CN204868271U - Lathe is with anchor clamps of long and thin annular thin wall spare of processing - Google Patents

Abstract

The utility model discloses a lathe is with anchor clamps of long and thin annular thin wall spare of processing, include the anchor clamps body, piece together the jack panel and tighten up the taper sleeve, the anchor clamps body be the step cylinder structure of forming by little cylindrical section and big cylindrical section, be equipped with the external screw thread on the excircle of big cylindrical section, be equipped with the location hole greatly on the cylindrical section, the hole of piecing together the jack panel divide into two sections, one section is the internal thread, another section be the interior conical surface, pieces together the internal thread of jack panel and the external screw thread of anchor clamps body and connects soon, tighten up the taper sleeve shape for conical, tighten up the tip contact of taper sleeve main aspects and big cylindrical section, the interior conical surface cover of piecing together the jack panel is on tightening up the male cone (strobilus masculinus) of taper sleeve. The utility model discloses not only the clamping is convenient, quick, and the location is accurate, through pressing from both sides specific protection, strengthens the rigidity of long and thin annular thin wall spare in addition, and the circumstances of avoiding cutter relieving or bullet to become takes place, guarantees the machining precision of part.

Description

A fixture for processing slender annular thin-walled parts for lathes

technical field

The utility model relates to a clamp for processing slender annular thin-walled parts for a lathe, which belongs to the technical field of turning tooling.

Background technique

The deformation of thin-walled parts during processing has basically become a consensus, and it has always been the focus of research in the machining industry, especially the processing of thin-walled parts with slender shafts is more difficult.

In the prior art, the processing of ring parts generally adopts 1) the positioning of the inner hole, and then tightening with bolts for turning. This method is poor in positioning and troublesome to install; After the turning is completed, the machining allowance is cut off, but this method not only wastes materials, but also easily produces burrs and deformation when the parts are cut. The above two methods are suitable for annular parts with small axial size and large inner diameter. For thin and long ring thin-walled parts, the rigidity is not good during processing, and it is easy to produce a tool gap, resulting in roughness and size that do not meet the design requirements. At present, there is no relatively mature process equipment to ensure the processing of such parts.

Utility model content

The purpose of the utility model is to provide a lathe fixture for processing slender annular thin-walled parts with simple structure, convenient use, high positioning accuracy and greatly improved processing efficiency, so as to overcome the shortcomings of the prior art.

The utility model relates to a fixture for processing slender annular thin-walled parts for a lathe, comprising a fixture body, a tightening nut and a tightening taper sleeve, and the fixture body is a stepped cylinder composed of a small cylindrical section and a large cylindrical section The outer circle of the large cylindrical section is provided with external threads, and the large cylindrical section is provided with a positioning inner hole; the inner hole of the clamping nut is divided into two sections, one section is an internal thread, and the other section is an internal cone surface , the internal thread of the tightening nut is screwed with the external thread of the fixture body; the shape of the tightening taper sleeve is conical, the large end of the tightening taper sleeve contacts the end of the large cylindrical section, and the inner tapered surface of the tightening nut Set on the outer tapered surface of the tightening taper sleeve.

Two sets of contraction grooves are provided on the tightening taper sleeve, and the contraction grooves are evenly distributed along the axial direction of the outer tapered surface.

The outer tapered surface of the tightening taper sleeve and the inner tapered surface of the splicing nut have the same taper, so as to ensure that the outer tapered surface of the tightening taper sleeve and the inner tapered surface of the splicing nut can closely fit.

The length of the outer cone surface is less than or equal to the length of the inner cone surface, so as to ensure that the outer cone surface can always fit on the inner cone surface.

Both the internal thread and the external thread are fine threads, which are convenient for fine-tuning and improve positioning accuracy.

Compared with the prior art, the utility model has the advantages that: when the utility model is turning the slender annular thin-walled parts, the outer circle of the part is turned out by the conventional processing method, and then the inner hole of the tapered sleeve is tightened to position, On the fixture body, the depth of the counterbore is adjusted according to the actual size of the part for clamping. Finally, the outer tapered surface of the tightening taper sleeve is matched with the inner tapered surface of the tightening nut, and the slender annular thin-walled part is axially tightened and fixed by rotating the thread. At this time, the fixture body can be clamped on the lathe to process the slender annular thin-walled parts. After the turning process is completed, the clamping nut can be loosened by rotation, and the workpiece can be easily taken out by removing the tightening taper sleeve. The utility model not only has convenient and fast clamping and accurate positioning, but also enhances the rigidity of the slender annular thin-walled parts through the protection of the clamping body, avoids the occurrence of knife or elastic deformation, and ensures the processing accuracy of the parts.

