CN113634643B - Eccentric vibration progressive forming device for thin-wall pipe ends - Google Patents

Abstract

The invention discloses an eccentric vibration progressive forming device for a thin-walled pipe end, which includes an eccentric ball head forming part, the eccentric ball head forming part includes an eccentric tool shaft, one end of the eccentric tool shaft is connected with a step shaft, and the other end corresponds to the thin wall to be processed The end of the pipe is formed with an eccentric head; the stepped shaft is equipped with a pair of angular contact ball bearings, and an adjustment buffer assembly is arranged between the pair of angular contact ball bearings and the stepped shaft. The side away from the eccentric tool shaft is connected with a lathe connecting piece, which is used to connect the lathe so that the eccentric head corresponds to the end of the thin-walled pipe to be processed; when the lathe is started, the angular contact ball bearing pair is used to drive the eccentric The eccentric vibration of the ball head forming part is used for vibration flanging of the thin-walled pipe end to be processed. The invention realizes the vibration of the forming tool on the metal pipe, and has the advantages of refining material crystal grains, improving material plasticity and toughness, convenient structure and strong practicability.

Description

An Eccentric Vibration Progressive Forming Device for Thin-walled Tube Ends

technical field

The invention belongs to the technical field of plastic material forming, in particular to an eccentric vibration progressive forming device for a thin-walled pipe end.

Background technique

At present, in the research on the outer (inner) flanging of metal pipe ends, the main forming tools used are rotary wheels and ball-headed metal rods. The rotary wheels have the function of self-rotation, but the rotation of the rotary wheels is generally realized by bearings, resulting in The larger the diameter of the tool, the larger the contact area with the pipe, resulting in a large forming force; the metal rod with the ball head has no self-rotation function during the contact with the pipe, and it is sliding friction when it contacts the metal pipe, resulting in an increase in the tangential force. Formed parts are prone to wrinkling. Therefore, currently, more forming tools are used in the forming process of the outer (inner) flanging of the metal pipe end. Due to the inherent characteristics of large deformation of the material along the outer edge of the pipe end, the internal grain structure of the material is easily damaged during the forming process, resulting in cracks. , wrinkling, and cracking occur, which reduces the quality and precision of formed parts to a certain extent.

Contents of the invention

The purpose of the present invention is to provide a thin-walled pipe end eccentric vibration progressive forming device, which solves the problem that the internal grain structure of the material is easily damaged during the current forming process, resulting in low quality and precision of the formed part.

The technical scheme that the present invention adopts is,

An eccentric vibration progressive forming device for a thin-walled pipe end, comprising an eccentric ball head forming part, the eccentric ball head forming part includes an eccentric tool shaft, one end of the eccentric tool shaft is connected with a step shaft, and the other end is formed corresponding to the thin-walled pipe end to be processed. Eccentric head; the step shaft is equipped with a pair of angular contact ball bearings, and an adjustment buffer assembly is arranged between the pair of angular contact ball bearings and the step shaft. One side of the lathe is connected with a lathe connecting piece, and the lathe connecting piece is used to connect the lathe so that the eccentric head corresponds to the thin-walled pipe end to be processed; when the lathe is started, the angular contact ball bearing pair is used to drive the eccentric ball head forming part Eccentric vibration for vibratory flanging of thin-walled pipe ends to be processed.

The present invention is also characterized in that,

The adjustment buffer assembly includes an adjustment ring arranged on the stepped shaft in the middle of the pair of angular contact ball bearings, and a shaft end retaining ring arranged on the stepped shaft between the pair of angular contact ball bearings and the lathe connecting piece.

The eccentric tool shaft is a cylindrical rod, the eccentric head is hemispherical, and the radial section of the eccentric head is correspondingly connected with the radial section of the eccentric tool shaft.

The eccentric head, eccentric tool shaft and stepped shaft are integrally formed.

The bearing set includes two bearing sleeves, and the two bearing sleeves are correspondingly arranged on both sides of the angular contact ball bearing pair.

Each bearing sleeve includes a bearing sleeve base, one side of the bearing sleeve base is formed with an arc-shaped groove, two bearing sleeves are correspondingly provided with at least two second mounting holes, and each bearing sleeve is provided with a first mounting hole corresponding to the lathe connecting piece .

The lathe connecting piece includes a tool handle, one end of the tool handle is used to connect the lathe, and the other end of the tool handle is provided with a fixed connection seat, and a plurality of positioning holes are provided on the fixed connection seat corresponding to the first installation hole.

Both the two bearing sleeves and the connecting parts of the lathe are connected by bolts.

