A tool adjustment control mechanism for a CNC gear hobbing machine tool

Abstract

The present invention discloses a tool adjustment control mechanism of a CNC gear hobbing machine tool in the technical field of machine tool auxiliary equipment, comprising a driving shaft and a driven shaft; an outer cylinder is arranged on the outer side of the driving shaft and the driven shaft; an elastic telescopic component is arranged on the outer cylinder; the elastic telescopic component comprises a fixed plate, a first slide plate, a second slide plate and a conical expansion sleeve; a first pressure sensor is arranged between the fixed plate and the first slide plate; a first spring is arranged on the side of the first slide plate away from the fixed plate; a second pressure sensor is arranged on the inner wall of the conical expansion sleeve; a preliminary fastening component and a secondary fastening component are arranged on the conical expansion sleeve; a limit position component is also arranged on the driving shaft; a moving component is arranged on the driving part and the driven part; and a control module is also included; the control module is used to control the operation of the preliminary fastening component based on the information of the first pressure sensor and the second pressure sensor. This scheme can adapt to a variety of machine tools and tools, and realizes the rapid centering alignment of the tool.

Description

Technical Field

[0001] The invention belongs to the technical field of machine tool auxiliary equipment, in particular to a tool adjustment control mechanism of a numerically controlled gear hobbing machine tool. Background Art

[0002] As an important equipment in modern manufacturing, CNC gear hobbing machine tools are widely used in the processing of precision parts such as gears and turbines. During the processing of CNC gear hobbing machine tools, the tool needs to be replaced due to tool wear or changes in processing requirements. However, the tool replacement process is not as simple as removing the old tool and installing the new tool. The installation quality has an important impact on the subsequent processing process.

[0003] In the prior art, when replacing a tool, the method is mainly to remove one end of the tool shaft, then remove the tool from the tool shaft, then put the new tool along the tool shaft, finally fix one end of the tool shaft, and then tighten the tool. When the new tool is not installed in place or is not fixed firmly, the tool may produce radial or axial runout during the processing. This runout will seriously affect the processing accuracy, cause inaccurate gear tooth shape, and even damage the workpiece. Therefore, the tool needs to be adjusted after installation to ensure the installation quality of the new tool. Most of the tool adjustment control mechanisms in the prior art rely on manual adjustment, which requires the operator to spend a lot of time and energy for precise measurement and adjustment. This process is not only time-consuming and labor-intensive, but also prone to errors due to human factors.

[0004] Therefore, there is an urgent need for a tool adjustment mechanism that can improve adjustment efficiency and accuracy to ensure that the tool can remain stable during the machining process. Summary of the invention

[0005] In order to solve the above problems, the purpose of the present invention is to provide a tool adjustment control mechanism for a CNC gear hobbing machine tool, which can quickly and conveniently complete tool replacement and adjustment and improve tool installation efficiency.

[0006] In order to achieve the above object, the technical solution of the present invention is as follows:

[0007] A tool adjustment control mechanism for a CNC gear hobbing machine comprises: a workbench; a driving part, a driven part, a driving shaft and a driven shaft are arranged on the workbench; the driving part is used to drive the driving shaft to rotate; the driving shaft and the driven shaft are detachably connected; the driven shaft is rotatably connected to the driven part; the driven part is used to push the driven shaft to dock with the driving shaft; an outer cylinder is arranged on the outer side of the driving shaft and the driven shaft; the driving shaft and the driven shaft are respectively rotatably matched with the outer cylinder; an elastic telescopic component is arranged on the outer cylinder; the elastic telescopic component comprises a fixed plate, a first slide plate, a second slide plate and a conical expansion sleeve; the fixed plate, the first slide plate and the second slide plate are all slidably matched with the outer cylinder; the fixed plate is in close contact with the first slide plate, and a first pressure sensor is arranged between the fixed plate and the first slide plate; a first slide plate is arranged on the side of the first slide plate away from the fixed plate A spring; one end of the first spring away from the first slide is fixedly connected to the second slide; the second slide is rotatably matched with the conical expansion sleeve on the side away from the first spring; a second pressure sensor is arranged on the inner wall of the conical expansion sleeve; a preliminary fastening component for preliminarily fastening the conical expansion sleeve to the driving shaft or the driven shaft and a secondary fastening component for locking the conical expansion sleeve to the driving shaft or the driven shaft are arranged on the conical expansion sleeve; a limiting component for limiting the sliding of the second slide is also arranged on the driving shaft; a moving component for driving the fixed plate to slide synchronously is arranged on the driving part and the driven part; and a control module is also included; the control module is used to judge the installation status of the tool based on the information of the first pressure sensor and the second pressure sensor, and control the operation of the preliminary fastening component.

