Aspheric surface shape detection device based on closest circle

Abstract

The utility model relates to the technical field of spherical surface monitoring equipment, and discloses an aspheric surface shape detection device based on a closest circle, which comprises a bottom plate, a rotary table, a grating ruler, a straightness measuring instrument and a detection table, the front wall of the grating ruler is fixedly connected with the straightness measuring instrument, the top of the bottom plate is fixedly connected with a support plate, and the front wall of the support plate is fixedly connected with the rotary table. The top of the supporting plate is connected with a grating ruler in a sliding mode, the side wall of the grating ruler is connected with a fine adjustment lead screw in a rotating mode, the fine adjustment lead screw is connected with the supporting plate in a threaded mode, the front wall of the rotary table is fixedly connected with an installation plate, and the two sides of the front wall of the installation plate are provided with a rack and a sliding rail respectively. Due to the fact that the clamping force applied to the workpiece is driven by the weight of the workpiece, and the weight of the workpiece is in positive correlation with the thickness of the workpiece, the situation that the workpiece is deformed and a detection result is interfered due to the fact that the clamping force is excessive can be avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of spherical monitoring equipment, and specifically relates to a non-spherical surface shape detection device based on the closest circle. Background Technique

[0002] Due to the excellent performance of aspherical optical elements, the demand for them in various high-precision optical systems is becoming increasingly urgent. However, due to the complexity of aspherical processing and detection, the wide application of these elements is restricted. There are some obvious problems in the existing aspherical detection technologies: some methods are simple and easy to implement, but the detection accuracy is limited; while some methods with higher accuracy are often too complex, with low detection efficiency, high cost, and lack of universality. In addition, the existing aspherical detection instruments on the market are expensive and have low detection efficiency, making it difficult to meet diverse needs.

[0003] The utility model patent with the publication number CN209623643U discloses a non-spherical surface shape detection device based on the closest circle theory, which includes a turntable, a grating ruler, a linear gauge, and a detection table. A support plate is fixedly connected to the top of the bottom plate, a turntable is fixedly connected to the side wall of the support plate, a grating ruler is slidably connected to the top of the support plate, a fine adjustment lead screw is rotatably connected to the side wall of the grating ruler, and the fine adjustment lead screw is threadedly connected to the support plate. An electric slide rail is fixedly connected to the front wall of the turntable, a fixing plate is slidably connected in the electric slide rail, a workpiece mounting table is fixedly connected to the top of the fixing plate, a clamping jaw is slidably connected in the workpiece mounting table, a fastening ring is threadedly connected to the outer wall of the clamping jaw, a group of soft irons are fixedly arranged in the workpiece mounting table, a copper block is fixedly arranged between the soft irons, a permanent magnet is rotatably connected in the middle of the soft irons, a rotating shaft is fixedly connected to the side wall of the permanent magnet. Although the workpiece can be fixed, it is easy to apply too large a clamping force to the workpiece during fixation, resulting in deformation of the workpiece. Therefore, this application proposes a non-spherical surface shape detection device based on the closest circle. Content of the Utility Model

[0004] To solve the problems raised in the above-mentioned background art, the present utility model provides the following technical solutions: A non-spherical surface shape detection device based on the closest circle, comprising: a bottom plate, a turntable, a grating scale, a linear gauge, and a detection table. A linear gauge is fixedly connected to the front wall of the grating scale. A support plate is fixedly connected to the top of the detection table, and a turntable is fixedly connected to the front wall of the support plate. The grating scale is slidably connected to the top of the support plate. A fine adjustment lead screw is rotatably connected to the side wall of the grating scale, and the fine adjustment lead screw is threadedly connected to the support plate. An installation plate is fixedly connected to the front wall of the turntable. A rack and a slide rail are respectively installed on both sides of the front wall of the installation plate. One side of the detection table is slidably connected to the slide rail through a slider, and the other side is meshed with the rack through a gear. The gear is driven by a motor, and the motor is installed at the bottom of the detection table. A clamping mechanism is provided on the detection table. The clamping mechanism includes a base. A plurality of clamping jaws are provided on the base. A cavity is provided inside the base. Connecting rods fixedly connected to the bottoms of the clamping jaws are provided inside the cavity. The connecting rods have a rotating end and an operating end. The rotating end is rotatably connected to a support plate inside the base. A pressing rod is slidably inserted through the center of the base. The operating ends are respectively connected to the pressing rod through connecting rings. A first spring is provided at the bottom of the pressing rod.

[0005] Further, limiting structures are provided at both ends of the slide rail, and a reversible meshing structure is provided at both ends of the rack.

