CN107186514A - Clamp for small-batch processing of three-way workpiece - Google Patents

Abstract

The invention discloses a fixture for small-batch processing of three-way workpieces, which includes a fixture body and a holding seat, the fixture body includes a first body and a second body coaxially arranged, and the first body is connected to the spindle of a lathe The inner hole is close to the axial direction, the first body and the second body are in the shape of a cylinder, the diameter of the second body is larger than the diameter of the first body, and the end of the second body is recessed inwardly to accommodate The space for the holding seat, the center of the bottom surface of the space for accommodating the holding seat is provided with a groove, and the screw for locking the holding seat is provided on the second body; the holding seat is in the shape of a cuboid, and the side of the holding seat faces inward The depression forms an installation area for accommodating three-way workpieces. The holder is provided with two sets of locking countersunk screw holes arranged in parallel. The locking countersunk screw holes are adapted to the screws, and the bottom of the holder is provided with The grooves match the bumps. The invention enables fast and accurate positioning of the clamping of the three-way workpiece.

Description

Fixtures for machining three-way workpieces in small batches

technical field

The invention relates to the technical field of part processing, in particular to a fixture for processing three-way workpieces in small batches.

Background technique

Processing three-way workpieces has always been a difficult problem in turning. The commonly used method is to align individually on the four-jaw chuck and process each end face. This method leads to the accuracy or shape tolerance of the processed workpiece depends on the operator of the equipment, and the processing quality cannot be guaranteed. In the case of large-scale production of three-way workpieces, the turning equipment will be modified to equip the equipment with hydraulic or pneumatic indexing chucks, so that after one end is processed, the indexing chuck can be directly indexed, and the conversion needs to process three-way The end face of the workpiece, this mass production method can guarantee the shape and position tolerance of the three-way workpiece. But when the three-way workpiece is processed in small batches, the workpiece needs to be corrected after the three end faces are converted, which affects the processing efficiency.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a fixture for small batch processing of three-way workpieces, so that the clamping of the three-way workpieces can be quickly and accurately positioned with the aid of the fixture.

The technical solution adopted by the present invention to solve the technical problem is: a clamp for small-batch processing of three-way workpieces, including a clamp body and a holder, the clamp body includes a first body and a second body coaxially arranged, The first body is axially close to the inner hole of the lathe spindle, the first body and the second body are cylindrical in shape, the diameter of the second body is larger than the diameter of the first body, and the second body The end of the end is recessed inwardly to provide a space for accommodating the holder, and the center of the bottom surface of the space for accommodating the holder is provided with a groove, and the second body is provided with a screw for locking the holder; the holder is a cuboid shape, the side of the holder is recessed inwardly to form a mounting area for accommodating the three-way workpiece, and the holder is provided with two sets of locking countersunk threaded holes arranged in parallel, and the locking countersunk threaded holes are compatible with the screws , the bottom of the holder is provided with a protrusion matching the groove.

Further, a locking screw hole is provided at the center of the end of the first body.

Further, the end of the first body includes a tapered portion.

Further, the locking threaded hole has a width of 20mm and a depth of 40mm.

Further, the groove is in the shape of a rectangle, and the protrusion is also in the shape of a rectangle.

Further, the centerline of the groove coincides with the centerlines of the first body and the second body.

The beneficial effects of the present invention are as follows:

1. The present invention expands the processing range of the CNC lathe, and at the same time, the precision far exceeds that of the general fixture;

2. The present invention ensures the circular runout and full runout of the fixture, which is beneficial to ensure the roundness of the processed three-way workpiece, and is more conducive to ensuring the shape and position tolerance of the three end faces of the three-way workpiece;

3. The present invention realizes that when changing the different end faces of the three-way workpiece, there is no need to disassemble the three-way workpiece, which is beneficial to ensure the shape and position tolerance between the three end faces, and effectively solves the problem that the workpiece needs to be corrected after the three end faces are converted.

Description of drawings

The present invention will be further described below in conjunction with drawings and embodiments.

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a schematic structural view of the clip body of the present invention;

Fig. 3 is the A-A view of clamp body of the present invention;

Fig. 4 is a schematic structural view of the holder of the present invention;

Fig. 5 is a top view of the holder of the present invention;

Fig. 6 is the structural representation of the second end surface of the three-way workpiece processed by the present invention;

Fig. 7 is a structural schematic view of the third end face of the three-way workpiece processed in the present invention.

