CN110579164A - A circular workpiece synchronous clamping eccentricity detection device - Google Patents

Abstract

The invention discloses a circular workpiece synchronous clamping eccentricity detection device, which comprises a detection device body and a clamping rotation mechanism. The detection device body is arranged on the clamping rotation mechanism; Cylindrical, the inner cavity of the ring mounting seat forms a clamping area, and the detection device body is arranged around the center line of the ring mounting seat; the detection device body includes a sliding part and a detection part, and the sliding part is movably inserted into the cylinder wall of the ring mounting seat to detect The part is fixedly installed on the sliding part, and the detection part is provided with an alignment mark. Using the circular workpiece synchronous clamping eccentric detection device of the present invention, after the cylindrical workpiece to be welded is fixed, by detecting the scale line on the support rod, it can immediately find whether there is any deviation in the positioning of the cylindrical workpiece to be welded and adjust the clamping cylinder in time to ensure the stability of the rotation of the cylindrical workpiece to be welded during welding and improve the welding quality.

Description

A circular workpiece synchronous clamping eccentricity detection device

technical field

The invention relates to a detection device, in particular to a circular workpiece synchronous clamping eccentricity detection device.

Background technique

Friction stir welding refers to the use of the heat generated by the friction between the high-speed rotating welding tool and the workpiece to locally melt the welded material. When the welding tool moves forward along the welding interface, the plasticized material is under the action of the rotating friction of the welding tool. It flows from the front of the welding tool to the rear, and forms a dense solid-phase weld under the extrusion of the welding tool. When using friction stir welding to weld two cylindrical workpieces to be welded, the ends of the two cylindrical workpieces to be welded should be pressed tightly, and the two cylindrical workpieces to be welded are fixed by a clamping device, and the welding tool Fixed, the welding stirring head extends into the seam from the outside of the cylindrical workpiece to be welded, and then the two cylindrical workpieces to be welded are rotated synchronously to achieve welding; during the welding process, the rotation center of the cylindrical workpiece to be welded needs to be Keep stable, and a stable support needs to be set inside the seam of the cylindrical workpiece to be welded to support the pressure of the welding stirring head on the cylindrical workpiece to be welded.

When the existing clamping device, rotating device, and internal supporting device are applied to the friction stir welding of the cylindrical workpiece to be welded, the following technical problems exist:

1. The most commonly used method for the inner support device is to set a rigid circular inner support, but for different sizes of cylindrical workpieces to be welded, it is necessary to set a corresponding size circular inner support, and at the same time, in order to make the circular inner support The outer surface of the outer surface is stably attached to the abutting part of the cylindrical workpiece to be welded, and the processing accuracy of the circular inner support is high, resulting in a higher manufacturing cost of the circular inner support;

Later, in the paper "Friction Stir Welding Process with Rigid Dynamic Support", the researchers provided an internal support device for friction stir welding of girth welds. Only the support wheels are used to support the back of the cylindrical workpiece to be welded, so as to ensure the support provided by the support wheels and The upsetting force exerted by the welding machine is balanced with each other, while the support wheel rotates along its own axis, so that it can "applicable to a wide range of diameters, and there is no need to manufacture special tooling according to different product diameters like the traditional welding process, and it is applicable to the state of the parts powerful". However, there are also problems in this scheme that the contact area between the support wheel and the cylindrical workpiece to be welded is too small, slipping or loosening between the support wheel and the cylindrical workpiece to be welded, and the rotation of the cylindrical workpiece to be welded along the weld seam direction During the process, it is difficult to ensure the stability of the cylindrical workpiece to be welded when it comes into contact with the welding stirring head.

2. The clamping device and the rotating device are independently arranged, and the volume of the two is large and the synchronization is poor.

3. When the cylindrical workpiece to be welded is rotating, its axis may shift, but it cannot be detected in time, thus affecting the contact relationship between the cylindrical workpiece to be welded and the stirring head.

Contents of the invention

In order to solve the problem that the axial center deviation cannot be found in time when the cylindrical workpiece to be welded is clamped, the present invention provides a device capable of detecting the positioning of the cylindrical workpiece to be welded, which has the advantages of fast detection, simple structure and obvious effect The advantages.

The technical solution is as follows:

A circular workpiece synchronous clamping eccentricity detection device, its key lies in: comprising a detection device body and a clamping rotation mechanism, the detection device body is arranged on the clamping rotation mechanism;

The clamping and rotating mechanism includes an annular mounting seat, the annular mounting seat is cylindrical, the center line of the annular mounting seat is arranged horizontally, the inner cavity of the annular mounting seat forms the clamping area, and the detection The device body is arranged around the centerline of the annular mount;

The detection device body includes a sliding part and a detection part, the sliding part is movably inserted into the cylinder wall of the annular mounting seat, the sliding direction of the sliding part is parallel to the centerline of the annular mounting seat, and the detection part fixedly installed on the sliding part, the detection part is provided with an alignment mark

The remarkable effect of adopting the above technical scheme is: after the annular workpiece to be tested is clamped and fixed, it can be observed in time whether the annular workpiece to be tested is aligned with the standard position through the alignment mark on the detection part, so as to quickly find the annular workpiece to be tested It is convenient to adjust the clamping state of the annular workpiece to be tested in time to avoid affecting the welding effect.

