A universal fixture for ion beam figuring

Abstract

The utility model relates to a general fixture for ion beam shaping polishing belongs to the field of ion beam processing, the general fixture includes carousel, bottom disc, clamping part, bearing, positioning locking block, bolt, measuring block, is equipped with the T type groove of interval 90 DEG, 180 DEG and 270 DEG on carousel, and clamping part can slide and lock in T type groove, adapts to a variety of shapes and size workpieces, transmission screw rod drives the up-and-down movement of support block, realizes the clamping of different thickness workpieces. The carousel and bottom disc are respectively with bearing inner and outer ring screw connection, install bearing, fix the carousel on the bottom disc, use positioning locking block to lock the carousel, according to workpiece shape selects suitable T type groove and clamps, utilizes measuring block to ensure workpiece accurate centering, finally adjusts clamping part position and thickness, completes clamping. Bearing uses GCr15 bearing steel, bottom disc, carousel and square block use 7075 hard aluminum and carry out hardening treatment, and clamping part carries out chrome plating or nickel plating treatment to improve hardness, resistance and corrosion resistance.

Description

Technical Field

[0001] This utility model belongs to the field of ion beam processing. Specifically, this utility model relates to a general-purpose fixture for ion beam shaping and polishing. Background Technology

[0002] In the field of ion beam polishing technology, there is a need for versatility in the clamping fixtures used in ion beam polishing machines to handle different sizes. Existing ion beam polishing machines have certain processing capabilities, such as processing lenses with a maximum diameter of φ500 mm. However, the clamping fixtures currently used with them suffer from insufficient versatility in processing sizes. While existing fixtures perform well in terms of fixation stability and compatibility with ion beam equipment, they are significantly limited in terms of processing size versatility. Specifically, current fixtures can only clamp workpieces with a diameter of φ300 mm, and their processing size range is φ30 mm–φ300 mm. This means that when processing larger workpieces, existing fixtures cannot meet the requirements, preventing the ion beam polishing machine from fully realizing its processing size capabilities. This situation limits the effective application range of ion beam polishing machines, and when dealing with workpieces of different shapes such as round, rectangular, and elliptical, the clamping capacity of existing fixtures is also limited by their processing size, making it difficult to meet the clamping needs of various shapes and larger workpieces. Summary of the Invention

[0003] To overcome the problems existing in the background technology, this utility model relates to a universal fixture for ion beam shaping and polishing. The universal fixture has a turntable with a turntable boss on its lower surface and a turntable mating hole at the center of its upper surface. A bearing is installed in the turntable mating hole. The turntable is mounted on the upper surface of the base by inserting the turntable boss into the turntable mating hole. Four T-slots are arranged at 90° intervals on the upper surface of the turntable, allowing for T-slots at intervals of 90°, 180°, 270°, and 360°. Clamping components are installed in each of the four T-slots, and the workpiece to be processed is placed between the four clamping components. Measuring blocks and positioning locking blocks are arranged around the turntable. The clamping components can slide and lock within the T-slots of the turntable, while the support blocks on the clamping components can move up and down. The combination of these two components allows for the positioning and clamping of parts of different shapes, sizes, and thicknesses. The measuring blocks measure the position of each clamping component during the rotation of the turntable to ensure accurate centering of the part. The positioning locking block locks the turntable when it rotates to the point where the dial indicator probe is aligned with the clamping component, thus ensuring the accuracy of the measurement results.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: The universal fixture for ion beam shaping and polishing is characterized by comprising: a turntable, a base, clamping components, bearings, measuring blocks, pins, and positioning locking blocks; the turntable is inserted from the upper surface of the base, and the turntable has a circular disc structure. Four T-slots are arranged at 90° intervals on the upper surface of the turntable, and each T-slot has a pin groove at its edge, enabling T-slots and pin grooves to be arranged at intervals of 90°, 180°, 270°, and 360°; the measuring block is located on the top surface of the base, around the turntable; the positioning locking blocks are located on the top surface of the base, around the turntable, and are connected to the T-slots via pins inserted into the pin grooves; four clamping components are installed within the T-slots, and the workpiece to be processed is installed between the four clamping components.

