Lens mold measuring jig

Abstract

The utility model relates to a kind of lens moulding measuring fixture, it is characterized by: including the moulding base placed on table top, the moulding base center is penetrated and is provided with positioning rod, the positioning rod upper end is equipped with threaded portion and from moulding base upper end, the moulding bottom is equipped with the threaded hole of the threaded connection of the threaded portion of the positioning rod upper end;Moulding positioning block is connected in the moulding base upper end one side, the first V-shaped positioning slot of abutting against moulding side surface is equipped on the moulding positioning block.The utility model lens moulding measuring fixture positioning is accurate, structure is stable, and good durability, without frequent correction center when measuring, and repeatedly clamping positioning effect is good, save measurement time, improve detection accuracy.

Description

Technical Field

[0001] This utility model relates to the field of tooling and fixtures, and in particular to a lens mold core measuring fixture. Background Technology

[0002] The lens mold core needs to have its sagitta measured using an ultra-high precision 3D measuring instrument (UA3P). A cylindrical platform is placed on the measuring instrument's table, and then the lens mold core is placed on the cylindrical platform for measurement. The main problems during measurement are as follows: ① The mold core is placed randomly on the cylindrical platform during measurement, making it impossible to repeatedly position it in the same location, resulting in repeated centering adjustments for each measurement; ② Because the height of the cylindrical platform is insufficient, an additional base plate is added at the bottom, increasing the gap between the mold core and the platform surface, requiring multiple measurements; ③ Because the cylindrical platform is made of a relatively soft material, frequent use will cause the platform surface to become uneven, leading to abnormal measurement results. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a lens mold core measuring fixture that has good repeatability and positioning effect, saves measurement time, and improves detection accuracy.

[0004] This utility model is achieved by the following solution: a lens mold core measuring fixture, including a mold core base placed on a table, a positioning rod is provided through the center of the mold core base, the upper end of the positioning rod is provided with a threaded part and extends from the upper end of the mold core base, the bottom of the mold core is provided with a threaded hole that is threadedly connected to the threaded part of the upper end of the positioning rod; a mold core positioning block is connected to one side of the upper end of the mold core base, and the mold core positioning block is provided with a first V-shaped positioning groove that abuts against the side of the mold core.

[0005] Furthermore, the platform is provided with a limiting block located next to the mold core base. The limiting block has a V-shaped limiting groove on the side facing the mold core base. A V-shaped support block is provided in the V-shaped limiting groove. The outer sides of the V-shaped support block are attached to the two sides of the V-shaped limiting groove. A base positioning block is provided on the V-shaped support block. The base positioning block has a second V-shaped positioning groove that abuts against the side of the mold core base.

[0006] Furthermore, the base positioning block is connected to the upper side of the V-shaped support block by screws.

[0007] Furthermore, the positioning rod and the center hole of the mold base are in clearance fit, the lower end of the positioning rod is provided with a circular head, the bottom of the mold base is provided with a groove, and the circular head is welded and fixed to the top surface of the groove.

[0008] Furthermore, a support block is provided below the mold core positioning block, and a pair of threaded holes A are provided on the upper surface of the mold core base located below the support block. The support block is provided with screw holes A corresponding to the positions of the threaded holes A. The support block is connected to the upper end of the mold core base through a pair of screws A in the screw holes A. The upper end of the screw holes A is provided with countersunk holes.

[0009] Furthermore, the upper side of the support block is provided with a pair of threaded holes B, and the mold core positioning block is provided with screw holes B corresponding to the positions of the threaded holes B. The mold core positioning block is connected to the upper side of the support block through a pair of screws B in the screw holes B, and the upper end of the screw holes B is provided with countersunk holes.

[0010] Furthermore, the mold base is a rotating structure, made of metal, and has a height of 85mm; the positioning rod has a diameter of 4mm.

[0011] Compared with the prior art, the present invention has the following advantages: the lens mold core measuring fixture of the present invention has accurate positioning, stable structure and good durability. It does not require frequent center correction during measurement, has good repeated clamping and positioning effect, saves measurement time and improves detection accuracy.

