Ceramic sleeve inner hole grinding device based on ultrasonic vibration auxiliary structure

Abstract

The invention relates to the technical field of ceramic sleeve machining, and discloses a ceramic sleeve inner hole grinding device based on an ultrasonic vibration auxiliary structure, which comprises a machine base with a workbench, a supporting plate fixedly connected to the machine base is arranged at the lower end of the workbench, a connecting sleeve rod is arranged below a main shaft of the machine base, and a honing head body is clamped at the lower end of the connecting sleeve rod. The machine base and the connecting sleeve rod are jointly provided with an ultrasonic vibration part. The ceramic sleeve inner hole grinding device based on the ultrasonic vibration auxiliary structure can effectively solve the problems that in the prior art, ceramic sleeve cracking can be caused by too large grinding force or instant impact; the problems that clamping is not easy when horizontal honing is adopted, oilstone on the lower portion bears larger cutting force under the action of the gravity of a ceramic sleeve, abrasion of the oilstone is uneven, and ceramic abrasive dust is difficult to effectively discharge, oilstone air holes are prone to being blocked, the grinding efficiency is reduced, friction heat generation is intensified, and the machined surface is scratched when vertical honing is adopted in the prior art are solved.

Description

Technical Field

[0001] The invention relates to the technical field of ceramic sleeve processing, and in particular to a ceramic sleeve inner hole grinding device based on an ultrasonic vibration auxiliary structure. Background Art

[0002] Ceramic bushings are widely used in aerospace, semiconductor, and medical applications due to their high hardness, high brittleness, wear resistance, and chemical stability. However, high-precision machining of the inner bore of ceramic bushings remains a significant challenge. Compared to metal materials, grinding the inner bore of ceramic bushings using CNC deep-hole honing machines presents unique challenges and difficulties. CNC deep-hole honing machines are primarily categorized as horizontal honing and vertical honing machines.

[0003] In this regard, the present application designs a ceramic sleeve inner hole grinding device based on an ultrasonic vibration assisted structure. When the existing CNC deep hole honing machine is used to perform inner hole grinding on larger ceramic sleeves, since the removal of ceramic material mainly relies on brittle fracture, a higher grinding force is required, but excessive grinding force or instantaneous impact will cause the ceramic sleeve to crack; it is not easy to clamp when horizontal honing is used, and under the action of the ceramic sleeve's own gravity, the lower oilstone will bear a greater cutting force, resulting in uneven wear of the oilstone, and when vertical honing is used, the ceramic grinding chips are difficult to be effectively discharged, which easily clogs the oilstone pores, reduces grinding efficiency, aggravates frictional heat, and scratches the processed surface. Summary of the Invention

[0004] In response to the above-mentioned shortcomings of the prior art, the present invention provides a ceramic sleeve inner hole grinding device based on an ultrasonic vibration assisted structure, which can effectively solve the problems in the prior art that excessive grinding force or instantaneous impact will cause the ceramic sleeve to crack; it is not easy to clamp when horizontal honing is used, and under the action of the ceramic sleeve's own gravity, the lower oilstone will bear greater cutting force, resulting in uneven wear of the oilstone; when vertical honing is used, the ceramic grinding chips are difficult to be effectively discharged, which can easily clog the oilstone pores, reduce grinding efficiency, aggravate frictional heat, and scratch the processed surface.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: The present invention provides a ceramic sleeve inner hole grinding device based on an ultrasonic vibration auxiliary structure, comprising: A machine base with a workbench, a support plate fixedly connected to the machine base is installed at the lower end of the workbench, a connecting sleeve is provided under the main shaft of the machine base, the lower end of the connecting sleeve is clamped with the honing head body, the machine base and the connecting sleeve are jointly provided with an ultrasonic vibrating part, and the machine base, workbench and support plate are respectively jointly provided with a clamping part and a lifting buffer part; Among them, the clamping part includes an avoidance groove with a circular opening in the middle opened on the front side of the upper end of the supporting plate, and a gear ring is rotatably sleeved on the outer wall of the circular opening of the avoidance groove. A plurality of clamping groups are arranged above the workbench, and the clamping group includes two upper and lower clamping plates arranged above the workbench. A support rod is installed at the lower end of the lower clamping plate, and an extension group is commonly provided on each of the upper and lower clamping plates; Among them, the lifting and buffering part includes a placement cavity jointly opened at the upper end of the workbench and the pallet, a slide is slidably installed on the inner wall of the placement cavity, a plurality of pads evenly distributed in a circle are installed on the upper end of the slide, and mounting plate one and mounting plate two are respectively arranged on the lower side of the pallet, and a buffer group is arranged on the slide.

