CN111922646B - Integrated aluminum alloy hanging buckle with round corners at edges and preparation method thereof - Google Patents
Integrated aluminum alloy hanging buckle with round corners at edges and preparation method thereof Download PDFInfo
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- CN111922646B CN111922646B CN202010793477.5A CN202010793477A CN111922646B CN 111922646 B CN111922646 B CN 111922646B CN 202010793477 A CN202010793477 A CN 202010793477A CN 111922646 B CN111922646 B CN 111922646B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
- A44B15/00—Key-rings
- A44B15/005—Fobs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/02—Pressure casting making use of mechanical pressure devices, e.g. cast-forging
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
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- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
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Abstract
The invention discloses an integrated aluminum alloy hanging buckle with round corners at the edges and a preparation method thereof, wherein the method comprises the following steps: s1, extrusion forming: manufacturing an aluminum alloy bar into a long-strip-shaped aluminum alloy blank with a hanging buckle section shape by adopting an extrusion forming process; s2, machining: cutting the long-strip-shaped aluminum alloy blank along the section direction of the long-strip-shaped aluminum alloy blank by machining to obtain an aluminum alloy hanging buckle blank with the required thickness; s3, surface treatment: and carrying out surface treatment on the obtained aluminum alloy hanging buckle blank to obtain an aluminum alloy hanging buckle product. According to the preparation method of the hanging buckle, the zinc alloy is replaced by the aluminum alloy, no waste is generated in the production process, and the production cost is obviously reduced; the aluminum alloy blank prepared by the extrusion forming process has smooth and burr-free surface, the aluminum alloy blank does not need to be polished, the processing procedures are reduced, and in addition, the surface coloring property of the aluminum alloy hanging buckle blank is good, so that the decorative requirement of various hanging buckle products can be better met.
Description
Technical Field
The invention relates to the technical field of metal hanging buckle processing, in particular to an integrated aluminum alloy hanging buckle with round corners at the edges and a preparation method thereof.
Background
At present, the forming modes of metal hanging buckles such as key buckles, luggage buckles, climbing buckles and the like include two modes of die casting and stamping, and after blank materials are obtained through forming, various metal fastener finished products with rich colors are prepared through surface treatment processes such as electroplating or paint spraying. Wherein, the stamping is to use machines such as a punch press and the like to make a semi-finished product into a finished product, and the die casting is to heat metal into liquid state and press the liquid metal into a die for forming, so as to obtain a product the same as the die. The selection of the forming mode is related to the product structure, and the two forming modes are mainly used for obtaining metal fastener products with different structures.
The stamping mode is mainly used for forming products such as snap buttons, eyelet buttons and the like, blanks of the stamped products are accompanied by side burrs and need to be manually polished, more waste materials are generated by stamping, and in addition, the loss of stamping dies is large, so the production cost is high, and the occupied market share is small; the die casting mode is mainly used for forming plane type hanging buckle products, is popular with consumers and occupies a large market.
At present, a metal hanging buckle formed by die casting mainly adopts a zinc alloy raw material, zinc alloy molten paper is in a liquid state through heating equipment, then the liquid zinc alloy molten paper is injected into a die for die casting forming, then a joint line on the side surface of a product is polished and polished manually, and finally surface treatment processes such as chemical electroplating, paint spraying, oil spraying and the like are carried out to obtain a hanging buckle finished product. However, the surface treatment of the zinc alloy product by chemical plating has large pollution to the environment, and the surface is monotonous in coloring, and basically has bright silver color as the main point; and the surface treatment mode is carried out on the zinc alloy product by adopting the oil spraying and paint spraying modes, so that the diversification of the surface color can be realized, but the product is not scratch-resistant and is easy to fade, and the quality of the product is influenced. More importantly, the zinc alloy has higher cost and high density, and the profit margin for producing the metal hanging buckle is small.
