Passive rolling type pipe forming device
By designing a passive rolling pipe forming device, using roller set and ball technology, the problem of difficult control and distortion of pipe forming accuracy is solved, and high-precision and low-friction pipe forming is achieved.
Patent Information
- Application Number
- CN202421798666.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-26
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-07-26
AI Technical Summary
In the prior art, problems such as difficult to control the molding accuracy and rotating and twisting of the pipe are prone to occur when forming the pipe.
A passive rolling pipe forming device is designed, including a fixing plate, a through hole and four roller sets. The roller set is connected by a fixed shaft and a bearing to form an extrusion cavity that is adapted to the pipe, and the balls are arranged on the inner wall of the through hole to reduce friction.
The device avoids the twisting of the pipe through passive rolling technology, reduces friction, extends the service life of the device, and improves the precision of the pipe forming.
Smart Images
Figure CN222856448U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of metal or pipe forming, in particular to a passive rolling type pipe forming device. Background Art
[0002] In the field of metal or tube forming, there are many situations that require low friction and high forming precision, especially tube forming. At present, tube forming often adopts the form of drawing forming: the tube blank is passed through the die hole on the mold, so that the die hole squeezes the tube blank and changes the diameter of the tube, and then the tube is pulled by traction force to change the wall thickness of the tube, so as to complete the processing of the tube. Although this tube forming method can achieve the desired effect, when the tube passes through the die hole, there will be mutual friction between the tube and the die hole. When the die hole is used for a long time, its precision will decrease, which will affect the forming precision of the tube, and it may also rotate during the drawing process, causing the tube to twist; based on this, the present application proposes a passive rolling tube forming device. Utility Model Content
[0003] The utility model provides a passive rolling tube forming device, which solves the problem in the above background technology that the tube is formed by drawing, the tube forming accuracy is difficult to control, and rotation may occur during the drawing process, causing the tube to twist.
[0004] The utility model provides the following technical solutions: a passive rolling type pipe forming device, comprising a fixed plate, a through hole adapted to the pipe is provided in the middle of the fixed plate, an upper left roller group, a lower left roller group, an upper right roller group and a lower right roller group are respectively arranged around the through hole, and the upper left roller group, the lower left roller group, the upper right roller group and the lower right roller group have the same structure; the upper left roller group comprises a fixed seat fixedly connected to the fixed plate, the fixed seat is movably connected with a roller through a fixed shaft, an extrusion cavity adapted to the pipe is formed between the four rollers, and the central axis of the extrusion cavity is on the same straight line as the central axis of the through hole.
[0005] Preferably, one end of the fixed shaft is fixedly connected to the fixed seat via a first fixing screw, and the other end of the fixed shaft is connected to a bearing and a roller.
[0006] Preferably, the roller and the bearing are fixed by a retaining ring through a hole, an extrusion groove is provided in the middle of the roller, the cross section of the extrusion groove is arc-shaped, and the inner diameter of the cross section of the extrusion groove is the same as the outer diameter of the tube.
[0007] Preferably, two bearings are provided in the inner cavity of the roller, the two bearings are in a stacked state, both bearings are sleeved on the fixed shaft, and the bearings are connected to the fixed shaft via a second fixing screw.
[0008] Preferably, the angle between two adjacent rollers is ninety degrees.
[0009] Preferably, the inner wall of the through hole is evenly and movably connected with balls, and the through hole is in contact with the tube through the balls.
[0010] Compared with the prior art, the utility model has the following beneficial effects:
[0011] 1. The passive rolling tube forming device has a simple structure and is easy to use. When in use, it passively rolls the tube blank, avoiding the problem of twisting of the tube blank during movement, reducing the friction between the tube blank and the tube blank, extending the service life of the device, reducing the loss of the blank, and ensuring the tube forming accuracy.
[0012] 2. The passive rolling tube forming device can further shape the formed tube through the arrangement of through holes and balls to ensure the tube forming accuracy. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a front view of the structure of the utility model;
[0014] Figure 2 This is an enlarged schematic diagram of the structural roller of the utility model;
[0015] Figure 3 It is a schematic diagram of the structural fixing plate of the utility model.
[0016] In the figure: 1. fixing plate; 2. upper left roller group; 3. fixing shaft; 4. first fixing screw; 5. upper right roller group; 6. lower right roller group; 7. lower left roller group; 8. second fixing screw; 9. retaining ring for hole; 10. bearing; 11. roller; 12. fixing seat; 13. through hole; 14. extrusion groove. DETAILED DESCRIPTION
[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0018] The utility model provides a passive rolling type pipe forming device, comprising a fixing plate 1, a through hole 13 adapted to the pipe is provided in the middle of the fixing plate 1, an upper left roller group 2, a lower left roller group 7, an upper right roller group 5 and a lower right roller group 6 are respectively provided around the through hole 13, the upper left roller group 2, the lower left roller group 7, the upper right roller group 5 and the lower right roller group 6 have the same structure, the upper left roller group 2, the lower left roller group 7, the upper right roller group 5 and the lower right roller group 6 can be fixed on the fixing plate 1 by hexagonal screws, so as to form a passive rolling type pipe forming device.