[0006] Furthermore, the ultrasonic vibration part includes a transducer located at the lower end of the main shaft of the machine base and fixedly connected by a flange. The lower end of the transducer is threadedly connected to a variable amplitude rod, and the lower end of the variable amplitude rod is threadedly connected to the connecting sleeve rod, and a slip ring is provided on the upper side of the transducer. The slip ring consists of a fixed ring on the upper side and a rotating ring on the lower side. The fixed ring of the slip ring is fixedly connected to the machine base, and the rotating ring of the slip ring is rotatably sleeved on the main shaft of the machine base.

[0007] Furthermore, the buffer group includes a plurality of arc-shaped holes opened at the upper end of the slide, the plurality of arc-shaped holes are evenly distributed circumferentially, and a buffer tube is slidably installed on the inner walls of the plurality of arc-shaped holes. An annular slide is installed at the bottom end of the buffer tube, and a receiving groove is opened at the bottom end of the slide corresponding to the annular slide. The upper end of the annular slide is connected to the inner wall of the receiving groove through a tension spring, and a plurality of nozzles evenly distributed circumferentially are also opened at the upper end of the slide located on the inner side of the buffer tube.

[0008] Furthermore, a plurality of waist-shaped grooves are provided on the upper end of the slide, and a top plate is installed on the upper end of the slide corresponding to the plurality of waist-shaped grooves. A plurality of connecting plates are installed on the upper end of the second mounting plate and are respectively fixedly connected to the corresponding top plates. An avoidance sliding hole is provided on the bottom end of the support plate and the corresponding connecting plates on the first mounting plate. The outer walls of the plurality of connecting plates are movably fitted on the inner walls of the corresponding avoidance sliding holes. A plurality of connecting columns evenly distributed around the circumference are installed on the upper end of the first mounting plate, and the upper ends of the plurality of connecting columns are fixedly connected to the slide.

[0009] Furthermore, the extension group includes circular slides that are symmetrically opened at the opposite ends of the upper and lower clamping plates. A connecting slide rod is slidably installed on the inner walls of the upper and lower circular slides on the same side. A tension spring is sleeved on the outer wall of the connecting slide rod located between the upper and lower clamping plates. An installation slide groove is also opened in the middle of the opposite ends of the upper and lower clamping plates, and a reinforcement slide plate is slidably installed on the inner walls of the upper and lower installation slides.

[0010] Furthermore, a plurality of guide holes evenly distributed in a circle are provided at the upper end of the gear ring, and limiting sliding holes are provided on the upper ends of the workbench and the support plate corresponding to the plurality of guide holes, and the outer wall of the support rod slides simultaneously onto the inner wall of the corresponding guide hole and the limiting sliding hole.

[0011] Furthermore, the lifting buffer part also includes a secondary cylinder installed through the bottom end of the machine base, the first telescopic end of the secondary cylinder is fixedly connected to the mounting plate one, and the second telescopic end of the secondary cylinder is fixedly connected to the mounting plate two.

[0012] Furthermore, a servo motor is mounted on the upper end of the base of the machine base via a mounting base, and an output shaft of the servo motor is fixedly connected to a gear meshing with the gear ring.

[0013] Furthermore, vertical plates are symmetrically installed on the upper end of the workbench, a honing liquid nozzle for spraying honing liquid is installed on the upper end of the vertical plates, and a discharge hole connected to the placement cavity is opened at the right end of the workbench.

[0014] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: The present invention provides a ceramic sleeve inner hole grinding device based on an ultrasonic vibration assisted structure. When the honing head enters, the honing head body is controlled to be carefully sent into the ceramic sleeve and positioned at a position corresponding to the buffer tube on the bottom side of the inner hole of the ceramic sleeve. Then, all the oilstones are controlled to lightly contact the inner wall of the buffer tube and reach a preset initial contact pressure. Multiple oilstones will jointly squeeze the buffer tube to move it downward. At this time, multiple oilstones will slide from the inner wall of the buffer tube to the inner wall of the ceramic sleeve. The buffer tube can absorb instantaneous impact energy and convert it into a relatively gentle force acting on the inner wall of the ceramic sleeve, effectively avoiding the impact force during initial contact and rapid establishment of grinding force, which will cause the ceramic sleeve to crack.

[0015] The main shaft of the machine base is controlled to rotate and reciprocate up and down, and the transducer and amplitude rod are controlled to start working, so as to achieve the effect of honing the inner hole of the ceramic sleeve. During this period, the connecting sleeve rod will drive the honing head body to vibrate ultrasonically. The ultrasonic high-frequency vibration can make the oilstone abrasive particles intermittently contact the workpiece. The ultrasonic vibration separation effect can effectively reduce the average grinding force and avoid the accumulation of pressure on the inner wall of the ceramic sleeve. In combination with the honing fluid, the grinding chips can be driven to separate in time, the surface of the oilstone can be cleaned to reduce the adhesion and clogging of grinding chips. The ultrasonic high frequency breaks the natural frequency during honing and can also suppress resonance to further avoid the problem of ceramic sleeve cracking. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure in an embodiment of the present invention.