In order to solve the above problems, the industry has proposed replacing zinc alloy with low-cost raw materials such as aluminum alloy, and other fields have the case of using aluminum alloy to replace zinc alloy to reduce cost. However, unlike other fields, the metal buckle industry has very high requirements on the surface treatment effect of products, and aluminum alloy die castings have the problems of easy adhesion, easy corrosion to metal crucibles, large volume shrinkage, easy generation of shrinkage cavities and the like, are difficult to accept various surface treatments or achieve ideal surface treatment effects, usually generate film bubbling and even cracking phenomena, have uneven surfaces, are difficult to color to obtain rich colors, and have poor corrosion resistance. Therefore, no aluminum alloy material-based metal hanging buckle and a production process thereof exist in the industry at present.
Disclosure of Invention
In view of the above, the invention aims to provide an integrated aluminum alloy hanging buckle with rounded corners at the edges and a preparation method thereof, so as to solve the technical problems of high production cost, single surface treatment mode and difficult coloring in the prior art in which a zinc alloy material is adopted for preparing the metal hanging buckle by a die-casting molding process.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a preparation method of an integrated aluminum alloy hanging buckle with round corners at the edges comprises the following steps:
s1, extrusion forming: manufacturing an aluminum alloy bar into a long-strip-shaped aluminum alloy blank with a hanging buckle section shape by adopting an extrusion forming process;
s2, machining: cutting the long-strip-shaped aluminum alloy blank along the section direction of the long-strip-shaped aluminum alloy blank by machining to obtain an aluminum alloy hanging buckle blank with the required thickness;
s3, surface treatment: and carrying out surface treatment on the obtained aluminum alloy hanging buckle blank to obtain an aluminum alloy hanging buckle product.
Further, step S1 specifically includes the following steps:
s11, performing extrusion processing, namely preprocessing an aluminum alloy bar, heating the aluminum alloy bar to a semi-molten state, putting the aluminum alloy bar into an extrusion cylinder of an extruder, enabling an extrusion device in the extrusion cylinder to move towards a product extrusion die at an extrusion speed of 1.2-1.6 m/min, extruding the aluminum alloy bar in the semi-molten state, and extruding the aluminum alloy bar in the semi-molten state from a die hole of the product extrusion die to form an aluminum alloy blank;
s12, quenching treatment: carrying out on-line quenching treatment on the obtained aluminum alloy blank;
s13, stretching and straightening: stretching and straightening the quenched aluminum alloy blank to obtain a hardened long-strip aluminum alloy blank;
s14, cutting and slitting: and cutting the hardened long-strip aluminum alloy blank at a fixed length.
Further, step S2 specifically includes the following steps:
s21, molding: processing the end part of the strip-shaped aluminum alloy blank by using a forming cutter on a machine tool to obtain an aluminum alloy hanging buckle blank with a required shape;
s22, fixed-length sawing: and cutting the aluminum alloy hanging buckle blank with the required appearance from the end part of the strip-shaped aluminum alloy blank along the section direction of the strip-shaped aluminum alloy blank by using a cutting tool on the same machine tool to obtain the aluminum alloy hanging buckle blank with the required appearance and thickness.
Further, in step S2, the machine tool is a horizontal CNC numerical control machine tool.
Further, in step S3, the surface treatment is performed on the aluminum alloy suspension fastening blank by means of hard anodizing treatment.
Further, the hard anodizing treatment process comprises the following steps:
s31, preprocessing: sequentially carrying out degreasing treatment and water washing treatment on the aluminum alloy hanging buckle blank;
s32, anodic oxidation treatment: taking the pretreated aluminum alloy hanging buckle blank as an anode, putting the aluminum alloy hanging buckle blank into an oxidation tank containing anodic oxidation electrolyte, taking a lead plate as a cathode, and switching on a power supply to carry out anodic oxidation;
s33, sealing and drying: and sequentially carrying out hole sealing and air drying treatment on the anodized aluminum alloy hanging buckle blank to obtain an aluminum alloy hanging buckle product.
Further, the aluminum alloy bar takes 6061, 6063 or 7075 alloy as a raw material.
