Optical curve grinding machine and clamp for preparing sample notch by using optical curve grinding machine

Abstract

The invention provides a clamp for preparing an impact sample notch by using an optical curve grinding machine and the optical curve grinding machine, and belongs to the technical field of optical curve grinding machines. The jig of the present invention comprises: a base plate; a base; the lower chuck is arranged at the lower part of the base and on the bottom plate; one end of the upper chuck extends into the base and can slide in the base, and the other end of the upper chuck is located outside the base; the spring compression head is located in the base, and one end is connected with one end of the upper chuck; one end of the ejector rod extends into the base, and the other end of the ejector rod is located outside the base and used for extruding the other end of the spring compression head. The spring compression head is driven by the ejector rod to drive the upper chuck to move, so that the device can adapt to different sample sizes, and meanwhile, machining of various machine tools such as an optical curve grinding machine is facilitated. The optical curve grinding machine comprises the clamp and the grinding wheel dresser. According to the shape of the grinding wheel trimmed by the grinding wheel trimmer, errors of the shape and the size of a machined impact notch can be smaller, and the impact test result is stable.

Description

Technical Field

[0001] The invention relates to the technical field of optical curve grinders, and in particular to a fixture for preparing a notch of an impact specimen using an optical curve grinder and an optical curve grinder comprising the fixture. Background Art

[0002] Impact test is a commonly used material mechanics test method. It tests the behavior of materials or products under instantaneous impact force by simulating the impact conditions that may be encountered in actual use. Its main purpose is to determine the toughness and impact resistance of the material, as well as to evaluate its safety, reliability and effectiveness when subjected to external force collision or action. The Charpy pendulum impact test is a commonly used acceptance criterion in industrial applications. Generally, the specimen is a 55×10×10mm cuboid with a V-shaped or U-shaped notch in the middle of the specimen length. However, the machining accuracy of the impact specimen, especially the accuracy of the notch shape and size, will directly affect the test results of the impact test. Generally speaking, if the sample is prepared according to the standard requirements and the error value of the notch shape and dimensional accuracy is minimized, the influence of the specimen processing on the mechanical properties of the material can be minimized, and the test results are relatively stable and accurate.

[0003] There are four main methods for processing notches: ① Optical grinding method, on an optical projection grinder, use a forming grinding wheel to process the impact specimen notch; ② Wire cutting method, use a programmable wire cutting machine to process the impact specimen notch according to the compiled process program; ③ Milling machine method, use a special fixture and forming knife on the milling machine to mill the impact specimen notch; ④ Broaching machine method, use a broaching machine to process the impact specimen notch in one step. Among them, the optical grinding method has the best quality of processing notches, but it requires frequent grinding of the grinding wheel, and it is necessary to select grinding wheels of different sizes and types according to different materials. This method is not often used in large-scale production, but can be used in scientific research and arbitration. Wire cutting method, due to the effect of electric sparks, inevitably produces a very thin impact layer at the bottom of the notch, which affects the impact work. It can generally be used to process notches of difficult-to-process materials such as austenitic steel or die-cast alloys with high strength or hardness. Enterprises generally use machining or broaching methods to process notches. Machining methods can process more specimens at a time and have high work efficiency, but they have strict requirements on the uniformity of specimen size, especially the consistency of specimen length and cross-section, which has high requirements for ensuring the stability of specimen clamping; broaching machines process a single specimen, and the processing load is gradually shared by the teeth of the broach, which causes less wear on the tool and has looser requirements on the consistency of specimen size, but the processing efficiency is low.

[0004] In summary, the use of an optical curve grinder is a method for preparing high-quality impact specimen notches, but the specimen needs to be kept stable during use, which requires a powerful clamping device and easy replacement of wearing parts for easy maintenance. In addition, there is a lack of a quick and accurate way to dress the grinding wheel during use to ensure that the shape and angle of the grinding wheel meet the requirements, thereby achieving low error and smooth impact specimen notch preparation. Summary of the invention

