Measuring device for faceted gem processing

Abstract

The utility model relates to the technical field of jewelry, in particular to a measuring device for facet type gem processing, which comprises an arc plate, scale marks and an arc positioning groove are arranged on the arc plate, one end of the arc plate is provided with a fixed arm extending towards the circle center direction of the arc plate, the extending end of the fixed arm is hinged with a movable arm, and the movable arm is provided with a rotating shaft. A pointer is arranged at the free end of the movable arm, and a locking piece which is in sliding fit with the arc positioning groove and used for locking the movable arm is arranged on the movable arm. The measuring device is convenient to measure the machining angle of the faceted gem, can improve the efficiency of grinding the gem, and improves the yield and quality of products.

Description

Technical Field

[0001] The utility model relates to the technical field of jewelry, in particular to a measuring device used for processing faceted gemstones. Background Art

[0002] The faceting processing angle refers to the angle between the cut facet and the girdle plane. In the processing of faceted gemstones, the processing angles of different facets of the same cut are different, and gemstones of different materials have different refractive indices. Even if the same set of facets of the same cut are processed, the processing angles will be different. Therefore, when processing faceted gemstones, it is necessary to change the processing angle. Accurately measuring the processing angle of faceted gemstones can enable the finished faceted gemstones to achieve the best optical effect and improve the processing quality.

[0003] Octagonal hand, hexagonal hand, and pentagonal hand are commonly used gem processing tools by gem processing technicians. For example, when using an octagonal hand to process faceted gems, the gem blank needs to be fixed on the metal sticking rod through gem glue, and then the metal sticking rod is installed and fixed in the handle of the octagonal hand. The octagonal hand is placed on the lifting platform of the gem grinder. By adjusting the height of the lifting platform, the angle between the stone blank and the grinding disc can be adjusted, thereby adjusting the processing angle. (such as Figure 1 as shown).

[0004] At present, there are three main methods for measuring the angle of octagonal hand-processed faceted gemstones. The first method is to use a protractor to measure the angle ∠B between the center of the sticking rod and the grinding disc. This angle is complementary to the faceting processing angle ∠A and needs to be converted, that is, ∠B=90°-∠A. Figure 2 The second method is to use a magnetic angle meter to fit the octagonal handle. The angle indicated by the pointer is the faceting processing angle ∠A, and no conversion is required. Figure 3 (right figure). The third method is to use the Pythagorean theorem to calculate (such as Figure 4 As shown in the figure), by measuring the dimension L from the octagonal template plane of the octagonal hand to the top of the stone blank, Figure 5 You can directly query the lifting plate height scale corresponding to the processing angle in the table.

[0005] However, all three methods of measuring facet processing angles have certain shortcomings. The first method of using a protractor to measure the angle is difficult to align with the center of the sticking rod, and measuring the angle with the naked eye will result in a large angle error. The second method of using a magnetic angle meter to measure the processing angle is that the pointer will shake during the measurement process, and the cylindrical handle makes it difficult for the starting edge of the angle meter to fully fit the cylindrical surface of the handle. There is a certain error in the angle measurement, and the cost is high, it is difficult to repair if damaged, and the accuracy of the angle meter is required to be high. The third table lookup method requires measuring the dimension L from the plane of the octagonal template to the top of the stone blank, and looking up the table to determine the height of the lifting plate, which is more cumbersome. Utility Model Content

[0006] The utility model aims to provide a measuring device for faceted gemstone processing, which is convenient for measuring the processing angle of the faceted gemstone, can improve the grinding efficiency, and improve the output and quality of the product.

[0007] The technical solution of the utility model is: a measuring device for faceted gem processing, comprising an arc plate, the arc plate is provided with scale marks and arc positioning grooves, one end of the arc plate is provided with a fixed arm extending toward the center of the arc plate, the extended end of the fixed arm is hinged with a movable arm, the free end of the movable arm is provided with a pointer, and the movable arm is provided with a locking piece that slidably cooperates with the arc positioning groove and is used to lock the movable arm.

[0008] Furthermore, the length of the arc plate is 1 / 4 of an arc, and the scale mark consists of scale lines of 0-90° and a number of scale numbers.