Further, in step S1, the temperature at which the aluminum alloy rod is heated to a semi-molten state is 450 to 490 ℃.
Further, the aluminum alloy hanging buckle is any one of an aluminum alloy key buckle, an aluminum alloy case buckle and an aluminum alloy mountain climbing buckle.
On the other hand, the invention also provides the integrated aluminum alloy hanging buckle with the round corners at the edges, which is prepared by the preparation method, and the integrated aluminum alloy hanging buckle comprises the following components: the clamping hook, the connecting arm, the main body part, the elastic hanging arm and the pressing arm are connected in sequence and enclose to form a movable cavity, and the end part of the pressing arm is movably abutted and matched with the end part of the clamping hook; the main part connect in the linking arm is kept away from the one end of joint couple, the linking arm with press the arm to be located respectively the relative both sides in activity chamber, elasticity is hung the arm and is serpentine line structure and its initiating terminal extends to the linking arm, elasticity hang the arm with be formed with groove structure between the main part.
The technical scheme of the invention has the following advantages:
1. the invention provides a preparation method of an integrated aluminum alloy hanging buckle with round corners at the edge, which comprises the steps of firstly processing an aluminum alloy bar into a strip-shaped aluminum alloy blank with a hanging buckle section shape by adopting an extrusion forming process, then cutting the strip-shaped aluminum alloy blank in a machining mode to obtain an aluminum alloy hanging buckle blank with required thickness, and finally carrying out surface treatment on the aluminum alloy hanging buckle blank to obtain an aluminum alloy hanging buckle product; according to the preparation method of the aluminum alloy hanging buckle, the aluminum alloy is adopted to replace the zinc alloy to prepare the hanging buckle, so that the production cost is greatly reduced, no waste is generated, and the material utilization rate is high; the mode that the aluminum alloy hanging buckle blank is formed by machining is adopted, the machining precision of the product is high, the production efficiency is high, more importantly, the surface of the extruded aluminum alloy blank is smooth and free of burrs, the aluminum alloy blank obtained by machining does not need to be polished, one machining process is reduced, the automation of the whole machining process can be realized, the surface colorability of the aluminum alloy hanging buckle blank is good, and the decorative requirements of various products can be better met.
2. According to the preparation method of the integrated aluminum alloy hanging buckle with the round corners at the edge, provided by the invention, the dynamic recovery degree of the aluminum alloy can be reduced by reasonably controlling the heating temperature and the extrusion speed in the extrusion processing process of the aluminum alloy bar, the formation of coarse grains and deep coarse grain rings is avoided, the use requirement is met, the yield is improved, and the production cost is reduced.
3. According to the preparation method of the integrated aluminum alloy hanging buckle with the round corners at the edges, the round corners are required to be arranged at the edges of two sides of some common sheet aluminum alloy hanging buckles, during machining, an aluminum alloy hanging buckle blank with a required shape (for example, the round corners at two ends) is obtained by machining the end part of a long-strip aluminum alloy blank through a forming cutter on a machine tool, and then the aluminum alloy hanging buckle blank with the required shape is cut off from the end part of the long-strip aluminum alloy blank along the section direction of the long-strip aluminum alloy blank through a cutting cutter, so that the aluminum alloy hanging buckle blank with the required shape and thickness can be obtained, integrated machining is realized, and automatic production is facilitated.
4. According to the preparation method of the integrated aluminum alloy hanging buckle with the round corners at the edge, provided by the invention, when a long-strip-shaped aluminum alloy blank is machined in a common vertical machine tool, the long-strip-shaped aluminum alloy blank needs to be additionally positioned by adopting the clamping and positioning mechanism, and the clamping and positioning mechanism can be blocked on the outer surface of the aluminum alloy blank, so that the aluminum alloy blank cannot be machined, and the machine tool adopts a horizontal CNC (computer numerical control) machine tool.
