Aluminum pipe forming mechanism

Abstract

The invention discloses an aluminum pipe forming mechanism, and relates to the technical field of pipe production, the aluminum pipe forming mechanism comprises a plurality of pairs of horizontal forming wheels, and each pair of horizontal forming wheels comprises an upper forming wheel and a lower forming wheel; a forming gap is formed between the upper forming wheel and the lower forming wheel, an inner pipe cavity is formed in the upper forming wheel, a plastic inner pipe penetrates into the inner pipe cavity, the inner pipe cavity is communicated with the forming gap, and the aluminum strip bears the plastic inner pipe in the process of gradually bending and deforming upwards; the aluminum strip forming device has the beneficial effects that an aluminum strip sequentially passes through the horizontal forming module and the vertical forming module to be gradually formed into an aluminum pipe; the inner pipe cavity is formed, the plastic inner pipe can penetrate into the inner pipe cavity, conveying is carried out through friction force among the upper forming wheel, the aluminum strip and the plastic inner pipe, in the process that the aluminum strip is gradually formed into the aluminum pipe, the aluminum strip can gradually wrap the plastic inner pipe, then the aluminum strip and the plastic inner pipe are matched to form the aluminum-plastic composite pipe, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of tube production, and more specifically, to an aluminum tube forming mechanism. Background Art

[0002] During the processing of aluminum-plastic composite pipes, it is necessary to carry out molding processing of aluminum pipes and plastic inner pipes (outer aluminum pipes and inner plastic inner pipes). First, the plastic is molded into a plastic inner pipe, and then the aluminum strip is processed into an aluminum pipe. Finally, the aluminum pipe is sleeved on the plastic inner pipe through a sleeve process to form an aluminum-plastic composite pipe. However, this production process is slow and has low production efficiency. Summary of the invention

[0003] The object of the present invention is to provide an aluminum tube forming mechanism to solve the problems raised in the above background technology.

[0004] The present invention is achieved through the following technical solutions.

[0005] An aluminum tube forming mechanism comprises a horizontal forming module and a vertical forming module arranged in sequence along the transmission direction of an aluminum strip, wherein the aluminum strip is formed into an aluminum tube by passing through the vertical forming module and the horizontal forming module in sequence, wherein the vertical forming module comprises a plurality of opposed forming wheels, and each pair of the vertical forming wheels comprises an upper forming wheel and a lower forming wheel; A forming gap is provided between the upper forming wheel and the lower forming wheel for the aluminum strip to pass through. When the aluminum strip passes through the forming gap, it is squeezed by the upper forming wheel and the lower forming wheel and gradually bends upward on both sides; The upper forming wheel is provided with an inner tube cavity, into which the plastic inner tube is inserted, and the inner tube cavity is communicated with the forming gap, and the aluminum strip wraps around the plastic inner tube during the process of gradually bending and deforming upwards.

[0006] As a further improvement of the present invention, the outer wall of the lower forming wheel is provided with an extrusion groove, the upper forming wheel is adapted to be inside the extrusion groove, the forming gap is located between the extrusion groove and the upper forming wheel, and the aluminum strip is extruded between the outer edge of the upper forming wheel and the extrusion groove.

[0007] As a further improvement of the present invention, the width of the extrusion groove of each lower forming wheel decreases successively along the forming direction, and the width of the outer edge of each upper forming wheel decreases successively along the forming direction.

[0008] As a further improvement of the present invention, the inner tube cavity is arranged at a middle position of the outer edge of the upper forming wheel.

[0009] As a further improvement of the present invention, a butt-top portion is provided in the middle portion of the bottom surface of the extrusion groove, and the butt-top portion is arched outward in an arc shape. The butt-top portion is used to butt the plastic inner tube so that the plastic inner tube and the wall of the inner tube cavity maintain a butt-top state, thereby cooperating with the lower forming wheel to drive the plastic inner tube to move forward following the aluminum strip when the upper forming wheel rotates.

[0010] As a further improvement of the present invention, the horizontal forming module includes several pairs of horizontal forming wheels, each of which has an extrusion groove on its outer wall, and the extrusion grooves between each pair of horizontal forming wheels are relatively arranged to form an extrusion cavity, through which the aluminum strip passes to be formed into an aluminum tube.

