Hydraulic chuck claw repair device

Abstract

The utility model belongs to the technical field of machining auxiliary equipment, especially relates to a hydraulic chuck claw repairing device, including fixed plate, chuck body. The chuck body is cylindrically arranged and is provided with a fixing hole, and the fixing hole is provided with an internal thread. The outer side of the chuck body is provided with a fixing column, the fixing column is provided with three, and is evenly fixed to the chuck body; the center lines of the three fixing columns all pass through the center of the chuck body. The three fixing columns of the hydraulic chuck claw repairing device provided by the utility model embodiment are evenly distributed along the circumference of the chuck body, and the center lines all pass through the center of the chuck body, so that the concentricity when the soft claw clamps is ensured, the problem that the length from the soft claw contact surface to the center is inconsistent due to the reference offset in the prior art is avoided; the C-shaped arc clamping groove is matched with the soft claw outer arc, the contact area is increased, the clamping is more stable, the soft claw is prevented from shifting during the correction process, the correction accuracy is further ensured, the corrected soft claw can be accurately matched with the workpiece, and the machining error is reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of auxiliary equipment for mechanical processing, and in particular relates to a hydraulic chuck jaw repairer. Background Technology

[0002] In the field of machining, hydraulic chucks are commonly used workpiece clamping devices. Their matching soft jaws are widely used in mass production scenarios because they are adjustable and can adapt to workpieces of different sizes and shapes. However, when changing the products being processed, the clamping contact surface of the soft jaws needs to be modified to ensure the coaxiality and positioning accuracy of the workpiece clamping and to avoid machining errors.

[0003] There are currently two main types of soft gripper correction methods in the industry:

[0004] The conventional lathe-machined round bar correction method involves the operator first machining a round bar with dimensions similar to the workpiece on a conventional lathe. This bar is then clamped in a hydraulic chuck, and the soft jaws are corrected using the bar as a reference. The length from the contact surface of the soft jaws to the center of the chuck is then adjusted using a cutting tool. This method has significant drawbacks: machining the round bar requires additional time, and the matching degree between the bar's dimensions and the workpiece directly affects the correction accuracy; the bar is prone to misalignment during clamping, leading to inconsistent lengths from the contact surface to the center after correction, ultimately affecting workpiece clamping accuracy; and when changing to workpieces of different sizes, the corresponding round bar must be machined repeatedly, making the operation cumbersome and inefficient.

[0005] Disc-type clamp fixing method: This method uses a disc-shaped clamp to tighten the soft jaws before correction. The problems with this method are: the contact area between the clamp and the soft jaws is small, resulting in poor clamping stability; the soft jaws are prone to radial displacement during correction; the concentricity of the clamp is difficult to guarantee, leading to low correction accuracy of the soft jaws; and subsequent workpiece clamping is prone to eccentricity and wobbling, thus affecting machining quality; furthermore, the installation, disassembly, and adjustment of the clamps are time-consuming, failing to meet the demands of high-efficiency production. Utility Model Content

[0006] The purpose of this invention is to provide a hydraulic chuck jaw repair tool, which aims to solve the technical problems of low precision, cumbersome operation, and time-consuming and labor-intensive hydraulic chuck soft jaw repair in the prior art.

[0007] To achieve the above objectives, the hydraulic chuck jaw trimmer provided in this embodiment of the utility model includes a fixing plate and a chuck body, wherein the fixing plate is fixed to the bottom side of the chuck body;

[0008] The chuck body is cylindrical and has a fixing hole with an internal thread inside.

[0009] The chuck body is provided with three fixing posts on its outer side, which are evenly fixed to the chuck body; the center lines of the three fixing posts all pass through the center of the chuck body.

[0010] As an optional solution of this utility model, the fixing plate is provided with a plurality of mounting holes, which are evenly arranged on the fixing plate and are elliptical in shape.

[0011] As an optional solution of this utility model, one end of the fixing column is provided with an arc-shaped clamping groove, the middle of which is recessed inward and arranged in a C-shape.

[0012] The hydraulic chuck jaw trimmer provided in this embodiment of the utility model has at least one of the following technical effects:

[0013] 1. Significantly improved correction accuracy: The three fixed posts are evenly distributed along the circumference of the chuck body (with an angle of 120° between adjacent fixed posts), and the center lines of all posts pass through the center of the chuck body, ensuring concentricity of the soft jaws during clamping and avoiding the problem of inconsistent lengths from the contact surface of the soft jaws to the center caused by reference offset in the existing method; the C-shaped arc clamping groove matches the outer arc of the soft jaws, increasing the contact area and making the clamping more stable, preventing displacement of the soft jaws during correction, further ensuring correction accuracy, and enabling the corrected soft jaws to accurately fit the workpiece and reduce machining errors;

[0014] 2. Convenient operation, time-saving and labor-saving: No need for additional processing of round bars or cumbersome installation clamps, the claw trimmer can be quickly fixed to the hydraulic chuck directly through the elliptical mounting holes of the fixing plate. The positioning and fixing of the soft claw can be completed through the C-shaped clamping slots of the three fixing columns, which greatly shortens the preparation time for soft claw correction. The elliptical mounting holes allow for fine adjustment of position during installation, which facilitates quick calibration of the concentricity of the chuck body and the hydraulic chuck, simplifying the operation process.

