阅读说明：本技术 弧形铝质抱箍、生产抱箍的模具及生产抱箍的工艺方法 (Arc-shaped aluminum hoop, mold for producing hoop and process method for producing hoop ) 是由 姚建生 朱小强 费小玲 姚栋宇 刘松明 程毛迪 徐炎炎 程广荣 于 2021-03-03 设计创作，主要内容包括：本发明涉及管道连接设备领域,具体涉及一种弧形铝质抱箍、生产抱箍的模具及生产抱箍的工艺方法。所述弧形铝质抱箍包括箍体,所述箍体是锻造一体成型,所述箍体为四分之一圆环的弧形,其分为内弧面和外弧面,所述箍体的外弧面两侧一体化设有连接凸起,所述连接凸起上开设有凹槽,所述凹槽内设有连接孔,所述箍体的内弧面为凹凸结构；所述箍体为锻铝材质；所述箍体四个合成为一个整体圆环后套设在管道的外面。本发明可通过锻造工艺一体化成型,整体结构简单,易于成型,且消除了铸铝在冶炼过程中产生的铸态疏松等缺陷,优化微观组织结构,同时保存了完整的金属流线,提高了锻铝的机械性能,达到型体轻便、用料少、节约成本的效果。(The invention relates to the field of pipeline connecting equipment, in particular to an arc-shaped aluminum hoop, a mould for producing the hoop and a process method for producing the hoop. The arc-shaped aluminum hoop comprises a hoop body, wherein the hoop body is integrally formed by forging, the hoop body is in an arc shape of a quarter of a circular ring and is divided into an inner arc surface and an outer arc surface, connecting protrusions are integrally arranged on two sides of the outer arc surface of the hoop body, grooves are formed in the connecting protrusions, connecting holes are formed in the grooves, and the inner arc surface of the hoop body is in a concave-convex structure; the hoop body is made of forged aluminum; the four hoop bodies are combined into a whole circular ring and then sleeved outside the pipeline. The invention can be integrally formed by a forging process, has simple integral structure and easy forming, eliminates the defects of cast-state looseness and the like generated in the smelting process of cast aluminum, optimizes the microstructure, simultaneously saves the complete metal streamline, improves the mechanical property of the forged aluminum, and achieves the effects of light profile, less material consumption and cost saving.)

1. The utility model provides an arc aluminium matter staple bolt, includes the hoop body, its characterized in that: the hoop body is forged into an integral whole, the hoop body is an arc of a quarter ring and is divided into an inner arc surface and an outer arc surface, connecting protrusions are integrally arranged on two sides of the outer arc surface of the hoop body, grooves are formed in the connecting protrusions, connecting holes are formed in the grooves, and the inner arc surface of the hoop body is of a concave-convex structure.

2. The arc-shaped aluminum hoop according to claim 1, wherein: the hoop body is made of forged aluminum.

3. The arc-shaped aluminum hoop according to claim 1, wherein: the four hoop bodies are combined into an integral circular ring and then sleeved outside the pipeline, and adjacent hoop bodies are fixed through a bolt structure.

4. The die for manufacturing the arc-shaped aluminum hoop according to claim 1, is characterized in that: the die comprises an upper die holder and a lower die holder, the upper die holder and the lower die holder are fixed in a clamping manner, an arc-shaped groove is formed in one surface, close to the upper die holder, of the lower die holder, the arc-shaped groove longitudinally penetrates through the lower die holder, a lower die cavity is arranged in the middle of the arc-shaped groove, arc-shaped strip boundaries extend from two longitudinal sides of the lower die cavity, and the lower die cavity corresponds to the outer arc surface of the hoop body; an arc-shaped bulge is arranged on one surface of the upper die holder, which is close to the lower die holder, an upper die cavity is arranged in the middle of the arc-shaped bulge, and the upper die cavity corresponds to the inner arc surface of the hoop body; the arc-shaped groove is matched with the arc-shaped bulge.

5. The mold for producing the arc-shaped aluminum hoop according to claim 4, wherein: the two transverse ends of the lower die cavity are provided with convex forming structures; and longitudinal limiting supporting platforms are arranged at the two transverse ends of the arc-shaped groove and are arranged on the U-shaped platform of the lower die holder.

