Aluminum pipe drawing lubricating structure

Abstract

The utility model discloses an aluminum pipe drawing lubricating structure which is characterized in that an aluminum pipe channel is formed in a gland, a drawing die head is arranged in the aluminum pipe channel, a fixing ring is adopted to be connected with the gland, a lubricating inner cavity is formed in the fixing ring to be connected with the aluminum pipe channel, and a plurality of oil inlet holes communicated with the lubricating inner cavity are distributed in the fixing ring. The aluminum pipe, the aluminum pipe channel and the lubricating inner cavity are matched to form a lubricating oil closed space, meanwhile, the multiple oil inlet holes are matched with the lubricating inner cavity to form multi-way lubrication, the situation that the lubricating oil flow is affected due to reduction of the viscosity of the lubricating oil is avoided, in the drawing process, the lubricating oil preliminarily forms a lubricating oil film on the surface of the aluminum pipe, and the aluminum pipe enters the lubricating inner cavity after reducing; lubricating oil secondarily forms a lubricating oil film on the surface of the aluminum pipe under the action of drawing force, the aluminum pipe is effectively protected, meanwhile, under the action of drawing force, the lubricating oil is sealed in the aluminum pipe channel and the lubricating inner cavity and covers the surface of the aluminum pipe, oil-immersed lubrication is formed, and the lubricating effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of aluminum tube processing technology, specifically to aluminum tube drawing lubrication technology. Background Technology

[0002] The multi-pass drawing process for seamless aluminum tubes mainly adopts the floating mandrel drawing process. The aluminum tube passes through the drawing die and is squeezed to achieve the diameter change of the aluminum tube. During the drawing process, lubricating oil is usually sprayed between the drawing die and the aluminum tube to reduce wear, prevent scratches on the aluminum tube and the drawing die, and increase the surface brightness of the aluminum tube.

[0003] In existing aluminum tube drawing processes, perforated spray lubricating oil paths are typically configured on the drawing die to form a single-path lubrication between the drawing die and the aluminum tube. However, during continuous production and drawing, the viscosity of the lubricating oil continuously decreases, causing the lubricating oil sprayed onto the surface of the aluminum tube to be rapidly lost. This reduces the effective flow rate of lubricating oil, significantly diminishing the lubrication effect. Ultimately, this leads to surface streaking, copper adhesion, and dry drawing phenomena on the aluminum tube, reducing the service life of the drawing die and severely impacting the quality of the aluminum tube and production costs.

[0004] Therefore, how to reduce the viscosity of the lubricating oil without affecting the flow rate and effectively improve the lubrication effect of aluminum tube drawing has become an urgent problem to be solved in this field. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an aluminum tube drawing lubrication structure that is not easily affected by the decrease in lubricating oil viscosity and has a good lubrication effect.

[0006] To achieve the above objectives, the aluminum tube drawing lubrication structure provided by this utility model is used to cooperate with the aluminum tube, including...

[0007] A pressure cap, wherein an aluminum tube channel is formed within the pressure cap to accommodate the aluminum tube, and a drawing die is provided in the aluminum tube channel.

[0008] A retaining ring is connected to the pressure cap and has a lubrication cavity inside that communicates with the aluminum tube channel. The retaining ring has several oil inlet holes that communicate with the lubrication cavity.

[0009] Furthermore, the pressure cap is configured in an annular shape, and the fixing ring is adapted to the pressure cap.

[0010] Furthermore, the aluminum tube channel and the lubrication cavity are configured as a cylindrical cavity.

[0011] Furthermore, the aluminum tube channel includes a drawing channel and a diameter-changing channel. The drawing channel is located at the end of the gland that mates with the aluminum tube, and the diameter-changing channel is located at the end of the gland that mates with the retaining ring.

[0012] Furthermore, the drawing die is disposed in the drawing channel, the diameter of the drawing channel is larger than the diameter of the aluminum tube before the diameter change, and the diameter of the diameter change channel is adapted to the diameter of the aluminum tube after the diameter change.

[0013] Furthermore, the diameter of the lubrication cavity is larger than the diameter of the drawing channel and the diameter-changing channel.

[0014] Furthermore, the pressure cap and the retaining ring are configured to be detachably connected.

[0015] Furthermore, the oil inlet holes are symmetrically distributed on the fixing ring.

