A fast indexing and positioning mechanism

Abstract

The present application discloses a rapid indexing and positioning mechanism, which relates to the technical field of mechanical equipment, including a body, a laser head, a mandrel, a dividing center, a chuck mechanism, a positioning assembly, a driving assembly and a centering support mechanism; the mandrel is positioned between the positioning assembly and the dividing center, and the mandrel can be divided into a clamping section, a first supporting section, a positioning shoulder, a workpiece mounting section, a second supporting section and a supporting portion; the workpiece mounting section is a hollow structure, which is used to sleeve the interior of a long cylindrical workpiece and fix and support it; the supporting portion is fixed inside the workpiece mounting section, and the supporting portion has a circumferentially arranged support plate, which is slidably connected inside the workpiece mounting section in a detachable manner, and is used to support the inner wall of the long cylindrical workpiece and fix its position; it can achieve the technical effect of diverse mandrel structure sizes, increased application range, improved stability during processing and is conducive to mechanical automation processing.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical equipment, and in particular to a rapid indexing and positioning mechanism. Background Art

[0002] During the machining process, the workpiece needs to be positioned according to specific position, angle or size requirements to ensure that the machined parts meet the design requirements. The indexing positioning mechanism is a device used to accurately control the position and angle of a mechanical device or tool. It is usually used in equipment or processes that require precise positioning and control of rotation or linear movement.

[0003] For the indexing and positioning of workpieces, the Chinese invention patent with patent number CN113385836B discloses a long cylindrical workpiece indexing and positioning fixture, including a chuck mechanism, a positioning assembly, and a horizontally arranged indexing top, a mandrel and a tail top. The chuck mechanism includes a first clamping part, a second clamping part and a transmission structure; the tip of the indexing top is adapted to be connected with one end of the mandrel, and the tip of the tail top is adapted to be connected with the other end of the mandrel. The mandrel is coaxially arranged with the long cylindrical workpiece and can pass through the inner cavity of the long cylindrical workpiece. The invention, through the cooperation between the indexing top and the tail top, the indexing top and the tail top respectively support one end of the mandrel, which greatly reduces the positioning deviation of the mandrel. The mandrel, the indexing top and the tail top are in the same coaxiality, and the axial positioning of the mandrel and the workpiece is more accurately achieved, ensuring the accuracy of the laser processing position.

[0004] Although the above scheme is relatively convenient to operate, it can realize the axial positioning of the core shaft and the workpiece and ensure accurate positioning, which improves the processing efficiency to a certain extent; however, the structural size of the positioning core shaft of the invention is too single, and it is impossible to perform graduation positioning according to long cylindrical workpieces with different inner diameters. The scope of application is relatively low, and it cannot support the inner wall of the cylindrical workpiece mounted on its outside. The stability during processing is poor, and the cylindrical workpiece may be damaged during processing due to inappropriate size, causing local deformation of the workpiece, thereby affecting the positioning accuracy and processing precision, which is not conducive to mechanical automation processing. Summary of the invention

[0005] The present application solves the technical problems in the prior art that the core shaft structure size is single, the application range is small, the stability during processing is poor and it is not conducive to mechanical automation processing by providing a rapid indexing and positioning mechanism. The present application achieves the technical effects of diversified core shaft structure size, increased application range, improved stability during processing and conducive to mechanical automation processing.

[0006] The present application provides a rapid indexing and positioning mechanism, comprising a body, a laser head for laser cutting a long cylindrical workpiece, a mandrel for supporting and fixing the long cylindrical workpiece, an indexing top for tightening and positioning the mandrel, a chuck mechanism for clamping the indexing top and the mandrel, a positioning assembly for fixing the long cylindrical workpiece on the mandrel, a driving assembly for driving the indexing top to rotate, and a centering support mechanism for supporting and adjusting the height of the axis of the mandrel;

[0007] The mandrel is positioned between the positioning assembly and the indexing top, and the mandrel can be divided into a clamping section, a first supporting section, a positioning shoulder, a workpiece mounting section, a second supporting section and a supporting portion;

[0008] The workpiece mounting section is a hollow structure, which is used to fit inside the long cylindrical workpiece and fix and support it;

[0009] The support portion is fixed inside the workpiece mounting section. The support portion has a circumferentially arranged support plate, which is slidably connected inside the workpiece mounting section in a detachable manner and is used to support the inner wall of the long cylindrical workpiece and fix its position.