[0005] In view of this, in order to solve the technical problem of the lack of a powerful clamping device for impact specimens in the prior art, in the first aspect, the present invention provides a fixture for preparing notches of impact specimens using an optical curve grinder. The upper chuck is driven to move by a spring compression head driven by a push rod, which can adapt to different specimen sizes and is also conducive to the processing of various machine tools such as optical curve grinders.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A fixture for preparing a notch of an impact specimen using an optical curve grinder, comprising:

[0008] Base plate;

[0009] A base, disposed on the bottom plate;

[0010] A lower chuck, disposed on the lower portion of the base and the bottom plate, having a U-shaped notch;

[0011] An upper chuck, one end of which extends into the base and can slide in the base, and the other end of which is located outside the base and has a U-shaped notched inclined surface;

[0012] A spring compression head is located in the base, one end of which is connected to one end of the upper clamp;

[0013] A push rod has one end extending into the base and the other end located outside the base, and is used to compress the other end of the spring compression head.

[0014] Preferably, a first dovetail groove is provided on the vertical surface of the lower clamp, and a first insert strip is provided in the first dovetail groove;

[0015] A second dovetail groove is provided on the inner side of the upper clamp and on a side opposite to the lower clamp, and a second insert strip is arranged in the second dovetail groove.

[0016] Preferably, the push rod is threadedly connected to the base.

[0017] Preferably, a spherical contact point is provided at one end of the push rod.

[0018] Preferably, a mounting hole is formed at the other end of the push rod.

[0019] Preferably, the base and the top rod are encapsulated by a base right cover plate.

[0020] In order to solve the technical problem of grinding wheel shape and angle correction when an optical curve grinder processes the notch of an impact specimen, in a second aspect, the present invention provides an optical curve grinder, including a grinding wheel dresser and the above-mentioned fixture.

[0021] Preferably, the grinding wheel dresser comprises:

[0022] Indexing plate;

[0023] A rotating seat, which is arranged on the indexing plate and can rotate on the indexing plate;

[0024] A base is fixed on the rotating seat, a first through hole for the rack to pass through is opened on the side thereof, and a second through hole for the central axis to pass through is opened on the upper portion thereof;

[0025] a gear, disposed on the central shaft and meshing with the rack;

[0026] A fixed head, arranged at one end of the rack outside the base;

[0027] The diamond pen is arranged on the fixed head.

[0028] Preferably, a circular guide rail and a cylindrical shaft are provided on the dividing plate;

[0029] The bottom end of the rotating seat is provided with a cylindrical groove matched with the cylindrical shaft, and the bottom end of the rotating seat is provided with a groove slidably connected with the circular guide rail.

[0030] Preferably, it also includes a knob connected to an end of the central axis away from the rack.

[0031] The fixture for preparing the notch of an impact specimen using an optical curve grinder provided by the present invention can adapt to different specimen sizes by driving the spring compression head through the push rod, and is also convenient for processing by various machine tools such as optical curve grinders. Compared with the prior art, it has the following beneficial effects:

[0032] The present invention can fix the impact sample with a notch to be processed on a processing workbench, and by arranging an upper chuck with an inclined surface and a lower chuck with a right angle, the fixture can be adapted to different sample sizes by adjusting the ejector rod, and is also convenient for processing by various machine tools such as optical curve grinders.

[0033] By setting U-notches on the upper and lower chucks, the light of the optical curve grinder can pass through, forming a clear projection image, so that the operator can clearly and accurately observe and analyze the shape and size of the sample notch, and make more precise adjustments and controls. At the same time, it is also convenient for processing the notch.

[0034] The invention provides a push rod and a spring compression head with a compression spring, so that the sample can be loaded and unloaded with relatively less effort, and the upper and lower clamps can clamp the sample effectively to prevent loosening during the process of machining the notch.

[0035] The present invention provides dovetail groove structures that are easy to replace at vulnerable parts of the upper and lower clamps, and arranges wear-resistant inserts with high hardness in the dovetail grooves, so that the vulnerable parts are easy to replace parts and the clamp has a longer service life.

[0036] The grinding wheel dresser provided by the present invention has the following beneficial effects compared with the prior art:

[0037] Since there are two types of impact notches, U-shaped and V-shaped, the notch shape needs to be changed as needed, and the grinding wheel will wear out due to repeated use, which will cause the notch shape to change. The grinding wheel dresser can quickly and easily dress the shape of the grinding wheel, which is beneficial for optical curve grinders and other machine tools to process standard impact notches.