[0005] As a preferred embodiment, the system includes: a measuring block assembly hole, a positioning and locking block assembly hole, and a turntable mating hole; the measuring block assembly hole and the positioning and locking block assembly hole are two sets of threaded holes symmetrically arranged at 180° intervals on the upper surface of the chassis, the turntable mating hole is provided through the upper surface of the chassis, the bearing outer ring is located inside the turntable mating hole, and the top surface of the bearing outer ring is provided with a bearing outer ring mounting hole.

[0006] As a preferred embodiment, the system includes: a punch hook and a bearing outer ring mounting hole; the punch hook is symmetrically arranged on the lower surface of the chassis, and the bearing outer ring mounting hole is through-hole arranged on the lower surface of the chassis.

[0007] As a preferred embodiment, the bearing includes a turntable boss and a bearing inner ring mounting hole; the turntable boss is located at the center of the lower surface of the turntable, and the bearing inner ring mounting hole is located on the upper surface of the turntable boss.

[0008] Preferably, the clamping component includes: a hook, a drive stud, a locking stud, a T-slot boss, a support block, and a square block; the hook is located at the top edge of the clamping component base, the T-slot boss is located at the bottom of the clamping component base, the drive stud and the locking stud are installed from top to bottom through the interior of the clamping component base, the drive stud has a drive screw installed inside, the support block is mounted on the drive screw, and the square block is located on the bottom surface of the clamping component base.

[0009] Preferably, the measuring block is a crescent-shaped block, with the radii of curvature of the two arcs corresponding to the radius of the chassis and the radius of the turntable, respectively; the upper surface of the measuring block is provided with symmetrical measuring block mounting holes and measuring block bosses, and the side of the measuring block bosses is provided with blind holes for mounting magnets.

[0010] Preferably, the positioning and locking block is a crescent-shaped slotted block, with the radius of curvature of the two arcs corresponding to the radius of the chassis and the radius of the turntable, respectively; the slotted position of the positioning and locking block is matched with the pin and connected with screws, and can be inserted into the pin slot for positioning and locking; the upper surface of the positioning and locking block is provided with a positioning and locking block mounting hole.

[0011] Preferably, the pin groove is divided into 90° pin groove, 270° pin groove, 270° T-groove, 0° T-groove, and 0° pin groove.

[0012] Preferably, the bearing includes an outer ring and an inner ring; a countersunk hole is provided through the top surface of the outer ring; and a countersunk hole is provided through the top surface of the inner ring.

[0013] The beneficial effects of this utility model are as follows: The lower surface of the turntable of the universal fixture is provided with a turntable boss, and the center of the upper surface of the base plate is provided with a turntable mating hole. A bearing is installed in the turntable mating hole. The turntable is installed on the upper surface of the base plate by inserting the turntable boss into the turntable mating hole. The upper surface of the turntable is provided with four T-slots at 90° intervals, which can realize T-slots at intervals of 90°, 180°, 270° and 360°. Clamping components are provided in each of the four T-slots, and the workpiece to be processed is placed between the four clamping components. Measuring blocks and positioning locking blocks are provided around the turntable. The clamping components can slide and lock in the T-slots of the turntable. At the same time, the support blocks on the clamping components can move up and down. The combination of these two can be used to position and clamp parts of different shapes, sizes and thicknesses. The measuring blocks play a role in measuring the position of each clamping component during the rotation of the turntable to ensure that the parts can be accurately centered. The positioning locking block locks the turntable when it rotates to the point where the dial indicator probe is aligned with the clamping component, thus ensuring the accuracy of the measurement results. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the fixture and workpiece assembly. Figure 2 This is a schematic diagram of the overall structure of the fixture; Figure 3 This is a schematic diagram of the lower half of the fixture structure; Figure 4 This is a schematic diagram of the upper surface structure of the fixture turntable; Figure 5 This is a schematic diagram of the lower surface structure of the fixture turntable; Figure 6 This is a schematic diagram of the upper surface structure of the fixture chassis; Figure 7 This is a schematic diagram of the lower surface structure of the fixture chassis; Figure 8 This is a schematic diagram of an angular contact ball bearing. Figure 9 This is a schematic diagram of the clamping components of the fixture; Figure 10 Schematic diagram of the clamping and positioning locking block structure; Figure 11 This is a schematic diagram of the fixture measuring block structure.