[0008] The above scheme has the following beneficial effects:

[0009] 1. In this scheme, after the driving shaft and the driven shaft are separated, the tool is put on the driving shaft, and the tool is slid along the driving shaft and the outer cylinder to one side of the fixed plate, the tool is limited and fixed on the outer cylinder by the limit assembly, and then the driven shaft is re-connected with the driving shaft, and the limit assembly is released at the same time, and the driving shaft is driven to rotate at a low speed. Under the extrusion force of the first spring, the tool, the conical expansion sleeve and the second slide plate slide along the outer cylinder to the center position (i.e., the center position) on the driving shaft and the driven shaft. When the tool and the conical expansion sleeve slide from the outer cylinder onto the driving shaft and / or the driven shaft, the driving shaft and / or the driven shaft will drive the tool and the conical expansion sleeve to rotate at a low speed, and at the same time start the moving assembly to move the fixed plates on both sides to the center position.

[0010] The control module obtains the information of the first pressure sensor and the second pressure sensor in real time, and determines whether the installation position of the tool is accurate in real time. After determining the installation position of the tool, the control module controls the operation of the preliminary fastening component to initially fix the conical expansion sleeve on the driving shaft and the driven shaft, thereby limiting the sliding of the tool. Then, the conical expansion sleeve is further firmly fixed by manually using the secondary fastening component.

[0011] Compared with the prior art, this solution uses the first pressure sensor to monitor in real time whether there is axial runout during the tool rotation process, and uses the second pressure sensor to monitor in real time whether there is radial runout during the tool rotation process, thereby determining whether the tool is installed accurately. By monitoring these parameters in real time, the control module can accurately determine whether the tool installation position is accurate, thereby avoiding machining errors caused by improper installation and improving machining accuracy.

[0012] 2. This solution can quickly replace and adjust the tool through the designed tool adjustment control mechanism. The detachable design of the driving shaft and the driven shaft, and the way the tool slides along the driving shaft and is fixed by the conical expansion sleeve, simplify the tool installation process, reduce installation time, and thus improve production efficiency.

[0013] 3. The tool adjustment control mechanism designed in this scheme is not only suitable for CNC gear hobbing machines, but can also be appropriately adjusted as needed to adapt to other types of machine tools and tools, which helps to quickly center the tool, thereby improving the versatility and practicality of the scheme.

[0014] Furthermore, the preliminary fastening assembly includes an electromagnet; the electromagnet is electrically connected to the control module; and the driving shaft and the driven shaft are made of magnetic materials.

[0015] Beneficial effect: The electromagnet can quickly generate magnetic force under the command of the control module to initially lock the tapered expansion sleeve to the active shaft or the driven shaft. This fast response feature allows the tool to be quickly initially fixed during installation, avoiding installation errors caused by tool shaking or misalignment.

[0016] Furthermore, the secondary fastening assembly comprises a fastening nut; an external thread is arranged on the outer side of the conical expansion sleeve; and the fastening nut is threadably matched with the external thread.

[0017] Beneficial effect: After the position of the tool is determined, the fastening nut is tightened. As the fastening nut continues to move along the external thread, the fastening nut will continuously squeeze the conical expansion sleeve. Through the locking action of the fastening nut, the conical expansion sleeve is firmly fixed on the driving shaft or the driven shaft, thereby avoiding the risk of the tool falling off or flying out during processing.

[0018] Furthermore, a mortise and tenon groove is provided in the driving shaft; a protrusion is provided on the driven shaft; and the protrusion is connected to the mortise and tenon groove by mortise and tenon joints.

[0019] Beneficial effect: The driving shaft and the driven shaft are detachably connected by means of mortise and tenon joints, which can ensure that the two remain tightly connected during high-speed rotation, thus avoiding processing errors or safety hazards caused by loose connections.