[0011] As a further improvement of the present invention, the bottoms of the extrusion chambers are of the same height, and a closing opening is formed at the upper end of the extrusion chamber, and the closing opening decreases successively along the forming direction.

[0012] As a further improvement of the present invention, at least one group of inner tube pressing wheels is arranged on the vertical mold forming module, and the inner tube pressing wheels are pressed onto the plastic inner tube.

[0013] As a further improvement of the present invention, the inner tube pressing wheel comprises a first pressing wheel, and the wheel surface of the first pressing wheel is provided with an inwardly concave arc surface, and the arc surface is adapted to the plastic inner tube.

[0014] As a further improvement of the present invention, the inner tube pressing wheel comprises a second pressing wheel, and the wheel surface of the second pressing wheel is provided with an outwardly protruding abutting platform, and the abutting platform is used to abut against the outer wall of the plastic inner tube.

[0015] Beneficial effects of the present invention: 1. In the present invention, the aluminum strip is gradually formed into an aluminum tube by passing through a vertical forming module and a horizontal forming module in sequence; and an inner tube cavity is provided, into which a plastic inner tube can be inserted, and is transported through the friction between the upper forming wheel, the aluminum strip and the plastic inner tube. In the process of the aluminum strip being gradually formed into the aluminum tube, the aluminum strip will gradually cover the plastic inner tube, so that the aluminum strip and the plastic inner tube are formed into an aluminum-plastic composite tube in cooperation, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to help understand the purpose and advantages of the present invention, wherein: Figure 1 It is a schematic diagram of the structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a vertical molding module in an embodiment of the present invention; Figure 3 is a schematic diagram of the inner lumen structure in an embodiment of the present invention; Figure 4 It is a schematic diagram of the side structure of a horizontal forming module in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of a horizontal forming module in an embodiment of the present invention; Figure 6 It is a schematic diagram of the structure of the horizontal forming wheel in an embodiment of the present invention.

[0017] Numbers in the figure: vertical forming module 1, upper forming wheel 101, lower forming wheel 102, forming gap 103, extrusion groove 104, inner tube cavity 105, abutment top 106, horizontal forming module 2, horizontal forming wheel 201, extrusion groove 202, extrusion cavity 203, closing 204, circular chamber 205, aluminum strip 3, plastic inner tube 4, first pressing wheel 5, second pressing wheel 6, arc surface 501, abutment top platform 601, welding unit 7. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below based on the accompanying drawings and implementation examples.

[0019] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. The words "inside" and "outside" refer to the direction toward or away from the geometric center of a specific component, respectively. They are relative concepts, and therefore may change accordingly according to different locations and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0020] refer to Figures 1 to 6 , the embodiments of the present invention disclose: An aluminum tube forming mechanism includes a horizontal forming module 2, a vertical forming module 1 and a welding unit 7 arranged in sequence along the transmission direction of the aluminum strip (the welding unit 7 is a prior art and has not been improved in the present application, so it will not be described in detail herein). The aluminum strip 3 is formed into an aluminum tube by passing through the vertical forming module 1 and the horizontal forming module 2 in sequence.

[0021] The vertical forming module 1 includes a plurality of vertical forming wheels, each pair of the vertical forming wheels includes an upper forming wheel 101 and a lower forming wheel 102; a forming gap 103 is provided between the upper forming wheel 101 and the lower forming wheel 102 for the aluminum strip 3 to pass through, and when the aluminum strip 3 passes through the forming gap 103, it is squeezed by the upper forming wheel 101 and the lower forming wheel 102 and gradually bends upward on both sides; specifically, in this embodiment, an extrusion groove 104 is provided on the outer wall of the lower forming wheel 102, the upper forming wheel 101 is adapted to be inside the extrusion groove 104, the forming gap 103 is located between the extrusion groove 104 and the upper forming wheel 101, and the aluminum strip 3 is extruded and formed between the outer edge of the upper forming wheel 101 and the extrusion groove 104; the extrusion grooves 104 of each of the lower forming wheels 102 The width decreases successively along the forming direction, and the width of the outer edge of each upper forming wheel 101 decreases successively along the conveying direction of the aluminum strip. The initial width of the extrusion groove 104 is adapted to the aluminum strip 3 for the aluminum strip 3 to penetrate. At the same time, the width of the extrusion groove 104 decreases along the forming direction, and the corresponding outer edge width of the upper forming wheel 101 also decreases successively along the conveying direction of the aluminum strip. This makes the aluminum strip 3 squeezed by the upper forming wheel 101 and the lower forming wheel 102 during the conveying process, and the two sides of the aluminum strip 3 gradually bend upward (there is a gap between the groove wall of the extrusion groove 104 and the upper forming wheel 101, and the two sides of the aluminum strip 3 are bent toward the gap when squeezed), and gradually adapt to the wheel width of the upper forming wheel 101, so that the aluminum strip 3 is finally formed into a U-shaped aluminum strip 3 with both sides bent upward when it completely passes through the vertical forming module 1.