[0038] The shape of the grinding wheel trimmed by the grinding wheel dresser can make the shape and size error of the processed impact notch smaller, making the impact test results stable and reliable, and can be used for scientific research, arbitration, etc.

[0039] All parts of the grinding wheel dresser are fixed with screws or pins for easy maintenance and replacement. Copper gaskets can be set on the base on the back of the rack to tighten the rack when it is loose, so that the rack and gear can be stably engaged.

[0040] By arranging a dividing plate, a rotating seat and a base, the rotating seat can drive the base when rotating on the dividing plate, and the diamond pen can be rotated to different angles, so as to facilitate trimming of the required grinding wheel shape.

[0041] The knob, gear and rack can be easily rotated to extend the diamond pen to different lengths, making it easy to adjust the position of the pen when dressing the grinding wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is the main view of the fixture;

[0043] Figure 2 is a top sectional view of the fixture;

[0044] Figure 3 This is the right view of the base;

[0045] Figure 4 It is a top view of the base plate and the pedestal;

[0046] Figure 5 This is the front view of the base plate and the pedestal;

[0047] Figure 6 is a stereoscopic diagram of a grinding wheel dresser;

[0048] Figure 7 It is the front view of the rotating seat;

[0049] Figure 8 It is a top view of the rotating seat;

[0050] Fig. 9 It is a side cross-sectional view of the base;

[0051] In the figure, 1, bottom plate; 2, base; 3, upper chuck; 4, lower chuck; 5, push rod; 6, spring compression head; 7, first dovetail groove; 8, first inlay; 9, second dovetail groove; 10, second inlay; 11, U-shaped notch; 12, dividing plate; 13, rotating seat; 14, base; 15, rack; 16, fixed head; 17, diamond pen; 18, knob; 19, right cover of base. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0053] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the 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 position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0054] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] like Figure 1-5 As shown, the present invention provides a fixture for preparing a notch of an impact specimen using an optical curve grinder, comprising:

[0056] The bottom plate 1 is preferably provided with a U-shaped groove for convenient clamping on the processing worktable of the optical curve grinder.

[0057] The base 2 is arranged on the bottom plate 1, and its upper outer surface can be arc-shaped or square-shaped, which can be selected according to needs.

[0058] The lower chuck 4 is arranged at the lower part of the base 2 and on the bottom plate 1 and has a U-shaped notch 11;

[0059] An upper chuck 3, one end of which extends into the base 2 and can slide in the base 2, and the other end of which is located outside the base 2 and has an inclined surface with a U-shaped notch 11;

[0060] The spring compression head 6 is located in the base 2, and one end is connected to one end of the upper clamp 3. Preferably, the left side of the spring compression head 6 is connected to the upper clamp 3, a compression spring is provided in the middle section, and the right side is close to, in contact with, or connected to the ejector rod 5 described below, which can be selected according to needs.

[0061] A push rod 5 has one end extending into the base 2 and the other end located outside the base 2 for pressing the other end of the spring compression head 6 .

[0062] In the present invention, a first dovetail groove 7 is provided on the vertical surface of the lower clamp 4, and a first insert strip 8 is provided in the first dovetail groove 7;

[0063] A second dovetail groove 9 is provided on the inner side of the upper clamp 3 and on a side opposite to the lower clamp 4 , and a second insert strip 10 is provided in the second dovetail groove 9 .

[0064] The first insert strip 8 and the second insert strip 10 are preferably wear-resistant insert strips with high hardness.

[0065] In the present invention, the push rod 5 is threadedly connected to the base 2 .

[0066] In the present invention, a spherical contact point is provided at one end of the push rod 5 .

[0067] In the present invention, a mounting hole is provided at the other end of the push rod 5. An external lever can be added to rotate the thread with less effort.

[0068] In the present invention, the base 2 and the push rod 5 are enclosed by the base right cover 19. That is, the upper chuck 3, the spring compression head 6, and the push rod 5 are assembled from left to right in the base 2 and enclosed by the base right cover 19. The base right cover 19 is assembled on the right side of the base 2 by screws, and a threaded through hole is provided inside. The push rod 5 is screwed with the threaded through hole and the through hole in the base 2. By tightening the push rod 5 to squeeze the spring compression head 6, the upper chuck 3 is moved, and then the gap between the upper chuck 3 and the lower chuck 4 is adjusted to adapt to different impact specimen sizes.

