A thin-walled cylinder rounding mechanism

Abstract

The present invention provides a circular supporting mechanism for a thin-walled cylinder body, which includes a mounting base, a mounting frame, a supporting device and a pre-positioning device; the mounting frame is arranged on the mounting base and is in sliding fit with it, and a connecting device for fixedly connecting the two is arranged between the mounting base and the mounting frame; the supporting device includes a profile block for supporting the inner wall of the thin-walled cylinder body and a driving member for driving the profile block to approach or move away from the inner wall of the thin-walled cylinder body, and multiple groups of the supporting devices are detachably and fixedly arranged at intervals on the periphery of the mounting frame; the pre-positioning device is used for mounting the parts to be processed, and multiple groups of the pre-positioning devices are detachably and fixedly arranged at intervals on the periphery of the mounting frame. Multiple profile blocks are attached to the inner surface of the cylinder body and support it, thereby realizing multi-point circular support of the thin-walled cylinder by the circular supporting mechanism, which helps to reduce the fitting gap between two parts to be processed and is convenient for installation.

Description

Technical Field

[0001] The invention relates to the technical field of clamping, and in particular to a thin-walled cylinder rounding mechanism. Background Art

[0002] In the aerospace industry and other fields, thin-walled long cylindrical parts are widely used, and thin-walled long cylindrical parts are often processed using laser welding technology, which requires high precision of welded parts. It is difficult to ensure the size of thin-walled long cylindrical workpieces.

[0003] At present, in the welding process of thin-walled long cylindrical parts, the two parts to be welded are often tightly pressed by an internal support tooling to ensure that the gap between the two parts to be welded meets the accuracy requirements of the laser welding operation. Some existing thin-walled long cylindrical parts used in the aerospace field are equipped with rudder rails inside.

[0004] The existing Chinese patent with publication number CN203679892U discloses a thin-walled cylindrical fan-shaped inner support turning fixture, including a main shaft, a spacer, a flange sleeve, a duplex gear, a clamp body, a small bevel gear, a screw shaft, a fan-shaped support block, a worm, and a worm wheel. One end of the main shaft is installed on the lathe chuck, and the other end is installed with a spacer; the spacer is divided into an inner spacer and an outer spacer, the inner spacer is fixed on the main shaft, and the outer spacer is installed in cooperation with the flange sleeve; the duplex gear is installed in the flange sleeve and connected with the small bevel gear; the clamp body is connected and fixed with the flange sleeve; the fan-shaped support block is circular with the outer circle of the clamped thin-walled cylinder, and is installed on the clamp body through the positioning bolt passing through the pin hole of the fan-shaped support block.

[0005] The inventor believes that the internal support device in the prior art is inconvenient to install and it is difficult to ensure that the fitting gap between two parts to be processed meets the welding requirements. Summary of the invention

[0006] In view of the defects in the prior art, the object of the present invention is to provide a thin-walled cylinder rounding mechanism.

[0007] A thin-walled cylinder rounding mechanism provided by the present invention comprises a mounting base, a mounting frame, a supporting device and a pre-positioning device; the mounting frame is arranged on the mounting base and slidably cooperates with the mounting base, and a connecting device for fixedly connecting the mounting base and the mounting frame is arranged between the mounting base and the mounting frame; the supporting device comprises a profile block for supporting the inner wall of the thin-walled cylinder, a driving member for driving the profile block to approach or move away from the inner wall of the thin-walled cylinder, and the supporting device is detachably fixed in multiple groups at intervals around the mounting frame; the pre-positioning device is used to install parts to be processed, and the pre-positioning device is detachably fixed in multiple groups at intervals around the mounting frame.

[0008] Preferably, the pre-positioning device includes a mounting seat, a claw and an elastic member. The mounting seat can be detachably fixed on the mounting frame. Two claws are installed on the mounting seat. Both claws are slidably matched with the mounting seat. The elastic member is used to drive the two claws to close, and the elastic member is arranged in the mounting seat.

[0009] Preferably, an end of the clamping claw away from the mounting seat is provided with an outward push surface and a non-return surface, the outward push surface is used to guide the clamped part to escape from the clamping claw, and the non-return surface is used to prevent the part from entering between the two clamping claws.

[0010] Preferably, the elastic member comprises a spring.

[0011] Preferably, the connecting assembly comprises a connecting block and a locking block, wherein one locking block is respectively installed on two opposite sides of the connecting block, one of the locking blocks is fixedly connected to the mounting frame, and a fixing assembly is connected between the other locking block and the mounting base.

