CN109266982B - Aging shaping method for large aluminum alloy ring piece - Google Patents
Aging shaping method for large aluminum alloy ring piece Download PDFInfo
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- CN109266982B CN109266982B CN201811448939.9A CN201811448939A CN109266982B CN 109266982 B CN109266982 B CN 109266982B CN 201811448939 A CN201811448939 A CN 201811448939A CN 109266982 B CN109266982 B CN 109266982B
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
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Abstract
The invention discloses an aging shaping method of a large aluminum alloy ring piece, which comprises the following steps: measuring the outer circumference of the aluminum alloy ring piece, equally dividing the whole ring N of the aluminum alloy ring piece by the standard arc length, and marking equal division points; fixedly mounting a clamping plate at each equant point of the aluminum alloy ring piece, placing a centering piece at the center of the aluminum alloy ring piece, and respectively connecting each clamping plate with the corresponding equant point on the centering piece through a pull rod with adjustable length; adjusting the length of each pull rod to enable the outer diameter difference of the aluminum alloy ring piece at each equant point to be within a preset allowable error range; charging and carrying out aging treatment; and carrying out slow cooling in the furnace after the aging heat preservation is carried out for a preset time. By applying the aging shaping method, synchronous aging and circle correcting shaping of the ring can be realized, and the cost of deformation shaping after solution quenching of large aluminum alloy rings of 10m and the like is obviously reduced.
Description
Technical Field
The invention relates to the technical field of aluminum alloy processing, in particular to an aging shaping method of a large aluminum alloy ring piece.
Background
The structure and performance required by the material can be obtained by solution quenching and aging of the heat-treated reinforced aluminum alloy, an aluminum alloy workpiece needs to be rapidly quenched in water after high-temperature solution quenching, the workpiece is quenched and deformed due to nonuniform cooling of the workpiece during quenching, the deformation of the large aluminum alloy ring after solution quenching is large, the out-of-roundness does not meet the requirement, and the problem that how to reduce the deformation of the ring is required to be solved in the subsequent process is solved.
In general, the aluminum alloy ring piece is directly placed on a material frame or a material rest for aging heat treatment, no tool is needed to be added to the ring piece, the ring piece is in an unconstrained state in the aging process, the shape and the size of the ring piece are basically consistent before and after aging, and the non-roundness of the ring piece cannot be reduced by the aging method.
In summary, how to effectively solve the problems that the deformation of the large aluminum alloy ring piece after solution quenching is very large and the out-of-roundness requirement is difficult to meet is the problem that needs to be solved by the technical personnel in the field at present.
Disclosure of Invention
In view of the above, the invention aims to provide an aging shaping method for a large aluminum alloy ring piece, which can effectively solve the problem that the large aluminum alloy ring piece deforms greatly after solution quenching so as to meet the requirement of out-of-roundness.
In order to achieve the purpose, the invention provides the following technical scheme:
the aging shaping method of the large aluminum alloy ring piece comprises the following steps:
measuring the outer circumference of the aluminum alloy ring piece, determining the outer diameter of a standard circle corresponding to the outer circumference, calculating to obtain the standard arc length of each section corresponding to N equal divisions of the standard circle according to the outer diameter of the standard circle, dividing the whole ring of the aluminum alloy ring piece into N equal divisions according to the standard arc length, and marking equal division points, wherein N is a positive integer greater than or equal to 3;
fixedly mounting a clamping plate at each equant point of the aluminum alloy ring piece, placing a centering piece at the center of the aluminum alloy ring piece, dividing the centering piece into N equal parts correspondingly, and respectively connecting each clamping plate with the corresponding equant point on the centering piece through a pull rod with adjustable length;
adjusting the length of each pull rod to enable the outer diameter difference of the aluminum alloy ring piece at each equant point to be within a preset allowable error range;
charging and carrying out aging treatment;
slowly cooling in the furnace after the aging heat preservation is carried out for the preset time, and discharging the aluminum alloy ring piece when the temperature of the aluminum alloy ring piece is reduced to a first preset temperature;
and when the temperature of the aluminum alloy ring piece is reduced to a second preset temperature, the clamping plate is dismounted, wherein the second preset temperature is lower than the first preset temperature.
