Hydraulic clamping device for thin-wall cylindrical part

Abstract

The utility model discloses a hydraulic clamping device for a thin-wall cylindrical part. The hydraulic clamping device comprises a supporting outer ring, a supporting inner ring and an adjusting screw. An annular oil cavity groove is machined in the outer wall of the supporting inner ring. Stepped holes which are evenly distributed in the circumference are formed in the front end face of the supporting outer ring, connecting threads are machined on the large-diameter hole walls of the outer sides of the stepped holes, and oil through holes are formed in the small-diameter hole walls of the inner sides of the stepped holes towards the inner wall of the supporting outer ring. The outer wall of the supporting inner ring is welded and fixed with the inner wall of the supporting outer ring, and the annular oil cavity groove of the supporting inner ring is hermetically communicated with the stepped hole of the supporting outer ring through the oil through hole; the annular oil cavity groove of the supporting inner ring and the stepped hole of the supporting outer ring are filled with hydraulic oil. And the adjusting screw is in threaded connection in the stepped hole of the supporting outer ring. According to the hydraulic clamping device, the whole circle of thin-wall parts can be evenly clamped, and deformation caused by local clamping is eliminated.

Description

Technical Field

[0001] The utility model relates to a hydraulic clamping device for thin-walled cylindrical parts, belonging to the technical field of cylindrical part processing. Background Art

[0002] Many parts in conventional missile and missile products are thin-walled, cylindrical components. A common clamping method for machining these parts is a three-jaw chuck with fan-shaped soft jaws. These clamping methods only contact a portion of the part, causing elastic deformation in the clamped area. During machining, releasing the three jaws causes the part to recover, causing deformation of the machined surface and resulting in dimensional deviations, which in turn affects product quality. Currently, this method does not meet the machining requirements for thin-walled parts. Utility Model Content

[0003] The purpose of the utility model is to eliminate the technical difficulty of deformation caused when clamping thin-walled parts, and to provide a hydraulic clamping device for thin-walled cylindrical parts.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] The utility model discloses a hydraulic clamping device for thin-walled cylindrical parts, comprising a supporting outer ring, a supporting inner ring and an adjusting screw;

[0006] The inner ring diameter of the supporting inner ring matches the outer diameter of the cylindrical part to be processed, and the outer wall of the supporting inner ring is processed with an annular oil cavity groove;

[0007] The inner ring diameter of the supporting outer ring matches the outer ring diameter of the supporting inner ring. The front end surface of the supporting outer ring is provided with stepped holes evenly distributed around the circumference. The larger diameter hole wall of the outer side of the stepped hole is processed with a connecting thread. The smaller diameter hole wall of the inner side of the stepped hole is provided with an oil hole toward the inner wall of the supporting outer ring.

[0008] The front section of the adjusting screw is a polished rod section whose diameter matches the smaller aperture inside the stepped hole of the supporting outer ring, and the rear section of the adjusting screw is a threaded section that matches the threaded hole outside the stepped hole of the supporting outer ring;

[0009] The outer wall of the supporting inner ring is welded and fixed to the inner wall of the supporting outer ring, and the annular oil cavity groove of the supporting inner ring is sealed and connected to the stepped hole of the supporting outer ring through the oil through hole; the annular oil cavity groove of the supporting inner ring and the stepped hole of the supporting outer ring are filled with hydraulic oil; the adjusting screw is threadedly connected in the stepped hole of the supporting outer ring, and the radial deformation of the annular oil cavity groove of the supporting inner ring is adjusted by controlling the depth of the adjusting screw screwed into the stepped hole of the supporting outer ring.

[0010] The side wall of the polished rod section of the adjusting screw is grooved and connected with a sealing ring.

[0011] Working process

[0012] Before clamping, first rotate the adjusting screw outward to allow the annular oil cavity groove of the support inner ring to elastically retract. At this time, the cylindrical part to be processed can be inserted into the inner wall of the support inner ring; then rotate the adjusting screw inward, and the adjusting screw squeezes the annular oil cavity groove of the support inner ring through hydraulic oil to deform radially inward, so that the cylindrical part to be processed is clamped and positioned on the inner wall of the support inner ring; finally, clamp the support outer ring with a three-jaw chuck to complete the processing of the cylindrical part to be processed.