[0012] Preferably, a mounting groove is provided on the mounting base, and the fixing assembly includes a fixing bolt and a fixing nut, the bolt cap of the fixing bolt is embedded in the mounting groove, and the fixing bolt is slidingly matched with the mounting groove, the fixing bolt thread passes through a locking block, the fixing nut thread is matched with the threaded end of the fixing bolt passing through the locking block, and the fixing nut is tightened on the locking block.

[0013] Preferably, the driving member comprises a cylinder, a piston rod of the cylinder is fixedly connected to the profile block, and the extension and retraction direction of the cylinder piston rod is the same as the direction in which the profile block approaches or moves away from the inner wall of the thin-walled cylinder.

[0014] Preferably, a receiving groove is formed on a side of the profile block facing away from the driving member.

[0015] Preferably, a roller is rotatably mounted on the mounting frame, a plurality of rollers are spaced apart around the mounting frame, and the movement direction of the rollers is the same as the sliding direction of the mounting frame.

[0016] Preferably, the roller, the supporting device and the pre-positioning device are arranged correspondingly.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention supports the mounting frame through the mounting base, and mounts the thin-walled cylinder to be processed on the mounting frame by adjusting the position of the mounting frame on the mounting base and a plurality of pre-positioning devices arranged on the periphery of the mounting frame. Then, a plurality of driving members are started to drive a plurality of profile blocks on the periphery of the mounting frame to move towards the inner wall of the thin-walled cylinder until the profile blocks are attached to the inner surface of the cylinder, thereby realizing multi-point circular support, which helps to reduce the fitting gap between two parts to be processed and is convenient for installation.

[0019] 2. The present invention keeps the two jaws closed in the normal state through the spring, and with the guiding action of the outer pushing surface and the check surface, the rudder rail clamped by the jaws can smoothly escape from the jaws, which helps to improve the convenience of installing the thin-walled cylinder and the machining accuracy of the thin-walled cylinder.

[0020] 3. The present invention gently pushes the circular support mechanism into the thin-walled cylinder through the roller installation, which helps to reduce the friction between the circular support mechanism and the inner wall of the thin-walled cylinder, and thus helps to improve the convenience of installing the circular support mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of the non-limiting embodiments with reference to the following drawings:

[0022] Figure 1 It is a schematic diagram mainly showing the overall structure of the circular support mechanism of the present invention;

[0023] Figure 2 It is a schematic diagram mainly showing the overall structure of the pre-positioning device of the present invention;

[0024] Figure 3 It is a schematic diagram mainly showing the overall structure of the connecting device of the present invention.

[0025] Reference numerals: 1, mounting base; 11, mounting groove; 2, mounting frame; 21, weight reduction hole; 22, roller seat; 3, support device; 31, profile block; 311, receiving groove; 32, cylinder; 4, pre-positioning device; 41, mounting seat; 42, jaw; 421, outer pushing surface; 422, check surface; 43, spring; 5, roller; 6, connecting device; 61, connecting block; 62, locking block; 7, fixing component; 71, fixing bolt; 72, fixing nut. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The present invention will be described in detail below with reference to specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those of ordinary skill in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0027] As Figure 1 shown, a thin-wall cylinder circular supporting mechanism provided according to the present invention includes a mounting base 1, a mounting frame 2, a supporting device 3, a pre-positioning device 4, and rollers 5. The supporting device 3, the pre-positioning device 4, and the rollers 5 are arranged in correspondence, and the supporting device 3, the pre-positioning device 4, and the rollers 5 are all mounted on the mounting frame 2. The mounting frame 2 is mounted on the mounting base 1 and is in sliding fit therewith.

[0028] As Figure 1 shown, the mounting base 1 is a metal rod with a rectangular cross-section, and the mounting base 1 is made of a large-size aluminum alloy profile, which has good rigidity and high straightness and is convenient for installation. The mounting frame 2 is in the shape of a rectangular plate and is finely processed from high-strength aluminum alloy, having good rigidity, and a plurality of weight-reducing holes 21 are provided on the mounting frame 2, thereby reducing the self-weight of the circular supporting mechanism and reducing the deformation of the workpiece to be machined caused by the self-weight of the circular supporting mechanism. The mounting frame 2 is coaxially sleeved on the mounting base 1, the mounting frame 2 is in sliding fit with the mounting base 1, and a connecting device 6 for fixing the two is connected between the mounting frame 2 and the mounting base 1.

[0029] As Figure 1 and Figure 2 shown, mounting grooves 11 are provided on the mounting base 1, the length of the mounting grooves 11 is parallel to the length of the mounting base 1, the cross-section of the mounting grooves 11 is trapezoidal, and three mounting grooves 11 are equally spaced on any side surface of the mounting base 1. The connecting device 6 includes a connecting block 61, a locking block 62, and a fixing component 7. One locking block 62 is fixedly mounted on each of the two opposite sides of the connecting block 61. One of the locking blocks 62 is fixedly mounted on the mounting frame 2 by the cooperation of bolts and nuts, and the other locking block 62 is mounted on the mounting base 1 by the fixing component 7.

