Fast-assembly clamp for gear machining and clamping method of fast-assembly clamp

Abstract

The invention relates to the technical field of gear clamping, in particular to a fast-assembly clamp for gear machining and a clamping method thereof.The fast-assembly clamp for gear machining comprises a bottom plate and further comprises a rotating seat rotationally installed on the bottom plate, and the top face of the rotating seat is provided with an annular protrusion capable of positioning a center hole of a steel billet; and the sliding cylinder is arranged above the rotating seat and can be vertically adjusted in a sliding manner and automatically rotate. The annular protrusion on the rotating seat abuts against the locking ring, so that the sliding barrel and the rotating seat jointly form axial clamping and positioning on a steel billet, the inner wall of a center hole of the steel billet is internally supported and fixed through cooperation with the deformation part, and the center position of the steel billet is positioned while the inner wall of the center hole of the steel billet is fixed. The inner wall of the center hole of the billet, the bottom face of the sliding barrel and the top face of the rotating base are fixed to form a closed space, cuttings and cooling liquid are prevented from entering the clamp, the situation that the billet positioning precision of the clamp is lowered is avoided, device redundancy can be reduced through closing of the structure of the clamp, and the structural compactness of the clamp is improved.

Description

Technical Field

[0001] The invention relates to the technical field of gear clamping, in particular to a quick-clamping fixture for gear processing and a clamping method thereof. Background Art

[0002] The gear processing quick-change fixture is a tool used to improve the efficiency and accuracy of gear processing. It can quickly position and clamp the gears, and provide high-precision positioning and clamping to ensure the grinding accuracy and surface quality of the gears. It is suitable for mass production.

[0003] For example, a Chinese patent with the announcement number CN118492523B discloses a gear processing quick-change fixture, including a water collection trough, the upper end of which is fixedly connected to a base plate, the upper end of which is provided with an electric push rod, the outer side of the electric push rod at the upper end of the base plate is fixedly connected to a support plate, a feeding mechanism is provided on one side of the support plate above the base plate, a cutting and inserting mechanism is provided on one side of the feeding mechanism, and a feeding mechanism is provided on the upper end of the base plate. The advantages of this invention are: it can quickly complete the loading and unloading work of the cutting gear, can cool the processed gear, and can wash away the debris generated during the processing to avoid the debris affecting the processing of the gear. At the same time, the processed gear is meshed by contacting with the tooth inspection plate to verify whether the dimensional accuracy and quality of the processed gear meet the requirements.

[0004] When the gear is processed in the above manner, although the debris generated during processing can be washed away to prevent the debris from affecting the processing of the gear, the coolant carrying the debris may enter the fixture, causing the debris to interfere with the clamping stroke of the fixture when the fixture is replaced with the steel billet to be processed, thereby affecting the clamping accuracy. The coolant may also change the friction force at the contact point between the steel billet and the fixture, reducing the clamping effect of the fixture on the steel billet, thereby reducing the processing accuracy of the gear. Summary of the invention

[0005] The object of the present invention is to provide a quick-release clamp for gear machining and a clamping method thereof, so as to solve at least one technical problem existing in the above-mentioned prior art.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a quick-install fixture for gear processing, comprising a base plate, and further comprising:

[0007] A rotating seat rotatably mounted on the bottom plate, wherein the top surface of the rotating seat is provided with an annular protrusion capable of positioning the center hole of the steel billet;

[0008] A sliding cylinder is arranged above the rotating seat and can slide vertically and rotate. A locking ring is fixed to the bottom of the sliding cylinder. The outer ring of the locking ring is provided with a deformation part, and the deformation part is drum-shaped.

[0009] A clamping assembly installed inside the rotating seat and the sliding cylinder, the clamping assembly can control the bulging belly of the deformation part to expand or contract radially to support and fix the inner wall of the center hole of the steel billet;

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

[0011] Preferably, the deformation portion comprises a plurality of deformation bars which are distributed in an annular shape and fixedly mounted on the outer wall of the locking ring, and adjacent deformation bars are connected by an elastic layer, and a deformation gap is provided between the deformation bars and the outer wall of the locking ring.

[0012] Preferably, the clamping assembly comprises a plurality of top shafts distributed in an annular shape and slidably mounted in the inner hole of the locking ring, and the end of each of the top shafts contacts and abuts against the corresponding deformation strip, a plurality of locking blocks distributed in an annular shape are slidably mounted on the top surface of the rotating seat, a protrusion is provided on the side wall of the locking block away from the axis of the rotating seat, a fixed shaft is fixedly mounted at the center position of the top surface of the rotating seat, a tension spring is provided between the locking block and the fixed shaft, a groove is provided on the inner side wall of the locking ring for the protrusion of the outer wall of the locking block to contact the top shaft, a moving cylinder is slidably mounted on the outer wall of the top end of the fixed shaft, and a compression spring is fixedly connected between the inner top surface of the moving cylinder and the top surface of the fixed shaft, and the top surface of the locking block is provided with a chamfer for the locking block to be inserted and extruded;

[0013] The clamping assembly also includes a driving structure capable of vertically pressing the moving cylinder downward.

