Grinding automated floating fixture device

Abstract

The application discloses a kind of grinding automation floating clamp device, including top, transition disc, rotary joint, pneumatic clamping mechanism;The top is fixed top, it includes headstock top and tailstock top, the headstock top is installed on machine tool headstock, the tailstock top is installed on machine tool tailstock;The transition disc is connected with machine tool headstock main shaft, the rotary joint is covered outside headstock top, and the rotating part of rotary joint one end is fixedly connected with transition disc;The pneumatic clamping mechanism is connected with the rotating part of rotary joint other end, and pneumatic clamping mechanism can be integrally floated relative to rotary joint;Gas path is equipped on the rotary joint, and gas path supplies gas to pneumatic clamping mechanism, so that pneumatic clamping mechanism is clamped to the workpiece supported between headstock top and tailstock top.The application uses dead top to position workpiece, and the whole floating design of pneumatic clamping mechanism can improve the precision of external cylindrical grinding automation processing, to realize the ultra-precision grinding of workpiece.

Description

Technical Field

[0001] This invention relates to the field of external cylindrical grinding technology, and more specifically to an automated floating fixture device for grinding. Background Technology

[0002] External cylindrical grinding is one of the key processes for ensuring workpiece accuracy and surface quality. Currently, most conventional automated external cylindrical grinding fixtures adopt a "live center" design. The roundness of the machined workpiece is limited by the rotational accuracy of the fixture itself, making it difficult to achieve very high precision, generally only 0.003mm. Some fixtures also use a "dead center" design. However, because the fixture cannot be in a completely floating state during machining, it pushes the workpiece away from the center of rotation during machining and clamping, resulting in low roundness accuracy and failing to meet the requirements of ultra-precision grinding. Summary of the Invention

[0003] The purpose of this invention is to address the problem that the automatic fixtures used in current automated external cylindrical grinding processes have low machining accuracy and cannot achieve automated grinding of high-precision parts. This invention provides an automated floating fixture device for grinding, which is beneficial to improving the machining accuracy of automated external cylindrical grinding and can achieve ultra-precision grinding of parts during the automated grinding process.

[0004] This invention is achieved through the following technical solution: This invention provides an automated floating fixture device for grinding, including a center, a transition plate, a rotary joint, and a pneumatic clamping mechanism; the center is a fixed center, which includes a headstock center and a tailstock center, the headstock center is mounted on the machine tool headstock, and the tailstock center is mounted on the machine tool tailstock; The transition plate is connected to the headstock spindle of the machine tool, the rotary joint is sleeved on the top of the headstock, and one end of the rotating part of the rotary joint is fixedly connected to the transition plate; the pneumatic clamping mechanism is connected to the other end of the rotating part of the rotary joint, and the pneumatic clamping mechanism can float as a whole relative to the rotary joint. The rotary joint is provided with an air passage, which is used to supply air to the pneumatic clamping mechanism so that the pneumatic clamping mechanism clamps the workpiece supported between the headstock tip and the tailstock tip.

[0005] As a further embodiment of the present invention, the rotary joint includes a housing, a rotating shaft and a connecting plate. The two ends of the rotating shaft are fixedly connected to the transition plate and the connecting plate, respectively. The housing is sleeved on the rotating shaft and a slewing bearing is formed between the two. The pneumatic clamping mechanism is floatingly connected to the connecting plate.

[0006] As a further embodiment of the present invention, the pneumatic clamping mechanism includes a movable seat and clamping cylinders; one end of the movable seat is provided with a positioning plate, the positioning plate is fitted into a positioning hole opened on the connecting plate, and the positioning plate has a floating amount in both the radial and axial directions relative to the positioning hole; multiple clamping cylinders are symmetrically arranged on the movable seat for clamping the workpiece.

[0007] As a further embodiment of the present invention, the piston rod of the clamping cylinder extends into the inner cavity of the movable seat, and a V-shaped clamping block is provided at the end of the piston rod.

[0008] As a further embodiment of the present invention, the positioning disk is provided with a lever, which is inserted into a toggle hole opened on the connecting plate.

