CN221047336U - Positioning fixture for end face pressing lathe - Google Patents

Abstract

The utility model discloses a positioning fixture of a press end surface lathe, which comprises: the clamping device comprises a chuck, a pressing mechanism, a fixing seat, a first fixing block and a second fixing block, wherein the pressing mechanism is arranged on the chuck, the fixing seat is concentrically and fixedly connected with the chuck, and the first fixing block and the second fixing block are fixedly connected with the fixing seat. The utility model provides a positioning clamp for a press end surface lathe, which can press a workpiece and prevent the workpiece from deforming when turning a special-shaped circular ring thin-wall part by axially pressing the end surface of the workpiece, is easier to position, and does not affect product positioning and clamping when the axial heights of the special-shaped circular ring thin-wall parts are different.

Description

Positioning fixture for end face pressing lathe

Technical Field

The utility model belongs to the technical field of tools, and particularly relates to a positioning clamp of a press end surface lathe.

Background

When turning the special-shaped annular thin-wall part in the machining process, an axle center positioning method is generally used for clamping the outer diameter or the inner diameter, and then turning is carried out. However, because the side wall of the special-shaped circular ring thin-wall part is relatively thin, the radial clamping force is too small to clamp the part, the part with too large radial clamping force is easy to deform, and the machining is relatively difficult.

In the prior art, chinese patent publication CN214559171U discloses a lathe fixture for machining elastic thin-walled parts, which presses the top of the workpiece by pressing plate. However, the axial clamping mode of the pressing plate for pressing the workpiece is not easy to position, and alignment before machining is difficult. Meanwhile, the special-shaped circular ring thin-wall parts are not easy to position when clamped at different heights in the axial direction.

Disclosure of utility model

The utility model aims to provide a positioning clamp for a press end surface lathe, which solves the problems that a special-shaped circular ring thin-wall part is easy to deform during processing and difficult to position during clamping with different heights in the axial direction, and alignment is difficult before processing.

For this purpose, the utility model provides a positioning fixture for a press end lathe, comprising: the clamping device comprises a chuck, a pressing mechanism, a fixing seat, a first fixing block and a second fixing block, wherein the pressing mechanism is arranged on the chuck, the fixing seat is fixedly connected with the chuck in a concentric manner, and the first fixing block and the second fixing block are arranged on the fixing seat.

Further preferably, the fixing seat is fixedly connected with the chuck through bolts, and the first fixing block and the second fixing block are fixedly connected with the fixing seat through bolts.

Preferably, the number of the pressing mechanisms is three, and the pressing mechanisms are uniformly distributed by taking the axis of the chuck as the center. The pressing mechanism is used for providing axial pressing force to press the workpiece, and the three pressing mechanisms can provide uniform pressing force at three points of the workpiece, so that the workpiece is stable.

Preferably, the pressing mechanism comprises a connecting seat, a pressing rod and a pressing block, wherein the connecting seat is arranged on the chuck, the pressing rod is arranged in the connecting seat, and the pressing block is arranged at one end of the pressing rod.

Preferably, the pressing block is rotationally connected on the pressing rod, and the pressing rod is connected with the connecting seat through threads. The rotary pressing rod can enable the pressing rod to move along the threaded hole in the connecting seat, so that the pressing block is driven to press the workpiece.

Preferably, the center of the chuck is provided with a groove which is connected with the fixing seat in a matching way. The groove is used for being matched with the fixing seat to enable the fixing seat to be stable.

Preferably, the first fixing block is provided with a V-shaped surface.

Further preferably, the included angle of the V-shaped surface is 90 °.

Preferably, the second fixing block is provided with a limiting surface.

Preferably, the V-shaped surface and the limiting surface are tangential to a circle having the same midpoint on the chuck axis. The V-shaped surface and the limiting surface are used for positioning the workpiece.

Preferably, the fixing seat is provided with a fixing groove, the first fixing block is provided with a clamping block, and the fixing groove is in matched sliding connection with the clamping block. The stability of the first fixed block can be increased through the cooperation of the fixed groove and the clamping block.

Preferably, the first fixing block is provided with a positioning block. The positioning block is used for positioning the workpiece and preventing the workpiece from rotating axially.

The beneficial effects are that:

1. The utility model provides a positioning clamp for a press end surface lathe, which can press a workpiece and prevent the workpiece from deforming when turning a special-shaped circular ring thin-wall workpiece in a mode of axially pressing the end surface of the workpiece, and can be clamped on a groove of the part according to different axial heights, so that the positioning is easier, and the alignment time before machining is reduced.