[0006] Further, the reversible meshing structure includes a single-tooth unit. The two side walls of the single-tooth unit are respectively connected to the two side walls of the rack through second springs.

[0007] Further, the tops of the support plates are all connected to the top wall of the base. An activity groove is provided between two adjacent support plates, and a clamping jaw is provided inside the activity groove.

[0008] Further, a handwheel is fixedly connected to the end of the fine adjustment lead screw.

[0009] Further, a rubber strip is provided on the clamping jaw, and horizontal anti-slip edges are provided on the rubber strip.

[0010] Technical effects:

[0011] The pressing rod is pressed down by the weight of the workpiece itself, so that the pressing rod can drive the clamping jaws to approach and clamp the workpiece through the connecting rods. Since the clamping force applied to the workpiece is driven by the weight of the workpiece itself, and the weight of the workpiece is positively correlated with its thickness, it is possible to avoid excessive clamping force causing workpiece deformation and interfering with the detection results. Description of the drawings

[0012] The drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. They are used together with the embodiments of the present utility model to explain the present utility model and do not constitute a limitation to the present utility model. In the drawings:

[0013] Figure 1 is a front view structural schematic diagram of the whole of the present utility model;

[0014] Figure 2 is a side view structural schematic diagram of the whole of the present utility model;

[0015] Figure 3 is a sectional view structural schematic diagram of the base part of the present utility model;

[0016] Figure 4 is the present utility model Figure 1 is an enlarged structural schematic diagram of part A in;

[0017] In the figure:

[0018] 1. Turntable; 2. Grating ruler; 3. Linear gauge; 4. Detection table; 5. Support plate; 6. Fine adjustment lead screw; 7. Mounting plate; 8. Rack; 9. Slide rail; 10. Gear; 11. Motor; 12. Base; 13. Jaw; 14. Link; 14a. Rotating end; 14b. Operating end; 15. Pressing rod; 16. Connecting ring; 17. First spring; 18. Single-tooth unit; 19. Second spring; 20. Support plate; 21. Handwheel. Specific embodiments

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments; based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0020] Such as Figures 1-4As shown in the figure, a non-spherical surface shape detection device based on the closest circle provided by this specific embodiment includes: a bottom plate, a turntable 1, a grating scale 2, a linear gauge 3, and a detection table 4. The front wall of the grating scale 2 is fixedly connected to the linear gauge 3. The top of the bottom plate is fixedly connected to a support plate 5. The front wall of the support plate 5 is fixedly connected to the turntable 1. The top of the support plate 5 is slidably connected to the grating scale 2. The side wall of the grating scale 2 is rotatably connected to a fine adjustment lead screw 6. The fine adjustment lead screw 6 is threadedly connected to the support plate 5. It is characterized in that: the front wall of the turntable 1 is fixedly connected to a mounting plate 7. On both sides of the front wall of the mounting plate 7, a rack 8 and a slide rail 9 are respectively installed. One side of the detection table 4 is slidably connected to the slide rail 9 through a slider, and the other side is meshed and connected to the rack 8 through a gear 10. The gear 10 is driven by a motor 11. The motor 11 is installed at the bottom of the detection table 4. A clamping mechanism is arranged on the detection table 4. The clamping mechanism includes a base 12. A plurality of clamping jaws 13 are arranged on the base 12. There is a cavity inside the base 12. Inside the cavity, connecting rods 14 fixedly connected to the bottoms of the clamping jaws 13 are arranged. The connecting rod 14 has a rotating end 14a and an operating end 14b. The rotating end 14a is rotatably connected to a support plate 20 inside the base 12. A pressing rod 15 is slidably inserted through the center of the base 12. The operating ends 14b are respectively connected to the pressing rod 15 through connecting rings 16. A first spring 17 is arranged at the bottom of the pressing rod 15.

[0021] Limit structures are arranged at both ends of the slide rail 9, and a reversible meshing structure is arranged at both ends of the rack 8.

[0022] The reversible meshing structure includes a single-tooth unit 18. The two side walls of the single-tooth unit 18 and the two side walls of the rack 8 are respectively connected by a second spring 19. When the slider moves to a position where it abuts against the limit structure, the gear 10 meshes with the single-tooth unit 18. The continuous rotation of the gear 10 can only compress the second spring 19. After the second spring 19 deforms, it generates vibration and resets, so that the gear 10 and the single-tooth unit 18 cannot generate meshing transmission. Control the motor 11 to rotate in the reverse direction, and the reverse rotation of the gear 10 can be meshed and transmitted through the single-tooth unit 18 and the rack 8.