5. According to the preparation method of the integrated aluminum alloy hanging buckle with the round corners at the edge, the surface treatment mode is adopted for the aluminum alloy hanging buckle blank by adopting the hard anodic oxidation treatment process, the surface coloring property is good, the requirements of various product appearance colors can be met, the thickness of an oxidation film on the surface of the aluminum alloy hanging buckle is high, and the wear resistance and the corrosion resistance are greatly improved; in addition, the hard anode has little corrosion to the oxide film in the oxidation process, the film forming speed is high, the electrolyte cannot be scrapped due to the increase of aluminum ions, and the service life is long.
6. The aluminum alloy hanging buckle prepared by the preparation method of the integrated aluminum alloy hanging buckle with the round corners at the edges has the advantages of smooth and flat surface, dyeing, good dyeing effect, good wear resistance and corrosion resistance, and remarkably reduced production cost compared with the existing metal hanging buckle prepared by zinc alloy die casting.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural diagram of an integrated aluminum alloy fastener with rounded edges, which is prepared by the method for preparing the integrated aluminum alloy fastener with rounded edges provided in the embodiment of the invention;
FIG. 2 is a flow chart of an implementation of a method for manufacturing an aluminum alloy buckle according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a long-strip aluminum alloy billet with a hanging cross-sectional shape obtained by an extrusion molding process of an aluminum alloy bar in the embodiment of the invention;
FIG. 4 is a flow chart of an implementation of an extrusion forming process of an aluminum alloy hanging buckle in an embodiment of the invention;
FIG. 5 is a flow chart of an implementation of a machining process of an aluminum alloy buckle hanging machine in an embodiment of the invention;
FIG. 6 is a schematic structural diagram of an end of an elongated aluminum alloy blank after being formed and processed according to an embodiment of the present invention;
FIG. 7 is a flow chart of an implementation of the hard anodizing process for aluminum alloy suspension hooks in the embodiment of the present invention.
Description of reference numerals: 1. clamping the hook; 2. a connecting arm; 3. a main body portion; 4. an elastic hanging arm; 5. pressing the arm; 6. a flange; 7. hanging holes; 8. and (4) rounding.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The aluminum alloy hanging buckle comprises a clamping hook 1, a connecting arm 2, a main body part 3, an elastic hanging arm 4 and a pressing arm 5 which are connected in an integrated manner, wherein the clamping hook 1, the connecting arm 2, the elastic hanging arm 4 and the pressing arm 5 are sequentially connected and enclose to form a movable cavity, and the end part of the pressing arm 5 is movably abutted and matched with the end part of the clamping hook 1; main part 3 connects in the one end that joint couple 1 was kept away from to linking arm 2, and linking arm 2 and press arm 5 to be located the relative both sides in activity chamber respectively, and elasticity is hung arm 4 and is the serpentine line structure and its initiating terminal extends to linking arm 2, and elasticity is hung and is formed with the groove structure between arm 4 and the main part 3. The aluminum alloy hanging buckle adopts an integrated structure, and has simple structure and low production cost; and the pressing arm 5 is connected with one end of the connecting arm 2 through the elastic hanging arm 4, so that the pressing arm 5 has elastic stroke. The elastic hanging arm 4 is of a serpentine line structure, the starting end of the elastic hanging arm extends to the connecting arm 2, and a groove structure is formed between the elastic hanging buckle and the main body part 3, so that the elastic stroke of the elastic hanging arm 4 is large, and the pressing arm 5 is more labor-saving.
Specifically, the connecting arm 2 is integrally formed with a flange 6 extending into the movable cavity, the flange 6 is used for limiting the pressing stroke of the pressing arm 5 into the movable cavity, the phenomenon that the inward bending stroke of the pressing arm 5 is too large and the elastic hanging arm 4 is damaged is avoided, and the service life of the aluminum alloy hanging buckle can be prolonged.
Specifically, the main body part 3 of the aluminum alloy hanging buckle is provided with a hanging hole 7, the hanging hole 7 is of an open structure, and the hanging ring can be extruded into the hanging hole 7 through an opening in the hanging hole 7.
