Special machine tool for milling tooth arc of clamping jaw of chuck

Abstract

The invention relates to the field of milling machine tools, in particular to a special machine tool for milling a tooth arc of a chuck and a jaw, and solves the problems that arc teeth can be automatically formed, a workpiece to be machined can automatically rotate to be formed, and continuous automatic machining can be achieved. An energy storage shaft is rotationally connected into the bottom plate, a sliding plate is slidably connected to the top of the bottom plate, and the sliding plate is in driving connection with the energy storage shaft. Meanwhile, the indexing error is calculated according to the displacement feedback signal, the stroke of the hydraulic cylinder is calibrated, and online closed-loop compensation of indexing precision is achieved. Through deep integration of mechanical transmission and intelligent control, the problems that in traditional machining, manual work is relied on, and precision consistency is poor are effectively solved, and efficient, high-precision and full-automatic milling machining of the tooth arc of the clamping jaw is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of milling machine tools, in particular to a special machine tool for tooth arc milling of chuck jaws. BACKGROUND

[0002] In the field of mechanical manufacturing, as a kind of fixture widely used in various machine tools, the performance and precision of the chuck jaws play a crucial role in the clamping and machining quality of workpieces. With the continuous development of modern industry, the processing requirements for chuck jaws are increasingly improved.

[0003] Most of the traditional processing technology of chuck jaws adopts general machine tools for manual operation or simple mechanized processing. In terms of arc tooth processing, it is usually necessary for the operator to use conventional milling cutters on a general milling machine to gradually cut based on rich experience and superb skills. This processing method not only has low efficiency, but also due to the limitations of manual operation, it is difficult to guarantee the machining precision and consistency of the arc teeth, resulting in different gears being processed, which cannot be used.

[0004] In addition, in the traditional processing process, the workpiece to be processed usually needs to be manually indexed and rotated to realize tooth-by-tooth processing of the arc teeth. This not only increases the labor intensity of workers, but also due to the instability of manual operation, it is easy to cause slight changes in the clamping position of the workpiece, thereby affecting the machining precision. At the same time, this processing method is difficult to realize continuous automatic processing, and there is a lot of stop and waiting time in the processing process, which greatly reduces the production efficiency and cannot meet the needs of modern large-scale industrial production.

[0005] Therefore, the present application provides a special machine tool for tooth arc milling of chuck jaws to solve the above problems. SUMMARY

[0006] In view of the above situation, in order to overcome the defects of the prior art, the present application provides a special machine tool for tooth arc milling of chuck jaws to solve the above problems of being able to automatically open arc teeth, automatically rotating the workpiece to be processed for opening, and realizing continuous automatic processing.

[0007] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows: The special machine tool for milling the tooth arc of chuck claw comprises a base and a main frame, a bottom plate is installed on the top of the base, an energy storage shaft is rotationally connected in the bottom plate, a sliding plate is slidingly connected on the top of the bottom plate, the sliding plate is drivingly connected with the energy storage shaft, a clamping plate is slidingly connected on the upper portion of the sliding plate, a driving rod is slidingly connected on the inner wall of the sliding plate, and the driving rod is drivingly connected with the sliding plate; the main frame is fixedly installed on the side wall of the base, a milling box is fixedly installed on the side wall of the main frame, a pressing plate is slidingly connected on the bottom of the milling box, the pressing plate is matched with the energy storage shaft and the driving rod, the top of the pressing plate is fixedly connected with the output end of a hydraulic cylinder, and the hydraulic cylinder is fixedly installed on the top of the milling box; through the clamping plate, the device can automatically clamp the workpiece to be processed, can automatically drive the workpiece to rotate during processing, realizes automatic milling to open the arc teeth, avoids unstable operation caused by manual rotation and the phenomenon that the clamping position changes, can automatically displace after one workpiece is processed, realizes continuous processing, reduces the time waste caused by clamping the workpiece and adjusting and rotating the workpiece, improves the production efficiency, and realizes integrated automatic processing.

[0008] It also comprises a central controller, a pressure sensor for monitoring the clamping force of the clamping plate, and a displacement sensor for monitoring the displacement of the driving tooth plate; The pressure sensor is embedded in the positioning column and directly or indirectly contacts the workpiece clamping surface; the displacement sensor is fixedly installed on the inner wall of the sliding plate, and the detection end thereof is aligned with the driving tooth plate; The signal output ends of the pressure sensor and the displacement sensor are electrically connected with the signal input end of the central controller, and the control output end of the central controller is electrically connected with the electric control unit of the hydraulic cylinder; The central controller is configured to perform the following operations: a. receiving the real-time signal of the pressure sensor and comparing it with the preset clamping force safety threshold range; if the pressure value is lower than the lower limit of the threshold, the hydraulic cylinder is controlled to increase the pressing degree; if the pressure value is higher than the upper limit of the threshold, the hydraulic cylinder is controlled to reduce the pressing degree, so as to realize self-adaptive and accurate control of the clamping force; b. receiving the real-time signal of the displacement sensor, recording the actual reset displacement of the driving tooth plate under the action of the compression spring, comparing the actual displacement with the theoretical displacement (corresponding to the preset indexing angle), calculating the indexing error, and compensating the error value to the downstroke instruction of the hydraulic cylinder during the next indexing operation, so as to realize online closed-loop correction of indexing accuracy.