6. The mold for producing the arc-shaped aluminum hoop according to claim 4, wherein: arc-shaped strip-shaped bulges are arranged at the two longitudinal sides of the arc-shaped groove, the arc-shaped strip-shaped bulges are positioned at the outer sides of the arc-shaped strip-shaped boundaries, and a groove is formed between the arc-shaped strip-shaped bulges and the arc-shaped strip-shaped boundaries; the lower die holder is a cuboid, and concave-shaped concave buckles are arranged at four corners of the lower die holder.

7. The mold for producing the arc-shaped aluminum hoop according to claim 4, wherein: a stripe structure is arranged in the upper die cavity; the upper die base is a cuboid, four corners of the upper die base are provided with convex lock catch structures, and the lock catch structures are convex buckles.

8. The process method for producing the arc-shaped aluminum hoop according to claim 1 is characterized by comprising the following steps:

(1) manufacturing a mould: manufacturing a corresponding forging die according to the geometric dimension and the outline of the hoop;

(2) preheating: heating an alloy bar made of forged aluminum to a forging temperature;

(3) pre-forging: forging an arc forging blank with a shape similar to that of the hoop by adopting a free forging process;

(4) secondary heating: heating the pre-forged blank again to reach the forging temperature;

(5) forging and forming: performing final forming forging on the blank heated to the forging temperature;

(6) and (3) trimming: under the room temperature state, cutting off the residual edges around the formed hoop forging stock through a trimming die to obtain a finished product;

(7) and (3) heat treatment: firstly carrying out solution treatment and then carrying out tempering treatment.

9. The process method of the arc-shaped aluminum hoop according to claim 8, wherein: in this process, the process conditions are controlled as follows,

(1) the preheating and secondary heating temperature is between 460 ℃ and 500 ℃, and the heating and heat preservation time is between 2.5 hours and 3.5 hours;

(2) the heat treatment process comprises the following processes:

A. carrying out solution aging treatment, namely T6 treatment, heating to 520-530 ℃, keeping the temperature for not less than 300 minutes, and rapidly cooling by water after keeping the temperature, wherein the water cooling temperature is 45-55 ℃;

B. the tempering temperature is between 165 and 185 ℃, the heat preservation time is not less than 180 minutes, and the hardness is not less than HB 95-120.

Technical Field

The invention relates to the field of pipeline connecting equipment, in particular to an arc-shaped aluminum hoop, a mould for producing the hoop and a process method for producing the hoop.

Background

The casting is a manufacturing process of pouring molten metal into a casting mold, and cooling and solidifying to obtain a part with required shape and performance. The casting is a common manufacturing method, has low manufacturing cost and great process flexibility, can obtain castings with complex shapes and large sizes, and has great specific gravity in mechanical manufacturing; forging is one of important methods for plastic working of metals, and involves forming a metal material in a plastic state into a workpiece having a certain shape and size by hammering or the like and changing its physical properties. The main objective of forging is shaping and modification (improvement of mechanical properties and internal structure). The latter is difficult to realize by other process methods, and in addition, the forging production also has the advantages of metal saving, high production efficiency, high flexibility and the like. The porosity and pores in the cast structure can be compacted by forging, the coarse cast structure (dendritic crystal grains) is crushed into fine crystal grains, and a fiber structure is formed. The mechanical properties of the part can be improved when the fibrous texture is reasonably distributed along the contour of the part. Thus, the forged part has high strength and can withstand greater impact loads. Under the condition of bearing the same impact load, the size of the forged part can be reduced, namely, metal is saved; the cast aluminum is a technological method that the aluminum in a molten state is poured into a mould and cooled to form an aluminum piece with a required shape. Aluminum used for casting aluminum is called as cast aluminum alloy.

Staple bolt among the prior art is two articulated or through the fixed semicircle loops of bolt structure on the whole, and it is formed by casting process pouring, and its mechanical properties is not good, and is big like the structure, and the defect is many etc. and casting quality is unstable, and the process is many, and the influence factor is complicated, easily produces many defects, and it is difficult to demold in the casting process, in case the drawing of patterns is improper, will damage the product, has reduced the quality of product, and then influences the manufacturing cost of enterprise. The defects of casting-state looseness and the like generated in the smelting process of metal can be eliminated through forging, the microstructure is optimized, meanwhile, due to the fact that a complete metal streamline is saved, the mechanical property of a forging piece is generally superior to that of a casting piece made of the same material, and the problem that demolding is difficult to achieve exists when a semi-ring is forged in the prior art.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides the arc-shaped aluminum hoop which is simple in structure and can be integrally formed through a forging process.

