Shaft hole optical element machining machine tool with thread differential fine adjustment positioning function

Abstract

The invention provides a shaft hole type optical element machining machine tool with a thread differential fine adjustment positioning function. The shaft hole type optical element machining machine tool comprises a machine frame, a cutter mechanism, a microscope mechanism, a rotating main shaft mechanism, a thread differential fine adjustment positioning mechanism and a differential adjustment driving part. The cutter mechanism is provided with a servo motor, a ball screw assembly and a cutter, the microscope mechanism is provided with a clamping frame and a microscope, the rotating main shaft mechanism is provided with an inner supporting chuck, a T-shaped groove plate, an adjusting sliding table, a locking ring and a servo motor, the differential thread fine adjustment part is provided with a differential screw assembly, and the differential adjustment driving part is provided with a shifting fork assembly, a servo motor and a ball screw assembly. Whether the center position of a to-be-machined element is centered or not is observed through the microscope mechanism, the to-be-machined element is centered through the thread differential fine adjustment positioning mechanism, the element is machined through the cutter mechanism, and the device has the advantages of being high in centering efficiency and positioning precision, convenient to use and the like and can be suitable for various production environments needing shaft hole type optical element machining.

Description

Technical Field

[0001] The invention relates to the technical field of machining machine tools, and in particular to a shaft-hole optical element machining machine tool with thread differential fine adjustment positioning. Background Art

[0002] Existing optical component processing machines generally use V-groove positioning and fixture positioning to position components. For optical components that need to be precisely adjusted, V-grooves are not flexible enough, are difficult to adjust, and are severely worn, resulting in reduced positioning accuracy; fixtures for fixture positioning may need to be adjusted or replaced frequently, which will lead to reduced efficiency on the production line. When the fixture is fixing the optical component, stress concentration may occur in certain areas, which may affect the performance of the component or cause damage. In addition, these methods have low adjustment accuracy and require secondary positioning.

[0003] The current method of adjusting the clearance of the slide relies on an ordinary single-threaded bolt, which adjusts the axial clearance by rotating it one circle. In order to improve the accuracy of the adjustment, it is usually necessary to reduce the pitch of the bolt. However, the current minimum pitch is 0.2mm, and it is only applicable to M1 bolts. This not only fails to meet the stiffness requirements, but also limits the further improvement of the adjustment accuracy. Therefore, it is very difficult to rely on a single thread of the adjustment slide for adjustment. How to effectively adjust the processing positioning accuracy has become a technical challenge that needs to be solved on site. Summary of the invention

[0004] In view of this, the present invention proposes a shaft-hole optical element processing machine tool with thread differential fine adjustment positioning to solve the problems existing in the above-mentioned prior art.

[0005] To achieve the above-mentioned purpose, the present invention proposes a shaft-hole optical element processing machine tool with thread differential fine adjustment positioning, comprising a bed frame, a cutter mechanism, a microscope mechanism, a rotating spindle mechanism, and a differential adjustment drive part;

[0006] The cutter mechanism, microscope mechanism, rotating spindle mechanism, thread differential fine adjustment positioning mechanism, and differential adjustment driving part are respectively fixed on the bed frame;

[0007] The position of the optical element is adjusted by the microscope mechanism, and the differential adjustment drive part provides torque for the thread differential fine adjustment positioning mechanism, so that the rotating spindle mechanism cooperates with the cutter mechanism to perform positioning and rotation processing of the optical element.

[0008] Further, the cutter mechanism includes a first servo motor, a first ball screw assembly, a tool holder base plate, a second servo motor, a second ball screw assembly, a tool holder and a tool, wherein the first servo motor drives the first ball screw assembly, thereby controlling the tool holder base plate to perform linear motion;

[0009] The tool is mounted on the tool holder, the tool holder is mounted on the second ball screw assembly, the second servo motor drives the second ball screw assembly to move, and drives the tool holder to move.