[0009] Preferably, the number of clamping plates is multiple, and the multiple clamping plates are of the same structure.

[0010] Preferably, the top of the sliding plate is rotationally connected with a positioning column, the outer wall of the positioning column is provided with clamping plates through telescopic columns, the outer wall of the telescopic column is provided with top extension springs, the number of the clamping plates is two, the top of the sliding plate is slidably connected with a limiting ring, the limiting ring is located on the outer side wall of the positioning column and the inner side of the clamping plates, the top of the sliding plate is slidably connected with a connecting plate, the connecting plate is located on the outer side of the clamping plates, the bottom of the connecting plate is fixedly provided with abutting inclined blocks, the thickness of the abutting inclined blocks gradually decreases from top to bottom; the bottom of the limiting ring is fixedly provided with an abutting plate, one end of the abutting plate is fixedly provided with a return spring, the other end of the return spring is fixedly connected with the inner side wall of the sliding plate, the outer wall of one end of the abutting plate is provided with an abutting groove, and the inclined surface end of the abutting inclined block is located in the abutting groove; when the device is in use, the workpiece to be processed is placed on the upper part of the sliding plate, at this time, the bottom of the workpiece to be processed abuts against the top of the connecting plate, and the inner side wall of the workpiece abuts against the outer wall of the clamping plate; after the workpiece is pressed down, the connecting plate is displaced downward, the inclined surface end of the abutting inclined block abuts against the abutting groove, thereby realizing the outward displacement of the abutting plate, the outward displacement of the limiting ring by the abutting plate, the abutting and limiting of the clamping plate, after the connecting plate is lowered to the lowermost part, the clamping plate is extended to clamp the workpiece; through the arrangement of the positioning column and the clamping plate, the clamping plate can be extended under the action of the top extension spring after the workpiece is placed, the functions of automatic positioning and clamping are realized, the deviation of clamping is avoided, meanwhile, the limiting ring can extend to limit the clamping plate, so that the device can avoid the phenomenon that the workpiece is not lowered to the top of the sliding plate and is not completely installed for processing, and prevent the deviation of workpiece processing caused by vibration.

[0011] Preferably, the bottom of the driving rod is fixedly installed with a driving gear plate, the bottom of the driving gear plate is fixedly installed with a compression spring, and the bottom of the compression spring is fixedly installed on the inner bottom wall of the sliding plate; the inner side wall of the sliding plate is rotationally connected with a driven shaft and a driving shaft, the outer wall of the driven shaft is one-way drivingly connected with a driving gear, the driving gear is matched with the driving gear plate, the outer wall of one end of the driven shaft is installed with a driving bevel gear, the driving bevel gear is meshingly connected with a connecting bevel gear, and the connecting bevel gear is fixedly installed on the outer wall of one end of the driving shaft; the outer wall of the other end of the driving shaft is installed with a first rotating bevel gear, the first rotating bevel gear is meshingly connected with a second rotating bevel gear, the second rotating bevel gear is installed on the outer wall of a rotating shaft, the rotating shaft is rotationally connected with the inner bottom wall of the sliding plate, and the top of the rotating shaft is fixedly connected with the top of the positioning column; when the pressing plate is pressed down under the driving of the hydraulic cylinder, the driving rod will be displaced downward, and since the driving gear is one-way drivingly connected, the downward movement of the driving gear plate will not drive the driven shaft to rotate, and when the driving gear plate resets upward, the driving gear drives the driven shaft to rotate, under the action of the plurality of bevel gears, the driving shaft is driven to rotate, the driving shaft drives the positioning column to rotate, at this time, the milling cutter is in a state of opening an arc tooth, the rotation of the positioning column can drive the workpiece to rotate by a certain angle, thereby facilitating the opening of another arc tooth; through the setting of the driving gear plate, the workpiece can be automatically driven to rotate by a certain angle when the arc tooth is opened, the milling cutter has a certain downward displacement, the workpiece of the device can be ensured to rotate by the same angle each time, the synchronous opening of the same interval arc tooth is realized, the phenomenon of different opening angles caused by manual rotation is avoided, the workpiece rotation of the device can be linked with the milling cutter downward opening to form a linkage function, integrated operation is realized, and the phenomenon of workpiece rotation when the arc tooth is not opened is avoided.

[0012] Preferably, the outer wall of the driven shaft is installed with a limiting spring, the other end of the limiting spring is fixedly connected with one end of a limiting plate, one end of the limiting plate is hingedly connected with the outer wall of the driven shaft, the other end of the limiting plate is matched with a chute, and the chute is located on the inner wall of the driving gear; the number of the chute is a plurality; when the driving gear plate descends, one end of the limiting plate abuts against the inclined surface of the chute, the descent of the driving gear plate will not drive the driving gear to rotate, and the driven shaft is in a stationary state, and when the driving gear plate resets and moves upward, the limiting plate in the driving gear is clamped with the chute at this time, the driving gear plate drives the driving gear to rotate, and the workpiece on the outer wall of the positioning column is driven to rotate through the driven shaft.