[0030] As Figure 1 and Figure 3 shown, the fixing component 7 includes a fixing bolt 71 and a fixing nut 72. The cap of the fixing bolt 71 is embedded in the mounting groove 11, the fixing bolt 71 is in sliding fit with the mounting groove 11, and the fixing bolt 71 passes through the locking block 62. The fixing nut 72 is threadedly engaged with the threaded end of the fixing bolt 71 passing through the locking block 62, and the fixing nut 72 abuts against the locking block 62. Four groups of fixing components 7 are symmetrically mounted between the locking block 62 and the mounting base 1, and one group of connecting devices 6 is mounted around the connection between the mounting base 1 and the mounting frame 2.

[0031] By first loosening all the fixing nuts 72, then sliding the mounting frame 2 on the mounting base 1 along the length direction of the mounting base 1 to a suitable position, and then tightening the fixing nuts 72 to fixedly connect the mounting frame 2 and the mounting base 1, the position adjustment of the mounting frame 2 on the mounting base 1 is realized.

[0032] The supporting device 3 includes a driving member and a profile block 31. The driving member is a cylinder 32. The cylinder block of the cylinder 32 is detachably fixed to the mounting frame 2 by bolts. The profile block 31 is mounted on the extending end of the telescopic rod of the cylinder 32 by bolts. A receiving groove 311 is formed on the side of the profile block 31 facing away from the cylinder 32, and the receiving groove 311 is adapted to the rudder rail reference surface. A set of the supporting device 3 is mounted at each of the four corners of the mounting frame 2, and the four sets of the supporting device 3 are all located on the same side of the mounting frame 2. The cylinder 32 has the characteristics of adjustable stroke and adjustable thrust, meeting the positioning requirements of the rudder rail. The receiving groove 311 on the profile block 31 that cooperates with the rudder rail reference surface can stably rotate the rudder rail.

[0033] As Figure 1 and Figure 3 shown, the pre-positioning device 4 includes a mounting base 41, a claw 42 and an elastic member. The mounting base 41 is detachably fixed to the peripheral edge position of the mounting frame 2 by bolts. The mounting base 41 is located on the side wall of the mounting frame 2 opposite to the cylinder 32. Two claws 42 are mounted on the mounting base 41 by pins, and both claws 42 are slidably engaged with the mounting base 41. The elastic member is a spring 43, and the spring 43 is arranged corresponding to the claw 42. The telescopic direction of any spring 43 is the same as the sliding direction of its corresponding claw 42, and both ends of any spring 43 respectively abut against the corresponding claw 42 and the inner wall of the mounting base 41. In the free state, the spring 43 is in a compressed state and closes the two claws 42, thereby realizing the stable clamping of the rudder rail. After the cylinder 32 works and the rudder rail is pushed open, the claws 42 release the rudder rail and automatically rebound to the initial state under the pressure of the spring 43.

[0034] Further, an outer pushing surface 421 and a check surface 422 are formed at the end of the claw 42 away from the mounting base 41, and both the outer pushing surface 421 and the check surface 422 are smooth inclined surfaces. Due to the guiding action of the outer pushing surface 421, the rudder rail can be more easily disengaged from the claw 42 during the operation of the cylinder 32, and under the action of the check surface 422, it is prevented that the rudder rail disengaged from the claw 42 enters between the two claws 42 again. And a set of the pre-positioning device 4 is detachably fixed at each of the four corners of the mounting frame 2 by bolts.

[0035] As Figure 1 、 Figure 2 and Figure 3 shown, a roller 5 seat 22 is fixed to each of the four corners of the mounting frame 2 by bolts. The roller 5 seat 22 is in a fork shape, and a roller 5 is rotatably mounted on each of the four roller 5 seats 22 through a rotating shaft. The rolling direction of the roller 5 is the same as the length direction of the mounting base 1. The circular support mechanism enters the thin-walled cylinder through the rolling cooperation of the roller 5 with the thin-walled cylinder, and any roller 5 is made of high-load polyurethane material, which can ensure sufficient strength and will not scratch the workpiece at the same time.

[0036] The inner wall of the thin-walled cylinder is supported by a support device 3, a pre-positioning device 4, and a roller 5 that are detachably fixed to the mounting frame 2 and are arranged in correspondence. The support device 3, the pre-positioning device 4, and the roller 5 on the mounting frame 2 are modularly designed and can be selected according to thin-walled cylinders of different lengths and sizes. Moreover, two mounting frames 2 are arranged at intervals along the length direction of the mounting base 1 on the mounting base 1.