[0022] At the same time, in the present embodiment, an inner tube cavity 105 is provided on the upper forming wheel 101, and the inner tube cavity 105 is for the plastic inner tube 4 to penetrate, and the inner tube cavity 105 is communicated with the forming gap 103, and the aluminum strip 3 wraps the plastic inner tube 4 in the process of gradually bending and deforming upward. Specifically, the inner tube cavity 105 is arranged in the middle position of the outer edge of the upper forming wheel 101, and in the present embodiment, the inner tube cavity 105 of each upper forming wheel 101 is the same size, and the wheel width of the upper forming wheel 101 gradually decreases along the forming direction, and the inner tube cavity 105 is communicated with the forming gap 103, so that during the conveying process of the aluminum strip 3, the lower end of the plastic inner tube 4 always keeps in contact with the upper end surface of the middle part of the aluminum strip 3, that is, the aluminum strip 3 always presses against the bottom of the plastic inner tube 4 in the process of gradually forming into a U-shaped structure.

[0023] In this embodiment, the plastic inner tube 4 needs to be driven by the upper forming wheel 101 and the lower forming wheel 102 to be transported in the forming direction. However, since the aluminum strip 3 is located at the lower side of the plastic inner tube 4, the plastic inner tube 4 cannot directly contact the lower forming wheel 102, that is, the aluminum strip 3 needs to cooperate with the upper forming wheel 101 to drive the plastic inner tube 4 to move in the forming direction. The surface of the aluminum strip 3 is usually smooth, and it is easy to slip with the plastic inner tube 4, resulting in an error between the plastic inner tube 4 and the aluminum strip 3 (the plastic inner tube 4 needs to be The inner tube 4 is conveyed at the same speed as the aluminum strip 3, but the plastic inner tube 4 is conveyed at a slower speed than the aluminum strip 3 due to slippage. At the same time, during the conveying process, the plastic inner tube 4 naturally falls under the influence of gravity, so that the upper end surface of the plastic inner tube 4 will not maintain abutment with the wall of the inner tube cavity 105, thereby causing slippage between the plastic inner tube 4 and the upper forming wheel 101. Based on this, an abutment top portion 106 is provided in the middle of the bottom surface of the extrusion groove 104, and the abutment top portion 106 is arched outward in an arc shape. The upper forming wheel 101 is used to abut the plastic inner tube 4 so that the plastic inner tube 4 and the wall of the inner tube cavity 105 are kept in an abutting state, so that when the upper forming wheel 101 rotates, it cooperates with the lower forming wheel 102 to drive the plastic inner tube 4 to move forward with the aluminum strip 3; specifically, the abutting top 106 is arched upward in an arc shape, and when the upper forming wheel 101 and the lower forming wheel 102 squeeze the aluminum strip 3 against each other, the aluminum strip 3 also has a part that arches upward in an arc shape, and the position of the abutting top 106 corresponds to the inner tube cavity 105, that is, the aluminum strip 3 is upward. The arched part abuts against the plastic inner tube 4, so that the upper end surface of the plastic inner tube 4 abuts against the wall of the inner tube cavity 105, so that the aluminum strip 3, the plastic inner tube 4 and the upper forming wheel 101 are closely fitted to each other, thereby increasing the force-bearing area of ​​the plastic inner tube 4 to avoid slipping between the plastic inner tube 4 and the aluminum strip 3 and the upper forming wheel 101, so that the upper forming wheel 101 can synchronously drive the plastic inner tube 4 to move in the forming direction during the process of rotating and conveying the aluminum strip 3, thereby reducing the error formed between the plastic inner tube 4 and the aluminum strip 3.