[0013] Beneficial effects

[0014] This hydraulic clamping device increases the oil pressure within the device's oil chamber by rotating an adjustment screw, causing the annular oil chamber groove supporting the inner ring to expand evenly and symmetrically toward the axis, thereby reducing the inner diameter of the clamping ring as a whole and achieving a full-circle clamping effect. This enables uniform and full-circle clamping of thin-walled parts, eliminating deformation caused by localized clamping while improving the rigidity of the clamping area and ensuring product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural front view of the hydraulic clamping device of the utility model;

[0016] Figure 2 for Figure 1 AA section view;

[0017] In the figure, 1-support inner ring, 2-support outer ring, 3-adjusting screw, 4-hydraulic oil, 5-sealing ring. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Example

[0020] like Figure 1 、 2 As shown, the utility model is a hydraulic clamping device for thin-walled cylindrical parts, comprising a supporting outer ring 2, a supporting inner ring 1 and an adjusting screw 3;

[0021] The inner ring diameter of the support inner ring 1 matches the outer diameter of the cylindrical part to be processed, and the outer wall of the support inner ring 1 is processed with an annular oil cavity groove;

[0022] The inner ring diameter of the support outer ring 2 matches the outer ring diameter of the support inner ring 1. The front end surface of the support outer ring 2 is provided with stepped holes evenly distributed around the circumference. The larger diameter hole wall on the outside of the stepped holes is processed with connecting threads. The smaller diameter hole wall on the inside of the stepped holes is provided with oil holes toward the inner wall of the support outer ring 2.

[0023] The front section of the adjusting screw 3 is a polished rod section whose diameter matches the smaller aperture inside the stepped hole of the supporting outer ring 2, and the rear section of the adjusting screw 3 is a threaded section that matches the threaded hole outside the stepped hole of the supporting outer ring 2;

[0024] The outer wall of the support inner ring 1 is welded and fixed to the inner wall of the support outer ring 2, and the annular oil cavity groove of the support inner ring 1 is sealed and connected to the stepped hole of the support outer ring 2 through the oil through hole; the annular oil cavity groove of the support inner ring 1 and the stepped hole of the support outer ring 2 are filled with hydraulic oil 4; the adjusting screw 3 is threadedly connected in the stepped hole of the support outer ring 2, and the radial deformation of the annular oil cavity groove of the support inner ring 1 is adjusted by controlling the depth of the adjusting screw 3 screwed into the stepped hole of the support outer ring 2.

[0025] The side wall of the polished rod section of the adjusting screw 3 is grooved and connected with a sealing ring 5 .

[0026] Working process

[0027] Before clamping, first rotate the adjusting screw 3 outward to elastically retract the annular oil cavity groove of the support inner ring 1. At this time, the cylindrical part to be processed can be inserted into the inner wall of the support inner ring 1; then rotate the adjusting screw 3 inward, and the adjusting screw 3 squeezes the annular oil cavity groove of the support inner ring 1 through the hydraulic oil 4 to deform radially inward, so that the cylindrical part to be processed is clamped and positioned on the inner wall of the support inner ring 1; finally, clamp the support outer ring 2 by the three-jaw chuck to complete the processing of the cylindrical part to be processed.

Claims

1. A hydraulic clamping device for thin-walled cylindrical parts, characterized by: It includes a supporting outer ring, a supporting inner ring and an adjusting screw; The inner ring diameter of the supporting inner ring matches the outer diameter of the cylindrical part to be processed, and the outer wall of the supporting inner ring is processed with an annular oil cavity groove; The inner ring diameter of the supporting outer ring matches the outer ring diameter of the supporting inner ring. The front end surface of the supporting outer ring is provided with stepped holes evenly distributed around the circumference. The larger diameter hole wall of the outer side of the stepped hole is processed with a connecting thread. The smaller diameter hole wall of the inner side of the stepped hole is provided with an oil hole toward the inner wall of the supporting outer ring. The front section of the adjusting screw is a polished rod section whose diameter matches the smaller aperture inside the stepped hole of the supporting outer ring, and the rear section of the adjusting screw is a threaded section that matches the threaded hole outside the stepped hole of the supporting outer ring; The outer wall of the supporting inner ring is welded and fixed to the inner wall of the supporting outer ring, and the annular oil cavity groove of the supporting inner ring is sealed and connected to the stepped hole of the supporting outer ring through the oil through hole; the annular oil cavity groove of the supporting inner ring and the stepped hole of the supporting outer ring are filled with hydraulic oil; the adjusting screw is threadedly connected in the stepped hole of the supporting outer ring, and the radial deformation of the annular oil cavity groove of the supporting inner ring is adjusted by controlling the depth of the adjusting screw screwed into the stepped hole of the supporting outer ring.

2. A hydraulic clamping device for thin-walled cylindrical parts according to claim 1, characterized in that: The side wall of the polished rod section of the adjusting screw is grooved and connected with a sealing ring.

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