[0009] Furthermore, the locking member comprises a sliding block slidably matched with the arc positioning groove, and the movable arm is provided with a hand tightening screw threadedly connected with the sliding block.

[0010] Furthermore, the locking member comprises a hand-tightening screw passing through the movable arm, and the end of the hand-tightening screw passing through the circular arc positioning groove is threadedly connected with a locking nut.

[0011] Furthermore, the fixed arm is fixedly connected to the arc plate as a whole, and the side surfaces of the fixed arm and the movable arm for fitting with the lifting platform, octagonal plate, hexagonal plate or pentagonal plate are flat.

[0012] Furthermore, the indicating end of the pointer is a pointed end.

[0013] Furthermore, an arc-shaped avoidance groove is radially arranged on the arc plate along its length direction, the movable arm extends into the avoidance groove, and the indicating end of the pointer passes through the arc-shaped avoidance groove.

[0014] Furthermore, the locking piece is a hand screw, and the hand screw passes through the arc positioning groove and is threadedly connected to the movable arm.

[0015] Furthermore, the arc plate is a transparent plate.

[0016] Further, the fixed arm fits against the bottom surface of the octagonal plate of the octagonal hand, the center of the fixed arm is perpendicular to the handle of the octagonal hand and is rotatably connected, and a nut is screwed on the handle of the octagonal hand to lock the fixed arm and the octagonal plate; or the movable arm fits against the bottom surface of the octagonal plate of the octagonal hand, the center of the movable arm is perpendicular to the handle of the octagonal hand and is rotatably connected, and a nut is screwed on the handle of the octagonal hand to lock the movable arm and the octagonal plate.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] The measuring device is convenient for measuring and locking the processing angle of the faceted gemstone, and is easy and convenient to operate; it can improve the grinding efficiency and significantly improve the output and quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of an octagonal hand-processed faceted gemstone;

[0020] Figure 2 A schematic diagram of measuring angles with a protractor;

[0021] Figure 3 A schematic diagram of measuring angles with a magnetic inclinometer;

[0022] Figure 4 This is the conversion chart of faceted gemstone processing angle and lifting platform height;

[0023] Figure 5 This is the angle and height conversion table;

[0024] Figure 6 This is a structural schematic diagram of an angle measuring device according to Embodiment 1 of the present utility model;

[0025] Figure 7 A schematic diagram of the structure of the locking member and the arc plate of the utility model;

[0026] Figure 8 Another structural schematic diagram of the locking member and the arc plate of the utility model;

[0027] Fig. 9 This is a schematic diagram of the measurement principle of the octagonal hand-processed faceted gemstone of the utility model;

[0028] Fig.10 This is a schematic diagram of the embodiment 1 of the present utility model when measuring an angle of 43°;

[0029] Fig.11 This is a schematic diagram of the embodiment 1 of the present utility model when measuring an angle of 27°;

[0030] Fig.12 This is a schematic structural diagram of an angle measuring device according to Embodiment 2 of the present utility model;

[0031] Fig.13 This is a schematic structural diagram of an angle measuring device according to Embodiment 3 of the present utility model;

[0032] Fig.14 This is a schematic diagram of the angle measuring device and the octagonal hand in accordance with the third embodiment of the present utility model;

[0033] Fig.15 This is a schematic diagram of measuring a 60° angle in Embodiment 3 of the present utility model;

[0034] In the figure: 1-octagonal hand 2-octagonal plate 3-handle 4-nut 5-lifting platform 10-arc plate 11a-scale number 11b-scale line 12-arc positioning groove 13-fixed arm 14-arc avoidance groove 15-pin shaft 20-movable arm 21-pointer 30-locking piece 31-slider 32-tightening screw 33-tightening screw 34-locking nut 35-tightening screw. DETAILED DESCRIPTION

[0035] In order to make the above features and advantages of the present invention more understandable, embodiments are given below with reference to the accompanying drawings for detailed description, but the present invention is not limited thereto.