[0020] Furthermore, the limit assembly includes a limit block, a cylinder and a neck support plate; a limit groove is provided on the active shaft, and the limit groove is connected with the tenon groove; the limit block, the cylinder and the neck support plate are all slidably matched with the limit groove; the neck support plate is fixedly connected to the outer side of the cylinder; a tension spring is provided in the limit groove; the two ends of the tension spring are respectively fixedly connected to the bottom of the neck support plate and the side wall of the limit groove; a telescopic groove is provided in the cylinder; a second spring is provided at the bottom of the telescopic groove; the top of the second spring is fixedly connected to the bottom of the limit block; the limit block is slidably matched with the telescopic groove; a spring groove is also provided on one side of the bottom of the limit groove; the spring groove is respectively connected with the tenon groove and the limit groove; a reset spring, an insert block and a stop block are provided in the spring groove; the insert block is slidably matched with the spring groove; the top of the stop block is fixedly connected to one side of the insert block; the bottom of the stop block extends into the tenon groove.

[0021] Beneficial effect: As the protrusion of the driven shaft is continuously inserted into the tenon groove until the protrusion contacts the block, the protrusion pushes the block into the spring groove, and then brings the insert block into the spring groove. At this time, under the action of the tension spring, the limit block, the neck support plate and the cylinder are pulled into the limit groove, so that the limit block will not interfere with the sliding of the tool, the second slide plate and the conical expansion sleeve.

[0022] When the protrusion is moved out of the tenon groove, the insert block is pushed out of the spring groove under the action of the reset spring, inserted into the limit groove (bottom of the cylinder) and pushes the cylinder upward, so that the limit block emerges from the limit groove again, thereby limiting the rebound of the second slide plate, the conical expansion sleeve and the tool under the action of the first spring.

[0023] When the tool to be replaced needs to be restricted on the outer cylinder, the tool is pushed toward the fixed plate until the tool passes over the limit block, and the limit block is pushed into the telescopic groove of the cylinder until the tool completely passes through the limit block, at which point the limit block is reset under the action of the second spring.

[0024] Furthermore, the moving component includes a stepper motor and a lead screw; the output shaft of the stepper motor is axially fixedly connected to the lead screw; the lead screw passes through the fixed plate, and the lead screw and the fixed plate are threadedly matched; the stepper motor is electrically connected to the control module.

[0025] Beneficial effect: The output shaft of the stepper motor drives the lead screw to rotate, and the lead screw rotates to move the fixed plate horizontally along the lead screw. The combined design of the stepper motor and the lead screw has high flexibility. By adjusting the step angle, speed and pitch of the stepper motor and other parameters, the moving speed and displacement of the fixed plate and the tool can be flexibly adjusted.

[0026] Furthermore, a locking assembly is provided on the driven part; a slide groove is provided on the workbench; a bolt is provided on the driven part; the bolt passes through the driven part and extends into the slide groove; an expansion plug is provided at one end of the bolt close to the slide groove; the expansion plug is slidably matched with the slide groove; a fixing nut is threadedly matched at one end of the bolt away from the slide groove.

[0027] Beneficial effect: The design of the locking assembly enables the driven part to move flexibly in the slide slot. When the position of the driven part needs to be adjusted, it only needs to be pushed along the slide slot. When the driven part needs to be fixed, the locking function can be achieved by tightening the fixing nut, ensuring the stability of the driven part during the processing.

[0028] Furthermore, the driven shaft and the driving shaft are equal in length.

[0029] Beneficial effect: When the driven shaft and the driving shaft are of equal length, they maintain consistent mechanical properties during rotation. This means that the squeezing force of the first spring on the fixed block remains relatively stable, whether in the initial position or the final position. This stable force state helps the control module to more accurately determine the position and state of the tool.

[0030] Furthermore, anti-slip grooves are provided on the outer side of the fastening nut.

[0031] Beneficial effect: In an emergency situation where the tool needs to be quickly released or tightened, the anti-slip pattern design enables the operator to quickly and stably rotate the tightening nut, avoiding accidental injuries caused by improper operation and ensuring safety in the workplace.