The sliding part includes three sliding struts, and three sliding holes pass through the cylinder wall of the annular mounting seat, all the sliding holes are evenly distributed around the centerline of the annular mounting seat, and all the sliding holes are The direction of the centerline is parallel to the center line of the annular mounting seat, and the three sliding struts correspond to the three sliding holes one by one, and the sliding struts are movably arranged in the corresponding sliding holes. The two ends of the sliding rod protrude from the sliding hole respectively. The advantage of adopting the above technical solution is that the sliding rod slides in the corresponding sliding hole, the detection part can slide with the sliding rod, and the sliding rod is adjusted according to the length of the annular workpiece to be welded, so that the detection part As close as possible to the ring-shaped workpiece to be welded, it is easy to align.

The detection part includes three detection rods, the three detection rods are respectively arranged along the radial direction of the annular mount, and the three detection rods are distributed around the center line of the ring mount, The inner ends of the three detection poles are connected to each other, the connection points of the three detection poles are located on the center line of the annular mount, and the three detection poles are located on the same side of the annular mount, The three detection rods correspond to the three sliding rods one by one, the outer ends of the three detection rods are fixedly connected to the corresponding three sliding rods, and the free ends of the sliding rods Respectively provided with a stop protrusion.

Scale marks are provided on the three detection poles along their respective length directions to form the alignment marks.

The advantage of adopting the above technical solution is that the structure is light and stable, the scale line can clearly reflect the alignment of the cylindrical workpiece to be welded, and it is convenient to adjust.

There are at least three clamping cylinders in the installation inner cylinder, all the clamping cylinders are evenly distributed around the center line of the installation inner cylinder, and the piston rods of all the clamping cylinders are facing the installation inner cylinder centerline of .

The clamping and rotating mechanism further includes an installation inner cylinder, the annular installation seat and the installation inner cylinder are arranged concentrically, and the installation inner cylinder is installed on the annular installation seat through a connecting bearing.

The outer wall of the installation inner cylinder is pressed against the inner ring of the connecting bearing;

All the clamping cylinders are uniformly arranged on the inner wall of the installation inner cylinder, and the piston rods of all the clamping cylinders are facing the center line of the installation inner cylinder.

The advantage of adopting the above technical solution is that after the clamping cylinder clamps the cylindrical workpiece to be welded, the clamping cylinder can rotate with the installation inner cylinder to drive the cylindrical workpiece to be welded.

The clamping and rotating mechanism also includes a mounting base, the outer wall of the annular mounting base is fixed on the mounting base, and the centerline of the circular mounting base is horizontally arranged;

The installation base is also provided with a drive device, the drive device includes a geared motor, the housing of the geared motor is fixedly installed on the installation base, and an inner ring gear is provided in the connecting bearing. The outer edge of the inner ring gear is pressed against the inner wall of the connecting bearing, the centerline of the inner ring gear coincides with the center line of the inner cylinder, and the output shaft of the geared motor extends into the inner wall of the inner ring gear In the inner ring, a drive gear is provided on the output shaft of the reduction motor, and the drive gear meshes with the ring gear.

Using the above technical scheme, using the geared motor as the power, the geared motor is used to drive the inner ring gear to rotate, and then the inner ring gear drives the installation inner cylinder to rotate, so that the cylindrical workpiece to be welded can rotate.

The inner ring gear is connected with the installation inner cylinder, and several connecting rods are inserted on the inner ring gear, all the connecting rods are parallel to the center line of the inner ring gear, and all the connecting rods surround the inner ring gear. The center line of the inner ring gear is evenly arranged, and all the connecting rods pass through the inner ring gear and then extend into the wall of the installation inner cylinder. The advantage of adopting the above technical solution is that the connecting rod is used to strengthen the connection strength between the inner ring gear and the installation inner cylinder, so as to ensure that when the inner ring gear rotates, the inner ring gear can effectively drive the Install the inner cylinder to rotate.

Arc-shaped slips are arranged on the output end of the clamping cylinder.

Beneficial effect: after the cylindrical workpiece to be welded is fixed, by detecting the scale line on the support rod, it can be found immediately whether there is a deviation of the rotation center of the cylindrical workpiece to be welded, so that the operator can find and adjust it in time The clamping cylinder ensures the stability of the rotation of the cylindrical workpiece to be welded during welding and improves the welding quality.

Description of drawings

Fig. 1 is the structural representation of embodiment 1;

Fig. 2 is A-A sectional view of Fig. 1;

Fig. 3 is the structural representation of embodiment 2;

Fig. 4 is the top view of Fig. 3;

Fig. 5 is the B-B sectional view of Fig. 3;

Fig. 6 is a structural schematic diagram of a rolling inner support device;

Fig. 7 is the left view of Fig. 6;

Fig. 8 is a schematic diagram of the state of the rigid elastic cylinder 9 in Fig. 6 after being squeezed;

Fig. 9 is the left view of Fig. 8;

Fig. 10 is a schematic diagram of a rolling type internal support device;

Fig. 11 is the left view of Fig. 10;

Fig. 12 is a schematic diagram of the state of the rigid elastic cylinder 9 in Fig. 10 after being squeezed;

Fig. 13 is the left side view of Fig. 12;

Fig. 14 is a schematic structural view of the rigid elastic cylinder 9;

Fig. 15 is a partially enlarged view X of Fig. 14;

Fig. 16 is a structural schematic diagram of the extrusion state of the rigid elastic cylinder 9;

Fig. 17 is a partially enlarged view Y of Fig. 16;

Fig. 18 is a front view of Fig. 14 .