2. In the prior art, a workpiece is pressed by a pressing plate, but the axial pressing mode is not easy to position, and the alignment time before processing is long. According to the utility model, the first fixing block and the second fixing block are arranged on the fixing seat, the V-shaped surface is arranged on the first fixing block, the limiting surface is arranged on the second fixing block, the V-shaped surface and the limiting surface limit the special-shaped circular ring thin-wall part together, the workpiece cannot receive larger clamping force in the radial direction, and the deformation of the workpiece caused by clamping is reduced. Meanwhile, the V-shaped surface and the limiting surface are tangent to a circle with the same midpoint on the center line of the chuck, so that the center axis of the special-shaped circular ring thin-wall part is limited on the center line of the chuck, and when the chuck rotates, the workpiece also rotates around the center axis of the workpiece, alignment is easier, and the clamping time is shortened.

3. The first fixing block is provided with a clamping block for positioning the special-shaped annular thin-wall part, so that the rotation of the special-shaped annular thin-wall part in the axial direction is limited, and the stability of clamping is improved. Meanwhile, the clamping blocks enable the clamping and dismounting states of the workpiece to be consistent each time, and errors caused by repeated clamping for many times are reduced.

4. The pressing mechanism is used for providing axial pressing force to press the special-shaped annular thin-wall parts, so that the radial pressing force applied to the workpiece is reduced, and the clamping deformation of the workpiece is reduced. The three pressing mechanisms can provide uniform pressing force at three points of the workpiece, so that the workpiece is clamped firmly.

5. The fixture block on the first fixed block is connected with the fixed slot on the fixed seat, so that the first fixed block is connected more firmly, and the high-speed rotation can not loosen in the processing process.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 shows a special-shaped annular thin-walled part with a required turning inner diameter.

Fig. 2 is a schematic structural diagram of an embodiment of a positioning fixture for a press end lathe according to the present utility model.

Fig. 3 is a schematic structural diagram of a pressing mechanism of an embodiment of a positioning fixture for a press end lathe according to the present utility model.

Fig. 4 is a schematic structural diagram of a first fixing block and a second fixing block of an embodiment of a positioning fixture for a press end lathe according to the present utility model.

Fig. 5 is a schematic use diagram of an embodiment of a positioning fixture for a facing lathe according to the present utility model.

In the figure: the device comprises a 1-chuck, a 2-pressing mechanism, a 21-connecting seat, a 22-pressing rod, a 23-pressing block, a 3-fixing seat, a 31-fixing groove, a 4-first fixing block, a 41-V-shaped surface, a 42-clamping block, a 43-positioning block, a 5-second fixing block, a 51-limiting surface and a 6-special-shaped circular ring thin-wall part.

Detailed Description

The contents of the present utility model can be more easily understood by referring to the following detailed description of preferred embodiments of the present utility model and examples included. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. In case of conflict, the present specification, definitions, will control.

Example 1:

A special-shaped annular thin-wall part shown in fig. 1 is of an annular structure, is provided with a plurality of positioning notches, and is turned to the inner diameter.

The positioning fixture for the end face pressing lathe is shown in fig. 2-4, and the end face of the workpiece is axially pressed, so that the workpiece can be pressed and cannot be deformed when the special-shaped circular thin-wall part is turned, meanwhile, the workpiece is clamped into a groove of the part according to different axial heights, positioning is easier, and the time for alignment before machining is shortened.

A press end lathe positioning fixture, comprising: chuck 1, hold-down mechanism 2, fixing base 3, first fixed block 4, second fixed block 5, hold-down mechanism 2 installs on chuck 1, and fixing base 3 is concentric with chuck 1 and uses bolt fixed connection, and first fixed block 4 and second fixed block 5 pass through bolt fixed connection on fixing base 3.

The pressing mechanisms 2 are three and are uniformly distributed by taking the axis of the chuck 1 as the center. The pressing mechanism 2 comprises a connecting seat 21, a pressing rod 22 and a pressing block 23, wherein the connecting seat 21 is arranged on the chuck 1, the pressing rod 22 is arranged in the connecting seat 21, and the pressing block 23 is arranged at one end of the pressing rod 22. The pressing block 23 is rotatably connected to the pressing rod 22, and the pressing rod 22 is in threaded connection with the connecting seat 21. The pressing mechanism 2 is used for providing axial pressing force to press the workpiece, and the three pressing mechanisms 2 can provide uniform pressing force at three points of the workpiece, so that the workpiece is stable. Rotating the pressing rod 22 can enable the pressing rod 22 to move along the threaded hole in the connecting seat 21, so that the pressing block 23 is driven to press the workpiece.

