阅读说明：本技术 一种薄壁管端偏心振动渐进成形装置 (Thin-wall pipe end eccentric vibration incremental forming device ) 是由 侯晓莉 李言 邱旭 杨明顺 高新勤 袁启龙 于 2021-07-30 设计创作，主要内容包括：本发明公开了一种薄壁管端偏心振动渐进成形装置,包括偏心球头成形件,偏心球头成形件包括偏心工具轴,偏心工具轴的一端连接有台阶轴、另一端对应待加工薄壁管端形成有偏心头；台阶轴配置有角接触球轴承对,角接触球轴承对与台阶轴之间还配置有调节缓冲组件,角接触球轴承对套设有轴承套组,轴承套组在远离偏心工具轴的一侧连接有车床连接件,车床连接件用于连接车床,以便将偏心头与待加工薄壁管端对应；在车床启动的情形下,角接触球轴承对用于带动偏心球头成形件偏心振动,以便对待加工薄壁管端进行振动翻边。本发明实现成形工具对金属管材的振动,具有细化材料晶粒、提高材料塑性和韧性、结构便捷和实用性较强的优点。(The invention discloses a thin-wall pipe end eccentric vibration incremental forming device which comprises an eccentric ball head forming piece, wherein the eccentric ball head forming piece comprises an eccentric tool shaft, one end of the eccentric tool shaft is connected with a step shaft, and the other end of the eccentric tool shaft is provided with an eccentric head corresponding to the end of a thin-wall pipe to be processed; the step shaft is provided with an angular contact ball bearing pair, an adjusting buffer assembly is further arranged between the angular contact ball bearing pair and the step shaft, a bearing sleeve set is sleeved on the angular contact ball bearing pair, one side, far away from the eccentric tool shaft, of the bearing sleeve set is connected with a lathe connecting piece, and the lathe connecting piece is used for connecting a lathe so as to enable the eccentric head to correspond to the end of the thin-wall pipe to be machined; under the condition that the lathe is started, the angular contact ball bearing pair is used for driving the eccentric ball head forming piece to eccentrically vibrate so as to carry out vibration flanging on the thin-wall pipe end to be machined. The invention realizes the vibration of the forming tool to the metal pipe, and has the advantages of refining material grains, improving the plasticity and toughness of the material, convenient structure and strong practicability.)

1. The thin-wall pipe end eccentric vibration incremental forming device is characterized by comprising an eccentric ball head forming piece, wherein the eccentric ball head 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 corresponds to the thin-wall pipe end to be processed and is provided with an eccentric head (1); 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), a bearing sleeve set is sleeved on the angular contact ball bearing pair (5), a lathe connecting piece (6) is connected to one side, far away from the eccentric tool shaft (3), of the bearing sleeve set, and the lathe connecting piece (6) is used for connecting a lathe so as to enable the eccentric head (1) to correspond to the end of a thin-wall pipe to be machined; under the condition that the lathe is started, the angular contact ball bearing pair (5) is used for driving the eccentric ball-shaped piece to eccentrically vibrate so as to carry out vibration flanging on the thin-walled pipe end to be machined.

2. The eccentric vibrating incremental forming device for thin-walled pipe ends as claimed in claim 1, characterized in that the adjusting and buffering assembly comprises an adjusting ring (8) arranged between the angular contact ball bearing pair (5) and the step shaft (2), and a shaft end retainer ring (7) arranged between the angular contact ball bearing pair (5) and the lathe connecting piece (6).

3. The eccentric vibratory incremental forming apparatus of thin walled pipe ends as claimed in claim 1 wherein the eccentric tool shaft (3) is a cylindrical rod and the eccentric head (1) is hemispherical, the radial cut of the eccentric head (1) corresponding to the radial cut of the eccentric tool shaft (3).

4. The eccentric vibrating incremental forming device for thin-walled pipe ends according to claim 1 or 3, characterized in that the eccentric head (1), the eccentric tool shaft (3) and the step shaft (2) are of an integrally formed structure.

5. The eccentric vibrating incremental forming device for the thin-walled pipe end according to claim 1, characterized in that the bearing sleeve set comprises two bearing sleeves (4), and the two bearing sleeves (4) are respectively and correspondingly arranged on two sides of the angular contact ball bearing pair (5).

6. The eccentric vibration incremental forming device for the thin-wall pipe end according to claim 5, wherein 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 of the two bearing sleeves (4), and a first mounting hole (43) is formed in each bearing sleeve (4) corresponding to the lathe connecting piece (6).

7. The eccentric vibration incremental forming device for the thin-wall pipe end according to claim 6, wherein the lathe connecting piece (6) comprises a cutter handle (61), one end of the cutter handle (61) is used for connecting a lathe, the other end of the cutter handle (61) is provided with a fixed connecting seat (62), and a plurality of positioning holes (63) are formed in the fixed connecting seat (62) corresponding to the first mounting holes (43).