The beneficial effect of the present invention is: the eccentric vibration progressive forming device of the thin-walled pipe end of the present invention, through reasonable structural design, makes the processing adopt the vibration mode, the vibration can refine the material grain, improve the plasticity and toughness of the material, in addition , the introduction of the bearing changes the sliding friction between the ball head forming tool and the pipe into rolling friction, which effectively improves the forming quality and forming accuracy on the basis of improving the convenience of the structure.

Description of drawings

Fig. 1 is a structural schematic diagram of a thin-walled pipe end eccentric vibration progressive forming device of the present invention;

Fig. 2 is a structural schematic diagram of the eccentric ball head forming part in the bearing sleeve in a thin-walled pipe end eccentric vibration progressive forming device of the present invention;

Fig. 3 is a structural schematic diagram of a bearing sleeve in a thin-walled pipe end eccentric vibration progressive forming device of the present invention;

Fig. 4 is a schematic cutaway diagram of an assembly of a thin-walled pipe end eccentric vibration progressive forming device of the present invention;

Fig. 5 is a structural schematic diagram of a lathe connector in a thin-walled pipe end eccentric vibration progressive forming device according to the present invention.

In the figure, 1. Eccentric head, 2. Step shaft, 3. Eccentric tool shaft, 4. Bearing sleeve; 41. Bearing sleeve base, 42. Arc groove, 43. First mounting hole, 44. Second mounting hole; 5. Angular contact ball bearing pair, 6. Lathe connector; 61. Tool handle, 62. Fixed connection seat, 63. Positioning hole; 7. Shaft end retaining ring, 8. Adjusting ring, 9. Step shaft fixing bolt.

Detailed ways

A thin-walled pipe end eccentric vibration progressive forming device of the present invention will be described in detail below in conjunction with the drawings and specific embodiments.

As shown in Figure 1 and Figure 4, an eccentric vibration progressive forming device for thin-walled pipe ends is used for installation on a horizontal lathe for the operation of forming outer (inner) flanging of metal pipe ends, and the device includes eccentric tools Shaft 3, eccentric tool Shaft 3 is a cylindrical rod. One end of the cylindrical rod is connected with a stepped shaft 2, and the other end is formed with an eccentric head 1. The processing surface of the eccentric head 1 corresponding to the thin-walled pipe end can be spherical or arcuate; cylindrical The rod, the step shaft 2 and the eccentric head 1 can be integrally formed, or connected and fixed later;

As shown in Figure 2, the step shaft 2 of the eccentric vibration progressive forming device for thin-walled pipe ends of the present invention is designed as a step, the purpose is to coincide with the pair of angular contact ball bearings 5, which are double-layer shafts , can be matched with the stepped shaft 2, and the bottom of the stepped shaft 2 is equipped with a stepped shaft fixing bolt, so that the angular contact ball bearing pair 5 is stably arranged on the stepped shaft 2.

As shown in Figure 3, an eccentric vibration progressive forming device for thin-walled pipe ends of the present invention is provided with an adjustment ring 8 in the middle of the angular contact ball bearing pair 5 around the step shaft 2, and the adjustment ring 8 can adjust the gap between the two bearings. The clearance provides preload between the two bearings. The side of the angular contact ball bearing pair 5 is provided with two fastened bearing sleeves 4, the bearing sleeve 4 has a bearing sleeve base 41, and the opposite side of the two bearing sleeves 4 is formed with an arc groove 42 to form a fastening angle. The cylindrical accommodation cavity of the contact ball bearing pair 5 clamps the stepped shaft 2 of the eccentric ball head forming part in the angular contact bearing pair 5 through interference fit, and the bottom of the angular contact ball bearing pair 5 is also equipped with a shaft end stop The ring 7, which cooperates to prevent axial movement between the eccentric ball head forming part and the angular contact bearing pair 5. Thereby improving the stability of processing operations.

The two bearing sleeves 4 are correspondingly provided with at least two second installation holes 44 , and each bearing sleeve 4 is provided with a first installation hole 43 corresponding to the lathe connector 6 . The two bearing sleeves 4 are oppositely opened with two or four second mounting holes 44 , and then bolts pass through the second mounting holes 44 to connect the two bearing sleeves 4 .

As shown in Figure 5, each bearing sleeve 4 of the thin-walled pipe end eccentric vibration progressive forming device of the present invention is provided with two first installation holes 43 on the side close to the lathe connector 6, and the lathe connector 6 includes Knife handle 61, one end of the knife handle 61 is used to connect the driving part of lathe, so that the eccentric head 1 of this device is controlled by the lathe during operation and corresponds to the processing pipe end position. The other end of the knife handle 61 is provided with a fixed connection seat 62, and four positioning holes 63 are provided corresponding to the four first mounting holes 43 on the fixed connection seat 62, and the first mounting holes 43 and the positioning holes 63 are matched by bolts, so that The upper structure is fixedly connected to the lathe connector 6 .