Specifically, the aluminum alloy hanging buckle is in a sheet shape, and the edges of two sides of the aluminum alloy hanging buckle are provided with round corners 8.
As shown in fig. 2, an embodiment of the present invention provides a method for preparing an integrated aluminum alloy buckle with rounded corners at edges, which specifically includes the following steps:
step S1, extrusion molding: manufacturing an aluminum alloy bar into a long-strip-shaped aluminum alloy blank with a hanging buckle section shape by adopting an extrusion forming process; the structure of the strip-shaped aluminum alloy blank can be seen with reference to fig. 3.
Step S2, machining: and cutting the strip-shaped aluminum alloy blank along the section direction of the strip-shaped aluminum alloy blank by adopting a numerical control equipment processing mode to obtain the aluminum alloy hanging buckle blank with the required thickness.
Step S3, surface treatment: and carrying out surface treatment on the obtained aluminum alloy hanging buckle blank to obtain an aluminum alloy hanging buckle product.
According to the preparation method of the aluminum alloy hanging buckle, firstly, an extrusion forming process is adopted to process an aluminum alloy bar into a long-strip-shaped aluminum alloy blank with the shape of a hanging buckle section, then the long-strip-shaped aluminum alloy blank is cut in a machining mode to obtain an aluminum alloy hanging buckle blank with required thickness, and finally, the aluminum alloy hanging buckle blank is subjected to surface treatment to obtain an aluminum alloy hanging buckle product; according to the preparation method, the aluminum alloy is adopted to replace the zinc alloy to prepare the hanging buckle, so that the production cost is greatly reduced, no waste is generated, and the material utilization rate is high; the mode that the aluminum alloy hanging buckle blank is formed by machining is adopted, the machining precision of the product is high, the production efficiency is high, more importantly, the surface of the extruded aluminum alloy blank is smooth and free of burrs, the aluminum alloy blank obtained by machining does not need to be polished, one machining process is reduced, the automation of the whole machining process is conveniently realized, the surface coloring performance of the aluminum alloy hanging buckle blank is good, and the decorative requirements of various hanging buckle products can be better met.
As shown in fig. 4, the step of S1 extrusion molding specifically includes the following steps:
s11, extrusion processing, wherein the aluminum alloy bar is pretreated, heated to 450-490 ℃, in a semi-molten state, and placed into an extrusion cylinder of an extruder, an extrusion device in the extrusion cylinder advances towards a product extrusion die at an extrusion speed of 1.2-1.6 m/min, the aluminum alloy bar in the semi-molten state is extruded, and the aluminum alloy bar in the semi-molten state is extruded from a die hole of the product extrusion die to form a strip-shaped aluminum alloy blank.
In some embodiments, before step S11, the aluminum alloy bar may be further subjected to a homogenization treatment and an oxide film on the surface of the homogenized aluminum alloy bar may be cut off. The homogenization treatment can improve the plasticity of the aluminum alloy bar, improve the technological performance, improve the anisotropic performance of the internal crystal structure of the aluminum alloy bar, eliminate the residual stress in the aluminum alloy bar and be beneficial to obtaining the aluminum alloy bar with more uniform internal crystal structure. Preferably, the homogenization treatment is carried out in a resistance furnace with a forced hot air circulation system, the temperature of the homogenization treatment is 490-550 ℃, and the heat preservation time is 3-5 hours; preferably, the homogenization temperature is 580 degrees Celsius and the homogenization time is 4 hours.
Preferably, in the step of extrusion processing, the extrusion device comprises an extrusion die and an extrusion cylinder arranged in the extrusion die, the heating temperature of the extrusion die is 500-550 ℃, and the heating temperature of the extrusion cylinder is 480-500 ℃.
Preferably, in the step of extrusion processing, the aluminum alloy bar is heated in a stepped manner, the temperature of the head of the aluminum alloy bar is 470-490 ℃, the temperature of the middle of the aluminum alloy bar is 450-470 ℃, and the temperature of the tail of the aluminum alloy bar is 430-450 ℃.