8. The eccentric vibrating incremental forming device for the thin-walled pipe end according to claim 5, characterized in that the two bearing sleeves (4) and the lathe connecting piece (6) are connected through bolts.

Technical Field

The invention belongs to the technical field of plastic material forming, and particularly relates to a thin-wall pipe end eccentric vibration incremental forming device.

Background

At present, in the research of forming the external (internal) flanging of the end of a metal pipe, a forming tool mainly used is provided with a rotary wheel and a ball head metal rod, the rotary wheel has an autorotation function, but the autorotation of the rotary wheel is generally realized through a bearing, so that the diameter of the rotary wheel tool is larger, the contact area with the pipe is increased, and the forming force is large; in the contact process of the ball head metal rod and the pipe, the ball head metal rod has no autorotation function, and is in sliding friction when being in contact with the metal pipe, so that the tangential force is increased, and the formed piece is easy to wrinkle. Therefore, at present, more forming tools are used in the forming process of the outer (inner) flanging of the metal pipe end, and due to the inherent characteristic of large deformation of the outer edge material of the pipe end, the internal crystal grain structure of the material is easily damaged in the forming process, so that the phenomena of cracks, wrinkling and breakage are generated, and the quality and the precision of a formed part are reduced to a certain extent.

Disclosure of Invention

The invention aims to provide a thin-wall pipe end eccentric vibration incremental forming device, which solves the problem that the quality and the precision of a formed part are not high because the crystal grain structure in the material is easy to damage in the existing forming process.

The technical scheme adopted by the invention is that,

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

The present invention is also characterized in that,

the adjusting and buffering assembly comprises an adjusting ring arranged in the middle of the step shaft positioned between the angular contact ball bearing pair and a shaft end check ring arranged between the step shaft positioned between the angular contact ball bearing pair 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, the eccentric tool shaft and the step shaft are of an integrally formed structure.

The bearing sleeve group comprises two bearing sleeves, and the two bearing sleeves are respectively and correspondingly arranged on two sides of the angular contact ball bearing pair.

Every bearing housing includes the bearing housing base, and one side of bearing housing base is formed with the arc wall, and two at least second mounting holes are all seted up to two bearing housings correspondence, and every bearing housing corresponds the lathe connecting piece and has seted up first mounting hole.

The lathe connecting piece includes the handle of a knife, and the one end of handle of a knife is used for connecting the lathe, and the other end of handle of a knife is provided with fixed connection seat, and a plurality of locating hole has been seted up corresponding first mounting hole on the fixed connection seat.

The two bearing sleeves and the lathe connecting piece are connected through bolts.

The invention has the beneficial effects that: according to the thin-wall pipe end eccentric vibration incremental forming device, through reasonable structural design, a vibration mode is adopted in machining, material grains can be refined through vibration, the plasticity and toughness of the material are improved, in addition, sliding friction between a ball head forming tool and a pipe is changed into rolling friction through introduction of a bearing, and the forming quality and the forming precision are effectively improved on the basis of improving the structural convenience.

Drawings

FIG. 1 is a schematic structural view of an eccentric vibration incremental forming device for a thin-wall pipe end according to the present invention;

FIG. 2 is a schematic structural diagram of an eccentric ball head forming part in a bearing sleeve in the thin-wall pipe end eccentric vibration incremental forming device;

FIG. 3 is a schematic structural diagram of a bearing sleeve in the eccentric vibration incremental forming device for the thin-wall pipe end of the invention;

FIG. 4 is a sectional view of an assembly of the eccentric vibration incremental forming device for the end of a thin-wall pipe;

FIG. 5 is a schematic structural diagram of a lathe connecting piece in the thin-wall pipe end eccentric vibration incremental forming device.

In the figure, 1 is an eccentric head, 2 is a step shaft, 3 is an eccentric tool shaft, and 4 is a bearing sleeve; 41. a bearing sleeve base, 42, an arc-shaped groove, 43, a first mounting hole and 44, a second mounting hole; 5. angular contact ball bearing pair, 6. lathe connecting piece; 61. the cutter handle is fixed at 62 degrees, and the connecting seat is fixed at 63 degrees; 7. the shaft end retainer ring, 8, the adjusting ring and 9, the step shaft fixing bolt.

Detailed Description

The thin-wall pipe end eccentric vibration incremental forming device is described in detail below with reference to the accompanying drawings and the detailed description.