The technical scheme provided by the invention is as follows: the utility model provides an arc aluminium matter staple bolt, includes the hoop body, the hoop body forges integrated into one piece, the hoop body is the arc of quarter ring, and it divide into intrados and extrados, the integration of the extrados both sides of the hoop body is equipped with the connection arch, set up flutedly on the connection arch, be equipped with the connecting hole in the recess, the intrados of the hoop body is concave-convex structure.

Further optimization and improvement of the scheme are as follows: the hoop body is made of forged aluminum.

Further optimization and improvement of the scheme are as follows: the four hoop bodies are combined into an integral circular ring and then sleeved outside the pipeline, and adjacent hoop bodies are fixed through a bolt structure.

A die for manufacturing an arc-shaped aluminum hoop comprises an upper die holder and a lower die holder, wherein the upper die holder and the lower die holder are fixed in a clamping mode, an arc-shaped groove is formed in one surface, close to the upper die holder, of the lower die holder, the arc-shaped groove longitudinally penetrates through the lower die holder, a lower die cavity is formed in the middle of the arc-shaped groove, arc-shaped strip boundaries extend from two longitudinal sides of the lower die cavity, and the lower die cavity corresponds to the outer arc surface of a hoop body; an arc-shaped bulge is arranged on one surface of the upper die holder, which is close to the lower die holder, an upper die cavity is arranged in the middle of the arc-shaped bulge, and the upper die cavity corresponds to the inner arc surface of the hoop body; the arc-shaped groove is matched with the arc-shaped bulge.

Further optimization and improvement of the scheme are as follows: the two transverse ends of the lower die cavity are provided with convex forming structures; and longitudinal limiting supporting platforms are arranged at the two transverse ends of the arc-shaped groove and are arranged on the U-shaped platform of the lower die holder. The upper end of the longitudinal limiting supporting platform is a horizontal plane, the upper end of the longitudinal limiting supporting platform is in close contact with the upper die base and plays a supporting role, and when the forged aluminum material is forged, the longitudinal size of the forged aluminum material is limited, so that the forged aluminum material is prevented from deviating from a preset specification; after the upper die base and the lower die base are clamped and fixed, a U-shaped groove is formed between the U-shaped platform and the upper die base, and when the forged aluminum material is forged and pressed, the flash of the transverse forging and extruding of the forged aluminum material overflows from the U-shaped groove.

Further optimization and improvement of the scheme are as follows: the arc-shaped groove is characterized in that arc-shaped strip-shaped bulges are arranged at two longitudinal sides of the arc-shaped groove, the arc-shaped strip-shaped bulges are positioned at the outer sides of the arc-shaped strip-shaped boundaries, a groove is formed between the arc-shaped strip-shaped bulges and the arc-shaped strip-shaped boundaries, the groove has the same function as the U-shaped platform, and is used for solving the problem of flash and used for accommodating the forged longitudinal flash; the lower die holder is a cuboid, and concave-shaped concave buckles are arranged at four corners of the lower die holder.

Further optimization and improvement of the scheme are as follows: a stripe structure is arranged in the upper die cavity; the upper die base is a cuboid, four corners of the upper die base are provided with convex lock catch structures, and the lock catch structures are convex buckles. The convex buckle and the concave buckle of the lock catch structure are mutually clamped, so that the upper die base and the lower die base are stably combined together after being mutually positioned.

The process method for producing the arc-shaped aluminum hoop comprises the following steps:

(1) manufacturing a mould: and manufacturing a corresponding forging die according to the geometric dimension and the outline of the hoop.

(2) Preheating: the alloy bar made of forged aluminum is heated to reach the forging temperature.

(3) Pre-forging: and forging the arc forging stock with the shape similar to that of the hoop by adopting a free forging process. The preforging is to deform the blank to the shape and size close to the forging, so that when finish forging is carried out, the die cavity is easily filled with metal, the wear of the die cavity is reduced while the material consumption is reduced, and the service life of the forging die is prolonged.