[0009] As a further embodiment of the present invention, an end cap is installed at one end of the connecting plate, and the end cap is sleeved outside the movable seat and restricts the positioning plate within the positioning hole.

[0010] As a further aspect of the present invention, the radial float of the positioning disk relative to the positioning hole is 0.5mm-1mm, and the axial float is less than 0.5mm.

[0011] As a further embodiment of the present invention, the outer circles at both ends of the rotating shaft form a slewing bearing with the inner wall of the housing through precision bearings.

[0012] As a further embodiment of the present invention, the air passage includes an air inlet chamber and an air guide passage; the air inlet chamber includes an annular groove disposed opposite to the inner wall of the outer casing and the outer wall of the rotating shaft, the outer casing is provided with an air inlet hole communicating with the air inlet chamber, and a sealing ring is also provided between the outer casing and the rotating shaft, the sealing ring having two rings and being located on both sides of the air inlet chamber respectively; The air passage includes a first air passage located inside the rotating shaft and a second air passage located inside the connecting plate. The first air passage is connected to the air intake chamber and the second air passage is connected to the second air passage through an air pipe.

[0013] As a further embodiment of the present invention, the first airway includes a connected radial section and an axial section, one end of the radial section of the first airway penetrates the outer wall of the rotating shaft and communicates with the air inlet chamber; the second airway includes a connected radial section and an axial section, one end of the axial section of the second airway communicates with one end of the axial section of the first airway, and one end of the radial section of the second airway penetrates the outer wall of the connecting plate and communicates with the air pipe.

[0014] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. In this invention, the workpiece is positioned using a "dead center", which does not rotate with the fixture. The positioning and repeat positioning accuracy is high, and the accuracy can be controlled within 0.001mm, which can effectively reduce the problem of parts not meeting the accuracy standards due to positioning errors. 2. In this invention, clamping and positioning are separated, and the clamping part is a floating design. The fixture can automatically follow the rotation of the workpiece center during clamping and grinding, and will not push the workpiece away from the center, causing the roundness to exceed the tolerance. During the processing, the roundness error can be effectively controlled within 0.001mm. 3. The pneumatic clamping mechanism in this invention can be controlled by a program to achieve automatic clamping and loosening of workpieces, and can realize automated grinding of ultra-precision parts. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort. In the drawings: Figure 1 This is a cross-sectional view of the automated grinding floating fixture device of the present invention; Figure 2 This is a schematic diagram of the air passage on the rotary joint in this invention; Figure 3 This is a schematic diagram of the pneumatic clamping mechanism in this invention; Figure 4 This is a schematic diagram of the connecting plate in the present invention; Figure 5 This is a schematic diagram of the movable seat in this invention.

[0016] The attached diagram shows the markings and corresponding component names: 1-Transition plate, 2-Outer shell, 21-Sealing ring, 22-Air inlet, 3-Precision bearing, 4-Rotating shaft, 41-First air passage, 5-Connecting plate, 51-Positioning hole, 52-Actuating hole, 53-End cap, 54-Second air passage, 61-Headstock tip, 62-Tailstock tip, 7-Air inlet chamber, 8-Modible seat, 81-Positioning plate, 82-Actuating lever, 9-Clamping cylinder, 91-Air pipe, 92-V-shaped clamping block. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0019] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary and secondary relationship of the indicated technical features.

[0020] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0021] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A exists, A and B exist simultaneously, and B exists. In addition, the character " / " in this document generally indicates that the related objects before and after it have an "or" relationship.

[0022] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0023] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces), unless otherwise explicitly specified.