[0036] Example 1 Reference Figures 6 to 11

[0037] A measuring device for faceted gem processing includes an arc plate 10, on which a scale mark 11 and an arc positioning groove 12 are provided, and the arc positioning groove axially passes through the arc plate. A fixed arm 13 connected to one end of the arc plate is fixed, and one end of the fixed plate extends toward the center of the arc plate. A movable arm 20 is hinged to the extended end of the fixed arm through a pin 15, and a pointer 21 matching the scale mark is fixed to the free end of the movable arm. A locking member 30 that is slidably matched with the arc positioning groove and is used to lock the movable arm is provided on the movable arm. Therefore, after the pointer on the movable arm indicates the required angle scale, the movable arm is locked by the locking member.

[0038] In this embodiment, in order to better achieve the angle adjustment of the octagonal plate, the length of the arc plate is 1 / 4 of an arc, and the scale mark is composed of a scale line 11b of 0-90° and a number of scale numbers 11a.

[0039] In this embodiment, in order to lock the movable arm at a desired angle, the locking member includes a slider 31 that slidably cooperates with the arc positioning groove, and the movable arm is provided with a hand tightening screw 32 that is threadedly connected to the slider; or the locking member includes a hand tightening screw 33 that passes through the movable arm, and the end of the hand tightening screw that passes through the arc positioning groove is threadedly connected with a locking nut 34. Therefore, the movable arm is locked by rotating the hand tightening screw after the pointer points to the desired angle.

[0040] In this embodiment, the fixed arm is fixedly connected to the arc plate, and the side surfaces of the fixed arm and the movable arm for fitting with the lifting platform, octagonal plate, hexagonal plate or pentagonal plate are flat, so as to better fit with the upper surface of the lifting platform or the end surface of the octagonal plate.

[0041] In this embodiment, the indicating end of the pointer is a pointed end, so as to indicate the scale line and reduce the error.

[0042] Working principle: The processing angle is measured by measuring the angle between the octagonal plate and the lifting platform. This angle is the faceting processing angle. The specific calculation process is as follows: Fig. 9 As shown, it is known that the central axis of the stone coincides with the central axis of the octagonal hand, the octagonal plate of the octagonal hand is perpendicular to the central axis of the handle, and the waist edge of the stone is perpendicular to the central axis of the handle, so the octagonal plate of the octagonal hand is parallel to the waist edge of the stone; it is known that the lifting platform is parallel to the grinding wheel, so it can be deduced that the angle between the octagonal plate of the octagonal hand and the lifting platform is equal to the angle between the waist edge of the stone and the grinding wheel.

[0043] How to use: According to the processing angle, add a certain grinding angle margin to the angle measuring device in advance. For example, if you need to grind a gemstone with an angle of 60°, adjust the pointer of the movable arm to 61° or 62°, and lock the movable arm with the locking piece; fit the bottom surface of the fixed arm of the measuring device to the lifting platform of the gemstone processing equipment (or fit the side of the movable arm to the lifting platform); then fit one side of the octagonal plate that fixes the metal adhesive rod and the gemstone to the lifting platform, and fit the end face (bottom face) of the octagonal plate to the side of the movable arm (or fit the side of the fixed arm); finally, adjust the height of the lifting platform, and when the stone blank abuts against the grinding disc, lock the lifting platform. At this time, the angle between the octagonal plate and the lifting platform (the angle between the waist edge of the stone blank and the grinding disc) is the angle set on the measuring device. The measuring device can be removed from the lifting platform, and the measuring device can be adjusted to the required angle (for example, 60°), and then the stone blank can be polished. Measurement scenarios such as Fig.10 , Fig.11 Since the amount of polishing each time is not large, the measuring device can be adjusted to measure the processing angle for the second or third time during the polishing process to avoid over-polishing. When the movable arm and fixed arm of the measuring device fit the octagonal plate and the lifting platform, the angle on the gem is the required processing angle. The processed gem angle is allowed to have a deviation of ±0.5°.

[0044] When the other side of the gem needs to be processed, the octagonal plate is rotated so that the other side of the octagonal plate contacts the lifting platform and the stone blank contacts the grinding wheel. The other side can be polished directly and the angle can be measured during the polishing process by adjusting the measuring device of the processing angle.