Step S12, quenching: carrying out on-line quenching treatment on the obtained aluminum alloy blank; the temperature of the aluminum alloy blank entering the quenching area is 430-450 ℃, and the temperature of the aluminum alloy blank leaving the quenching area is less than 30 ℃.
Step S13, stretching and straightening: and (3) stretching and straightening the quenched aluminum alloy blank by 0.5-1.5% to obtain a hardened long-strip aluminum alloy blank.
Step S14, cutting and splitting: and cutting the hardened long-strip aluminum alloy blank at a fixed length.
In the extrusion forming process, the heating temperature and the extrusion speed in the extrusion processing process of the aluminum alloy bar are reasonably controlled, the dynamic recovery degree of the aluminum alloy can be reduced, the formation of coarse grains and deep coarse grain rings is avoided, the use requirement is met, the yield is improved, and the production cost is reduced. And after the aluminum alloy bar is subjected to gradient heating and quenching treatment, a high-strength aluminum alloy blank can be obtained.
As shown in fig. 5, in the step of S2 machining, the method specifically includes the following steps:
step S21, molding: and processing the end part of the strip-shaped aluminum alloy blank by a forming cutter on a machine tool to obtain the aluminum alloy hanging buckle blank with the required appearance. In this embodiment, the appearance that needs processing on the aluminum alloy hanging buckle blank is the fillet of aluminum alloy hanging buckle both sides outward flange, and the shaping cutter is the circular arc sword, and the circular arc sword can be according to the thickness of aluminum alloy hanging buckle, and the aluminum alloy hanging buckle that both ends all have the fillet is obtained in the tip one-time processing of rectangular shape aluminum alloy stock. The structure of the end of the long aluminum alloy blank after being formed and processed by the arc knife can be seen in fig. 6.
Step S22, fixed-length sawing: and cutting the aluminum alloy hanging buckle blank with the required appearance from the end part of the strip-shaped aluminum alloy blank along the section direction of the strip-shaped aluminum alloy blank by using a cutting tool on the same machine tool to obtain the aluminum alloy hanging buckle blank with the required appearance and thickness.
Because the edges of two surfaces of some common sheet aluminum alloy hanging buckles are required to be provided with round corners (such as the aluminum alloy hanging buckle shown in figure 1), in the machining process, aluminum alloy hanging buckle blanks of which the two ends are provided with the round corners are obtained by machining the end parts of long-strip-shaped aluminum alloy blanks through a forming cutter on a machine tool, then the aluminum alloy hanging buckle blanks of which the two ends are provided with the round corners are cut off from the end parts of the long-strip-shaped aluminum alloy blanks along the section direction of the long-strip-shaped aluminum alloy blanks through a cutting tool, the aluminum alloy hanging buckle blanks of which the shapes and the thicknesses are required can be obtained, the integrated machining is realized, and the automatic production is favorably realized.
In the present embodiment, the machine tool used in step S2 is a horizontal CNC numerical control machine tool. Because rectangular shape aluminum alloy stock carries out machine-hour in common vertical lathe, need additionally adopt centre gripping positioning mechanism to fix a position rectangular shape aluminum alloy stock, and centre gripping positioning mechanism can keep off at aluminum alloy stock surface, leads to this part aluminum alloy stock can't process, and the lathe adopts horizontal CNC digit control machine tool, because horizontal setting of the processing main shaft of horizontal CNC digit control machine tool, can reduce the production of waste material, improves material utilization.
As shown in fig. 7, in the step of S3, the surface treatment is performed on the aluminum alloy hanging buckle blank by a hard anodizing treatment, where the aluminum alloy hard anodizing treatment process includes:
step S31, preprocessing: and sequentially carrying out degreasing treatment and water washing treatment on the aluminum alloy hanging buckle blank to remove impurities such as grease on the surface of the aluminum alloy hanging buckle blank. Preferably, after the degreasing treatment, desmutting treatment and chemical polishing treatment may be performed. In the step of degreasing treatment, trisodium phosphate is adopted to degrease under the alkaline condition, the temperature of degreasing treatment is 50-60 ℃, and the time is 2-4 min; in the step of stripping the black film, the black film is stripped by nitric acid, the temperature of the stripping film treatment is room temperature, and the time is 30-90 s; in the step of chemical polishing treatment, pure phosphoric acid with specific gravity of 1.69-1.71 g/mL is adopted as the polishing agent, the temperature of the chemical polishing treatment is 100-.