[0014] Preferably, the driving structure includes a top plate fixed to the bottom plate by supporting legs, a three-dimensional movable platform which can be moved and adjusted in three-dimensional space is installed on the top plate, a through hole is opened on the top of the sliding cylinder, a lifting shaft is slidably installed in the through hole of the sliding cylinder through a flat key, the lifting shaft is installed at the bottom of the three-dimensional movable platform and is rotated by external drive, the bottom end of the lifting shaft is set as a frustum with an inverted isosceles trapezoidal cross-section, a sliding limit block which is opposite to the inclined surface of the bottom end of the lifting shaft is slidably installed on the outer wall of the lifting shaft located in the sliding cylinder, a sliding pin which can be embedded between the sliding limit block and the frustum is slidably installed in the sliding cylinder, and a spring is provided between the sliding pin and the inner wall of the sliding cylinder.

[0015] Preferably, the locking ring is hollowed out inside, and an airbag sleeved on the top shaft is installed in the hollow part. The airbag is unidirectionally connected to the slide groove where the sliding pin is located through a one-way air supply pipe, and an air leakage hole is opened on the outer wall of the airbag.

[0016] Preferably, a fixing ring is fixedly installed on the top surface of the bottom plate, a rotating shaft is rotatably installed at the center of the fixing ring, a rotating ring which is mutually sleeved with the fixing ring is fixedly installed on the outer wall of the rotating shaft, a plurality of rotating rings are provided on the rotating seat and are distributed in a ring shape on the top surface of the rotating ring, a rotating block is fixedly installed on the outer wall of the rotating shaft, the outer wall of the rotating block is composed of a plurality of arc surfaces and planes alternating in sequence, a straight slot is provided at the plane of the outer wall of the rotating block, a rotatable rotating plate is installed on the inner top surface of the fixing ring, the outer wall of the rotating plate is composed of a circular surface and a notch, and the circular surface of the outer wall of the rotating plate can be rotated into or out of the arc surface of the outer wall of the rotating block, and a pry pin is fixedly installed on the bottom surface of the notch position of the rotating plate through a connecting rod, and the pry pin can be rotated into or out of the straight slot provided on the outer wall of the rotating block.

[0017] Preferably, a partition block capable of separating a plurality of rotating seats is fixedly mounted on the outer wall of the rotating shaft, a lower material barrel is fixedly mounted inside the top plate, and a groove is formed on the side wall of the lower material barrel for the partition block to rotate.

[0018] Preferably, the top surface of the rotating ring is configured as a truncated cone with a central height and four surrounding bottoms.

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

[0020] A method for using a quick-release fixture for gear processing comprises the following steps:

[0021] Step 1: When the device is in use, first place the steel billet on the top surface of the rotating seat and make the annular protrusion on the top surface of the rotating seat embed into the central hole of the steel billet to preliminarily position the steel billet, and then drive the sliding cylinder down through the three-dimensional moving platform until the bottom surface of the sliding cylinder fits with the top surface of the steel billet;

[0022] Step 2: At this time, the locking ring is completely embedded in the center hole of the steel billet. Since the lifting shaft will push the moving cylinder down when it descends, the bottom end of the moving cylinder contacts the bottom surface of the locking block and squeezes the locking block outward along the chamfer of the top 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 3: At this time, the locking block pushes the top shaft to make centrifugal motion, and pushes the deformation strip to expand outward to deform and fix the inner wall of the center hole of the billet. At the same time, the sliding pin is embedded between the sliding limit block and the bottom end of the lifting shaft under the action of the spring, completing the locking of the lifting shaft and the moving cylinder, so as to achieve the purpose of sealing and clamping the billet;

[0024] Step 4: Then, the steel billet is gear hobbed by the gear hobbing cutter in the gear hobbing part, and the lifting shaft is driven by the external driving structure to drive the steel billet and the rotating seat to rotate synchronously with the gear hobbing cutter, and at the same time, the coolant is sprayed on the contact point between the steel billet and the gear hobbing cutter and the outer wall through the spray pipe to cool the steel billet and the gear hobbing cutter while washing away the debris;

[0025] Step 5: After the hobbing of the steel billet is completed, the lifting shaft is driven down by the three-dimensional moving platform and the sliding limit block is used 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 fall off a sufficient distance;