[0013] Preferably, the outer wall of the driving tooth plate is fixedly provided with external teeth, the inside of the driving tooth plate is slidably connected with an adjusting plate, the adjusting plate is arranged in a staggered manner with the external teeth, the outer wall of the adjusting plate is provided with adjusting teeth, and the number of the adjusting plates is plural; when the device is in use, the number of teeth on the outer wall of the driving tooth plate can be changed by sliding the adjusting plate, and when it is required to rotate the workpiece by a large angle or a small angle, the number of external teeth can be controlled to realize the opening of different arc teeth and the production of gears with different arc tooth spacings.

[0014] Preferably, the bottom of the sliding plate is fixedly provided with a sliding groove tooth plate; the top of the bottom plate is provided with a sliding groove, the sliding groove tooth plate is slidably connected in the inside of the sliding groove, the outer wall of the energy storage shaft is provided with friction lines, the outer wall of one end of the energy storage shaft is provided with a pressing gear, the other end of the energy storage shaft is provided with a volute spring, the other end of the volute spring is fixedly connected with the inner wall of the bottom plate, the outer wall of the middle part of the energy storage shaft is provided with a meshing gear, the meshing gear is meshingly connected with a driven gear, the driven gear is installed on the outer wall of one end of a mounting shaft, the mounting shaft is rotatably connected with the inner wall of the bottom plate, the outer wall of the other end of the mounting shaft is provided with a rotating gear, the rotating gear is located in the inside of the sliding groove and is meshingly connected with the sliding groove tooth plate, the number of the mounting shafts is plural, and the plural mounting shafts are drivingly connected through a transmission belt; after the hydraulic cylinder of the device is pressed for a certain number of times, it can stop for a certain period of time and then work again, when the pressing plate of the device is lowered, the energy storage shaft will rotate at this time, and when the pressing plate is upwardly displaced, the energy storage shaft will not immediately reset and reverse due to the action of the friction lines, the multiple pressing of the pressing plate can make the volute spring continuously store energy, when the hydraulic cylinder stops working and stops for a certain period of time, the energy storage shaft drives the mounting shaft to rotate at this time, so that the rotating gear drives the sliding groove tooth plate to displace, and then the workpiece to be processed is replaced; through the arrangement of the energy storage shaft, the device can automatically replace the workpiece to be processed, after one workpiece is processed, the workpiece can be automatically replaced to realize automatic operation, and the energy storage shaft of the device and the pressing of the milling cutter realize linkage function.

[0015] Preferably, one end of the bottom of the lower pressing plate is provided with a lower pressing tooth plate matched with the lower pressing gear, and the other end of the bottom of the lower pressing plate is provided with a top abutting column matched with the driving rod; the middle part of the bottom of the lower pressing plate is provided with a bottom ring, the inside of the bottom ring is slidably connected with a telescopic ring, the outer wall of the telescopic ring is provided with a threaded block, the threaded block is threadedly connected to the outer wall of a threaded rod, the threaded rod is rotationally connected to the inner wall of the bottom ring, the outer wall of the bottom of the threaded rod is provided with a dial plate, and the dial plate is located on the inner wall of the bottom ring; when the lower pressing plate of the device is pressed down, the lower pressing tooth plate is meshed and connected with the lower pressing gear, and the top abutting column is abutted with the top of the driving rod, so that automatic operation is realized; the milling cutter of the device is installed in the inside of the telescopic ring, and the height of the telescopic ring can be adjusted by rotating the dial plate, so that fine operation of the device is ensured.

[0016] The beneficial effects of the present application are: 1、The device can automatically clamp the workpiece to be processed through the setting of the clamping plate, can automatically drive the workpiece to rotate during processing, realize automatic milling to open the arc teeth, avoid unstable operation caused by manual rotation and the phenomenon that the clamping position changes, and after one workpiece is processed, the device can automatically displace to realize continuous processing, reduce the time waste caused by clamping the workpiece and adjusting and rotating the workpiece, improve the production efficiency, and realize integrated automatic processing.

[0017] 2、The device can realize the functions of automatic positioning and clamping through the setting of the positioning column and the clamping plate, avoid the phenomenon that the clamping deviates, and the limiting ring can extend to limit the clamping plate, so that the device can avoid the phenomenon that the workpiece is not placed on the top of the sliding plate and is processed before being installed, and prevent the phenomenon that the workpiece processing deviates due to vibration.

[0018] 3、The device can automatically drive the workpiece to rotate by a certain angle when opening the arc teeth, and the milling cutter descends by a certain height, so that the device can ensure that the workpiece rotates by the same angle each time, realize synchronous opening of the same interval arc teeth, avoid the phenomenon that the opening angle is different caused by manual rotation, the workpiece rotation of the device can be linked with the milling cutter to open, realize integrated operation, and avoid the phenomenon that the workpiece rotates when the arc teeth are not opened.

[0019] 4、The device can change the number of teeth on the outer wall of the driving tooth plate by sliding the adjusting plate, so that the device can meet the needs of different arc teeth and produce gears with different arc tooth spacing.