[0032] Furthermore, the control module is used to determine whether the tool is centered based on the information collected by the first pressure sensor; if the pressures collected by the first pressure sensors on both sides are not equal, the control module determines that the tool is not centered; if the pressures collected by the first pressure sensors on both sides are equal, the control module determines that the tool is centered; based on the information collected by the second pressure sensor, determine whether the tool has radial movement; if the pressure collected by the second pressure sensor per unit time fluctuates, the control module determines that the tool has radial movement; if the pressure collected by the second pressure sensor per unit time is stable, the control module determines that the tool does not have radial movement.

[0033] Beneficial effects: Through the information collected by the first pressure sensor, the control module can accurately determine whether the tool is centered. Through the information collected by the second pressure sensor, the control module can accurately determine whether the tool has radial movement. This ensures that the tool reaches an accurate centered alignment and stable state during installation, thereby improving processing accuracy and product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of a tool adjustment control mechanism of a CNC gear hobbing machine tool of the present invention.

[0035] Figure 2 for Figure 1 Top view of the .

[0036] Figure 3 for Figure 2 Middle AA section view.

[0037] Figure 4 for Figure 3 A partial enlarged schematic diagram of point P in the middle.

[0038] Figure 5 for Figure 4 Schematic diagram of the internal structure of the middle cylinder.

[0039] Figure 6 A top view of a conical expansion sleeve.

[0040] Figure 7 It is a front view of the conical expansion sleeve.

[0041] Figure 8 for Figure 3 Middle BB cross-section.

[0042] Fig. 9 for Figure 4 A partial enlarged schematic diagram of point M in the middle.

[0043] The figure marks in the drawings of the specification include: 1, workbench; 2, driving part; 3, driven part; 4, driven shaft; 5, driving shaft; 101, slide groove; 301, bolt; 302, fixing nut; 303, expansion plug; 304, stepping motor; 305, screw; 401, outer cylinder; 402, protrusion; 501, fixing plate; 502, first pressure sensor; 503, first slide plate; 504, first spring; 505, second slide plate; 506, conical expansion sleeve; 507, limit groove; 508, limit block; 509, cylinder; 510, tension spring; 511, spring groove; 512, insert block; 513, stop block; 5061, fastening nut; 5062, second pressure sensor; 5091, second spring; 5092, neck support plate. DETAILED DESCRIPTION

[0044] 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 only used to explain the present invention, and cannot be understood as limiting the present invention.

[0045] In the description of the present invention, it is to be understood that the terms “longitudinal”, “lateral”, “vertical”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside” and “outside” etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0046] In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal connection between two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0047] The following is further described in detail through specific implementation methods:

[0048] The embodiment is basically as shown in the attached Figure 1-Figure 9 As shown: a tool adjustment control mechanism of a CNC gear hobbing machine tool, mainly comprising a workbench 1; a driving part 2, a driven part 3, a driving shaft 5 and a driven shaft 4 are arranged on the workbench 1. The driving part 2 is used to drive the driving shaft 5 to rotate. Specifically, the driving part 2 is mainly composed of a frame, a driving motor and a gear set. The gear set is a transmission component connecting the driving motor and the driving shaft 5. It is composed of multiple gears and transmits power and torque through the meshing between the gears.

[0049] The driving shaft 5 is detachably connected to the driven shaft 4. Figure 3 As shown, a tenon groove is provided at the inner axis of the driving shaft 5; a protrusion 402 is provided on the driven shaft 4, and the protrusion 402 is integrated with the driven shaft 4; the protrusion 402 and the tenon groove are detachably connected in a mortise and tenon joint manner.

[0050] The driven shaft 4 is rotatably connected to the driven part 3; the driven part 3 is used to push the driven shaft 4 to dock with the driving shaft 5. Specifically, in this embodiment, the overall shape of the driven part 3 is block-shaped, as shown in the attached Figure 1 As shown, the driven part 3 is rotatably connected with the driven shaft 4 through a bearing, and when the driven part 3 moves, the driven shaft 4 can be driven to move. The outer sides of the driving shaft 5 and the driven shaft 4 are both slidably matched with an outer cylinder 401; and the outer cylinder 401 is provided with an elastic telescopic component.