The installation and working process of a thin-walled pipe end eccentric vibration progressive forming device of the utility model is as follows: the angular contact ball bearing pair 5 is installed on the step shaft 2 through interference fit, the step shaft fixing bolt 9 is installed, and the shaft end is blocked. The ring 7 is fixed on the shaft end of the stepped shaft 2 to prevent the angular contact ball bearing pair 5 from sliding; then the two bearing sleeves 4 are fastened on the periphery of the angular contact ball bearing pair 5. After the installation is completed, the two bearing sleeves 4 are passed through The bolts are fixed together; the lathe connecting piece 6 is connected with the two bearing sleeves 4 by bolts. The forming device after installation is shown in Figure 5; during operation, connect the lathe connector 6 to the lathe, the lathe installs the pipes to be processed, and the lathe controls the eccentric head 1 of the eccentric ball head forming part and the pipe to be processed. end corresponding; then the lathe controls the device to carry out the outer (inner) flanging of the pipe end of the pipe end. When the operation starts, the eccentric ball head forming part will rotate under the friction between the pipe wall and the side wall of the eccentric ball head forming part, and because the eccentric ball head forming part has its own eccentricity, the eccentric ball head forming In the process, the purpose of vibration processing of metal pipes by forming tools is achieved.

The utility model is an eccentric vibration progressive forming device for thin-walled pipe ends. Through a reasonable structural design, the vibration of the forming tool to the metal pipe can be realized, and it has the advantages of refining the material grain and improving the plasticity and toughness of the material. The structure of the device Convenient, strong practicability, has certain practical significance.

Claims (1)

1. The eccentric vibration incremental forming device for the thin-wall pipe end is characterized by comprising an eccentric ball forming piece, wherein the eccentric ball forming piece comprises an eccentric tool shaft (3), one end of the eccentric tool shaft (3) is connected with a step shaft (2), and the other end of the eccentric tool shaft is provided with an eccentric head (1) corresponding to the thin-wall pipe end to be processed; the step shaft (2) is provided with an angular contact ball bearing pair (5), an adjusting buffer assembly is further arranged between the angular contact ball bearing pair (5) and the step shaft (2), the angular contact ball bearing pair (5) is sleeved with a bearing sleeve group, one side, far away from the eccentric tool shaft (3), of the bearing sleeve group is connected with a lathe connecting piece (6), and the lathe connecting piece (6) is used for connecting a lathe so as to enable the eccentric head (1) to correspond to a thin-wall pipe end to be processed; under the condition that the lathe is started, the angular contact ball bearing pair (5) is used for driving the eccentric ball head forming part to vibrate eccentrically so as to perform vibration flanging on the thin-wall pipe end to be processed;

the adjusting buffer assembly comprises an adjusting ring (8) arranged in the middle of the step shaft (2) and positioned between the angular contact ball bearing pair (5), and a shaft end check ring (7) arranged between the step shaft (2) and positioned between the angular contact ball bearing pair (5) and the lathe connecting piece (6);

the eccentric tool shaft (3) is a cylindrical rod, the eccentric head (1) is hemispherical, and the radial tangential plane of the eccentric head (1) is correspondingly connected with the radial tangential plane of the eccentric tool shaft (3);

the eccentric head (1), the eccentric tool shaft (3) and the step shaft (2) are of an integrated structure;

the bearing sleeve group comprises two bearing sleeves (4), and the two bearing sleeves (4) are respectively and correspondingly arranged at two sides of the angular contact ball bearing pair (5);

each bearing sleeve (4) comprises a bearing sleeve base (41), an arc-shaped groove (42) is formed in one side of each bearing sleeve base (41), at least two second mounting holes (44) are correspondingly formed in each bearing sleeve (4), and a first mounting hole (43) is formed in each bearing sleeve (4) corresponding to a lathe connecting piece (6);

the lathe connecting piece (6) comprises a cutter handle (61), one end of the cutter handle (61) is used for being connected with a lathe, a fixed connecting seat (62) is arranged at the other end of the cutter handle (61), and a plurality of positioning holes (63) are formed in the fixed connecting seat (62) corresponding to the first mounting holes (43);

the two bearing sleeves (4) and the two bearing sleeves (4) are connected with the lathe connecting piece (6) through bolts.