CN215788185U

CN215788185U - Diameter-variable self-centering device

Info

Publication number: CN215788185U
Application number: CN202121271687.4U
Authority: CN
Inventors: 宋爱平; 卢重望; 潘建州; 闫创
Original assignee: Yangzhou University
Current assignee: Yangzhou University
Priority date: 2020-11-05
Filing date: 2021-06-08
Publication date: 2022-02-11
Anticipated expiration: 2031-06-08

Abstract

The utility model discloses a diameter-variable self-centering device in the technical field of lathe processing, which comprises an inner guide plate fixed on a machine tool, wherein the left end of the inner guide plate is connected with an outer baffle plate, the upper part and the lower part of the inner guide plate are respectively connected with an upper inclined wedge and a lower inclined wedge which can slide in the height direction and are oppositely arranged, the upper inclined wedge extending out of the outer baffle plate is connected with an upper clamping block, the lower inclined wedge extending out of the outer baffle plate is connected with a lower clamping block, the inner guide plate is slidably connected with a movable block capable of moving left and right, the downward ends of the upper clamping block and the lower clamping block, which are opposite to the side where the outer baffle plate is arranged, are slidably connected with an intermediate transmission slide block, the intermediate transmission slide block is slidably connected on the inner guide plate, and the intermediate transmission slide block can horizontally move in the left and right directions; the utility model can automatically clamp and position and has reliable clamping.

Description

Diameter-variable self-centering device

Technical Field

The utility model belongs to the technical field of lathe machining, and particularly relates to a diameter-variable self-centering device.

Background

The center frame is generally used as an auxiliary positioning and clamping tool and widely applied to lathes, when the lathes process some long shaft workpieces with weak rigidity, in order to avoid the vibration and deformation phenomena generated after the workpieces are influenced by cutting force and self gravity and improve the processing quality of the surfaces of the workpieces, the center frame is required to be used for auxiliary positioning and clamping, however, the positioning diameter of the traditional center frame is fixed at present, auxiliary positioning is difficult to perform on some bent levers or slender shafts with conicity, and when longer shaft workpieces are processed, the position of the center frame needs to be adjusted for many times and positioning and clamping are performed again, so that the processing efficiency is greatly influenced.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to solve the technical problem of difficult positioning and clamping in the prior art, and provides a diameter-variable self-centering device which can automatically position and clamp and improve the processing efficiency.

The purpose of the utility model is realized as follows: the utility model provides a but variable diameter from centring means, is including fixing the interior deflector on the lathe, the left end of interior deflector is connected with outer baffle, the upper portion and the lower part of interior deflector are connected with respectively can be in the direction of height slip and relative last slide wedge and the lower slide wedge that sets up, stretch out to be connected with the grip block on the outer last slide wedge of outer baffle, stretch out to be connected with down the grip block on the outer lower slide wedge of outer baffle, be connected with the movable block that removes on the interior deflector slidable, upward the relative outer baffle of slide wedge and lower slide wedge sets up the downward one end slidable of one side and is connected with middle transmission slider, stretch out to be connected with the side grip block on the outer middle transmission slider of outer baffle, middle transmission slider slidable connects on the deflector including, middle transmission slider can be at the horizontal migration of left and right directions.

In the utility model, the outer baffle is provided with two guide ports which are arranged at intervals in the height direction, the upper inclined wedge can lift in the upper guide port, and the lower inclined wedge can lift in the lower guide port; the moving block moves rightwards, so that the upper wedge and the lower wedge move upwards and downwards synchronously respectively, the upper clamping roller and the lower clamping roller perform expanding actions, when a workpiece needs to be clamped, the moving block moves reversely, the upper clamping roller moves downwards, and meanwhile, the lower clamping roller moves upwards until the clamping roller is contacted with the workpiece; the utility model realizes point contact during clamping and positioning, reduces friction force and has reliable clamping; the method can be applied to the work of positioning the workpiece during processing; the method can be applied to the work of positioning the workpiece during machining.

In order to further realize the lifting of the upper wedge and the lower wedge, one upward end of the moving block is fixedly connected with an upper inclined plane guide block, the upper inclined plane guide block is slidably connected with one downward end of the upper wedge, one downward end of the moving block is fixedly connected with a lower inclined plane guide block, the lower inclined plane guide block is slidably connected with one upward end of the lower wedge, the upper part of the middle transmission slide block is slidably connected with the other downward end of the upper wedge, and the lower part of the middle transmission slide block is slidably connected with the other upward end of the lower wedge.

In order to further realize the movement of the moving block, a linear driver is fixedly connected to the right end of the inner guide plate, a driving rod extending towards the moving block is connected to the linear driver, and the outer end of the driving rod is connected with the moving block.

