CN211867148U

CN211867148U - Lathe fixture for machining eccentric hole

Info

Publication number: CN211867148U
Application number: CN202020444959.5U
Authority: CN
Inventors: 谭满红
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2020-11-06
Anticipated expiration: 2030-03-31

Abstract

The utility model relates to a lathe fixture for processing eccentric holes, which is fixedly arranged on a hydraulic four-jaw chuck of a horizontal lathe, a workpiece is clamped on the fixture, a plurality of inner circular holes are turned on the workpiece, and the inner circular holes are eccentric holes; the lathe fixture comprises a positioning bottom plate, a head end positioning block and three clamping blocks, wherein the positioning bottom plate is fixedly arranged on the plane of a chuck, the three clamping blocks are fixedly arranged on three clamping jaws of the chuck in a one-to-one correspondence mode, the head end positioning block is fixedly arranged on the plane of the chuck, the head end positioning block and the three clamping blocks are respectively positioned on four sides of the positioning bottom plate, the two opposite clamping blocks are side clamping blocks, the clamping block opposite to the head end positioning block is a tail end clamping block, a workpiece is arranged on the positioning bottom plate, the clamping jaws are movable, and the three clamping blocks perform centripetal and centrifugal reciprocating linear movement to clamp or loosen the; and clamping the workpiece, wherein an inner round hole to be processed is concentric with the axis of the chuck. The eccentric hole of the rectangular workpiece can be conveniently processed.

Description

Lathe fixture for machining eccentric hole

Technical Field

The utility model relates to a turning attachment, concretely relates to turning attachment of processing eccentric orfice.

Background

The three-claw chuck, the two-claw chuck and the three-claw chuck of the horizontal lathe have a self-centering function, so that the main function of the horizontal lathe is to turn and machine the excircle or the right-center inner hole of the bar, and the horizontal lathe has the advantages of high efficiency and high precision. However, in the actual production process, the inner holes of some parts are not at the geometric center of the parts, but are deviated from the geometric center by a certain distance, which increases unnecessary processing cost if a processing center is adopted, and cannot be processed if a lathe is not provided with a special fixture, so that a special fixture needs to be designed according to the processed product.

Disclosure of Invention

The utility model provides a turning attachment of processing eccentric orfice.

The technical scheme of the utility model:

a lathe fixture for processing eccentric holes is fixedly arranged on a hydraulic four-jaw chuck of a horizontal lathe, a workpiece is clamped on the fixture, a plurality of inner circular holes are turned on the workpiece, and the inner circular holes are eccentric holes; the lathe fixture comprises a positioning bottom plate, a head end positioning block and three clamping blocks, wherein the positioning bottom plate is fixedly arranged on the plane of a chuck, the three clamping blocks are fixedly arranged on three clamping jaws of the chuck in a one-to-one correspondence mode, the head end positioning block is fixedly arranged on the plane of the chuck, the head end positioning block and the three clamping blocks are respectively positioned on four sides of the positioning bottom plate, the two opposite clamping blocks are side clamping blocks, the clamping block opposite to the head end positioning block is a tail end clamping block, a workpiece is arranged on the positioning bottom plate, the clamping jaws are movable, and the three clamping blocks perform centripetal and centrifugal reciprocating linear movement to clamp or loosen the; and clamping the workpiece, wherein an inner round hole to be processed is concentric with the axis of the chuck. Of course, during the use of the present application, the hydraulic chuck has one jaw remaining and is connected to the lathe fixture, preferably, removed.

The head end positioning block is a counterweight positioning block to form a head end counterweight; the tail end clamping block is a counterweight clamping block to form a tail end counterweight; besides the size of the clamp meets the requirements of accurate positioning, supporting and clamping of the workpiece, the overall structure of the clamp and the workpiece are ensured to be simultaneously symmetrical about the X axis center, and the clamp is balanced in weight about the X axis center and the Y axis center so as to eliminate unbalanced force generated by eccentric clamping of the workpiece.

The head end positioning block is also provided with a workpiece reshaping adjusting pad which is fixed on the head end positioning block, positioned by a cylindrical positioning pin with internal threads and opposite to the tail end clamping block; the thickness of the workpiece reshaping adjusting pad depends on the eccentric distance of the processed inner circular hole and the groove of the workpiece, and finally the processed inner circular hole is enabled to be coincided with the lathe spindle; when the workpiece is remodeled, the production requirement can be met only by replacing the workpiece remodelling adjusting cushion block with corresponding thickness.

The inner circular holes are arranged in sequence, a ring groove is also turned on the periphery of each inner circular hole, and the ring groove and the inner circular holes are concentric.

The side clamping block is fixed on the fixing block and is fixedly connected with the clamping jaws of the chuck through the fixing block.

The utility model has the advantages that the following beneficial effects are produced,

1) the processing range of the original horizontal lathe is expanded, and parts with complicated shapes such as cuboids and cubes can be stably and reliably clamped.

2) Through the partial subassembly of quick replacement anchor clamps, can carry out the clamping to parts of same series and similar series, better implement the modularized design theory.

3) Through this special fixture, can be fast accurate to the automatic alignment in center of the interior round hole that the part was processed, need not artifical adjustment clamping position alright direct lathe work interior circular slot and hole.

4) The special fixture part is used for balancing weight by the structure thereof, so that unbalanced force caused by the deviation of a clamping workpiece from the axial lead of the chuck is eliminated to the maximum extent.