[0020] 5、The device can automatically replace the workpiece to be processed by setting the energy storage shaft, and can automatically replace the workpiece after one workpiece is processed, realizing automatic operation.

[0021] 6、The lower pressing plate is in meshing connection with the lower pressing gear when pressing, and the abutting column is in abutting connection with the top of the driving rod, realizing automatic operation.

[0022] 7、The device can realize self-adaptive and accurate clamping of the workpiece by introducing clamping force sensing and closed-loop control, fundamentally eliminating processing errors or workpiece damage caused by improper clamping force, and improving the processing yield.

[0023] 8、The device can automatically compensate for wear and tear errors in the mechanical transmission chain through displacement sensing and indexing compensation mechanism, long-term high indexing accuracy, and reduced equipment maintenance cost and dependence on operator experience.

[0024] 9、The device realizes the upgrade from "mechanization" to "intelligentization" through the collaborative design of mechanics, sensing and control, which is not obvious to those skilled in the art and has outstanding substantial features and significant progress. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a schematic view of the front view of the device; Figure 2 is a schematic view of the bottom plate and the sliding plate of the device; Figure 3 is a schematic view of the sliding plate of the device; Figure 4 is a schematic view of the device; Figure 3 is a schematic view of the device; Figure 5 is a schematic view of the device; Figure 3 is a schematic view of the device; Figure 6 is a schematic view of the device; Figure 7 is a schematic view of the device; Figure 8 is a schematic view of the bottom plate of the present application; Figure 9 is a schematic view of the bottom of the sliding plate of the present application; Figure 10 is a schematic view of the bottom of the pressing plate of the present application; Figure 11 is a schematic view of the connection between the threaded block and the threaded rod of the present application.

[0026] Fig. 1, base; 2, bottom plate; 201, sliding groove; 202, driven gear; 203, mounting shaft; 204, rotating gear; 205, transmission belt; 3, sliding plate; 301, positioning column; 302, top extension spring; 303, limiting ring; 304, connecting plate; 305, abutting inclined block; 306, abutting plate; 307, return spring; 308, abutting groove; 309, sliding groove toothed plate; 4, clamping plate; 5, energy storage shaft; 501, pressing gear; 502, volute spring; 503, meshing gear; 6, drive rod; 601, drive toothed plate; 602, compression spring; 603, driven shaft; 604, drive shaft; 605, drive gear; 606, drive bevel gear; 607, connecting bevel gear; 608, first rotating bevel gear; 609, second rotating bevel gear; 610, rotating shaft; 611, limiting spring; 612, limiting plate; 613, inclined groove; 614, external tooth; 615, adjusting plate; 616, adjusting tooth; 7, main frame; 8, milling box; 9, pressing plate; 901, pressing toothed plate; 902, abutting column; 903, bottom ring; 904, telescopic ring; 905, threaded block; 906, threaded rod; 907, dial 10, hydraulic cylinder. DETAILED DESCRIPTION

[0027] The embodiments of the present application will be described in detail below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application, and are not intended to limit the protection scope of the present application.

[0028] A special machine tool for milling the tooth arc of a chuck claw, as shown in Figures 1-2As shown, including base 1 and main frame 7, the top of base 1 is provided with bottom plate 2, the inside of bottom plate 2 is rotatably connected with energy storage shaft 5, the top of bottom plate 2 is slidably connected with sliding plate 3, sliding plate 3 is drivingly connected with energy storage shaft 5, the upper portion of sliding plate 3 is slidably connected with clamping plate 4, the inner wall of sliding plate 3 is slidably connected with driving rod 6, driving rod 6 is drivingly connected with sliding plate 3; The side wall of base 1 is fixedly provided with main frame 7, the side wall of main frame 7 is fixedly provided with milling box 8, the bottom of milling box 8 is slidably connected with pressing plate 9, pressing plate 9 is matched with energy storage shaft 5 and driving rod 6, the top of pressing plate 9 is fixedly connected with the output end of hydraulic cylinder 10, and hydraulic cylinder 10 is fixedly installed on the top of milling box 8; The clamping plate 4 is arranged, so that the device can automatically clamp the workpiece to be machined, and the workpiece can be automatically driven to rotate during machining, automatic milling is realized, the instability caused by manual rotation is avoided, and the phenomenon that the clamping position changes is caused. After a workpiece is machined, the device can automatically displace, realizes continuous machining, reduces the time waste caused by clamping the workpiece and adjusting and rotating the workpiece, improves production efficiency, and realizes integrated automatic machining.

[0029] As shown in the accompanying drawings Figures 2-3 As shown, the number of clamping plates 4 is multiple, and the multiple clamping plates 4 are identical in structure.