[0024] In the above description, both sides of the aluminum strip 3 can only be bent and deformed upward to form an aluminum strip 3 with a U-shaped structure, and the plastic inner tube 4 is located between the U-shaped aluminum strips 3, and the upper end thereof does not realize the closing 204 to form an aluminum tube shape. Based on this, a horizontal forming module 2 is provided in the present embodiment, and specifically, the horizontal forming module 2 includes a plurality of pairs of horizontal forming wheels 201, and the outer wall of each of the horizontal forming wheels 201 is provided with an extrusion groove 202, and the extrusion grooves 202 between each pair of horizontal forming wheels 201 are relatively arranged to form an extrusion cavity 203, and the extrusion cavity 203 is for the aluminum strip 3 to pass through to be formed into an aluminum tube; Figure 6As shown, in this embodiment, the bottoms of the extrusion chambers 203 are of equal height, and a closing opening 204 is formed at the upper end of the extrusion chamber 203. The closing opening 204 is gradually reduced along the forming direction and finally reduced to 0. The corresponding extrusion chamber 203 is gradually formed from a U-shaped chamber with a closing opening 204 to a closed circular chamber 205, and the cross-sectional diameter of the circular chamber 205 is adapted to the outer diameter of the aluminum tube to be formed in this embodiment. The U-shaped aluminum strip 3 carrying the plastic inner tube 4 is inserted into each pair of the horizontal forming wheels 201. During the conveying process, the edge side of the aluminum strip 3 is squeezed by the horizontal forming wheels 201 (extrusion groove 202) on both sides, and gradually approaches the closing opening inward. The aluminum strips 3 are gathered together and finally formed into a round tube shape, while wrapping the plastic inner tube 4; in this process, the aluminum tube is slowly extruded and deformed for many times, rather than completing all the extrusion deformation at one time, thereby ensuring the processing quality of the aluminum tube; finally, the horizontal forming module 2 outputs the round tube-shaped aluminum strip 3 wrapped with the plastic inner tube 4, and then the edges of the aluminum strips 3 that are close to each other are welded by the welding unit 7, thereby forming an aluminum tube wrapped with the plastic inner tube 4; through the above arrangement, the aluminum strip 3 passes through the vertical forming module 1 and the horizontal forming module 2 in sequence and is gradually formed into an aluminum tube, and then is formed into an aluminum-plastic composite tube, thereby improving the production efficiency.

[0025] During the transportation process, the plastic inner tube 4 may be deformed, and the plastic inner tube 4 may be separated from the aluminum strip 3 of the U-shaped structure (in the vertical forming module 1, the plastic inner tube 4 is pressed by the upper forming wheel 101, and in the process of being transported from the vertical forming module 1 to the horizontal forming module 2, the plastic inner tube 4 is no longer pressed, that is, at this time the plastic inner tube 4 may bend and deform upward and separate from the aluminum strip 3). Based on this, in this embodiment, at least one group of inner tube pressing wheels is provided on the vertical molding module, and the inner tube pressing wheels are pressed onto the plastic inner tube 4; the inner tube pressing wheels include a first pressing wheel 5, and the wheel surface of the first pressing wheel 5 is provided with an inwardly concave arc surface 501, and the arc surface 501 is adapted to the plastic inner tube 4. During the transportation process, the first pressing wheel 5 The aluminum strip 3 that enters downward into the U-shaped structure has its first pressing wheel 5 wheel surface abutting against the plastic inner tube 4, thereby limiting the displacement of the plastic inner tube 4; at the same time, as the two sides of the aluminum strip 3 gradually close together, the closing opening 204 of the aluminum strip 3 with the U-shaped structure gradually decreases, which makes the first pressing wheel 5 no longer suitable for pressing tightly in the aluminum strip 3 with the U-shaped structure during the setting process along the forming direction. Therefore, in the present embodiment, the inner tube pressing wheel includes a second pressing wheel 6, and the wheel surface of the second pressing wheel 6 is provided with an outwardly protruding abutting platform 601, and the abutting platform 601 is used to abut against the outer wall of the plastic inner tube 4. The width of the abutting platform 601 is smaller than the wheel surface width. Therefore, it can adapt to the aluminum strip 3 with a smaller closing opening 204 to press the plastic inner tube 4, thereby improving the product molding quality.

