Air expansion shaft machining equipment and machining method thereof

Abstract

The invention relates to the field of air expansion shaft production and treatment, in particular to air expansion shaft machining equipment and a machining method thereof.The air expansion shaft machining equipment comprises a rack, a supporting cylinder and a transmission pipe, the supporting cylinder transversely penetrates out of the rack, the transmission pipe is rotationally arranged in the supporting cylinder, the two ends of the transmission pipe penetrate out of the supporting cylinder, and the air expansion shaft machining equipment further comprises a mounting cover fixed to the end of the transmission pipe; a plurality of sets of grinding parts are arranged on the outer circumference of the mounting cover in a surrounding mode, a core pipe stretching into the mounting cover is coaxially arranged in the transmission pipe, and a positioning part for supporting the multiple sets of grinding parts is arranged in the middle of the mounting cover. The polishing part adopts a composite motion polishing machining form of revolution and rotation, polishing blind areas or local excessive polishing are avoided, and the surface precision is improved; a sliding rod and a rotating rod of the grinding part are designed to be of a hollow structure and communicate with a cooling liquid channel, a synchronous ring and a pressing plate are matched to control opening and closing of a bottom hole, automatic control over the opening and closing states of the cooling liquid channel is achieved, cooling liquid waste is avoided, and the subsequent cleaning cost is reduced.

Description

Technical Field

[0001] The present invention relates to the field of air shaft production and processing, and particularly relates to an air shaft processing device and a processing method thereof. Background Art

[0002] An air shaft is a special winding and unwinding reel. There are many keyholes on its circumferential surface, and multiple expandable and contractible keys are installed inside. The expansion and contraction of the shaft diameter are realized through the air pressure change of the internal airbag, so as to complete the clamping and loosening of the coil material. It mainly consists of components such as a shaft core, an airbag, keys, and air nozzles. In industries such as printing, packaging, textile, and papermaking, it is applied to the winding work of various coil materials such as paper, film, and fabric. The air shaft inflates to make the keys protrude, tightly expand the inner hole of the coil material, and provides stable support and friction force during the winding process, ensuring that the coil material can be wound tightly and neatly on the shaft, preventing the coil material from slipping, loosening, or being wound unevenly during the winding process, and guaranteeing the winding quality. The expansion and contraction function of the air shaft makes it very convenient and fast during loading and unloading. Just put the coil material on the shaft and inflate it to start working; after the work is completed, deflate to make the keys retract, and the coil material can be easily removed, greatly saving the loading and unloading time.

[0003] An airbag needs to be installed inside the air shaft. After inflation, it is close to the inner wall of the air shaft tube. Therefore, to ensure the normal operation of the airbag and the smooth contraction of the keys, burrs need to be removed and the inner wall of the shaft tube and the keyholes need to be polished smoothly during the processing. Most of the existing polishing equipment adopts a single rotary polishing method, and the integrated rotary brush head is inserted into the shaft tube to rotate and polish. It is difficult to take into account the complex structures of the inner wall of the shaft tube and the keyholes, and it is easy to have polishing blind spots or local over-polishing. Moreover, when the traditional polishing equipment extends into the inner wall of the shaft tube for polishing, since the thin-walled shaft tube is prone to deformation under the high heat state of polishing, it is necessary to spray coolant correspondingly. However, the current coolant spraying mechanism only sets a water spray head outside the steel wire brush head, which lacks precise control. The liquid continues to be sprayed when moving to the keyhole, resulting in waste of coolant, and the splashing liquid will also increase the subsequent cleaning cost; and the existing equipment is difficult to adapt to air shafts of different specifications, and it is necessary to frequently disassemble components or manually fine-tune when adjusting the polishing force and the feeding position, with low efficiency and poor compatibility. Summary of the Invention

[0004] The object of the present invention is to provide an air shaft processing device and its processing method to solve the above problems. The grinding part adopts a compound movement grinding and processing form of revolution combined with rotation. This structure can make the grinding coverage effect on the inner wall of the air shaft tube and the keyhole more uniform, avoid the occurrence of grinding blind spots or local over-grinding, and improve the surface accuracy. The sliding rod and the rotating rod of the grinding part are designed as hollow structures and are connected to the coolant channel, and can be telescoped to expand and contract. The synchronous ring and the pressing plate cooperate to control the opening and closing of the bottom hole, realizing the automatic control of the opening and closing state of the coolant channel, avoiding coolant waste and reducing the subsequent cleaning cost. The details are described below.

[0005] To achieve the above object, the present invention provides the following technical solutions: An air shaft processing device provided by the present invention includes a frame, a support cylinder and a transmission pipe. The support cylinder horizontally passes through the frame. The transmission pipe is rotatably arranged inside the support cylinder, and both ends of the transmission pipe pass through the support cylinder. It also includes a mounting cover fixed to the end of the transmission pipe. A plurality of groups of grinding parts are circumferentially arranged around the outer circumference of the mounting cover. A core pipe extending into the mounting cover is coaxially arranged inside the transmission pipe. A positioning part for supporting a plurality of groups of grinding parts is arranged in the middle of the mounting cover. A plurality of radially penetrating side holes are arranged on the outer circumference of the mounting cover corresponding to the grinding parts. The grinding part includes a sliding rod passing through the side hole. The outer end of the sliding rod is rotatably provided with a rotating rod diverging outward in a circular shape. A brush head is arranged at the top of the rotating rod. A limiting frame for supporting the rotation of the rotating rod is fixed to the outside of the mounting cover. A radial spring for keeping the brush head tightly supported outward is arranged outside the limiting frame. A gear for driving the rotation of the rotating rod is rotatably arranged inside the limiting frame. A gear ring for synchronously meshing a plurality of groups of gears is fixed to the end face of the support cylinder.