[0030] As shown in the accompanying drawings Figures 3-4As shown, the top of the sliding plate 3 is rotatably connected with a positioning column 301, the inside of the positioning column 301 is embedded with a pressure sensor, the detection end of the pressure sensor is in contact with the root of the telescopic column or the clamping plate 4, which is used for indirectly detecting the radial clamping force of the workpiece. The outer wall of the positioning column 301 is provided with the clamping plate 4 through the telescopic column, the outer wall of the telescopic column is provided with a top extension spring 302, the number of the clamping plate 4 is two, the top of the sliding plate 3 is slidably connected with a limiting ring 303, the limiting ring 303 is located on the outer side wall of the positioning column 301 and on the inner side of the clamping plate 4, the top of the sliding plate 3 is slidably connected with a connecting plate 304, the connecting plate 304 is located on the outer side of the clamping plate 4, the bottom of the connecting plate 304 is fixedly provided with an abutting inclined block 305, the thickness of the abutting inclined block 305 gradually decreases from top to bottom; the bottom of the limiting ring 303 is fixedly provided with an abutting plate 306, one end of the abutting plate 306 is fixedly provided with a return spring 307, the other end of the return spring 307 is fixedly connected with the inner side wall of the sliding plate 3, the outer wall of one end of the abutting plate 306 is provided with an abutting groove 308, the inclined surface end of the abutting inclined block 305 is located in the inside of the abutting groove 308; when the device is in use, the workpiece to be processed is placed on the upper part of the sliding plate 3, at this time the bottom of the workpiece to be processed abuts against the top of the connecting plate 304, and the inner side wall of the workpiece abuts against the outer wall of the clamping plate 4, after the workpiece is pressed down, at this time the connecting plate 304 is displaced downward, the inclined surface end of the abutting inclined block 305 will abut against the abutting groove 308, thereby realizing the outward displacement of the abutting plate 306, the abutting plate 306 pulls the limiting ring 303 to displace outward, realizing the abutting limiting of the clamping plate 4, after the connecting plate 304 descends to the lowermost part, the clamping plate 4 extends out to clamp the workpiece; through the arrangement of the positioning column 301 and the clamping plate 4, the workpiece is placed in the device, the clamping plate 4 extends out under the action of the top extension spring 302, realizing the functions of automatic positioning and clamping, avoiding the deviation of clamping, at the same time, the limiting ring 303 can extend out to limit the clamping plate 4, so that the device can avoid the phenomenon that the workpiece is not installed on the top of the sliding plate 3 and processed, preventing the deviation of workpiece processing caused by vibration and the like.

[0031] As shown in the accompanying drawings Figure 3 and the accompanying drawings Figure 5As shown, the bottom of the driving rod 6 is fixedly provided with a driving gear plate 601, and a displacement sensor is also fixedly provided on the inner wall of the sliding plate 3, which is a high-precision grating ruler or laser range finder, the detection head of which is aligned with the side surface of the driving gear plate 601, and is used for accurately measuring the displacement of the driving gear plate 601 in the vertical direction. The bottom of the driving gear plate 601 is fixedly provided with a compression spring 602, the bottom of the compression spring 602 is fixedly provided on the inner bottom wall of the sliding plate 3, the inner side wall of the sliding plate 3 is rotatably connected with a driven shaft 603 and a driving shaft 604, the outer wall of the driven shaft 603 is unidirectionally and drivingly connected with a driving gear 605, the driving gear 605 is matched with the driving gear plate 601, the outer wall of one end of the driven shaft 603 is provided with a driving bevel gear 606, the driving bevel gear 606 is meshingly connected with a connecting bevel gear 607, the connecting bevel gear 607 is fixedly provided on the outer wall of one end of the driving shaft 604, the outer wall of the other end of the driving shaft 604 is provided with a first rotating bevel gear 608, the first rotating bevel gear 608 is meshingly connected with a second rotating bevel gear 609, the second rotating bevel gear 609 is provided on the outer wall of a rotating shaft 610, the rotating shaft 610 is rotatably connected with the inner bottom wall of the sliding plate 3, and the top of the rotating shaft 610 is fixedly connected with the top of the positioning column 301. When the pressing plate 9 is pressed under the driving of the hydraulic cylinder 10, the driving rod 6 will be displaced downward, and since the driving gear 605 is unidirectionally and drivingly connected, the downward displacement of the driving gear plate 601 will not drive the driven shaft 603 to rotate, and when the driving gear plate 601 is reset upward, the driving gear 605 drives the driven shaft 603 to rotate, under the action of the plurality of bevel gears, the driving shaft 604 is driven to rotate, and the driving shaft 604 drives the positioning column 301 to rotate, at this time, the milling cutter is in a state of opening an arc tooth, and the rotation of the positioning column 301 can drive the workpiece to rotate by a certain angle, which is convenient for opening an arc tooth again. Through the arrangement of the driving gear plate 601, the workpiece can be automatically driven to rotate by a certain angle when the arc tooth is opened, and the milling cutter has a certain downward displacement, which can ensure that the workpiece of the device rotates by the same angle each time, realizes the opening of synchronous and same-interval arc teeth, avoids the phenomenon that the opening angle is different due to manual rotation, and the workpiece rotation of the device can be linked with the milling cutter downward displacement to form a linkage function, realizes integrated operation, and avoids the phenomenon that the workpiece rotates when the arc tooth is not opened.

