A quick mounting fixture for gear machining and a clamping method thereof

Abstract

The present application relates to gear clamping technology field, specifically disclose a kind of fast fixture for gear machining and clamping method thereof, including bottom plate, further including rotation seat being rotatably installed on bottom plate, the top surface of rotation seat is equipped with annular protrusion capable of positioning the center hole of billet;Sliding cylinder is vertically slidably adjusted and rotated and arranged above rotation seat.The annular protrusion on rotation seat is abutted with locking ring, so that sliding cylinder and rotation seat jointly form axial clamping and positioning to billet, then cooperate with deformation part to internally brace and fix the inner wall of billet center hole, while positioning the center position of billet, the inner wall of billet center hole is fixed with sliding cylinder bottom surface and rotation seat top surface to form airtight space, avoid chip and cooling liquid to enter the inside of fixture, resulting in the positioning accuracy of fixture to billet is reduced, and the structure of fixture itself is closed to reduce device redundancy, improve the compactness of fixture structure.

Description

Technical Field

[0001] This invention relates to the field of gear clamping technology, specifically to a quick-setup fixture for gear machining and its clamping method. Background Technology

[0002] Quick-change gear machining fixtures are tools used to improve the efficiency and precision of gear machining. They enable rapid positioning and clamping of gears, providing high-precision positioning and clamping to ensure the grinding accuracy and surface quality of gears, and are suitable for mass production.

[0003] For example, Chinese Patent CN118492523B discloses a quick-change fixture for gear machining, including a water collection tank. A base plate is fixedly connected to the upper end of the water collection tank. An electric push rod is mounted on the upper end of the base plate. A support plate is fixedly connected to the outer side of the electric push rod on the upper end of the base plate. A loading mechanism is mounted on one side of the support plate above the base plate, and a cutting and inserting mechanism is mounted on one side of the loading mechanism. An unloading mechanism is mounted on the upper end of the base plate. The advantages of this invention are: it can quickly complete the loading and unloading of gears for machining; it can cool the gears being machined; and it can wash away the debris generated during machining, preventing debris from affecting gear machining. Furthermore, the machined gears can be meshed with a gear inspection plate to verify whether the dimensional accuracy and quality of the machined gear meet the requirements.

[0004] While the above method can wash away the chips generated during machining and prevent them from affecting the gear machining process, the coolant carrying the chips may enter the fixture. This could cause the chips to interfere with the fixture's clamping stroke when changing the steel billet to be machined, thus affecting the clamping accuracy. Furthermore, the coolant may also change the friction at the contact point between the steel billet and the fixture, reducing the fixture's clamping effect on the steel billet and consequently reducing the machining accuracy of the gear. Summary of the Invention

[0005] The purpose of this invention is to provide a quick-release fixture for gear machining and its clamping method, so as to solve at least one technical problem existing in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a quick-release fixture for gear machining, comprising a base plate, and further comprising:

[0007] A rotating seat is rotatably mounted on the base plate, and the top surface of the rotating seat is provided with an annular protrusion that can position the center hole of the steel billet;

[0008] A sliding cylinder is located above a rotating base and can be vertically slidably adjusted and rotated. A locking ring is fixed at the bottom of the sliding cylinder, and the outer ring of the locking ring is provided with a deformation part, which is drum-shaped.

[0009] The clamping assembly is installed in the rotating seat and the sliding cylinder, and can control the radial expansion or contraction of the drum belly of the deformation part to internally support and fix the inner wall of the center hole of the steel blank.

[0010] The hobbing part is installed on the bottom plate, and has a hobbing cutter capable of hobbing the steel blank.

[0011] Preferably, the deformation part comprises a plurality of deformation strips fixedly installed on the outer wall of the locking ring in a ring shape, and adjacent deformation strips are connected through elastic layers, and the deformation strips and the outer wall of the locking ring are provided with deformation gaps.

[0012] Preferably, the clamping assembly comprises a plurality of top shafts slidingly installed in the inner hole of the locking ring in a ring shape, and the end of each top shaft is in contact with a corresponding deformation strip, the top surface of the rotating seat is slidingly provided with a plurality of locking blocks in a ring shape, the side wall of the locking block away from the axis of the rotating seat is provided with a protrusion, the center of the top surface of the rotating seat is fixedly provided with a fixed shaft, the locking block and the fixed shaft are provided with a tension spring, the inner side wall of the locking ring is provided with a groove capable of contacting the top shaft through the protrusion of the outer wall of the locking block, the top end of the fixed shaft is slidingly provided with a moving cylinder, and the inner top surface of the moving cylinder and the top surface of the fixed shaft are fixedly connected with a compression spring, and the top surface of the locking block is provided with a chamfer capable of inserting and extruding the locking block;

[0013] The clamping assembly further comprises a driving structure capable of vertically pressing the moving cylinder.