[0006] Preferably, a rotating sleeve for accommodating the rotating rod to pass through is fixed to the outside of the limiting frame. The outer end of the rotating sleeve is rotatably provided with a rotating ring. One end of the radial spring away from the brush head abuts against the outside of the rotating ring. The outside of the brush head is densely provided with bristles.

[0007] Preferably, an auxiliary groove extending along the length direction is arranged on the outer circumference of the rotating rod. An auxiliary block slidably adapted to the auxiliary groove is arranged on the inner wall of the gear. The auxiliary block and the auxiliary groove cooperate to form a transmission mechanism for the gear to support the rotation of the rotating rod. A liquid outlet hole communicating with the rotating rod is arranged at the outer end of the brush head. Both the sliding rod and the rotating rod are hollow structures and are rotationally connected.

[0008] Preferably, the positioning portion includes a pull rod passing through the center of the outer end face of the mounting cover, the pull rod is threadedly engaged with the mounting cover, and a baffle is fixed to one end of the pull rod extending into the mounting cover, a synchronous ring is sleeved on the outer side of the pull rod between the baffle and the mounting cover, the inner wall of the synchronous ring is a conical arc surface, and the outer circumference of the synchronous ring is provided with a plurality of groups of constraint grooves for accommodating the vertical penetration of the sliding rod, the outer wall of the sliding rod is a regular polygon, ensuring that the outer wall of the sliding rod is close to the inner wall of the constraint groove, the sliding rod passes through the constraint groove and extends into the interior of the synchronous ring, and a pressure plate is fixed to one end, the pressure plate is an arc-shaped bent plate adapted to the inner wall of the synchronous ring, and a bottom hole is provided at the junction of the sliding rod and the pressure plate.

[0009] Preferably, a knob is fixed to the outer end of the pull rod, an axial spring is sleeved on the outer side of the pull rod between the synchronizer ring and the inner end surface of the mounting cover, and a plurality of through holes are provided on the end surface of the synchronizer ring corresponding to the constraint grooves.

[0010] Preferably, a connecting sleeve is fixed at one end of the core tube inserted into the mounting cover, the connecting sleeve is tightly pressed against the end face of the synchronization ring and is connected to the through hole, a rotating sleeve at the outer end of the core tube is provided with a shaft sleeve, and an injection tube is connected to the outside of the shaft sleeve.

[0011] Preferably, a driving sleeve threadedly engaged with the support tube is rotatably provided in the middle of the frame, a guide groove extending laterally is provided on the top side of the support tube, a guide seat vertically extending into the guide groove and used to support the rotation of the transmission tube is fixed on the outer side of the frame, the guide seat is slidably engaged with the guide groove to support the lateral sliding of the support tube, a driving motor is fixed on the frame below the support tube, and a grinding motor is provided on one side of the top of the frame.

[0012] Preferably, a driving belt is connected in transmission between the outer side of the driving sleeve and the output end of the driving motor, a retaining ring is rotatably arranged inside the guide seat to accommodate the transmission tube passing horizontally, a transmission block is fixed on the inner side of the retaining ring, a transmission groove extending along the length direction of the transmission tube is arranged on the outer side of the transmission tube, the transmission groove is slidably adapted to the transmission block, and a transmission belt is connected in transmission between the retaining ring and the grinding motor.

[0013] Preferably, a fixing plate extending outward is fixed to one end of the support tube away from the gear ring, an operating handle with a C-shaped bent rod structure passes through the outside of the fixing plate, a rotating ring that rotates and cooperates with the sleeve is fixed to the middle of the operating handle, and the end of the operating handle is gap-matched with the fixing plate.

[0014] The processing method of the inflatable shaft processing equipment comprises the following steps: a. When grinding the inner wall of the shaft tube and the keyholes distributed circumferentially through it, push the operating handle to move it towards the fixed plate, so as to drive the core tube to move horizontally by using the operating handle, push the synchronous ring of the positioning part horizontally by the connecting sleeve at the end of the operating handle, and then compress the axial spring. Use the constraint groove of the inner inclined groove structure of the synchronous ring to push the pressing plates of multiple grinding parts, so as to realize horizontal movement through manual operation of the synchronous ring, and then synchronously gather and contract multiple grinding parts to reduce the outer diameter of the annular brush body composed of multiple grinding parts, so as to facilitate the insertion of the mounting cover and multiple grinding parts into the shaft tube to be ground; b. After the mounting cover and multiple grinding parts extend into the shaft tube, release the operating handle to relieve the manual pushing state of the core tube end on the synchronous ring. At this time, the axial spring pushes the synchronous ring to reset, and the pressing effect of the synchronous ring on the pressing plate gradually weakens. At this time, the brush heads of multiple grinding parts expand outwards under the compression and support of the radial spring until the brush heads extend to the state of abutting against the inner wall of the shaft tube. Then start the grinding motor, drive the retaining ring to rotate by using the grinding motor, and then drive the transmission tube, its end mounting cover and grinding parts to rotate by using the retaining ring, and use the brush heads of the grinding parts to rotate and grind with the axis of the transmission tube as the center; c. During the overall rotation and grinding process of the grinding part following the mounting cover, since the gear on the outer side of the rotating rod is always meshed with the toothed ring on the end face of the support cylinder, the gear can drive the rotating rod and its top brush head to generate self-rotation, so as to improve the uniformity of the grinding coverage of the brush head. In addition, when the brush head abuts against the inner wall of the shaft tube, the pressing plate is separated from the inner wall of the synchronous ring, that is, the bottom hole of the sliding rod disengages from the constraint groove, and the closed state of the constraint groove on the bottom hole is released. The external coolant enters the bottom hole along the liquid injection pipe, the core tube and the through hole, and sprays outwards along the sliding rod, the rotating rod and the liquid outlet hole to the grinding area of the brush head to cool down the grinding of the thin-walled shaft tube; d. When a certain group of brush heads rotates to the keyhole position of the shaft tube, the blocking and supporting effect of the inner wall of the shaft tube on the brush head disappears, and the radial spring pushes the brush head to automatically penetrate into the keyhole. In this state, the pressing plate at the end of the sliding rod is pressed against the inner wall of the synchronous ring again to automatically close the bottom hole of the sliding rod, ensuring that the coolant will not spray out along the keyhole when the brush head penetrates into the keyhole to rotate and grind the burrs, and preventing the coolant from splashing and causing difficulties in subsequent cleaning; e. When it is necessary to manually control the grinding force at different positions of the shaft tube, drive the driving sleeve to rotate by using the driving motor. Since the driving sleeve is in threaded cooperation with the support cylinder and the driving sleeve is restricted by the guide seat to only perform horizontal sliding, the rotation of the driving sleeve can drive the support cylinder to support the transmission tube and the mounting cover as a whole to move horizontally, so as to realize the automatic horizontal feeding of the mounting cover and the grinding parts on its outer side. Manually hold the operating handle to change the pressing force of the core tube end on the synchronous ring, and then adjust the supporting position of the synchronous ring on the pressing plate, so as to control the expansion and gathering state of the brush heads at the outer end of the grinding part, so as to realize the adjustment of the grinding force; f. When it is necessary to pre-limit the outward expansion of multiple groups of grinding parts to prevent the brush head from excessively extending out of the keyhole of the shaft tube, the pull rod is rotated by turning the knob, and the threaded cooperation of the pull rod and the mounting cover is utilized to change the lateral position of the baffle plate at the end of the pull rod, and the baffle plate is utilized to push the synchronizer ring to compress the axial spring, thereby adjusting and limiting the maximum distance between the synchronizer ring and the end face of the mounting cover to change the inward tightening position of the pressure plate, to prevent the grinding part from moving to the keyhole and extending excessively to hinder the overall rotation of the mounting cover, and to ensure that the brush head can smoothly follow the mounting cover to rotate across the keyhole.