[0023] The tops of the support plates 20 are all connected to the top wall of the base 12. An activity groove is opened between two adjacent support plates 20. The clamping jaws 13 are arranged inside the activity groove.

[0024] A handwheel 21 is fixedly connected to the end of the fine adjustment lead screw 6.

[0025] Anti-slip strips are arranged on the clamping jaws 13, and horizontal anti-slip edges are arranged on the anti-slip strips.

[0026] Working principle: Place the workpiece in the middle of the jaws 13. The workpiece presses down on the pressing rod 15 due to its own gravity. The pressing rod 15 moves downward, compressing the first spring 17, and drives the jaws 13 to tilt and approach the center through the connecting rod 14, clamping the workpiece. Since the weight of the workpiece is positively correlated with its thickness, a larger clamping force can be applied to the thicker workpiece according to the weight of the workpiece itself. After fixing the workpiece, drive the detection table 4 to move up or down along the slide rail 9 through the meshing transmission of the motor 11, the gear 10 and the rack 8. Then rotate the handwheel 21 forward or backward to precisely adjust the measuring probe to the appropriate position. Then turn on the turntable 1 to rotate it, driving the detection table 4 and the workpiece to swing to measure the required values and complete the measurement. The coarse adjustment is combined with the fine adjustment screw rod 6 to facilitate quickly and accurately finding the position. The device has accurate and simple measurement, a simple instrument structure, reduces the detection cost, improves the versatility. After the measurement is completed, lift the workpiece directly to take it out. The pressing rod 15 automatically returns under the elastic force of the first spring 17, facilitating the detection operation of the next workpiece.

[0027] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0028] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A non-spherical surface shape detection device based on the closest circle, comprising: A base plate, a turntable (1), a grating ruler (2), a linear measuring instrument (3) and a detection platform (4), wherein the front wall of the grating ruler (2) is fixedly connected to the linear measuring instrument (3), the top of the base plate is fixedly connected to a support plate (5), the front wall of the support plate (5) is fixedly connected to the turntable (1), the top of the support plate (5) is slidably connected to the grating ruler (2), the side wall of the grating ruler (2) is rotatably connected to a fine-tuning screw (6), the fine-tuning screw (6) is threadedly connected to the support plate (5), and is characterized in that: the front wall of the turntable (1) is fixedly connected to a mounting plate (7), the front walls of the mounting plate (7) are respectively installed with a rack (8) and a slide rail (9), one side of the detection platform (4) is slidably connected to the slide rail (9) through a slider, and the other side is meshedly connected to the rack (8) through a gear (10), and the gear (10) is meshed with the rack (8) through a gear (10). The detection platform (4) is driven by a motor (11), the motor (11) being mounted on the bottom of the detection platform (4), the detection platform (4) being provided with a clamping mechanism, the clamping mechanism comprising a base (12), the base (12) being provided with a plurality of clamping claws (13), the base (12) having a cavity therein, the cavity being provided with connecting rods (14) respectively fixed to the bottom of the clamping claws (13), the connecting rod (14) having a rotating end (14a) and an operating end (14b), the rotating end (14a) being rotatably connected to a support plate (20) in the base (12), a pressing rod (15) being slidably connected to the center of the base (12), the operating end (14b) being respectively connected to the pressing rod (15) through a connecting ring (16), and a first spring (17) being provided at the bottom of the pressing rod (15).

2. The aspheric surface shape detection device based on the closest circle according to claim 1, characterized in that: Both ends of the slide rail (9) are provided with limit structures, and both ends of the rack (8) are provided with reversible meshing structures.

3. The aspheric surface shape detection device based on the closest circle according to claim 2, characterized in that: The reversible meshing structure comprises a single-tooth unit (18), and two side walls of the single-tooth unit (18) are connected to two side walls of the rack (8) via second springs (19) respectively.

4. The aspheric surface shape detection device based on the closest circle according to claim 3, characterized in that: The tops of the support plates (20) are connected to the top wall of the base (12), and a movable groove is provided between two adjacent support plates (20), wherein a clamping claw (13) is provided in the movable groove.

5. The aspheric surface shape detection device based on the closest circle according to claim 4, characterized in that: The end of the fine-tuning lead screw (6) is fixedly connected to a hand wheel (21).

6. The aspheric surface shape detection device based on the closest circle according to claim 5, characterized in that: The clamping jaw (13) is provided with a rubber strip, and the rubber strip is provided with a horizontal anti-slip edge.

Images