[0015] In the diagram: Clamping component 1, workpiece to be processed 2, measuring block 3, pin 4, positioning locking block 5, base 6, turntable 7, bearing 8, hook 101, transmission stud 102, locking stud 103, clamping component base boss 104, support block 105, square block 106, clamping component base 107, measuring block boss 301, blind hole 302, measuring block base 303, measuring block mounting hole 304, positioning locking block base 501, positioning locking block mounting hole 502, measuring block assembly hole 601, positioning lock Fastening block assembly hole 602, turntable mating hole 603, bearing outer ring mounting hole 604, punched hook 605, 180° pin groove 701, 180° T-slot 702, 90° T-slot 703, 90° pin groove 704, 270° pin groove 705, 270° T-slot 706, 0° T-slot 707, 0° pin groove 708, turntable boss 709, bearing inner ring mounting hole 710, bearing outer ring 801, bearing outer ring countersunk hole 802, bearing inner ring 803, bearing inner ring countersunk hole 804. Detailed Implementation

[0016] To make the above objectives, technical solutions, and beneficial effects clearer and more explicit, the present invention will be described in detail below with reference to the accompanying drawings.

[0017] like Figure 1-11 As shown, the general-purpose fixture for ion beam shaping and polishing includes a turntable 7, a base 6, a clamping component 1, an angular contact ball bearing 8, a positioning locking block 5, a pin 4, and a measuring block 3.

[0018] The turntable 7 is a circular disc structure. Four T-slots are arranged at 90° intervals on the upper surface of the turntable 7. Each T-slot has a pin groove at the edge of the turntable 7, which can realize the arrangement of T-slots and pin grooves at intervals of 90°, 180°, 270° and 360°. The pin grooves are divided into 90° pin groove 704, 270° pin groove 705, 270° T-slot 706, 0° T-slot 707 and 0° pin groove 708. Clamping components 1 are arranged in each of the four T-slots. The workpiece 2 to be processed is placed between the four clamping components 1. Measuring blocks 3 and positioning locking blocks 5 are arranged around the turntable 7. The clamping components 1 can slide and lock in the T-slots of the turntable 7. At the same time, the support block 105 on the clamping component 1 can move up and down. The combination of these two can be used to position and clamp parts of different shapes, sizes and thicknesses.

[0019] A turntable boss 709 is provided at the center of the lower surface of the turntable 7. A bearing inner ring mounting hole 710 is provided on the upper surface of the turntable boss 709. The upper surface of the turntable boss 709 can provide a support surface for the installation of the bearing inner ring 803. A countersunk hole for the bearing inner ring 803 is provided through the upper surface of the bearing inner ring 803. After the bearing inner ring mounting hole 710 on the upper surface of the turntable boss 709 coincides with the countersunk hole of the bearing inner ring 803, a screw is inserted to install the bearing inner ring 803.

[0020] The chassis 6 is a circular disc structure. A turntable mating hole 603 is provided through the upper surface of the chassis 6, and a bearing outer ring mounting hole 604 is provided on the lower surface of the chassis 6. The bearing outer ring 801 is installed from the lower surface of the chassis 6. A bearing outer ring countersunk hole 802 is provided through the top surface of the bearing outer ring 801. After the bearing outer ring countersunk hole 802 and the bearing outer ring mounting hole 604 are aligned, a screw is inserted to install the bearing outer ring 801. The turntable 7 is installed from the upper surface of the chassis 6. The turntable boss 709 is inserted into the turntable mating hole 603 and installed on the upper surface of the chassis 6. The turntable 7 rotates on the upper surface of the chassis 6.

[0021] Two sets of threaded holes are symmetrically arranged at 180° intervals on the upper surface of the chassis 6. The two sets of threaded holes are measuring block mounting holes 304 and positioning locking block mounting holes 502. Measuring block 3 is installed at measuring block mounting hole 304 and is installed on the top surface of chassis 6, around the turntable 7. Positioning locking block 5 is installed at positioning locking block mounting hole 502 and is installed on the top surface of chassis 6, around the turntable 7. Positioning locking block 5 is connected to the T-slot on the top surface of the drill plate by inserting a pin 4 into the pin groove. Two perforated hooks 605 are symmetrically arranged on the lower surface of chassis 6, which can be hung on the ion beam workpiece trolley.