[0015] The beneficial effects are as follows: 1. The grinding part of the present invention adopts a composite motion grinding processing form of revolution combined with rotation. The transmission tube drives the installation cover and the brush head to revolve, and at the same time, the end face gear ring of the support tube meshes with the gear to drive the rotating rod and the brush head to rotate. Compared with the traditional single rotation grinding method, this structure can grind the inner wall of the air shaft tube and the key hole more evenly, avoid the occurrence of grinding blind areas or local over-grinding, and improve the surface accuracy; 2. The sliding rod and rotating rod of the grinding part are designed as hollow structures and connected to the coolant channel, and can be extended to expand outward and retract inward. The synchronizer ring and the pressure plate cooperate to control the opening and closing of the bottom hole. When the brush head is grinding on the inner wall of the shaft tube, the brush head is pressed against the inner wall of the shaft tube. At this time, the bottom hole of the sliding rod is separated from the constraint groove, the bottom hole is opened, and the coolant is continuously sprayed out; when the brush head rotates to the key hole position, the radial spring pushes the brush head into the key hole, and the pressure plate is pressed against the inner wall of the synchronizer ring again, closing the coolant channel of the grinding part, avoiding waste of coolant and reducing subsequent cleaning costs; 3. It is equipped with a dual adjustment mechanism. When manually and dynamically adjusting the brush head, the operator manually holds the operating handle to control the lateral position of the core tube to change the pressing force of the core tube on the synchronous ring in real time, thereby using the different positions of the synchronous ring to control the expansion positions of multiple grinding parts, which is convenient for the operator to adjust the corresponding grinding intensity according to different positions; when in the preset fixed state, the operator adjusts the position of the pull rod by rotating the knob, changes the axial displacement of the synchronous ring, pre-controls the degree of expansion of the brush head, and pre-limits the expansion distance of the brush head to ensure the consistency of the grinding effect at different positions; 4. The operating handle, core tube and synchronous ring are used to control the extension and contraction of the grinding part. When loading, the operating handle is pushed to bring the grinding part together, so that the shaft tube can be easily inserted. Compared with the existing equipment that is difficult to adapt to different specifications of pneumatic shafts and has cumbersome adjustments, this solution is easy to operate, has strong compatibility, and can quickly meet the grinding needs of shaft tubes with different wall thicknesses. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 is the front view structure diagram of the present invention; Figure 2 is the three-dimensional structure schematic diagram of the present invention; Figure 3 is the top view structure diagram of the present invention; Figure 4 is the overall structure splitting schematic diagram of the present invention; Figure 5 is the partial structure splitting schematic diagram of the present invention; Figure 6 is the three-dimensional structure schematic diagram of the mounting cover of the present invention; Figure 7 is the three-dimensional structure schematic diagram of the side hole of the present invention; Figure 8 is the structure splitting schematic diagram of the grinding part of the present invention; Figure 9 is the three-dimensional structure schematic diagram of the synchronizing ring of the present invention; Figure 10 is the three-dimensional structure schematic diagram of the grinding part of the present invention; Figure 11 is the three-dimensional structure schematic diagram of the support cylinder of the present invention; Figure 12 is the three-dimensional structure schematic diagram of the positioning part of the present invention; Figure 13 is the front view structure diagram of the mounting cover of the present invention; Figure 14 is the front view sectional view of the mounting cover of the present invention; Figure 15 is the three-dimensional structure schematic diagram of the present invention in another direction.