In order to further improve the reliability that goes up the slide wedge and go up and down the slide wedge lift, the upper portion fixedly connected with of interior deflector goes up the fixing base, and the lower part fixedly connected with of interior deflector goes up the fixing base down, it has last lift groove to go up to open on the fixing base, it has lower lift groove to open on the fixing base down, goes up the fixing base and is connected with the top shoe through going up lift groove slidable, and lower fixing base is connected with down the slider through going up lift groove slidable, go up slide wedge and top shoe fixed connection, slide wedge and lower slider fixed connection down.

As a further improvement of the present invention, the upper wedge and the lower wedge are symmetrically disposed about the center of the moving block in the height direction, and the perpendicular bisectors of the upper clamping block, the lower clamping block, and the side clamping block always intersect at one point.

In order to further improve the reliability of the horizontal movement of the moving block, two horizontal guide rails which are arranged at intervals in the height direction are fixedly connected to the inner guide plate, and the moving block is slidably connected to the guide rails.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a perspective view of the present invention.

Fig. 3 is a partially enlarged view of a portion a in fig. 2.

Fig. 4 is a structural view of the working principle of the intermediate transmission slide block in the utility model.

The device comprises a linear driver 1, a driving rod 2, a side clamping block 3, a lower wedge 4, a lower clamping block 5, an upper clamping block 6, an upper wedge 7, an intermediate transmission slide block 8, an upper fixed seat 9, an upper slide block 10, an inner guide plate 11, a movable block 12, a lower fixed seat 13, a lower slide block 14, an upper inclined guide block 15, a lower inclined guide block 16, a fixed slide seat 17, a sliding groove 18, a guide rail 19, an outer baffle 20 and a guide opening 21.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

As shown in fig. 1 to 4, the variable diameter self-centering device includes an inner guide plate 11 fixed on a machine tool, an outer baffle plate 20 is connected to a left end of the inner guide plate 11, an upper inclined wedge 7 and a lower inclined wedge 4 which are slidable in a height direction and are oppositely disposed are respectively connected to an upper portion and a lower portion of the inner guide plate 11, an upper clamping block 6 is connected to the upper inclined wedge 7 extending out of the outer baffle plate 20, a lower clamping block 5 is connected to the lower inclined wedge 4 extending out of the outer baffle plate 20, a moving block 12 is slidably connected to the inner guide plate 11, two guide rails 19 which are spaced and horizontal in the height direction are fixedly connected to the inner guide plate 11, the moving block 12 is slidably connected to the guide rails 19, a linear driver 1 is fixedly connected to a right end of the inner guide plate 11, a driving rod 2 extending towards a direction of the moving block 12 is connected to the linear driver 1, and an outer end of the driving rod 2 is connected to the moving block 12; go up slide wedge 7 and lower slide wedge 4 one side outwards slidable be connected with middle transmission slider 8, be connected with side grip block 3 on stretching out the outer baffle middle transmission slider 8, middle transmission slider 8 slidable is connected including on deflector 11, middle transmission slider 8 can be at horizontal migration about the direction, go up slide wedge 7 and lower slide wedge 4 about the central symmetry setting of movable block 12 on the direction of height, the perpendicular bisector of middle transmission slider 8 and movable block 12 flushes, fixedly connected with fixed slide 17 on the interior deflector 11, it has spout 18 to open on the fixed slide 17, middle transmission slider 8 is connected with on the fixed slide 17 through spout 18 slidable, go up grip block 6, the perpendicular bisector of lower grip block 5 and side grip block 3 is handed over a bit all the time, go up grip block 6, lower grip block 5 and side grip block 3 all are the V type.

In order to further realize the lifting of the upper inclined wedge 7 and the lower inclined wedge 4, an upward end of the moving block 12 is fixedly connected with an upper inclined plane guide block 15, the upper inclined plane guide block 15 is slidably connected with a downward end of the upper inclined wedge 7, a downward end of the moving block 12 is fixedly connected with a lower inclined plane guide block 16, the lower inclined plane guide block 16 is slidably connected with an upward end of the lower inclined wedge 4, the upper part of the intermediate transmission slide block 8 is slidably connected with a downward end of the upper inclined wedge 7, and the lower part of the intermediate transmission slide block 8 is slidably connected with an upward other end of the lower inclined wedge 4.

In order to further improve the lifting reliability of the upper inclined wedge 7 and the lower inclined wedge 4, the upper portion of the inner guide plate 11 is fixedly connected with an upper fixed seat 9, the lower portion of the inner guide plate 11 is fixedly connected with a lower fixed seat 13, an upper lifting groove is formed in the upper fixed seat 9, a lower lifting groove is formed in the lower fixed seat 13, the upper fixed seat 9 is slidably connected with an upper sliding block 10 through the upper lifting groove, the lower fixed seat 13 is slidably connected with a lower sliding block 14 through the lower lifting groove, the upper inclined wedge 7 is fixedly connected with the upper sliding block 10, and the lower inclined wedge 4 is fixedly connected with the lower sliding block 14.