[0024] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0025] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0026] Please refer to Figures 1 to 5 The present application provides an automated floating fixture device for grinding, including a center, a transition plate 1, a rotary joint, and a pneumatic clamping mechanism; the center is a fixed center, which includes a headstock center 61 and a tailstock center 62, the headstock center 61 is mounted on the machine tool headstock, and the tailstock center 62 is mounted on the machine tool tailstock; The transition plate 1 is connected to the headstock spindle of the machine tool. The rotary joint is sleeved on the headstock tip 61, and one end of the rotating part of the rotary joint is fixedly connected to the transition plate 1. The pneumatic clamping mechanism is connected to the other end of the rotating part of the rotary joint, and the pneumatic clamping mechanism can float as a whole relative to the rotary joint. The rotary joint is provided with an air passage, which is used to supply air to the pneumatic clamping mechanism so that the pneumatic clamping mechanism clamps the workpiece supported between the headstock tip 61 and the tailstock tip 62.

[0027] In this application, the headstock center 61 is fixedly installed at the center of the machine tool headstock, and the tailstock center 62 is fixedly installed at the center of the machine tool tailstock. The headstock center 61 and the tailstock center 62 are arranged coaxially and both rest on the center holes at both ends of the workpiece to be ground. Moreover, both centers are dead centers, used for positioning the workpiece and do not rotate with the workpiece during the grinding process.

[0028] The aforementioned transition plate 1 is connected to the machine tool headstock spindle, serving to transmit the spindle's rotational kinetic energy. The aforementioned rotary joint includes a fixed part and a rotating part, wherein the fixed part can be connected to the machine tool's compressed air pipe 91 to introduce compressed air into the air path, thereby supplying air to the pneumatic clamping mechanism to achieve workpiece clamping and releasing.

[0029] One end of the rotating part of the rotary joint is fixedly connected to the transition plate 1, and the other end is connected to the pneumatic clamping mechanism, thereby transferring the rotational kinetic energy of the spindle to the pneumatic clamping mechanism. When the pneumatic clamping mechanism clamps the workpiece, it can further transfer the rotational kinetic energy of the spindle to the workpiece, so that the workpiece rotates with the spindle during grinding.

[0030] Since the workpiece in this application is positioned using two "dead centers" and connected to a pneumatic clamping mechanism via a rotary joint, the pneumatic clamping mechanism can be controlled by PLC program M code to achieve automatic clamping and release of the workpiece. Because the pneumatic clamping mechanism can float as a whole relative to the rotary joint, it can automatically adjust itself after clamping, preventing the workpiece from being pushed off the centerline due to clamping and thus avoiding serious impact on machining accuracy.

[0031] According to some embodiments of this application, the rotary joint includes a housing 2, a rotating shaft 4, and a connecting plate 5. The two ends of the rotating shaft 4 are fixedly connected to the transition plate 1 and the connecting plate 5, respectively. The housing 2 is sleeved on the rotating shaft 4 and a slewing bearing is formed between the two. The pneumatic clamping mechanism is floatingly connected to the connecting plate 5.

[0032] The aforementioned outer casing 2, rotating shaft 4, and connecting plate 5 are all annular in shape. The outer casing 2 is fitted onto the rotating shaft 4, and the two form a slewing bearing. This outer casing 2 is the fixed part of the rotary joint and can be connected to the machine tool compressed air pipe 91. The transition plate 1 is fixedly connected to one end of the rotating shaft 4 by bolts, and the connecting plate 5 is fixedly connected to the other end of the rotating shaft 4 by bolts. The aforementioned headstock tip 61 passes through the central channel of the transition plate 1, rotating shaft 4, and connecting plate 5 in sequence.

[0033] The rotating shaft 4 and the connecting plate 5 are the rotating parts of the rotary joint. Since the pneumatic clamping mechanism is floatingly connected to the connecting plate 5, the entire pneumatic clamping mechanism is connected to the rotating part of the rotary joint and rotates accordingly.

[0034] According to some embodiments of this application, the outer circles at both ends of the rotating shaft 4 form a slewing bearing with the inner wall of the housing 2 through precision bearings 3. Specifically, the rotating shaft 4 in this application has a structure that is thicker in the middle and thinner at both ends, and two precision bearings 3 are disposed at both ends of the rotating shaft 4 and are axially limited by shaft shoulders, etc.