[0018] The description of the reference numerals is as follows: 1. Frame; 101. Driving sleeve; 102. Driving belt; 103. Bottom plate; 2. Support cylinder; 201. Tooth ring; 202. Guide groove; 203. Fixed plate; 3. Transmission pipe; 301. Transmission groove; 302. Fixed ring; 303. Inner fixing hole; 4. Installation cover; 401. Side hole; 402. Limit frame; 403. Rotating sleeve; 403a. Rotating ring; 404. Radial spring; 405. Outer fixing hole; 506. Gear; 506a. Auxiliary block; 5. Grinding part; 501. Sliding rod; 501a. Bottom hole; 502. Rotating rod; 502a. Auxiliary groove; 503. Brush head; 504. Liquid outlet hole; 505. Pressure plate; 6. Core pipe; 601. Connecting sleeve; 602. Bush; 7. Liquid injection pipe; 8. Guide seat; 801. Retaining ring; 802. Transmission belt; 803. Transmission block; 9. Grinding motor; 10. Driving motor; 11. Shaft pipe; 12. Operating handle; 13. Positioning part; 13a. Synchronous ring; 13b. Constraint groove; 13c. Pull rod; 13d. Knob; 13e. Stop disc; 13f. Axial spring; 13j. Through hole. Detailed implementation manners

[0019] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without making creative efforts fall within the scope protected by the present invention.

[0020] See Figures 1 - 15 As shown, the present invention discloses a device for processing an air shaft, which includes a frame 1, a support cylinder 2 and a transmission pipe 3. The support cylinder 2 horizontally penetrates through the frame 1. The transmission pipe 3 is rotatably arranged inside the support cylinder 2, and both ends of the transmission pipe 3 penetrate through the support cylinder 2. A bottom plate 103 installed on the ground is fixed to the bottom of the frame 1. The device further includes an installation cover 4 fixed to the end of the transmission pipe 3. A plurality of groups of grinding parts 5 are arranged around the outer circumference of the installation cover 4. A core pipe 6 extending into the installation cover 4 is coaxially arranged inside the transmission pipe 3. A positioning part 13 for supporting a plurality of groups of grinding parts 5 is arranged in the middle of the installation cover 4. The positioning part 13 is used to adjust the expansion and gathering distances of the plurality of groups of grinding parts 5 to adapt to the inner wall grinding of the shaft pipe 11 of air shafts with different inner diameters. A plurality of radially penetrating side holes 401 are provided on the outer circumference of the mounting cover 4 corresponding to the grinding part 5. The grinding part 5 includes a sliding rod 501 passing through the side holes 401. The sliding rod 501 is slidably matched with the side holes 401. A rotating rod 502 is rotatably arranged at the outer end of the sliding rod 501. The rotating rods 502 of multiple groups of grinding parts 5 are distributed in a circumferential divergent manner outward. A brush head 503 is arranged at the top of the rotating rod 502. The brush head 503 is an annular structure with bristles densely distributed on its outer circumference. A limiting frame 402 for supporting the rotation of the rotating rod 502 is fixed on the outer side of the mounting cover 4. A radial spring 404 for keeping the brush head 503 tightly supported outward is arranged on the outer side of the limiting frame 402. Specifically, a rotating sleeve 403 for accommodating the rotating rod 502 to pass through is fixed on the outer side of the limiting frame 402. A rotating ring 403a is rotatably arranged at the outer end of the rotating sleeve 403. One end of the radial spring 404 away from the brush head 503 abuts against the outer side of the rotating ring 403a. A gear 506 for driving the rotating rod 502 to rotate is rotatably arranged inside the limiting frame 402. A toothed ring 201 for synchronously meshing multiple groups of gears 506 is fixed on the end face of the support cylinder 2. When the grinding part 5 rotates with the transmission pipe 3, the gear 506 on the grinding part 5 rotates selflessly under the action of the toothed ring 201 engaged therewith, thereby driving the rotating rod 502 to rotate. By using the toothed ring 201 to support multiple groups of gears 506 to rotate following the mounting cover 4 while supporting the rotation of the rotating rod 502 and the brush head 503, the revolution and self-rotation actions of the brush head 503 are realized.

[0021] In the air shaft processing equipment disclosed in this application, by setting the compound movement of the revolution and self-rotation of the brush head 503, the entire inner wall surface and keyhole positions can be covered by grinding in all directions, effectively avoiding the grinding blind areas and local excessive wear of the traditional single rotation method. The design of the positioning part 13 enables the equipment to flexibly adjust the expansion and gathering distances of the brush head 503, and can adapt to air shafts with different inner diameters, greatly improving the versatility and applicability of the equipment, thereby significantly improving the production efficiency and processing quality. The combined structure of the radial spring 404 and the positioning part 13 ensures that the brush head always adheres tightly to the inner wall of the shaft tube and can automatically penetrate into the keyhole to achieve seamless switching and precise grinding of different parts, reducing the defective rate caused by uneven grinding and improving the overall production quality of the air shaft.