[0026] Step 6: After replacing the steel billet, repeat the above steps 1 to 5.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The present invention utilizes the annular protrusion on the rotating seat to abut against the locking ring, so that the sliding cylinder and the rotating seat jointly form axial clamping and positioning of the steel billet, and then cooperates with the deformation part to internally support and fix the inner wall of the center hole of the steel billet. While positioning the center position of the steel billet, the inner wall of the center hole of the steel billet is fixed to the bottom surface of the sliding cylinder and the top surface of the rotating seat to form a closed space, thereby preventing chips and coolant from entering the interior of the fixture, which would cause a decrease in the positioning accuracy of the fixture for the steel billet. In addition, the closure achieved through the structure of the fixture itself can reduce device redundancy and improve the structural compactness of the fixture.

[0029] 2. The present invention can adjust the position of the movable cylinder through the cooperation between the driving structure and the compression spring, thereby driving the locking block to perform centrifugal or centripetal movement, thereby completing the locking or unlocking of the locking ring and the sliding cylinder, and at the same time driving the top shaft to push the deformation strip to expand radially along the belly of the drum to complete the center positioning of the steel billet, and after the deformation strip is squeezed to the maximum deformation degree by the top shaft, the squeezing of the top shaft on the inner wall of the center hole of the steel billet is transformed from elastic squeezing to rigid squeezing, thereby improving the stability of the steel billet when subjected to the processing pressure of the gear hobbing cutter.

[0030] 3. The present invention uses an air bag to prevent the deformation strip from rebounding, and can pull the processed billet and the sliding cylinder to rise and move together through the three-dimensional mobile platform. In the process of transporting the billet to a suitable position, the billet and the sliding cylinder are kept away from coolant and chips and then separated, ensuring that the bottom end of the sliding cylinder, the locking ring and the outer wall of the deformation strip will not be contaminated by coolant and chips when the billet is replaced, so that the contact surface between the fixture and the billet is always kept dry and clean, so as to improve the clamping effect and positioning accuracy of the fixture on the billet. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0032] Figure 2 It is a side cross-sectional view of the present invention;

[0033] Figure 3 For the present invention Figure 3 Isometric section view of

[0034] Figure 4 is a cross-sectional view of the clamping assembly of the present invention;

[0035] Figure 5 For the present invention Figure 4 Isometric section view of

[0036] Figure 6 It is a partial cross-sectional view of the clamping assembly in the present invention;

[0037] Figure 7 It is a schematic diagram of the three-dimensional structure of the rotating block in the present invention.

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

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] See also Figures 1 to 7 The present invention provides a technical solution: a quick-release fixture for gear processing, comprising a base plate 1, and also comprising:

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

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

[0043] A clamping assembly installed inside the rotating seat 9 and the sliding cylinder 10, the clamping assembly can control the bulging belly of the deformation part to expand or contract radially to support and fix the inner wall of the center hole of the steel billet 11;

[0044] The gear hobbing unit 2 is mounted on the base plate 1 , and the gear hobbing unit 2 includes a gear hobbing cutter 8 that can perform gear hobbing on a steel billet 11 .

[0045] When the device is in use, the steel billet 11 is first 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 in the center hole of the steel billet 11 to perform preliminary positioning of the steel billet 11. Subsequently, the sliding cylinder 10 is lowered by vertical sliding adjustment until the bottom surface of the sliding cylinder 10 is in contact with the top surface of the steel billet 11, even if the bottom end of the locking ring 22 is abutted against the top of the annular protrusion. Subsequently, the clamping assembly controls the bulge of the deformation portion to expand radially until it abuts against the inner wall of the center hole of the steel billet 11. The steel billet 11 is internally supported and fixed. After completing the clamping and positioning of the steel billet 11, the outer wall of the steel billet 11 can be hobbed by the gear hobbing section 2. At the same time, the contact point of the gear hobbing section 2 with the steel billet 11 is cooled by the external cooling assembly, and the debris generated during cutting is flushed clean to avoid the influence of the chips on the processing of the gear. After the processing of the steel billet 11 is completed, the sliding cylinder 10 is driven to rise to an appropriate height and the steel billet 11 is replaced. The gear can be quickly clamped by repeating the above steps.

[0046] In this way, the annular protrusion on the rotating seat 9 is abutted against the locking ring 22, so that the sliding cylinder 10 and the rotating seat 9 jointly form axial clamping and positioning of the steel billet 11, and then cooperate with the deformation part to support and fix the inner wall of the center hole of the steel billet 11. While positioning the center position of the steel billet 11, the inner wall of the center hole of the steel billet 11 is fixed to the bottom surface of the sliding cylinder 10 and the top surface of the rotating seat 9 to form a closed space, which prevents chips and coolant from entering the interior of the clamp, resulting in a decrease in the positioning accuracy of the clamp for the steel billet 11. In addition, the closure achieved through the structure of the clamp itself can reduce device redundancy and improve the structural compactness of the clamp.