[0069] The present invention provides a U-shaped groove on the bottom plate 1, which can be bolted to the groove of the processing work surface, so as to fix the fixture on the processing work surface of the optical curve grinder. The work surface is equipped with a three-axis linkage, which can move the fixture to a desired position in the horizontal and vertical directions.

[0070] The threaded transmission of the push rod 5 is tightened to the left through an external lever, pushing the spherical contact point, driving the spring compression head 6, and then driving the upper chuck 3 to slide to the left to adapt to impact specimens of different sizes. The compression spring is compressed and tightened, and a gap is left between the upper chuck 3 and the lower chuck 4, in which the sample block can be placed, that is, the sample is placed horizontally in the gap between the upper chuck 3 and the lower chuck 4.

[0071] The optical curve grinder drives the grinding wheel to rotate, prepares a notch at the required position on the impact specimen, and projects the notch shape onto the screen of the optical curve grinder through light and shadow.

[0072] After the notch of the impact specimen is prepared, the external lever causes the thread of the push rod 5 to unload force to the right, the spring compression head 6 slides to the right, the compression spring is released, the upper chuck 3 rebounds and tightens, and the specimen is pressed into the gap between the upper chuck 3 and the lower chuck 4 with the inclined surface, thereby achieving stable clamping of the specimen.

[0073] It should be noted that the clamp of the fixture is designed with the upper clamp 3 being an inclined surface and the lower clamp 4 being a right angle. This matching mode can enhance the adaptability of the fixture to specimens of different sizes. The main reasons are as follows:

[0074] (1) Clamping characteristics of inclined surfaces

[0075] Increase contact area: The inclined design enables the chuck to form a larger contact area with the sample surface when clamping the sample, which helps to disperse the clamping force and reduce the pressure on the sample surface, thereby preventing the sample from being damaged due to excessive clamping force.

[0076] Self-locking effect: The inclined surface will produce a certain self-locking effect during the clamping process. When the inclined surface is subjected to vertical downward pressure, the chuck will generate an inward force due to the existence of the inclined surface. This force helps to clamp the sample tightly and prevent the sample from moving or falling off during processing.

[0077] (2) Positioning function of right angles

[0078] Precise positioning: As part of the fixture, the right-angle edge can provide a precise positioning point. When clamping the sample, the right-angle edge can contact a specific part of the sample (such as an edge, corner, etc.), thereby ensuring that the position of the sample in the fixture is accurate.

[0079] Enhanced stability: The presence of the right angle makes the fixture more stable when clamping the specimen. Since the contact area between the right angle and the specimen is relatively small, it can generate greater friction, helping to prevent the specimen from sliding or tilting during processing.

[0080] (3) Advantages of the combination of inclined plane and right angle edge

[0081] Flexible adjustment: The inclined surface design of the upper clamp 3 enables the clamp to flexibly adjust the size and direction of the clamping force. By changing the inclination angle of the inclined surface or applying different pressures, samples of different sizes and shapes can be clamped.

[0082] Strong adaptability: Due to the combination of the bevel and the right-angle edge, the fixture can adapt to specimens of different sizes. When the specimen size is small, the bevel can fit the specimen surface more closely; when the specimen size is large, the right-angle edge can provide stable support and positioning.

[0083] Easy to operate: This design makes the clamp easier and faster to operate. The operator only needs to adjust the position of the clamp and apply appropriate pressure to clamp and position different samples.

[0084] In summary, the upper chuck 3 of the clamp is an inclined surface, and the lower chuck 4 is a right angle. By combining the clamping characteristics of the inclined surface and the positioning function of the right angle side, the clamp can flexibly adapt to specimens of different sizes, thereby improving processing efficiency and processing accuracy.

[0085] The main material of the clamp is preferably a high-temperature alloy, and can also be other high-temperature resistant metal materials, which can be selected according to actual needs.