[0022] As an optional implementation manner, an auxiliary groove 502a extending along the length direction is arranged on the outer circumference of the rotating rod 502. An auxiliary block 506a slidably adapted to the auxiliary groove 502a is arranged on the inner wall of the gear 506. The cooperation between the auxiliary block 506a and the auxiliary groove 502a forms a transmission mechanism for the gear 506 to support the rotation of the rotating rod 502, ensuring that the gear 506 can drive the rotating rod 502 to rotate. At the same time, the rotating rod 502 can be telescoped to adjust the extension distance. A liquid outlet hole 504 communicating with the rotating rod 502 is arranged at the outer end of the brush head 503. Both the sliding rod 501 and the rotating rod 502 are hollow structures and are rotatably communicated. The positioning part 13 includes a pull rod 13c passing through the center of the outer end face of the mounting cover 4. The pull rod 13c is in threaded fit with the mounting cover 4. One end of the pull rod 13c extending into the mounting cover 4 is fixed with a retaining disc 13e. An annular synchronizing ring 13a is sleeved on the outer side of the pull rod 13c between the retaining disc 13e and the mounting cover 4. The annular synchronizing ring 13a is in clearance fit with the pull rod 13c. The inner wall of the annular synchronizing ring 13a is a conical arc surface. Multiple groups of constraint grooves 13b through which the sliding rod 501 vertically penetrates are arranged on the outer circumference of the annular synchronizing ring 13a. The outer wall of the sliding rod 501 is a regular polygon to ensure that the outer wall of the sliding rod 501 is close to the inner wall of the constraint groove 13b. The sliding rod 501 penetrates through the constraint groove 13b and extends into the interior of the annular synchronizing ring 13a. One end is fixed with a pressing plate 505. The pressing plate 505 is an arc-shaped bent plate adapted to the inner wall of the annular synchronizing ring 13a. A bottom hole 501a is arranged at the connection between the sliding rod 501 and the pressing plate 505. With such a setting, when the pressing plate 505 is pressed to the inner side of the annular synchronizing ring 13a, a part of the bottom hole 501a of the sliding rod 501 is blocked by the side wall of the constraint groove 13b, and at this time the bottom hole 501a is in a closed state. When the brush head 503 is blocked and squeezed by the inner wall of the shaft tube 11, the rotating rod 502 pushes the sliding rod 501 and the pressing plate 505 to contract, and the radial spring 404 is compressed. At this time, the bottom hole 501a disengages from the constraint groove 13b to release the closing effect of the bottom hole 501a, so as to realize the discharge of the coolant along the bottom hole 501a, the sliding rod 501, the rotating rod 502 and the liquid outlet hole 504; A knob 13d is fixed to the outer end of the pull rod 13c. An axial spring 13f is sleeved on the outer side of the pull rod 13c between the end face of the annular synchronizing ring 13a and the inner end face of the mounting cover 4. Multiple through holes 13j corresponding to the constraint grooves 13b are arranged on the end face of the annular synchronizing ring 13a. In addition, one end of the core tube 6 inserted into the mounting cover 4 is fixed with a communicating sleeve 601. The communicating sleeve 601 abuts against the end face of the annular synchronizing ring 13a and is connected to the through holes 13j, thereby connecting the core tube 6 and the annular synchronizing ring 13a. The outer circumference of the annular synchronizing ring 13a is in sliding seal with the inner wall of the mounting cover 4 to form a transfer cavity for accommodating the coolant inside the mounting cover 4. The outer end of the core tube 6 is rotatably sleeved with a shaft sleeve 602. A liquid injection pipe 7 is connected to the outside of the shaft sleeve 602. A driving sleeve 101 in threaded fit with the support cylinder 2 is rotatably arranged in the middle of the frame 1. A horizontally extending guide groove 202 is arranged on the top side of the support cylinder 2. A guide seat 8 vertically extending into the guide groove 202 and used to support the rotation of the transmission pipe 3 is fixed outside the frame 1. The guide seat 8 is in sliding fit with the guide groove 202 to support the horizontal sliding of the support cylinder 2. A driving motor 10 is fixed on the frame 1 below the support cylinder 2, and a grinding motor 9 is arranged on one side of the top of the frame 1; In addition, a drive belt 102 is connected between the outer side of the drive sleeve 101 and the output end of the drive motor 10. A retaining ring 801 through which the transmission pipe 3 passes horizontally is rotatably arranged inside the guide seat 8. A transmission block 803 is fixed to the inner side of the retaining ring 801. A transmission groove 301 extending along the length direction is arranged on the outer side of the transmission pipe 3. The transmission groove 301 is slidably matched with the transmission block 803. A transmission belt 802 is connected between the retaining ring 801 and the grinding motor 9. One end of the support cylinder 2 away from the gear ring 201 is fixed with a fixing plate 203 extending outwards. An operating handle 12 with a C-shaped bent rod structure penetrates through the outer side of the fixing plate 203. A rotating ring that is rotationally matched with the shaft sleeve 602 is fixed in the middle of the operating handle 12. The end of the operating handle 12 is in clearance fit with the fixing plate 203. One end of the support cylinder 2 close to the mounting cover 4 is provided with a fixing ring 302 extending into the mounting cover 4. Inner fixing holes 303 are arranged on the outer circumference of the fixing ring 302. Outer fixing holes 405 are correspondingly arranged on the outer circumference of the mounting cover 4. Bolts that are threadedly connected to the inner fixing holes 303 are inserted into the outer fixing holes 405.

[0023] In the air shaft processing equipment disclosed in this application, by driving the transmission pipe 3 to rotate through the grinding motor 9 to drive the mounting cover 4 to rotate, combined with the synchronous meshing of the end face gear ring 201 of the support cylinder and the gear 506, a compound movement of revolution and rotation is realized for multiple groups of brush heads on the mounting cover 4, so that the bristles can fully cover and continuously rub on the inner wall of the shaft tube 11 and the keyhole position, thereby eliminating the grinding blind spots and local excessive wear that may occur in the traditional single rotation method. The radial spring 404 continuously provides an elastic force for the brush head 503 to expand outwards, ensuring that the brush head 503 always adheres tightly to the inner wall and can automatically penetrate into the keyhole to achieve precise grinding of different parts. The pull rod 13c of the positioning part 13 and the synchronous ring 13a can steplessly change the expansion diameter of the brush head 503 through thread adjustment, quickly adapting to air shafts with different inner diameters and eliminating the cumbersome operation of disassembling and replacing parts. The communication sleeve 601 between the core tube 6 and the synchronous ring 13a and the through hole 13j cooperate with the opening and closing control of the pressure plate 505 to construct a transfer cavity for the coolant, which can continuously spray the coolant when the brush head 503 rubs against the inner wall and automatically cut off the liquid path when the brush head 503 enters the keyhole, effectively saving the coolant and reducing the subsequent cleaning cost. At the same time, the linkage design of the operating handle 12, the drive sleeve 101 and the guide seat 8 enables the equipment to flexibly realize the transverse feed and the adjustment of the grinding depth while ensuring stable rotary grinding. The overall structure is compact, the components cooperate with each other, the maintenance is simple, and the versatility is strong. It not only significantly improves the grinding efficiency and quality, but also reduces the energy consumption and cost, meeting the intelligent and high-efficiency requirements for the processing of air shafts of different sizes.