In the utility model, the upper inclined wedge 7 can be lifted in the upper guide opening 21, the lower inclined wedge 4 can be lifted in the lower guide opening 21, the upper clamping block 6, the lower clamping block 5 and the side clamping block 3 are preferably made of copper materials, and the linear driver 1 is an air cylinder; firstly, an inner guide plate 11 is installed and fixed on a side plate of a machine tool guide rail and is matched with a tool changing frame at the same time, so that the inner guide plate can slide along the machine tool guide rail along with a turning tool, before the linear driver 1 is used, a driving rod 2 extends outwards, a moving block 12 horizontally moves leftwards under the pushing of the driving rod 2, an upper inclined plane guide block 15 pushes an upper inclined wedge 7 upwards, a lower inclined plane guide block 16 pushes a lower inclined wedge 4 downwards, an intermediate transmission slide block 8 moves rightwards along a fixed slide seat 17 under the pulling force of the upper inclined wedge 7 and the lower inclined wedge 4, the expansion action of three clamping blocks is realized, and the positioning diameter is increased; when a workpiece is positioned and clamped, the linear driver 1 reversely acts, the driving rod 2 retracts rightwards, the driving rod 2 pulls the moving block 12 to move rightwards, the upper inclined plane guide block 15 pulls the upper inclined wedge 7 to move downwards, the lower inclined plane guide block 16 pulls the lower inclined wedge 4 to move upwards, the middle transmission slide block 8 moves leftwards along the fixed slide seat 17 after being pressed by the upper inclined wedge 7 and the lower inclined wedge 4, the pressing action of the three clamping blocks is realized, the positioning diameter is reduced, and when the workpiece is pressed, the linear driver 1 stops acting; when the diameter of the outer cylindrical surface or the conical surface of the workpiece is changed, the three clamping blocks can still keep the pressing action on the outer cylindrical surface or the outer conical surface of the workpiece under the continuous acting force of the driving rod 2 of the cylinder; the automatic clamping device is ingenious in structure, can automatically position and clamp a workpiece, saves the process time of repeated clamping and positioning, and greatly improves the production efficiency; the method can be applied to the work of positioning the workpiece during machining.

The present invention is not limited to the above embodiments, and based on the technical solutions disclosed in the present invention, those skilled in the art can make some substitutions and modifications to some technical features without creative efforts based on the disclosed technical solutions, and these substitutions and modifications are all within the protection scope of the present invention.

Claims

1. The utility model provides a but variable diameter is from centring means, its characterized in that, is including fixing the interior deflector on the lathe, the left end of interior deflector is connected with outer baffle, the upper portion and the lower part of interior deflector are connected with respectively can slide in the direction of height and relative last slide wedge and the lower slide wedge that sets up, are connected with the grip block on the last slide wedge that stretches out outside the baffle, are connected with down the grip block on the lower slide wedge that stretches out outside the baffle, be connected with the movable block that removes on the interior deflector slidably, the downward one end slidable that goes up slide wedge and the relative outer baffle of lower slide wedge set up one side is connected with middle transmission slider, is connected with the side grip block on the middle transmission slider that stretches out outside the baffle, middle transmission slider slidable is connected on the interior deflector, and middle transmission slider can be at left and right directions upward horizontal migration.

2. The variable diameter self-centering device according to claim 1, wherein an upper ramp guide block is fixedly connected to an upward end of the moving block, the upper ramp guide block is slidably connected to a downward end of the upper ramp, a lower ramp guide block is fixedly connected to a downward end of the moving block, the lower ramp guide block is slidably connected to an upward end of the lower ramp, an upper portion of the intermediate transmission slide block is slidably connected to a downward end of the upper ramp, and a lower portion of the intermediate transmission slide block is slidably connected to an upward end of the lower ramp.

3. The variable diameter self-centering device according to claim 2, wherein a linear driver is fixedly connected to the right end of the inner guide plate, a driving rod extending toward the moving block is connected to the linear driver, and the outer end of the driving rod is connected to the moving block.

4. The variable diameter self-centering device according to any one of claims 1 to 3, wherein an upper fixing seat is fixedly connected to an upper portion of the inner guide plate, a lower fixing seat is fixedly connected to a lower portion of the inner guide plate, an upper lifting groove is formed in the upper fixing seat, a lower lifting groove is formed in the lower fixing seat, an upper sliding block is slidably connected to the upper fixing seat through the upper lifting groove, a lower sliding block is slidably connected to the lower fixing seat through the lower lifting groove, the upper wedge is fixedly connected to the upper sliding block, and the lower wedge is fixedly connected to the lower sliding block.

5. The variable diameter self-centering device according to any one of claims 1 to 3, wherein the upper wedge and the lower wedge are symmetrically arranged about the center of the moving block in the height direction, and the perpendicular bisectors of the upper clamping block, the lower clamping block and the side clamping block always intersect at one point.

6. The diameter-variable self-centering device according to any one of claims 1 to 3, wherein two horizontal guide rails are fixedly connected to the inner guide plate at intervals in the height direction, and the moving block is slidably connected to the guide rails.