[0018] Figure 2 Schematic diagram of the three-dimensional structure of the connecting sleeve rod, the honing head body and the ultrasonic vibration part in an embodiment of the present invention.

[0019] Figure 3 It is a structural schematic diagram of a three-dimensional partial cross-section of the clamping part and the lifting and buffering part in an embodiment of the present invention.

[0020] Figure 4 For the present invention Figure 3 Enlarged schematic diagram of the X in the middle.

[0021] Figure 5 This is a schematic diagram of the structure in which the workbench, the support plate and the clamping part are three-dimensionally separated in an embodiment of the present invention.

[0022] Figure 6 Schematic diagram of the structure in which the slide seat and the buffer group are three-dimensionally separated in an embodiment of the present invention.

[0023] Figure 7 Schematic diagram of the three-dimensional structure of the clamping part in an embodiment of the present invention.

[0024] Figure 8 It is a structural schematic diagram of a three-dimensional partial cross-section of a clamping plate in an embodiment of the present invention.

[0025] Figure 9 Schematic diagram of the three-dimensional structure of the clamping plate in an embodiment of the present invention.

[0026] Figure 10 It is a schematic diagram of the three-dimensional working state transformation structure of the clamping part and the lifting buffer part in an embodiment of the present invention.

[0027] The numbers in the figure represent: 1. machine base; 2. workbench; 3. support plate; 4. connecting sleeve rod; 5. honing head body; 6. ultrasonic vibration part; 61. transducer; 62. amplitude rod; 63. merge ring; 7. clamping part; 71. gear ring; 711. gear; 712. servo motor; 72. clamping plate; 73. support rod; 74. extension group; 741. connecting slide rod; 742. reinforcement slide; 8. lifting buffer part; 81. slide; 811. top plate; 82. pad; 83. buffer group; 831. buffer tube; 832. annular slide; 84. secondary cylinder; 85. mounting plate one; 851. connecting column; 86. mounting plate two; 861. connecting plate; 9. vertical plate; 91. honing liquid nozzle. DETAILED DESCRIPTION

[0028] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings 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 making any creative efforts shall fall within the scope of protection of the present invention.

[0029] The present invention will be further described below with reference to the embodiments.

[0030] Example: See also Figures 1-10 The present invention provides a technical solution: a ceramic casing inner hole grinding device based on an ultrasonic vibration auxiliary structure, comprising: A machine base 1 with a workbench 2, a support plate 3 fixedly connected to the machine base 1 is installed at the lower end of the workbench 2, a connecting rod 4 is provided below the main shaft of the machine base 1, and a honing head body 5 is clamped at the lower end of the connecting rod 4, an ultrasonic vibrating part 6 is provided on the machine base 1 and the connecting rod 4, and a clamping part 7 and a lifting buffer part 8 are provided on the machine base 1, the workbench 2 and the support plate 3 respectively. Among them, the clamping part 7 includes an avoidance groove with a circular opening in the middle opened on the front side of the upper end of the supporting plate 3, and a gear ring 71 is rotatably sleeved on the outer wall of the circular opening of the avoidance groove. A plurality of clamping groups are provided above the workbench 2, and the clamping group includes two upper and lower clamping plates 72 provided above the workbench 2. The arc-shaped clamping end surface of the clamping plate 72 is a flexible rubber structure. A support rod 73 is installed at the lower end of the lower clamping plate 72, and an extension group 74 is provided on each upper and lower clamping plates 72. Among them, the lifting buffer part 8 includes a placement cavity jointly opened at the upper end of the workbench 2 and the support plate 3, a slide 81 is slidably installed on the inner wall of the placement cavity, a circular opening is left in the middle of the slide 81, and a plurality of pads 82 evenly distributed in a circle are installed on the upper end of the slide 81. The lower side of the support plate 3 is respectively provided with a mounting plate 1 85 and a mounting plate 2 86, and a buffer group 83 is provided on the slide 81.

[0031] The ultrasonic vibration part 6 includes a transducer 61 located at the lower end of the main shaft of the machine base 1 and fixedly connected by a flange. The lower end of the transducer 61 is threadedly connected to a variable amplitude rod 62, and the lower end of the variable amplitude rod 62 is threadedly connected to the connecting sleeve rod 4, and a slip ring 63 is provided on the upper side of the transducer 61. The slip ring 63 consists of a fixed ring on the upper side and a rotating ring on the lower side. The fixed ring of the slip ring 63 is fixedly connected to the machine base 1, and the rotating ring of the slip ring 63 is rotatably sleeved on the main shaft of the machine base 1.