[0024] The present invention also discloses a processing method for the air shaft processing equipment, including the following steps: a. When grinding the inner wall of the shaft tube 11 and the key holes distributed through its circumference, push the operating handle 12 to move it toward the fixed plate 203, so that the core tube 6 can be moved laterally by the operating handle 12, and the synchronous ring 13a of the positioning part 13 can be pushed laterally by the connecting sleeve 601 at the end of the operating handle 12, thereby compressing the axial spring 13f, and the restraining groove 13b of the inner oblique groove structure of the synchronous ring 13a can be used to push the pressure plate 505 of the multiple grinding parts 5, so that the multiple grinding parts 5 can be manually operated to move laterally, thereby synchronously gathering and shrinking the multiple grinding parts 5 to reduce the outer diameter of the annular brush body composed of the multiple grinding parts 5, so as to facilitate the installation cover 4 and the multiple grinding parts 5 to be inserted into the shaft tube 11 to be grinded; b. After the installation cover 4 and the multiple grinding parts 5 are inserted into the shaft tube 11, the operating handle 12 is released to release the manual pushing state of the core tube 6 end on the synchronous ring 13a. At this time, the axial spring 13f pushes the synchronous ring 13a to reset, and the pressing effect of the synchronous ring 13a on the pressure plate 505 is gradually weakened. At this time, the brush heads 503 of the multiple grinding parts 5 expand outward under the compression support of the radial spring 404 until the brush heads 503 extend to the state of pressing against the inner wall of the shaft tube 11, and then the grinding motor 9 is turned on, and the grinding motor 9 is used to drive the retaining ring 801 to rotate, and then the retaining ring 801 is used to drive the transmission tube 3 and its end installation cover 4 and the grinding part 5 to rotate, and the brush head 503 of the grinding part 5 is used to rotate and grind with the axis of the transmission tube 3 as the center; c. During the grinding process of the grinding part 5 following the mounting cover 4 to rotate and grind, since the gear 506 on the outer side of the rotating rod 502 is always meshed with the gear ring 201 on the end face of the support tube 2, the gear 506 can drive the rotating rod 502 and the brush head 503 at the top thereof to rotate, thereby improving the grinding coverage uniformity of the brush head 503. In addition, when the brush head 503 is pressed against the inner wall of the shaft tube 11, the pressure plate 505 is separated from the inner wall of the synchronization ring 13a, that is, the bottom hole 501a of the sliding rod 501 is out of the constraint groove 13b, and the closed state of the constraint groove 13b on the bottom hole 501a is released, and the external coolant enters the bottom hole 501a along the injection tube 7, the core tube 6, and the through hole 13j, and is sprayed outwardly along the sliding rod 501, the rotating rod 502 and the liquid outlet 504 to the grinding area of ​​the brush head 503, and the thin-walled shaft tube 11 is ground and cooled; d. When a group of brush heads 503 rotate to the keyhole position of the shaft tube 11, the blocking and supporting effect of the inner wall of the shaft tube 11 on the brush head 503 disappears, and the radial spring 404 pushes the brush head 503 to automatically probe into the keyhole. In this state, the pressure plate 505 at the end of the sliding rod 501 is pressed against the inner wall of the synchronization ring 13a again to automatically close the bottom hole 501a of the sliding rod 501, ensuring that when the brush head 503 probes into the keyhole and rotates to grind burrs, the coolant will not be sprayed along the keyhole to cause waste, and prevent the splash of coolant from causing subsequent cleaning difficulties; e. When it is necessary to manually control the grinding force at different positions of the shaft tube 11, the driving motor 10 drives the driving sleeve 101 to rotate. Since the driving sleeve 101 is in threaded fit with the support cylinder 2 and the driving sleeve 101 is restricted by the guide seat 8 to only perform lateral sliding, the rotation of the driving sleeve 101 can drive the support cylinder 2 to support the transmission tube 3 and the mounting cover 4 as a whole to translate laterally, so that the automatic lateral feeding of the mounting cover 4 and the grinding part 5 on its outer side can be realized. Manually hold the operating handle 12 to change the pressing force of the end of the core tube 6 against the synchronizing ring 13a, and then adjust the supporting position of the synchronizing ring 13a on the pressing plate 505, so as to control the expansion and gathering state of the brush head 503 at the outer end of the grinding part 5, so as to realize the adjustment of the grinding force; f. When it is necessary to pre-limit the outward expansion degree of multiple groups of grinding parts 5 to prevent the brush head 503 from protruding excessively from the keyhole of the shaft tube 11, rotate the knob 13d to operate the pull rod 13c to rotate. By the threaded fit of the pull rod 13c and the mounting cover 4, the lateral position of the end stop disc 13e of the pull rod 13c is changed, and the stop disc 13e is used to push the synchronizing ring 13a to compress the axial spring 13f, so as to adjust and limit the maximum distance between the synchronizing ring 13a and the end face of the mounting cover 4, so as to change the inward tightening position of the pressing plate 505, avoid the grinding part 5 moving to the keyhole and protruding excessively to hinder the overall rotation of the mounting cover 4, and ensure the smoothness of the brush head 503 following the mounting cover 4 to rotate across the keyhole.