[0051] Specifically, as attached Figure 3As shown, in this embodiment, the driven shaft 4 and the driving shaft 5 are of equal length, and the two sets of elastic components are symmetrically arranged with the center position of the driven shaft 4 and the driving shaft 5 as the reference line. The elastic telescopic component mainly includes a fixed plate 501, a first slide plate 503, a second slide plate 505 and a conical expansion sleeve 506; the fixed plate 501, the first slide plate 503 and the second slide plate 505 are all slidably matched with the outer cylinder 401; the fixed plate 501 is tightly attached to the first slide plate 503, and a first pressure sensor 502 is fixedly installed between the fixed plate 501 and the first slide plate 503 by screws, and the first pressure sensor 502 is mainly used to collect the pressure between the fixed plate 501 and the first slide plate 503. Specifically, as shown in the attached Figure 3 As shown, in this embodiment, two sets of fixed plates 501 are respectively located near the driven part 3 and the driving part 2, and the first slide plate 503 is bonded and fixed with a first spring 504 on the side away from the fixed plate 501; the first spring 504 is welded and fixedly connected to the second slide plate 505 at one end away from the first slide plate 503. The second slide plate 505 is rotatably matched with the conical expansion sleeve 506 on the side away from the first spring 504; combined with the attached Figure 6 and attached Figure 7 As shown, the structure of the conical expansion sleeve 506 in this embodiment is similar to that of a badminton, which is mainly composed of an annular base and four arc-shaped metal plates. The thickness of the arc-shaped metal plates gradually becomes thicker from one end close to the annular base. The arc-shaped metal plates are integrated with the annular base, and there are gaps between adjacent arc-shaped metal plates. The conical expansion sleeve 506 formed by them has an overall truncated cone shape, and the arc-shaped metal plates can be gradually tightened inward by squeezing them.

[0052] A second pressure sensor 5062 is welded and fixed on the inner wall of the conical expansion sleeve 506; the conical expansion sleeve 506 is provided with a preliminary fastening component for preliminarily fastening the conical expansion sleeve 506 to the driving shaft 5 or the driven shaft 4 and a secondary fastening component for locking the conical expansion sleeve 506 to the driving shaft 5 or the driven shaft 4.

[0053] Specifically, the preliminary tightening assembly includes an electromagnet, which is installed in the side wall of the conical expansion sleeve 506 in this embodiment; the electromagnet is electrically connected to the control module; the driving shaft 5 and the driven shaft 4 are made of magnetic materials. In this embodiment, the magnetic force generated by the magnet fixes the conical expansion sleeve 506 on the driving shaft 5 or the driven shaft 4 to prevent it from moving further.

[0054] Specifically, the secondary fastening assembly includes a fastening nut 5061. In this embodiment, the outer side of the fastening nut 5061 is engraved with anti-slip grooves. The outer side of the conical expansion sleeve 506 is provided with an external thread; the fastening nut 5061 is threadably matched with the external thread.

[0055] The driving shaft 5 is also provided with a limit assembly for limiting the sliding of the second slide plate 505. Figure 4 and attached Figure 5 As shown, the limiting assembly includes a limiting block 508, a cylinder 509 and a neck support plate 5092; a limiting groove 507 is provided on the driving shaft 5, and the bottom of the limiting groove 507 is connected to the tenon groove; the limiting block 508, the cylinder 509 and the neck support plate 5092 are all slidably matched with the limiting groove 507; in this embodiment, the neck support plate 5092 is in the shape of a ring, and the neck support plate 5092 is welded and fixed to the outer side of the cylinder 509; in this embodiment, the limiting groove 507 is in the shape of a "middle", that is, the middle part The limiting groove 507 (the wider part in the middle) is provided with a tension spring 510; the two ends of the tension spring 510 are respectively welded and fixed to the bottom of the neck support plate 5092 and the side wall of the limiting groove 507; a telescopic groove is provided in the cylinder 509; a second spring 5091 is adhesively fixed to the bottom of the telescopic groove; the top of the second spring 5091 is adhesively fixed to the bottom of the limiting block 508; the limiting block 508 is slidably matched with the telescopic groove; a spring groove 511 is also provided on one side of the bottom of the limiting groove 507; as shown in the attached Fig. 9 As shown, the spring groove 511 is in a "T" shape as a whole, and the spring groove 511 is connected with the tenon groove and the limit groove 507 respectively; a return spring, an insert block 512 and a stop block 513 are arranged in the spring groove 511; the insert block 512 and the stop block 513 are both slidably matched with the spring groove 511; the top of the stop block 513 is welded and fixed to the bottom of the insert block 512; the bottom of the stop block 513 extends into the tenon groove.