Preferably, in the age shaping method, the adjusting the length of each pull rod to make the difference in outer diameter of the aluminum alloy ring at each bisecting point within a preset allowable error range specifically includes:
adjusting the length of each pull rod to enable the aluminum alloy ring piece to be in a free state, and measuring the outer diameter of the aluminum alloy ring piece corresponding to the position of each clamping plate;
and adjusting the length of each pull rod according to the outer diameter of the aluminum alloy ring corresponding to the position of the clamping plate, so that the outer diameter difference of the aluminum alloy ring at each equant point is within a preset allowable error range.
Preferably, in the aging shaping method, after the aging heat preservation is performed for a preset time, slow cooling is performed in the furnace, and when the temperature of the aluminum alloy ring piece is reduced to a first preset temperature, the discharging is performed, which specifically includes:
after the aging heat preservation is carried out for the preset time, the heat treatment furnace is powered off, a door seam with the preset width of the heat treatment furnace door is opened, and a fan is started;
when the temperature in the furnace is reduced to a third preset temperature, closing the furnace door and keeping the fan open;
and discharging the aluminum alloy ring piece when the temperature of the aluminum alloy ring piece is reduced to a first preset temperature, wherein the third preset temperature is higher than the first preset temperature.
Preferably, in the aging shaping method, the first preset temperature ranges from 60 ℃ to 65 ℃, the third preset temperature ranges from 110 ℃ to 120 ℃, and the second preset temperature is room temperature.
Preferably, in the above age shaping method, after the removing the clip board, the method further includes:
and measuring the out-of-roundness of the aluminum alloy ring piece.
Preferably, in the age shaping method, the centering element includes a centering cylinder and a cross-shaped center plate fixedly connected to the centering cylinder, where the length of the cross-shaped center plate is equal to that of the centering cylinder, and the cross-shaped intersection point is the center of the centering cylinder, so that the centering element is placed at the center of the aluminum alloy ring, specifically including:
and placing the centering cylinder in the aluminum alloy ring piece, and adjusting the position of the aluminum alloy ring piece to enable the circle center of the centering cylinder to be located at the center of the aluminum alloy ring piece.
Preferably, in the above age shaping method, the clip plate is U-shaped, and the fixing of the clip plate at each bisector of the aluminum alloy ring specifically includes:
and arranging a clamping plate at each equant point of the aluminum alloy ring piece and clamping the aluminum alloy ring piece in the U-shaped groove.
Preferably, in the above age shaping method, the connecting each of the fastening plates with the corresponding bisector on the centering member through a length-adjustable tie rod respectively specifically includes:
two pull rods with adjustable lengths are respectively arranged corresponding to the clamping plates, one ends of the two pull rods are respectively connected with two vertical sides of the U-shaped clamping plate, and the other ends of the two pull rods are respectively connected with the upper end and the lower end of the corresponding equal division point on the centering piece.
Preferably, in the age shaping method, the pull rod includes a fixed rod, a movable rod and a sleeve, one end of the fixed rod is clamped at one end of the sleeve and is rotatably connected to the sleeve, the other end of the fixed rod is fixedly connected to the centering member, the other end of the sleeve is in threaded connection with one end of the movable rod, and the other end of the movable rod is fixedly connected to the clamping plate, so that the length of each pull rod is adjusted, specifically including:
the sleeve of each pull rod is rotated to adjust the distance between the movable rod and the fixed rod so as to adjust the length of each pull rod.
By applying the aging shaping method of the large aluminum alloy ring piece, provided by the invention, the aging size of the aluminum alloy ring piece is detected, equally divided and marked, then the corresponding clamping plate, the pull rod and the centering piece are pre-installed, the length of each pull rod is measured and adjusted and fixed, so that the outer diameter difference of the aluminum alloy ring piece at each equally divided point is within the preset allowable error range, and at the moment, the ring piece is in a stressed state. And finally, furnace charging and aging treatment are carried out, and the aluminum alloy ring piece is subjected to stress relaxation in the aging long-time heating process. After the aging is finished, the steel plate is discharged after being slowly cooled in the furnace, and new stress and deformation caused by quick temperature drop during discharging are prevented. And discharging, continuously cooling and then removing the tool, so that the internal stress of the aluminum alloy ring piece is in a relatively low and stable state after the aging is finished, and the shape with the same diameter can be still kept, thereby realizing the rounding and shaping of the aluminum alloy ring piece. By adopting the process and adopting the aging and shaping synchronous technology, the ring piece is subjected to roundness correction and shaping while the ring piece performance is strengthened by aging. Under the condition of low production capacity of large aluminum alloy ring pieces of 10m grade and the like, synchronous aging and circle correction and shaping of the aluminum alloy ring pieces can be realized only by inputting very low tooling preparation cost, and the size after circle correction can meet the machining allowance requirement of large aluminum alloy ring pieces of 10m grade and the like, so that the huge equipment input cost of a large creep aging furnace of the large aluminum alloy of 10m grade and the like is saved.