Description of drawings

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

Fig. 2 is the sectional view of the schematic structural view of the fixture body in the utility model;

Fig. 3 is the cross-sectional view of the structural representation of the tightening nut in the utility model;

Fig. 4 is the three-dimensional view of the structural representation of tightening taper sleeve in the utility model;

Fig. 5 is a cross-sectional view of the structure schematic diagram of the tightening taper sleeve in the utility model.

Explanation of reference signs: 1-fixture body, 2-tightening nut, 3-tightening taper sleeve, 4-slender annular thin-walled part, 5-internal thread, 6-inner cone surface, 7-small cylindrical section, 8 -Large cylindrical section, 9-external thread, 10-locating inner hole, 11-external cone, 12-shrink groove.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments.

Example of implementation of the present utility model: a structural schematic diagram of a fixture for processing slender annular thin-walled parts for a lathe, as shown in Figure 1, including a fixture body 1, a tightening nut 2 and a tightening taper sleeve 3, see Figure 2, the described The fixture body 1 is a stepped cylinder structure composed of a small cylindrical section 7 and a large cylindrical section 8. An external thread 9 is provided on the outer circle of the large cylindrical section 8, and a positioning inner hole 10 is provided on the large cylindrical section 8; see Fig. 3. The inner hole of the clamping nut 2 is divided into two sections, one section is an internal thread 5, and the other section is an internal cone surface 6, the internal thread 5 of the clamping nut 2 is screwed with the external thread 9 of the fixture body 1, Both the internal thread 5 and the external thread 9 are fine threads. Referring to Fig. 4 and Fig. 5, the shape of the tightening taper sleeve 3 is conical, the large end of the tightening taper sleeve 3 is in contact with the end of the large cylindrical section 8, and the inner tapered surface 6 of the tightening nut 2 is tightened. On the outer tapered surface 11 of the taper sleeve 3; the outer tapered surface 11 of the tightened taper sleeve 3 is the same as the inner tapered surface 6 of the tightening nut 2, and the length A of the outer tapered surface 11 is greater than or equal to the inner tapered surface 6 length B. The tightening taper sleeve 3 is provided with two sets of contraction grooves 12 , and the contraction grooves 12 are evenly distributed along the axial direction of the outer tapered surface 11 .

When installing, refer to Fig. 1, first use the lathe three-jaw chuck to clamp the small cylindrical section 7 on the fixture body 1, then put the elongated annular thin-walled part 4 into the positioning inner hole 10 on the fixture body 1, and then insert Insert the tightening taper sleeve 3, the inner cone surface 6 of the clamping nut 2 is set on the outer cone surface 11 of the tightening cone sleeve 3, the internal thread 5 of the clamping nut 2 is screwed with the external thread 9 of the clamp body 1, and Axial tightening, this moment just can carry out drilling or boring to slender annular thin-walled part 4. After the processing is completed, unscrew the splicing nut 2 and take off the tightening taper sleeve 3 to easily take out the slender annular thin-walled part 4 to complete the processing.

Claims (5)

1. A fixture for processing slender annular thin-walled parts for a lathe, including a fixture body (1), a tightening nut (2) and a tightening taper sleeve (3), characterized in that: the fixture body (1) It is a stepped cylinder structure composed of a small cylindrical section (7) and a large cylindrical section (8). An external thread (9) is provided on the outer circle of the large cylindrical section (8), and an external thread (9) is provided on the large cylindrical section (8). Locate the inner hole (10); the inner hole of the clamping nut (2) is divided into two sections, one section is the internal thread (5), the other section is the inner cone surface (6), and the inner hole of the clamping nut (2) The thread (5) is screwed with the external thread (9) of the fixture body (1); the shape of the tightening taper sleeve (3) is conical, and the large end of the tightening taper sleeve (3) is connected to the large cylindrical section (8) The end contact of the tightening nut (2) is sleeved on the outer cone surface (11) of the tightening taper sleeve (3). 2. The jig for lathe processing slender annular thin-walled parts according to claim 1, characterized in that: the tightening taper sleeve (3) is provided with two sets of shrinkage grooves (12), the shrinkage grooves (12 ) are uniformly distributed axially along the outer tapered surface (11). 3. The fixture for processing elongated annular thin-walled parts for lathes according to claim 2, characterized in that: the outer tapered surface (11) of the tightening taper sleeve (3) and the tightening nut (2) The taper of the inner cone surface (6) is the same. 4. The jig for processing elongated annular thin-walled parts for lathes according to claim 3, characterized in that: the length (B) of the outer tapered surface (11) is less than or equal to the length of the inner tapered surface (6) ( A). 5. The jig for machining elongated annular thin-walled parts for a lathe according to claim 1, characterized in that: said internal thread (5) and external thread (9) are both fine thread.