[0032] The buffer group 83 includes a plurality of arc-shaped holes opened at the upper end of the slide 81, and the plurality of arc-shaped holes are evenly distributed around the circumference, and a buffer tube 831 is slidably installed on the inner walls of the plurality of arc-shaped holes. The upper end of the buffer tube 831 is an arc-shaped buffer structure, and an annular slide 832 is installed at the bottom end of the buffer tube 831. A receiving groove is opened at the bottom end of the slide 81 corresponding to the annular slide 832, and the upper end of the annular slide 832 is connected to the inner wall of the receiving groove through a tension spring, and a plurality of nozzles evenly distributed around the circumference are also opened at the upper end of the slide 81 located inside the buffer tube 831.

[0033] A plurality of waist-shaped grooves are provided on the upper end of the slide 81, and the corresponding waist-shaped grooves on the upper end of the slide 81 are all slid through and installed with a top plate 811. The upper end of the top plate 811 is a strong magnetic structure. A plurality of connecting plates 861 are installed on the upper end of the mounting disk 2 86, which are respectively fixedly connected to the corresponding top plates 811. The bottom end of the support plate 3 and the corresponding connecting plates 861 on the mounting disk 1 85 are jointly provided with avoidance sliding holes. The outer walls of the plurality of connecting plates 861 are movably fitted on the inner walls of the corresponding avoidance sliding holes. The upper end of the mounting disk 1 85 is installed with a plurality of connecting columns 851 evenly distributed around the circumference, and the upper ends of the plurality of connecting columns 851 are all fixedly connected to the slide 81.

[0034] The extension group 74 includes circular slides that are symmetrically arranged at the opposite ends of the upper and lower clamping plates 72. A connecting slide bar 741 is slidably installed on the inner walls of the upper and lower circular slides on the same side. A tension spring is sleeved on the outer wall of the connecting slide bar 741 located between the upper and lower clamping plates 72. An installation slide groove is also provided in the middle of the opposite ends of the upper and lower clamping plates 72. A reinforcing slide plate 742 is slidably installed on the inner walls of the upper and lower installation slides. An electromagnet is embedded in the upper end of the lower clamping plate 72, and the lower ends of the upper and lower clamping plates 72 are both strong magnetic structures.

[0035] The upper end of the gear ring 71 is provided with multiple guide holes evenly distributed around the circumference, and the upper ends of the workbench 2 and the support plate 3 are provided with limiting sliding holes corresponding to the multiple guide holes. The outer wall of the support rod 73 slides and fits on the corresponding inner wall of the guide hole and the limiting sliding hole at the same time.

[0036] The lifting buffer part 8 also includes a secondary cylinder 84 installed through the bottom end of the machine base 1. The primary telescopic end of the secondary cylinder 84 is fixedly connected to the mounting plate 1 85, and the secondary telescopic end of the secondary cylinder 84 is fixedly connected to the mounting plate 2 86.

[0037] A servo motor 712 is mounted on the upper end of the base of the machine base 1 via a mounting base. The output shaft of the servo motor 712 is fixedly connected to a gear 711 meshing with the gear ring 71 .

[0038] Vertical plates 9 are symmetrically installed on the upper end of the workbench 2. A honing liquid nozzle 91 for spraying honing liquid is installed on the upper end of the vertical plates 9, and a discharge hole connected to the placement cavity is opened at the right end of the workbench 2.

[0039] When implementing: First, the clamping part 7 in the present application adopts a flexible concentric clamping method. Under the action of the tension spring, each upper and lower clamping plates 72 are initially close to each other. At this time, the upper and lower ends of the multiple connecting slides 741 are respectively located in the corresponding circular slide grooves, and the upper and lower ends of the reinforcement slide 742 are also located in the corresponding installation slide grooves, and the multiple clamping plates 72 are initially located in the corresponding limiting slide holes, respectively. The upper end surfaces of the upper multiple clamping plates 72 are initially flush with the upper end surface of the workbench 2. In addition, the honing head body 5 is initially located at the highest point of the honing work, and the slide seat 81 is initially located at the bottom end of the placement cavity. At this time, the multiple clamping plates 72 and the honing head body 5 will not hinder the placement of the ceramic sleeve.

