Precast rod clamping device

Abstract

The utility model relates to the technical field of optical fiber manufacturing, in particular to a preform rod clamping device which comprises a lifting part mounted on a platform, an arc plate fixed at the moving end of the lifting part, a through hole formed in the arc plate, a metal positioning ball arranged on the arc plate and tangent to the through hole, an insertion hole formed in the metal positioning ball and used for inserting a preform rod, and a clamping part arranged on the lifting part and used for clamping the preform rod. And a locking piece arranged on the outer side of the metal positioning ball is used for fixing. According to the preform rod clamping device, the bolt with the rubber head is arranged as a locking piece, so that clamping marks on the surface of a preform rod are avoided, the product quality is protected, the arc plate is lifted by utilizing the linear module, and a structure that a metal positioning ball is tangent to a through hole is matched, so that natural vertical falling is realized, and collimation and vertical motion tests of the preform rod are ensured; the refractive index performance of the preform is analyzed, vertical and accurate positioning of the preform is facilitated, test result deviation is reduced, and therefore the structure is relatively simple, operation is convenient, and production detection requirements are met.

Description

A precast bar clamping device Technical Field

[0001] This utility model relates to the field of optical fiber manufacturing technology, specifically a preform clamping device. Background Technology

[0002] In the production and testing processes of the optical fiber communication industry, the precise fixing of optical fiber preforms is a key prerequisite for ensuring the accuracy of subsequent processing and performance testing. Traditional optical fiber preform clamping methods mostly use rigid clamps to directly hold the preforms. This method not only easily creates clamp marks on the surface of the preforms, affecting product quality, but also makes it difficult to achieve precise vertical positioning of the preforms during the fixing process, leading to deviations in test results. In addition, some existing clamping devices have complex structures and are cumbersome to operate. They lack good versatility and adaptability when dealing with optical fiber preforms of different specifications, and cannot meet diverse production and testing needs. Summary of the Invention

[0003] To achieve the above objectives, the present invention provides the following technical solution: a precast bar clamping device, comprising a lifting part installed on a platform, an arc plate fixed to the moving end of the lifting part, a through hole provided on the arc plate, a metal positioning ball tangent to the through hole placed on the arc plate, an insertion hole provided on the metal positioning ball, the insertion hole being used to insert the precast bar, and being fixed by a locking member provided on the outside of the metal positioning ball.

[0004] Furthermore, the lifting unit is a linear module, and a moving plate is fixed to the moving end of the linear module, with the arc plate welded to the moving plate.

[0005] Furthermore, the locking component consists of three sets of bolts arranged in a triangle, threaded onto a metal positioning ball. The bolt heads are provided with rubber tips and extend into the insertion holes to be in contact with the precast rod.

[0006] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0007] This preform clamping device uses bolts with rubber heads as locking components to avoid clamping marks on the surface of the preform, thus protecting product quality. A linear module is used to raise and lower the arc plate, and the structure of the metal positioning ball tangent to the through hole ensures a natural vertical descent, guaranteeing the alignment of the preform. Vertical motion testing allows for analysis of the refractive index performance of the preform, facilitating precise vertical positioning and reducing test result deviations. Therefore, the structure is relatively simple, operation is convenient, and it meets production and testing needs. Attached Figure Description

[0008] Figure 1 is a schematic diagram of the structure of this utility model;

[0009] Figure 2 is a schematic diagram of the force analysis of the metal ball in this utility model.

[0010] In the diagram: 2. Linear module; 3. Moving plate; 4. Arc plate; 5. Through hole; 6. Metal positioning ball; 7. Bolt; 8. Precast rod. Detailed Implementation

[0011] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0012] Please refer to Figures 1-2. In this embodiment, a preform clamping device includes a linear module 2 mounted on a platform. A movable plate 3 is fixed to the movable end of the linear module 2. An arc plate 4 is welded onto the movable plate 3. Driven by the linear module 2, the movable plate 3 can drive the arc plate 4 to move slowly up and down. A through hole 5 is provided on the arc plate 4. A metal positioning ball 6 is placed on the arc plate 4. The metal positioning ball 6 is tangent to the through hole 5. An insertion hole is provided on the metal positioning ball 6. The preform 8 is inserted into the insertion hole. The preform 8 is solid. Three sets of bolts 7 arranged in a triangular pattern are provided on the outside of the metal positioning ball 6. The bolts 7 are threaded onto the metal positioning ball 6, and the head of the bolt 7 is provided with a rubber head. The rubber head extends into the insertion hole and is in contact with the preform 8.

[0013] In the above structure, the linear module enables precise vertical displacement control of the moving plate and the arc plate. Its slow lifting speed avoids significant swaying, stopping only after the preform has been lowered to a suitable height before testing. The curved surface design of the arc plate provides a stable support surface for the metal positioning ball, and the through-hole is tangent to the metal positioning ball, forming a geometric constraint positioning. The metal positioning ball, through its curved surface contact with the arc plate, can adapt to small angular deviations. Simultaneously, the symmetry of the sphere ensures that the central axis of the preform is coaxial with the through-hole. The tangent structure restricts the lateral movement of the sphere. Furthermore, the heavy weight of the preform, combined with the natural vertical descent of the metal positioning ball, ensures the alignment of the preform. Vertical movement testing analyzes the refractive index performance of the preform, allowing only minor adjustments along the through-hole axis in the vertical direction. The through-hole of the sphere provides a radial positioning reference for the preform, ensuring its axis is coaxial with the through-hole. Three sets of bolts are arranged in a triangle, forming a stable three-point clamping structure. Tightening the bolts allows the rubber head to press against the preform, achieving gapless fixing.

[0014] The rubber head design prevents the metal bolts from directly damaging the surface of the precast rod, while providing elastic clamping force.

[0015] The working principle of the above embodiment is as follows: First, the preform is inserted into the hole of the metal positioning ball. Then, by rotating three sets of bolts arranged in a triangle, the rubber head of the bolt head is brought into contact with the preform, thereby fixing the preform in the hole of the metal positioning ball. The rubber head can effectively prevent the bolt from damaging the surface of the preform. The structure of the metal positioning ball being tangent to the through hole allows the metal positioning ball to fall vertically naturally with the weight of the preform, ensuring the alignment of the preform. Vertical movement test is then conducted to analyze the refractive index performance of the preform.

[0016] The entire workflow is now complete, and anything not described in detail in this specification is existing technology known to those skilled in the art.

[0017] It should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0018] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A preformed bar clamping device, characterized in that: The device includes a lifting unit installed on the platform. The moving end of the lifting unit is fixed with an arc plate (4). A through hole (5) is provided on the arc plate (4). A metal positioning ball (6) tangent to the through hole (5) is placed on the arc plate (4). An insertion hole is provided on the metal positioning ball (6). The insertion hole is used to insert the precast rod (8) and is fixed by a locking member provided on the outside of the metal positioning ball (6).

2. The preform clamping device according to claim 1, characterized in that: The lifting part is a linear module (2), and a moving plate (3) is fixed to the moving end of the linear module (2). The arc plate (4) is welded to the moving plate (3).

3. The preform clamping device according to claim 1, characterized in that: The locking component consists of three sets of bolts (7) arranged in a triangle and threaded onto a metal positioning ball (6). The head of each bolt (7) is provided with a rubber head and extends into the insertion hole to be in contact with the precast rod (8).

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