[0025] The grinding part 5 adopts a composite movement grinding and processing form of revolution combined with rotation. The transmission tube 3 drives the mounting cover 4 and the brush head 503 to revolve. At the same time, the end face gear ring 201 of the support cylinder 2 meshes with the gear 506 to drive the rotating rod 502 and the brush head 503 to rotate. Compared with the traditional single rotation grinding method, this structure can make the grinding coverage effect on the inner wall and keyhole of the air shaft tube 11 more uniform, avoid the occurrence of grinding blind spots or local over-grinding, and improve the surface accuracy; The sliding rod 501 and the rotating rod 502 of the grinding part 5 are designed as hollow structures and communicate with the coolant channels, and can be telescoped to realize outward expansion and inward contraction. The synchronizing ring 13a and the pressing plate 505 cooperate to control the opening and closing of the bottom hole 501a. When the brush head 503 grinds on the inner wall of the shaft tube 11, the brush head 503 presses against the inner wall of the shaft tube 11. At this time, the bottom hole 501a of the sliding rod 501 breaks away from the constraint groove 13b, and the bottom hole 501a opens, and the coolant continuously sprays out; when the brush head 503 rotates to the keyhole position, the radial spring 404 pushes the brush head 503 into the keyhole, and the pressing plate 505 presses against the inner wall of the synchronizing ring 13a again to close the coolant channel of this group of grinding parts 5, avoiding coolant waste and reducing the subsequent cleaning cost; It is provided with a dual adjustment mechanism. When manually and dynamically adjusting the brush head 503, the operator manually holds the operating handle 12 to control the lateral position of the core tube 6, so as to change the pressing force of the core tube 6 against the synchronous ring 13a in real time, thereby controlling the expansion positions of multiple grinding parts 5 by different positions of the synchronous ring 13a, which is convenient for the operator to adjust the corresponding grinding intensity according to different positions. In the preset fixed state, the operator adjusts the position of the pull rod 13c by rotating the knob 13d, changes the axial displacement of the synchronous ring 13a, pre-controls the outward expansion degree of the brush head 503, and pre-limits the outward expansion distance of the brush head 503 to ensure the consistency of the grinding effects at different positions. The telescopic movement of the grinding part 5 is controlled by the linkage of the operating handle 12, the core tube 6 and the synchronous ring 13a. When loading, the operating handle 12 is pushed to gather the grinding part 5, and it can easily penetrate into the shaft tube 11. Compared with the problems of the existing equipment that it is difficult to adapt to different specifications of air chucks and the adjustment is cumbersome, this solution is easy to operate, has strong compatibility, and can quickly meet the grinding requirements of shaft tubes 11 with different wall thicknesses.

[0026] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims described.

Claims

1. An inflatable shaft processing device, comprising a frame (1), a support tube (2) and a transmission tube (3), wherein the support tube (2) passes through the frame (1) laterally, the transmission tube (3) is rotatably arranged inside the support tube (2), and both ends of the transmission tube (3) pass through the support tube (2), characterized in that: It also includes a mounting cover (4) fixed to the end of the transmission tube (3), wherein a plurality of groups of grinding portions (5) are arranged around the outer circumference of the mounting cover (4); A core tube (6) is coaxially arranged inside the transmission tube (3) and extends into the installation cover (4); The middle portion of the mounting cover (4) is provided with a positioning portion (13) for supporting and adjusting the expansion and convergence distances of the multiple groups of grinding portions (5) to adapt to the grinding of the inner walls of the inflatable shaft tubes (11) with different inner diameters; A grinding motor (9) is provided on one side of the frame (1), and the output end of the grinding motor drives the transmission tube (3) to rotate via a retaining ring (801) and a transmission belt (802); A gear ring (201) which is synchronously meshed with a plurality of sets of gears (506) is fixed to the end surface of the support tube (2) so as to drive the gears (506) to rotate when the transmission tube (3) and the mounting cover (4) revolve, thereby causing the brush heads (503) of each grinding part (5) to generate a composite motion of revolving and rotating.

2. The inflatable shaft processing equipment according to claim 1, characterized in that: The polishing part (5) comprises: A plurality of side holes (401) extending radially through the mounting cover (4); A sliding rod (501) slidably matched with the side hole (401), with a rotating rod (502) rotatably arranged at its outer end; The brush head (503) is arranged on the top end of the rotating rod (502); A limit frame (402) is fixed on the outside of the mounting cover (4) for supporting the rotation of the rotating rod (502), and a radial spring (404) is arranged on the outside of the limit frame (402) for keeping the brush head (503) outwardly tightened, and the gear (506) is rotatably arranged inside the limit frame (402) and can drive the rotating rod (502) to rotate.

3. The inflatable shaft processing equipment according to claim 2, characterized in that: The outer circumference of the rotating rod (502) is provided with an auxiliary groove (502a) extending along its length direction; the inner wall of the gear (506) is provided with an auxiliary block (506a) slidably adapted to the auxiliary groove (502a); the auxiliary block (506a) cooperates with the auxiliary groove (502a) to form a transmission mechanism for the gear (506) to support the rotating rod (502) to rotate; the outer end of the brush head (503) is provided with a liquid outlet (504) connected to the rotating rod (502); the sliding rod (501) and the rotating rod (502) are both hollow structures and are connected in rotation.

4. The inflatable shaft processing equipment according to claim 3, characterized in that: The positioning portion (13) comprises a pull rod (13c) penetrating the center of the outer end surface of the mounting cover (4), the pull rod (13c) being threadedly matched with the mounting cover (4), and a baffle (13e) being fixed to one end of the pull rod (13c) extending into the mounting cover (4), a synchronizer ring (13a) being sleeved on the outer side of the pull rod (13c) between the baffle (13e) and the mounting cover (4), the inner wall of the synchronizer ring (13a) being a conical arc surface, and a plurality of groups of capacitive contact surfaces are arranged on the outer circumference of the synchronizer ring (13a). A restraining groove (13b) is vertically penetrated by a sliding rod (501), the outer wall of the sliding rod (501) is close to the inner wall of the restraining groove (13b), the sliding rod (501) penetrates the restraining groove (13b) and extends into the interior of the synchronization ring (13a), and a pressure plate (505) is fixed at one end thereof, the pressure plate (505) is an arc-shaped bent plate adapted to the inner wall of the synchronization ring (13a), and a bottom hole (501a) is provided at the junction of the sliding rod (501) and the pressure plate (505).