[0014] Preferably, the driving structure comprises a top plate fixed on the bottom plate through support legs, the top plate is provided with a three-dimensional moving platform capable of moving and adjusting in a three-dimensional space, the top part of the sliding cylinder is provided with a through hole, the through hole of the sliding cylinder is slidingly provided with a lifting shaft through a flat key, the lifting shaft is installed at the bottom of the three-dimensional moving platform and is driven to rotate by an external driving device, the bottom end of the lifting shaft is provided with a truncated cone with an inverted isosceles trapezoidal cross section, the outer wall of the lifting shaft in the sliding cylinder is slidingly provided with a sliding limiting block opposite to the inclined surface of the bottom end of the lifting shaft, the sliding cylinder is slidingly provided with a sliding pin capable of being embedded between the sliding limiting block and the truncated cone, and the sliding pin and the inner wall of the sliding cylinder are provided with a spring.

[0015] Preferably, the inner part of the locking ring is hollow, and a gas bag is installed in the hollow part and sleeved on the top shaft, the gas bag is in one-way communication with the sliding slot through a one-way gas pipe, and the outer wall of the gas bag is provided with a gas leakage hole.

[0016] Preferably, the bottom plate top surface is fixedly provided with a fixed ring, the center of the fixed ring is rotatably provided with a rotating shaft, the outer wall of the rotating shaft is fixedly provided with a rotating ring which is sleeved with the fixed ring, the rotating seat is provided with a plurality of rotating rings which are annularly distributed on the top surface of the rotating ring, the outer wall of the rotating shaft is fixedly provided with a rotating block, the outer wall of the rotating block is composed of a plurality of arc surfaces and planes which are alternately arranged, the outer wall of the rotating block is provided with a straight slot, the inner top surface of the fixed ring is rotatably provided with a rotating plate, the outer wall of the rotating plate is composed of a circular surface and a notch, the circular surface of the outer wall of the rotating plate can rotate into or out of the arc surface of the outer wall of the rotating block, the bottom surface of the notch position of the rotating plate is fixedly provided with a push pin through a connecting rod, and the push pin can rotate into or out of the straight slot of the outer wall of the rotating block.

[0017] Preferably, the outer wall of the rotating shaft is fixedly provided with a separation block which can separate the plurality of rotating seats, and the inner top surface of the top plate is fixedly provided with a discharging cylinder.

[0018] Preferably, the top surface of the rotating ring is a circular table with a high center and a low periphery.

[0019] Preferably, the rotating ring is in rolling contact with the fixed ring through balls.

[0020] A method for using a quick-mounting clamp for gear machining, comprising the following steps:

[0021] Step one: when the device is used, first, the billet is placed on the top surface of the rotating seat and the annular protrusion on the top surface of the rotating seat is embedded in the center hole of the billet to preliminarily position the billet, and then the three-dimensional moving platform drives the sliding cylinder to descend to the state that the bottom surface of the sliding cylinder is attached to the top surface of the billet;

[0022] Step two: at this time, the locking ring is completely embedded in the center hole of the billet, and because the lifting shaft pushes the moving cylinder to descend when it is descending, the bottom end of the moving cylinder extrudes the locking block outward along the chamfer on the top surface of the locking block when it is in contact with the bottom surface of the locking block, until the protrusion on the outer wall of the locking block is embedded in the groove on the inner wall of the locking ring;

[0023] Step three: at this time, the locking block pushes the top shaft to do centrifugal motion, and pushes the deformation strip to expand outward to deform and internally support and fix the inner wall of the center hole of the billet, and at the same time, the sliding pin is embedded between the sliding limiting block and the bottom end of the lifting shaft under the action of the spring, the locking of the lifting shaft and the moving cylinder is completed, and the purpose of sealing and clamping the billet is achieved;

[0024] Step four: then, the hobbing cutter in the hobbing part is used to hob the billet, and the external driving structure is used to drive the lifting shaft to drive the billet and the rotating seat to cooperate with the hobbing cutter to rotate synchronously, and at the same time, the liquid injection pipe is used to spray cooling liquid to the contact position between the billet and the hobbing cutter and the outer wall, so as to cool the billet and the hobbing cutter and wash away the debris;

[0025] Step five: after the gear hobbing of the steel billet is completed, the lifting shaft is driven to descend by the three-dimensional moving platform, and the sliding limit block is matched to push the sliding pin back to release the locking of the lifting shaft and the moving cylinder, so that the sliding cylinder and the rotating seat are separated by a sufficient distance;

[0026] Step six: after the steel billet is replaced, steps one to five are repeated.

[0027] Compared with the prior art, the beneficial effects of the present application are as follows:

[0028] Firstly, the annular protrusion on the rotating seat is in abutment with the locking ring, so that the sliding cylinder and the rotating seat jointly form axial clamping and positioning of the steel billet, and the deformed part is matched to internally support and fix the inner wall of the center hole of the steel billet, so that the inner wall of the center hole of the steel billet, the bottom surface of the sliding cylinder and the top surface of the rotating seat are fixed to form a closed space, so as to avoid the entry of chips and cooling liquid into the inside of the clamp, thereby reducing the positioning accuracy of the clamp on the steel billet, and the closed structure realized by the clamp itself can reduce the redundancy of the device and improve the compactness of the clamp.

