Hot extrusion die for producing spiral fin tube
By setting flow-blocking blocks and guide grooves in the hot extrusion die, the problem of uneven aluminum flow at the rotating head was solved, achieving high-quality production of rotor tubes and ensuring stable guidance and rotation of the aluminum flow.
Patent Information
- Application Number
- CN202422792977.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-15
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-11-15
AI Technical Summary
When hot extrusion dies are used to produce gyroscopes, the aluminum flow cannot be properly guided by the rotating head, resulting in uneven flow and making it difficult to combine extrusion and rotation, thus affecting the quality of the finished product.
Design a hot extrusion die including an upper die and a lower die, and set a flow-blocking block and a guide groove to ensure that the aluminum flow flows smoothly into the cavity and maintains a rotating state. Through the cooperation of the flow-diverting bridge and the rotating head, the stable guidance and rotation of the aluminum flow are achieved.
Ensuring smooth and stable aluminum flow at the rotating head enables high-quality hot extrusion production of gyratory tubes and improves forming quality.
Smart Images
Figure CN223571685U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a hot extrusion die for producing a spiral finned tube. BACKGROUND
[0002] The spiral finned tube, also known as a spiral finned tube, as shown in the drawings, is a high-efficiency heat transfer element with spiral fins, and its heat transfer area is several to tens of times that of a bare tube. Figure 6 It has the effects of strengthening heat transfer, reducing flow resistance, and reducing metal consumption, thereby improving the economy and operation reliability of heat exchange equipment, and thus plays an important role in many fields with its unique structure and excellent performance.
[0003] However, when the hot extrusion die produces the spiral finned tube, the aluminum flow cannot be normally guided by the rotating head, and the flow is uneven when passing through the rotating head.
[0004] Therefore, it is necessary to invent a hot extrusion die for producing a spiral finned tube to solve the above problems. INVENTION CONTENTS
[0005] (I) Invention purpose
[0006] To solve the technical problems in the background art, the utility model provides a hot extrusion die for producing a spiral finned tube.
[0007] (II) Technical scheme
[0008] In order to achieve the above purpose, the utility model provides the following technical scheme: a hot extrusion die for producing a spiral finned tube, comprising an upper die and a lower die located at the bottom of the upper die.
[0009] A hole is formed in the top of the upper die, and a shunt bridge is arranged inside the hole.
[0010] The rotating head comprises a column connected with the shunt bridge and a plurality of spiral fins arranged at the end of the column.
[0011] The lower die comprises a welding chamber arranged on the top of the lower die, and a cavity is arranged in the lower die and connected with the welding chamber, and the rotating head is inserted into the cavity and forms a matching gap, which is used for the extrusion production of the finned tube aluminum profile.
[0012] Preferably, the shunt bridge is arranged in a herringbone shape, and the bridge position of the feeding surface of the shunt bridge is rounded.
[0013] Preferably, the number of the rotating fins is eight, and the rotating fins are uniformly and spacedly distributed around the end of the column.
[0014] Preferably, the guide groove is dovetailed at the opening, and the guide groove rotates along the inner fin tube wall of the finned tube aluminum profile for 200mm.
[0015] Preferably, the lower die is further provided with a discharging hole connected with the cavity, and the opening at the top of the discharging hole and the opening at the bottom of the discharging hole are both circular, and the discharging hole is arranged in a horn shape.
[0016] Preferably, the lower die is provided with a flow resistance block at the feeding port of the cavity, and the flow resistance block is arranged in a ring shape.
[0017] Preferably, the upper die and the lower die are tightly matched into a die body through fasteners, and the die body is integrally arranged in a disc shape.
[0018] Compared with the prior art, the beneficial effects of the above technical scheme of the utility model are:
[0019] The flow resistance block is arranged, so that the aluminum flow flowing into the cavity will not be turbulent, and the aluminum flow can be smoothly supplied to the inside of the cavity along the outside of the column, the supply of the rotating fins is ensured, and because the guide groove has a certain angle, the aluminum flow will still be in a rotating state when flowing out along the guide groove due to inertia, so that the aluminum flow can be correctly guided, the aluminum flow is smoothly and stably flowed at the rotating head, and the aluminum flow is forced to rotate along the guide groove, so that the extrusion and rotation can be combined, and then the hot extrusion production of the finned tube aluminum profile is completed, and the forming quality is ensured. BRIEF DESCRIPTION OF DRAWINGS
[0020] In order to more clearly illustrate the technical scheme in the embodiments or the prior art, the drawings needed in the embodiments will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments described in the utility model, and other drawings can be obtained by those skilled in the art according to these drawings.