[0010] Furthermore, the first ball screw assembly includes a sliding guide rail, a guide rail slider, a column nut seat, and a ball screw base;

[0011] The sliding guide rail and the ball screw base are fixed on the bed frame, and the guide rail slider and the column nut seat are connected to the tool holder bottom plate.

[0012] Furthermore, the microscope mechanism includes a microscope and a microscope stand, and the microscope is mounted on the microscope stand; the position of the optical element is adjusted by observing the relative position between the center of the microscope and the center of the optical element.

[0013] Further, the rotating spindle mechanism includes an optical element, an inner support fixture, a first adjustment slide, a second adjustment slide, and a fourth servo motor;

[0014] The optical element is arranged on an inner support fixture, the inner support fixture is arranged on a first adjustment slide, the first adjustment slide and the second adjustment slide are connected to each other, and the fourth servo motor is fixed on the bed frame.

[0015] Furthermore, the fourth servo motor drives the first adjustment slide and the second adjustment slide to rotate, so that the inner support fixture rotates and then drives the optical element to rotate.

[0016] Furthermore, the thread differential fine adjustment positioning mechanism comprises a nut seat, a locking ring, and a differential screw, the nut seat and the first adjustment slide are connected to each other in a cooperative manner, and the locking ring is connected and fixed to the differential screw;

[0017] The differential screw rotates to drive the nut seat and the first adjusting slide to perform linear motion.

[0018] Further, the differential adjustment driving part includes a motor, a third ball screw assembly, a column nut, a third servo motor, and a shift fork;

[0019] The motor and the third ball screw assembly are fixed on the bed frame, the column nut and the third servo motor are connected in a cooperative manner, and the shift fork is arranged on the third servo motor.

[0020] Furthermore, the motor drives the third servo motor connected to the column nut seat to perform linear motion through the third ball screw assembly, and transmits torque through the contact between the shift fork and the locking ring.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] Compared with traditional optical element processing and positioning, the present invention adds a differential screw adjustment device, which has higher adjustment accuracy and efficiency. The present invention also adds an internal support clamp device to clamp the optical element, which is relatively simple to adjust and has less wear. The clamping device does not need to be adjusted or replaced frequently. The device of the present invention does not require secondary positioning during the processing process and has the advantages of high centering efficiency, high positioning accuracy, and easy use. It can be applied to various production environments that require the processing of axial hole optical elements. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not considered to be limitations of the present invention. In addition, the same reference symbols are used to represent the same components throughout the accompanying drawings.

[0024] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0025] In the attached picture:

[0026] Figure 1 Schematic diagram of the overall structure of a processing machine tool in an embodiment of the present invention;

[0027] Figure 2 It is a structural schematic diagram of a processing machine tool in an embodiment of the present invention after removing the bed frame, the cutting knife mechanism and the microscope mechanism;

[0028] Figure 3 Schematic diagram of the structure of the cutter mechanism in an embodiment of the present invention;

[0029] Figure 4 Schematic diagram of the structure of a ball screw assembly in an embodiment of the present invention;

[0030] Figure 5 Schematic diagram of a microscope mechanism in an embodiment of the present invention;

[0031] Figure 6 Schematic diagram of a differential regulation driving part in an embodiment of the present invention;

[0032] Figure 7 Schematic diagram of a rotating spindle mechanism in an embodiment of the present invention;

[0033] Figure 8 is a schematic diagram of a differential adjustment mechanism in an embodiment of the present invention;

[0034] Fig. 9 Schematic diagram of a differential screw in an embodiment of the present invention;

[0035] Fig.10 is a schematic diagram of an internal support fixture in an embodiment of the present invention;

[0036] Fig.11 is a cross-sectional view of an inner support fixture in an embodiment of the present invention;