(4) Secondary heating: and heating the pre-forged blank again to the forging temperature.

(5) Forging and forming: the blank heated to the forging temperature is subjected to final form forging.

(6) And (3) trimming: and under the room temperature state, cutting off the residual edges around the formed hoop forging stock through a trimming die.

(7) And (3) heat treatment: firstly carrying out solution treatment and then carrying out tempering treatment.

Further optimization and improvement of the scheme are as follows: in this process, the process conditions are controlled as follows,

(1) the preheating and secondary heating temperature is between 460 ℃ and 500 ℃, and the heating and heat preservation time is between 2.5 hours and 3.5 hours.

(2) The heat treatment process comprises the following processes:

A. and (3) carrying out solution aging treatment, namely T6 treatment, heating to 520-530 ℃, keeping the temperature for not less than 300 minutes, and rapidly cooling by water after keeping the temperature, wherein the water cooling temperature is 45-55 ℃.

B. The tempering temperature is between 165 and 185 ℃, the heat preservation time is not less than 180 minutes, and the hardness is not less than HB 95-120.

Compared with the prior art, the invention has the following beneficial effects: the anchor ear is integrally formed by a forging process, the forming process is simple, the production cost can be reduced, the production speed is accelerated, the defects of casting state looseness and the like generated in the smelting process of cast aluminum are eliminated by the forging process, the microstructure is optimized, the complete metal streamline is saved, and the mechanical property of the forged aluminum is improved, so that the produced anchor ear is simple in integral structure, easy to form, good in quality, and capable of achieving the effects of less material consumption, light in shape and cost saving; the corresponding forging die is simple in structure, easy to manufacture and good in forming effect.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the present invention.

Fig. 3 is a perspective view of the inventive die.

FIG. 4 is an exploded view of the upper and lower die sets of the present invention.

FIG. 5 is a schematic structural view of the lower die holder of the present invention.

FIG. 6 is a schematic structural diagram of the upper die holder according to the present invention.

Fig. 7 is a cross-sectional view of the hoop of the present invention positioned in a mold.

Fig. 8 is a perspective view of the trimming die of the present invention.

FIG. 9 is a schematic structural view of a lower die of the trimming die of the present invention.

FIG. 10 is a schematic structural view of an upper die of the trimming die of the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

As shown in fig. 1 and 2, an arc aluminum hoop comprises a hoop body 1, wherein the hoop body 1 is integrally formed by forging aluminum, the hoop body is an arc of a quarter ring and is divided into an inner arc surface 11 and an outer arc surface 12, two sides of the outer arc surface 12 of the hoop body 1 are integrally provided with a connecting protrusion 13, the connecting protrusion 13 is provided with a groove 14, the groove 14 is internally provided with a connecting hole 15, and the inner arc surface 11 of the hoop body 1 is of a concave-convex structure 16. Four hoop bodies 1 are combined into an integral circular ring and then sleeved outside the pipeline, and adjacent hoop bodies 1 are fixed through bolt structures and then sleeved on the pipeline.

As shown in fig. 3 to 7, in order to manufacture the mold 2 for the arc-shaped aluminum hoop, the mold includes an upper mold base 3 and a lower mold base 4, the upper mold base 3 and the lower mold base 4 are fixed in a clamping manner, an arc-shaped groove 41 is provided on one surface of the lower mold base 4 close to the upper mold base 3, the arc-shaped groove 41 longitudinally penetrates through the lower mold base 4, a lower mold cavity 42 is provided in the middle of the arc-shaped groove 41, arc-shaped strip boundaries 43 extend from both longitudinal sides of the lower mold cavity 42, and the lower mold cavity 42 corresponds to the outer arc surface 12 of the hoop body; an arc-shaped bulge 31 is arranged on one surface of the upper die holder 3 close to the lower die holder 4, an upper die cavity 32 is arranged in the middle of the arc-shaped bulge 31, and the upper die cavity corresponds to the inner arc surface 11 of the hoop body; the arc-shaped groove 41 is matched with the arc-shaped protrusion 31.

The two transverse ends of the lower die cavity 42 are provided with convex forming structures 44; the horizontal both ends of arc recess 41 are equipped with vertical spacing support platform 45, vertical spacing support platform 45 sets up on the U type platform 46 of die holder 4.