[0015] 3. Strong adaptability and good versatility: The elliptical mounting holes of the fixed plate can be adapted to the mounting hole positions of different models of hydraulic chucks, and the C-shaped clamping slots of the three fixed columns can be compatible with various specifications of soft jaws (adaptable by adjusting the installation position of the soft jaws). There is no need to change the jaw repair tool for different workpieces or chucks, reducing equipment investment costs. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1A side view of the hydraulic chuck claw repairer provided in an embodiment of this utility model.

[0018] Figure 2 A perspective view of the hydraulic chuck claw repairer provided in an embodiment of this utility model.

[0019] Figure 3 A top view of the hydraulic chuck jaw trimmer provided in an embodiment of this utility model.

[0020] The following are the labeling elements in the figure:

[0021] 1. Fixing plate; 2. Chuck body;

[0022] 11. Mounting holes;

[0023] 21. Fixing hole; 22. Internal thread; 23. Fixing post; 24. Arc-shaped clamping groove. Detailed Implementation

[0024] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of this utility model, and should not be construed as limiting the utility model.

[0025] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0028] In one embodiment of this utility model, such as Figures 1-3 As shown, a hydraulic chuck clamping tool is provided, including a fixing plate 1 and a chuck body 2, with the fixing plate 1 fixed to the bottom side of the chuck body 2.

[0029] The chuck body 2 is cylindrical and has a fixing hole 21 with an internal thread 22 inside.

[0030] Three fixing posts 23 are provided on the outer side of the chuck body 2 and are evenly fixed to the chuck body 2. The center lines of the three fixing posts 23 all pass through the center of the chuck body 2. The three fixing posts 23 are arranged symmetrically at 120° around the circumference of the chuck body 2, and their center lines all pass through the center of the chuck body 2, forming an "equilateral triangle constraint structure" with the center of the chuck body 2 as the reference. After the hydraulic chuck jaws (movable hard jaws) are engaged with the C-shaped arc-shaped clamping grooves 24 of the fixing posts 23, the radial pressure applied by the jaws will be transmitted to the chuck body 2 through the fixing posts 23. Due to the three-point symmetry, the pressure at any point will be balanced by the reaction forces of the other two points, avoiding center offset and forming a three-point center force, thus improving accuracy.

[0031] In another embodiment of this utility model, the fixing plate 1 is provided with a plurality of mounting holes 11, which are evenly arranged on the fixing plate 1 and are elliptical in shape. The mounting holes 11 facilitate the fixing of the dust cover of the liquid chuck.

[0032] In another embodiment of the present invention, one end of the fixing post 23 is provided with an arc-shaped clamping groove 24, the middle of which is recessed inward and is C-shaped.

[0033] The hydraulic chuck jaw trimmer provided in this embodiment is used as follows:

[0034] 1. Claw trimmer installation: Place the assembled claw trimmer on the bottom side of the hydraulic chuck, aligning the center of the chuck body 2 with the center of the hydraulic chuck; pass the bolt through the elliptical mounting hole 11 of the fixing plate 1 and screw it into the mounting thread hole of the hydraulic chuck. Do not tighten it yet. Use a dial indicator to fine-tune the position of the claw trimmer to ensure that the concentricity error between the chuck body 2 and the hydraulic chuck is ≤0.01mm. Then tighten the bolt (tightening torque 30-40N・m) to complete the fixing of the claw trimmer.

[0035] 2. Soft jaw positioning and clamping: Install the soft jaw that needs to be corrected on the jaw seat of the hydraulic chuck, adjust the extension length of the soft jaw so that the outer circle of the soft jaw fits into the C-shaped clamping groove of the fixed column 23; drive the soft jaw radially through the drive device of the hydraulic chuck until the outer circle of the soft jaw fits tightly into the inner wall of the clamping groove, thereby achieving the positioning and clamping of the soft jaw (the clamping force is controlled at 5-8MPa to avoid excessive clamping force causing deformation of the soft jaw);

[0036] 3. Soft jaw correction: Start the machining tool (such as a lathe), adjust the tool position, and perform turning correction on the clamping contact surface of the soft jaw; during the turning process, the tool feed speed is controlled at 0.1-0.2mm / r, the cutting speed is 80-100m / min, and the soft jaw clamping surface is turned to the preset diameter according to the size requirements of the workpiece to be processed (diameter error ≤0.01mm).

[0037] 4. Disassembly and replacement: After the soft jaw is corrected, the soft jaw is released by the hydraulic chuck drive device, and the jaw repair tool is removed (simply unscrew the fixing bolts of the fixing plate 1). Then, the new workpiece can be clamped and processed. When changing to soft jaws of different specifications, there is no need to adjust the jaw repair tool. Only the installation position of the soft jaw needs to be adjusted so that it fits into the clamping groove of the fixing column 23.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hydraulic chuck jaw trimmer, characterized in that, Includes a fixing plate and a chuck body, wherein the fixing plate is fixed to the bottom side of the chuck body; The chuck body is cylindrical and has a fixing hole with an internal thread inside. The chuck body is provided with three fixing posts on its outer side, which are evenly fixed to the chuck body; the center lines of the three fixing posts all pass through the center of the chuck body.

2. The hydraulic chuck jaw trimmer according to claim 1, characterized in that, The fixing plate is provided with a plurality of mounting holes, which are evenly distributed on the fixing plate and are elliptical in shape.

3. A hydraulic chuck jaw trimmer according to claim 1, characterized in that, One end of the fixed column is provided with an arc-shaped clamping groove, the middle of which is recessed inward and arranged in a C-shape.

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