[0029] Secondly, the position of the moving cylinder is adjusted through the cooperation between the driving structure and the compression spring, so that the locking block is driven to move centrifugally or centripetally, the locking ring and the sliding cylinder are locked or unlocked, the center positioning of the steel billet is completed by the deformed strip being expanded radially along the drum abdomen by the top shaft, and after the deformed strip is extruded to the maximum deformation degree by the top shaft, the extrusion of the inner wall of the center hole of the steel billet by the top shaft is changed from elastic extrusion to rigid extrusion, thereby improving the stability of the steel billet when the steel billet is subjected to the machining pressure of the gear hobbing cutter.

[0030] Thirdly, the deformed strip is prevented from rebounding by the air bag, so that the steel billet after machining is pulled up together with the sliding cylinder by the three-dimensional moving platform, and the steel billet and the sliding cylinder are separated after moving away from the cooling liquid and the chips during the transportation of the steel billet to a suitable position, so that the bottom end of the sliding cylinder, the locking ring and the outer wall of the deformed strip are not contaminated by the cooling liquid and the cutting during the replacement of the steel billet, the contact surface between the clamp and the steel billet is always kept dry and clean, and the clamping effect and positioning accuracy of the clamp on the steel billet are improved. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a schematic diagram of the three-dimensional structure of the present application;

[0032] Figure 2 is a side view of the present application;

[0033] Figure 3 is an isometric view of the present application; Figure 3

[0034] Figure 4 is a sectional view of the clamping assembly in the present application; ​

[0035] Figure 5 Figure 1 is a schematic view of the embodiment of the present application; Figure 4 Figure 2 is an axial sectional view of the embodiment of the present application;

[0036] Figure 6 Figure 3 is a partial sectional view of the clamping assembly in the embodiment of the present application;

[0037] Figure 7 Figure 4 is a perspective view of the rotating block in the embodiment of the present application.

[0038] In the figure: 1, bottom plate; 2, hobbing part; 3, top plate; 4, fixing ring; 5, rotating ring; 6, blanking cylinder; 7, three-dimensional moving platform; 8, hobbing cutter; 9, rotating seat; 10, sliding cylinder; 11, billet; 12, rotating block; 13, rotating plate; 14, rotating shaft; 15, partition block; 16, lifting shaft; 17, sliding limiting block; 18, sliding pin; 19, deformation strip; 20, top shaft; 21, locking block; 22, locking ring; 23, one-way gas conveying pipe; 24, moving cylinder; 25, compression spring; 26, fixed shaft; 27, air bag; 28, ball. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0040] Please refer to Figures 1 to 7 The present application provides a technical solution: a fast clamping jig for gear machining, comprising a bottom plate 1, further comprising:

[0041] A rotating seat 9 is rotatably installed on the bottom plate 1, and the top surface of the rotating seat 9 is provided with an annular protrusion capable of positioning the center hole of the billet 11;

[0042] A sliding cylinder 10 is vertically slidably adjusted and rotated above the rotating seat 9, and the bottom of the sliding cylinder 10 is fixed with a locking ring 22, and the outer ring of the locking ring 22 is provided with a deformation part, which is drum-shaped;

[0043] A clamping assembly is installed inside the rotating seat 9 and the sliding cylinder 10, and the clamping assembly can control the drum abdomen of the deformation part to expand or shrink in the radial direction to internally support and fix the inner wall of the center hole of the billet 11;

[0044] A hobbing part 2 is installed on the bottom plate 1, and the hobbing part 2 is provided with a hobbing cutter 8 capable of hobbing the billet 11.

[0045] In use, first, the billet 11 is placed on the top surface of the rotating seat 9, and the annular protrusion on the top surface of the rotating seat 9 is embedded into the central hole of the billet 11 to preliminarily position the billet 11, then the sliding cylinder 10 is adjusted to be lowered to the bottom surface of the sliding cylinder 10 to be in close contact with the top surface of the billet 11, that is, the bottom end of the locking ring 22 is in abutment with the top end of the annular protrusion, then the deformation part is controlled by the clamping assembly to expand radially to be in abutment with the inner wall of the central hole of the billet 11, and the billet 11 is fixed by being internally supported, after the clamping and positioning of the billet 11 are completed, the outer wall of the billet 11 is rolled by the gear hobbing part 2, at the same time, the contact part between the gear hobbing part 2 and the billet 11 is cooled by the external cooling assembly, and the cutting scraps are washed away, so as to avoid the influence of the cutting scraps on the machining of the gear, after the machining of the billet 11 is completed, the sliding cylinder 10 is driven to be raised to a suitable height, and the billet 11 is replaced, and the above steps can be repeated to quickly change and clamp the gear.

