CN204450017U - Swivel nut inner bore of part lathe for machining fixture - Google Patents

Abstract

The utility model discloses a lathe fixture for machining the inner hole of a screw sleeve part, which comprises a clamp body, a nut, a taper sleeve and a return spring. Barrel-shaped thin wall with external taper, and the outer diameter of the rear end of the thin wall is larger than the outer diameter of the front end; the inner diameter of the thin wall matches the outer diameter of the screw sleeve to be processed; the inner taper matches the outer taper of the thin wall The sleeve is set on the outside of the thin wall; the return spring is set on the thin wall and is located between the threaded step at the rear of the clamp body and the taper sleeve; the nut passes through the thin wall and the taper sleeve and is connected with the clamp body through threads. The utility model has the advantages of compact structure, simple, convenient and reliable operation, high positioning accuracy, easy guarantee of processing quality and strong practicability.

Description

Lathe fixture for inner hole processing of screw sleeve parts

technical field

The utility model relates to a lathe fixture, in particular to a lathe fixture for turning inner holes at both ends of a screw sleeve part.

Background technique

When processing the inner holes at both ends of the screw sleeve parts, a three-jaw chuck is usually used to position and clamp the workpiece through the outer circle of the workpiece. The three-jaw chuck has the advantages of strong versatility, no need for special manufacturing, and high centering accuracy. However, when the three-jaw chuck is used to clamp the workpiece, because of its small contact area with the workpiece, the The clamping force is large, especially when the wall thickness of the workpiece is thin, the workpiece is more likely to be clamped and deformed, which makes it difficult to guarantee the processing quality of the workpiece.

Utility model content

In order to overcome the problems existing in the prior art, the purpose of this utility model is to provide a lathe fixture for processing the inner hole of the screw sleeve part. The sleeve is used as a clamping mechanism, the fixture has a compact structure, simple and convenient operation, high positioning accuracy, easy to guarantee processing quality, and strong practicability.

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

A lathe fixture for processing the inner hole of a threaded sleeve part, characterized in that the lathe fixture includes a clamp body, a nut, a taper sleeve and a return spring, and the clamp body positioned with a notch is installed on the main shaft of the lathe through a transition plate, and the front end of the clamp body It is a barrel-shaped thin wall with an outer taper, and the outer diameter of the rear end of the thin wall is larger than the outer diameter of the front end; the inner diameter of the thin wall matches the outer diameter of the screw sleeve to be processed; the inner taper matches the outer taper of the thin wall The taper sleeve is set on the outside of the thin wall; the return spring is set on the thin wall and is located between the threaded step at the rear of the clamp body and the taper sleeve; the nut passes through the thin wall and the taper sleeve and is threadedly connected with the clamp body.

In the utility model, a correction ring for adjusting the position of the clamp body is provided at the rear end of the clamp body. The inner taper of the tapered sleeve is the same as the thin-walled outer taper. The nut is provided with a nut turning handle insertion hole.

The working principle of the utility model is: firstly, according to the diameter size of the positioning reference (outer circle) of the screw sleeve part to be processed, the thin-walled inner hole, the thin-walled outer taper (1°) and the thin-walled extension length of the front end of the clamp body are processed. . According to the thin-walled outer taper, process the inner taper of the taper sleeve (the inner taper of the taper sleeve = the thin-walled outer taper). Then the pre-positioning is completed in the thin-walled inner hole at the front end of the clamp body with the outer circle of the screw sleeve part. Insert the nut turning handle (not shown in the figure) on the nut, tighten the nut, and make the taper sleeve move to the left, force the thin wall at the front end of the clamp body to deform evenly, and clamp the screw sleeve parts centrally. After finishing the processing of the inner hole at one end of the screw sleeve part, loosen the nut slightly, the return spring at the left end of the taper sleeve springs up, forcing the taper sleeve to move to the right, so that the screw sleeve part is loosened, take out the screw sleeve part, turn around and complete it again according to the above method Positioning and clamping, and machining of the inner hole at the other end of the screw insert. Finally, take out the processed screw sleeve parts according to the aforementioned method.

The utility model adopts the design of the thin-walled outer taper at the front end of the clamp body and the inner taper of the taper sleeve, which ensures the reliability of the clamp to clamp the screw sleeve parts. The utility model adopts the design of the return spring, which makes the disassembly of the screw sleeve parts more convenient and reduces the labor intensity of the workers. The utility model is provided with a correction ring on the clamp body, and the clamp body can be adjusted through the correction ring to ensure that the axis of the screw sleeve part is consistent with the axis of the machine tool spindle, so as to meet the coaxial accuracy requirements and ensure the processing quality of the parts.