[0040] During loading, the ceramic sleeve that needs inner hole grinding is first placed roughly on the middle position of the multiple pads 82 in the placement cavity by the external loading equipment, so that the outer wall of the buffer tube 831 is tightly fitted on the inner wall of the ceramic sleeve. If the ceramic sleeve is not placed in the center, the lower end of the ceramic sleeve will squeeze the buffer tube 831 to retract it downward. Then, the servo motor 712 controls the gear 711 to rotate, and the gear 711 will drive the gear ring 71 to rotate. Under the cooperation of the multiple guide holes and the limit sliding holes, the multiple support rods 73 will all move along the guide holes and the limit sliding holes. When the cam 72 is in the closed position, the locking cam 73 is in the closed position, and the locking cam 73 is in the closed position, so that the cam 72 can be locked.

[0041] When the multiple clamping plates 72 approach each other synchronously along the corresponding limit sliding holes and move to a distance above the slide 81, and do not completely clamp the ceramic sleeve, it should be noted that the upper end surfaces of the multiple top plates 811 are initially flush with the upper end surface of the slide 81, and the first-level telescopic section and the second-level telescopic section of the control-secondary cylinder 84 are extended in sequence, which will drive the mounting plate 1 85 and the mounting plate 2 86 to move upward in sequence, and the mounting plate 1 85 will drive the slide 81 upward through multiple connecting columns 851, and the slide 81 will drive the ceramic sleeve to move upward synchronously through multiple pads 82 until the lower end surface of the ceramic sleeve is flush with the upper end surface of the workbench 2, and the mounting plate 2 86 will drive the corresponding top plates 811 to move upward synchronously through multiple connecting plates 861. During the movement, the upper end surfaces of the multiple top plates 811 will be magnetically connected to the corresponding clamping plates 72, and continue to drive the corresponding clamping plates 72 to move upward until each upper and lower clamping plates 72 are synchronously moved upward to the appropriate position. At this time, each upper and lower clamping plates 72 are far away from each other and are respectively located on the upper and lower sides of the ceramic sleeve, which is beneficial to the stable centering and clamping of the ceramic sleeve, and avoids clamping only one side of the ceramic sleeve, which makes the ceramic sleeve easily affected by the lateral force and resonates during honing, and further causes the ceramic sleeve to bend and crack. It is more suitable for high vibration and high impact environments, and because the arc-shaped clamping end surface of the clamping plate 72 adopts a flexible rubber structure, it can also avoid damage to the ceramic sleeve when clamping it.

[0042] As the servo motor 712 controls the gear 711 to continue rotating, the multiple clamping plates 72 will jointly contact the outer wall of the ceramic sleeve. Even if the ceramic sleeve is not placed in the exact center, the multiple clamping plates 72 will jointly correct its center and jointly perform concentric clamping on the ceramic sleeve. At this time, under the action of the tension spring, the buffer tube 831 will also move upward, so that the outer wall of the buffer tube 831 is tightly fitted on the inner wall of the ceramic sleeve. When the multiple clamping plates 72 jointly clamp the ceramic sleeve, the servo motor 712 is controlled to stop working.

[0043] When the honing head enters, it should be noted that the machine base 1 is provided with a spindle lifting drive and a honing head body 5 expansion mechanism. Since they are all existing technologies, they will not be described in detail here. First, the spindle lifting drive provided in the machine base 1 is used to control the honing head body 5 to be carefully sent into the ceramic sleeve and positioned at the bottom side of the inner hole of the ceramic sleeve corresponding to the buffer tube 831. Then, the honing head body 5 expansion mechanism provided in the machine base 1 is controlled so that the multiple oilstones on the honing head body 5 expand outward smoothly and evenly from the bottom side. It should also be noted that the honing head body 5 can also adopt a double-feed honing head. At this time, the multiple oilstones on the honing head body 5 are controlled in stages. The coarse oilstones and fine oilstones expand outward smoothly and evenly from the bottom to perform coarse honing and fine honing until all the oilstones lightly contact the inner wall of the buffer tube 831 and reach the preset initial contact pressure. During this period, as the multiple oilstones on the honing head body 5 expand outward evenly, they will jointly squeeze the buffer tube 831 and move it downward. At this time, the multiple oilstones will slide from the inner wall of the buffer tube 831 to the inner wall of the ceramic sleeve. The buffer tube 831 can absorb the instantaneous impact energy and convert it into a relatively gentle force acting on the inner wall of the ceramic sleeve, effectively avoiding the impact force during initial contact and rapid establishment of grinding force, which may cause the ceramic sleeve to crack.