[0046] In this way, the annular protrusion on the rotating seat 9 is in abutment with the locking ring 22, the sliding cylinder 10 and the rotating seat 9 jointly form axial clamping and positioning of the billet 11, and the deformation part internally supports and fixes the inner wall of the central hole of the billet 11, so that the inner wall of the central hole of the billet 11 and the bottom surface of the sliding cylinder 10 and the top surface of the rotating seat 9 are fixed to form a closed space, the cutting scraps and the cooling liquid are prevented from entering the inside of the clamp, the positioning accuracy of the clamp for the billet 11 is improved, and the structure compactness of the clamp is improved.

[0047] Further, the deformation part includes a plurality of deformation strips 19 fixedly installed in an annular distribution on the outer wall of the locking ring 22, and the adjacent deformation strips 19 are connected through an elastic layer, and the deformation strips 19 and the outer wall of the locking ring 22 are provided with a deformation gap.

[0048] According to the above embodiment, a specific embodiment of the deformation part is provided, and the specific reference is made to Figure 4 When the deformation strips 19 are controlled by the clamping assembly to expand along the radial direction of the bulge, the inner wall of the central hole of the billet 11 can be elastically extruded through the elastic layer, the billet 11 is positioned at the center, and the friction between the deformation part and the billet 11 is increased, so that the billet 11 is driven to rotate together with the sliding cylinder 10, so as to achieve the purpose of cooperating with the gear hobbing cutter 8 to machine the billet 11.

[0049] Further, the clamping assembly comprises a plurality of top shafts 20 arranged in a ring shape and slidingly installed in the inner hole of the locking ring 22, and the end of each top shaft 20 is in contact with the corresponding deformation strip 19. A plurality of locking blocks 21 arranged in a ring shape are slidingly installed on the top surface of the rotating seat 9, and the side wall of the locking block 21 away from the axis of the rotating seat 9 is provided with a protrusion. A fixed shaft 26 is fixedly installed at the center of the top surface of the rotating seat 9, and a tension spring is arranged between the locking block 21 and the fixed shaft 26. The inner side wall of the locking ring 22 is provided with a groove capable of allowing the protrusion of the outer wall of the locking block 21 to be in contact with the top shaft 20. A moving cylinder 24 is slidingly installed on the top end of the fixed shaft 26, and a compression spring 25 is fixedly connected between the inner top surface of the moving cylinder 24 and the top surface of the fixed shaft 26. The top surface of the locking block 21 is provided with a chamfer capable of allowing the locking block 21 to be inserted and extruded.

[0050] The clamping assembly further comprises a driving structure capable of vertically pressing the moving cylinder 24.

[0051] According to the above-mentioned embodiment, a specific embodiment of the clamping assembly is provided, and specific reference is made to Figure 4 When the driving structure drives the moving cylinder 24 to press downward along the fixed shaft 26 against the resistance of the compression spring 25, since the top surface of the locking block 21 is provided with a chamfer capable of allowing the locking block 21 to be inserted and extruded, at this time, the locking block 21 will do centrifugal motion with the fixed shaft 26 as the center under the pressure of the bottom end of the moving cylinder 24, until the protrusion of the outer wall of the locking block 21 is embedded in the groove of the inner side wall of the locking ring 22, and the mutual locking between the sliding cylinder 10 and the rotating seat 9 is completed. At the same time, the locking block 21 will push the top shaft 20 to do centrifugal motion, thereby pushing the deformation strip 19 to expand radially along the drum abdomen, and the driving of the deformation part by the above-mentioned clamping assembly is completed. When the moving cylinder 24 rises under the action of the compression spring 25, the locking block 21 moves centripetally under the action of the tension spring, and the locking of the locking ring 22 and the sliding cylinder 10 is released. The deformation strip 19 slowly restores to the original state and pushes the top shaft 20 to complete the reset, so that the positioning and clamping of the billet 11 can be released.

[0052] In this way, through the cooperation between the driving structure and the compression spring 25, the position of the moving cylinder 24 can be adjusted to drive the locking block 21 to do centrifugal or centripetal motion, complete the locking or unlocking of the locking ring 22 and the sliding cylinder 10, and drive the top shaft 20 to push the deformation strip 19 to expand radially along the drum abdomen to complete the center positioning of the billet 11. After the deformation strip 19 is extruded to the maximum deformation degree by the top shaft 20, the extrusion of the top shaft 20 to the inner wall of the center hole of the billet 11 changes from elastic extrusion to rigid extrusion, which improves the stability of the billet 11 when it is subjected to the machining pressure of the gear hob 8.

[0053] It is worth mentioning that, due to the reformed strip 19 and the elastic layer and the top surface of the annular protrusion form a closed structure again, so that the cooling liquid and the chips even into the reformed strip 19 and the inner wall between the center hole of the billet 11 still can not affect the structure within the locking ring 22, further improve the clamping accuracy of the billet 11.