[0037] Wherein: 1-bed, 2-cutter mechanism, 3-microscope mechanism, 4-rotating spindle mechanism, 5-thread differential fine adjustment positioning mechanism, 6-differential adjustment drive part, 7-first servo motor, 8-first ball screw assembly, 8a-sliding guide rail, 8b-guide rail slider, 8c-column nut seat, 8d-ball screw base, 9-tool holder base plate, 10-second servo motor, 11-second ball screw assembly, 12-tool holder, 13-tool, 14-microscope, 15-microscope stand, 16-motor, 17-third ball screw assembly, 18-column nut seat, 19-third servo motor, 20-fork, 21-optical element, 22-internal support fixture, 23-first adjustment slide, 24-second adjustment slide, 25-fourth servo motor, 26-nut seat, 27-locking ring, 28-differential screw. DETAILED DESCRIPTION

[0038] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to be able to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0039] This embodiment provides a shaft-hole optical element processing machine tool with thread differential fine adjustment positioning, such as Figure 1As shown, it includes a bed frame 1, a cutter mechanism 2, a microscope mechanism 3, a rotating spindle mechanism 4, a thread differential fine adjustment positioning mechanism 5, and a differential adjustment driving part 6. Among them, the cutter mechanism 2, the microscope mechanism 3, the rotating spindle mechanism 4, and the differential adjustment control part 6 are all fixed to the bed frame 1. In the present invention, the microscope mechanism 3 observes the relative position between the center of the optical element on the rotating spindle structure 4 and the center of the microscope 14, and the DC motor of the differential adjustment driving part 6 drives the motor on the ball screw slider to make a linear motion, and the motor on the slider further drives the thread differential fine adjustment positioning mechanism 5 for positioning, and the cutter mechanism 2 and the rotating spindle mechanism 4 process the optical element 21.

[0040] Specifically, the bed frame 1 is the supporting part of the equipment, and the cutter mechanism 2, the microscope mechanism 3, the rotating spindle mechanism 4, and the differential adjustment driving part 6 are all installed on the bed frame, and play a guiding role when the cutter mechanism 2 moves.

[0041] The function of the cutter mechanism 2 is to process the optical element 21 according to the instructions provided by the control part so that it meets the element characteristics set by the user. The cutter 13 of the cutter mechanism 2 is installed on the tool holder 12, and the ball screw driven by the first servo motor 7 further drives the tool holder 13 to move linearly. The first ball screw assembly 8 driven by the first servo motor 7 controls the linear movement of the tool holder base plate 9, and the cutter 13 can form two linear movements in perpendicular directions. This mechanism includes a first servo motor 7, a second servo motor 10, a first ball screw assembly 8, a tool holder base plate 9, a second ball screw assembly 11, a tool holder 12, and a cutter 13. Among them, the first servo motor 7, the sliding guide rail 8a, and the ball screw base 8d are all connected and fixed to the bed frame 1 by threaded matching, the guide rail slider 8b, the column nut seat 18 and the tool holder base plate 9 are connected by threaded matching, the second servo motor 10 and the second ball screw assembly 11 are all connected and fixed to the tool holder base plate 9 by threaded matching, the tool holder 13 is connected to the second ball screw assembly 11 and the guide rail slider 8b by threaded matching, and the sliding guide rail 8a and the guide rail slider 8b are slidingly matched.

[0042] The function of the microscope mechanism 3 is to observe the relative position between the center of the optical element 21 and the center of the microscope 14, which is used for subsequent adjustment of the position of the optical element. This assembly is composed of a microscope 14 and a microscope stand 15. This assembly is connected to the bed stand 1 by threading.

[0043] The rotating spindle mechanism 4 is a device for driving the optical element 21 to position and rotate. According to the torque of the fourth servo motor 25, the adjusting slides 23 and 24 are driven to rotate, so that the inner support fixture 22 is rotated and then the optical element 21 is driven to rotate. According to the observation result of the microscope mechanism 3, the adjusting slide is driven by the thread differential fine adjustment positioning mechanism 5 to perform two mutually perpendicular linear motions to drive the inner support fixture 22 to move in the plane, and then the optical element 21 is adjusted and positioned. This structure is composed of the optical element 21, the inner support fixture 22, the first adjustment slide 23, the second adjustment slide 24, and the fourth servo motor 25. The fourth servo motor 25 and the base are fixed to the bed frame 1 by threaded connection, the inner support fixture 22 and the optical element 21, the adjusting slides 23 and 24 are fixed by the clamp outward extension and threaded connection respectively, and the adjusting slides 23 and 24 are fixed to the base by threaded connection.