[0010] Furthermore, the support portion includes an insert rod and multiple groups of support components, the multiple groups of support components are evenly arranged along the circumference of the workpiece installation section, and each of the support components includes a connecting spring, a connecting plate, and a support plate;

[0011] The insert rod is detachably connected to the inside of the left end of the workpiece mounting section, and is used to push the support assembly to extend radially along the core shaft and support the long cylindrical workpiece sleeved on the outside thereof;

[0012] The connecting springs are provided in plurality and are evenly fixed on the inner wall of the workpiece mounting section and are located radially outside the insertion rod, and are used to connect the workpiece mounting section and the connecting plate;

[0013] The connecting plate is a T-shaped structure, the number of which corresponds to the connecting springs, and is fixed inside the workpiece mounting section through the connecting springs and is located radially outside the insertion rod;

[0014] The support plate is fixed on one end of each connecting plate away from the insertion rod and is slidably connected inside the workpiece mounting section, and is used to squeeze the connecting plate after the insertion rod is inserted, so that the connecting plate drives the support plate to extend outward along the radial direction of the workpiece mounting section to support the long cylindrical workpiece.

[0015] Furthermore, the cross-section of the vertically placed support plate is an arc-shaped structure and a rubber cushion is provided on the side in contact with the long cylindrical workpiece to fit the arc-shaped inner wall of the long cylindrical workpiece.

[0016] Furthermore, a surface of the connecting plate close to the insertion rod is an arc-shaped structure and a guiding inclined surface is provided on a surface in contact with the insertion rod.

[0017] Furthermore, the cross-section of the horizontally placed insertion rod is one of a rectangle and an isosceles trapezoid, and the left end of the insertion rod is connected to the left end of the workpiece mounting section by a threaded connection.

[0018] Furthermore, a plurality of airbags of equal length are evenly fixed on the outer side of the workpiece mounting section along its circumference, the airbags are connected to the air pump through pipelines, and the airbags and the support plates are staggered to further support the inner wall of the long cylindrical workpiece.

[0019] Furthermore, the cross section of the airbag when placed vertically is an arc-shaped strip, and the cross section in the vertical direction when fully expanded is a fan-shaped.

[0020] Furthermore, the outer surface of the airbag is provided with criss-cross anti-skid patterns to increase the friction with the inner wall of the long cylindrical workpiece and ensure the fixed position.

[0021] Furthermore, the airbag includes a plurality of small airbags, the plurality of small airbags are connected to each other and the heights of the small airbags expanded in the vertical direction gradually increase from right to left.

[0022] Furthermore, the volume of the airbag after being fully expanded is 1.5-3 times the original volume.

[0023] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0024] By optimizing and improving the structure of the core shaft in the prior art, and through the interaction of the inserted rod, the support plate and the connecting spring, the support plate in the core shaft can be extended outward, thereby supporting the cylindrical workpiece sleeved on the outside thereof, and can also meet the sleeve positioning of cylindrical workpieces of different sizes, effectively solving the technical problems in the prior art that the core shaft structure has a single size, a low scope of application, poor stability during processing and is not conducive to mechanical automation processing, and achieving the technical effect of diverse core shaft structure types, increased scope of application, improved stability during processing and conducive to mechanical automation processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The figure is a schematic diagram of the overall structure of a rapid indexing and positioning mechanism of the present invention during processing operation.

[0026] Figure 2 The figure is a three-dimensional structural schematic diagram of a core shaft of a rapid indexing and positioning mechanism of the present invention.

[0027] Figure 3 This is a full cross-sectional view taken along the AA line of a rapid indexing and positioning mechanism of the present invention.

[0028] Figure 4 The present invention is a schematic diagram of the three-dimensional structure of a rapid indexing and positioning mechanism after a cylindrical long tube-shaped workpiece is sleeved.

[0029] Figure 5 The present invention is a full cross-sectional view of a rapid indexing and positioning mechanism after a cylindrical long tube-shaped workpiece is sleeved thereon.

