, the central control unit controls the speed of the gear hobbing drive motor 51, and / or controls the speed of the rotation drive mechanism driving the crystal fixture needle to adjust the number of tooth grooves processed on the crystal fixture needle. Before processing, the number of needle teeth to be processed can be set on the central console, and the PCL control unit controls the speed of the gear hobbing drive motor 51 and / or the clamping rotating device 4 to adapt the speed of the gear hobbing cutter 52 and the crystal fixture needle to complete the above-set processing requirements.

[0079] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0080] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and intent of the present invention.

Claims

1. A gear hobbing machine tool for processing crystal fixture needles, comprising a frame (1), and a feeding mechanism (2), a loading mechanism (3), a clamping rotating device (4) and a gear hobbing mechanism (5) arranged on the frame (1); characterized in that: The clamping and rotating device (4) comprises a driving shaft assembly (41) rotatably arranged on the frame (1); an axial hole (40) penetrating through both axial end surfaces of the driving shaft assembly (41) is arranged at the axis of the driving shaft assembly (41); and a clamping mechanism for clamping and fixing a crystal fixture needle in the axial hole (40) is connected to the driving shaft assembly (41); the end of the feeding mechanism (2) is located on an axial extension line a at the rear end of the driving shaft assembly (41); the loading mechanism (3) is used to push the crystal fixture needle fed by the feeding mechanism (2) into the axial hole (40) of the driving shaft assembly (41); and the processing end of the gear hobbing mechanism (5) is located on an axial extension line a at the front end of the driving shaft assembly (41); The frame (1) is provided with a movable bracket, and a gear hobbing mechanism (5) is provided on the movable bracket, the gear hobbing mechanism (5) comprises a gear hobbing drive motor (51), and a gear hobbing cutter (52) connected to the output end of the gear hobbing drive motor (51); the movable bracket comprises a horizontal moving platform (81), a longitudinal moving platform (82), a transverse driving motor (83) for driving the horizontal moving platform (81) to move, and a longitudinal driving motor (84) for driving the longitudinal moving platform (82) to move; the transverse driving motor (83) drives the gear hobbing cutter (52) in the gear hobbing mechanism (5) to move in a radial direction relative to the crystal fixture needle, so as to adjust the cutting depth of the gear hobbing cutter (52) on the crystal fixture needle; the longitudinal driving motor (84) drives the gear hobbing cutter (52) in the gear hobbing mechanism (5) to move in a radial direction relative to the crystal fixture needle, so as to adjust the axial processing position of the gear hobbing cutter (52); The feeding mechanism (2) comprises two material brackets (21) arranged opposite to each other, and a receiving groove (22) arranged on an axis extension line a at the rear end of the driving shaft assembly (41); a material trough (23) for storing crystal clamp needles is formed between the two material brackets (21), and a feeding channel for guiding the crystal clamp needles into the material trough (23) is formed on the two material brackets (21); the feeding channel is connected to the lower end of the material trough (23), and the lower end surface of the material trough (23) of the material bracket (21) is constructed as an inclined surface facing the feeding channel; The frame (1) is also provided with a dredging assembly, which includes a support rod (24) and a support driving assembly for driving the support rod (24) to move up and down longitudinally; the support rod (24) is located below the material trough (23) between the two material brackets (21); the support driving assembly includes a support driving motor (25) and a cam (26) connected to the output shaft of the support driving motor (25); the support rod (24) is slidably arranged on the frame (1), and a roller (27) is arranged at the lower end of the support rod (24) and rolls against the surface of the cam (26); The feeding mechanism (3) comprises a feeding push rod (31) arranged along the axial extension direction of the driving shaft assembly (41), and a feeding drive assembly driving the feeding push rod (31) to move back and forth; the feeding drive assembly is a servo feeding pair (32), a feeding push head (33) is arranged on the moving part of the servo feeding pair (32), and the feeding push rod (31) is arranged on the feeding push head (33); the feeding push head (33) comprises a cylinder (331), a spring (332) arranged inside the cylinder (331), and a connecting head (333) movably arranged in the cylinder (331) and elastically supported; the feeding push rod (31) is plugged into the connecting head (333); The clamping mechanism comprises a plurality of clamping petals (61) arranged on the driving shaft assembly (41) and arranged at intervals along the circumference of the shaft hole (40), and the plurality of clamping petals (61) can be radially retracted or separated to clamp or release the crystal clamp needle in the shaft hole (40); the driving shaft assembly (41) comprises a central shaft (42) and an outer shaft rod (43) sleeved on the outer side of the central shaft (42); the shaft hole (40) is arranged on the central shaft (42), the outer shaft rod (43) is axially movable with the central shaft (42), and the clamping mechanism also comprises a driving outer shaft rod (43) A swing mechanism (7) capable of axial movement; a plurality of clamping petals (61) are installed in an outer shaft (43) and cooperate with a wedge-shaped inclined surface of the outer shaft (43); when the outer shaft (43) moves axially relative to the central shaft (42), the plurality of clamping petals (61) are driven to be radially retracted or separated; the outer shaft (43) and the central shaft (42) are circumferentially linked, and a driving mechanism is connected to the outer shaft (43); the driving mechanism comprises a pulley (78) sleeved on the outer shaft (43), and a driving motor (70) driving the pulley (78) via a belt (79); The swing mechanism (7) comprises a swing ring (71) arranged around an outer shaft (43) and hinged at one end to a frame (1), a bearing (72) arranged on the inner side of the swing ring (71), and a swing drive assembly connected to the movable end of the swing ring (71); an inner ring (721) of the bearing (72) is sleeved on the outer shaft (43) and axially linked thereto, an outer ring (722) of the bearing (72) is rotatably connected to the inner side of the swing ring (71), and a plurality of balls (723) are arranged between the inner ring (721) and the outer ring (722) of the bearing (72); the swing drive assembly comprises a swing motor (73), a rotating disk (74) connected to the output end of the swing motor (73), and a connecting rod (75) connecting the rotating disk (74) and the swing ring (71); one end of the connecting rod (75) is rotatably connected to a non-axial point of the rotating disk (74), and the other end is rotatably connected to the movable end of the swing ring (71).

2. A gear hobbing machine for processing crystal fixture needles according to claim 1, characterized in that: The movable bracket is provided with a limit baffle (10), which can move with the movable bracket to an axis extension line a at the front end of the drive shaft assembly (41) to limit the extension position of the crystal clamp needle.

3. The gear hobbing machine tool for processing crystal fixture needles according to claim 1, characterized in that: The horizontal movable table (81) is arranged on the frame (1) for transverse movement, a connecting seat (85) is arranged on the horizontal movable table (81), the longitudinal movable table (82) is arranged on the connecting seat (85) for longitudinal movement, and the gear hobbing mechanism (5) is arranged on the longitudinal movable table (82); the gear hobbing mechanism (5) is arranged on the longitudinal movable table (82) for limited rotation, and the gear hobbing mechanism (5) can rotate circumferentially along its rotation axis relative to the longitudinal movable table (82) to adjust the angle between the axis of the gear hobbing cutter (52) and the axis of the crystal fixture needle.

4. The gear hobbing machine tool for processing crystal fixture needles according to claim 3, characterized in that: The longitudinal movable platform (82) is connected to a mounting seat (86) via a rotating shaft, and the gear hobbing mechanism (5) is arranged on the mounting seat (86); an arc-shaped hole (821) centered on the axis of the rotating shaft is constructed on the longitudinal movable platform (82), and a locking assembly (87) penetrating the arc-shaped hole (821) is connected to the mounting seat (86).

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