TW200529941A - Equipment and method for treating the surface of a metal object - Google Patents

Abstract

The invention relates to an equipment for treating the surface of a metal object (2) made of copper or copper alloy prior to a deformation process (14), said equipment including means for conveying the metal object to the deformation process, an arrangement (1) for deoxidizing the metal object surface in at least one step, a rinsing arrangement (3) for cleaning the metal object surface, as well as a drying arrangement (15) for drying the surface, said rinsing arrangement and drying arrangement being placed as close to each other as possible. The invention also relates to a method for treating the surface of a metal object made of copper or copper alloy.

Description

200529941 IX. Description of the invention: [Technical field to which the invention belongs] The present invention relates to a device and method for treating the surface of metal objects made of copper or copper-gold before the deformation process. [Prior Art] In a continuous extrusion operation, the extruded material is guided to a groove provided on the outer periphery of the wheel element. When this element rotates around its axis, the extruded material enters the contact inverse element and substantially fills the groove, so that the movement of the extruded material relative to the wheeled element is changed. Therefore, the material is fed into the extruding direction through the extruding hole of the extruding element provided in the inverse element. This method uses the thermal energy generated by the friction and deformation processes. In this way, it is possible to actually squeeze long objects with advantageous different lateral surfaces. The feed line feeding continuous extrusion must often clean up the oxide layer accumulated on the surface. To ensure successful extrusion, it is better to introduce the oxide layer on the surface of the extruded feed line as thin as possible. In traditional continuous extrusion, surface compounds are mechanically removed and treated as so-called extrusion chips, whose rationale and recycling cause harmful extra costs. In addition, the generation of hot extrusion debris causes intense abrasion of the extrusion tool and reduces the extrusion speed to a small amount. In order to clean the copper metal surface, soaking (p i c k 1 i n g) is usually used, that is, the oxide layer on the metal surface is chemically cleaned with a solution. It is generally known that all grease and oil should be removed from the surface of the product during immersion. Copper metal is usually immersed in sulfuric acid / water solution, and it removes most of the oxygen accumulated on the surface. Traditional sulfuric acid immersion. After the immersion step, a low oxygen 312XP / Invention Specification (Supplement) / 94 -02/93 Π1530 The quality of the oxygen is at the level of the chemical 5 200529941 layer, but the dissolved oxygen and slow final wetting of acid and wet water can raise the oxide layer to almost as carefully as possible The same degree of oxidation of the cast and treated feed lines after casting. Oxidation can occur during the extrusion process even before oxides are removed from the surface of the feed material before continuous extrusion. It was found that even a small amount of oxygen in the protective gas can cause oxidative effects that are harmful to the product. Because the oxygen content in the protective gas is too high, the liner of the tank may also be oxidized, which may cause unexpected defects in the extruded product.

From U.S. Patent No. 4,763,502, a method for pre-treating non-ferrous objects prior to the deformation process is known. According to this invention, before the deformation process, the metal objects in motion are continuously deoxidized and cleaned, as well as wet and dried, and the purpose is to avoid the accumulation of an oxide layer on the surface of the object before the deformation process. However, it has also been found that the oxygen content of the humidified water in the feed line can affect the accumulation of the oxide layer. In addition, the use of normal air during the drying step can cause harmful oxidation on the surface. [Summary of the Invention] The purpose of the present invention is to introduce a new solution for treating the surface of metal objects made of copper or copper alloy before the deformation process, so as to avoid the oxidation of the surface of metal objects. The special purpose of the present invention is to avoid surface oxidation by adopting a more effective and rapid surface wetting and drying treatment. The features of the invention are described in the features section of the independent item in the scope of patent application. The features of other specific examples of the present invention are described in other items in the scope of patent application. 0 312XP / Invention Specification (Supplement) / 94-02 / 93] 31530 200529941 The configuration according to the present invention can achieve significant advantages. The configuration according to the present invention can form an oxide-free wire surface before the deformation process. The above deformation process, such as continuous extrusion, improves the output of a defect-free extrusion product. As a result, since the production of the crushed chips is prevented, the disadvantages caused by the processing and recovery of the crushed chips can be avoided.

According to the present invention, a device for treating a surface of a metal object made of copper or a copper alloy before a processing process is known. The device includes: a means for conveying the metal object to a deformation process; Equipment for deoxidizing the surface of metal objects; a wet configuration for cleaning the surface of metal objects, and a drying configuration for drying the surface thereof. The wet configuration and the drying configuration are located as close to each other as possible. The invention also relates to a method carried out by the above-mentioned device. By setting the wet configuration and the dry configuration as close to each other as possible, it is better to remove the wet liquid film produced in the wetting step by drying as soon as possible. Wetting equipment includes at least one wetting chamber and a wetting nozzle for spraying a wetting liquid onto the surface of a metal object. When the wetting fluid used is water in which oxygen is removed, surface oxidation can be advantageously prevented during the wetting step. The drying configuration includes at least a pre-drying chamber and a gas nozzle for feeding gas such as nitrogen to the surface of the metal object. The distance between the wet nozzle and the gas nozzle is preferably not more than 200 mm. In this case, the optimal degree of cleanliness and dryness on the surface of the metal object can be achieved. In addition, according to the present invention, the metal object is dried in a heated final drying chamber before the deformation process. According to the present invention, before the deformation process, during the wetting and drying process after the deoxidation step, the possible oxidation of the surface of the metal object can be effectively prevented. 7 312XP / Invention Specification (Supplement) / 94-02 / 9313] 530 200529941 The present invention will be described in more detail with reference to the drawings. [Embodiment]