[0044] During honing, after the oilstone is in uniform contact and a stable guide is established, it should be noted that the two honing liquid nozzles 91 and the multiple nozzles on the slide 81 are all connected to a honing liquid delivery device. While controlling the left and right honing liquid nozzles 91 to spray the honing liquid from top to bottom into the ceramic sleeve, the multiple nozzles on the slide 81 are controlled to spray the honing liquid from bottom to top into the ceramic sleeve. During subsequent honing, the honing liquid will be carried away by strong flushing to remove the grinding chips from the inner wall of the ceramic sleeve in time, and drip from the circular port on the slide 81 to the bottom of the placement cavity, and be extracted by an external vacuum pump for centralized treatment, effectively avoiding the problem of difficulty in effectively supplying the honing liquid to the inner wall of the ceramic sleeve and difficulty in reaching the grinding area.

[0045] Then control the main shaft rotation and up and down reciprocating motion of the machine base 1. At the same time, it should be noted that the transducer 61 is connected to the rotating ring of the merge ring 63 through an electric wire, and the transducer 61 and the amplitude rod 62 are controlled to start working. During this period, the main shaft of the machine base 1 will drive the connecting sleeve rod 4 to rotate synchronously through the transducer 61 and the amplitude rod 62, and the connecting sleeve rod 4 will drive the honing head body 5 to rotate synchronously. At this time, the honing head body 5 will move back and forth along the inner wall of the ceramic sleeve while continuing to rotate. During this period, under the action of the tension spring, the buffer tube 831 will slide back and forth synchronously up and down under the action of the squeezing or separation of the lower end of the honing head. The vibration separation effect of the ultrasonic wave can effectively reduce the average grinding force, avoid the accumulation of pressure on the inner wall of the ceramic sleeve, and cooperate with the honing fluid to drive the grinding chips to separate in time, clean the surface of the oilstone and reduce the adhesion and clogging of the grinding chips. The ultrasonic high frequency breaks the natural frequency during honing and can also suppress the resonance to further avoid the problem of ceramic sleeve cracking.

[0046] After honing is completed, the expansion mechanism of the honing head body 5 provided in the control machine base 1 is controlled so that the multiple oilstones on the honing head body 5 begin to retract inward smoothly and evenly to restore to their original positions. Then, the main shaft lifting drive provided in the machine base 1 is used to control the honing head body 5 to carefully withdraw from the ceramic sleeve and restore to its original position. Then, the servo motor 712 is used to control the gear 711 to rotate in the opposite direction. The multiple clamping plates 72 will synchronously move away from each other along the corresponding limit sliding holes to restore to their original positions. During this period, the electromagnet is controlled to stop working. Under the action of the tension spring, every two clamping plates 72 will move closer to each other and restore to their original positions until the upper end surfaces of the multiple clamping plates 72 on the upper side are flush with the upper end surface of the workbench 2 again and restore to their original positions. In addition, the first-stage telescopic section and The secondary telescopic sections retract and return to their original positions in sequence, which will drive the mounting plate 1 85 and the mounting plate 2 86 to move downward in sequence and return to their original positions. At this time, the upper end surfaces of the multiple top plates 811 will all be flush with the upper end surface of the slide 81 and return to their original positions. The slide 81 will also drive the ceramic sleeve to move downward synchronously to the bottom of the placement cavity through the multiple pads 82 and return to its original position. Finally, the ceramic sleeve with the inner hole ground can be taken out by the external material-retrieving equipment. The loading and unloading of the ceramic sleeve is convenient and unobstructed. When the ceramic sleeve follows the multiple pads 82 to retract into the placement cavity, the buffer tube 831 will assist in stabilizing the ceramic sleeve after losing the clamping of the multiple clamping plates 72, so as to avoid the shaking caused by the descent process, the skew collision and further damage such as cracking.

[0047] In summary, this application has the following advantages: Advantage 1: When loading, the gear 711 is controlled to rotate by the servo motor 712, and the first telescopic section and the second telescopic section of the second-stage cylinder 84 are extended in sequence, so that each upper and lower clamping plates 72 are far away from each other and are respectively located on the upper and lower sides of the ceramic sleeve, which is conducive to the stable centering and clamping of the ceramic sleeve, and avoids clamping only one side of the ceramic sleeve, which makes the ceramic sleeve easily affected by the lateral force during honing and resonates, further causing the ceramic sleeve to bend and crack. It is more suitable for high vibration and high impact environments, and because the arc-shaped clamping end face of the clamping plate 72 adopts a flexible rubber structure, it can also avoid damage to the ceramic sleeve when clamping it.

[0048] Advantage 2: As the servo motor 712 controls the gear 711 to continue rotating, the multiple clamping plates 72 will jointly contact the outer wall of the ceramic sleeve. Even if the ceramic sleeve is not placed in the exact center, the multiple clamping plates 72 will jointly correct its center and jointly perform concentric clamping on the ceramic sleeve. The buffer tube 831 will also move upward, so that the outer wall of the buffer tube 831 is tightly fitted to the inner wall of the ceramic sleeve.