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, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an aging shaping tool according to an embodiment of the present invention.
The drawings are numbered as follows:
the aluminum alloy ring piece comprises an aluminum alloy ring piece 1, a circle center plate 2, a centering cylinder 3, a pull rod 4, a sleeve 5 and a clamping plate 6.
Detailed Description
The embodiment of the invention discloses an aging shaping method of a large aluminum alloy ring piece, which is used for shaping deformation of the large aluminum alloy ring piece after solution quenching, so that the out-of-roundness requirement is met.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
In a specific embodiment, the aging shaping method of the large aluminum alloy ring piece provided by the invention comprises the following steps:
s1: measuring the outer circumference of the aluminum alloy ring member 1, determining the outer diameter of a standard circle corresponding to the outer circumference, calculating the outer diameter of the standard circle to obtain the standard arc length of each section corresponding to N equal divisions of the standard circle, dividing the whole ring of the aluminum alloy ring member 1 into N equal divisions by the standard arc length, and marking equal division points, wherein N is a positive integer larger than 3.
First, the outer circumference of the large aluminum alloy ring 1 is measured, and it should be noted that the large aluminum alloy ring 1 mentioned in this application refers to 10 grades or more. The following specification of an aluminum alloy ring 1 is given as an example: the aluminum alloy ring piece 1 is an extra-large aluminum alloy ring forging required by a 10 m-grade heavy carrier rocket, is made of 2219 heat treatment-reinforced aluminum alloy, is formed by ring rolling after ingot casting and blank making, and has the outer diameter phi 9500-phi 9620mm, the wall thickness of 120-160 mm and the height of 600-700 mm.
Due to the fact that the roundness of the aluminum alloy ring piece 1 is irregular, the whole outer circumference of the aluminum alloy ring piece 1 needs to be measured, and then the standard outer diameter of the aluminum alloy ring piece 1 is calculated. For example: and the outer circumference of the measuring ring piece is 30159mm, and the corresponding standard circle outer diameter of the aluminum alloy ring piece 1 is phi 9600 mm. And dividing the aluminum alloy ring 1 into N equal parts according to requirements, wherein N is a positive integer greater than or equal to 3, such as 3 equal parts, 6 equal parts, 9 equal parts and the like. In the following embodiments, 12 equal parts are taken as examples, and the standard arc length of each segment corresponding to the 12 equal parts of the standard circle is 2513.25mm obtained by calculating the outer diameter of the standard circle.
According to the standard arc length, dividing the whole ring 12 of the aluminum alloy ring member 1 equally, making equally divided point marks on equally divided end faces, and specifically, respectively printing position marks by using a steel seal: 1,2,3,4,5,6,7,8,9, 10, 11, 12.
S2: clamping plates 6 are fixedly arranged at each equant point of the aluminum alloy ring piece 1, a centering piece is arranged at the center of the aluminum alloy ring piece 1, the centering piece is divided into N equal parts correspondingly, and each clamping plate 6 is connected with the corresponding equant point on the centering piece through a pull rod 4 with adjustable length.
That is to set up ageing plastic frock to aluminum alloy ring 1, this frock is including being used for N cardboard 6 with the N halving point of aluminum alloy ring 1 can dismantle fixed connection, the centering piece that is used for confirming the centre of a circle, the corresponding 12 halving of centering piece also, each cardboard 6 is connected with the centering piece through length-adjustable pull rod 4, that is to say that one end of each pull rod 4 is used for being connected with the different cardboard 6 of aluminum alloy ring 1 respectively, the other end is used for being connected with the corresponding different halving point on the centering piece respectively. And pre-installing the aging shaping tool after finishing the size detection, 12 equal division and identification of the aluminum alloy ring piece 1 before aging. Namely, a centering piece is placed at the center of the aluminum alloy ring piece 1, and the center of the whole tool is determined through the centering piece, for example, the center of the centering piece is taken as the center of the whole tool. And (4) mounting a clamping plate 6 at each equant point of the aluminum alloy ring piece 1 and mounting a pull rod 4.