[0035] The aforementioned precision bearing 3 is a key mechanical component with precision, performance and reliability far exceeding those of ordinary bearings. Its core lies in micron-level or even higher manufacturing precision, excellent material properties and strict consistency control. It is widely used in high-end equipment fields such as machine tools, robots, aerospace, and precision instruments.

[0036] According to some embodiments of this application, the pneumatic clamping mechanism includes a movable seat 8 and a clamping cylinder 9; one end of the movable seat 8 is provided with a positioning plate 81, which is fitted into a positioning hole 51 opened on the end face of the connecting plate 5, and the positioning plate 81 has a certain amount of floating in both the radial and axial directions relative to the positioning hole 51; there are multiple clamping cylinders 9 symmetrically arranged on the movable seat 8, which are used to clamp the workpiece.

[0037] There are two clamping cylinders 9, which are symmetrically fixedly mounted on the movable seat 8. The entire pneumatic clamping mechanism is floatingly connected to the connecting plate 5 through the movable seat 8. Specifically, the movable seat 8 can form a clearance fit with the positioning hole 51 opened at the end of the connecting plate 5 through the circular positioning plate 81 at one end, so that the movable seat 8 has a certain amount of floating in both the radial and axial directions relative to the connecting plate 5.

[0038] Because the pneumatic clamping mechanism and the connecting plate 5 are connected by a floating connection, they can automatically adjust themselves after clamping, and will not cause the workpiece to be pushed away from the center line due to clamping, thus seriously affecting the machining accuracy.

[0039] According to some embodiments of this application, the piston rod of the clamping cylinder 9 extends into the inner cavity of the movable seat 8, and a V-shaped clamping block 92 is provided at the end of the piston rod. The movable seat 8 in this application has a cylindrical structure, and its center also has a central channel along the axial direction. The central channel of the movable seat 8 is connected to the central channel of the connecting plate 5, and the tip 61 of the head frame extends into the movable seat 8.

[0040] By introducing compressed air into the clamping cylinder 9, its piston rod can be extended, thereby causing the two V-shaped clamping blocks 92 to move towards each other, thus achieving the clamping of the outer circle of the workpiece.

[0041] According to some embodiments of this application, the positioning disk 81 is provided with a lever 82, which is inserted into a turning hole 52 opened on the connecting plate 5. By setting the lever 82 on the positioning disk 81 to contact the turning hole 52 opened on the connecting plate 5, the rotational kinetic energy of the connecting plate 5 is transmitted to the movable seat 8, thereby driving the entire pneumatic clamping mechanism to rotate.

[0042] Preferably, multiple sets of the aforementioned lever 82 and actuation hole 52 are evenly arranged circumferentially to better transmit kinetic energy. It should be noted that the aforementioned lever 82 and actuation hole 52 adopt a large clearance fit so as not to affect the floating of the positioning plate 81 relative to the positioning hole 51.

[0043] According to some embodiments of this application, an end cap 53 is installed at one end of the connecting plate 5. The end cap 53 is fitted over the movable seat 8 and restricts the positioning disk 81 within the positioning hole 51. The end cap 53 has a ring plate structure and is fixedly connected to the end of the connecting plate 5 by bolts. The inner diameter of the end cap 53 is smaller than the outer diameter of the positioning disk 81 on the movable seat 8, so that after the end cap 53 is installed, the positioning disk 81 can be restricted within the positioning hole 51, thereby preventing the movable seat 8 from detaching from the connecting plate 5.

[0044] According to some embodiments of this application, the radial displacement of the positioning disk 81 relative to the positioning hole 51 is 0.5mm-1mm, and the axial displacement is less than 0.5mm. Specifically, the radial diameter difference between the positioning disk 81 and the positioning hole 51 is 0.5mm-1mm, achieving a large clearance fit in the radial direction, and the axial thickness difference between the positioning disk 81 and the depth of the positioning hole 51 is less than 0.5mm.