[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0022] Figure 2The upper die structure schematic view of the utility model;
[0023] Figure 3 The rotating head structure schematic view of the utility model;
[0024] Figure 4 The utility model's explosion map;
[0025] Figure 5 The half sectional view of the lower die of the utility model;
[0026] Figure 6 The schematic view of the finned tube aluminum profile produced by the utility model;
[0027] Figure 7 The rotating schematic view of the inner fin tube wall of the finned tube aluminum profile produced by the utility model.
[0028] Mark explanation:
[0029] 1 upper die, 11 hole, 12 shunt bridge, 13 shunt hole, 14 rotating head, 141 column, 142 rotating fin, 143 guide slot;
[0030] 2 lower die, 21 welding chamber, 22 cavity, 23 discharge hole, 24 resistance block. Specific implementation
[0031] In order to make the technical personnel of the prior art better understand the technical scheme of the utility model, the utility model will be introduced further in the following with the attached drawing.
[0032] The utility model provides a kind of hot extrusion die for producing finned tube as Figures 1-7 It includes upper die 1 and lower die 2 located at the bottom of the upper die 1;
[0033] The upper die 1 top is provided with hole 11, the hole 11 is provided with shunt bridge 12 inside, the hole 11 is spaced out three shunt holes 13 by shunt bridge 12, and the bottom of shunt bridge 12 is provided with rotating head 14;
[0034] The rotating head 14 includes column 141 connected with shunt bridge 12 and a plurality of rotating fins 142 provided at the end of the column 141, and guide slot 143 is spaced between every two rotating fins 142;
[0035] The lower die 2 includes welding chamber 21 opened in the top of lower die 2, and the lower die 2 is provided with cavity 22 communicated with the welding chamber 21 inside, and the rotating head 14 is inserted into cavity 22 to form cooperation gap, for the extrusion production of finned tube aluminum profile.
[0036] In one embodiment, the shunt bridge 12 is arranged in a herringbone shape, so that the three shunt holes 13 are distributed in a triangular shape as a whole, thereby making the aluminum flow more evenly distributed in the upper die 1, so as to ensure that the upper die 1 has high stability in use, and the bridge position of the feeding surface of the shunt bridge 12 is rounded, so that the aluminum flow entering the inside of the upper die 1 is smoother and the transition is smoother, reducing the impact force of the aluminum flow.
[0037] In one embodiment, as shown in Figure 3 and Figure 7 The number of the rotating fin 142 is eight, and is uniformly and spacedly distributed around the end of the column 141, and the opening of the guide groove 143 is dovetailed, so that the aluminum flow flows evenly and stably in the guide groove 143, and the guide groove 143 rotates along the inner fin tube wall of the rotating fin tube aluminum profile for 200 mm, so that the aluminum flow can rotate at the rotating head 14, so that the extrusion and rotation can be combined, thereby greatly reducing the difficulty of extrusion production of the rotating fin tube aluminum profile.
[0038] In one embodiment, the bottom of the lower die 2 is also provided with a discharge hole 23 communicating with the cavity 22, and the top opening and the bottom opening of the discharge hole 23 are both circular, and the discharge hole 23 is arranged in a horn shape, which is convenient for extruding the rotating fin tube aluminum profile after forming, and ensures the integrity of the surface of the rotating fin tube aluminum profile.
[0039] In one embodiment, the lower die 2 is provided with a flow resistance block 24 at the inlet of the cavity 22, and the flow resistance block 24 is arranged in an annular shape and is matched with the cavity 22, which is used for guiding the aluminum flow in the welding chamber 21 to enter the inside of the cavity 22, avoiding the formation of turbulent flow of the aluminum liquid at the cavity 22, so that the aluminum liquid flows more smoothly, and the flow resistance block can also increase the strength of the lower die 2, avoiding the collapse of the cantilever of the lower die 2 by the aluminum flow.
[0040] In one embodiment, the upper die 1 and the lower die 2 are tightly matched into a die body by fasteners, specifically, the fasteners are arranged as pins or bolts, which are convenient for workers to assemble and use the die body, and the die body is arranged in a disc shape and is made of H13 die steel, so that the die body has high strength and long service life.