[0047] Furthermore, the deformation portion includes a plurality of deformation strips 19 distributed in an annular shape and fixedly mounted on the outer wall of the locking ring 22 , and adjacent deformation strips 19 are connected by an elastic layer, and a deformation gap is provided between the deformation strips 19 and the outer wall of the locking ring 22 .

[0048] According to the above embodiment, a specific embodiment of a deformation part is provided. Figure 4 When the clamping assembly controls the deformation strip 19 to expand radially along the belly of the drum, the inner wall of the center hole of the steel billet 11 can be elastically squeezed through the elastic layer. While centering the steel billet 11, the friction between the deformation portion and the steel billet 11 is increased, thereby utilizing the self-rotation of the sliding cylinder 10 to drive the steel billet 11 to rotate together, so as to achieve the purpose of cooperating with the gear hobbing cutter 8 to process the steel billet 11.

[0049] Furthermore, the clamping assembly includes a plurality of top shafts 20 distributed in an annular shape and slidably mounted in the inner hole of the locking ring 22, and the end of each top shaft 20 contacts and abuts against the corresponding deformation strip 19, and a plurality of locking blocks 21 distributed in an annular shape are slidably mounted on the top surface of the rotating seat 9, and a protrusion is provided on the side wall of the locking block 21 away from the axis of the rotating seat 9, and a fixed shaft 26 is fixedly mounted at the center position of the top surface of the rotating seat 9, and a tension spring is provided between the locking block 21 and the fixed shaft 26, and a groove is provided on the inner side wall of the locking ring 22 for the protrusion of the outer wall of the locking block 21 to contact the top shaft 20, and a moving cylinder 24 is slidably mounted on the outer wall of 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, and a chamfer is provided on the top surface of the locking block 21 for the locking block 21 to be inserted and the locking block 21 to be extruded;

[0050] The clamping assembly also includes a driving structure capable of vertically pressing the moving cylinder 24 downward.

[0051] According to the above embodiment, a specific embodiment of a clamping assembly is provided. Figure 4 When the driving structure drives the moving cylinder 24 to press down along the fixed shaft 26 to overcome the resistance of the compression spring 25, since the top surface of the locking block 21 is provided with a chamfer for the locking block 21 to be inserted and the locking block 21 to be extruded, the locking block 21 will perform centrifugal movement with the fixed shaft 26 as the center under the pressure of the bottom end of the moving cylinder 24 until the protrusion on the outer wall of the locking block 21 is embedded in the groove on the inner wall of the locking ring 22, completing the mutual locking between the sliding cylinder 10 and the rotating seat 9. At the same time, when the locking block 21 slides, it will push the top shaft 20 to perform centrifugal movement together, thereby pushing the deformation strip 19 to expand radially along the belly of the drum, completing the driving of the above-mentioned clamping assembly to the deformation part, and 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, releasing the lock of the locking ring 22 and the sliding cylinder 10, and the deformation strip 19 slowly returns to its original state and pushes the top shaft 20 to complete the reset, and the positioning and clamping of the steel 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 movable cylinder 24 can be adjusted to drive the locking block 21 to perform centrifugal or centripetal movement, thereby completing the locking or unlocking of the locking ring 22 and the sliding cylinder 10, and at the same time driving the top shaft 20 to push the deformation strip 19 to expand radially along the belly of the drum to complete the center positioning of the steel billet 11. After the deformation strip 19 is squeezed to the maximum deformation degree by the top shaft 20, the squeezing of the inner wall of the center hole of the steel billet 11 by the top shaft 20 is transformed from elastic squeezing to rigid squeezing, thereby improving the stability of the steel billet 11 when it is subjected to the processing pressure of the gear hobbing cutter 8.

[0053] It is worth mentioning that due to the closed structure formed by the deformation strip 19, the elastic layer and the top surface of the annular protrusion, even if the coolant and chips enter between the deformation strip 19 and the inner wall of the center hole of the steel billet 11, it will not affect the structure inside the locking ring 22, thereby further improving the clamping accuracy of the steel billet 11.