[0054] Further, the driving structure comprises a top plate 3 fixed on the base plate 1 by support legs, a three-dimensional moving platform 7 capable of moving and adjusting in three-dimensional space is installed on the top plate 3, a through hole is formed in the top of the sliding cylinder 10, a lifting shaft 16 is slidingly installed in the through hole of the sliding cylinder 10 by means of a key, the lifting shaft 16 is installed at the bottom of the three-dimensional moving platform 7 and is driven to rotate by an external drive, the bottom end of the lifting shaft 16 is provided as a truncated isosceles trapezoidal circular truncated cone, a sliding limiting block 17 opposite to the slope at the bottom end of the lifting shaft 16 is slidingly installed on the outer wall of the lifting shaft 16 located in the sliding cylinder 10, a sliding pin 18 capable of being embedded between the sliding limiting block 17 and the circular truncated cone is slidingly installed in the sliding cylinder 10, and a spring is arranged between the sliding pin 18 and the inner wall of the sliding cylinder 10.

[0055] According to the above-mentioned embodiment, a specific embodiment of the driving structure is provided, and specific reference is made to Figure 2 When the three-dimensional moving platform 7 drives the lifting shaft 16 to descend, the lifting shaft 16 is relatively stationary with the sliding cylinder 10 due to the blocking of the sliding pin 18, until the bottom surface of the sliding cylinder 10 is attached to the top surface of the billet 11, at which time the lifting shaft 16 continues to descend, pushing the sliding pin 18 back and driving the moving cylinder 24 to descend, so that the locking block 21 moves in a centrifugal manner and is locked with the locking ring 22, at which time the sliding pin 18 is embedded between the sliding limiting block 17 and the circular truncated cone at the bottom end of the lifting shaft 16, and the locking of the lifting shaft 16 is completed. At this time, the sliding cylinder 10 and the rotating seat 9 are locked with each other through the multiple locking structures to ensure the stability of the billet 11 during machining, and the lifting shaft 16 is driven to rotate by the motor to drive the billet 11 and the rotating seat 9 to rotate together with the gear hobbing cutter 8. When the lifting shaft 16 continues to descend, the sliding limiting block 17 pushes the sliding pin 18 back, and when the sliding limiting block 17 moves to below the sliding pin 18, the three-dimensional moving platform 7 stops driving the lifting shaft 16 to descend, so that the lifting shaft 16 and the moving cylinder 24 rise under the action of the compression spring 25. At this time, the sliding limiting block 17 is closely attached to the bottom end of the circular truncated cone of the lifting shaft 16 under the action of the sliding pin 18, so that the circular truncated cone can rise together with the sliding limiting block 17. Since the locking block 21 has not completely separated from the locking ring 22 at this time, the sliding cylinder 10 cannot rise. When the three-dimensional moving platform 7 drives the lifting shaft 16 to rise, the lifting shaft 16 relatively slides with the sliding cylinder 10 for a distance, and then the locking block 21 separates from the locking ring 22, so that the lifting shaft 16 can drive the sliding cylinder 10 to rise together, and the unlocking of the billet 11 is completed.

[0056] In this way, the locking between the sliding cylinder 10 and the rotating seat 9 is completed by lowering the lifting shaft 16 driven by the three-dimensional moving platform 7, and then the locking between the sliding cylinder 10 and the rotating seat 9 is released by continuing to lower and then rising, and the sliding cylinder 10 is lifted to an appropriate height after the machining is completed, so that the contact between the inside of the clamp and the outside is avoided to the greatest extent, thereby avoiding the influence of the cooling liquid and the chips on the travel and positioning accuracy of the clamp.

[0057] Further, the locking ring 22 is internally provided with an opening, and a gas bag 27 is arranged in the opening and sleeved on the top shaft 20. The gas bag 27 is in one-way communication with the sliding groove in which the sliding pin 18 is arranged through a one-way gas pipe 23, and the outer wall of the gas bag 27 is provided with a gas leakage hole.

[0058] According to the above embodiment, when the sliding pin 18 is inwardly retracted to release the locking of the lifting shaft 16, the gas pressure in the sliding groove in which the sliding pin 18 is arranged is increased, and flows to the gas bag 27 through the one-way gas pipe 23. After the gas bag 27 is inflated, the friction between the gas bag 27 and the top shaft 20 is increased. For details, see Figure 4 When the lifting shaft 16 pulls the sliding cylinder 10 to rise together, that is, the locking block 21 has completely separated from the locking ring 22, due to the fact that the inner ring of the gas bag 27 is provided with a friction pattern, the rebound speed of the deformation strip 19 is greatly reduced, so that the deformation strip 19 and the billet 11 still have a certain friction force. At this time, the sliding cylinder 10 and the machined billet 11 can be pulled together to the above of the conveying belt on the side of the device by the three-dimensional moving platform 7. When the gas in the gas bag 27 dissipates to the extent that the rebound of the deformation strip 19 cannot be prevented, the machined billet 11 is separated to the conveying belt, and the machined billet 11 is conveyed to further processing.