[0012] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below through specific embodiments and related drawings. Attached Figure Description

[0013] Figure 1 This is a perspective view of an embodiment of the present utility model; Figure 2 This is a cross-sectional view of an embodiment of the present utility model; The numbers in the diagram are explained as follows: 100-tabletop, 200-mold base, 300-positioning rod, 310-circular head, 400-mold, 500-mold positioning block, 510-first V-shaped positioning groove, 600-limiting block, 610-V-shaped limiting groove, 700-V-shaped support block, 800-base positioning block, 810-second V-shaped positioning groove, 900-support block. Detailed Implementation

[0014] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0015] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0016] like Figures 1-2 As shown, a lens mold core measuring fixture includes a mold core base 200 placed on a table 100, which is the measuring table of an ultra-high precision three-dimensional measuring instrument (UA3P). A positioning rod 300 is centrally disposed on the mold core base 200. The upper end of the positioning rod has a threaded portion and extends from the upper end of the mold core base. The bottom of the mold core 400 has a threaded hole that is threadedly connected to the threaded portion at the upper end of the positioning rod. A mold core positioning block 500 is connected to one side of the upper end of the mold core base. The mold core positioning block has a first V-shaped positioning groove 510 that abuts against the side of the mold core. This fixture achieves precise center positioning of the mold core through the cooperation of the positioning rod and the threaded hole at the bottom of the mold core. Combined with the first V-shaped positioning groove on the mold core positioning block, the groove abuts against the side of the mold core, ensuring consistent placement each time. Frequent center correction is not required during measurement, saving time and labor costs. The repeated clamping and positioning effect is significantly improved. The height measurement of batch parts does not require finding the center of each piece, saving a lot of time.

[0017] In this embodiment, a limiting block 600 is provided on the platform 100, located beside the mold base 200. The limiting block has a V-shaped limiting groove 610 facing the mold base, and a V-shaped support block 700 is provided within the V-shaped limiting groove. The outer sides of the V-shaped support block are abutted against the two sides of the V-shaped limiting groove. A base positioning block 800 is provided on the V-shaped support block, and a second V-shaped positioning groove 810 abuts against the side of the mold base. The limiting block 600 is placed in the middle of the measuring platform against the side wall of the machine tool to fix its position. Then, the assembled V-shaped support block and base positioning block are pressed against the limiting block.

[0018] In this embodiment, the base positioning block 800 is connected to the upper side of the V-shaped support block 700 by screws.

[0019] In this embodiment, the positioning rod 300 and the center hole of the mold base are in clearance fit. The lower end of the positioning rod is provided with a circular head 310, and the bottom of the mold base is provided with a groove. The circular head is welded and fixed to the top surface of the groove.

[0020] In this embodiment, a support block 900 is provided below the mold core positioning block 500. The upper surface of the mold core base is provided with a pair of threaded holes A located below the support block. The support block is provided with screw holes A corresponding to the positions of the threaded holes A. The support block is connected to the upper end of the mold core base through a pair of screws A in the screw holes A. The upper end of the screw holes A is provided with countersunk holes, and the heads of the screws A are hidden in the countersunk holes.

[0021] In this embodiment, the upper side of the support block is provided with a pair of threaded holes B, and the mold core positioning block is provided with screw holes B corresponding to the positions of the threaded holes B. The mold core positioning block is connected to the upper side of the support block through a pair of screws B in the screw holes B. The upper end of the screw holes B is provided with a countersunk hole, and the head of the screw B is hidden in the countersunk hole.

[0022] In this embodiment, the mold base is a rotating structure made of metal, with a height of 85mm and a positioning rod diameter of 4mm. The sufficient height of the mold base eliminates the need for additional pads, reducing the gaps between the mold and the platform, improving detection accuracy, increasing the success rate of single measurements, and reducing the number of repeated measurements. The second V-shaped positioning grooves of the limiting block and the base positioning block work together to stabilize the sides of the mold base, reducing wobbling and making the measurement process more stable. The metal material of the mold base extends its service life and reduces measurement anomalies caused by deformation.