The center of the chuck 1 is provided with a groove which is matched and connected with the fixed seat 3. The diameter of the groove is the same as the outer diameter of the fixed seat 3, so that the fixed seat 3 is connected stably.

The first fixing block 4 is provided with a V-shaped surface 41, and the included angle of the V-shaped surface 41 is 90 degrees. The second fixing block 5 is provided with a limiting surface 51. The V-shaped surface 41 and the stop surface 51 are tangential to a circle having the same midpoint on the axis of the chuck 1. The V-shaped surface 41 and the limiting surface 51 are used for positioning the workpiece and limiting the axis of the workpiece to be on the same straight line with the axis of the chuck 1, so that alignment before machining is facilitated.

The fixing seat 3 is provided with a fixing groove 31, the first fixing block 4 is provided with a clamping block 42, and the fixing groove 31 is in matched sliding connection with the clamping block 42. The engagement of the fixing groove 31 and the latch 42 can increase the stability of the first fixing block 4.

The first fixed block 4 is provided with a positioning block 43. The positioning block 43 is used for positioning a workpiece, and the positioning block 43 is clamped into a notch on the workpiece so as to limit the rotation of the workpiece along the axial direction, so that the clamping stability is improved. Meanwhile, the clamping blocks 42 enable the clamping and disassembling states of the workpiece to be consistent each time, and errors caused by repeated clamping are reduced.

Working principle: as shown in fig. 5, the chuck 1 is mounted on a spindle of a lathe, the fixing base 3 is placed in a fixing groove 31 on the chuck 1 and fixed, the first fixing block 4 and the second fixing block 5 are mounted on the fixing base 3, a workpiece is placed on a V-shaped surface 41 of the first fixing block 4, the positioning block 43 is clamped into a groove of the workpiece, and bolts connecting the first fixing block 4 and the second fixing block 5 with the fixing base 3 are screwed down, so that the workpiece is completely limited. Then the pressing rod 22 is rotated, and the pressing rod 22 rotates in a threaded hole in the connecting seat 21, so that the workpiece is pressed, the pressing force is in the axial direction of the workpiece, and the workpiece is prevented from being deformed due to overlarge radial clamping force.

The foregoing examples are illustrative only and serve to explain some features of the method of the utility model. The appended claims are intended to claim the broadest possible scope and the embodiments presented herein are merely illustrative of selected implementations based on combinations of all possible embodiments. It is, therefore, not the intention of the applicant that the appended claims be limited by the choice of examples illustrating the features of the utility model. Some numerical ranges used in the claims also include sub-ranges within which variations in these ranges should also be construed as being covered by the appended claims where possible.

Claims (10)

1. The utility model provides a press terminal surface lathe positioning fixture which characterized in that includes: the clamping device comprises a chuck, a pressing mechanism, a fixing seat, a first fixing block and a second fixing block, wherein the pressing mechanism is arranged on the chuck, the fixing seat is concentrically and fixedly connected with the chuck, and the first fixing block and the second fixing block are fixedly connected with the fixing seat.

2. The end face pressing lathe positioning fixture according to claim 1, wherein three pressing mechanisms are uniformly distributed centering on the chuck axis.

3. The press end lathe positioning fixture of claim 2, wherein the pressing mechanism comprises a connecting seat, a pressing rod and a pressing block, the connecting seat is arranged on the chuck, the pressing rod is arranged in the connecting seat, and the pressing block is arranged at one end of the pressing rod.

4. A press end face lathe positioning fixture according to claim 3, wherein the press block is rotatably connected to the press rod, and the press rod is screwed to the connection base.

5. The end face pressing lathe positioning fixture of claim 1, wherein the center of the chuck is provided with a groove which is in fit connection with the fixing seat.

6. The end face pressing lathe positioning fixture of claim 1, wherein the first fixing block is provided with a V-shaped surface.

7. The end face pressing lathe positioning fixture of claim 6, wherein the second fixing block is provided with a limiting surface.

8. The end mill lathe positioning fixture of claim 7, wherein the V-shaped surface and the stop surface are tangential to a circle having the same midpoint on the chuck axis.

9. The positioning fixture for a press end surface lathe according to claim 1, wherein the fixing seat is provided with a fixing groove, the first fixing block is provided with a clamping block, and the fixing groove is in matched sliding connection with the clamping block.

10. The end face pressing lathe positioning fixture of claim 1, wherein the first fixed block is provided with a positioning block.