[0045] Example 2 Reference Fig.12

[0046] The difference between this embodiment and the first embodiment is that an arc-shaped avoidance groove 14 is radially arranged on the arc plate along its length direction, the movable arm extends into the avoidance groove, and the indicating end of the pointer passes through the arc-shaped avoidance groove, so that the movable arm can move in the arc-shaped avoidance groove.

[0047] In this embodiment, the locking member is a hand screw 35, which passes through the arc positioning groove and is threadedly connected to the movable arm, so that the movable arm can be locked by rotating the hand screw after the pointer points to the required angle.

[0048] In this embodiment, in order to better observe the position of the pointer, the arc plate is a transparent plate.

[0049] The method and principle of using the device are the same as those in the first embodiment.

[0050] Example 3 Reference Figures 13 to 15

[0051] A measuring device for faceted gem processing includes an arc plate 10, on which a scale mark 11 and an arc positioning groove 12 are provided, and the arc positioning groove axially passes through the arc plate. A fixed arm 13 connected to one end of the arc plate is fixed, and one end of the fixed plate extends toward the center of the arc plate. A movable arm 20 is hinged at the extended end of the fixed arm, and a pointer 21 matched with the scale mark is fixed at the free end of the movable arm. A locking member 30 is provided on the movable arm, which is slidably matched with the arc positioning groove and is used to lock the movable arm. The fixed arm 13 fits with the bottom surface of the octagonal plate 2 of the octagonal hand 1, the center of the fixed arm is perpendicular to the handle 3 of the octagonal hand and is rotatably connected, and the handle of the octagonal hand is screwed with a nut 4 for locking the fixed arm and the octagonal plate; or the movable arm 20 fits with the bottom surface of the octagonal plate 2 of the octagonal hand 1, the center of the movable arm is perpendicular to the handle 3 of the octagonal hand and is rotatably connected, and the handle of the octagonal hand is screwed with a nut for locking the movable arm and the octagonal plate. That is, the movable arm or the fixed arm is provided with a mounting hole for the handle to pass through. The length of the octagonal plate is slightly larger than the length of the movable arm or the fixed arm, so that the side of the octagonal plate can fit with the lifting platform.

[0052] In this embodiment, in order to better achieve the angle adjustment of the octagonal plate, the length of the arc plate is 1 / 4 of an arc, and the scale mark consists of scale lines of 0-90° and several scale numbers.

[0053] In this embodiment, the locking member includes a slider 31 that slidably cooperates with the arc positioning groove, and the movable arm is provided with a hand tightening screw 32 that is threadedly connected to the slider; or the locking member includes a hand tightening screw 33 that passes through the movable arm, and the end of the hand tightening screw that passes through the arc positioning groove is threadedly connected with a locking nut 34. Therefore, the movable arm is locked by rotating the hand tightening screw after the pointer points to the desired angle.

[0054] In this embodiment, the fixed arm is fixedly connected to the arc plate, and the side surfaces of the fixed arm and the movable arm for fitting with the lifting platform, octagonal plate, hexagonal plate or pentagonal plate are flat, so as to better fit with the upper surface of the lifting platform or the end surface of the octagonal plate.

[0055] In this embodiment, the indicating end of the pointer is a pointed end, so as to indicate the scale line and reduce the error.

[0056] In another embodiment, the structure of the arc plate can also be radially provided with an arc-shaped avoidance groove 14 along its length direction, the movable arm extends into the avoidance groove, and the indicating end of the pointer passes through the arc-shaped avoidance groove, so that the movable arm moves in the arc-shaped avoidance groove. The locking member is a hand tightening screw 35, which passes through the arc positioning groove and is screwed to the movable arm, so that the movable arm is locked by rotating the hand tightening screw after the pointer points to the desired angle.

[0057] The working principle of the device is the same as that of the first embodiment.