Detailed ways

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

Example 1:

As shown in Figures 1 to 2, a circular workpiece synchronous clamping eccentricity detection device includes a detection device body and a clamping rotation mechanism, and the detection device body is arranged on the clamping rotation mechanism;

The clamping and rotating mechanism includes an annular mounting base 25, an installation inner cylinder 31, and an installation base 28. The outer wall of the annular mounting base 25 is fixed on the mounting base 28, and the centerline of the annular mounting base 25 is horizontal. set up;

The annular mounting seat 25 is cylindrical, the centerline of the annular mounting seat 25 is arranged horizontally, the inner cavity of the annular mounting seat 25 forms the clamping area, and the detection device body surrounds the annular mounting seat 25 centerline; the annular mounting seat 25 and the installation inner cylinder 31 are concentrically arranged, and the installation inner cylinder 31 is installed on the annular installation seat 25 through the connecting bearing 26 .

The outer wall of the installation inner cylinder 31 is pressed against the inner ring of the connecting bearing 26;

The installation base 28 is also provided with a drive device, the drive device includes a reduction motor 29, the housing of the reduction motor 29 is fixedly installed on the installation base 28, and the connection bearing 26 is provided with an internal Ring gear 30, the outer edge of the inner ring gear 30 is pressed against the inner wall of the connecting bearing 26, the center line of the inner ring gear 30 coincides with the center line of the installation inner cylinder 31, and the reduction motor 29 The output shaft of the motor extends into the inner ring of the ring gear 30 , and the output shaft of the reduction motor 29 is provided with a driving gear, and the driving gear meshes with the ring gear 30 .

The inner ring gear 30 is connected to the installation inner cylinder 31, and several connecting rods 32 are inserted on the inner ring gear 30, all the connecting rods 32 are parallel to the center line of the inner ring gear 30, all The connecting rods 32 are evenly arranged around the center line of the ring gear 30, and all the connecting rods 32 pass through the ring gear 30 and then extend into the cylinder wall of the installation inner cylinder 31. The connecting rods 32 The ring gear 30 and the installation inner cylinder 31 are fixedly connected as a whole.

All the clamping cylinders 27 are evenly arranged on the inner wall of the installation inner cylinder 31 , and the piston rods of all the clamping cylinders 27 are facing the centerline of the installation inner cylinder 31 .

At least three clamping cylinders 27 are also arranged in the installation inner cylinder 31, and all the clamping cylinders 27 are evenly distributed around the centerline of the installation inner cylinder 31, and the piston rods of all the clamping cylinders 27 are directed toward The center line of the inner cylinder 31 is installed, and the output end of the clamping cylinder 27 is provided with arc-shaped slips.

The detection device body includes a sliding part and a detecting part, the sliding part is movably inserted into the cylinder wall of the annular mounting seat 25, the sliding direction of the sliding part is parallel to the centerline of the annular mounting seat 25, the The detection part is fixedly installed on the sliding part, and alignment marks are arranged on the detection part.

Specifically: the sliding part includes three sliding struts 35, and three sliding holes pass through the cylinder wall of the annular mounting seat 25, and all the sliding holes are evenly distributed around the centerline of the annular mounting seat 25, all The direction of the hole center line of the sliding hole is parallel to the center line of the annular mounting base 25, and the three sliding struts 35 correspond to the three sliding holes one by one, and the sliding struts 35 are movably arranged on the In the corresponding sliding hole, two ends of the sliding rod 35 protrude from the sliding hole respectively.

The detection part includes three detection poles 36, and the three detection poles 36 are respectively arranged along the radial direction of the annular mounting seat 25, and the three detection poles 36 are arranged around the center of the annular mounting base 25. The lines are distributed in a circular direction, the inner ends of the three detection poles 36 are connected to each other, the connection points of the three detection poles 36 are located on the center line of the annular mounting seat 25, and the three detection poles 36 Located on the same side of the annular mount 25, the three detection rods 36 correspond to the three sliding rods 35 one by one, and the outer ends of the three detection rods 36 correspond to the corresponding three sliding rods. The poles 35 are fixedly connected, the free ends of the sliding poles 35 are respectively provided with anti-retraction protrusions, and the three detection poles 36 are respectively provided with scale marks along their respective length directions to form the alignment marks. .

