Superfinishing tool for small optical plastic sheets

Abstract

The utility model belongs to the technical field of optical plastic sheet processing, and particularly relates to an optical plastic small sheet superfinishing tool which comprises a disc, a negative pressure middle hole is formed in the middle of the disc in the axial direction, a plurality of air grooves are formed in the position, located at the lower edge of the negative pressure middle hole, of the end face of the disc at intervals, and the central axes of the air grooves all point to the central axis of the negative pressure middle hole. A movable block is arranged outside the disc and arranged above the negative pressure middle hole and the air groove, a fastening screw is installed on the outer side of the movable block in a threaded mode, the fastening screw penetrates through the movable block and is in threaded connection with the disc, a positioning screw hole is formed in the position, located above the negative pressure middle hole, of the end face of the disc, and the positioning screw hole is parallel to the negative pressure middle hole. A clamping groove communicated with the positioning screw hole is further formed in the end face of the disc. According to the utility model, the negative pressure contact surface can be increased, the small sheet can be limited, and a good fixing effect can be achieved in the superfinishing process of the optical plastic small sheet.

Description

Technical Field

[0001] The utility model belongs to the technical field of optical plastic thin slice processing, and in particular relates to a super-precision processing tool for optical plastic small thin slices. Background Art

[0002] Optical plastic, also known as optical resin, is a traditional optical material. Due to its excellent optical, mechanical, thermal and chemical properties, and the advantages of synthesis, processing and molding technology and manufacturing cost, it has become one of the three basic materials of optical lenses that can compete with optical glass (optical glass, optical crystal and optical polymer).

[0003] At present, optical lenses made of optical plastics have occupied half of the market, especially in the field of micro lenses, most of which are plastic lenses. Today's optical plastic flakes are small in size, thin in thickness, and can be used for double-sided light transmission imaging. The processing and fixing method is to connect the middle through hole of the tooling with the negative pressure device to adsorb the optical plastic flakes on the tooling.

[0004] The optical plastic thin sheet is fixed on the tooling. Due to the limitations of the small size, thin thickness and easy deformation of the optical plastic thin sheet, the negative pressure area is often concentrated in the middle of the tooling with a circular hole, resulting in weak local negative pressure attraction on the optical plastic thin sheet, which leads to the phenomenon of loose fixation during the processing of the optical plastic thin sheet. For this reason, we propose an ultra-precision processing tooling for optical plastic thin sheets. Utility Model Content

[0005] The utility model aims to provide a super-finishing tool for optical plastic thin sheets, which can increase the negative pressure contact surface and limit the thin sheets, thus playing a good fixing role in the super-finishing process of the optical plastic thin sheets.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A super-finishing tool for optical plastic thin sheets, comprising a disc, a negative pressure center hole is opened in the middle of the disc along the axial direction, a plurality of air grooves are arranged at intervals at the position of the lower edge of the negative pressure center hole on the end surface of the disc, and the central axis of the air grooves all point to the central axis of the negative pressure center hole, a movable block is arranged on the outside of the disc, the movable block is arranged above the negative pressure center hole and the air groove, a fastening screw is threadedly installed on the outer side of the movable block, the fastening screw passes through the movable block and is threadedly connected with the disc, when working, the disc is attached to the main shaft installation station, and a needle is used to make a circle, and the M5 mounting threaded hole of the disc is located at the same position as the main shaft screw. The disc is fixed and assembled at the hole position, and the disc is rounded with a needle again. The M4 countersunk hole position and the spindle screw hole position are used to fix and assemble the tooling. Then the small thin piece is covered with the negative pressure middle hole and the air groove, and the spindle negative pressure device is started to suck the small thin piece along the negative pressure middle hole and the air groove to increase the negative pressure contact surface, and the end face of the movable block is moved to touch the straight edge of the small thin piece. The M2 type fastening screw is turned forward to lock the movable block on the spindle, and the small thin piece is limited. It plays a good fixing role in the ultra-finishing process of optical plastic small thin pieces, so as to improve the qualified rate of processed products and reduce processing costs.

[0008] A positioning screw hole is provided on the end face of the disc above the negative pressure center hole. The positioning screw hole and the negative pressure center hole are parallel to each other, and can drive the movable block to face the disc. Inserting the fastening screw into the positioning screw hole can quickly find the position, drive the movable block to quickly fall into place, and reverse the fastening screw to disengage the positioning screw hole for quick disassembly.

[0009] The end surface of the disc is also provided with a slot connected to the positioning screw hole, the depth of the slot is smaller than the thickness of the movable block, and there is a spacing between the slot and the air groove. After the movable block is tightened by the screws, most of the movable block is immersed in the slot and limited, and the remaining part is exposed to the outside and can contact the straight edge of the small thin sheet, thereby supporting the small thin sheet with good stability.

[0010] A key hole is provided in the middle of the movable block, and a fastening screw penetrates the key hole. The movable block can be slid along the key hole so that the movable block can be aligned with the card slot.

[0011] An air storage groove is provided on the end face of the disc away from the air groove, and the air storage groove is connected to the negative pressure center hole. The back side of the disc serves as a gas relay chamber, which can attract air from the negative pressure center hole and the air groove with a larger diameter after the negative pressure device is started, and the suction effect is stronger.