[0037] Working principle

[0038] During operation, the staff first installs a support device 3, a pre-positioning device 4, and a roller 5 of appropriate sizes on the mounting frame 2 through bolts. Then, four sets of clamping jaws 42 are used to clamp four sets of rudder rails inside the thin-walled cylinder. Then, with the help of the rolling cooperation between the roller 5 and the inner wall of the thin-walled cylinder, the circular support mechanism is pushed into the thin-walled cylinder. After that, four cylinders 32 are started, and the four cylinders 32 respectively drive the corresponding profiled blocks 31 to move towards the direction close to the inner wall of the thin-walled cylinder. During the process of the four profiled blocks 31 moving towards the direction close to the thin-walled cylinder, the four sets of rudder rails are respectively ejected from the four sets of clamping jaws 42 by four receiving grooves 311 adapted to the rudder rails until the four profiled blocks 31 all abut against the inner wall of the thin-walled cylinder. Thus, multi-point circular support is achieved, the fitting gap between two parts to be processed is reduced, and the installation is convenient.

[0039] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0040] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. Without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A thin-walled cylinder rounding mechanism, characterized in that, It includes an installation base (1), an installation frame (2), a support device (3) and a pre-positioning device (4); The installation frame (2) is arranged on the installation base (1) and is in sliding fit with it. A connection device (6) for fixedly connecting the two is arranged between the installation base (1) and the installation frame (2); The support device (3) includes a profiled block (31) for supporting the inner wall of the thin-walled cylinder and a driving member for driving the profiled block (31) to approach or move away from the inner wall of the thin-walled cylinder. And multiple groups of the support device (3) are detachably fixed at intervals on the periphery of the installation frame (2); The pre-positioning device (4) is used for installing the part to be processed, and multiple groups of the pre-positioning device (4) are detachably fixed at intervals on the periphery of the installation frame (2). The driving member includes a cylinder (32). The piston rod of the cylinder (32) is fixedly connected to the profiled block (31), and the telescopic direction of the piston rod of the cylinder (32) is the same as the direction in which the profiled block (31) approaches or moves away from the inner wall of the thin-walled cylinder; The pre-positioning device (4) includes a mounting seat (41), claws (42) and an elastic member. The mounting seat (41) is detachably fixed at the peripheral edge position of the installation frame (2). The mounting seat (41) is located on the side wall of the installation frame (2) opposite to the cylinder (32). Two claws (42) are mounted on the mounting seat (41) through a pin shaft. Both of the two claws (42) are in sliding fit with the mounting seat (41). The elastic member is used to drive the two claws (42) to close, and the elastic member is arranged in the mounting seat (41); One end of the claw (42) away from the mounting seat (41) is provided with a pushing surface (421) and a check surface (422). The pushing surface (421) is used to guide the clamped part out of the claw (42), and the check surface (422) is used to prevent the part from entering between the two claws (42); The elastic member includes a spring (43); In the free state, the spring is in a compressed state and closes the two claws, so as to realize the stable clamping of the rudder rail. After the cylinder works and the rudder rail is pushed open, the claws release the rudder rail and automatically rebound to the initial state under the pressure of the spring; Rollers (5) are rotatably mounted on the installation frame (2). A plurality of rollers (5) are arranged at intervals on the periphery of the installation frame (2), and the moving direction of the rollers (5) is the same as the sliding direction of the installation frame (2); 2. The thin-wall cylinder rounding mechanism according to claim 1, wherein, The connection assembly includes a connection block (61) and a locking block (62). One locking block (62) is installed on each of the two opposite sides of the connection block (61). One of the locking blocks (62) is fixedly connected to the installation frame (2), and a fixing assembly (7) is connected between the other locking block (62) and the installation base (1).

3. The thin-walled cylinder circular support mechanism according to claim 2, characterized in that, The mounting base (1) is provided with a mounting groove (11), and the fixing assembly (7) comprises a fixing bolt (71) and a fixing nut (72), the bolt cap of the fixing bolt (71) is embedded in the mounting groove (11), and the fixing bolt (71) is slidably engaged with the mounting groove (11), the fixing bolt (71) is threadedly penetrated by a locking block (62), the fixing nut (72) is threadedly engaged with a threaded end of the fixing bolt (71) that passes through the locking block (62), and the fixing nut (72) is tightly pressed against the locking block (62).

4. A thin-walled cylinder circular support mechanism according to claim 1, characterized in that, A receiving groove (311) is formed on the side of the profile block (31) facing away from the driving member.

5. A thin-walled cylinder circularity support mechanism according to claim 1, characterized in that, The roller (5), the supporting device (3) and the pre-positioning device (4) are arranged correspondingly.

Images