Example 2:

As shown in Figures 3 to 18, a friction stir welding system for a cylindrical workpiece includes a workbench, which is provided with an inner support device, a welding tool (not shown in the figure) and two sets of clamping and rotating mechanisms, The inner support device is located between the two sets of clamping and rotating mechanisms, and the stirring head 37 of the welding tool is located above the inner support device;

The clamping and rotating mechanism includes an annular mounting base 25, an installation inner cylinder 31, and an installation base 28. The outer wall of the annular mounting base 25 is fixed on the mounting base 28, and the centerline of the annular mounting base 25 is horizontal. Set, the installation base 28 is slidably fitted on the workbench, the centerlines of the ring mounting seats 25 of the two groups of clamping and rotating mechanisms coincide, and the sliding direction of the mounting base 28 is the same as that of the ring mounting seats. 25 parallel to the centerline.

The annular mounting seat 25 is cylindrical, and the center line of the annular mounting seat 25 is arranged horizontally. The inner cavity of the annular mounting seat 25 forms a clamping area. The annular mounting seat 25 and the installation inner cylinder 31 Concentrically arranged, the installation inner cylinder 31 is installed on the annular mounting seat 25 through the connection bearing 26, and the outer wall of the installation inner cylinder 31 is pressed against the inner ring of the connection bearing 26;

The installation base 28 is provided with a drive device, the drive device includes a geared motor 29, the housing of the geared motor 29 is fixedly mounted on the installation base 28, and the connecting bearing 26 is provided with internal teeth Ring 30, the outer edge of the inner ring gear 30 is pressed against the inner wall of the connecting bearing 26, the center line of the inner ring gear 30 coincides with the center line of the installation inner cylinder 31, and the gear motor 29 The output shaft extends into the inner ring of the ring gear 30 , and the output shaft of the reduction motor 29 is provided with a driving gear, and the driving gear meshes with the ring gear 30 .

The inner ring gear 30 is connected to the installation inner cylinder 31, and several connecting rods 32 are inserted on the inner ring gear 30, all the connecting rods 32 are parallel to the center line of the inner ring gear 30, all The connecting rods 32 are evenly arranged around the center line of the ring gear 30, and all the connecting rods 32 pass through the ring gear 30 and then extend into the cylinder wall of the installation inner cylinder 31. The connecting rods 32 The ring gear 30 and the installation inner cylinder 31 are fixedly connected as a whole.

At least three clamping cylinders 27 are also arranged in the installation inner cylinder 31, and all the clamping cylinders 27 are uniformly arranged on the inner wall of the installation inner cylinder 31, and all the clamping cylinders 27 surround the installation inner cylinder. The center line of the barrel 31 is evenly distributed, and the piston rods of all the clamping cylinders 27 are facing the center line of the inner barrel 31, and the output end of the clamping cylinder 27 is provided with arc-shaped slips.

On the annular mounts 25 of the two groups of clamping and rotating mechanisms, a detection device body is respectively provided, and the detection device body is arranged around the centerline of the ring mounts 25;

The detection device body includes a sliding part and a detecting part, the sliding part is movably inserted into the cylinder wall of the annular mounting seat 25, the sliding direction of the sliding part is parallel to the centerline of the annular mounting seat 25, the The detection part is fixedly installed on the sliding part, the detection part is located outside the corresponding clamping and rotating mechanism, and an alignment mark is provided on the detection part. Specifically: the sliding part includes three sliding struts 35, and three sliding holes pass through the cylinder wall of the annular mounting seat 25, and all the sliding holes are evenly distributed around the centerline of the annular mounting seat 25, all The direction of the hole center line of the sliding hole is parallel to the center line of the annular mounting base 25, and the three sliding struts 35 correspond to the three sliding holes one by one, and the sliding struts 35 are movably arranged on the In the corresponding sliding hole, two ends of the sliding rod 35 protrude from the sliding hole respectively.

The detection part includes three detection poles 36, and the three detection poles 36 are respectively arranged along the radial direction of the annular mounting seat 25, and the three detection poles 36 are arranged around the center of the annular mounting base 25. The lines are distributed in a circular direction, the inner ends of the three detection poles 36 are connected to each other, the connection points of the three detection poles 36 are located on the center line of the annular mounting seat 25, and the three detection poles 36 Located on the same side of the annular mount 25, the three detection rods 36 correspond to the three sliding rods 35 one by one, and the outer ends of the three detection rods 36 correspond to the corresponding three sliding rods. The poles 35 are fixedly connected, the free ends of the sliding poles 35 are respectively provided with anti-retraction protrusions, and the three detection poles 36 are respectively provided with scale marks along their respective length directions to form the alignment marks. .

An inner support mount is also slidably mounted on the workbench, and the sliding direction of the inner support mount is consistent with the sliding direction of the installation base 28, and the inner support mount is located at any one of the clamping and rotating mechanisms. On the outside, a fixed mounting arm 8 is horizontally and fixedly installed on the inner support mounting seat. The length direction of the fixed mounting arm 8 is parallel to the center line of the annular mounting seat 25. One end of the fixed mounting arm 8 is fixed to the inner support mounting seat. Above, the other end of the fixed installation arm 8 passes through the installation inner cylinder 31 of the clamping rotation mechanism close to it, and the fixed installation arm 8 is eccentrically arranged relative to the center line of the installation inner cylinder 31 to avoid The detection pole 36 is fixedly provided with the inner support device at the free end of the fixed installation arm 8 .

