阅读说明：本技术 一种大口径薄壁筒形件定位夹具 (Positioning fixture for large-diameter thin-wall cylindrical part ) 是由 杨荷娟 张明 魏丽英 于 2021-10-15 设计创作，主要内容包括：本发明公开了一种大口径薄壁筒形件定位夹具,该定位夹具包括软爪卡盘、支撑套、卡箍和螺栓；所述软爪卡盘的各个卡爪内侧定位型面的弧度与待加工薄壁筒形件的外壁弧度相匹配；所述支撑套为内径与待加工薄壁筒形件外径相匹配的柔性套；所述卡箍是由弹性金属材料加工而成的开口环形件,所述卡箍的两个开口端分别开有相对应的螺栓连接孔；待加工薄壁筒形件的端部通过所述软爪卡盘装夹固定,所述支撑套套接在待加工薄壁筒形件的中部侧壁,所述支撑套的两端侧壁分别套接有所述卡箍,每个卡箍的两个开口端通过螺栓紧固,使两个卡箍将所述支撑套箍固在待加工薄壁筒形件的中部侧壁。本发明的定位夹具实现了对大口径薄壁筒形件的可靠装夹定位。(The invention discloses a positioning fixture for a large-caliber thin-wall cylindrical part, which comprises a soft jaw chuck, a support sleeve, a clamp and a bolt; the radian of each claw inner side positioning molded surface of the soft claw chuck is matched with the radian of the outer wall of the thin-walled cylindrical part to be processed; the supporting sleeve is a flexible sleeve with the inner diameter matched with the outer diameter of the thin-wall cylindrical part to be processed; the clamp is an open ring-shaped piece processed by elastic metal materials, and two open ends of the clamp are respectively provided with corresponding bolt connecting holes; the end part of the thin-wall cylindrical part to be processed is clamped and fixed through the soft jaw chuck, the supporting sleeve is sleeved on the side wall of the middle part of the thin-wall cylindrical part to be processed, the side walls of the two ends of the supporting sleeve are respectively sleeved with the hoops, and the two open ends of each hoop are fastened through bolts, so that the two hoops fix the supporting hoop on the side wall of the middle part of the thin-wall cylindrical part to be processed. The positioning fixture realizes reliable clamping and positioning of the large-caliber thin-wall cylindrical part.)

1. A positioning fixture for a large-diameter thin-wall cylindrical part is characterized in that: the positioning clamp comprises a soft jaw chuck, a support sleeve, a hoop and a bolt;

the radian of each claw inner side positioning molded surface of the soft claw chuck is matched with the radian of the outer wall of the thin-walled cylindrical part to be processed;

the supporting sleeve is a flexible sleeve with the inner diameter matched with the outer diameter of the thin-wall cylindrical part to be processed;

the clamp is an open ring-shaped piece processed by elastic metal materials, and two open ends of the clamp are respectively provided with corresponding bolt connecting holes;

the end part of the thin-wall cylindrical part to be processed is clamped and fixed through the soft jaw chuck, the supporting sleeve is sleeved on the side wall of the middle part of the thin-wall cylindrical part to be processed, the side walls of the two ends of the supporting sleeve are respectively sleeved with the hoops, and the two open ends of each hoop are fastened through bolts, so that the two hoops fix the supporting hoop on the side wall of the middle part of the thin-wall cylindrical part to be processed.

2. The large-caliber thin-wall cylindrical part positioning fixture as claimed in claim 1, wherein: the supporting sleeve is made of rubber materials.

Technical Field

The invention relates to a positioning fixture for a large-diameter thin-wall cylindrical part, and belongs to the technical field of machining.