[0054] Furthermore, the driving structure includes a top plate 3 fixed to the base plate 1 by supporting legs, a three-dimensional movable platform 7 which can be moved and adjusted in three-dimensional space is installed on the top plate 3, a through hole is opened on the top of the sliding cylinder 10, a lifting shaft 16 is slidably installed in the through hole of the sliding cylinder 10 through a flat key, the lifting shaft 16 is installed at the bottom of the three-dimensional movable platform 7, and is rotated by external drive, the bottom end of the lifting shaft 16 is set as a truncated cone with a cross-section of an inverted isosceles trapezoid, a sliding limit block 17 opposite to the inclined surface of the bottom end of the lifting shaft 16 is slidably installed 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 limit block 17 and the truncated cone is slidably installed in the sliding cylinder 10, and a spring is provided between the sliding pin 18 and the inner wall of the sliding cylinder 10.

[0055] According to the above embodiment, a specific embodiment of a driving structure is provided. Figure 2 When the three-dimensional mobile platform 7 drives the lifting shaft 16 to descend, due to the obstruction of the sliding pin 18, the lifting shaft 16 and the sliding cylinder 10 are relatively stationary until the bottom surface of the sliding cylinder 10 is in contact with the top surface of the steel billet 11. At this time, the lifting shaft 16 continues to descend, pushing the sliding pin 18 back and pushing the moving cylinder 24 to descend, so that the locking block 21 moves centrifugally and locks with the locking ring 22. At this time, the sliding pin 18 is embedded between the sliding limit block 17 and the bottom end of the lifting shaft 16 The cone is locked to complete the locking of the lifting shaft 16. At this point, the sliding cylinder 10 and the rotating seat 9 are locked with each other through a multiple locking structure to ensure the stability of the steel billet 11 during processing, and the lifting shaft 16 is driven by a motor to rotate, driving the steel 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 limit block 17 pushes the sliding pin 18 back. After the sliding limit block 17 moves 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 together under the action of the compression spring 25. At this time, the sliding limit block 17 is tightly fitted with the round table at the bottom of the lifting shaft 16 under the action of the sliding pin 18, so that the round table can rise together with the sliding limit block 17. Since the locking block 21 has not completely disengaged from the locking ring 22 at this time, the sliding cylinder 10 still cannot rise. When the three-dimensional moving platform 7 drives the lifting shaft 16 to rise, the lifting shaft 16 and the sliding cylinder 10 slide relative to each other for a distance, and the locking block 21 disengages from the locking ring 22, and the lifting shaft 16 can drive the sliding cylinder 10 to rise together, thereby completing the unlocking of the steel billet 11.

[0056] In this way, the lifting shaft 16 is driven down by the three-dimensional mobile platform 7 to complete the locking between the sliding cylinder 10 and the rotating seat 9, and then continues to descend and then rise to release the locking between the sliding cylinder 10 and the rotating seat 9, and after the processing is completed, the sliding cylinder 10 is lifted to an appropriate height to avoid contact between the inside of the fixture and the outside world to the greatest extent, thereby preventing coolant and chips from entering the inside of the fixture and affecting the stroke and positioning accuracy of the fixture.

[0057] Furthermore, the locking ring 22 is hollowed out inside, and an airbag 27 sleeved on the top shaft 20 is installed in the hollow. The airbag 27 is unidirectionally connected to the slide groove where the sliding pin 18 is located through a one-way air supply pipe 23, and an air leakage hole is opened on the outer wall of the airbag 27.

[0058] According to the above embodiment, when the sliding pin 18 is retracted to release the lock of the lifting shaft 16, the air pressure in the slide groove where the sliding pin 18 is located will increase, and flow to the airbag 27 through the one-way air pipe 23. After the airbag 27 is inflated, the friction between the airbag 27 and the top shaft 20 will increase. Figure 4 When the lifting shaft 16 pulls the sliding cylinder 10 up together, the locking block 21 has completely separated from the locking ring 22. Since the inner ring of the airbag 27 is provided with friction patterns, the rebound speed of the deformation strip 19 is greatly reduced, so that there is still a certain friction between the deformation strip 19 and the steel billet 11. At this time, the sliding cylinder 10 and the processed steel billet 11 can be pulled by the three-dimensional mobile platform 7 to move to the top of the conveyor belt on the side of the device. When the gas in the airbag 27 dissipates to the point where it can no longer prevent the rebound of the deformation strip 19, the steel billet 11 will detach from the conveyor belt by itself, and the processed steel billet 11 will be transported to further processing.

[0059] In this way, the airbag 27 is used to prevent the deformation strip 19 from rebounding, and the three-dimensional mobile platform 7 can be used to pull the processed billet 11 and the sliding cylinder 10 to rise and move together. In the process of transporting the billet 11 to a suitable position, the billet 11 and the sliding cylinder 10 are kept away from coolant and chips and then separated, ensuring that the bottom end of the sliding cylinder 10, the locking ring 22 and the outer wall of the deformation strip 19 will not be contaminated with coolant and chips when the billet 11 is replaced, so that the contact surface between the fixture and the billet 11 is always kept dry and clean, so as to improve the clamping effect and positioning accuracy of the fixture on the billet 11, and at the same time, the processed gear can be quickly removed from the fixture and enter the next process.