Step S32, anodic oxidation treatment: taking the pretreated aluminum alloy hanging buckle blank as an anode, putting the aluminum alloy hanging buckle blank into an oxidation tank containing anodic oxidation electrolyte of 150g/L sulfuric acid, taking a lead plate as a cathode, controlling the temperature to be 10 ℃, switching on a power supply to start anodic oxidation, gradually increasing the voltage from 14V to 24V at the rising rate of 1V/min in the oxidation process, switching off the power supply, and finishing oxidation.
Step S33, sealing and drying: and sequentially carrying out hole sealing and air drying treatment on the anodized aluminum alloy hanging buckle blank to obtain an aluminum alloy hanging buckle product. The hole sealing treatment can improve the corrosion resistance and the appearance luster of an oxide film formed on the surface of the aluminum alloy hanging buckle blank, and ensure that the obtained aluminum alloy hanging buckle can not fade for a long time. The air drying treatment can prevent water marks from being left on the surface of the aluminum alloy hanging buckle.
The aluminum alloy hanging buckle blank is subjected to surface treatment by adopting a hard anodic oxidation treatment process, the surface coloring property is good, the requirements of various product appearance colors can be met, and the thickness of an oxide film on the surface of the aluminum alloy hanging buckle is high, so that the wear resistance and the corrosion resistance are greatly improved; in addition, the hard anode has little corrosion to the oxide film in the oxidation process, the film forming speed is high, the electrolyte cannot be scrapped due to the increase of aluminum ions, and the service life is long.
In the embodiment of the invention, the aluminum alloy bar takes 6061, 6063 or 7075 alloy as a raw material. Of course, the preparation method of the aluminum alloy hanging buckle provided by the embodiment of the invention can also be applied to the production of other aluminum alloy extruded materials, such as 2618, LD7, LD 7-4 and other alloys.
The aluminum alloy hanging buckle prepared by the preparation method provided by the embodiment of the invention can be any one of an aluminum alloy key ring, an aluminum alloy case buckle and an aluminum alloy mountain climbing buckle.
In conclusion, the preparation method of the aluminum alloy hanging buckle provided by the embodiment of the invention adopts the aluminum alloy to replace the zinc alloy to prepare the hanging buckle, so that the production cost of the metal hanging buckle is greatly reduced, no waste is generated, and the material utilization rate is high; the mode of adopting digit control machine tool shaping aluminum alloy to hang knot embryo spare, the machining precision of product is high, production efficiency is high, more importantly, because the smooth no burr in surface of extrusion's aluminum alloy embryo spare, need not polish the aluminum alloy embryo spare that the machine tooling obtained, reduced one manufacturing procedure, also conveniently realize the automation of whole course of working, the surface colourability of aluminum alloy material hanging knot embryo spare is good moreover, can satisfy all kinds of decorative requirements of hanging the knot product better.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (9)
1. The preparation method of the integrated aluminum alloy hanging buckle with the round corners at the edges is characterized in that the aluminum alloy hanging buckle comprises the following steps: the clamping hook, the connecting arm, the elastic hanging arm and the pressing arm are sequentially connected and enclose to form a movable cavity, and the end part of the pressing arm is movably abutted and matched with the end part of the clamping hook; the connecting arm and the pressing arm are respectively positioned at two opposite sides of the movable cavity, the elastic hanging arm is of a serpentine line structure, and the starting end of the elastic hanging arm extends to the connecting arm; the preparation method comprises the following steps:
s1, extrusion forming: manufacturing an aluminum alloy bar into a long-strip-shaped aluminum alloy blank with a hanging buckle section shape by adopting an extrusion forming process;
s2, machining: steps including the following S21 and S22;
s21, molding: processing the end part of the strip-shaped aluminum alloy blank by using a forming cutter on a machine tool to obtain an aluminum alloy hanging buckle blank with a required shape;
s22, fixed-length sawing: cutting an aluminum alloy hanging buckle blank with a required shape from the end part of the strip-shaped aluminum alloy blank along the section direction of the strip-shaped aluminum alloy blank by using a cutting tool on the same machine tool to obtain the aluminum alloy hanging buckle blank with the required shape and thickness;
s3, surface treatment: and carrying out surface treatment on the obtained aluminum alloy hanging buckle blank to obtain an aluminum alloy hanging buckle product.