Background

The remote rocket has high precision requirement in the technical development, and in order to improve the combat performance, reduce the weight and increase the medicine loading, the product shell adopts a large-caliber thin-wall cylindrical part. The thin-wall cylindrical part is firstly processed into a thin-wall cylindrical semi-finished product by adopting a spinning process, and then the two ends of the thin-wall cylindrical semi-finished product are subjected to thread processing. When the traditional process is used for processing a semi-finished product of a thin-wall cylindrical part, the semi-finished product is processed after clamping and positioning on a lathe, and when the traditional process is used for clamping, positioning and positioning a large-caliber thin-wall cylindrical part, the clamped object has large size deformation, chatter marks on a processed surface, pits and indentations on the surface, and the process requirements cannot be met.

Disclosure of Invention

The invention aims to solve the problems that when a large-caliber thin-wall cylindrical part is clamped and positioned in the prior art, the size of a clamped object is greatly deformed, chatter marks are formed on a machined surface, and pits and indentations are formed on the surface of the machined surface, so that the process requirements cannot be met, and therefore, the positioning clamp for the large-caliber thin-wall cylindrical part is provided.

The purpose of the invention is realized by the following technical scheme:

the invention relates to a positioning fixture for a large-caliber thin-wall cylindrical part, which comprises a soft jaw chuck, a support sleeve, a clamp and a bolt;

the radian of each claw inner side positioning molded surface of the soft claw chuck is matched with the radian of the outer wall of the thin-walled cylindrical part to be processed;

the supporting sleeve is a flexible sleeve with the inner diameter matched with the outer diameter of the thin-wall cylindrical part to be processed;

the clamp is an open ring-shaped piece processed by elastic metal materials, and two open ends of the clamp are respectively provided with corresponding bolt connecting holes;

the end part of the thin-wall cylindrical part to be processed is clamped and fixed through the soft jaw chuck, the supporting sleeve is sleeved on the side wall of the middle part of the thin-wall cylindrical part to be processed, the side walls of the two ends of the supporting sleeve are respectively sleeved with the hoops, and the two open ends of each hoop are fastened through bolts, so that the two hoops fix the supporting hoop on the side wall of the middle part of the thin-wall cylindrical part to be processed.

The supporting sleeve is made of rubber materials.

Advantageous effects

According to the positioning clamp, the end part of the thin-wall cylindrical part to be processed is clamped through the soft jaw chuck, so that the clamping force is reduced, and the workpiece deformation is avoided; the suspended part of the thin-walled cylindrical part to be processed is clamped and sleeved by the supporting sleeve, so that chatter marks generated by resonance of the workpiece and the cutter bar are eliminated, surface defects such as indentation and scratch of the surface of the workpiece caused by the central frame are avoided, and the processed size meets the process requirements.

Drawings

FIG. 1 is a schematic structural view of a positioning fixture according to the present invention;

in the figure, 1-soft jaw chuck; 2-supporting the sleeve; 3, clamping a hoop; 4-a bolt; 5-thin-wall cylindrical piece to be processed.

Detailed Description

The invention is further described with reference to the following figures and examples:

examples

As shown in fig. 1, the positioning fixture for the large-caliber thin-wall cylindrical part comprises a soft jaw chuck 1, a support sleeve 2, a hoop 3 and a bolt 4;

the radian of each claw inner side positioning molded surface of the soft claw chuck 1 is matched with the radian of the outer wall of the thin-walled cylindrical part 5 to be processed;

the supporting sleeve 2 is a flexible sleeve with the inner diameter matched with the outer diameter of the thin-wall cylindrical part 5 to be processed;

the clamp 3 is an open ring-shaped piece processed by elastic metal materials, and two open ends of the clamp 3 are respectively provided with corresponding bolt 4 connecting holes;

the end part of the thin-walled cylindrical part 5 to be processed is clamped and fixed through the soft jaw chuck 1, the support sleeve 2 is sleeved on the middle side wall of the thin-walled cylindrical part 5 to be processed, the clamp 3 is sleeved on the side walls of the two ends of the support sleeve 2 respectively, and the two open ends of each clamp 3 are fastened through the bolts 4, so that the support sleeve 2 is fixedly hooped on the middle side wall of the thin-walled cylindrical part 5 to be processed by the two clamps 3.

The supporting sleeve 2 is made of rubber materials.