[0086] When the fixture is used for a long time, the parts where the upper and lower clamps 4 contact the sample are subjected to greater force and are easily damaged. A dovetail groove can be set at this vulnerable part and replaced with a wear-resistant and hardened insert. The insert can be pushed from the side to replace the vulnerable parts.

[0087] like Figure 6-9 As shown, in order to solve the technical problem of grinding wheel shape and angle correction when an optical curve grinder processes the notch of an impact specimen, in a second aspect, the present invention provides an optical curve grinder, including a grinding wheel dresser and the above-mentioned fixture.

[0088] In the present invention, the grinding wheel dresser comprises:

[0089] The indexing plate 12 is preferably provided with two U-shaped grooves on the left and right sides of the indexing plate 12, which can be bolted to the grooves of the processing work surface of the optical curve grinder to fix the grinding wheel dresser on the work surface. The work surface is equipped with a three-axis linkage, which can move the grinding wheel dresser to the desired position in the horizontal and vertical directions.

[0090] The rotating seat 13 is arranged on the indexing plate 12 and can rotate on the indexing plate 12. The rotating seat 13 preferably comprises a disc and a cylindrical support block, the disc is slidably connected to the indexing plate 12, and the base 14 is fixed to the cylindrical support block of the rotating seat 13 by pins.

[0091] The base 14 is fixed on the rotating seat 13, and a first through hole for the rack 15 to pass through is provided on its side, and a second through hole for the central axis to pass through is provided on its upper part. Among them, an upper cover can also be provided on the base 14, and screw holes are provided on both sides to fix the upper cover. The first through hole is preferably a square through hole to adapt to the shape of the rack 15. A cylindrical groove is preferably provided in the middle of the base 14, and the central axis and the gear described below are located in the cylindrical groove, and the square through hole is communicated with the cylindrical groove. Two copper gaskets are preferably provided on the back of the rack 15 near the base 14, and the copper gaskets are used to make the rack 15 tightly mesh with the gear described below.

[0092] The gear is arranged on the central axis and meshes with the rack 15. The rotation of the gear drives the rack 15 to move, thereby realizing the adjustment of the position of the diamond pen 17 described below.

[0093] The fixing head 16 is disposed at one end of the rack 15 outside the base 14 and is preferably connected by bolts.

[0094] The diamond pen 17 is disposed on the fixing head 16, preferably connected by bolts.

[0095] In the present invention, the indexing plate 12 is provided with a circular guide rail and a cylindrical shaft;

[0096] The bottom end of the rotating seat 13 is provided with a cylindrical groove that is slidably connected to the cylindrical shaft, and the bottom end of the rotating seat 13 is provided with a bolt that is slidably connected to the circular guide rail. A groove can be optionally provided on the guide rail, and the screw rod of the bolt slides in the groove. The circular track of the indexing plate 12 and the rotating seat 13 are connected by bolts, and the nut can be tightened to fix the angle of the rotating seat 13 to adjust the angle of the diamond pen 17.

[0097] In the present invention, a knob 18 is further included which is connected to one end of the central axis away from the rack 15. The knob 18 is preferably connected above the central axis by a screw.

[0098] The working principle of the grinding wheel dresser provided by the present invention is as follows:

[0099] The cylindrical groove of the rotating seat 13 is slidably matched with the cylindrical shaft of the indexing plate 12, so that the rotating seat 13 can drive the base 14, the upper cover, etc. to rotate, and then drive the diamond pen 17 to rotate on the indexing plate 12, and the degree of rotation can be determined by the scale on the indexing plate 12. When the rotating seat 13 rotates on the indexing plate 12, the bolt rotates in the circular guide rail of the indexing plate 12, and tightening the nut can fix the rotating seat 13 on the indexing plate 12, thereby fixing the angle of the diamond pen 17. By rotating the knob 18, the gear is driven to rotate, and then the rack 15 is driven to extend and retract, so that the diamond pen 17 can be easily adjusted.

[0100] The method of using the optical curve grinder provided by the present invention is as follows:

[0101] The optical curve grinder is operated in a dark room. The grinding wheel rotates and the optical curve grinder projects the shape of the grinding wheel on the screen. When the light source is tangent to the edge of the grinding wheel, the projected shape is the shape of the grinding wheel tip. After adjusting the position of the grinding wheel dresser with the three-axis linkage and rotating the rotating seat 13 on the indexing plate 12 to the required position, that is, adjusting the angle of the diamond pen 17, rotate the knob 18 to make the diamond pen 17 head contact the grinding wheel to start dressing the grinding wheel.