5) The special fixture has less accumulated scrap quantity in the machining process, 80-95% of scrap iron in the machining process is automatically unloaded during turning, and the rest scrap is easily cleaned manually when parts are replaced.

Drawings

FIG. 1 is a schematic view of a lathe fixture for machining eccentric holes to clamp a workpiece.

FIG. 2 is a schematic view of the mounting of the lathe fixture for machining eccentric holes.

Fig. 3 is a schematic view of a workpiece structure.

In the figure, a clamping jaw 1-2 lathe clamp 2 of a plane 1-1 chuck of a hydraulic four-jaw chuck 1 is used for positioning a bottom plate 2-1, a head end positioning block 2-2, a side clamping block 2-3, a tail end clamping block 2-4, a workpiece remodelling adjusting pad 2-5, a cylindrical positioning pin 2-6, a fixing block 2-7, an inner circular hole 3-1, and an annular groove 3-2 of a workpiece 3.

Detailed Description

As shown in fig. 1-3, a lathe fixture 2 for processing eccentric holes is fixedly arranged on a hydraulic four-jaw chuck 1 of a horizontal lathe, a workpiece 3 is clamped on the fixture 2, a plurality of inner circular holes 3-1 are turned on the workpiece 3, the inner circular holes 3-1 are sequentially arranged, a ring groove 3-2 is further turned on the periphery of each inner circular hole 3-and is concentric with the inner circular hole 3-1, and the inner circular hole 3-1 is an eccentric hole; the lathe fixture 2 comprises a positioning bottom plate 2-1, a head end positioning block 2-2 and three clamping blocks, wherein the positioning bottom plate 2-1 is fixedly arranged on a plane 1-1 of a chuck, the three clamping blocks are fixedly arranged on three clamping jaws 1-2 of the chuck in a one-to-one correspondence mode, the head end positioning block 2-2 is fixedly arranged on the plane 1-1 of the chuck, the head end positioning block 2-2 and the three clamping blocks are respectively positioned on four sides of the positioning bottom plate 2-1, the two opposite clamping blocks are side clamping blocks 2-3, the clamping block opposite to the head end positioning block 2-1 is a tail end clamping block 2-4, a workpiece 3 is arranged on the positioning bottom plate 2-1, the clamping jaws 1-2 move, and the three clamping blocks perform centripetal and centrifugal reciprocating linear movement to clamp or loosen the workpiece 3; clamping a workpiece 3, wherein an inner round hole to be processed is concentric with the axis of the chuck 1; the head end positioning block 2-2 is a counterweight positioning block to form a head end counterweight; the tail end clamping blocks 2-4 are counterweight clamping blocks to form tail end counterweights; the head end positioning block 2-2 is also provided with a workpiece shape changing adjusting pad 2-5, and the workpiece shape changing adjusting pad 2-5 is fixed on the head end positioning block 2-2, is positioned by a cylindrical positioning pin 2-6 with internal threads and is opposite to the tail end clamping block 2-2; the side clamping block 2-1 is fixed on the fixing block 2-7 and is fixedly connected with the clamping jaw 1-2 of the chuck through the fixing block 2-7.

Because of the limited character expression, there exist practically unlimited specific structures, and it will be apparent to those skilled in the art that a number of improvements, decorations, or changes may be made without departing from the principles of the present invention, or the above technical features may be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments.

Claims

1. A lathe fixture for processing eccentric holes is fixedly arranged on a hydraulic four-jaw chuck of a horizontal lathe, a workpiece is clamped on the fixture, a plurality of inner circular holes are turned on the workpiece, and the inner circular holes are eccentric holes; the lathe fixture is characterized by comprising a positioning bottom plate, a head end positioning block and three clamping blocks, wherein the positioning bottom plate is fixedly arranged on the plane of a chuck, the three clamping blocks are fixedly arranged on three clamping jaws of the chuck in a one-to-one correspondence mode, the head end positioning block is fixedly arranged on the plane of the chuck, the head end positioning block and the three clamping blocks are respectively positioned on four sides of the positioning bottom plate, the two opposite clamping blocks are side clamping blocks, the clamping block opposite to the head end positioning block is a tail end clamping block, a workpiece is arranged on the positioning bottom plate, the clamping jaws are movable, and the three clamping blocks perform centripetal and centrifugal reciprocating linear movement to clamp or loosen the workpiece; and clamping the workpiece, wherein an inner round hole to be processed is concentric with the axis of the chuck.

2. The turning attachment for machining an eccentric hole according to claim 1, wherein the head end positioning block is a counterweight positioning block, forming a head end counterweight; the tail end clamping block is a counterweight clamping block to form a tail end counterweight.

3. The turning attachment for machining an eccentric hole as claimed in claim 1, wherein the head end positioning block is further provided with a workpiece remodelling adjusting pad, the workpiece remodelling adjusting pad is fixed to the head end positioning block and is positioned by a cylindrical positioning pin with an internal thread and is opposite to the tail end clamping block.

4. The turning attachment for an eccentric hole according to claim 1, wherein a plurality of inner circular holes are arranged in series, and each inner circular hole is further provided with a ring groove on the outer circumference thereof, the ring groove being concentric with the inner circular hole.

5. The turning attachment for the machining of an eccentric hole of claim 1, wherein the side clamping blocks are fixed on the fixing block and fixedly connected with the clamping jaws of the chuck through the fixing block.