5. The inflatable shaft processing equipment according to claim 4, characterized in that: A knob (13d) is fixed to the outer end of the pull rod (13c), an axial spring (13f) is sleeved on the outer side of the pull rod (13c) between the synchronizing ring (13a) and the inner end surface of the mounting cover (4), and a plurality of through holes (13j) are provided on the end surface of the synchronizing ring (13a) corresponding to the restraining groove (13b).

6. The inflatable shaft processing equipment according to claim 5, characterized in that: The core tube (6) is inserted into the installation cover (4) and one end of which is fixed with a connecting sleeve (601). The connecting sleeve (601) is tightly abutted against the end surface of the synchronization ring (13a) and is connected to the through hole (13j). The outer end of the core tube (6) is provided with a shaft sleeve (602), and the outer side of the shaft sleeve (602) is connected to a liquid injection pipe (7).

7. The inflatable shaft processing equipment according to claim 6, characterized in that: A drive sleeve (101) threadedly engaged with the support tube (2) is rotatably arranged in the middle of the frame (1); a guide groove (202) extending transversely is arranged on the top side of the support tube (2); a guide seat (8) vertically extending into the guide groove (202) and used to support the rotation of the transmission tube (3) is fixed on the outside of the frame (1); the guide seat (8) is slidably engaged with the guide groove (202) to support the transverse sliding of the support tube (2); a drive motor (10) is fixed on the frame (1) below the support tube (2); and a drive belt (102) is drivingly connected between the outside of the drive sleeve (101) and the output end of the drive motor (10).

8. The inflatable shaft processing equipment according to claim 7, characterized in that: A retaining ring (801) is rotatably arranged inside the guide seat (8) to accommodate the transmission tube (3) passing through horizontally, a transmission block (803) is fixed on the inner side of the retaining ring (801), a transmission groove (301) extending along the length direction of the transmission tube (3) is arranged on the outer side, the transmission groove (301) is slidably matched with the transmission block (803), and a transmission belt (802) is connected between the retaining ring (801) and the grinding motor (9).

9. The inflatable shaft processing equipment according to claim 8, characterized in that: A fixing plate (203) extending outward is fixed to one end of the support tube (2) away from the gear ring (201); an operating handle (12) of a C-shaped bent rod structure passes through the outside of the fixing plate (203); a rotating ring rotatably engaged with the shaft sleeve (602) is fixed to the middle of the operating handle (12); and an end of the operating handle (12) is clearance-matched with the fixing plate (203).

10. The processing method of the inflatable shaft processing equipment according to claim 9, characterized in that: The following steps are involved: a. Pushing the operating handle (12) causes the core tube (6) to drive the synchronizer ring (13a) to move laterally, compressing the axial spring (13f), and causing the plurality of grinding portions (5) to contract so as to be inserted into the inflatable shaft tube (11) to be ground; b. After the mounting cover (4) and the plurality of grinding parts (5) are inserted into the shaft tube (11), the operating handle (12) is released, so that the axial spring (13f) pushes the synchronization ring (13a) to reset, and the brush head (503) expands and presses against the inner wall of the shaft tube (11) under the action of the radial spring (404), and the grinding motor (9) is turned on to drive the transmission tube (3) and the mounting cover (4) to rotate, thereby realizing orbital grinding; c. During the grinding process in which the grinding portion (5) as a whole rotates and follows the mounting cover (4), since the gear (506) on the outer side of the rotating rod (502) is always meshed with the ring gear (201) on the end surface of the support tube (2), the gear (506) can drive the rotating rod (502) and the top brush head (503) thereof to rotate; d. When the brush head (503) is pressed against the inner wall of the shaft tube (11), the pressure plate (505) is separated from the inner wall of the synchronization ring (13a), the bottom hole (501a) of the sliding rod (501) is out of the restraining groove (13b), and the external coolant enters the bottom hole (501a) along the injection tube (7), the core tube (6), and the through hole (13j), and is sprayed outward along the sliding rod (501), the rotating rod (502), and the liquid outlet hole (504) to the grinding area of ​​the brush head (503); When the brush head (503) rotates to the key hole position of the shaft tube (11), the radial spring (404) pushes the brush head (503) to automatically enter the key hole. In this state, the pressure plate (505) at the end of the sliding rod (501) is pressed against the inner wall of the synchronization ring (13a) again to close the bottom hole (501a) of the sliding rod (501) and cut off the coolant channel; e. When it is necessary to adjust the grinding feed, the driving motor (10) drives the driving sleeve (101) to rotate, so that the support tube (2) moves laterally along the guide groove (202), thereby realizing the lateral feeding of the installation cover (4) and the grinding part (5), and the operating handle (12) is manually held to change the pressing force of the end of the core tube (6) against the synchronization ring (13a), thereby adjusting the supporting position of the synchronization ring (13a) on the pressure plate (505), thereby controlling the expansion and gathering state of the brush head (503) at the outer end of the grinding part (5), so as to realize the adjustment of the grinding force; f. When the maximum outward expansion degree of the brush head (503) needs to be preset, the rotating pull rod (13c) changes the position of the synchronization ring (13a) through the baffle plate (13e) to adjust the maximum distance between the synchronization ring (13a) and the end surface of the mounting cover (4), and changes the inward tightening position of the pressure plate (505), thereby limiting the expansion distance of the brush head (503).

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