[0044] The function of the thread differential fine adjustment positioning mechanism 5 is to receive the torque transmitted by the differential adjustment driving part 6 using the shift fork through the locking ring. According to the observation result of the microscope mechanism 3, the rotation of the differential screw 28 drives the nut seat 26 and the adjustment slides 23 and 24 to perform linear motion. This structure is composed of the nut seat 26, the locking ring 27, and the differential screw 28. The shaft sections with smaller diameters at both ends of the differential screw 28 have the same thread rotation direction and a pitch of 1.5mm, and the shaft ends with larger diameters in the middle have threads that are opposite to the two ends, and the pitch is 1.4mm. The thread differential fine adjustment positioning mechanism 5 is fixed to the adjustment slides 23 and 24 by threaded connection, the nut seat 26 is matched with the adjustment slides 23 and 24 by threaded connection, and the locking ring 27 is fixed to the differential screw 28 by key connection.

[0045] The function of the differential adjustment drive part 6 is to provide torque for the thread differential fine adjustment positioning mechanism 5. The motor 16 drives the third servo motor 19 connected to the column screw nut 18 for the third ball screw assembly 17 to perform linear motion. The third servo motor 19 transmits torque through the contact between the fork 20 and the locking ring 27. This assembly is composed of the motor 16, the third ball screw assembly 17, the column screw nut 18, the third servo motor 19, and the fork 20. The third ball screw assembly 17 is fixed to the motor 16 and the bed frame 1 by threaded connection, the column screw nut 18 and the third servo motor 19 are threadedly connected, and the third servo motor 19 and the fork 20 are keyed and fixed.

[0046] The working principle of the present invention is:

[0047] The optical element 21 is placed on the inner support fixture 22, and the inner support fixture 22 is opened to fix the optical element 21. The relative position between the center of the optical element 21 and the center of the lens is observed through the microscope 14 to determine the centering method. Then the differential adjustment drive part 6 is started to generate the torque fork 20 and approach the locking ring 27 of the thread differential adjustment positioning mechanism 5. The contact causes the differential screw 28 to rotate. Since the thread of the middle shaft section and the end shaft section have opposite rotation directions, the thread rotation direction of the opening of the nut seat 26 is the same as that of the middle shaft section, and the thread rotation direction of the opening of the base at both ends of the shaft is the same as that of the two ends of the shaft. The screw rotates one circle to move the screw as a whole by 1.5mm, while the distance moved by the nut seat 26 is relatively reduced by 1.4mm. In this way, when the differential screw 28 rotates one circle, the nut seat 26 drives the adjustment slides 23 and 24 to move linearly by only 0.1mm. The device has two differential screws 28 and adjustment slides 23 and 24 in the same direction and perpendicular to each other, which can realize the precise adjustment and positioning of the optical element 21 in the plane. The optical element 21 can be further processed by the cutting mechanism 2 .

[0048] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0049] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above-described embodiments, those skilled in the art should understand that any person skilled in the art can still modify the technical solutions described in the above-described embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or perform equivalent replacements on some of the technical features thereof; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention. They should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A shaft-hole optical element processing machine tool with thread differential fine adjustment positioning, characterized in that: It comprises a bed frame (1), a cutting knife mechanism (2), a microscope mechanism (3), a rotating spindle mechanism (4), a thread differential fine adjustment positioning mechanism (5), and a differential adjustment driving part (6); The cutter mechanism (2), microscope mechanism (3), rotating spindle mechanism (4), and differential adjustment driving part (6) are respectively fixed on the bed frame (1); The position of the optical element is adjusted by the microscope mechanism (3), and the differential adjustment drive part (6) provides torque for the thread differential fine adjustment positioning mechanism (5), thereby enabling the rotating spindle mechanism (4) to cooperate with the cutter mechanism (2) to perform positioning and rotation processing of the optical element.