[0056] The driving part 2 and the driven part 3 are both provided with a moving component for driving the fixed plate 501 to slide synchronously. Figure 3 As shown, the moving component includes a stepper motor 304 and a lead screw 305; for the moving component in the driven part 3, the stepper motor 304 is installed in the driven part 3; for the moving component of the driving part 2, the stepper motor 304 is installed on the top of the workbench 1; the output shaft of the stepper motor 304 is axially welded and fixed to the lead screw 305; the lead screw 305 passes through the fixed plate 501, and the lead screw 305 is threadedly matched with the fixed plate 501. Specifically, after the fixed plate 501 is penetrated by the lead screw 305, a through groove will be generated on the fixed plate 501, and an internal thread is provided in the through groove, and the lead screw 305 is threadedly matched with the internal thread.

[0057] In order to facilitate the movement and fixation of the driven part 3, a locking assembly is also provided on the driven part 3; a slide groove 101 is provided on the workbench 1, as shown in the attached Figure 8As shown, the structure of the slide 101 near the opening (the opening is the position where the slide 101 is connected to the outside world) is conical (the area gradually decreases); a bolt 301 is provided on the driven part 3; the bottom of the bolt 301 passes through the driven part 3 and extends into the slide 101; an expansion plug 303 is welded and fixed to the bottom of the bolt 301. Specifically, the structure of the expansion plug 303 is similar to that of a badminton, consisting of a base and a plurality of fan-shaped blocks, which are welded and fixed to the base, and there are gaps between the fan-shaped blocks; the expansion plug 303 is slidably matched with the slide 101; a fixing nut 302 is threadedly matched at one end of the bolt 301 away from the slide 101.

[0058] It also includes a control module; the control module is used to determine the installation status of the tool based on the information of the first pressure sensor 502 and the second pressure sensor 5062, and control the operation of the preliminary fastening assembly.

[0059] Specifically, the control module is used to determine whether the tool is centered based on the information collected by the first pressure sensor 502; if the pressures collected by the first pressure sensors 502 on both sides are not equal, the control module determines that the tool is not centered; if the pressures collected by the first pressure sensors 502 on both sides are equal, the control module determines that the tool is centered; based on the information collected by the second pressure sensor 5062, determine whether the tool has radial movement (i.e., radial jump along the active shaft 5); if the pressure collected by the second pressure sensor 5062 per unit time fluctuates, the control module determines that the tool has radial movement; if the pressure collected by the second pressure sensor 5062 per unit time is stable, the control module determines that the tool does not have radial movement.

[0060] The specific implementation process is as follows:

[0061] The staff loosens the fixing nut 302 to allow the driven part 3 to slide along the slide groove 101, slides the driven part 3 to the left, separates the driven shaft 4 from the driving shaft 5, and then removes the old tool and puts the new tool on the driving shaft 5. The staff then pushes the tool to the right along the driving shaft 5 and the outer cylinder 401, so that the new tool, the conical expansion sleeve 506 and the second slide plate 505 move to the right (in this process, the limit block 508 will be pressed downward into the telescopic groove), until the new tool passes over the limit groove 507, and the limit block 508 is reset under the action of the second spring 5091, thereby limiting the movement of the new tool, the conical expansion sleeve 506 and the second slide plate 505, and at this time the first spring 504 on the right is in a compressed state.

[0062] Then move the driven part 3 to the right, so that the driven shaft 4 and the driving shaft 5 are docked, and then tighten the fixing nut 302 again. During the docking process, as the protrusion 402 is inserted into the tenon groove, until the protrusion 402 contacts the stopper 513, the stopper 513 is pushed into the spring groove 511, thereby driving the insert block 512 to move inward synchronously. At this time, under the action of the tension spring 510, the cylinder 509 and the limit block 508 will be pulled down into the limit groove 507. After the new tool loses the restraint of the limit block 508, it will move to the left under the action of the first spring 504 on the right. At the same time, start the stepper motor 304 and the driving part 2, the driving part 2 drives the driving shaft 5 to rotate at a low speed, and the stepper motor 304 rotates the lead screw 305 to make the fixed blocks on both sides (driving part 2 and driven part 3) move inward synchronously.