[0022] The clamping component 1 has a quadrangular prism structure. A hook 101 is provided on the top edge of the clamping component base 107, and a clamping component base boss 104 is provided on the bottom of the clamping component base 107 to mate with the T-slot of the turntable 7. Two studs, a drive stud 102 and a locking stud 103, are provided through the top surface of the clamping component 1 from top to bottom. The boss of the clamping component 1 can slide in the T-slot of the turntable 7, allowing for adjustable clamping diameter. The locking stud 103 extends through the clamping component 1 from top to bottom, and can be locked by connecting a block 106 with a threaded hole of the same size. The clamping component 1 also has a drive stud 102 extending from top to bottom, with a drive screw inside. A support block 105 is mounted on the drive screw. Pulling the drive screw allows the support block 105 to move up and down, and in conjunction with the hook 101 on the top of the clamping component 1, the thickness of the workpiece 2 to be processed can be adjusted.

[0023] The bearing 8 is a customized angular contact ball bearing 8, which can bear 80kg axial force and 30kg radial force, and can meet the processing requirements of most optical components of most materials and sizes; the chassis 6 has symmetrically arranged perforated hooks 605 on its lower surface, which can be hung on the ion beam workpiece trolley.

[0024] The measuring block 3 is a crescent-shaped block, with the radii of curvature of the arcs on both sides corresponding to the radii of the base 6 and the turntable 7, respectively. Symmetrical measuring block mounting holes 304 and measuring block bosses 301 are provided on the upper surface of the measuring block 3. The measuring block mounting holes 304 coincide with the measuring block assembly holes 601, allowing the measuring block 3 to be mounted on the upper surface of the base 6. A blind hole 302 for mounting a magnet is provided through the side of the measuring block boss 301, allowing the magnet to firmly hold the dial indicator during measurement, ensuring measurement stability.

[0025] The positioning and locking block 5 is a crescent-shaped slotted block, with the radii of curvature of its two sides corresponding to the radii of the chassis 6 and the turntable 7, respectively. The slotted position of the positioning and locking block 5 mates with the pin 4 and is connected with a screw, allowing it to be inserted into the pin slot for positioning and locking. A positioning and locking block mounting hole 502 is provided through the upper surface of the positioning and locking block 5, which coincides with the positioning and locking block assembly hole 602, allowing the positioning and locking block 5 to be installed on the upper surface of the chassis 6.

[0026] When assembling the universal fixture for ion beam shaping and polishing, use a cleaning cloth dampened with an appropriate amount of industrial alcohol to carefully wipe the surfaces on the chassis 6 that need to be connected, ensuring that the surfaces are free of oil, dust, and other impurities to guarantee the tightness and stability of the connection. Install the bearing 8 from the lower surface of the chassis 6. Before installing the outer ring 801, clean and inspect the outer ring 801 to ensure that there are no scratches, pits, or other defects on its surface and that the rolling elements can rotate freely. Align the outer ring 801 with the turntable mating hole 603 on the lower surface of the chassis 6. Insert the outer ring 801 into the turntable mating hole 603 of the chassis 6. After the countersunk hole 802 of the outer ring aligns with the outer ring mounting hole 604, connect it with screws until the outer ring 801 is fully installed and tightly fitted with the mating surface of the chassis 6. Wipe the surface of the turntable boss 709 and the inner ring 803 with a clean cloth to remove any dust and impurities, ensuring good contact between them. Install the turntable 7 from the upper surface of the chassis 6. Insert the turntable boss 709 into the turntable mating hole 603. After the countersunk hole of the inner ring 803 aligns with the inner ring mounting hole 710, connect it with screws. The turntable boss 709 is connected to the bearing inner ring 803. After the turntable 7 is installed, the base 6 is fixed while the turntable 7 can rotate. Four T-slots are provided on the upper surface of the turntable 7 at 90° intervals. Each T-slot has a pin groove at the edge of the turntable 7, allowing for T-slots and pin grooves at intervals of 90°, 180°, 270°, and 360°. The pin grooves are categorized as 90° pin groove 704, 270° pin groove 705, 270° T-slot 706, and 0° T-slot 706. The four T-slots, including groove 707 and 0° pin groove, are equipped with clamping components 1. The workpiece 2 to be processed is placed between the four clamping components 1. On the upper surface of the base 6, the turntable 7 is surrounded by measuring blocks 3 and positioning locking blocks 5. The clamping components 1 can slide and lock in the T-slots of the turntable 7. At the same time, the support block 105 on the side of the clamping component 1 can move up and down. The combination of these two can be used to position and clamp parts of different shapes, sizes and thicknesses.