Arc-shaped strip-shaped bulges 47 are arranged on two longitudinal sides of the arc-shaped groove 41, the arc-shaped strip-shaped bulges 47 are positioned on the outer side of the arc-shaped strip-shaped boundary 43, a groove 48 is formed between the arc-shaped strip-shaped bulges and the arc-shaped strip-shaped boundary, and in order to ensure that the upper die holder 3 is matched with the lower die holder 4 in a sealing way, the heights of the arc-shaped strip-shaped bulges 47 and the upward bulges of the arc-shaped strip-shaped boundary 43 are the same at the; the lower die holder 3 is a cuboid, and concave buckles 49 are arranged at four corners of the cuboid.

A stripe structure 33 is arranged in the upper die cavity 32 and used for forming a concave-convex structure of the inner arc surface of the hoop; the upper die base 3 is also a cuboid, four corners of the upper die base are provided with convex lock catch structures 34, and the lock catch structures 34 are matched with the concave buckles 49 in a sealing and clamping manner so as to fix the upper die base 3 and the lower die base 4.

As shown in fig. 8 to 10, the trimming die 5 for cutting off the flash of the arc-shaped aluminum hoop of the present invention comprises a lower die 51 and an upper die 52, wherein the upper end surface of the lower die 51 of the trimming die is provided with a hoop groove 53 corresponding to the arc-shaped aluminum hoop, the hoop groove 53 vertically penetrates through the lower die 51, and a flash support table 56 is erected on the periphery of the hoop groove; the lower end face of the upper die 52 is an arc-shaped protruding table 54, one face, close to the hoop groove 53, of the arc-shaped protruding table 54 is further provided with an arc-shaped strip protruding strip 57, the arc-shaped strip protruding strip 57 is clamped in a groove of the arc-shaped aluminum hoop concave-convex structure 16, arc-shaped aluminum is displaced during edge cutting to influence the edge cutting effect, the two transverse ends of the arc-shaped protruding table 54 extend to form stand feet 55, the end portions of the stand feet 55 are conical and are convenient to embed into the hoop groove 53, during edge cutting, the arc-shaped aluminum hoop is placed in the hoop groove 53, the upper die 52 is embedded into the hoop groove 53, cutting of the arc-shaped aluminum hoop can be achieved, the upper die 52 is moved upwards after the die is cut, the arc-shaped aluminum hoop is taken out, the edge cutting die is simple in structure, the operation process is simple, and convenience in manufacturing is achieved.

The process method for producing the arc-shaped aluminum hoop comprises the following steps:

(1) manufacturing a mould: and manufacturing a corresponding forging die according to the geometric dimension and the outline of the hoop.

(2) Preheating: the alloy bar made of forged aluminum is heated to reach the forging temperature.

(3) Pre-forging: and forging a blank with a shape similar to that of the hoop by adopting a free forging process.

(4) Secondary heating: and heating the pre-forged blank again to the forging temperature.

(5) Forging and forming: the blank heated to the forging temperature is subjected to final form forging.

(6) And (3) trimming: and under the room temperature state, cutting off the residual edge around the formed hoop forging stock through a trimming die to obtain a finished product.

(7) And (3) heat treatment: firstly carrying out solution treatment and then carrying out tempering treatment.

The technological process of producing arced aluminum hoop includes the following steps,

(1) the preheating and secondary heating temperature is between 460 ℃ and 500 ℃, and the heating and heat preservation time is between 2.5 hours and 3.5 hours.

(2) In the process of heat treatment:

A. carrying out solution aging treatment, namely T6 treatment, heating to 520-530 ℃, keeping the temperature for not less than 300 minutes, cooling by water after keeping the temperature, and cooling by water to 45-55 ℃; t6 is a heat treatment process for wrought aluminium alloys (as distinguished from cast aluminium alloys) and is a process of "solution treatment (for steel this process is called" quenching ") + artificial ageing" where the main factors are solution temperature, quenching rate (determined by the quenching medium), ageing temperature, holding time, ageing order (first or multi stage ageing).

B. The tempering temperature is between 165 and 185 ℃, the heat preservation time is not less than 180 minutes, and the hardness is not less than HB 95-120.

It is to be understood that the above-described embodiments are only a few, and 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.