Compared with the prior art, the utility model has the following advantages: the utility model adopts the thin-walled design of the front end of the clamp body so that the positioning and clamping of the workpiece can be carried out at the same time, and the inner hole of the screw sleeve part and the axis line of the outer circle can be guaranteed. Consistency, meeting the coaxiality requirements between the outer circle of the screw sleeve part and the inner hole; at the same time, the thin wall at the front end of the clamp body and the outer circle of the screw sleeve part are in full surface contact, the contact area is large, and the clamping force per unit area Smaller, when clamping screw sleeve parts with thinner wall thickness, the clamping deformation of the screw sleeve parts is small, and the processing quality of the parts is easy to guarantee.

Description of drawings

Fig. 1 is a structural representation of the utility model.

Among the figure, 1-correction ring, 2-clamp body, 3-nut, 4-return spring, 5-nut rotating handle insertion hole, 6-taper sleeve, 7-thin wall, 8-screw sleeve parts.

Detailed ways

A lathe fixture for machining the inner hole of a threaded sleeve part, as shown in Figure 1, the lathe fixture includes a clamp body 2, a return spring 4, a tapered sleeve 6, a nut 3 and a nut turning handle (not shown in the figure). The clamp body 2 positioned by the spigot is installed on the lathe spindle through the transition plate; the return spring 4 is set on the front thin wall of the clamp body 2 and is located between the threaded step of the clamp body 2 and the taper sleeve 6; the taper sleeve 6 is set on the clamp body Concretely at the thin-walled front end of the clamp body 2; the nut 3 passes through the thin-walled front end of the clamp body 2 and the taper sleeve 6, and is threadedly connected with the clamp body 2; the nut turning handle (not shown) is connected with the nut 3 by a clearance fit.

During processing, after the outer circle of the screw sleeve part 8 is pre-positioned in the thin-walled inner hole at the front end of the clamp body 2, the positioning and clamping are completed by tightening the nut 3; Adjust the position of the clamp body 2 to ensure that the axis of the hole to be processed on the screw sleeve part is consistent with the axis of the machine tool spindle, so as to meet the coaxiality accuracy requirements of the hole and ensure the processing quality of the part. After finishing the processing of the inner hole at one end of the screw sleeve part, loosen the nut slightly, the return spring at the left end of the taper sleeve springs up, forcing the taper sleeve to move to the right, so that the screw sleeve part is loosened, take out the screw sleeve part, turn around and complete it again according to the above method Positioning and clamping, and machining of the inner hole at the other end of the screw insert. Finally, take out the processed screw sleeve parts according to the aforementioned method.

The utility model adopts a section of thin wall at the front end of the clamp body as the positioning element and the clamping element, and adopts the taper sleeve as the clamping mechanism. The fixture has compact structure, simple, convenient and reliable operation, high positioning accuracy, easy guarantee of processing quality, and strong practicality.

Claims (4)

1. A lathe fixture for processing the inner hole of a screw sleeve part, characterized in that: the lathe fixture includes a clamp body (2), a nut (3), a taper sleeve (6) and a return spring (4), and the clamp is positioned by a stop Specifically (2) is installed on the lathe spindle through a transition plate, the front end of the clamp body (2) is a barrel-shaped thin wall (7) with an outer taper, and the outer diameter of the rear end of the thin wall (7) is larger than the outer diameter of the front end ; The inner diameter of the thin wall (7) is compatible with the outer diameter of the screw sleeve to be processed; the tapered sleeve (6) whose inner taper is matched with the outer taper of the thin wall (7) is set on the outer side of the thin wall (7); the return spring ( 4) Set on the thin wall (7) and between the threaded step at the rear of the clamp body and the taper sleeve (6); the nut (3) passes through the thin wall (7) and the taper sleeve (6) and connects with the clamp body ( 2) Connected by thread. 2. The lathe clamp for processing the inner hole of the screw sleeve part according to claim 1, characterized in that: a correction ring (1) for adjusting the position of the clamp body (2) is provided at the rear end of the clamp body (2). 3. The lathe fixture for processing the inner hole of the threaded sleeve part according to claim 1, characterized in that: the inner taper of the taper sleeve (6) is the same as the outer taper of the thin wall (7). 4. The lathe jig for processing the inner hole of the threaded sleeve part according to claim 1, characterized in that: the nut (3) is provided with a nut turning handle insertion hole (5).