The above-mentioned internal support device can be implemented in the following two specific ways:

In the first specific embodiment, the internal support device is a rolling support structure, and the dynamic support structure includes a rigid elastic cylinder 9 and a telescopic device, the rigid elastic cylinder 9 is installed on the telescopic device, and the telescopic device vertically installed on the fixed mounting arm 8;

The telescopic device includes a mounting plate 11 and a telescopic cylinder 12, the telescopic cylinder 12 is vertically arranged, the piston rod of the telescopic cylinder 12 faces upward, and the mounting plate 11 is horizontally arranged on the upper end of the piston rod of the telescopic cylinder 12 , the rigid elastic cylinder 9 is horizontally arranged above the installation plate 11;

Two mounting lugs 13 are vertically opposite to each other on the mounting plate 11 , and the rigid elastic cylinder 9 is installed horizontally between the two mounting lugs 13 .

The cylinder barrel of the telescopic cylinder 12 is fixedly arranged on the fixed mounting arm 8, and the fixed mounting arm 8 is vertically penetrated with a mounting hole, and the cylinder barrel of the telescopic cylinder 12 near one end of its piston rod is vertically fixed on the In the mounting hole, the fixed mounting arm 8 is also vertically penetrated with two guide holes, and the two guide holes are respectively located on both sides of the mounting hole, and the lower surface of the mounting plate 11 is also vertically Two guide rods 14 are provided, and the two guide rods 14 are respectively located on both sides of the piston rod of the telescopic cylinder 12, and the upper ends of the two guide rods 14 are fixedly connected with the lower surface of the mounting plate 11. One guide rod 14 corresponds to the two guide holes one by one, and the guide rod 14 is movably arranged in the corresponding guide holes.

One of the installation lugs 13 is vertically fixed on the upper surface of the installation plate 11 , and the other installation lug 13 is vertically fixed on the side of the installation plate 11 by bolts.

The rigid elastic cylinder 9 includes a cylinder body, a fixed shaft 2 and a number of elastic curved plates 3, the two ends of the cylinder body are open, the fixed shaft 2 is penetrated in the cylinder body, and the fixed shaft 2 and the The axis lines of the cylinder coincide, and the two ends of the fixed shaft 2 protrude horizontally from the two ends of the cylinder respectively; the elastic curved plates 3 are located in the cylinder, and all the elastic curved plates 3 are arranged on On the fixed shaft 2, all the elastic curved plates 3 are circumferentially distributed around the fixed shaft 2, and the elastic curved plates 3 are arranged to diverge outward around the fixed shaft 2;

The outer edge of the elastic curved plate 3 is fixedly connected with the inner wall of the cylinder, and the inner edge of the elastic curved plate 3 is fixedly connected with the fixed shaft 2 .

The cylinder body includes a first metal cylinder 4, a first rubber cylinder 5 and a composite cylinder 6 arranged sequentially from inside to outside, the outer wall of the first metal cylinder 4 is attached to the inner wall of the first rubber cylinder 5, The outer wall of the first rubber cylinder 5 is attached to the inner wall of the composite cylinder 6 ; the inner wall of the first metal cylinder 4 is fixedly connected with the outer edge of the elastic curved plate 3 .

The composite cylinder 6 includes a second metal cylinder 6a and two second rubber cylinders 6b, the two second rubber cylinders 6b are respectively arranged at both ends of the second metal cylinder 6a, and the second metal cylinder 6a Connected with the two second rubber cylinders 6b; the second metal cylinder 6a and the two second rubber cylinders 6b are fixedly sleeved on the first rubber cylinder 5, and the second metal cylinder 6a The inner wall is attached to the outer wall of the first rubber cylinder 5, the inner walls of the two second rubber cylinders 6b are all attached to the outer wall of the first rubber cylinder 5, and the two second rubber cylinders 6b are close to each other. The two ends of the first rubber cylinder 5; the outer walls of the second metal cylinder 6a and the two second rubber cylinders 6b are flush, and the first metal cylinder 4, the first rubber cylinder 5 and the The edges of both ends of the composite cylinder 6 are flush.

The elastic curved plate 3 includes a strip-shaped inner wall plate 3a, an elastic plate 3b and a strip-shaped outer wall plate 3c; the length direction of the strip-shaped inner wall plate 3a is parallel to the axis line of the fixed shaft 2, and the strip-shaped inner wall The width direction of the plate 3a is arranged along the diameter direction of the fixed shaft 2, and the inner side of the strip-shaped inner wall plate 3a is fixed on the outer wall of the fixed shaft 2;

The length direction of the strip-shaped outer wall plate 3c is parallel to the axis line of the cylinder body, the width direction of the strip-shaped outer wall plate 3c is arranged along the diameter direction of the cylinder body, and the outer strip-shaped wall plate 3c The sides are fixed on the inner wall of the first metal cylinder 4;

The strip-shaped inner wall plate 3a and the strip-shaped outer wall plate 3c are located in the same diameter direction, the elastic plate 3b is connected between the strip-shaped inner wall plate 3a and the strip-shaped outer wall plate 3c, and the elastic plate 3b The cross-section of the elastic plate 3b is "S"-shaped, one straight side of the elastic plate 3b is connected to the outer side of the strip-shaped inner wall plate 3a, and the other straight side of the elastic plate 3b is connected to the strip-shaped outer wall plate The inner edge of 3c is connected;

The elastic curved plate 3, the first metal cylinder 4 and the second metal cylinder 6a are made of 1-3 mm steel strip or copper foil.