[0019] The upper left roller group 2 includes a fixed seat 12 fixedly connected to the fixed plate 1, and the fixed seat 12 is movably connected to the roller 11 through the fixed shaft 3. An extrusion cavity adapted to the tube is formed between the four rollers 11, and the central axis of the extrusion cavity is on the same straight line as the central axis of the through hole 13. Through the arrangement of the through hole 13 and the extrusion cavity, when the device is in use, during the drawing process of the tube, the four roller groups can passively roll the tube so that the tube can be roll-formed, and the inner wall of the through hole 13 is evenly and movably connected with balls, and the through hole 13 contacts the roll-formed tube through the balls. Through the arrangement of the balls, the friction between the through hole 13 and the tube is reduced, the wear of the tube is reduced, and the balls can shape the tube to improve the forming accuracy of the tube.
[0020] One end of the fixed shaft 3 is fixedly connected to the fixed seat 12 by a first fixing screw 4 , and the other end of the fixed shaft 3 is sleeved with two bearings 10 , which are in a stacked state and fixed together with the fixed shaft 3 by a second fixing screw 8 .
[0021] The outer part of the bearing 10 is sleeved with a roller 11, and the roller 11 and the bearing 10 are fixed with a retaining ring 9 through a hole. After the retaining ring 9 is clamped in the hole, the bearing 10 cannot move in the axial direction. If there is movement, a gasket must be added to eliminate the movement gap to ensure the stability of the position of the roller 11. Under the action of external force, the roller 11 can move axially along the fixed axis 3.
[0022] An extrusion groove 14 is provided in the middle of the roller 11. The cross section of the extrusion groove 14 is arc-shaped. The inner diameter of the cross section of the extrusion groove 14 is the same as the outer diameter of the tube. The angle between two adjacent rollers 11 is 90 degrees. The four extrusion grooves 14 form an extrusion cavity adapted to the tube, and the size of the extrusion cavity can be adjusted according to different requirements when the device is in use.
[0023] The material of the above-mentioned roller 11 is high-speed steel with an HRC hardness greater than 60. Smooth grinding is used during processing. The accuracy and smoothness of the arc need to be very high to ensure the accuracy of the formed circle.
[0024] The passive rolling tube forming device is used in the field of stainless steel tube welding and drawing of copper or aluminum tubes with linings. The former can prevent twisting during thin tube forming; the latter can reduce the friction of copper and aluminum tubes to achieve the purpose of close combination of copper and aluminum tubes and linings.
[0025] To sum up, when the passive rolling tube forming device is in use, the tube blank passes through the four rollers 11. During the movement of the tube blank, the rollers 11 roll the tube blank so that the blank can be rolled and formed, and twisting of the tube blank is avoided. The formed tube passes through the through hole 13, and the balls arranged in the through hole 13 further shape the tube, thereby improving the tube forming accuracy.
[0026] The standard parts used in the utility model can be purchased from the market, and the special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art and will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field. Although the embodiments of the utility model have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the attached claims and their equivalents.
Claims
1. A passive rolling tube forming device, comprising a fixing plate (1), characterized in that: A through hole (13) adapted to the pipe is provided in the middle of the fixing plate (1), and an upper left roller group (2), a lower left roller group (7), an upper right roller group (5) and a lower right roller group (6) are respectively provided around the through hole (13); the upper left roller group (2), the lower left roller group (7), the upper right roller group (5) and the lower right roller group (6) have the same structure; the upper left roller group (2) comprises a fixing seat (12) fixedly connected to the fixing plate (1), and the fixing seat (12) is movably connected to a roller (11) via a fixing shaft (3); an extrusion cavity adapted to the pipe is formed between the four rollers (11), and the central axis of the extrusion cavity is on the same straight line as the central axis of the through hole (13).
2. A passive rolling tube forming device according to claim 1, characterized in that: One end of the fixed shaft (3) is fixedly connected to the fixed seat (12) via a first fixing screw (4), and the other end of the fixed shaft (3) is connected to a bearing (10) and a roller (11).
3. A passive rolling tube forming device according to claim 2, characterized in that: The roller (11) and the bearing (10) are fixed by a retaining ring (9) through a hole. An extrusion groove (14) is provided in the middle of the roller (11). The cross section of the extrusion groove (14) is arc-shaped. The inner diameter of the cross section of the extrusion groove (14) is the same as the outer diameter of the pipe.
4. A passive rolling tube forming device according to claim 3, characterized in that: Two bearings (10) are arranged in the inner cavity of the roller (11), the two bearings (10) are in a stacked state, the two bearings (10) are both sleeved on the fixed shaft (3), and the bearings (10) are connected to the fixed shaft (3) via a second fixing screw (8).
5. A passive rolling tube forming device according to claim 1, characterized in that: The angle between two adjacent rollers (11) is ninety degrees.
6. A passive rolling tube forming device according to claim 1, characterized in that: The inner wall of the through hole (13) is evenly and movably connected with a ball bearing, and the through hole (13) is in contact with the tube via the ball bearing.