[0102] Compare the projected grinding wheel tip shape with the controlled drawing magnified on the screen of the optical curve grinder, and adjust the shape and size of the grinding wheel on the left and right sides. To ensure the accuracy of the grinding wheel, the grinding wheel needs to be roughly and finely trimmed several times, so that the shape and size of the grinding wheel tip projected on the screen of the optical curve grinder gradually approach the standard shape and size of the notch on the controlled drawing, and the notch size of the notch is measured and checked under a microscope on the sample with the notch, until the depth and angle of the notch meet the standard and the error is minimized as much as possible, the grinding wheel can be trimmed.

[0103] When repairing or replacing parts, it is only necessary to remove the pins or screws of the upper cover, knob 18, middle shaft, base 14, rotating seat 13, fixed head 16, diamond pen 17, etc. Gears and racks 15 are important parts of the transmission components. If they are worn and loose, they can be firmly and accurately meshed by adjusting the copper gasket to avoid shaking.

[0104] The grinding wheel dresser is preferably made of a high temperature resistant alloy, or other high temperature resistant metal materials. The grinding wheel dresser of the optical curve grinder can be used to process impact notches of various metal materials and different shapes.

[0105] The above are only preferred specific implementations of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and improved concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A fixture for preparing a notch of an impact specimen using an optical curve grinder, characterized in that: include: Base plate; A base, disposed on the bottom plate; A lower chuck, disposed on the lower portion of the base and the bottom plate, having a U-shaped notch; An upper chuck, one end of which extends into the base and can slide in the base, and the other end of which is located outside the base and has a U-shaped notched inclined surface; A spring compression head is located in the base, one end of which is connected to one end of the upper clamp; A push rod has one end extending into the base and the other end located outside the base, and is used to compress the other end of the spring compression head.

2. A fixture for preparing a notch of an impact specimen using an optical curve grinder according to claim 1, characterized in that: A first dovetail groove is provided on the vertical surface of the lower clamp, and a first insert strip is provided in the first dovetail groove; A second dovetail groove is provided on the inner side of the upper clamp and on a side opposite to the lower clamp, and a second insert strip is arranged in the second dovetail groove.

3. A fixture for preparing a notch of an impact specimen using an optical curve grinder according to claim 1, characterized in that: The push rod is threadedly connected to the base.

4. A fixture for preparing a notch of an impact specimen using an optical curve grinder according to claim 1, characterized in that: One end of the push rod is provided with a spherical contact point.

5. The fixture for preparing the notch of an impact specimen using an optical curve grinder according to claim 1, characterized in that: The other end of the push rod is provided with a mounting hole.

6. A fixture for preparing a notch of an impact specimen using an optical curve grinder according to any one of claims 1 to 5, characterized in that: The base and the top rod are sealed by a base right cover plate.

7. An optical curve grinder, characterized in that: The invention comprises a grinding wheel dresser and the fixture according to any one of claims 1 to 6.

8. An optical curve grinder according to claim 7, characterized in that: The grinding wheel dresser comprises: Indexing plate; A rotating seat, which is arranged on the indexing plate and can rotate on the indexing plate; A base is fixed on the rotating seat, a first through hole for the rack to pass through is opened on the side thereof, and a second through hole for the central axis to pass through is opened on the upper portion thereof; a gear, disposed on the central shaft and meshing with the rack; A fixed head, arranged at one end of the rack outside the base; The diamond pen is arranged on the fixed head.

9. An optical curve grinder according to claim 8, characterized in that: The indexing plate is provided with a circular guide rail and a cylindrical shaft; The bottom end of the rotating seat is provided with a cylindrical groove matched with the cylindrical shaft, and the bottom end of the rotating seat is provided with a groove slidably connected with the circular guide rail.

10. An optical curve grinder according to any one of claims 7 to 9, characterized in that: It also includes a knob connected to one end of the central shaft away from the rack.

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