[0045] In this application, the workpiece is positioned using a "dead center," resulting in high positioning and repeatability accuracy. A clamping cylinder 9 drives a V-shaped clamping block 92 to clamp and release the workpiece. A large clearance fit is used between the movable seat 8 and the connecting plate 5, especially a radial clearance greater than 0.5mm. After clamping, the connecting plate 5 can float freely within this clearance range, allowing for adaptive floating of the workpiece during clamping. This prevents the workpiece from being pushed away from the center during machining and clamping, enabling automated machining of high-precision parts. Furthermore, the axial floating of the movable seat 8 adjusts the clamping position on the workpiece along its axial direction.

[0046] According to some embodiments of this application, the air passage includes an air inlet chamber 7 and an air guide channel; the air inlet chamber 7 includes an annular groove disposed opposite to the inner wall of the outer shell 2 and the outer wall of the rotating shaft 4, the outer shell 2 is provided with an air inlet hole 22 communicating with the air inlet chamber 7, and a sealing ring 21 is also provided between the outer shell 2 and the rotating shaft 4, the sealing ring 21 having two rings and being located on both sides of the air inlet chamber 7 respectively; The air passage includes a first air passage 41 located in the rotating shaft 4 and a second air passage 54 located in the connecting plate 5. The first air passage 41 is connected to the air intake chamber 7 and the second air passage 54 is connected to the second air passage 54 through the air pipe 91.

[0047] The aforementioned annular grooves are respectively located in the middle of the outer casing 2 and the rotating shaft 4. The openings of the two annular grooves are opposite each other and together form the air intake chamber 7. An air intake hole 22 is provided on the outer casing 2, which communicates with the annular groove on its inner side. The inlet of the air intake hole 22 can be connected to the machine tool compressed air pipe 91, thereby introducing compressed air into the air intake chamber 7.

[0048] The two sealing rings 21 mentioned above are used to seal the gap between the inner wall of the outer casing 2 and the outer wall of the rotating shaft 4 on both sides of the air intake chamber 7, thereby preventing air leakage from the gap. Specifically, the sealing rings 21 are set in the annular sealing groove opened on the inner wall of the outer casing 2, and the sealing effect is formed by the sealing rings 21 pressing against the outer wall of the rotating shaft 4.

[0049] According to some embodiments of this application, the first airway 41 includes a connected radial section and an axial section, one end of the radial section of the first airway 41 passes through the outer wall of the rotating shaft 4 and communicates with the air inlet chamber 7; the second airway 54 includes a connected radial section and an axial section, one end of the axial section of the second airway 54 communicates with one end of the axial section of the first airway 41, and one end of the radial section of the second airway 54 passes through the outer wall of the connecting plate 5 and communicates with the air pipe 91.

[0050] The axial section of the second air passage 54 corresponds to the axial section of the first air passage 41. Thus, after the connecting plate 5 is bolted to the end of the rotating shaft 4, the axial sections of the second air passage 54 and the first air passage 41 are perfectly aligned and connected. It should be noted that the end faces of the connecting plate 5 and the rotating shaft 4 are ground to achieve a high surface roughness. When the two are connected and pressed together, a seal is formed between the mating surfaces. Therefore, no seal is required between the mating surfaces. Of course, a seal can be installed depending on the actual situation.

[0051] Specifically, compressed air enters the air intake chamber 7 through the air inlet 22 on the outer casing 2, then enters the second air passage 54 in the connecting plate 5 through the first air passage 41 in the rotating shaft 4, and then is introduced into the clamping cylinder 9 through the air pipe 91. The compressed air pushes the V-shaped clamping block 92 on the piston rod of the clamping cylinder 9 to move, thereby achieving the clamping and releasing of the workpiece. When the compressed air is turned on, the workpiece is clamped, the machine tool spindle starts to rotate, driving the workpiece to rotate, and the workpiece grinding begins.