[0016] The aluminum tube drawing lubrication structure provided by this utility model forms an aluminum tube channel inside the pressure cap, and sets the drawing die head in the aluminum tube channel. At the same time, a fixing ring is used to connect the pressure cap, and a lubrication inner cavity is formed in the fixing ring to connect the aluminum tube channel. Several oil inlet holes are distributed on the fixing ring to connect the lubrication inner cavity, so that the aluminum tube, the aluminum tube channel and the lubrication inner cavity cooperate to form a closed space for lubricating oil. At the same time, the several oil inlet holes cooperate with the lubrication inner cavity to form multi-path lubrication.

[0017] Thus, after the aluminum tube is lubricated, it enters the aluminum tube channel and is squeezed and reduced in diameter by the drawing die. During the drawing process, the lubricating oil will initially form a lubricating oil film on the surface of the aluminum tube. After the aluminum tube is reduced in diameter, it enters the lubrication cavity and is supplied with lubricating oil through several oil inlet holes. Under the action of the drawing force, the lubricating oil forms a lubricating oil film on the surface of the aluminum tube for the second time, which effectively protects the aluminum tube.

[0018] At the same time, under the action of the pulling force, the lubricating oil is sealed in the aluminum tube channel and the lubrication cavity, and covers the surface of the aluminum tube to form oil-immersed lubrication, so as to improve the lubrication effect and prevent the air from entering, making the viscosity of the lubricating oil less likely to decrease.

[0019] Furthermore, by supplying oil through multiple oil inlets, multi-path lubrication is formed, which does not affect the flow rate of lubricating oil due to the decrease in lubricating oil viscosity, thereby improving the lubrication effect. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] Figure 1 A schematic diagram of an embodiment of the aluminum tube drawing lubrication structure provided by this utility model;

[0022] Figure 2 A side view schematic diagram of Embodiment 1 of the aluminum tube drawing lubrication structure provided by this utility model;

[0023] Figure 3Schematic diagrams of embodiments two to four of the aluminum tube drawing lubrication structure provided by this utility model;

[0024] Figure 4 The diagrams show the cooperation between the aluminum tube drawing lubrication structure provided by this utility model in Embodiments 2 to 4 and the aluminum tube.

[0025] Figure label:

[0026] 1. Gland; 11. Aluminum tube channel; 111. Pulling channel; 112. Variable diameter channel; 113. Inlet;

[0027] 2. Retaining ring; 21. Lubrication cavity; 211. Outlet; 22. Oil inlet;

[0028] 3. Aluminum tube; 4. Sealing ring. Detailed Implementation

[0029] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0030] Example 1

[0031] See Figure 1 The diagram shows an example of an aluminum tube drawing lubrication structure provided by this utility model.

[0032] As shown in the figure, the aluminum tube drawing lubrication structure in this example is used to cooperate with the aluminum tube 3, and mainly includes the pressure cap 1 and the retaining ring 2.

[0033] The pressure cap 1 has an aluminum tube channel 11 that can accommodate the aluminum tube 3. A drawing die 12 is provided in the aluminum tube channel 11. The fixing ring 2 is connected to the pressure cap 1 and has a lubrication cavity 21 that communicates with the aluminum tube channel 11. The fixing ring 2 has a number of oil inlet holes 22 that communicate with the lubrication cavity 21 to form multi-channel lubrication. During the drawing process, the lubricating oil forms a lubricating oil film twice on the surface of the aluminum tube 3 under the action of the drawing force, and seals the lubricating oil in the aluminum tube channel 11 and the lubrication cavity 21 to achieve oil immersion lubrication. It is not easily affected by the decrease in the viscosity of the lubricating oil and improves the lubrication effect.

[0034] The pressure cap 1 is configured as a ring, and the fixing ring 2 is adapted to the pressure cap 1, so that the pressure cap 1 and the fixing ring 2 can be connected to form a compact whole.

[0035] Preferably, the pressure cap 1 and the fixing ring 2 are configured to be detachably connected, so that the pressure cap 1 can be separated from the fixing ring 2, which facilitates the installation and maintenance of the pressure cap 1 and the fixing ring 2.

[0036] Furthermore, an aluminum tube channel 11 is formed in the cap 1, and a drawing die 12 is provided on the aluminum tube channel 11, so that the aluminum tube 3 first enters the aluminum tube channel 11 of the cap 1, and after being squeezed and reduced in diameter by the drawing die 12, it enters the lubrication cavity 21 of the fixing ring 2, thereby realizing the drawing and forming of the aluminum tube 3.

