A fixture for machining thin-walled parts

Abstract

The application discloses a clamp for thin-wall part machining and relates to the field of clamps. The flat mouth tongs comprise a base, a fixed tongs body, a movable tongs body, a screw rod, a nut, a mouth protection plate and a fastening device. The thin-wall part adopts a front and back surface separate processing scheme: when the back surface is processed, the blank is directly locked and fixed on the adapter plate through four M6 screws, and all cutting processes of the back surface are completed; when the front surface is processed, the flat mouth tongs are first installed and fixed on the adapter plate through four M6 screws, then the blank is clamped on two side walls by the double tongs mouth of the flat mouth tongs, and after the clamping is stable, the front surface is processed, and the complete front and back surface processing of the thin-wall part is realized through twice clamping.

Description

Technical Field

[0001] This invention relates to the field of fixtures, and more particularly to a fixture for machining thin-walled parts. Background Technology

[0002] In the past, three-jaw or four-jaw chucks were commonly used to clamp these types of workpieces, with the jaws holding the workpiece in place only by a few curved points at their front ends. All the clamping pressure was concentrated at these few contact points, resulting in significant deformation of the workpiece under pressure. While milling the inner and outer diameters under clamping force resulted in roundness parameters that met requirements, once the chuck was released, the accumulated stress inside the workpiece gradually released, and the previously deformed areas slowly springed back. After the deformation completely stabilized, the overall contour of the workpiece became irregular, exhibiting irregular deformation, and the finished product's dimensions and shape were substandard.

[0003] Thin-walled parts are machined on both the front and back sides. For parts requiring double-sided machining, the fixture should support reliable repeatability. Double-sided machining fixtures should support quick clamping to reduce auxiliary time. Summary of the Invention

[0004] The purpose of this invention is to provide a fixture for machining thin-walled parts, so as to solve the problems that thin-walled parts are prone to deformation during machining, which affects the machining quality and accuracy.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a fixture for processing both sides, comprising a flat-jaw vise, an adapter plate, and a base;

[0006] Four M6 screws are used to lock and fix the adapter plate to the base.

[0007] Before the reverse cutting process, the workpiece blank is pressed and fixed to the adapter plate with four M6 screws. This clamping scheme realizes the back forming process of thin-walled parts.

[0008] During the front-side cutting process, the flat-jaw vise is first secured to the adapter plate with four M6 screws. The workpiece is then clamped on both sides of the workpiece by the two-way clamping body of the flat-jaw vise to complete the front-side cutting process.

[0009] The thin-walled parts machining fixture designed in this invention has multiple advantages: the tooling has small repeatability positioning error, and the workpiece does not need to be recalibrated after multiple disassembly and assembly; it can effectively improve the overall machining dimensional accuracy, reduce the part machining production cost, and at the same time greatly alleviate the deformation defects that are prone to occur in the cutting stage of thin-walled parts. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0011] Figure 1 This is a schematic diagram of the overall external structure provided in an embodiment of the present invention;

[0012] Figure 2 This is a top sectional view of the structure provided in an embodiment of the present invention;

[0013] Figure 3 This is a schematic diagram of the front sectional view structure provided in an embodiment of the present invention;

[0014] Figure 4 This is a schematic diagram of the left sectional view of an embodiment of the present invention.

[0015] 1. Fixed clamp body; 2. Screw; 3. Movable clamp body; 4. Clamping screw; 5. Square nut; 6. Grip plate; 7. Washer; 8. Sleeve; 9. Screw; 10. Screw; 11. Cotter pin; 12. Adapter plate; 13. Base. Detailed Implementation

[0016] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0017] The accompanying drawings of the embodiments disclosed in this invention only involve structures relevant to the embodiments disclosed in this invention. Other structures can be referred to with common designs. Unless otherwise specified, the same embodiment and different embodiments of this invention can be combined with each other.

[0018] Please see Figure 1 Before reverse processing, the adapter plate 12 is fastened to the base 13 with four M6 screws, and the blank is fastened to the adapter plate 12 with four M6 screws, which can realize the reverse processing of thin-walled parts.

[0019] Please see Figures 1 to 4Before front-side machining, use four M6 screws 10 to fix the flat-jaw vise to the adapter plate 12. By turning the handle, the screw 2 is rotated. The thread of the screw 2 drives the square nut 5, which is fixed by the clamping screw 4. Since the square nut is restricted within the movable jaw 3 and cannot rotate, it drives the movable jaw 3 to move linearly on the guide rail of the fixed jaw 1. The jaw plates 6 on the movable jaw 3 and the fixed jaw 1 are fixed by screws 9. Press the workpiece to be machined against the jaw plates 6 to clamp the workpiece until it can just not wobble. Then tighten it by wrist force for another half turn to a full turn to lock it in place. Do not use a sleeve. Washers 7 protect the screw, while cotter pins 11 ensure the safety and reliability of the entire transmission mechanism. Front-side machining of thin-walled parts can be achieved.

[0020] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fixture for machining thin-walled parts, characterized in that, It includes flat-jaw pliers, adapter plate 12, and base 13. The flat-jaw pliers include a fixed jaw 1, a movable jaw 3, a screw 2, a square nut 5, a jaw guard 6, and a fastening device, which includes a washer 7, a sleeve 8, and a cotter pin 11. The drive assembly includes screw 2 and square nut 5. The clamping assembly includes a fixed clamp body 1, a movable clamp body 3, and a guard plate 6.

2. The fixture for machining thin-walled parts according to claim 1, characterized in that, Before reverse processing, the adapter plate 12 is fastened to the base 13 with four M6 screws, and the blank is fastened to the adapter plate 12 with four M6 screws, which can realize the reverse processing of thin-walled parts.

3. A fixture for machining thin-walled parts according to claim 1, characterized in that, Before machining the front side, use four M6 screws 10 to fix the flat-nose pliers to the adapter plate 12. By turning the handle, the screw 2 is rotated. The thread of the screw 2 drives the square nut 5, which is fixed by the clamping screw 4. Since the square nut is restricted within the movable jaw 3 and cannot rotate, it drives the movable jaw 3 to move linearly on the guide rail of the fixed jaw 1. The movable clamp body 3 and the fixed clamp body 1 have protective plates 6, which are fixed by screws 9. The workpiece to be machined is pressed tightly against the protective plates 6, and the workpiece is clamped together until it just stops moving. Then, use wrist force to tighten it another half turn to a full turn to lock it in place. Do not use a sleeve. Washers 7 protect the screw, while cotter pins 11 ensure the safety and reliability of the entire transmission mechanism. This allows for front-side machining of thin-walled parts.

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