[0012] A column is fixed inside the air groove, and the end face of the column is flush with the end face of the disc. The small thin slice is supported in the middle of the air groove to prevent the supporting surface of the small thin slice from becoming hollow when the small thin slice is attracted by negative pressure, thereby playing a multi-point support role and avoiding deformation in the middle of the small thin slice caused by external cutting processing load and internal negative pressure attraction.

[0013] The technical effects achieved by the utility model are:

[0014] The utility model discloses a super-finishing tooling for optical plastic small slices. When working, a disc is attached to the main shaft installation position, and is made into a circle with a needle. The M5 installation threaded hole of the M5 screw disc is located at the position of the main shaft screw hole for fixed assembly. The disc is made into a circle with a needle again, and is fixedly assembled from the position of the M4 countersunk hole to the position of the main shaft screw hole with an M4 screw, so that the fixation of the tooling can be completed. Then, the small slice is covered with the negative pressure middle hole and the air groove, and the main shaft negative pressure device is started to suck the small slice along the negative pressure middle hole and the air groove to increase the negative pressure contact surface, and the end face of the movable block is moved to lightly touch the straight edge of the small slice. The M2 type fastening screw is rotated forward to lock the movable block on the main shaft, and the small slice is limited. In the process of super-finishing of the optical plastic small slice, it plays a good fixing role, can improve the qualified rate of processed products, and reduce the processing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front view of the super finishing tooling of the utility model;

[0016] Figure 2 It is a side perspective view of the super finishing tool of the utility model;

[0017] Figure 3 It is a front view of the disc of the utility model;

[0018] Figure 4 It is a front view of the super finishing tooling of the utility model assembled behind the main shaft;

[0019] Figure 5 It is a perspective view of a traditional tooling of the utility model.

[0020] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0021] 1. Disc; 2. Negative pressure center hole; 3. Air groove; 4. Movable block; 5. Fastening screw; 6. Positioning screw hole; 7. Card slot; 8. Key hole; 9. Air storage groove; 10. Column; 11. Small thin sheet. DETAILED DESCRIPTION

[0022] In order to make the purpose and advantages of the utility model more clear, the utility model is specifically described in combination with the following embodiments. It should be understood that the following text is only used to describe one or several specific implementations of the utility model, and does not strictly limit the protection scope of the specific request of the utility model.

[0023] like Figure 1-5As shown, a super-finishing tooling for optical plastic thin sheets comprises a disc 1, a negative pressure center hole 2 is axially opened in the middle of the disc 1, a plurality of air grooves 3 are spaced apart at the end surface of the disc 1 at the position of the lower edge of the negative pressure center hole 2, the central axis of the air grooves 3 all point to the central axis of the negative pressure center hole 2, a movable block 4 is arranged on the outside of the disc 1, the movable block 4 and the disc 1 can both be made of aluminum alloy, the movable block 4 is arranged above the negative pressure center hole 2 and the air groove 3, a fastening screw 5 is threadedly installed on the outer side of the movable block 4, the fastening screw 5 model is M2, the fastening screw 5 passes through the movable block 4 and is threadedly connected with the disc 1, and also comprises a small thin sheet 11, a disc 1 of φ60 mm and thickness of 10 mm is pre-made, a negative pressure center hole 2 of φ1.2 mm is drilled in the middle, a plurality of M5 mounting threaded holes and two symmetrical M4 countersunk holes are opened on the edge of the disc 1 When working, place the disc 1 against the spindle installation position, use a needle to make a circle, use an M5 screw to fix the M5 mounting threaded hole of the disc 1 at the position of the spindle screw hole for assembly, use a needle to make a circle again, use an M4 screw to fix the M4 countersunk hole position and the spindle screw hole position for assembly, and the fixation of the tooling can be completed. Then, the small thin piece 11 covers the negative pressure middle hole 2 and the air groove 3, and the spindle negative pressure device is started to suck the small thin piece 11 along the negative pressure middle hole 2 and the air groove 3 to increase the negative pressure contact surface, and move the end face of the movable block 4 to lightly touch the straight edge of the small thin piece 11, and turn the M2 type fastening screw 5 forward to lock the movable block 4 on the spindle, and limit the small thin piece 11, which plays a good fixing role in the ultra-finishing process of the optical plastic small thin piece 11, can improve the qualified rate of the processed products, and reduce the processing cost.

[0024] like Figure 5 As shown, the small thin sheet 11 used in the optical element is preferably made of a fan-shaped blank with straight edges, which is made by mold casting or photocuring. The material is easy to obtain. The blank can completely cover the negative pressure center hole 2 and the air groove 3, and there is an excess blank part extending outward.

[0025] like Figure 2 and Figure 3 As shown, a positioning screw hole 6 is provided on the end face of the disk 1 above the negative pressure center hole 2. The positioning screw hole 6 and the negative pressure center hole 2 are parallel to each other, and the movable block 4 can be driven to face the disk 1. The fastening screw 5 is inserted into the positioning screw hole 6 to quickly find the position, and the movable block 4 can be driven to quickly fall into place. The fastening screw 5 is reversed to disengage from the positioning screw hole 6, and can be quickly disassembled.