[0037] During this process, the aluminum tube 3 is lubricated in advance before entering the aluminum tube channel 11. The aluminum tube channel 11 and the aluminum tube 3 cooperate to form a cavity. As the aluminum tube 3 is pulled, a pulling force is generated in the aluminum tube channel 11 to increase the pressure in the aluminum tube channel 11. The pressure acts on the lubricating oil, so that the lubricating oil stably covers the surface of the aluminum tube 3, and a lubricating oil film is initially formed on the surface of the aluminum tube 3.

[0038] Combination Figure 2 In order to ensure that the decrease in lubricating oil viscosity does not affect the lubricating oil flow rate and lubrication effect of aluminum tube 3, a lubricating inner cavity 21 communicating with aluminum tube channel 11 is formed inside the fixing ring 2, and several oil inlets 22 communicating with the lubricating inner cavity 21 are distributed on the fixing ring 2, so that the oil inlets 22 can deliver lubricating oil to the lubricating inner cavity 21 and aluminum tube channel 11, increase the lubricating oil flow rate, and are not affected by the decrease in lubricating oil viscosity.

[0039] Specifically, the lubrication cavity 21 is connected to the aluminum tube channel 11, and the diameter of the lubrication cavity 21 is larger than the diameter of the aluminum tube channel 11, so that the aluminum tube 3 enters the lubrication cavity 21 after passing through the pressure cap 1. The lubrication cavity 21 and the aluminum tube 3 cooperate to form a cavity with a larger space, which facilitates the secondary formation of the lubricating oil film.

[0040] Furthermore, several oil inlets 22 deliver lubricating oil to the lubrication cavity 21, and the aluminum tube 3 simultaneously undergoes a pulling motion. The resulting pulling force acts on the surface of the aluminum tube 3 again, and together with the increased pressure of the lubrication cavity 21, it covers the surface of the aluminum tube 3 with lubricating oil, forming a secondary lubricating oil film on the surface of the aluminum tube 3. This not only increases the flow rate of lubricating oil but also improves the lubrication effect.

[0041] Combination Figure 2 Specifically, a number of oil inlet holes 22 are symmetrically distributed on the fixed ring 2. In this example, there are four oil inlet holes 22, which are symmetrically distributed on the fixed ring 2 and connected to the lubrication cavity 21, so that the lubricating oil enters the lubrication cavity 21 symmetrically to lubricate the aluminum tube 3 and further improve the uniformity of lubricating oil coverage.

[0042] Meanwhile, several oil inlets 22 cooperate with the lubrication cavity 21 to form multi-channel lubrication, which can increase the flow rate of lubricating oil and is not affected by the decrease in lubricating oil viscosity.

[0043] Example 2

[0044] Combination Figure 3 and Figure 4Based on Embodiment 1, the aluminum tube channel 11 inside the pressure cap 1 includes a drawing channel 111 and a variable diameter channel 112. The drawing channel 111 and the variable diameter channel 112 are integrally formed and cooperate to realize the drawing and forming of the aluminum tube 3, while facilitating the initial formation of a lubricating oil film on the surface of the aluminum tube 3.

[0045] Specifically, the drawing channel 111 is located at the end where the pressure cap 1 mates with the aluminum tube 3, and the diameter changing channel 112 is located at the end where the pressure cap 1 mates with the fixing ring 2. The drawing die 12 is set in the drawing channel 111, so that the aluminum tube 3 first enters the drawing channel 111, and after being squeezed and changed in diameter by the drawing die 12, it enters the diameter changing channel 112, thereby realizing the drawing and forming of the aluminum tube 3.

[0046] Furthermore, the diameter of the drawing channel 111 is larger than the diameter of the aluminum tube 3 before the diameter change, and the diameter of the diameter change channel 112 is matched with the diameter of the aluminum tube 3 after the diameter change, so that the aluminum tube 3 is lubricated in advance before entering the drawing channel 111. The drawing channel 111 and the aluminum tube 3 cooperate to form a cavity. As the aluminum tube 3 is drawn, a drawing force is generated in the drawing channel 111 to enhance the pressure in the drawing channel 111. The pressure acts on the lubricating oil, so that the lubricating oil stably covers the surface of the aluminum tube 3, and a lubricating oil film is initially formed on the surface of the aluminum tube 3.