[0058] Specific usage: Take the connection and fit of the fixed arm and the octagonal plate of the octagonal hand as an example. Fix the octagonal hand with the metal adhesive rod and the gem to the fixed arm through the nut, adjust the pointer connected to the movable arm to the corresponding angle according to the processing angle, and lock the movable arm through the locking piece; then fit the bottom surface of the movable arm of the measuring device to the lifting platform of the gem processing equipment, and fit one side of the octagonal plate to the lifting platform; finally, adjust the height of the lifting platform, and lock the lifting platform when the stone blank abuts the grinding disc. At this time, the height of the lifting platform is the initial processing height. Then, according to the required grinding amount, lower the height of the lifting platform and lock it (there is a scale on the lifting center rod of the lifting platform), and one side of the octagonal plate abuts against the lifting platform, and the octagonal hand can be ground together with the angle measuring device. When the movable arm is completely fitted with the lifting platform, it is ground to the required depth.

[0059] When it is necessary to change the surface, loosen the nut, rotate the octagonal plate, make the adjacent side of the octagonal plate fit with the lifting platform, and then lock the nut.

[0060] A plurality of pulleys or balls may also be installed on the bottom surface of the fixed arm or the movable arm used to fit with the lifting platform to reduce the friction of the device when it moves.

[0061] If the present invention discloses or involves components or structures that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connection using bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the fixed connection to each other can also be replaced by an integrated structure (for example, manufactured by one-piece molding using a casting process) (except where it is obviously impossible to use an one-piece molding process).

[0062] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in the above utility model include states or shapes that are approximate, similar or close thereto.

[0063] Any component provided by the utility model can be assembled from multiple separate components, or can be a separate component manufactured by an integrated forming process.

[0064] The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the present invention.

Claims

1. A measuring device for faceted gemstone processing, comprising an arc plate, characterized in that: The arc plate is provided with scale markings and arc positioning grooves, one end of the arc plate is provided with a fixed arm extending toward the center of the arc plate, the extended end of the fixed arm is hinged with a movable arm, the free end of the movable arm is provided with a pointer, and the movable arm is provided with a locking piece that slides with the arc positioning groove and is used to lock the movable arm.

2. The measuring device for faceted gemstone processing according to claim 1, characterized in that: The length of the arc plate is 1 / 4 of an arc, and the scale mark consists of scale lines of 0-90° and a number of scale numbers.

3. The measuring device for faceted gemstone processing according to claim 1 or 2, characterized in that: The locking member comprises a sliding block which is slidably matched with the arc positioning groove, and the movable arm is provided with a hand tightening screw which is threadedly connected with the sliding block.

4. The measuring device for faceted gemstone processing according to claim 1 or 2, characterized in that: The locking member comprises a hand-tightening screw passing through the movable arm, and the end of the hand-tightening screw passing through the circular arc positioning groove is threadedly connected with a locking nut.

5. The measuring device for faceted gemstone processing according to claim 1, characterized in that: The fixed arm is fixedly connected to the arc plate as a whole, and the side surfaces of the fixed arm and the movable arm used to fit with the lifting platform, the octagonal plate, the hexagonal plate or the pentagonal plate are flat.

6. The measuring device for faceted gemstone processing according to claim 1, 2 or 5, characterized in that: The indicating end of the pointer is a pointed end.

7. The measuring device for faceted gemstone processing according to claim 1, 2 or 5, characterized in that: The arc plate is radially provided with an arc-shaped avoidance groove along its length direction, the movable arm extends into the avoidance groove, and the indicating end of the pointer passes through the arc-shaped avoidance groove.

8. The measuring device for faceted gemstone processing according to claim 7, characterized in that: The locking piece is a hand tightening screw, and the hand tightening screw passes through the circular arc positioning groove and is screwed to the movable arm.

9. The measuring device for faceted gemstone processing according to claim 7, characterized in that: The arc plate is a transparent plate.

10. The measuring device for faceted gemstone processing according to claim 1, 2, 5, 8 or 9, characterized in that: The fixed arm fits against the bottom surface of the octagonal plate of the octagonal hand, the fixed arm is perpendicular to and rotatably connected to the handle of the octagonal hand, and a nut is screwed on the handle of the octagonal hand to lock the fixed arm and the octagonal plate; or the movable arm fits against the bottom surface of the octagonal plate of the octagonal hand, the movable arm is perpendicular to and rotatably connected to the handle of the octagonal hand, and a nut is screwed on the handle of the octagonal hand to lock the movable arm and the octagonal plate.

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