[0026] Finally, it should be noted that the above implementation cases are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned implementation cases, those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned implementation cases, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the implementation cases of the present invention.

Claims

1. An aluminum tube forming mechanism, comprising a horizontal forming module (2) and a vertical forming module (1) arranged in sequence along the aluminum strip transmission direction, characterized in that: The vertical forming module (1) comprises a plurality of vertical forming wheels, each pair of the vertical forming wheels comprising an upper forming wheel (101) and a lower forming wheel (102); A forming gap (103) is provided between the upper forming wheel (101) and the lower forming wheel (102) to allow the aluminum strip (3) to pass through. When the aluminum strip (3) passes through the forming gap (103), the two sides of the aluminum strip (3) are squeezed by the upper forming wheel (101) and the lower forming wheel (102) to gradually bend upwards and deform; The upper forming wheel (101) is provided with an inner tube cavity (105), the inner tube cavity (105) is for the plastic inner tube (4) to penetrate, the inner tube cavity (105) is connected to the forming gap (103), and the aluminum strip (3) wraps around the plastic inner tube (4) during the process of gradually bending and deforming upwards.

2. The aluminum tube forming mechanism according to claim 1, characterized in that: The outer wall of the lower forming wheel (102) is provided with an extrusion groove (104), the upper forming wheel (101) is adapted to fit within the extrusion groove (104), the forming gap (103) is located between the extrusion groove (104) and the upper forming wheel (101), and the aluminum strip (3) is extruded and formed between the outer edge of the upper forming wheel (101) and the extrusion groove (104).

3. The aluminum tube forming mechanism according to claim 2, characterized in that: The width of the extrusion groove (104) of each lower forming wheel (102) decreases successively along the conveying direction of the aluminum strip, and the width of the outer edge of each upper forming wheel (101) decreases successively along the conveying direction of the aluminum strip.

4. The aluminum tube forming mechanism according to claim 1, characterized in that: The inner tube cavity (105) is arranged at the middle position of the outer edge of the upper forming wheel (101).

5. The aluminum tube forming mechanism according to claim 3, characterized in that: A stopper (106) is provided in the middle of the bottom surface of the extrusion groove (104), and the stopper (106) is arched outwards in an arc shape. The stopper (106) is used to stop the plastic inner tube (4) so ​​that the plastic inner tube (4) and the wall of the inner tube cavity (105) are kept in a stopper state, so that when the upper forming wheel (101) rotates, it cooperates with the lower forming wheel (102) to drive the plastic inner tube (4) to move forward following the aluminum strip (3).

6. The aluminum tube forming mechanism according to claim 1, characterized in that: The horizontal forming module (2) comprises a plurality of pairs of horizontal forming wheels (201), each of the horizontal forming wheels (201) being provided with an extrusion groove (202) on its outer wall, the extrusion grooves between each pair of horizontal forming wheels (201) being arranged relative to each other to form an extrusion cavity (203), the extrusion cavity (203) being used for the aluminum strip (3) to pass through so as to be formed into an aluminum tube.

7. The aluminum tube forming mechanism according to claim 6, characterized in that: The bottoms of the extrusion cavities (203) are of the same height, and a closing opening (204) is formed at the upper end of the extrusion cavity (203), and the closing opening (204) decreases in size along the molding direction.

8. The aluminum tube forming mechanism according to claim 1, characterized in that: At least one set of inner tube pressing wheels is arranged on the vertical mold forming module, and the inner tube pressing wheels are pressed onto the plastic inner tube (4).

9. The aluminum tube forming mechanism according to claim 8, characterized in that: The inner tube pressing wheel comprises a first pressing wheel (5), the wheel surface of the first pressing wheel (5) being provided with an inwardly recessed arc surface (501), the arc surface (501) being adapted to the plastic inner tube (4).

10. The aluminum tube forming mechanism according to claim 8, characterized in that: The inner tube pressing wheel comprises a second pressing wheel (6), the wheel surface of the second pressing wheel (6) being provided with an outwardly protruding abutting platform (601), the abutting platform (601) being used to abut against the outer wall of the plastic inner tube (4).

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