[0049] Advantage three, when the honing head enters, the honing head body 5 is controlled to be carefully sent into the ceramic sleeve and positioned at the position corresponding to the buffer tube 831 on the bottom side of the inner hole of the ceramic sleeve, and then all the oilstones are controlled to lightly contact the inner wall of the buffer tube 831 and reach the preset initial contact pressure. Multiple oilstones will jointly squeeze the buffer tube 831 to move it downward. At this time, multiple oilstones will slide from the inner wall of the buffer tube 831 to the inner wall of the ceramic sleeve. The buffer tube 831 can absorb the instantaneous impact energy and convert it into a relatively gentle force acting on the inner wall of the ceramic sleeve, effectively avoiding the impact force during initial contact and rapid establishment of grinding force, which will cause the ceramic sleeve to crack.

[0050] Advantage four: during honing, the left and right honing liquid nozzles 91 are controlled to spray the honing liquid from top to bottom into the ceramic sleeve, while the multiple nozzles on the slide 81 are controlled to spray the honing liquid from bottom to top into the ceramic sleeve. During subsequent honing, the honing liquid will be carried away by strong flushing to remove the grinding chips from the inner wall of the ceramic sleeve in time, and will drip from the circular port on the slide 81 to the bottom of the placement cavity, and will be extracted by an external vacuum pump for centralized treatment, effectively avoiding the problem of difficulty in effectively supplying the honing liquid to the inner wall of the ceramic sleeve and difficulty in reaching the grinding area.

[0051] Advantage five, the main shaft rotation and up and down reciprocating motion of the machine base 1 are controlled, and the transducer 61 and the amplitude rod 62 are controlled to start working at the same time, so as to achieve the effect of honing the inner hole of the ceramic sleeve. During this period, the connecting sleeve rod 4 will drive the honing head body 5 to perform ultrasonic vibration. The ultrasonic high-frequency vibration can make the oilstone abrasive particles intermittently contact the workpiece. The ultrasonic vibration separation effect can effectively reduce the average grinding force and avoid the accumulation of pressure on the inner wall of the ceramic sleeve. In combination with the honing fluid, the grinding chips can be driven to separate in time, clean the surface of the oilstone and reduce the adhesion and clogging of grinding chips. The ultrasonic high frequency breaks the natural frequency during honing, and can also suppress resonance to further avoid the problem of ceramic sleeve cracking.

[0052] Advantage six: after honing is completed, the clamping part 7 and the lifting buffer part 8 are controlled to return to their original positions in turn, and finally the ceramic sleeve with the inner hole grinding is taken out by the external material taking equipment. The loading and unloading of the ceramic sleeve is convenient and unobstructed. When the ceramic sleeve follows the multiple pads 82 to retract and place in the cavity, the buffer tube 831 will assist in stabilizing the ceramic sleeve after losing the clamping of the multiple clamping plates 72, avoiding the shaking caused by the descent process, the skew collision and further damage such as cracking.

[0053] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A ceramic casing inner hole grinding device based on an ultrasonic vibration assisted structure, characterized in that: include: A machine base (1) with a workbench (2), a support plate (3) fixedly connected to the machine base (1) is installed at the lower end of the workbench (2), a connecting sleeve rod (4) is provided below the main shaft of the machine base (1), a honing head body (5) is clamped at the lower end of the connecting sleeve rod (4), an ultrasonic vibration part (6) is provided on the machine base (1) and the connecting sleeve rod (4), and a clamping part (7) and a lifting buffer part (8) are provided on the machine base (1), the workbench (2) and the support plate (3) respectively. The clamping portion (7) includes an avoidance groove with a circular opening in the middle portion opened on the front side of the upper end of the support plate (3), a gear ring (71) is rotatably provided on the outer wall of the circular opening of the avoidance groove, and a plurality of clamping groups are provided above the workbench (2), the clamping group includes two upper and lower clamping plates (72) provided above the workbench (2), a support rod (73) is installed at the lower end of the lower clamping plate (72), and an extension group (74) is provided on each of the upper and lower clamping plates (72); The lifting buffer portion (8) includes a placement cavity jointly opened at the upper ends of the workbench (2) and the support plate (3), a slide seat (81) is slidably mounted on the inner wall of the placement cavity, a plurality of pads (82) evenly distributed in a circumference are mounted on the upper end of the slide seat (81), a mounting plate 1 (85) and a mounting plate 2 (86) are respectively arranged on the lower side of the support plate (3), and a buffer group (83) is arranged on the slide seat (81).