As shown in fig. 1 and 4, the eccentric vibration incremental forming device for the thin-wall pipe end is used for being installed on a horizontal lathe and used for the operation of forming the outer (inner) flanging of the metal pipe end, and comprises an eccentric tool shaft 3, wherein the eccentric tool shaft 3 is a cylindrical rod, one end of the cylindrical rod is connected with a step shaft 2, the other end of the cylindrical rod is provided with an eccentric head 1, and the processing surface of the eccentric head 1, which corresponds to the thin-wall pipe end, can be a spherical surface or an arc surface; the cylindrical rod, the step shaft 2 and the eccentric head 1 can be integrally formed and can also be connected and fixed at a later stage;

as shown in fig. 2, the step shaft 2 of the thin-walled tube end eccentric vibration incremental forming device of the present invention is designed to be step-shaped in order to fit with the pair of angular contact ball bearings 5, the pair of angular contact ball bearings 5 is a double-layered shaft and can be matched with the step shaft 2, and the step shaft fixing bolt is disposed at the bottom of the step shaft 2, so that the pair of angular contact ball bearings 5 is stably disposed on the step shaft 2.

As shown in fig. 3, the thin-walled tube end eccentric vibration incremental forming device of the present invention is provided with an adjusting ring 8 around the step shaft 2 in the middle of the angular contact ball bearing pair 5, and the adjusting ring 8 can adjust the clearance between the two bearings to provide pre-pressing between the two bearings. The side cover of angular contact ball bearing pair 5 is equipped with two bearing housing 4 of lock, and bearing housing 4 has bearing housing base 41, and the opposite side of two bearing housing 4 locks is formed with arc groove 42, forms the cylindrical holding cavity of lock angular contact ball bearing pair 5, and the step axle 2 with eccentric bulb forming part passes through interference fit centre gripping in angular contact ball bearing pair 5, and axle head retaining ring 7 is still installed to the bottom of angular contact ball bearing pair 5, and its combined action prevents axial motion between eccentric bulb forming part and the angular contact bearing pair 5. Thereby improving the stability of the processing operation.

At least two second mounting holes 44 are correspondingly formed in the two bearing sleeves 4, and a first mounting hole 43 is formed in each bearing sleeve 4 corresponding to the lathe connecting piece 6. Two or four second mounting holes 44 are oppositely formed in the two bearing sleeves 4, and then bolts penetrate through the second mounting holes 44 to connect the two bearing sleeves 4.

As shown in fig. 5, each bearing sleeve 4 of the thin-wall pipe end eccentric vibration incremental forming device of the present invention has two first mounting holes 43 on one side close to the lathe connecting piece 6, the lathe connecting piece 6 includes a tool shank 61, and one end of the tool shank 61 is used for connecting a driving part of a lathe, so that the eccentric head 1 of the device is controlled by the lathe during operation and the position of the machined pipe end corresponds to each other. The other end of the tool shank 61 is provided with a fixed connection seat 62, four positioning holes 63 are formed in the fixed connection seat 62 and correspond to the four first mounting holes 43, and the first mounting holes 43 and the positioning holes 63 are matched and connected through bolts so as to fixedly connect the upper part structure to the lathe connecting piece 6.

The utility model relates to an eccentric vibration of thin wall pipe end shaper that advances gradually's installation and working process do: the angular contact ball bearing pair 5 is arranged on the step shaft 2 in an interference fit manner, a step shaft fixing bolt 9 is arranged, and a shaft end retainer ring 7 is fixed at the shaft end of the step shaft 2 to prevent the angular contact ball bearing pair 5 from sliding; then buckling the two bearing sleeves 4 on the periphery of the angular contact ball bearing pair 5, and fixing the two bearing sleeves 4 together through bolts after the installation is finished; the lathe connecting piece 6 is connected with the two bearing sleeves 4 through bolts. The forming device after installation is shown in fig. 5; during operation, the lathe connecting piece 6 is connected with a lathe, the pipe needing to be processed is mounted on the lathe, and the lathe enables the eccentric head 1 of the eccentric ball head forming piece to correspond to the pipe end of the pipe needing to be processed through control; then the lathe controls the device to perform pipe end outer (inner) flanging forming on the pipe end of the pipe. After the operation is started, the eccentric ball-shaped piece can rotate under the friction action between the pipe wall and the side wall of the eccentric ball-shaped piece, and the purpose of vibration processing of the metal pipe by the forming tool is achieved in the rotating process of the eccentric ball-shaped piece due to the fact that the eccentric ball-shaped piece has the eccentric amount.

The utility model relates to a thin wall pipe end eccentric vibration shaper that advances gradually through reasonable structural design, can realize the vibration of shaping instrument to metal tubular product, has the some of refining material crystalline grain, improving material plasticity and toughness, and the structure of this device is convenient, and the practicality is stronger, has certain practical meaning.