[0047] Next, the aluminum tube 3 is extruded and its diameter is reduced by the drawing die 12, and then it enters the diameter-reducing channel 112. Since the diameter of the diameter-reducing channel 112 is matched with the diameter of the aluminum tube 3 after the diameter reduction, the diameter-reducing channel 112 can closely contact the lubricating oil film on the surface of the aluminum tube 3. The aluminum tube 3 continues to be drawn, and the drawing force generated can match the contact pressure of the diameter-reducing channel 112 on the lubricating oil film, ensuring that the lubricating oil film is stably and evenly covered on the surface of the aluminum tube 3, thereby effectively reducing the friction between the aluminum tube 3 and the diameter-reducing channel 112 and improving the lubrication effect.

[0048] Furthermore, the cap 1 is made of a hard alloy annular cap, and the entrance 113 of the drawing channel 111 is configured to match the diameter of the aluminum tube 3 before the diameter change, so that when the aluminum tube 3 enters the drawing channel 111, it is first shaped at the entrance 113, which facilitates the drawing die head 12 to squeeze the aluminum tube 3.

[0049] Meanwhile, the inlet 113 of the drawing channel 111 is configured to match the diameter of the aluminum tube 3 before the diameter change, and the diameter change channel 112 is matched to the diameter of the aluminum tube 3 after the diameter change, so that the two ends of the gland 1 are matched with the diameters of the aluminum tube 3 before and after the diameter change, so that the aluminum tube 3 enters the drawing channel 111 and the diameter change channel 112. When passing through the gland 1, the aluminum tube 3 abuts against the two ends of the gland 1. The drawing channel 111, the diameter change channel 112 and the aluminum tube 3 cooperate to form a closed cavity inside the gland 1, which prevents the air from entering, so that the lubricating oil inside the gland 1 is less likely to have a viscosity reduction problem.

[0050] Example 3

[0051] Combination Figure 3 and Figure 4 Based on Embodiment 2, in order to improve the lubricating effect, the outlet 211 of the lubrication cavity 21 in the fixing ring 2 is configured to match the diameter of the aluminum tube 3 after the diameter change, so that the fixing ring 2 and the pressure cap 1 cooperate. The inlet 113 and the outlet 211 of this drawing lubrication structure are respectively matched with the diameter of the aluminum tube 3 before and after the diameter change, so that when the aluminum tube 3 enters the pressure cap 1 and then passes through the fixing ring 2, the two ends of the aluminum tube 3 respectively cooperate and abut with the inlet 113 and the outlet 211. The drawing channel 111, the diameter change channel 112 in the pressure cap 1, the lubrication cavity 21 in the fixing ring 2 and the aluminum tube 3 cooperate to form a closed space for lubricating oil, which prevents the entry of air, so that the lubricating oil is less likely to have a viscosity reduction problem inside this drawing lubrication structure.

[0052] Furthermore, the enclosed space of the lubricating oil will cause the pressure inside the drawing lubrication structure to fully cover the variable diameter drawing area and lubrication area of ​​the aluminum tube 3 with the lubricating oil. The pressure inside the drawing lubrication structure will gradually increase as the drawing speed of the aluminum tube 3 increases, which is more conducive to the formation of the lubricating oil film. This ensures that a lubricating oil film is always formed on the surface of the aluminum tube 3 during the drawing process, thereby improving the lubrication effect.

[0053] Example 4

[0054] Combined Figure 3 and Figure 4 Based on Example 3, in order to improve the uniformity of the lubricating oil film covering the surface of the aluminum tube 3, the drawing channel 111, the diameter changing channel 112, and the lubrication cavity 21 are all configured as cylindrical cavities, and the cross-section of the aluminum tube 3 is circular. This allows the drawing channel 111, the diameter changing channel 112, and the lubrication cavity 21 to cooperate with the aluminum tube 3 to form an annular lubrication space. The drawing force generated during the drawing process of the aluminum tube 3, as well as the pressure in the closed space of the lubricating oil, can act evenly on the entire surface of the aluminum tube 3, so that the lubricating oil covers the entire surface of the aluminum tube 3, forming an oil-immersed lubrication.

[0055] Compared to existing jet lubrication, the oil-immersion lubrication achieved by this invention can increase the contact area between the lubricating oil and the aluminum tube 3 and maintain the uniformity of the lubricating oil, thereby improving the lubrication effect.

[0056] To prevent lubricating oil from leaking from the gland 1 and the retaining ring 2, a sealing ring 4 is provided on the outside of the gland 1 and the retaining ring 2, so that the sealing ring 4 can seal the connection gap between the gland 1 and the retaining ring 2 and prevent lubricating oil leakage.