In the figure, 1 clip body, 1.1, first body, 1.2, second body, 1.3, groove, 1.4, screw, 1.5, locking threaded hole, 2, holder, 2.1, locking countersunk threaded hole, 2.2 , Bump, 3, tee workpiece.

detailed description

In order to make the content of the present invention more clearly understood, the present invention will be further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

As shown in Figure 1 and Figure 5, a fixture for small batch processing of three-way workpieces includes a fixture body 1 and a holder 2, and the fixture body 1 includes a coaxial first body 1.1 and a second body 1.2, The first body 1.1 is axially close to the inner hole of the lathe spindle, the first body 1.1 and the second body 1.2 are cylindrical in shape, the diameter of the second body 1.2 is larger than the diameter of the first body 1.1, and the end of the second body 1.2 The part is recessed inward to provide a space for holding the holder 2, and the center of the bottom surface of the space for accommodating the holder 2 is provided with a groove 1.3, and the second body 1.2 is provided with a screw 1.4 for locking the holder 2; the holder 2 is in the shape of a cuboid The side of the holder 2 is recessed inwardly to form a mounting area for the three-way workpiece 3. The holder 2 is provided with two sets of locking countersunk threaded holes 2.1 arranged in parallel, and the locking countersunk threaded holes 2.1 are adapted to the screws 1.4. The bottom of the holder 2 is provided with a protrusion 2.2 matching the groove 1.3.

As shown in Figure 3, the end of the first body 1.1 also includes a tapered portion with a taper of 1:20, and the first body 1.1 is connected to the inner hole of the main shaft through a 1:20 taper with self-locking characteristics. Cooperate, so that the situation that the chuck body 1 and the inner hole of the main shaft will not slip during the whole processing process, and the normal progress of the processing is guaranteed. The center of the end of the first body 1.1 is provided with a locking threaded hole 1.5. If heavy-duty turning is performed, the locking thread can pass through the locking threaded hole 1.5 to firmly lock the clamp body 1 in the inner hole of the main shaft, and at the same time , The locking threaded hole 1.5 can also be used to disassemble the clamp body 1.

Fig. 1 is a structural schematic diagram of processing the first end face of the three-way workpiece. A three-way workpiece 3 is placed in the installation area of the holder 2, and the placement of the three-way workpiece 3 is guaranteed to be symmetrical with the holder 2. Locking the countersunk threaded hole 2.1 can lock the tee workpiece 3 in the holder 2 to ensure that no loosening occurs during turning. The protrusion 2.2 of the holder 2 is used for the positioning of the holder 2. The center line of the protrusion 2.2 is strictly coincident with the center line of the clamp body 1, which ensures the verticality between the three end faces of the three-way workpiece 3 and also ensures that The concentricity of the two end faces, the protrusion 2.2 and the groove 1.3 on the second body 1.2 ensure the interchangeability of the three end faces of the three-way workpiece 3, and the three-way workpiece 3 does not need to be disassembled and turned around in the processing engineering , Just loosen the countersunk thread and turn the holder 2, so that different processing end faces can be easily converted. Fig. 6 and Fig. 7 are the structural representations of processing the second end face and the third end face of the three-way workpiece 3 respectively;

Specifically, the locking threaded hole has a width of 20mm and a depth of 40mm.

Specifically, the cross sections of the groove 1.3 and the bump 2.2 are both rectangular.

The present invention realizes that when changing the different end faces of the three-way workpiece 3, it is not necessary to disassemble the three-way workpiece 3, and the three end faces of the three-way workpiece 3 rotate around the center, and the same numerical control program is used to ensure the shape of the three end faces. Position tolerance effectively solves the problem that the workpiece needs to be corrected after the conversion of the three end faces.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (6)

1. a kind of fixture that threeway workpiece is processed for small lot, it is characterised in that：Including clamp body and holding seat, the fixture Body includes the first noumenon and the second body being coaxially disposed, and the endoporus of the first noumenon and lathe spindle is axially abutted, described The first noumenon and the second body are cylindrical shape, and the diameter of second body is more than the diameter of the first noumenon, and described the The end of two bodies caves inward provided with the space for accommodating holding seat, and the receiving keeps the bottom center in the space of seat provided with recessed Groove, second body keeps the screw of seat provided with locking；The holding seat is rectangular shape, holding seat side to Sunken inside formation accommodates the installing zone of threeway workpiece, and the holding seat is provided with two groups of locking countersunk head screwed holes be arrangeding in parallel, The locking countersunk head screwed hole is adapted with screw, described to keep seat bottom provided with the projection with groove match.

2. the fixture according to claim 1 that threeway workpiece is processed for small lot, it is characterised in that：The first noumenon The center of end is provided with locking screw pit.

3. the fixture according to claim 2 that threeway workpiece is processed for small lot, it is characterised in that：The locking screw The width in hole is 20mm, and depth is 40mm.

4. the fixture according to claim 1 that threeway workpiece is processed for small lot, it is characterised in that：The first noumenon End include conical section.

5. the fixture according to claim 1 that threeway workpiece is processed for small lot, it is characterised in that：The groove is square Shape shape, the projection is also rectangular shape.

6. the fixture according to claim 1 that threeway workpiece is processed for small lot, it is characterised in that：In the groove Heart line is overlapped with the center line of the first noumenon, the second body.