2. The shaft-hole optical element processing machine tool with thread differential fine adjustment positioning according to claim 1, characterized in that: The cutting mechanism comprises a first servo motor (7), a first ball screw assembly (8), a tool holder base plate (9), a second servo motor (10), a second ball screw assembly (11), a tool holder (12) and a tool (13), wherein the first servo motor (7) drives the first ball screw assembly (8) to control the tool holder base plate (9) to perform linear motion; The tool (13) is mounted on the tool holder (12), the tool holder (12) is mounted on the second ball screw assembly (11), and the second servo motor (10) drives the second ball screw assembly (11) to move, and drives the tool holder (12) to drive the tool (13) to move.

3. The shaft-hole optical element processing machine tool with thread differential fine adjustment positioning according to claim 2, characterized in that: The first ball screw assembly (8) comprises a sliding guide rail (8a), a guide rail slider (8b), a column nut seat (8c), and a ball screw base (8d); The sliding guide rail (8a) and the ball screw base (8d) are fixed on the bed frame (1), and the guide rail slider (8b) and the column nut seat (8c) are connected to the tool holder bottom plate (9).

4. The shaft-hole optical element processing machine tool with thread differential fine adjustment positioning according to claim 1, characterized in that: The microscope mechanism (3) comprises a microscope (14) and a microscope frame (15), wherein the microscope (14) is mounted on the microscope frame (15); the position of the optical element (21) is adjusted by observing the relative position between the center of the microscope (14) and the center of the optical element (21).

5. The shaft-hole optical element processing machine tool with thread differential fine adjustment positioning according to claim 1, characterized in that: The rotating spindle mechanism (4) comprises an optical element (21), an inner support fixture (22), a first adjustment slide (23), a second adjustment slide (24), and a fourth servo motor (25); The optical element (21) is arranged on an inner support fixture (22), the inner support fixture (22) is arranged on a first adjustment slide (23), the first adjustment slide (23) and the second adjustment slide (24) are connected to each other, and the fourth servo motor (25) is fixed on the bed frame (1).

6. The shaft-hole optical element processing machine tool with thread differential fine adjustment positioning according to claim 5, characterized in that: The fourth servo motor (25) drives the first adjustment slide (23) and the second adjustment slide (24) to rotate, so that the inner support fixture (22) rotates and then drives the optical element (21) to rotate.

7. The shaft-hole optical element processing machine tool with thread differential fine adjustment positioning according to claim 1, characterized in that: The thread differential fine adjustment positioning mechanism (5) comprises a nut seat (26), a locking ring (27), and a differential screw (28); the nut seat (26) and the first adjustment slide (23) are connected to each other in a cooperative manner, and the locking ring (27) and the differential screw (28) are connected and fixed; The differential screw (28) rotates to drive the nut seat (26) and the first adjustment slide (23) to perform linear motion.

8. The shaft-hole optical element processing machine tool with thread differential fine adjustment positioning according to claim 1, characterized in that: The differential adjustment driving part (6) comprises a motor (16), a third ball screw assembly (17), a column screw nut (18), a third servo motor (19), and a shift fork (20); The motor (16) and the third ball screw assembly (17) are fixed on the bed frame (1), the column nut (18) and the third servo motor (19) are connected in a coordinated manner, and the shift fork (20) is arranged on the third servo motor (19).

9. The shaft-hole optical element processing machine tool with thread differential fine adjustment positioning according to claim 8, characterized in that: The motor (16) drives a third servo motor (19) connected to a column screw nut (18) through the third ball screw assembly (17) to perform linear motion, and transmits torque through contact between the shift fork (20) and the locking ring (27).

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