[0052] In this application, the clamping and positioning functions of the fixture for the workpiece are separated, which realizes both high-precision positioning and clamping, as well as clamping and rotation drive of the workpiece; the pneumatic clamping mechanism is connected by a rotary joint, and the clamping cylinder 9 can be controlled by the PLC program M code to drive the V-shaped clamping block 92 to automatically clamp the workpiece; at the same time, the pneumatic clamping mechanism and the connecting plate 5 are assembled with a large clearance, and can automatically adjust itself after clamping, so that the workpiece will not be pushed away from the center line due to clamping and affect the machining accuracy; the two centers adopt the "dead center" design to ensure the machining accuracy, positioning and repeatability of the workpiece.

[0053] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An automated floating fixture device for grinding, characterized in that, It includes a center, a transition plate, a rotary joint, and a pneumatic clamping mechanism; the center is a fixed center, which includes a headstock center and a tailstock center, the headstock center is mounted on the machine tool headstock, and the tailstock center is mounted on the machine tool tailstock; The transition plate is connected to the headstock spindle of the machine tool, the rotary joint is sleeved on the top of the headstock, and one end of the rotating part of the rotary joint is fixedly connected to the transition plate; the pneumatic clamping mechanism is connected to the other end of the rotating part of the rotary joint, and the pneumatic clamping mechanism can float as a whole relative to the rotary joint. The rotary joint is provided with an air passage, which is used to supply air to the pneumatic clamping mechanism so that the pneumatic clamping mechanism clamps the workpiece supported between the headstock tip and the tailstock tip.

2. The automated floating fixture device for grinding according to claim 1, characterized in that, The rotary joint includes a housing, a rotating shaft, and a connecting plate. The two ends of the rotating shaft are fixedly connected to the transition plate and the connecting plate, respectively. The housing is fitted over the rotating shaft, and a slewing bearing is formed between the two. The pneumatic clamping mechanism is floatingly connected to the connecting plate.

3. The automated floating fixture device for grinding according to claim 2, characterized in that, The pneumatic clamping mechanism includes a movable seat and clamping cylinders; one end of the movable seat is provided with a positioning plate, which is fitted into a positioning hole opened on the connecting plate, and the positioning plate has a floating amount in both the radial and axial directions relative to the positioning hole; multiple clamping cylinders are symmetrically arranged on the movable seat for clamping the workpiece.

4. The automated floating fixture device for grinding according to claim 3, characterized in that, The piston rod of the clamping cylinder extends into the inner cavity of the movable seat, and a V-shaped clamping block is provided at the end of the piston rod.

5. The automated floating fixture device for grinding according to claim 3, characterized in that, The positioning plate is equipped with a lever, which is inserted into a toggle hole on the connecting plate.

6. The automated floating fixture device for grinding according to claim 3, characterized in that, One end of the connecting plate is fitted with an end cap, which is sleeved over the movable seat and restricts the positioning plate within the positioning hole.

7. The automated floating fixture device for grinding according to claim 3, characterized in that, The radial float of the positioning plate relative to the positioning hole is 0.5mm-1mm, and the axial float is less than 0.5mm.

8. The automated floating fixture device for grinding according to claim 2, characterized in that, The outer circles at both ends of the rotating shaft form a slewing bearing with the inner wall of the housing through precision bearings.

9. The automated floating fixture device for grinding according to claim 3, characterized in that, The air passage includes an air intake chamber and an air guide channel; the air intake chamber includes an annular groove disposed opposite to the inner wall of the outer shell and the outer wall of the rotating shaft, the outer shell is provided with an air intake hole communicating with the air intake chamber, and a sealing ring is also provided between the outer shell and the rotating shaft, the sealing ring having two rings and being located on both sides of the air intake chamber respectively; The air passage includes a first air passage located inside the rotating shaft and a second air passage located inside the connecting plate. The first air passage is connected to the air intake chamber and the second air passage is connected to the second air passage through an air pipe.

10. The automated floating fixture device for grinding according to claim 9, characterized in that, The first airway includes a connected radial section and an axial section. One end of the radial section of the first airway passes through the outer wall of the rotating shaft and connects to the air inlet chamber. The second airway includes a connected radial section and an axial section. One end of the axial section of the second airway connects to one end of the axial section of the first airway. One end of the radial section of the second airway passes through the outer wall of the connecting plate and connects to the air pipe.

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