[0030] Figure 6 The figure is a schematic diagram of the three-dimensional structure of a rapid indexing and positioning mechanism of the present invention after a conical long cylindrical workpiece is sleeved.

[0031] Figure 7 The full cross-sectional view of a rapid indexing and positioning mechanism of the present invention after a conical long cylindrical workpiece is sleeved thereon.

[0032] Figure 8 It is a schematic diagram of a rapid indexing and positioning mechanism of the present invention when an airbag is inflated in a state where a cylindrical long tube-shaped workpiece with the same inner diameter at both ends is sleeved.

[0033] Fig. 9 It is a schematic diagram of a rapid indexing and positioning mechanism of the present invention when an airbag is inflated in a state where a conical long cylindrical workpiece with different inner diameters at both ends is sleeved.

[0034] In the figure: 100, vehicle body; 200, laser head; 300, mandrel; 310, clamping section; 320, first supporting section; 330, positioning shoulder; 340, workpiece mounting section; 341, airbag; 350, second supporting section; 361, plug rod; 362, connecting spring; 363, connecting plate; 364, support plate; 400, dividing center; 500, chuck mechanism; 600, positioning assembly; 700, drive assembly; 800, centering support mechanism. DETAILED DESCRIPTION

[0035] To facilitate the understanding of the present invention, the present application will be described more comprehensively below with reference to the relevant drawings; the drawings show preferred embodiments of the present invention, but the present invention can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, the purpose of providing these embodiments is to enable a more thorough and comprehensive understanding of the disclosed content of the present invention.

[0036] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are only for illustrative purposes and do not represent the only implementation method.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs; the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0038] See also Figure 1 , which is a schematic diagram of the overall structure of a rapid indexing and positioning mechanism of the present invention; the present application optimizes and improves the structure of the core shaft 300 in the prior art, and through the interaction of the insertion rod 361, the support plate 364 and the connecting spring 362, the support plate 364 in the core shaft 300 can extend outward, thereby supporting the cylindrical workpiece sleeved on the outside thereof, and can also meet the sleeve positioning of long cylindrical workpieces with different inner diameters, thereby achieving the technical effect of diversified structural dimensions of the core shaft 300, improved scope of application, improved stability during processing, and conducive to mechanical automation processing.

[0039] Embodiment 1: Figure 1 As shown, the present application discloses a rapid indexing and positioning mechanism, comprising a body 100, a laser head 200 for laser cutting a long cylindrical workpiece, a mandrel 300 for supporting and fixing the long cylindrical workpiece, an indexing top 400 for tightening and positioning the mandrel 300, a chuck mechanism 500 for clamping the indexing top 400 and the mandrel 300, a positioning assembly 600 for fixing the long cylindrical workpiece on the mandrel 300, a driving assembly 700 for driving the indexing top 400 to rotate, and a centering support mechanism 800 for supporting and adjusting the height of the axis of the mandrel 300;

[0040] The mandrel 300 is positioned between the positioning assembly 600 and the indexing top 400. The mandrel 300 can be divided into a clamping section 310, a first supporting section 320, a positioning shoulder 330, a workpiece mounting section 340, a second supporting section 350 and a supporting portion.

[0041] The workpiece mounting section 340 is a hollow structure, which is used to fit inside a long cylindrical workpiece and fix and support it;

[0042] The support portion is fixed inside the workpiece mounting section 340 , and the support portion has a circumferentially arranged support plate 364 , which is slidably connected inside the workpiece mounting section 340 in a detachable manner, and is used to support the inner wall of the long cylindrical workpiece and fix its position.

[0043] like Figure 2 and Figure 3 As shown, the support portion includes an insert rod 361 and multiple groups of support components, and the multiple groups of support components are evenly arranged along the circumference of the workpiece mounting section 340, and each of the support components includes a connecting spring 362, a connecting plate 363, and a support plate 364;

[0044] The insert rod 361 is detachably connected to the left end of the workpiece mounting section 340, and is used to push the support assembly to extend radially along the core shaft 300 and support the long cylindrical workpiece sleeved on the outside thereof;

[0045] A plurality of connecting springs 362 are provided, uniformly fixed on the inner wall of the workpiece mounting section 340 and located radially outside the insertion rod 361, and are used to connect the workpiece mounting section 340 and the connecting plate 363;

[0046] The connecting plate 363 is a T-shaped structure, and the number thereof corresponds to the connecting springs 362 . The connecting plate 363 is fixed inside the workpiece mounting section 340 through the connecting springs 362 and is located radially outside the insert rod 361 .