[0063] When the new tool moves from the outer cylinder 401 to the driving shaft 5 under the action of the first spring 504 on the right side, the driving shaft 5 will drive the new tool to rotate at a low speed. At the same time, driven by the stepper motor 304, the fixed plates 501 on both sides move toward the center position at the same speed until the new tool is moved to the center position (i.e., the junction of the driving shaft 5 and the driven shaft 4) and stabilized at the center position. At this time, the pressure collected by the first pressure sensor 502 will be equal. At the same time, since the second slide plate 505 continuously squeezes the conical expansion sleeve 506, the friction between the conical expansion sleeve 506 and the new tool will gradually increase. Therefore, the new tool will also drive the conical expansion sleeve 506 to rotate synchronously while rotating. In this process, if the new tool has radial movement, it will drive the conical expansion sleeve 506 to move radially (i.e. jump up and down) synchronously. At this time, the pressure collected by the second pressure sensor 5062 per unit time (the pressure between the active shaft 5 or the driven shaft 4 and the inner wall of the conical expansion sleeve 506) will be intermittent (i.e. fluctuate) until the new tool is fixed to the exact position, and the radial movement will disappear. At this time, the pressure collected by the second pressure sensor 5062 per unit time will be relatively stable.

[0064] When the pressure collected by the first pressure sensor 502 is equal and the pressure collected by the second pressure sensor 5062 per unit time is stable, the control module starts the operation of the electromagnet to fix the conical expansion sleeve 506 at the current position, and controls the stepper motor 304 to reset the fixing plate 501 and stop the rotation of the driving shaft 5. Finally, the staff tightens the fastening nut 5061 to the right (attached Figure 6 As shown), the conical expansion sleeve 506 is firmly locked with the driving shaft 5 and the driven shaft 4, thereby completing the replacement and adjustment process of the new tool.

[0065] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and / or characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A tool adjustment control mechanism for a CNC gear hobbing machine tool, comprising a workbench (1); a driving part (2), a driven part (3), a driving shaft (5) and a driven shaft (4) are arranged on the workbench (1); the driving part (2) is used to drive the driving shaft (5) to rotate; and the characteristics are: The driving shaft (5) and the driven shaft (4) are detachably connected; the driven shaft (4) and the driven part (3) are rotatably connected; the driven part (3) is used to push the driven shaft (4) to dock with the driving shaft (5); an outer cylinder (401) is provided on the outer side of the driving shaft (5) and the driven shaft (4); the driving shaft (5) and the driven shaft (4) are respectively rotatably matched with the outer cylinder (401); an elastic telescopic component is provided on the outer cylinder (401); the elastic telescopic component comprises a fixed plate (501), a first slide plate (503), a second slide plate (505) and a conical expansion sleeve (506); the fixed plate (501), the first slide plate (503) and the second slide plate (505) are all slidably matched with the outer cylinder (401); the fixed plate (501) and the first slide plate (503) are in close contact, and a first pressure sensor (502) is provided between the fixed plate (501) and the first slide plate (503), and the first pressure sensor (502) is used to collect the pressure between the fixed plate (501) and the first slide plate (503); a first spring (504) is provided on the side of the first slide plate (503) away from the fixed plate (501); the first spring (504) is away from the first slide plate ( One end of the second slide plate (503) is fixedly connected to the second slide plate (505); the second slide plate (505) is rotatably matched with the conical expansion sleeve (506) on the side away from the first spring (504); a second pressure sensor (5062) is provided on the inner wall of the conical expansion sleeve (506), and the second pressure sensor (5062) is used to collect the pressure between the driving shaft (5) or the driven shaft (4) and the inner wall of the conical expansion sleeve (506); the conical expansion sleeve (506) is provided with a pressure sensor for initially fastening the conical expansion sleeve (506) to the driving shaft (5) or the driven shaft (4). 4) and a secondary fastening assembly for locking the conical expansion sleeve (506) on the driving shaft (5) or the driven shaft (4); the driving shaft (5) is also provided with a limit assembly for limiting the sliding of the second slide plate (505); the driving part (2) and the driven part (3) are both provided with a moving assembly for driving the fixed plate (501) to slide synchronously; and also includes a control module; the control module is used to determine the installation status of the tool based on information from the first pressure sensor (502) and the second pressure sensor (5062), and to control the operation of the preliminary fastening assembly; The control module is used to determine whether the tool is centered based on the information collected by the first pressure sensor (502); if the pressures collected by the first pressure sensors (502) on both sides are not equal, the control module determines that the tool is not centered; if the pressures collected by the first pressure sensors (502) on both sides are equal, the control module determines that the tool is centered; based on the information collected by the second pressure sensor (5062), determine whether the tool has radial movement; if the pressure collected by the second pressure sensor (5062) within a unit time fluctuates, the control module determines that the tool has radial movement; if the pressure collected by the second pressure sensor (5062) within a unit time is stable, the control module determines that the tool does not have radial movement.