[0041] In one embodiment, the aluminum flow flows into the inside of the upper die 1 through the hole 11, and is divided into three aluminum flows which flow downward synchronously under the block of the shunt bridge 12, and the overall flow rate is stable, thereby reducing the impact force on the upper die 1, further, the three aluminum flows are fused again in the welding chamber 21 and continue to flow downward into the cavity 22, and are extruded in the cooperation gap formed by the rotating head 14 and the cavity 22, thereby forming the rotating fin tube aluminum profile, and finally being discharged through the discharge hole 23, thereby completing the hot extrusion production of the rotating fin tube.
[0042] Specifically, when the aluminum flow reaches the inside of the welding chamber 21 and is fused again, it will continue to flow towards the inside of the cavity 22, at this time the flow block 24 will preliminarily guide the aluminum flow, and the aluminum flow will not form a turbulent flow at the opening of the cavity 22, and can smoothly flow into the cavity 22, so that the aluminum flow can directly flow down the column 141 to the spin fin 142, ensuring that the spin fin 142 is supplied with sufficient material, at this time, the aluminum flow will flow down the guide groove 143, and since the guide groove 143 has a certain angle, specifically, the guide groove 143 rotates one revolution along the inner fin tube wall of the spin fin tube aluminum profile 200mm, so that the aluminum flow flowing along the guide groove 143 is still in a rotating state when flowing out of the guide groove 143 due to inertia, and forms a spin fin tube with rotating fins on the inner wall in the cooperation gap, realizing correct guidance of the aluminum flow, ensuring smooth and stable flow of the aluminum flow at the spin head 14, and enabling the aluminum flow to rotate along the guide groove 143, so that the extrusion and rotation of the aluminum flow can be combined, realizing hot extrusion production of the spin fin tube aluminum profile, and ensuring the forming quality thereof.
[0043] The embodiment specifically solves the problem in the prior art that the aluminum flow cannot be normally guided by the spin head 14 when producing the spin fin tube, flows unevenly when passing through the spin head 14, and it is difficult to combine extrusion and rotation of the aluminum flow, resulting in low finished product quality of the spin fin tube.
[0044] The above only describes some exemplary embodiments of the present application by way of illustration, and it is needless to say that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present application. Therefore, the above drawings and descriptions are illustrative in nature and should not be understood as limiting the scope of protection of the claims of the present application.
Claims
1. A hot extrusion die for producing a spin finned tube, characterized by: Including upper die (1), and the lower die (2) at the bottom of the upper die (1); The upper die (1) top is provided with a hole (11), the hole (11) is provided with a shunt bridge (12), the hole (11) is separated into three shunt holes (13) by shunt bridge (12), the bottom of shunt bridge (12) is provided with a rotating head (14); The rotating head (14) includes a column (141) connected with the shunt bridge (12), and a plurality of rotating fins (142) are arranged at the end of the column (141), and a guide groove (143) is arranged between every two rotating fins (142). The lower die (2) includes a welding chamber (21) opened at the top of the lower die (2), and a cavity (22) is opened in the lower die (2) and communicates with the welding chamber (21), and a cooperating gap is formed after the rotating head (14) is inserted into the cavity (22), which is used for the extrusion production of the rotating finned tube aluminum profile.
2. A hot extrusion die for producing a spin finned tube according to claim 1, characterized in that: The shunt bridge (12) is set as a herringbone shape, and the bridge position of the feeding surface of the shunt bridge (12) is rounded.
3. A hot extrusion die for producing a spin finned tube according to claim 1, characterized in that: The number of rotating fins (142) is eight, and they are uniformly distributed around the end of the column (141).
4. A hot extrusion die for producing a spin fin tube according to claim 1, characterized in that: The opening of the guide groove (143) is dovetailed, and the guide groove (143) rotates one circle along the inner finned tube wall of the rotating finned tube aluminum profile.
5. A hot extrusion die for producing a spin fin tube according to claim 1, characterized in that: The bottom of the lower die (2) is also provided with a discharge hole (23) which communicates with the cavity (22), and the top opening and the bottom opening of the discharge hole (23) are both circular, and the discharge hole (23) is set as a horn shape.
6. A hot extrusion die for producing a spin fin tube according to claim 1, characterized in that: The lower die (2) is provided with a flow resistance block (24) at the feeding port of the cavity (22), and the flow resistance block (24) is set as a ring shape.
7. A hot extrusion die for producing a spin fin tube according to claim 1, characterized in that: The upper die (1) and the lower die (2) are tightly matched into a die body by fasteners, and the die body is set as a disc shape as a whole.