[0026] like Figure 2 and Figure 3As shown, the end face of the disk 1 is also provided with a slot 7 connected to the positioning screw hole 6. The depth of the slot 7 is smaller than the thickness of the movable block 4. There is a spacing between the slot 7 and the air groove 3 so as not to block the air groove 3. After the fastening screw 5 presses the movable block 4, most of the movable block 4 is immersed in the slot 7 and is limited, and the remaining part is exposed to the outside and can contact the straight edge of the small thin sheet 11, thereby supporting the small thin sheet 11 with good stability.

[0027] like Figure 1 and Figure 2 As shown, a key hole 8 is provided in the middle of the movable block 4, and the key hole 8 is penetrated by a fastening screw 5. The movable block 4 can be slid along the key hole 8 so that the movable block 4 can be aligned with the slot 7, with a high degree of freedom, and the process of adjusting the position is smoother.

[0028] like Figure 2 , Figure 3 and Figure 4 As shown, an air storage groove 9 is provided on the end face of the disc 1 away from the air groove 3. The diameter of the air storage groove 9 is φ42 mm and the depth is 6 mm. The air storage groove 9 is connected to the negative pressure hole 2. The back side of the disc 1 serves as a gas relay chamber. After the negative pressure device is started, the air in the negative pressure hole 2 and the air groove 3 can be attracted with a larger diameter, and the suction effect is stronger.

[0029] like Figure 1 , Figure 2 and Figure 3 As shown, columns 10 are fixed inside the air groove 3, and the end faces of the columns 10 are flush with the end faces of the disk 1. A small thin sheet 11 supports the small thin sheet 11 in the middle of the air groove 3 to prevent the supporting surface of the small thin sheet 11 from becoming hollow when the small thin sheet 11 is attracted by negative pressure, and plays a role of multi-point support to avoid deformation in the middle of the small thin sheet 11 caused by external cutting processing loads and internal negative pressure attraction.

[0030] The working principle of the utility model is as follows: when working, the disc 1 is attached to the spindle installation position, and a circle is made with a needle. The M5 mounting threaded hole of the disc 1 is located at the position of the spindle screw hole for fixed assembly using an M5 screw. The disc 1 is again rounded with a needle, and the M4 screw is used to fix and assemble from the position of the M4 countersunk hole to the position of the spindle screw hole, thereby completing the fixation of the tooling.

[0031] Then, cover the negative pressure middle hole 2 and the air groove 3 with the small thin sheet 11, start the spindle negative pressure device to suck the small thin sheet 11 along the negative pressure middle hole 2 and the air groove 3, which can increase the negative pressure contact surface, and move the end face of the movable block 4 to lightly touch the straight edge of the small thin sheet 11, turn the M2 type fastening screw 5 forward to lock the movable block 4 on the spindle, and limit the small thin sheet 11, which plays a good fixing role in the ultra-fine processing of the optical plastic small thin sheet 11, can improve the qualified rate of the processed products, and reduce the processing cost.

[0032] The above is only a preferred embodiment of the present invention. It should be noted that, for ordinary technicians in the technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A super-finishing tool for optical plastic thin sheets, comprising a disc (1), characterized in that: A negative pressure center hole (2) is axially provided in the middle of the disk (1); a plurality of air grooves (3) are spaced apart at the end surface of the disk (1) at the lower edge of the negative pressure center hole (2); the central axes of the air grooves (3) all point to the central axis of the negative pressure center hole (2); a movable block (4) is provided outside the disk (1); the movable block (4) is provided above the negative pressure center hole (2) and the air grooves (3); a fastening screw (5) is threadedly installed on the outer side of the movable block (4); the fastening screw (5) passes through the movable block (4) and is threadedly connected to the disk (1).

2. The ultra-precision processing tool for optical plastic thin sheets according to claim 1, characterized in that: A positioning screw hole (6) is provided on the end surface of the disk (1) at a position above the negative pressure center hole (2), and the positioning screw hole (6) and the negative pressure center hole (2) are parallel to each other.

3. The ultra-precision processing tool for optical plastic thin sheets according to claim 2, characterized in that: The end surface of the disk (1) is also provided with a slot (7) communicating with the positioning screw hole (6); the depth of the slot (7) is smaller than the thickness of the movable block (4); and a spacing is left between the slot (7) and the air groove (3).

4. The ultra-precision processing tool for optical plastic thin sheets according to claim 1, characterized in that: A key hole (8) is provided in the middle of the movable block (4), and a fastening screw (5) penetrates the key hole (8).

5. The ultra-precision processing tool for optical plastic thin sheets according to claim 1, characterized in that: An air storage groove (9) is provided on the end surface of the disk (1) away from the air groove (3), and the air storage groove (9) is connected to the negative pressure center hole (2).

6. The ultra-precision processing tool for optical plastic thin sheets according to claim 1, characterized in that: A column (10) is fixed inside each of the air grooves (3), and the end surface of the column (10) is flush with the end surface of the disc (1).

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