[0059] In this way, the rebound of the deformation strip 19 is prevented by the gas bag 27, so that the machined billet 11 and the sliding cylinder 10 can be pulled together to rise and move by the three-dimensional moving platform 7. The machined billet 11 and the sliding cylinder 10 are separated after moving away from the cooling liquid and the chips during the conveying of the machined billet 11 to an appropriate position, so that the bottom end of the sliding cylinder 10 and the outer wall of the locking ring 22 and the deformation strip 19 are not contaminated by the cooling liquid and the chips when the billet 11 is replaced. The contact surface between the clamp and the billet 11 is always dry and clean, so as to improve the clamping effect and positioning accuracy of the clamp on the billet 11. Meanwhile, the machined gear can be quickly taken off from the clamp and enter the next process.

[0060] Further, the top surface of the bottom plate 1 is fixedly provided with a fixed ring 4, the center of the fixed ring 4 is rotatably provided with a rotating shaft 14, the outer wall of the rotating shaft 14 is fixedly provided with a rotating ring 5 which is sleeved with the fixed ring 4, a plurality of rotating seats 9 are arranged on the top surface of the rotating ring 5 in a ring shape, the outer wall of the rotating shaft 14 is fixedly provided with a rotating block 12, the outer wall of the rotating block 12 is alternately composed of a plurality of arc surfaces and flat surfaces, a straight slot is formed in the flat surface of the rotating block 12, the inner top surface of the fixed ring 4 is fixedly provided with a rotating plate 13 which can rotate, the outer wall of the rotating plate 13 is composed of a circular surface and a notch, the circular surface of the rotating plate 13 can rotate into or out of the arc surface of the rotating block 12, and the bottom surface of the notch of the rotating plate 13 is fixedly provided with a push pin through a connecting rod, the push pin can rotate into or out of the straight slot of the rotating block 12.

[0061] According to the above embodiment, referring to Figure 2 and Figure 7 When the external structure such as the motor drives the circular surface of the rotating plate 13 to be embedded in the arc surface of the rotating block 12, the rotating plate 13 will not rotate with the rotating block 12, and when the bottom surface of the rotating plate 13 is fixedly provided with the push pin through the connecting rod and rotates into the straight slot formed in the flat surface of the rotating block 12, the rotating plate 13 drives the rotating block 12 to rotate to the position where the push pin rotates out of the rotating block 12, so as to achieve the purpose of driving the rotating ring 5 to rotate intermittently, and through the arrangement of a plurality of rotating seats 9 and billets 11 on the top surface of the rotating ring 5, when the three-dimensional moving platform 7 pulls the billet 11 after processing and moves upward together with the sliding cylinder 10, the billet 11 can be replaced through the intermittent rotation of the rotating ring 5, the rapid replacement of the billet 11 is completed, and the running speed of the device is improved.

[0062] Further, the outer wall of the rotating shaft 14 is fixedly provided with a separation block 15 which can separate a plurality of rotating seats 9, and the inner wall of the top plate 3 is fixedly provided with a discharging cylinder 6, and the side wall of the discharging cylinder 6 is provided with a cutting groove which can rotate the separation block 15.

[0063] According to the above embodiment, when the hobbing cutter 8 processes the billet 11, the cooling liquid and the cutting will be splashed around under the influence of rotation or other stress, and the separation block 15 which can separate a plurality of rotating seats 9 is fixedly arranged on the outer wall of the rotating shaft 14 (a baffle can also be additionally arranged around the separation block 15), so as to avoid the cooling liquid or the cutting entering other billets 11 and the rotating seats 9 on the top surface of the rotating ring 5, and affecting the subsequent internal support or locking.

[0064] Further, the top surface of the rotating ring 5 is a circular table with a high center and a bottom periphery.

[0065] By setting the top surface of the rotating ring 5 as a center high four bottom circular truncated cone, the cooling liquid can flow out along the top surface of the rotating ring 5 after the cutting chips are wrapped and fall on the top surface of the rotating ring 5, avoiding the accumulation of excessive cutting chips on the surface of the rotating ring 5 from affecting the rotation or positioning accuracy of the rotating seat 9.

[0066] Further, the rotating ring 5 is in rolling contact with the fixed ring 4 through the rolling balls 28.

[0067] By setting the rolling balls 28 between the rotating ring 5 and the fixed ring 4, the rotating ring 5 can always maintain a stable state when subjected to the pressure of the gear hobbing cutter 8, thereby providing stable support for the rotating seat 9 and the steel blank 11 on the basis of reducing the friction between the rotating ring 5 and the fixed ring 4.