[0032] Specifically, the machine tool is also provided with a central controller, which can be installed in the electric control cabinet of the milling box 8 or the main frame 7. The signal output ends of the pressure sensor and the displacement sensor are connected with the signal input end of the central controller through a cable or a wireless manner. The control output end of the central controller is electrically connected with the proportional valve or the servo driver of the driving hydraulic cylinder 10, so as to accurately control the pressing speed, force and stroke of the hydraulic cylinder 10.

[0033] The central controller pre-stores a control program, and its working logic is as follows: when the workpiece is placed, the hydraulic cylinder 10 is pressed down, the controller reads the pressure sensor data in real time to ensure that the clamping force is stable within the preset range. After milling is completed, the hydraulic cylinder 10 is lifted up, the driving tooth plate 601 is reset under the action of the compression spring 602, and the displacement sensor records the accurate reset stroke. The controller calculates the actual angle of this indexing and compares it with the theoretical value. When the next milling cycle starts, the controller fine-tunes the final pressing position of the hydraulic cylinder 10 to compensate for the indexing error of the last time, thereby realizing closed-loop control of precision.

[0034] As shown in the accompanying Figure 6 The outer wall of the driven shaft 603 is provided with a limiting spring 611, one end of the limiting spring 611 is fixedly connected with one end surface of a limiting plate 612, one end of the limiting plate 612 is hinged to the outer wall of the driven shaft 603, the other end of the limiting plate 612 is matched with a slanted groove 613, and the slanted groove 613 is located on the inner wall of the driving gear 605, and the number of the slanted grooves 613 is multiple; when the driving tooth plate 601 is lowered, one end of the limiting plate 612 abuts against the inclined surface of the slanted groove 613, and the lowering of the driving tooth plate 601 will not drive the driving gear 605 to rotate, and the driven shaft 603 is in a stationary state, and when the driving tooth plate 601 is reset to displace upward, the limiting plate 612 inside the driving gear 605 is clamped with the slanted groove 613 at this time, so that the driving tooth plate 601 drives the driving gear 605 to rotate, and the workpiece on the outer wall of the positioning column 301 is driven to rotate by the driven shaft 603.

[0035] As shown in the accompanying Figure 7 The outer wall of the driving tooth plate 601 is fixedly provided with external teeth 614, the inside of the driving tooth plate 601 is slidably connected with an adjusting plate 615, the adjusting plate 615 is arranged in a staggered manner with the external teeth 614, the outer wall of the adjusting plate 615 is provided with adjusting teeth 616, and the number of the adjusting plates 615 is multiple; when the device is used, the number of the teeth on the outer wall of the driving tooth plate 601 can be changed by sliding the adjusting plate 615, and when it is required to rotate the workpiece by a large angle or a small angle, the number of the external teeth can be controlled to realize the opening of different arc teeth and produce gears with different arc tooth spacings.

[0036] As shown in the accompanying Figure 2 and the accompanying Figures 8-9As shown, the bottom of the sliding plate 3 is fixedly provided with a sliding groove tooth plate 309, the top of the bottom plate 2 is provided with a sliding groove 201, the sliding groove tooth plate 309 is slidably connected in the sliding groove 201, the outer wall of the energy storage shaft 5 is provided with a friction pattern, the outer wall of one end of the energy storage shaft 5 is provided with a pressing gear 501, the other end of the energy storage shaft 5 is provided with a volute spring 502, the other end of the volute spring 502 is fixedly connected with the inner wall of the bottom plate 2, the outer wall of the middle part of the energy storage shaft 5 is provided with an engaging gear 503, the engaging gear 503 is engagedly connected with a driven gear 202, the driven gear 202 is mounted on the outer wall of one end of a mounting shaft 203, the mounting shaft 203 is rotatably connected with the inner wall of the bottom plate 2, the outer wall of the other end of the mounting shaft 203 is provided with a rotating gear 204, the rotating gear 204 is located in the sliding groove 201 and is engagedly connected with the sliding groove tooth plate 309, the number of the mounting shafts 203 is plural, and the plural mounting shafts 203 are drivingly connected through a transmission belt 205; the hydraulic cylinder 10 of the device can stop for a certain period of time after a certain number of pressing actions, and then work again, when the pressing plate 9 descends, the energy storage shaft 5 will rotate at this time, when the pressing plate 9 displaces upward, the energy storage shaft 5 will not immediately reset and reverse due to the action of the friction pattern, the multiple pressing of the pressing plate 9 can make the volute spring 502 continuously store energy, when the hydraulic cylinder 10 stops and stops for a certain period of time, the energy storage shaft 5 drives the mounting shaft 203 to rotate at this time, so that the rotating gear 204 drives the sliding groove tooth plate 309 to displace, thereby achieving the replacement of the workpiece to be processed; through the arrangement of the energy storage shaft 5, the device can automatically replace the workpiece to be processed, after the processing of a workpiece is completed, the workpiece can be automatically replaced, automatic operation is realized, and the energy storage shaft 5 of the device and the pressing of the milling cutter realize linkage function. Specifically, since the outer wall of the energy storage shaft 5 is provided with a friction pattern, there is a static friction force between the outer wall of the energy storage shaft 5 and the inner wall of the bottom plate 2. When the pressing plate 9 is pressed, the pressing gear 901 is engaged with the pressing gear 501, the energy storage shaft 5 is driven to rotate and compress the volute spring 502 to store energy; when ascending, due to the design of the friction pattern and the pre-tightening force of the volute spring 502, the energy storage shaft 5 will not immediately reverse under the action of the static friction force, thereby realizing the gradual accumulation of energy. The design ensures that the volute spring 502 can continuously store energy in the multiple pressing process, until the sliding plate 3 is displaced to achieve automatic replacement of the workpiece.