[0047] The support plate 364 is fixed to one end of each connecting plate 363 away from the insertion rod 361 and is slidably connected inside the workpiece mounting section 340, and is used to squeeze the connecting plate 363 after the insertion rod 361 is inserted, so that the connecting plate 363 drives the support plate 364 to extend outward in the radial direction of the workpiece mounting section 340 to support the long cylindrical workpiece.

[0048] By manually replacing the insertion rods 361 of different sizes according to the long cylindrical workpieces of different radial sizes, the extended support plate 364 can be extended to different distances, so that it can better adapt to the positioning of long cylindrical workpieces with different inner diameters, and play a supporting role for the long cylindrical workpiece sleeved on the outside thereof, so that the present invention can meet the sleeve positioning of cylindrical workpieces with different radial sizes, avoid damage to the cylindrical workpiece during operation due to inappropriate size, causing deformation, and at the same time improve the stability and scope of application of the present invention.

[0049] Furthermore, in order to ensure the stability of the device during indexing and positioning, Figure 3 As shown, preferably, the cross-section of the vertically placed support plate 364 is an arc-shaped structure and the side in contact with the long cylindrical workpiece is provided with a rubber pad for fitting the arc-shaped inner wall of the long cylindrical workpiece; in order to improve the convenience of inserting the insertion rod 361 into the workpiece mounting section 340, preferably, the side of the connecting plate 363 close to the insertion rod 361 is an arc-shaped structure and the side in contact with the insertion rod 361 is provided with a guide slope.

[0050] The laser head 200, the indexing center 400, the chuck mechanism 500, the positioning assembly 600 and the centering support mechanism 800 are all indispensable mechanisms in the process of indexing and positioning the cylindrical workpiece, and are all existing technologies, and will not be described in detail here.

[0051] When the embodiment of the present application is actually used: first, before processing, a suitable insertion rod 361 is selected according to the inner diameter size of the long cylindrical workpiece, and the insertion rod 361 is fixed inside the workpiece mounting section 340 by manual operation. At this time, the connecting plate 363 is moved in the direction away from the insertion rod 361, and the connecting spring 362 is compressed. Under the action of the connecting plate 363, the support plate 364 extends outward along the radial direction of the workpiece mounting section 340 and supports the inner wall of the long cylindrical workpiece, so that the long cylindrical workpiece is sleeved on the outside of the workpiece mounting section 340. Then, the staff rotates the positioning assembly 600 and pushes the long cylindrical workpiece toward the positioning shaft shoulder 330, so that the positioning assembly 600 presses the long cylindrical workpiece onto the positioning shaft shoulder 330 Axial and circumferential positioning of the long cylindrical workpiece is achieved; secondly, the first supporting section 320 and the second supporting section 350 of the core shaft 300 are placed on the corresponding centering support mechanism 800, and the core shaft 300 is lifted to the same height by the centering support mechanism 800, and then the tip of the dividing tip 400 is adapted to be connected with the end of the core shaft 300, and the circumferential and axial positioning of the core shaft 300 is completed; finally, when the dividing tip 400 is rotated by a certain angle to drive the core shaft 300 to rotate synchronously around the axis of the core shaft 300, the long cylindrical workpiece completes the indexing rotation, and the laser head 200 can vertically perform local laser cutting on the long cylindrical workpiece, and so on, the laser cutting of the entire circumferential outer surface of the long cylindrical workpiece is completed.

[0052] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0053] By optimizing and improving the structure of the core shaft 300 in the prior art, and through the interaction of the insert rod 361, the support plate 364 and the connecting spring 362, the support plate 364 in the core shaft 300 can extend outward, thereby supporting the cylindrical workpiece sleeved on the outside thereof, and can also meet the sleeve positioning of cylindrical workpieces with different inner diameters, effectively solving the technical problems in the prior art that the core shaft 300 has a single structural size, a low scope of application, poor stability during processing and is not conducive to mechanical automation processing, and achieving the technical effect that the core shaft 300 has diverse structural types, an increased scope of application, improved stability during processing and is conducive to mechanical automation processing.