The two mounting lugs 13 are respectively horizontally penetrated with pressure-bearing holes, and the two ends of the fixed shaft 2 correspond to the two pressure-bearing holes one by one, and the two ends of the fixed shaft 2 are respectively installed on the In the corresponding pressure-bearing hole, the axis of the cylinder is parallel to the centerline of the installation inner cylinder 31 .

In the second specific embodiment, the internal support device is a rolling-type internal support system, and the rolling-type internal support system includes a rigid elastic cylinder 9, a telescopic cylinder 12 and a limit device, and the rigid elastic cylinder 9 is installed On the limiting device, the limiting device is installed on the piston rod of the telescopic cylinder 12;

The limiting device includes a mounting plate 11 and two limiting roller groups, the mounting plate 11 is horizontally arranged on the upper end of the piston rod of the telescopic cylinder 12, and the two limiting roller groups are installed oppositely on the mounting plate. On the upper surface of the plate 11, the rigid elastic cylinder 9 is located between the two limiting roller groups.

One said limiting roller group comprises an extrusion limiting roller 18 and two installation seats 19, and two said installation seats 19 are all fixedly arranged on the upper surface of said mounting plate 11, and said extrusion limiting roller 18 It is horizontally arranged between the two mounting seats 19 of the same roller group, and the roller shafts at both ends of the extrusion limiting roller 18 are respectively mounted on the corresponding two mounting seats 19 through bearings;

The two squeeze limit rollers 18 are parallel to each other, the distance between the two squeeze limit rollers 18 is smaller than the diameter of the rigid elastic cylinder 9, and the rigid elastic cylinder 9 falls on the two squeeze limit rollers. On the positioning roller 18 , the axis line of the rigid elastic cylinder 9 is parallel to the extrusion limiting roller 18 .

All the mounting bases 19 are also provided with fixed roller shafts 20, the fixed roller shafts 20 are vertically arranged on the mounting bases 19, and the vertical movable sleeves on the fixed roller shafts 20 are provided with anti-deviation limit rollers cylinder 21, the upper end of the fixed roller shaft 20 protrudes from the upper end of the anti-deviation limit roller 21, the upper end of the fixed roller shaft 20 is provided with threads, and the upper end of the fixed roller shaft 20 is provided with an anti-loosening nut , the anti-loosening nut is threadedly connected with the fixed roller shaft 20 .

The telescopic cylinder 12 is arranged on the fixed mounting arm 8, and the fixed mounting arm 8 is vertically penetrated with a mounting hole, and the cylinder barrel near one end of the piston rod of the telescopic cylinder 12 is vertically fixed in the mounting hole Inside, there are two guide holes vertically penetrating through the fixed installation arm 8, and the two guide holes are respectively located on both sides of the installation hole, and the lower surface of the installation plate 11 is also vertically provided with two Guide rod 14, two described guide rods 14 are respectively positioned at the piston rod both sides of described telescopic cylinder 12, and the upper end of two described guide rods 14 is fixedly connected with the lower surface of described mounting plate 11, and two described guide rods The rods 14 correspond to the two guide holes one by one, and the guide rods 14 are movably arranged in the corresponding guide holes.

The rigid elastic cylinder 9 includes a cylinder body, a fixed shaft 2 and a number of elastic curved plates 3, the two ends of the cylinder body are open, the fixed shaft 2 is penetrated in the cylinder body, and the fixed shaft 2 and the The axis lines of the cylinder coincide;

The elastic curved plates 3 are located in the cylinder, all the elastic curved plates 3 are arranged on the fixed shaft 2, and all the elastic curved plates 3 are circumferentially distributed around the fixed shaft 2. The elastic curved plate 3 is arranged outwardly with the fixed shaft 2 as the center; the outer edge of the elastic curved plate 3 is fixedly connected with the inner wall of the cylinder body, and the inner edge of the elastic curved plate 3 is connected with the fixed shaft 2 fixed connections.

The mounting plate 11 is also vertically provided with two limit slide bars 15, the two limit slide bars 15 are arranged oppositely, and the two limit slide bars 15 are respectively close to the two ends of the fixed shaft 2. end, the two limit slide bars 15 are provided with limit adapters 16;

The limit adapter seat 16 includes a guide sleeve 16a and a bearing seat 16b, the bearing seat 16b is fixedly mounted on the guide sleeve 16a, and the guide sleeve 16a is movably sleeved on the limit slide bar 15, the two ends of the fixed shaft 2 protrude horizontally from the two ends of the cylinder respectively, and the two ends of the fixed shaft 2 are respectively mounted on the corresponding bearing housings 16b through bearings.