[0060] Furthermore, a fixing ring 4 is fixedly installed on the top surface of the bottom plate 1, a rotating shaft 14 is rotatably installed at the center of the fixing ring 4, a rotating ring 5 which is mutually sleeved with the fixing ring 4 is fixedly installed on the outer wall of the rotating shaft 14, a plurality of rotating seats 9 are provided and distributed in a ring shape on the top surface of the rotating ring 5, a rotating block 12 is fixedly installed on the outer wall of the rotating shaft 14, the outer wall of the rotating block 12 is composed of a plurality of arc surfaces and planes alternating in sequence, a straight slot is provided at the plane of the outer wall of the rotating block 12, a rotatable rotating plate 13 is installed on the inner top surface of the fixing ring 4, 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 a push pin is fixedly installed on the bottom surface of the notch position of the rotating plate 13 through a connecting rod, and the push pin can be rotated into or out of the straight slot provided on the outer wall of the rotating block 12.

[0061] According to the above implementation, it can be seen that Figure 2 and Figure 7 When an external structure such as a motor drives the circular surface of the rotating plate 13 to embed into the arc surface of the outer wall of the rotating block 12, the rotating plate 13 will not drive the rotating block 12 to rotate together. As the rotating plate 13 continues to rotate, the bottom surface of the rotating plate 13 is rotated into the straight groove opened on the outer wall plane of the rotating block 12 through the pin fixed by the connecting rod. The rotating plate 13 drives the rotating block 12 to rotate in the gap until the pin rotates out of the rotating block 12, and the purpose of driving the rotating ring 5 to rotate intermittently can be achieved. By arranging multiple groups of rotating seats 9 and steel billets 11 on the top surface of the rotating ring 5, when the three-dimensional moving platform 7 in the above text pulls the processed steel billet 11 and the sliding cylinder 10 to rise and move together, the steel billet 11 can be replaced by intermittently rotating the rotating ring 5, thereby completing the rapid replacement of the steel billet 11 and improving the operating speed of the device.

[0062] Furthermore, a partition block 15 capable of separating the plurality of rotating seats 9 is fixedly mounted on the outer wall of the rotating shaft 14 , a lower material barrel 6 is fixedly mounted in the top plate 3 , and a groove is formed on the side wall of the lower material barrel 6 for the partition block 15 to rotate.

[0063] According to the above embodiment, it can be known that when the gear hobbing cutter 8 processes the steel billet 11, the coolant and cutting chips will splash around due to the influence of rotation or other stresses. By fixing a partition block 15 that can separate multiple rotating seats 9 on the outer wall of the rotating shaft 14 (a baffle can also be added around the partition block 15), coolant or chips can be prevented from entering other steel billets 11 and rotating seats 9 on the top surface of the rotating ring 5, which would affect the subsequent internal support or locking.

[0064] Furthermore, the top surface of the rotating ring 5 is configured as a truncated cone with a central height and four surrounding bottoms.

[0065] By setting the top surface of the rotating ring 5 as a truncated cone with a central height and four surrounding bottoms, the coolant can carry the chips and flow out along the top surface of the rotating ring 5 after falling to the top surface of the rotating ring 5, thereby avoiding excessive chips accumulating on the surface of the rotating ring 5 and affecting the rotation or positioning accuracy of the rotating seat 9.

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

[0067] By arranging the balls 28 between the rotating ring 5 and the fixed ring 4, the rotating ring 5 can always keep a stable state when subjected to the pressure of the gear hobbing cutter 8, thereby providing a stable supporting force for the rotating seat 9 and the steel billet 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-release fixture for gear processing comprises the following steps:

[0069] Step 1: When the device is used, firstly, the steel 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 in the central hole of the steel billet 11 to preliminarily position the steel billet 11, and then the sliding cylinder 10 is driven down by the three-dimensional moving platform 7 until the bottom surface of the sliding cylinder 10 is in contact with the top surface of the steel billet 11;

[0070] Step 2: At this time, the locking ring 22 is completely embedded in the center hole of the steel billet 11. Since the lifting shaft 16 pushes the moving cylinder 24 downward when it descends, the bottom end of the moving cylinder 24 contacts the bottom surface of the locking block 21 and squeezes the locking block 21 outward along the chamfer of the top surface of the locking block 21 until the protrusion on the outer wall of the locking block 21 is embedded in the groove on the inner wall of the locking ring 22.