[0068] A method for using a quick-mounting clamp for gear machining, comprising the following steps:

[0069] Step one: when the device is used, first place the steel blank 11 on the top surface of the rotating seat 9 and embed the annular protrusion on the top surface of the rotating seat 9 into the center hole of the steel blank 11 to preliminarily position the steel blank 11, and then drive the sliding cylinder 10 to descend to the top surface of the steel blank 11 through the three-dimensional moving platform 7;

[0070] Step two: at this time, the locking ring 22 is completely embedded in the center hole of the steel blank 11, and since the lifting shaft 16 pushes the moving cylinder 24 to descend when descending, the bottom end of the moving cylinder 24 extrudes the locking block 21 outward along the chamfer on the top surface of the locking block 21 when contacting the bottom surface of the locking block 21, until the protrusions on the outer wall of the locking block 21 are embedded in the grooves on the inner wall of the locking ring 22;

[0071] Step three: at this time, the locking block 21 pushes the top shaft 20 to do centrifugal motion, and pushes the deformed strip 19 to expand outward to fix the inner wall of the center hole of the steel blank 11, while the sliding pin 18 is embedded between the sliding limiting block 17 and the bottom end of the lifting shaft 16 under the action of the spring, completing the locking of the lifting shaft 16 and the moving cylinder 24, so as to achieve the purpose of sealing and clamping the steel blank 11;

[0072] Step four: then, the gear hobbing cutter 8 in the gear hobbing part 2 is used to hob the steel blank 11, and the lifting shaft 16 is driven by the external driving structure to drive the steel blank 11 to rotate synchronously with the rotating seat 9 cooperating with the gear hobbing cutter 8, while the cooling liquid is sprayed on the contact and outer wall of the steel blank 11 and the gear hobbing cutter 8 through the liquid spraying pipe, so as to cool the steel blank 11 and the gear hobbing cutter 8 and wash away the cutting chips at the same time;

[0073] Step five: after completing the hobbing of the steel blank 11, the lifting shaft 16 is lowered by the three-dimensional moving platform 7, and the sliding pin 18 is pushed back to release the locking of the lifting shaft 16 and the moving cylinder 24 by cooperating with the sliding limiting block 17, so that the sliding cylinder 10 and the rotating seat 9 are separated by a sufficient distance;

[0074] Step six: repeat the above steps one to five after replacing the billet 11.

[0075] The standard parts used in the embodiment can be directly purchased from the market, and the non-standard structural parts according to the description and drawings can also be directly processed according to the existing technical knowledge without doubt, and the connection mode of each part adopts the mature conventional means in the existing technology, and the machinery, parts and equipment all adopt the conventional models in the existing technology, so specific description is not made here.

[0076] Although the embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made thereto without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A quick-mounting fixture for gear machining comprising a base plate (1), characterized in that, Also include: Rotary seat (9) is rotatably mounted on the base plate (1), the top surface of the rotary seat (9) is provided with annular protrusion which can position the center hole of the billet (11); The sliding cylinder (10) is vertically slidably adjusted and rotated above the rotary seat (9), the bottom of the sliding cylinder (10) is fixed with a locking ring (22), the outer ring of the locking ring (22) is provided with a deformation part, and the deformation part is drum-shaped; The clamping assembly is mounted in the rotary seat (9) and the sliding cylinder (10), the clamping assembly can control the radial expansion or contraction of the drum-shaped deformation part to internally support and fix the inner wall of the center hole of the billet (11); The hobbing part (2) is mounted on the base plate (1), the hobbing part (2) has a hobbing cutter (8) which can hob the billet (11); The deformation part comprises a plurality of annularly distributed deformation strips (19) fixedly mounted on the outer wall of the locking ring (22), and adjacent deformation strips (19) are connected by elastic layers, and the deformation gap is provided between the deformation strip (19) and the outer wall of the locking ring (22); The clamping assembly comprises a plurality of top shafts (20) which are annularly distributed and slidably mounted in the inner hole of the locking ring (22), and the end of each top shaft (20) is in contact with the corresponding deformation strip (19), the top surface of the rotary seat (9) is slidably mounted with a plurality of annularly distributed locking blocks (21), the side wall of the locking block (21) away from the axis of the rotary seat (9) is provided with a protrusion, the center position of the top surface of the rotary seat (9) is fixedly mounted with a fixed shaft (26), the locking block (21) and the fixed shaft (26) are provided with a tension spring, the inner side wall of the locking ring (22) is provided with a groove which can make the outer wall protrusion of the locking block (21) contact with the top shaft (20), the top end outer wall of the fixed shaft (26) is slidably mounted with a moving cylinder (24), and the inner top surface of the moving cylinder (24) and the top surface of the fixed shaft (26) are fixedly connected with a compression spring (25), and the top surface of the locking block (21) is provided with a chamfer which can make the locking block (21) insert and extrude the locking block (21); The clamping assembly further comprises a driving structure which can vertically press the moving cylinder (24).

2. The quick mounting fixture for gear machining according to claim 1, characterized in that: The driving structure comprises a top plate (3) fixed on the base plate (1) by support legs, a three-dimensional moving platform (7) mounted on the top plate (3) which can move and adjust in three-dimensional space, a through hole is formed in the top of the sliding cylinder (10), a lifting shaft (16) is slidably mounted in the through hole of the sliding cylinder (10) by means of a flat key, the lifting shaft (16) is mounted at the bottom of the three-dimensional moving platform (7) and is driven to rotate by an external driving mechanism, the bottom end of the lifting shaft (16) is provided with a circular truncated cone with an inverted isosceles trapezoidal cross section, a sliding limiting block (17) which is opposite to the slope of the bottom end of the lifting shaft (16) is slidably mounted on the outer wall of the lifting shaft (16) located in the sliding cylinder (10), a sliding pin (18) which can be embedded between the sliding limiting block (17) and the circular truncated cone is slidably mounted in the sliding cylinder (10), and a spring is arranged between the sliding pin (18) and the inner wall of the sliding cylinder (10).