The cylinder body includes a first metal cylinder 4, a first rubber cylinder 5 and a composite cylinder 6 arranged sequentially from inside to outside, the outer wall of the first metal cylinder 4 is attached to the inner wall of the first rubber cylinder 5, The outer wall of the first rubber cylinder 5 is attached to the inner wall of the composite cylinder 6 ; the inner wall of the first metal cylinder 4 is fixedly connected with the outer edge of the elastic curved plate 3 .

The composite cylinder 6 includes a second metal cylinder 6a and two second rubber cylinders 6b, the two second rubber cylinders 6b are respectively arranged at both ends of the second metal cylinder 6a, and the second metal cylinder 6a Connected with the two second rubber cylinders 6b; the second metal cylinder 6a and the two second rubber cylinders 6b are fixedly sleeved on the first rubber cylinder 5, and the second metal cylinder 6a The inner wall is attached to the outer wall of the first rubber cylinder 5, the inner walls of the two second rubber cylinders 6b are all attached to the outer wall of the first rubber cylinder 5, and the two second rubber cylinders 6b are close to each other. The two ends of the first rubber cylinder 5; the outer walls of the second metal cylinder 6a and the two second rubber cylinders 6b are flush, and the first metal cylinder 4, the first rubber cylinder 5 and the The edges of both ends of the composite cylinder 6 are flush.

The elastic curved plate 3 includes a strip-shaped inner wall plate 3a, an elastic plate 3b and a strip-shaped outer wall plate 3c;

The length direction of the strip-shaped inner wall plate 3a is parallel to the axis of the fixed shaft 2, the width direction of the strip-shaped inner wall plate 3a is set along the diameter direction of the fixed shaft 2, and the strip-shaped inner wall plate 3a The inner side of the fixed axis is fixed on the outer wall of the fixed shaft 2;

The length direction of the strip-shaped outer wall plate 3c is parallel to the axis line of the cylinder body, the width direction of the strip-shaped outer wall plate 3c is arranged along the diameter direction of the cylinder body, and the outer strip-shaped wall plate 3c The sides are fixed on the inner wall of the first metal cylinder 4;

The strip-shaped inner wall plate 3a and the strip-shaped outer wall plate 3c are located in the same diameter direction, the elastic plate 3b is connected between the strip-shaped inner wall plate 3a and the strip-shaped outer wall plate 3c, and the elastic plate 3b The cross-section of the elastic plate 3b is "S"-shaped, one straight side of the elastic plate 3b is connected to the outer side of the strip-shaped inner wall plate 3a, and the other straight side of the elastic plate 3b is connected to the strip-shaped outer wall plate The inner edge of 3c is connected;

The material of the elastic curved plate 3, the first metal cylinder 4 and the second metal cylinder 6a is 1-3 mm steel strip or copper foil, and the axis line of the cylinder body and the installation inner cylinder 31 parallel to the centerline.

When in use: First, the two cylindrical workpieces to be welded are respectively clamped by two sets of clamping and rotating mechanisms. Specifically, the inner support mounting seat and the two sets of clamping and rotating mechanisms are slid outward on the workbench to move away from each other. Leave a space for placement, and then put the cylindrical workpiece to be welded into the corresponding clamping area, so that the centerline of the cylindrical workpiece to be welded coincides with the centerline of the inner cylinder 31, and then slide the two sets of clamps inward. Rotate the mechanism to a suitable position and lock it, so that the ends of the two cylindrical workpieces to be welded are pressed against each other, and the clamping cylinder 27 is synchronously protruded from the outside to clamp and fix the corresponding cylindrical workpiece to be welded. Whether the center of the cylindrical workpiece to be welded is in the rotation center of the clamping rotation mechanism can be quickly detected by the detection device body, and the deviation can be corrected in time. Slide the inner support mounting seat so that the inner support device enters into the cylindrical workpiece to be welded, lock the inner support mounting seat when the inner support device enters the seam of the cylindrical workpiece to be welded, and then move the piston rod of the telescopic cylinder 12 Stretch out, make the outer wall of rigid elastic cylinder 9 and the inwall of two to-be-welded cylindrical workpieces compress; Large support area; the rigid elastic cylinder 9 has strong recovery elastic potential energy after deformation. When the external pressure is not enough to make the rigid elastic cylinder 9 continue to deform, the rigid elastic cylinder 9 forms a rigid support, thereby providing a stable support surface; welding tools The stirring head 37 extends into the seam of the cylindrical workpieces to be welded from the outside, and finally the two cylindrical workpieces to be welded are rotated synchronously to realize the friction stir welding of the circumferential weld.

The technical points of this case are only the internal support device, the detection device, and the rotating clamping device. As for the welding tools used for friction stir welding, they are existing technologies, so this article will not repeat them. As for how to solve the sliding assembly and locking of the mounting base 28 and the inner support mounting seat, how to solve the synchronous clamping of the three clamping cylinders 27, and how to solve the problems of synchronous rotation of two groups of rotating clamping devices, etc., there are many problems in the prior art. Records are not the focus of this case, so there is no need to discuss them in detail.

Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the inspiration of the present invention, those skilled in the art can make various similar implementations without violating the purpose and claims of the present invention. It means that such transformations all fall within the protection scope of the present invention.