[0027] Before installing clamping component 1, inspect it to ensure that its dimensional accuracy meets the requirements, the clamping surface is flat and smooth, and the mating dimensions with the T-slot of the turntable 7 are appropriate. Insert clamping component 1 into one end of the T-slot of the turntable 7. The clamping component base boss 104 at the bottom of clamping component 1 slides and locks in the T-slot of the turntable 7. At the same time, the support block 105 on the side of clamping component 1 can move up and down. The measuring block 3 plays the role of measuring the position of each clamping component 1 during the rotation of the turntable 7 to ensure that the part can be accurately centered. The positioning locking block 5 locks the turntable 7 when the dial indicator probe is directly facing the clamping component 1, thereby ensuring the accuracy of the measurement results. The positioning locking block 5 locks the turntable 7 in the initial position. According to the dimensions of the workpiece 2 to be processed, install the clamping component 1 on the T-slot and slide to adjust its position so that the center of the area surrounded by the three (or four) clamping components 1 roughly coincides with the center of the turntable 7. Then rotate the stud to lower the support block 105 of the clamping component 1, leaving sufficient clamping space for the workpiece 2 to be processed. Gently place the workpiece 2 to be processed on the support block 105 of the three (or four) clamping components 1, and let the outer edge of the workpiece 2 gently abut against the hook 101 of the clamping component 1 to complete the initial clamping. Magnetically attract the electronic dial indicator at the magnet position of the measuring block 3, and the electronic dial indicator can stably adhere to the measuring block 3.

[0028] When the turntable 7 is rotated, the probe of the electronic micrometer will sequentially contact three (or four) clamping components 1. At this time, the position of the clamping components 1 is finely adjusted, while ensuring that the workpiece 2 to be processed is always gently against the hook 101 of the clamping component 1. This ensures that the reading on the micrometer is consistent for each clamping component 1 position when the turntable 7 rotates, thus achieving concentric clamping of workpieces of different shapes and sizes. Finally, the transmission screw inside the transmission stud 102 of the clamping component 1 is pulled, raising each support block 105 and causing the workpiece to move up and down, so that the upper surface edge of the workpiece gently against the hook 101 of the clamping component 1, ultimately achieving clamping of workpieces of different thicknesses. When clamping the workpiece, ensure that the clamping direction is completely consistent with the surface shape measurement direction. After clamping, use the pin 4 to insert into the pin groove to lock the turntable 7, and flip the turntable 7. Hang the punched hook 605 on the lower surface of the turntable 7 on the trolley pin 4 of the loading chamber of the ion beam polishing machine, and push it to the trolley locking position. Subsequently, the trolley will be moved to the main chamber for processing by the push-pull rod of the ion beam polishing machine in a vacuum environment.

[0029] After the clamping component 1 clamps the workpiece, when the workpiece 2, clamping component 1, chassis 6, and turntable 7 become a single unit and are flipped upside down on the trolley, the combined weight of the three acts on the inner ring 803 of the bearing. Due to the large gravity, the bearing 8 is an angular contact ball bearing made of GCr15 bearing steel to withstand axial forces exceeding 50 kg. The clamping component 1 is clamped onto the turntable 7 by locking studs 103 and square blocks 106. Because the T-slots are at risk of deformation under heavy loads, the turntable 7 and square blocks 106 are made of 7075 hard aluminum.

[0030] The bearing 8, made of GCr15 steel, undergoes quenching and tempering to improve its hardness and wear resistance, ensuring its performance under large axial forces. Furthermore, the surface of the bearing 8 is ground and polished to further reduce surface roughness and improve surface quality, thereby minimizing friction and wear during use.