[0023] When used on the UA3P measuring instrument, this fixture reduces the centering time by 80% compared to traditional measurement methods, decreases the number of gaps and repeated measurements, and reduces batch measurement time by 50% compared to traditional methods. The reduced measurement repeatability error significantly improves the accuracy and efficiency of lens mold height measurement. It features precise positioning, stable structure, and high durability.

[0024] Unless otherwise stated, if any of the technical solutions disclosed in this utility model discloses a numerical range, then the disclosed numerical range is a preferred numerical range. Any person skilled in the art should understand that the preferred numerical range is merely one among many feasible numerical values ​​that has a more obvious or representative technical effect. Because there are many numerical values, it is impossible to list them all. Therefore, this utility model discloses only some numerical values ​​to illustrate the technical solutions of this utility model. Furthermore, the numerical values ​​listed above should not constitute a limitation on the scope of protection of this utility model.

[0025] If this utility model discloses or relates to mutually fixedly connected parts or structural components, then unless otherwise stated, a fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws), or a non-detachable fixed connection (e.g., riveting, welding). Of course, mutually fixed connections can also be replaced by an integral structure (e.g., manufactured by integral molding using a casting process) (except where it is obviously impossible to use an integral molding process).

[0026] In addition, unless otherwise stated, the terms used in any of the technical solutions disclosed in this utility model to indicate positional relationships or shapes include states or shapes that are similar to, close to, or approximate with those states or shapes.

[0027] Any component provided by this utility model can be assembled from multiple individual components, or it can be a single component manufactured by a one-piece molding process.

[0028] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A lens mold core measuring fixture, characterized in that: The device includes a mold core base placed on a table, a positioning rod that runs through the center of the mold core base, a threaded part at the upper end of the positioning rod that extends from the upper end of the mold core base, and a threaded hole at the bottom of the mold core that is threaded to the threaded part at the upper end of the positioning rod. A mold core positioning block is connected to one side of the upper end of the mold core base, and the mold core positioning block has a first V-shaped positioning groove that abuts against the side of the mold core.

2. The lens mold core measuring fixture according to claim 1, characterized in that: The platform is provided with a limiting block located next to the mold core base. The limiting block has a V-shaped limiting groove on the side facing the mold core base. A V-shaped support block is provided in the V-shaped limiting groove. The outer sides of the V-shaped support block are attached to the two sides of the V-shaped limiting groove. A base positioning block is provided on the V-shaped support block. A second V-shaped positioning groove is provided on the base positioning block, which abuts against the side of the mold core base.

3. The lens mold core measuring fixture according to claim 2, characterized in that: The base positioning block is connected to the upper side of the V-shaped support block by screws.

4. The lens mold core measuring fixture according to claim 1, characterized in that: The positioning rod and the center hole of the mold base are in clearance fit. The lower end of the positioning rod is provided with a circular head, and the bottom of the mold base is provided with a groove. The circular head is welded and fixed to the top surface of the groove.

5. The lens mold core measuring fixture according to claim 1, characterized in that: A support block is provided below the mold core positioning block. A pair of threaded holes A are provided on the upper surface of the mold core base below the support block. A screw hole A corresponding to the position of the threaded hole A is provided on the support block. The support block is connected to the upper end of the mold core base through a pair of screws A in the screw hole A. A countersunk hole is provided at the upper end of the screw hole A.

6. The lens mold core measuring fixture according to claim 5, characterized in that: The upper side of the support block is provided with a pair of threaded holes B, and the mold core positioning block is provided with screw holes B corresponding to the positions of the threaded holes B. The mold core positioning block is connected to the upper side of the support block through a pair of screws B in the screw holes B, and the upper end of the screw holes B is provided with countersunk holes.

7. The lens mold core measuring fixture according to claim 5, characterized in that: The mold base is a rotating structure, made of metal, and has a height of 85mm; the positioning rod has a diameter of 4mm.

Images