3. The quick mounting fixture for gear machining according to claim 2, characterized in that: The locking ring (22) is hollow inside, and a gas bag (27) is arranged in the hollow and sleeved on the top shaft (20), the gas bag (27) is in one-way communication with the sliding groove through a one-way gas pipe (23), and the outer wall of the gas bag (27) is provided with a gas leakage hole.

4. The quick mounting fixture for gear machining according to claim 2, characterized in that: The top surface of the bottom plate (1) is fixedly provided with a fixed ring (4), the center of the fixed ring (4) is rotatably provided with a rotating shaft (14), the outer wall of the rotating shaft (14) is fixedly provided with a rotating ring (5) which is sleeved with the fixed ring (4), a plurality of rotating seats (9) are arranged on the top surface of the rotating ring (5) in a ring shape, the outer wall of the rotating shaft (14) is fixedly provided with a rotating block (12), the outer wall of the rotating block (12) is alternately composed of a plurality of arc surfaces and planes, a straight slot is formed in the plane of the outer wall of the rotating block (12), the inner top surface of the fixed ring (4) is fixedly provided with a rotatable rotating plate (13), the outer wall of the rotating plate (13) is composed of a circular surface and a notch, and the circular surface of the outer wall of the rotating plate (13) can be rotated into or out of the arc surface of the outer wall of the rotating block (12), and the bottom surface of the notch position of the rotating plate (13) is fixedly provided with a push pin through a connecting rod, and the push pin can be rotated into or out of the straight slot formed in the outer wall of the rotating block (12).

5. The quick mounting fixture for gear machining according to claim 4, characterized in that: The outer wall of the rotating shaft (14) is fixedly provided with a separation block (15) which can separate the plurality of rotating seats (9), and the inner side wall of the bottom plate (1) is fixedly provided with a discharging cylinder (6), and the side wall of the discharging cylinder (6) is provided with a cutting groove which can rotate the separation block (15).

6. The quick mounting fixture for gear machining according to claim 4, characterized in that: The top surface of the rotating ring (5) is a circular truncated cone with a high center and a low periphery.

7. The quick mounting fixture for gear machining according to claim 4, characterized in that: The rotating ring (5) is in rolling contact with the fixed ring (4) through the ball (28).

8. A method of using the quick-change jig for gear machining according to any one of claims 2 to 7, characterized by, The method comprises the following steps: Step one: first, the billet (11) is placed on the top surface of the rotating seat (9), and the ring-shaped protrusion on the top surface of the rotating seat (9) is embedded into the center hole of the billet (11) to preliminarily position the billet (11), then the three-dimensional moving platform (7) drives the sliding cylinder (10) to descend until the bottom surface of the sliding cylinder (10) is in contact with the top surface of the billet (11); Step two: at this time, the locking ring (22) is completely embedded into the center hole of the billet (11), and since the lifting shaft (16) pushes the moving cylinder (24) to descend when it is descending, the bottom end of the moving cylinder (24) extrudes the locking block (21) outward along the chamfer on the top surface of the locking block (21) when it is in contact with the bottom surface of the locking block (21), until the protrusion on the outer wall of the locking block (21) is embedded into the groove on the inner side wall of the locking ring (22); Step three: at this time, the locking block (21) pushes the top shaft (20) to do centrifugal motion, and pushes the deformation strip (19) to expand and deform outward to internally support and fix the inner wall of the center hole of the billet (11), and at the same time, the sliding pin (18) is embedded between the sliding limiting block (17) and the bottom end of the lifting shaft (16) under the action of the spring, the locking of the lifting shaft (16) and the moving cylinder (24) is completed, and the purpose of sealing and clamping the billet (11) is achieved. Step four: then the steel billet (11) is hobbed by hobbing cutter (8) in the hobbing part (2), and the lifting shaft (16) is driven by the external driving structure to drive the steel billet (11) to rotate synchronously with the rotating seat (9) cooperating with the hobbing cutter (8), and the contact part of the steel billet (11) and the hobbing cutter (8) and the outer wall are sprayed with cooling liquid, so that the steel billet (11) and the hobbing cutter (8) are cooled and the debris is washed away; Step five: after the hobbing of the steel billet (11) is completed, the lifting shaft (16) is lowered by the three-dimensional moving platform (7), and the sliding pin (18) is pushed back to release the locking of the lifting shaft (16) and the moving cylinder (24) to make the sliding cylinder (10) and the rotating seat (9) fall off enough distance; Step six: after replacing the steel billet (11), the above steps one to five can be repeated.

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