2. The method for preparing the integrated aluminum alloy hanging buckle with the round corner at the edge according to claim 1, wherein the step S1 specifically comprises the following steps:
s11, performing extrusion processing, namely preprocessing an aluminum alloy bar, heating the aluminum alloy bar to a semi-molten state, putting the aluminum alloy bar into an extrusion cylinder of an extruder, enabling an extrusion device in the extrusion cylinder to move towards a product extrusion die at an extrusion speed of 1.2-1.6 m/min, extruding the aluminum alloy bar in the semi-molten state, and extruding the aluminum alloy bar in the semi-molten state from a die hole of the product extrusion die to form an aluminum alloy blank;
s12, quenching treatment: carrying out on-line quenching treatment on the obtained aluminum alloy blank;
s13, stretching and straightening: stretching and straightening the quenched aluminum alloy blank to obtain a hardened long-strip aluminum alloy blank;
s14, cutting and slitting: and cutting the hardened long-strip aluminum alloy blank at a fixed length.
3. The method for preparing an integral aluminum alloy hanger with round corners at the edges according to claim 2, wherein in step S2, the machine tool is a horizontal CNC numerical control machine tool.
4. The method for preparing an integral aluminum alloy hanger with round corners at the edges according to claim 1, wherein in step S3, the surface treatment is performed on the aluminum alloy hanger blank by means of hard anodizing treatment.
5. The method for preparing the integrated aluminum alloy hanging buckle with the round corner at the edge according to claim 4, wherein the hard anodizing treatment process comprises the following steps:
s31, preprocessing: sequentially carrying out degreasing treatment and water washing treatment on the aluminum alloy hanging buckle blank;
s32, anodic oxidation treatment: taking the pretreated aluminum alloy hanging buckle blank as an anode, putting the aluminum alloy hanging buckle blank into an oxidation tank containing anodic oxidation electrolyte, taking a lead plate as a cathode, and switching on a power supply to carry out anodic oxidation;
s33, sealing and drying: and sequentially carrying out hole sealing and air drying treatment on the anodized aluminum alloy hanging buckle blank to obtain an aluminum alloy hanging buckle product.
6. The method for preparing the integrated aluminum alloy hanging buckle with the round corner at the edge according to claim 1, wherein the aluminum alloy bar is made of 6061, 6063 or 7075 alloy.
7. The method for preparing the one-piece aluminum alloy hanger with round corners at the edges according to claim 2, wherein the aluminum alloy bar is heated to a semi-molten state temperature of 450-490 ℃ in step S11.
8. The method for preparing the integrated aluminum alloy hanging buckle with the round corners at the edges according to claim 1, wherein the aluminum alloy hanging buckle is any one of an aluminum alloy key buckle, an aluminum alloy luggage buckle and an aluminum alloy mountain climbing buckle.
9. An integrated aluminum alloy hanging buckle with round corners at the edge, which is prepared by the preparation method of the integrated aluminum alloy hanging buckle with round corners at the edge as claimed in any one of claims 1 to 8, and is characterized by further comprising the following steps: the main part, main part body coupling in the linking arm is kept away from the one end of joint couple, elasticity hang the arm with be formed with groove structure between the main part.
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