[0071] Step 3: At this time, the locking block 21 pushes the top shaft 20 to perform centrifugal movement, and pushes the deformation strip 19 to expand and deform outward to support and fix the inner wall of the center hole of the steel billet 11. At the same time, the sliding pin 18 is embedded between the sliding limit 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 billet 11;

[0072] Step 4: Then, the steel billet 11 is gear hobbed by the gear hobbing cutter 8 in the gear hobbing part 2, and the lifting shaft 16 is driven by the external driving structure to drive the steel billet 11 and the rotating seat 9 to rotate synchronously with the gear hobbing cutter 8, and at the same time, the cooling liquid is sprayed on the contact point between the steel billet 11 and the gear hobbing cutter 8 and the outer wall through the liquid spray pipe, so as to cool the steel billet 11 and the gear hobbing cutter 8 and wash away the debris;

[0073] Step 5: After the hobbing of the steel billet 11 is completed, the lifting shaft 16 is driven down by the three-dimensional moving platform 7 and the sliding limit block 17 is used to push the sliding pin 18 back to release the locking of the lifting shaft 16 and the moving cylinder 24, so that the sliding cylinder 10 and the rotating seat 9 fall off a sufficient distance;

[0074] Step 6: After replacing the steel billet 11, repeat the above steps 1 to 5.

[0075] The standard parts used in this embodiment can be purchased directly from the market, and the non-standard structural components recorded in the specification and the drawings can also be directly processed according to the existing technical common sense. At the same time, the connection method of each component adopts the mature conventional means in the prior art, and the machinery, parts and equipment all adopt the conventional models in the prior art, so no specific description will be given here.

[0076] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A quick-release fixture for gear machining, comprising a base plate (1), characterized in that: Also includes: A rotating seat (9) rotatably mounted on the bottom plate (1), wherein the top surface of the rotating seat (9) is provided with an annular protrusion capable of positioning the center hole of the steel billet (11); A sliding cylinder (10) is arranged above the rotating seat (9) and is capable of vertical sliding adjustment and self-rotation. A locking ring (22) is fixed to the bottom of the sliding cylinder (10). The outer ring of the locking ring (22) is provided with a deformation portion, and the deformation portion is drum-shaped. A clamping assembly installed inside the rotating seat (9) and the sliding cylinder (10), wherein the clamping assembly can control the bulging belly of the deformation portion to expand or contract radially so as to internally support and fix the inner wall of the center hole of the steel billet (11); A gear hobbing section (2) is mounted on a base plate (1), wherein the gear hobbing section (2) has a gear hobbing cutter (8) capable of performing gear hobbing processing on a steel billet (11).

2. The quick-release fixture for gear machining according to claim 1, characterized in that: The deformation portion comprises a plurality of deformation strips (19) distributed in an annular shape and fixedly mounted on the outer wall of the locking ring (22), and adjacent deformation strips (19) are connected via an elastic layer, and a deformation gap is provided between the deformation strips (19) and the outer wall of the locking ring (22).

3. The quick-release fixture for gear machining according to claim 2, characterized in that: The clamping assembly comprises a plurality of top shafts (20) distributed in an annular shape and slidably mounted in the inner hole of the locking ring (22), and the end of each top shaft (20) contacts and abuts against the corresponding deformation strip (19), a plurality of locking blocks (21) distributed in an annular shape are slidably mounted on the top surface of the rotating seat (9), a protrusion is provided on the side wall of the locking block (21) away from the axis of the rotating seat (9), a fixed shaft (26) is fixedly mounted at the center position of the top surface of the rotating seat (9), and the locking block ( A tension spring is provided between the locking ring (21) and the fixed shaft (26); a groove is provided on the inner side wall of the locking ring (22) so that the outer wall protrusion of the locking block (21) can contact the top shaft (20); a moving cylinder (24) is slidably mounted on the outer wall of the top end of the fixed shaft (26); 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); and a chamfer is provided on the top surface of the locking block (21) so that the locking block (21) can be inserted and extruded; The clamping assembly also includes a driving structure capable of vertically pressing the moving cylinder (24).

4. The quick-release fixture for gear machining according to claim 2, characterized in that: The driving structure comprises a top plate (3) fixed on a bottom plate (1) by supporting legs, a three-dimensional movable platform (7) capable of moving and adjusting in a three-dimensional space being installed on the top plate (3), a through hole being provided on the top of the sliding cylinder (10), a lifting shaft (16) being slidably installed in the through hole of the sliding cylinder (10) by means of a flat key, the lifting shaft (16) being installed at the bottom of the three-dimensional movable platform (7) and being rotated by an external drive, the bottom end of the lifting shaft (16) being configured as a truncated cone with a cross section of an inverted isosceles trapezoid, a sliding limit block (17) opposite to the inclined surface of the bottom end of the lifting shaft (16) being slidably 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 limit block (17) and the truncated cone being slidably installed in the sliding cylinder (10), a spring being provided between the sliding pin (18) and the inner wall of the sliding cylinder (10).