[0037] The mechanism is not dependent on simple friction, but is realized through asymmetric motion control of the friction pattern structure + volute spring pre-tightening + one-way transmission design, and has clear mechanical rationality.

[0038] As shown in the accompanying drawings Figures 10-11As shown, one end of the bottom of the lower pressing plate 9 is provided with a lower pressing tooth plate 901 matched with the lower pressing gear 501, and the other end of the bottom of the lower pressing plate 9 is provided with a top abutting column 902 matched with the driving rod 6; the middle part of the bottom of the lower pressing plate 9 is provided with a bottom ring 903, the inside of the bottom ring 903 is slidably connected with an expansion ring 904, the outer wall of the expansion ring 904 is provided with a threaded block 905, the threaded block 905 is threadedly connected to the outer wall of a threaded rod 906, the threaded rod 906 is rotationally connected to the inner wall of the bottom ring 903, the outer wall of the bottom of the threaded rod 906 is provided with a dial plate 907, and the dial plate 907 is located on the inner wall of the bottom ring 903; when the lower pressing plate 9 of the device is pressed, the lower pressing tooth plate 901 is meshed with the lower pressing gear 501, and the top abutting column 902 abuts against the top of the driving rod 6, so that automatic operation is realized, the milling cutter of the device is installed in the inside of the expansion ring 904, and meanwhile, the device can be rotated to adjust the height of the expansion ring 904, so that fine adjustment is realized and fine operation of the device is ensured.

[0039] It should be noted that, in the description of the present application, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is merely for the convenience of description, and does not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0040] In addition, it should also be noted that, in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] So far, the technical scheme of the present application has been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to related technical features without departing from the principles of the present application, and the technical scheme after the changes or replacements will fall within the protection scope of the present application.

Claims

1. A special machine tool for chuck and claw tooth arc milling, comprising a base (1) and a main frame (7), characterized in that: A bottom plate (2) is installed on the top of the base (1), and an energy storage shaft (5) is rotatably connected inside the bottom plate (2). A friction pattern is provided on the outer wall of the energy storage shaft (5). A downward pressure gear (501) is installed on the outer wall of one end of the energy storage shaft (5), and a volute spring (502) is installed on the other end of the energy storage shaft (5). The other end of the volute spring (502) is fixedly connected to the inner wall of the bottom plate (2). A sliding plate (3) is slidably connected to the top of the bottom plate (2), and the sliding plate (3) is drive-connected to the energy storage shaft (5). A clamping plate (4) is slidably connected to the upper part of the sliding plate (3), and a driving rod (6) is slidably connected to the inner wall of the sliding plate (3). The driving rod (6) is drive-connected to the sliding plate (3); A driving tooth plate (601) is fixedly mounted on the bottom of the driving rod (6), an outer tooth (614) is fixedly mounted on the outer wall of the driving tooth plate (601), an adjusting plate (615) is slidably connected to the interior of the driving tooth plate (601), the adjusting plate (615) and the outer tooth (614) are staggered, and an adjusting tooth (616) is mounted on the outer wall of the adjusting plate (615); The main frame (7) is fixedly mounted on the side wall of the base (1), a milling box (8) is fixedly mounted on the side wall of the main frame (7), a lower pressing plate (9) is slidably connected to the bottom of the milling box (8), the lower pressing plate (9) matches the energy storage shaft (5) and the driving rod (6), the top of the lower pressing plate (9) is fixedly connected to the output end of the hydraulic cylinder (10), and the hydraulic cylinder (10) is fixedly mounted on the top of the milling box (8); A central controller, a pressure sensor for monitoring the clamping force of the clamping plate (4), and a displacement sensor for monitoring the displacement of the driving tooth plate (601); The signal output terminals of the pressure sensor and the displacement sensor are electrically connected to the signal input terminal of the central controller, and the control output terminal of the central controller is electrically connected to the electronic control unit of the hydraulic cylinder (10); The central controller is configured to: Dynamically adjusting the downward pressure of the hydraulic cylinder (10) according to the feedback signal of the pressure sensor to control the workpiece clamping force within a preset range; The indexing error is calculated based on the feedback signal of the displacement sensor, and the subsequent indexing action is compensated by calibrating the stroke of the hydraulic cylinder (10).

2. A chuck claw tooth arc milling special machine tool according to claim 1, characterized in that: There are multiple card plates (4), and the multiple card plates (4) have the same structure.