FIG. 1 illustrates a method for treating a surface of a metal object 2 guided to a deformation process 14 according to the present invention, such as a continuous extrusion process. The term metal object here generally refers to a metal wire having a thickness of 10 to 25 mm. This metal wire can be manufactured by, for example, a vertical ballasting method, and the metal wire is further processed by continuous extrusion to form a product of a predetermined shape. The metal object 2 is subjected to at least one deoxidation treatment 1, where the oxide is removed from its surface in a known manner, such as by soaking with sulfuric acid. After the deoxidation treatment 1, a metal object such as a metal wire is guided to a wetting treatment, where the surface of the metal object 2 is wetted and impurities are removed from the surface. In the wetting process, the metal object 2 is processed in a wetting configuration 3. The wetting configuration 3 includes a wetting chamber 4, which is provided with a necessary number of wetting nozzles 5 for spraying the wetting liquid 21 on the surface of the metal object 2 to substantially make the impurity film Remove completely. The wetting nozzle 5 is placed in the wetting chamber 4, for example, the wetting nozzle 5 is placed around a metal object at a certain interval. A wetting liquid 21 is sprayed from a wetting nozzle 5, and the wetting liquid 21 is water. Oxygen is removed from the water by, for example, polarizing the water with nitrogen before spraying the water on the surface of the metal object. After the oxygen is removed, the oxygen content remaining in the humidified water is about 5 to 20 p p b. In order to spray the wetting liquid, the wetting nozzle is placed in the wetting chamber, and the wetting liquid is sprayed through the wetting nozzle 5 to remove all the impurity films from the surface of the metal object at the highest possible pressure. The traveling direction is better, and the angle C between the wetting nozzle and the metal object 2 is preferably 45 to 60 degrees. After the wetting treatment, the used wetting liquid can be removed from the humidifying chamber 4 8 312XP / Invention Specification (Supplement) / 94-02 / 93131530 200529941 through the drain line 10.

After the wetting process, the metal objects are dried in a pre-drying chamber 6 in a drying configuration 15 as quickly as possible, and the metal objects are pre-dried there to remove the wet liquid film. Between the humidification chamber 4 and the pre-drying chamber 6, a wall 7 is provided to separate the space defined by the humidification chamber 4 and the pre-drying chamber 6. The wall is provided with a slit 8, and the moving metal object 2 The slit 8 is suitable for traveling. In the pre-drying chamber 6, the surface of the metal object 2 is sprayed with pure nitrogen to dry the surface. Nitrogen is fed onto the surface of the metal object through a gas nozzle 9, and a necessary number of gas nozzles are placed around the metal object 2 at regular intervals. The gas nozzle 9 is provided to feed the gas in the direction of travel of the metal object, and the angle D between the gas nozzle and the metal object 2 is preferably 45 to 60 degrees. The partitioned room is arranged so that the distance A between the wetting nozzle 5 and the gas nozzle 9 is as short as possible, and the maximum distance is 200 mm, preferably about 20 mm. The distance B from the wall 7 to the end point 11 of the pre-drying chamber 6 is basically short, about 10-20 mm. When nitrogen is fed to the surface of the metal object through the gas nozzle 9, the main part of the nitrogen is discharged to the side of the humidification chamber 4 through the slit 8 provided in the wall 7, which prevents the spray of the wetting liquid from approaching the pre-drying chamber from the humidification chamber. . From the pre-drying chamber 6, the metal objects 2 are subjected to a final drying treatment, and the metal objects in motion are transferred to a heated gas atmosphere of the final drying chambers 12 to be dried. The gas used may be nitrogen with a temperature above 150 ° C. During the final drying process, the metal objects are basically maintained for longer than the pre-drying step that takes place in the pre-drying chamber. Another method for obtaining heat in the final drying chamber 12 according to the present invention is to use induction heating to heat the final drying chamber. Up to 9 312XP / Invention Specification (Supplement) / 94-02 / 93】 3] 530