[0031] The chassis 6 is made of 7075 hard aluminum and has undergone a hardening treatment. After processing, its surface is anodized. Anodizing improves the surface hardness, wear resistance, and corrosion resistance of the chassis 6. Similarly, the turntable 7 and the cube 106, also made of 7075 hard aluminum, are anodized to improve their surface hardness and corrosion resistance, ensuring stability under ion beam conditions.

[0032] The clamping component 1 is subjected to chrome plating or nickel plating, with the chrome plating layer thickness controlled at 0.01-0.03mm and the nickel plating layer thickness controlled at 0.02-0.05mm, in order to improve the wear resistance and corrosion resistance of the clamping component 1.

[0033] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. A universal fixture for ion beam shaping and polishing, characterized in that, include: Turntable, chassis, clamping components, bearings, measuring blocks, pins, positioning and locking blocks; The turntable is installed from the upper surface of the chassis. The turntable has a circular disc structure. Four T-slots are set at 90° intervals on the upper surface of the turntable. Each T-slot has a pin groove at the edge of the turntable, so that T-slots and pin grooves can be set at intervals of 90°, 180°, 270° and 360°. The measuring block is positioned on the top surface of the chassis, around the outer edge of the turntable; The positioning and locking block is located on the top surface of the chassis and around the turntable. The positioning and locking block is connected to the T-slot by inserting a pin into the pin groove. The clamping components are installed in the T-slots, and there are four clamping components. The workpiece to be processed is installed between the four clamping components.

2. A universal fixture for ion beam shaping and polishing according to claim 1, characterized in that, include: The measuring block assembly hole, the positioning and locking block assembly hole, and the turntable mating hole are two sets of threaded holes symmetrically arranged at 180° intervals on the upper surface of the chassis. The turntable mating hole is provided through the upper surface of the chassis, the bearing outer ring is located inside the turntable mating hole, and the bearing outer ring mounting hole is provided through the top surface of the bearing outer ring.

3. A universal fixture for ion beam shaping and polishing according to claim 1, characterized in that, include: The punched hooks and bearing outer ring mounting holes are symmetrically arranged on the lower surface of the chassis, and the bearing outer ring mounting holes are arranged through the lower surface of the chassis.

4. A universal fixture for ion beam shaping and polishing according to claim 1, characterized in that, include: Turntable boss and bearing inner ring mounting hole; the turntable boss is located at the center of the lower surface of the turntable, and the bearing inner ring mounting hole is located on the upper surface of the turntable boss.

5. A universal fixture for ion beam shaping and polishing according to claim 1, characterized in that: The clamping component includes: a hook, a drive stud, a locking stud, a T-slot boss, a support block, and a square block; the hook is located at the top edge of the clamping component base, the T-slot boss is located at the bottom of the clamping component base, the drive stud and the locking stud are installed from top to bottom through the interior of the clamping component base, the drive stud has a drive screw installed inside, the support block is mounted on the drive screw, and the square block is located on the bottom surface of the clamping component base.

6. A universal fixture for ion beam shaping and polishing according to claim 1, characterized in that: The measuring block is a crescent-shaped block, with the radii of curvature of the two arcs corresponding to the radius of the chassis and the radius of the turntable, respectively. The upper surface of the measuring block is provided with symmetrical measuring block mounting holes and measuring block bosses, and the side of the measuring block bosses is provided with blind holes for mounting magnets.

7. A universal fixture for ion beam shaping and polishing according to claim 1, characterized in that: The positioning and locking block is a crescent-shaped slotted block, with the radius of curvature of the two arcs corresponding to the radius of the chassis and the radius of the turntable, respectively. The slotted position of the positioning locking block is matched with the pin and connected with a screw. It can be inserted into the pin slot for positioning and locking. The upper surface of the positioning locking block is provided with a positioning locking block mounting hole.

8. A universal fixture for ion beam shaping and polishing according to claim 1, characterized in that: The pin grooves are divided into 90° pin grooves, 270° pin grooves, 270° T-grooves, 0° T-grooves, and 0° pin grooves.

9. A universal fixture for ion beam shaping and polishing according to claim 1, characterized in that: The bearing includes an outer ring and an inner ring; a countersunk hole is provided through the top surface of the outer ring; a countersunk hole is provided through the top surface of the inner ring.

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