2. The ceramic casing inner hole grinding device based on the ultrasonic vibration assisted structure according to claim 1 is characterized in that: The ultrasonic vibration part (6) includes a transducer (61) fixedly connected to the lower end of the main shaft of the machine base (1) through a flange, the lower end of the transducer (61) is threadedly connected to a variable amplitude rod (62), the lower end of the variable amplitude rod (62) is threadedly connected to the connecting sleeve rod (4), and a collector ring (63) is provided on the upper side of the transducer (61), the collector ring (63) is composed of an upper fixed ring and a lower rotating ring, the fixed ring of the collector ring (63) is fixedly connected to the machine base (1), and the rotating ring of the collector ring (63) is rotatably sleeved on the main shaft of the machine base (1).

3. The ceramic casing inner hole grinding device based on ultrasonic vibration auxiliary structure according to claim 1 is characterized in that: The buffer group (83) includes a plurality of arc-shaped holes opened at the upper end of the slide (81), the plurality of arc-shaped holes are evenly distributed around the circumference, and a buffer tube (831) is slidably mounted on the inner walls of the plurality of arc-shaped holes. An annular slide (832) is mounted at the bottom end of the buffer tube (831), and a receiving groove is opened at the bottom end of the slide (81) corresponding to the annular slide (832). The upper end of the annular slide (832) is connected to the inner wall of the receiving groove through a tension spring, and the upper end of the slide (81) is located inside the buffer tube (831) and is also provided with a plurality of nozzles evenly distributed around the circumference.

4. The ceramic sleeve inner hole grinding device based on the ultrasonic vibration assisted structure according to claim 3 is characterized in that: The upper end of the slide (81) is provided with a plurality of waist-shaped grooves, and the upper end of the slide (81) is provided with a top plate (811) that slides through the corresponding waist-shaped grooves. The upper end of the second mounting plate (86) is provided with a plurality of connecting plates (861) that are respectively fixedly connected to the corresponding top plates (811). The bottom end of the support plate (3) and the corresponding connecting plates (861) on the first mounting plate (85) are provided with avoidance sliding holes. The outer walls of the plurality of connecting plates (861) are respectively movably fitted on the inner walls of the corresponding avoidance sliding holes. The upper end of the first mounting plate (85) is provided with a plurality of connecting columns (851) that are evenly distributed around the circumference, and the upper ends of the plurality of connecting columns (851) are all fixedly connected to the slide (81).

5. The ceramic casing inner hole grinding device based on ultrasonic vibration auxiliary structure according to claim 1 is characterized in that: The stretching group (74) includes circular chutes that are symmetrically opened at the opposite ends of the upper and lower clamping plates (72), and a connecting slide bar (741) is slidably installed on the inner walls of the upper and lower circular chutes on the same side. A tension spring is sleeved on the outer wall of the connecting slide bar (741) located between the upper and lower clamping plates (72). An installation chute is also opened in the middle of the opposite ends of the upper and lower clamping plates (72), and a reinforcement slide plate (742) is slidably installed on the inner walls of the upper and lower installation chute.

6. The ceramic sleeve inner hole grinding device based on ultrasonic vibration auxiliary structure according to claim 1 is characterized in that: The upper end of the gear ring (71) is provided with a plurality of guide holes evenly distributed around the circumference, and the upper ends of the workbench (2) and the support plate (3) are provided with limit sliding holes corresponding to the plurality of guide holes, and the outer wall of the support rod (73) is simultaneously slidably fitted on the inner wall of the corresponding guide hole and the limit sliding hole.

7. The ceramic casing inner hole grinding device based on ultrasonic vibration auxiliary structure according to claim 1 is characterized in that: The lifting buffer portion (8) further includes a secondary cylinder (84) installed through the bottom end of the machine base (1), wherein the primary telescopic end of the secondary cylinder (84) is fixedly connected to the first mounting plate (85), and the secondary telescopic end of the secondary cylinder (84) is fixedly connected to the second mounting plate (86).

8. The ceramic casing inner hole grinding device based on ultrasonic vibration auxiliary structure according to claim 7 is characterized in that: A servo motor (712) is mounted on the upper end of the base of the machine base (1) via a mounting base, and an output shaft of the servo motor (712) is fixedly connected to a gear (711) meshing with the gear ring (71).

9. The ceramic casing inner hole grinding device based on ultrasonic vibration auxiliary structure according to claim 1, characterized in that: Vertical plates (9) are symmetrically mounted on the upper end of the workbench (2), a honing liquid nozzle (91) for spraying honing liquid is mounted on the upper end of the vertical plate (9), and a discharge hole connected to the placement cavity is opened at the right end of the workbench (2).

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