CN104647101A - Screw sleeve part inner hole processing lathe clamp - Google Patents

Abstract

The invention discloses a lathe fixture for processing the inner hole of a screw sleeve part, which includes a clamp body, a nut, a taper sleeve and a return spring. Barrel-shaped thin wall with 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 threaded sleeve to be processed; the taper sleeve whose inner taper matches the outer taper of the thin wall Set on the outer side of the thin wall; the return spring is set on the thin wall and between the threaded step and the taper sleeve at the rear of the clamp body; the nut passes through the thin wall and the taper sleeve and is threadedly connected with the clamp body. The invention 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 invention 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.

Contents of the invention

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

The purpose of the present invention 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 present invention, 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 present invention 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 invention 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 to ensure the reliability of the clamp to clamp the screw sleeve parts. The invention adopts the design of the return spring, which makes the disassembly of the screw sleeve parts more convenient and reduces the labor intensity of workers. In the present invention, a correction ring is provided 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 present invention has the following advantages: the present invention 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, ensuring the consistency of the inner hole of the screw sleeve part and the axis line of the outer circle , to meet 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 is in full surface contact with the outer circle of the screw sleeve part, the contact area is large, and the clamping force per unit area is small , When clamping the screw sleeve parts with thin 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 schematic structural view of the present invention.

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 invention 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. sex.

Claims (4)

1. a swivel nut inner bore of part lathe for machining fixture, it is characterized in that: this turning attachment comprises clamp body (2), nut (3), tapered sleeve (6) and back-moving spring (4), be arranged on lathe spindle with the clamp body (2) of seam location by transition disc, the front end of clamp body (2) is the thin-walled (7) of the tubbiness with external taper, and the rear end external diameter of thin-walled (7) is greater than front end external diameter; Internal diameter and the swivel nut external diameter to be processed of thin-walled (7) are suitable; Internal taper and the suitable tapered sleeve (6) of thin-walled (7) external taper are sleeved on thin-walled (7) outside; Back-moving spring (4) is sleeved on thin-walled (7) place and is positioned between the screw thread step at clamp body rear portion and tapered sleeve (6); Nut (3) is through thin-walled (7) and tapered sleeve (6) and be threaded connection with clamp body (2).

2. swivel nut inner bore of part lathe for machining fixture according to claim 1, is characterized in that: the corrector loop (1) being provided with adjustment clamp body (2) position in clamp body (2) rear end.

3. swivel nut inner bore of part lathe for machining fixture according to claim 1, is characterized in that: the internal taper of tapered sleeve (6) is identical with thin-walled (7) external taper.

4. swivel nut inner bore of part lathe for machining fixture according to claim 1, is characterized in that: on nut (3), be provided with nut rotation handle patchhole (5).