[0057] The following example illustrates the working process of this utility model in a specific application. It should be noted that the content described here is only a specific application example of this solution and does not constitute a limitation on this solution.

[0058] Combination Figure 4 The aluminum tube 3 is pre-lubricated and then enters the drawing channel 111 from the inlet 113 of the pressure cap 1. It is shaped at the inlet 113 and then enters the drawing channel 111. The diameter is changed by the drawing die 12 set in the drawing channel 111.

[0059] In the drawing channel 111, the drawing motion of the aluminum tube 3 generates a drawing force, which increases the pressure in the drawing channel 111. The pressure acts on the lubricating oil, causing the lubricating oil to stably cover the surface of the aluminum tube 3, and initially forming a lubricating oil film on the surface of the aluminum tube 3.

[0060] Next, after the aluminum tube 3 changes diameter, it enters the diameter-changing channel 112. The diameter-changing channel 112 is in close contact with the lubricating oil film on the surface of the aluminum tube 3. The aluminum tube 3 continues to be pulled, and the pulling force generated can match the abutting pressure of the diameter-changing channel 112 on the lubricating oil film, ensuring that the lubricating oil film is stably and evenly covered on the surface of the aluminum tube 3.

[0061] Furthermore, the aluminum tube 3 enters the lubrication cavity 21 of the fixed ring 2 through the variable diameter channel 112. Several oil inlets 22 symmetrically deliver lubricating oil to the lubrication cavity 21. The aluminum tube 3 performs a pulling motion simultaneously, and the resulting pulling force acts on the surface of the aluminum tube 3 again. Simultaneously with the increased pressure of the lubrication cavity 21, the lubricating oil covers the surface of the aluminum tube 3, forming a secondary lubricating oil film on the surface of the aluminum tube 3.

[0062] Finally, the aluminum tube 3 is inserted into the fixed ring 2 from the outlet 211 of the fixed ring 2.

[0063] During this process, the two ends of the aluminum tube 3 are respectively engaged with the inlet 113 and the outlet 211. The drawing channel 111 in the pressure cap 1, the diameter changing channel 112, the lubrication cavity 21 in the fixing ring 2, and the aluminum tube 3 work together to form a closed space for lubricating oil, preventing the entry of air. This makes it less likely for the lubricating oil to experience viscosity reduction within the drawing lubrication structure. Furthermore, the oil inlet 22 and the lubrication cavity 21 form a multi-path lubrication system, increasing the lubricating oil flow rate and preventing the lubricating oil from being affected by viscosity reduction, thereby improving the lubrication effect.

[0064] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An aluminum tube drawing lubrication structure for use with an aluminum tube, characterized in that, include A pressure cap, wherein an aluminum tube channel is formed within the pressure cap to accommodate the aluminum tube, and a drawing die is provided in the aluminum tube channel. A retaining ring is connected to the pressure cap and has a lubrication cavity inside that communicates with the aluminum tube channel. The retaining ring has a plurality of oil inlet holes that communicate with the lubrication cavity. The aluminum tube channel includes a drawing channel and a diameter-changing channel. The drawing channel is located at the end of the gland that mates with the aluminum tube, and the diameter-changing channel is located at the end of the gland that mates with the retaining ring.

2. The aluminum tube drawing lubrication structure according to claim 1, characterized in that, The pressure cap is configured in a circular shape, and the fixing ring is adapted to the pressure cap.

3. The aluminum tube drawing lubrication structure according to claim 1, characterized in that, The aluminum tube channel and the lubrication cavity are configured as a cylindrical cavity.

4. The aluminum tube drawing lubrication structure according to claim 1, characterized in that, The drawing die is disposed in the drawing channel, the diameter of the drawing channel is larger than the diameter of the aluminum tube before the diameter change, and the diameter of the diameter change channel is adapted to the diameter of the aluminum tube after the diameter change.

5. The aluminum tube drawing lubrication structure according to claim 4, characterized in that, The diameter of the lubrication cavity is larger than the diameter of the drawing channel and the diameter changing channel.

6. The aluminum tube drawing lubrication structure according to claim 1, characterized in that, The pressure cap and the retaining ring are configured to be detachably connected.

7. The aluminum tube drawing lubrication structure according to claim 1, characterized in that, The oil inlet holes are symmetrically distributed on the fixing ring.

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