200529941 After the final drying process, the metal object is guided to the deformation process 14, ^ continuous extrusion. The configuration 1 for deoxidizing the metal surface, the wet configuration, the dry configuration 15 and the continuous extrusion equipment 14 are all isolated from the internal air of the separated oxygen-free protective atmosphere to avoid oxidation of the surface of the metal object. Between each step, the metal object is guided along the correct route by the control element 16 such as a control ring, but the metal object is mainly moved by continuously extruding and moving the feeding element 17. Fig. 2 is a more detailed explanation of the conventional continuous extrusion equipment 14. From the drying chamber 12, the metal object 2 is guided onto the feeding element > of the pressing device and further to a groove 18 provided around the feeding element. In the process, the extruded material further advances toward the stopper (storp) 19, forcing a change of direction toward the pressing element 20, whereby the material is formed in a predetermined shape. For those skilled in the art, different specific examples of the present invention are obvious, and should not be limited to the above embodiments, but can be changed differently within the scope of the attached application. [Brief description of the drawings] FIG. 1 is a device according to the present invention; and FIG. 2 is a deformation process. [Description of main component symbols] 1 Deoxidizing metal surface configuration 2 Metal objects 3 Wet configuration 4 Humidity chamber 312XP / Invention Manual (Supplement) / 94-02 / 93131530 That is, 3. The dry body synchronizer 2 is finally set ^ 17 Patented in the material of the tank is easy to see patent 10 200529941 5 Wet nozzle 6 Pre-drying chamber 7 Wall 8 Slot 9 Gas nozzle 10 Discharge line 11 End point

12 13 14 15 16 17 18 19 Final drying chamber Gas Continuous extrusion equipment (deformation process) Drying configuration Control element Mobile feed element Slot Stopper

Squeeze element

Wetting liquid 22 Nitrogen A Distance between the wetting nozzle 5 and the gas nozzle 9 B Distance from the wall 7 to the end point 1 of the pre-drying chamber 6 1 Angle C between the wetting nozzle and the metal object 2 D between the gas nozzle Angle between 9 and metal object 2 312XP / Invention Specification (Supplement) / 94-02 / 93131530

Claims (1)

200529941 X. Scope of patent application: 1. A surface treatment equipment for a metal object (2), which is used to treat the surface of a metal object made of copper or a copper alloy before the deformation process (14), and the apparatus comprises: means for conveying the metal object to the deformation process ( 1 6); a configuration (1) for deoxidizing the surface of the metal object in at least one step; a wet configuration (3), comprising at least a wetting chamber (4) and a wetting nozzle (5) for spraying a wetting liquid (2 1 ) To the surface of the metal object (2) to clean the surface of the metal object; and a dry configuration (1 5), including at least a gas nozzle (9) for feeding gas (2 2) to the surface of the metal object (2), to The dry surface is characterized by a distance (A) between the wetting nozzle (5) and the gas nozzle (9) of at most 200 mm. 2. The device according to item 1 of the scope of patent application, wherein the moisturizing solution (2 1) is water and its oxygen content is removed. 3. The device according to item 1 of the patent application scope, wherein the drying configuration (1 5) includes at least a pre-drying chamber (6) and a gas nozzle (9) for feeding gas (2 2) to the metal object ( 2) on the surface. 4. The equipment as claimed in item 3 of the patent application, wherein the gas (2 2) is nitrogen. 5. If the equipment of the scope of patent application item 1 or 3, wherein the pre-drying chamber (6) and the humidification chamber (4) are separated from each other by a wall (7), the wall is provided with a slit (8), Used to enable metal objects to travel. 6. The device according to item 5 of the scope of patent application, wherein the distance (B) from the wall (7) to the end point (1 1) of the pre-drying chamber (6) is preferably 10-20 mm 0 12 312XP / Inventory Supplement) / 94-02 / 93 1530 200529941 7. The device in the scope of patent application item 3, wherein the drying configuration (1 5) includes a heated final drying chamber (1 2). 8. The device according to item 7 of the scope of patent application, wherein the final drying chamber (1 2) is heated by nitrogen (1 3) having a temperature higher than 150 ° C. 9. The device according to item 7 of the patent application scope, wherein the final drying chamber (1 2) is heated by an induction heater. 10. The device according to any one of the aforementioned patent applications, wherein the device (1), wet configuration (3), dry configuration (1 5), and deformation process (1 4) for deoxidizing the surface of metal objects Separated from the surroundings by the same shielding gas. 11. The device according to item 1 of the scope of patent application, wherein the deformation process is a continuous extrusion process. 1 2 · — A method for treating the surface of a metal object (2), which is a surface of a metal object made of copper or a copper alloy before the deformation process (14), wherein a surface of a moving metal object is before the deformation process , At least one step of deoxidation, and after the deoxidation step, the surface of the metal object is cleaned by a wet configuration (3) and dried by a dry configuration (1 5), which is characterized by a wet nozzle (5) of the wet configuration (3) ) And the gas nozzles (9) in the dry configuration (1 5) are located at no more than a distance (A) from each other, the distance (A) being at most 200 mm. 13. The method according to item 12 of the scope of patent application, wherein, in the cleaning step, a moistening liquid is sprayed on the surface of the moving metal object (2). 14. The method according to item 12 of the scope of patent application, wherein in the drying step, a gas is fed into the surface of the moving metal object (2), and then the surface of the metal object is heated with a protective gas. Dry it. 13 312XP / Invention Manual (Supplement) / 94-02 / 93131530