[0054] Embodiment 2: In order to further expand the scope of application of the present application, the present application proposes the following technical solutions to the above technical problems, and optimizes and improves the structure of the insertion rod 361 to improve the applicability of the present application, specifically:

[0055] like Figure 4-Figure 7 As shown, the types of the insertion rod 361 include a round rod structure and a conical rod structure, and its horizontal cross-section is one of a rectangle and an isosceles trapezoid. The left end of the insertion rod 361 is connected to the left end of the workpiece mounting section 340 by a threaded connection.

[0056] The types of the insert rod 361 include a cylindrical structure and a conical structure. The radial dimensions of the insert rod 361 of the cylindrical structure and the conical structure are optional and replaceable. After inserting the conical insert rod 361, the support plates 364 at different positions can extend out of the surface of the core shaft 300 at different distances, forming a vertical conical section with different radial dimensions at the left and right ends, so that it can better fit long cylindrical workpieces of different sizes or long cylindrical workpieces with different inner diameters at both ends, further expanding the scope of application of the present invention, improving applicability, and facilitating daily mechanical processing and manufacturing.

[0057] Embodiment 3: Considering that the evenly arranged support plates 364 have limited inner wall support area for the long cylindrical workpiece, it is impossible to provide all-round support. In addition, during the processing, the device may vibrate due to excessive processing power of the processing equipment, causing the indexing and positioning position of the long cylindrical workpiece to shift, resulting in inaccurate positioning processing. Therefore, in order to expand the support range and improve the vibration reduction effect, the following technical solutions are proposed for the above technical problems, specifically:

[0058] like Figure 8 and Fig. 9 As shown, a plurality of airbags 341 of equal length are evenly fixed on the outer side of the workpiece mounting section 340 along its circumference, the airbags 341 are connected to the air pump through pipes, and the airbags 341 and the support plates 364 are arranged alternately to further support the inner wall of the long cylindrical workpiece.

[0059] The cross section of the airbag 341 when placed vertically is in the shape of an arc strip, and the cross section in the vertical direction when fully expanded is in the shape of a fan.

[0060] The outer surface of the airbag 341 is provided with criss-cross anti-skid patterns to increase the friction with the inner wall of the long cylindrical workpiece and ensure the fixed position.

[0061] The airbag 341 is made of silicone rubber, which is resistant to high temperatures and has excellent flexibility and corrosion resistance. Therefore, during the indexing rotation and positioning process, due to the centrifugal force and extrusion force generated by the rotation, the airbag 341 can support the inner wall of the cylindrical workpiece mounted on its outside. At the same time, due to the flexibility of the airbag 341, the stability of the workpiece during processing can be improved and a buffering and shock-absorbing effect can be achieved, further improving the processing efficiency.

[0062] Embodiment 4: In order to further improve the vibration reduction effect and better fit the inner wall of the long cylindrical workpiece, and improve the positioning and processing efficiency, the present application proposes the following technical solutions for the above technical problems, specifically:

[0063] like Figure 8 and Fig. 9As shown, the airbag 341 includes a plurality of small airbags 341 , which are connected to each other and the heights of the small airbags 341 from right to left gradually increase in the vertical direction.

[0064] The volume of the airbag 341 after being fully expanded is 1.5-3 times the original volume.