2. The tool adjustment control mechanism of the CNC gear hobbing machine tool according to claim 1, characterized in that: The preliminary fastening assembly comprises an electromagnet; the electromagnet is electrically connected to the control module; the driving shaft (5) and the driven shaft (4) are made of magnetic material.

3. The tool adjustment control mechanism of the CNC gear hobbing machine tool according to claim 2, characterized in that: The secondary fastening assembly comprises a fastening nut (5061); an external thread is arranged on the outer side of the conical expansion sleeve (506); and the fastening nut (5061) is threadably matched with the external thread.

4. The tool adjustment control mechanism of the CNC gear hobbing machine tool according to claim 3 is characterized in that: A tenon groove is provided in the driving shaft (5); a protrusion (402) is provided on the driven shaft (4); and the protrusion (402) is connected to the tenon groove and the tenon joint.

5. The tool adjustment control mechanism of the CNC gear hobbing machine tool according to claim 4, characterized in that: The limiting assembly comprises a limiting block (508), a cylinder (509) and a neck support plate (5092); a limiting groove (507) is provided on the driving shaft (5), and the limiting groove (507) is communicated with the tenon groove; the limiting block (508), the cylinder (509) and the neck support plate (5092) are all slidably matched with the limiting groove (507); the neck support plate (5092) is fixedly connected to the outer side of the cylinder (509); a tension spring (510) is provided in the limiting groove (507); two ends of the tension spring (510) are respectively fixedly connected to the bottom of the neck support plate (5092) and the side wall of the limiting groove (507); a telescopic groove is provided in the cylinder (509); A second spring (5091) is provided at the bottom of the contraction groove; the top of the second spring (5091) is fixedly connected to the bottom of the limit block (508); the limit block (508) is slidably matched with the expansion groove; a spring groove (511) is further provided at one side of the bottom of the limit groove (507); the spring groove (511) is respectively connected to the tenon groove and the limit groove (507); a return spring, an insert block (512) and a stop block (513) are provided in the spring groove (511); the insert block (512) is slidably matched with the spring groove (511); the top of the stop block (513) is fixedly connected to one side of the insert block (512); and the bottom of the stop block (513) extends into the tenon groove.

6. The tool adjustment control mechanism of the CNC gear hobbing machine tool according to claim 5, characterized in that: The moving assembly comprises a stepper motor (304) and a lead screw (305); the output shaft of the stepper motor (304) is axially fixedly connected to the lead screw (305); the lead screw (305) passes through the fixed plate (501), and the lead screw (305) and the fixed plate (501) are threadedly matched; the stepper motor (304) is electrically connected to the control module.

7. The tool adjustment control mechanism of the CNC gear hobbing machine tool according to claim 6, characterized in that: The driven part (3) is also provided with a locking assembly; the workbench (1) is provided with a slide groove (101); the driven part (3) is provided with a bolt (301); the bolt (301) passes through the driven part (3) and extends into the slide groove (101); an expansion plug (303) is provided at one end of the bolt (301) close to the slide groove (101); the expansion plug (303) is slidably engaged with the slide groove (101); and a fixing nut (302) is threadedly engaged at one end of the bolt (301) away from the slide groove (101).

8. The tool adjustment control mechanism of the CNC gear hobbing machine tool according to claim 7, characterized in that: The driven shaft (4) and the driving shaft (5) are of equal length.

9. The tool adjustment control mechanism of the CNC gear hobbing machine tool according to claim 8, characterized in that: The outer side of the fastening nut (5061) is provided with anti-slip grooves.

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