3. A special machine tool for chuck and claw tooth arc milling according to claim 2, characterized in that: The top of the sliding plate (3) is rotatably connected to a positioning column (301), the outer wall of the positioning column (301) is installed with a card plate (4) through a telescopic column, the outer wall of the telescopic column is installed with a top extension spring (302), the number of the card plates (4) is two, the top of the sliding plate (3) is slidably connected to a limit ring (303), the limit ring (303) is located on the outer wall of the positioning column (301) and on the inner side of the card plate (4), the top of the sliding plate (3) is slidably connected to a connecting plate (304), the connecting plate (304) is located on the outer side of the card plate (4), the bottom of the connecting plate (304) is fixedly installed with a top oblique block (305), and the thickness of the top oblique block (305) gradually decreases from top to bottom; A top plate (306) is fixedly mounted on the bottom of the limiting ring (303), a return spring (307) is fixedly mounted on one end of the top plate (306), the other end of the return spring (307) is fixedly connected to the inner wall of the sliding plate (3), a top groove (308) is provided on the outer wall of one end of the top plate (306), and the inclined end of the top inclined block (305) is located inside the top groove (308).

4. A special machine tool for chuck and claw tooth arc milling according to claim 3, characterized in that: A compression spring (602) is fixedly mounted on the bottom of the driving tooth plate (601), and the bottom of the compression spring (602) is fixedly mounted on the inner bottom wall of the sliding plate (3); The inner side wall of the sliding plate (3) is rotatably connected to a driven shaft (603) and a driving shaft (604); the outer wall of the driven shaft (603) is unidirectionally driven and connected to a driving gear (605); the driving gear (605) matches the driving gear plate (601); a driving bevel gear (606) is installed on the outer wall of one end of the driven shaft (603); the driving bevel gear (606) is meshed and connected with a connecting bevel gear (607); and the connecting bevel gear (607) is fixedly installed on the outer wall of one end of the driving shaft (604); A first rotating bevel gear (608) is installed on the outer wall of the other end of the driving shaft (604), and the first rotating bevel gear (608) is meshed with a second rotating bevel gear (609). The second rotating bevel gear (609) is installed on the outer wall of the rotating shaft (610). The rotating shaft (610) is rotatably connected to the inner bottom wall of the sliding plate (3), and the top of the rotating shaft (610) is fixedly connected to the top of the positioning column (301).

5. A special machine tool for chuck and claw tooth arc milling according to claim 4, characterized in that: A limiting spring (611) is installed on the outer wall of the driven shaft (603), the other end of the limiting spring (611) is fixedly connected to one end face of the limiting plate (612), one end of the limiting plate (612) is hinged on the outer wall of the driven shaft (603), the other end of the limiting plate (612) matches the inclined groove (613), the inclined groove (613) is located on the inner wall of the driving gear (605), and the number of the inclined grooves (613) is multiple.

6. A special machine tool for chuck and claw tooth arc milling according to claim 5, characterized in that: There are multiple adjustment plates (615).

7. A special machine tool for chuck and claw tooth arc milling according to claim 6, characterized in that: A sliding groove tooth plate (309) is fixedly mounted on the bottom of the sliding plate (3); A slide groove (201) is provided on the top of the base plate (2), the slide groove tooth plate (309) is slidably connected to the inside of the slide groove (201), a meshing gear (503) is installed on the outer wall of the middle part of the energy storage shaft (5), the meshing gear (503) is meshed with the driven gear (202), the driven gear (202) is installed on the outer wall of one end of the installation shaft (203), and the installation shaft (203) is rotatably connected to the inner wall of the base plate (2); A rotating gear (204) is installed on the outer wall of the other end of the installation shaft (203). The rotating gear (204) is located inside the slide groove (201) and is meshed with the slide groove tooth plate (309). There are multiple installation shafts (203), and the multiple installation shafts (203) are driven and connected by a transmission belt (205).

8. A special machine tool for chuck and claw tooth arc milling according to claim 7, characterized in that: A lower pressure tooth plate (901) is installed at one end of the bottom of the lower pressure plate (9), and the lower pressure tooth plate (901) matches the lower pressure gear (501). A top support column (902) is installed at the other end of the bottom of the lower pressure plate (9), and the top support column (902) matches the driving rod (6); A bottom ring (903) is provided in the middle of the bottom of the lower pressure plate (9), and a telescopic ring (904) is slidably connected inside the bottom ring (903). A threaded block (905) is installed on the outer wall of the telescopic ring (904), and the threaded block (905) is threadedly connected to the outer wall of the threaded rod (906). The threaded rod (906) is rotatably connected to the inner wall of the bottom ring (903). A toggle disk (907) is installed on the outer wall of the bottom of the threaded rod (906), and the toggle disk (907) is located on the inner wall of the bottom ring (903).

9. A special machine tool for chuck and claw tooth arc milling according to claim 1, characterized in that: The pressure sensor is embedded in a positioning column (301) arranged on the top of the sliding plate (3).

10. A special machine tool for chuck and claw tooth arc milling according to claim 9, characterized in that: The displacement sensor is a grating ruler or a laser displacement sensor, which is fixedly mounted on the inner wall of the sliding plate (3), with the detection end aligned with the driving tooth plate (601).

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