[0065] By connecting the small airbags 341 and filling the small airbags 341 at different positions with different amounts of gas, different expansion amounts are generated, which can better adapt to the long cylindrical workpieces with different inner diameters at both ends and support and reduce vibration, thereby improving the stability of the indexing rotation process. At the same time, the outer surface of the airbag 341 is provided with criss-cross anti-skid patterns, so when rotating or operating, it can increase the friction with the inner wall of the long cylindrical workpiece, improve the axial and circumferential positioning accuracy of the long cylindrical workpiece, and further prevent deviation.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A rapid indexing and positioning mechanism, comprising a body (100), a laser head (200) for laser cutting a long cylindrical workpiece, a mandrel (300) for supporting and fixing the long cylindrical workpiece, an indexing top (400) for tightening and positioning the mandrel (300), a chuck mechanism (500) for clamping the indexing top (400) and the mandrel (300), a positioning assembly (600) for fixing the long cylindrical workpiece on the mandrel (300), a driving assembly (700) for driving the indexing top (400) to rotate, and a centering support mechanism (800) for supporting and adjusting the height of the axis of the mandrel (300), characterized in that: The mandrel (300) is positioned between the positioning assembly (600) and the indexing top (400), and the mandrel (300) can be divided into a clamping section (310), a first supporting section (320), a positioning shoulder (330), a workpiece mounting section (340), a second supporting section (350) and a supporting portion; The workpiece mounting section (340) is a hollow structure, used to fit inside a long cylindrical workpiece and to fix and support it; The support portion is fixed inside the workpiece mounting section (340), and the support portion has a circumferentially arranged support plate (364), which is slidably connected inside the workpiece mounting section (340) in a detachable manner, and is used to support the inner wall of the long cylindrical workpiece and fix its position; The support portion comprises an insert rod (361) and a plurality of groups of support components, the plurality of groups of support components are evenly arranged along the circumference of the workpiece mounting section (340), and each of the support components comprises a connecting spring (362), a connecting plate (363), and a support plate (364); The insert rod (361) is detachably connected to the inside of the left end of the workpiece mounting section (340) and is used to push the support assembly to extend radially along the core shaft (300) and support the long cylindrical workpiece sleeved on the outside thereof; The connecting springs (362) are provided in plurality and are evenly fixed on the inner wall of the workpiece mounting section (340) and are located radially outside the insertion rod (361), and are used to connect the workpiece mounting section (340) and the connecting plate (363); The connecting plates (363) are T-shaped structures, the number of which corresponds to the connecting springs (362), and are fixed inside the workpiece mounting section (340) through the connecting springs (362) and are located radially outside the insertion rod (361); The support plate (364) is fixed to one end of each connecting plate (363) away from the insertion rod (361) and is slidably connected inside the workpiece mounting section (340) and is used to squeeze the connecting plate (363) after the insertion rod (361) is inserted, so that the connecting plate (363) drives the support plate (364) to extend outward in the radial direction of the workpiece mounting section (340) to support the long cylindrical workpiece; The cross-section of the horizontally placed insertion rod (361) is one of a rectangle and an isosceles trapezoid, and the left end of the insertion rod (361) is connected to the left end of the workpiece mounting section (340) by means of a threaded connection; A plurality of air bags (341) of equal length are evenly fixed to the outside of the workpiece mounting section (340) along its circumference, the air bags (341) are connected to the air pump through a pipeline, and the air bags (341) and the support plates (364) are arranged alternately to further support the inner wall of the long cylindrical workpiece; The airbag (341) includes a plurality of small airbags (341), the plurality of small airbags (341) are connected to each other, and the heights of the small airbags (341) when expanded in the vertical direction gradually increase from right to left.

2. A rapid indexing and positioning mechanism as claimed in claim 1, characterized in that: The cross section of the vertically placed support plate (364) is an arc-shaped structure and a rubber cushion is provided on the side in contact with the long cylindrical workpiece, so as to fit the arc-shaped inner wall of the long cylindrical workpiece.

3. A rapid indexing and positioning mechanism as claimed in claim 1, characterized in that: The side of the connecting plate (363) close to the insertion rod (361) is an arc-shaped structure, and the side in contact with the insertion rod (361) is provided with a guiding inclined surface.

4. A rapid indexing and positioning mechanism as claimed in claim 1, characterized in that: The cross section of the airbag (341) when placed vertically is in the shape of an arc strip, and the cross section in the vertical direction when fully expanded is in the shape of a fan.

5. A rapid indexing and positioning mechanism as claimed in claim 4, characterized in that: The outer surface of the airbag (341) is provided with crisscross anti-skid patterns to increase the friction with the inner wall of the long cylindrical workpiece and ensure the fixed position.

6. A rapid indexing and positioning mechanism as claimed in claim 5, characterized in that: The volume of the airbag (341) after being fully expanded is 1.5-3 times the original volume.

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