5. The quick-release fixture for gear machining according to claim 4, characterized in that: The locking ring (22) is hollowed out inside, and an air bag (27) sleeved on the top shaft (20) is installed in the hollowed out part. The air bag (27) is unidirectionally connected to the slide groove where the sliding pin (18) is located through a unidirectional air supply pipe (23), and an air leakage hole is opened on the outer wall of the air bag (27).

6. The quick-release fixture for gear machining according to claim 4, characterized in that: A fixing ring (4) is fixedly mounted on the top surface of the bottom plate (1), a rotating shaft (14) is rotatably mounted at the center of the fixing ring (4), a rotating ring (5) which is sleeved with the fixing ring (4) is fixedly mounted on the outer wall of the rotating shaft (14), a plurality of rotating blocks (12) are arranged on the rotating seat (9) and are distributed in an annular shape on the top surface of the rotating ring (5), the outer wall of the rotating shaft (14) is fixedly mounted, and the outer wall of the rotating block (12) is composed of a plurality of arc surfaces and plane surfaces which are alternately arranged in sequence, A straight notch is provided on the plane of the outer wall of the rotating block (12); a rotating plate (13) capable of rotation is installed on the inner top surface of the fixed ring (4); the outer wall of the rotating plate (13) consists 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); a detent is fixedly installed on the bottom surface of the notch of the rotating plate (13) through a connecting rod, and the detent can be rotated into or out of the straight notch provided on the outer wall of the rotating block (12).

7. The quick-release fixture for gear machining according to claim 6, characterized in that: A partition block (15) capable of separating a plurality of rotating seats (9) is fixedly mounted on the outer wall of the rotating shaft (14), a lower material barrel (6) is fixedly mounted inside the top plate (3), and a groove is provided on the side wall of the lower material barrel (6) for the partition block (15) to rotate.

8. The quick-release fixture for gear machining according to claim 6, characterized in that: The top surface of the rotating ring (5) is configured as a truncated cone with a central height and surrounding bottoms.

9. The quick-release fixture for gear machining according to claim 6, characterized in that: The rotating ring (5) is in rolling contact with the fixed ring (4) via the balls (28).

10. A method for using a quick-release clamp for gear machining according to any one of claims 4 to 9, characterized in that: The steps include: Step 1: First, the steel 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 in the center hole of the steel billet (11) to preliminarily position the steel billet (11), and then the sliding cylinder (10) is driven by the three-dimensional moving platform (7) to descend until the bottom surface of the sliding cylinder (10) is in contact with the top surface of the steel billet (11); Step 2: At this time, the locking ring (22) is completely embedded in the center hole of the steel billet (11). Since the lifting shaft (16) pushes the moving cylinder (24) to descend when it descends, the bottom end of the moving cylinder (24) contacts the bottom surface of the locking block (21) and squeezes the locking block (21) outward along the chamfer of the top surface of the locking block (21) until the protrusion on the outer wall of the locking block (21) is embedded in the groove on the inner wall of the locking ring (22); Step 3: At this time, the locking block (21) pushes the top shaft (20) to perform centrifugal movement, and pushes the deformation strip (19) to expand outward to deform and fix the inner wall of the center hole of the steel billet (11). At the same time, the sliding pin (18) is embedded between the sliding limit 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 billet (11); Step 4: Then, the steel billet (11) is gear hobbed by the gear hobbing cutter (8) in the gear hobbing part (2), and the lifting shaft (16) is driven by the external driving structure to drive the steel billet (11) and the rotating seat (9) to rotate synchronously with the gear hobbing cutter (8), and at the same time, the cooling liquid is sprayed on the contact point between the steel billet (11) and the gear hobbing cutter (8) and the outer wall through the liquid spray pipe, so as to cool the steel billet (11) and the gear hobbing cutter (8) and wash away the debris; Step 5: After the hobbing of the steel billet (11) is completed, the lifting shaft (16) is driven down by the three-dimensional moving platform (7) and the sliding limit block (17) is used to push the sliding pin (18) back to release the locking of the lifting shaft (16) and the moving cylinder (24), so that the sliding cylinder (10) and the rotating seat (9) fall off a sufficient distance; Step 6: After replacing the steel billet (11), repeat the above steps 1 to 5.

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