Claims (10)

1. the utility model provides an eccentric detection device of synchronous centre gripping of circular workpiece which characterized in that: the device comprises a detection device body and a clamping and rotating mechanism, wherein the detection device body is arranged on the clamping and rotating mechanism;

The clamping and rotating mechanism comprises an annular mounting seat (25), the annular mounting seat (25) is cylindrical, the central line of the annular mounting seat (25) is horizontally arranged, the inner cavity of the annular mounting seat (25) forms a clamping area, and the detection device body is arranged around the central line of the annular mounting seat (25);

The detection device body comprises a sliding part and a detection part, the sliding part is movably inserted into the cylinder wall of the annular mounting seat (25), the sliding direction of the sliding part is parallel to the central line of the annular mounting seat (25), the detection part is fixedly installed on the sliding part, and the detection part is provided with an alignment mark.

2. The synchronous clamping eccentricity detection device for the circular workpieces as claimed in claim 1, wherein: the sliding part comprises three sliding support rods (35), three sliding holes penetrate through the wall of the annular mounting seat (25), all the sliding holes surround the center line of the annular mounting seat (25) and are uniformly distributed, the hole center line direction of the sliding holes is parallel to the center line of the annular mounting seat (25), the sliding support rods (35) correspond to the sliding holes one by one, the sliding support rods (35) are movably arranged in the corresponding sliding holes in a penetrating mode, and two ends of each sliding support rod (35) extend out of the corresponding sliding holes respectively.

3. The device for detecting the synchronous clamping eccentricity of the circular workpiece as claimed in claim 2, wherein: the detection portion includes three detection branch (36), and is three detect branch (36) and follow respectively the radial setting of annular mount pad (25), it is three detect branch (36) with the central line hoop of annular mount pad (25) distributes, and is three detect the inner interconnect of branch (36), and is three the tie point of detecting branch (36) is located on the central line of annular mount pad (25), it is three detect branch (36) are located same one side of annular mount pad (25), three detect branch (36) and three slide branch (35) one-to-one, it is three the outer end of detecting branch (36) and the corresponding three slide branch (35) fixed connection, the free end of slide branch (35) is equipped with the stopping plush copper respectively.

4. The device for detecting the synchronous clamping eccentricity of the circular workpiece as claimed in claim 3, wherein: and scale marks are respectively arranged on the three detection supporting rods (36) along the respective length directions to form the alignment marks.

5. the device for detecting the synchronous clamping eccentricity of the circular workpiece as claimed in claim 3, wherein: the clamping and rotating mechanism further comprises an installation inner barrel (31), the annular installation seat (25) and the installation inner barrel (31) are concentrically arranged, and the installation inner barrel (31) is installed on the annular installation seat (25) through a connecting bearing (26).

6. The device for detecting the synchronous clamping eccentricity of the circular workpiece as claimed in claim 5, wherein: still be equipped with at least three die clamping cylinder (27) in the installation inner tube (31), all die clamping cylinder (27) surround the central line evenly distributed of installation inner tube (31), all die clamping cylinder (27)'s piston rod all faces the central line of installation inner tube (31).

7. The device for detecting the synchronous clamping eccentricity of the circular workpiece as claimed in claim 5, wherein: the outer wall of the mounting inner cylinder (31) is tightly abutted with the inner ring of the connecting bearing (26);

All the clamping cylinders (27) are uniformly arranged on the inner wall of the mounting inner cylinder (31), and piston rods of all the clamping cylinders (27) face to the central line of the mounting inner cylinder (31).

8. The device for detecting the synchronous clamping eccentricity of the circular workpiece as claimed in claim 5, wherein: the clamping and rotating mechanism further comprises a mounting base (28), the outer wall of the annular mounting seat (25) is fixed on the mounting base (28), and the central line of the annular mounting seat (25) is horizontally arranged;

The mounting base (28) is further provided with a driving device, the driving device comprises a speed reduction motor (29), a shell of the speed reduction motor (29) is fixedly mounted on the mounting base (28), an inner gear ring (30) is arranged in the connecting bearing (26), the outer edge of the inner gear ring (30) is tightly abutted to the inner wall of the connecting bearing (26), the center line of the inner gear ring (30) is overlapped with the center line of the mounting inner cylinder (31), the output shaft of the speed reduction motor (29) extends into the inner ring of the inner gear ring (30), the output shaft of the speed reduction motor (29) is provided with a driving gear, and the driving gear is meshed with the inner gear ring (30).

9. The device for detecting the synchronous clamping eccentricity of the circular workpiece as claimed in claim 6, wherein: the inner gear ring (30) is communicated with the mounting inner cylinder (31), a plurality of connecting rods (32) are inserted into the inner gear ring (30), all the connecting rods (32) are parallel to the central line of the inner gear ring (30), all the connecting rods (32) are uniformly arranged around the central line of the inner gear ring (30), and all the connecting rods (32) penetrate through the inner gear ring (30) and then extend into the cylinder wall of the mounting inner cylinder (31).

10. the device for detecting the synchronous clamping eccentricity of the circular workpiece as claimed in claim 2, wherein: and an arc-shaped slip is arranged on the output end of the clamping cylinder (27).