S3: and adjusting the length of each pull rod 4 to ensure that the difference of the outer diameters of the aluminum alloy ring 1 at each equant point is within a preset allowable error range.
After the pull rods 4 are installed, the length of each pull rod 4 is adjusted to enable the outer diameter difference of the aluminum alloy ring 1 at each equant point to be within a preset allowable error range, and each connecting rod is fixed under the corresponding length respectively, so that the outer diameter of the aluminum alloy ring 1 is restrained. The specific preset allowable error range can be set as required, and when the aluminum alloy ring piece 1 corresponds to the above specification, the preset allowable error can be 8mm, that is, the outer diameter difference of the aluminum alloy ring piece 1 at each bisector is within 8 mm.
S4: charging and carrying out aging treatment.
After the aging shaping tool is fixed, the aging shaping tool and the aluminum alloy ring piece 1 are integrally arranged in a heat treatment furnace for aging treatment, and the specific aging treatment parameters such as the temperature, the heat preservation time and the like of the aging treatment can refer to the conventional aging process in the prior art, and are not particularly limited here.
S5: and (4) after the aging heat preservation is carried out for the preset time, slow cooling is carried out in the furnace, and the aluminum alloy ring piece 1 is discharged when the temperature is reduced to the first preset temperature.
Namely, after the aging heat preservation is finished, the aluminum alloy ring piece 1 is left in the furnace for slow cooling, and when the temperature of the aluminum alloy ring piece 1 is reduced to a first preset temperature, the aluminum alloy ring piece is discharged from the furnace, so that new stress and deformation caused by rapid temperature reduction of the aluminum alloy ring piece are prevented. The first preset temperature is 60-65 deg.c, preferably 60 deg.c.
S6: when the temperature of the aluminum alloy ring 1 is reduced to a second preset temperature, the clamping plate 6 is removed, wherein the second preset temperature is lower than the first preset temperature.
After the aluminum alloy ring piece 1 is discharged from the furnace, the clamping plate 6 can be removed when the temperature of the aluminum alloy ring piece 1 is continuously reduced to the second preset temperature, so that the internal stress of the ring piece is in a relatively low and stable state after the aging of the ring piece is completed, the shape with the same diameter can be still kept, and the circle correction and shaping of the ring piece are realized. The specific second preset temperature is preferably room temperature.
By applying the aging shaping method of the large aluminum alloy ring 1 provided by the invention, the aging size of the aluminum alloy ring 1 is detected, equally divided and marked, then the corresponding clamping plate 6, the pull rod 4 and the centering piece are pre-installed, the length of each pull rod 4 is measured and adjusted, and the length is fixed, so that the outer diameter difference of the aluminum alloy ring 1 at each equally divided point is within a preset allowable error range, and the ring is in a stressed state. And finally, furnace charging and aging treatment are carried out, and the aluminum alloy ring piece 1 is subjected to stress relaxation in the aging long-time heating process. After the aging is finished, the steel plate is discharged after being slowly cooled in the furnace, and new stress and deformation caused by quick temperature drop during discharging are prevented. And (4) discharging, continuously cooling and then removing the tool, so that the internal stress of the aluminum alloy ring piece 1 is in a relatively low and stable state after aging is completed, and the shape with the same diameter can still be kept, thereby realizing the rounding and shaping of the aluminum alloy ring piece 1. Of course, the constant diameter means that the outer diameter at different positions can be maintained within an allowable error range. By adopting the process and adopting the aging and shaping synchronous technology, the ring piece is subjected to roundness correction and shaping while the ring piece performance is strengthened by aging. Under the condition that the production quantity of large aluminum alloy ring pieces 1 of 10m and the like is low, synchronous aging and circle correction and shaping of the aluminum alloy ring pieces 1 can be realized only by extremely low tooling preparation cost, and the size after circle correction can meet the machining allowance requirement of large aluminum alloy ring pieces 1 of 10m and the like, so that the huge equipment investment cost of large creep aging furnaces of 10m and the like is saved.
Further, the step S3 specifically includes:
s31: and adjusting the length of each pull rod 4 to enable the aluminum alloy ring 1 to be in a free state, and measuring the outer diameter of the aluminum alloy ring 1 corresponding to the position of each clamping plate 6.
That is, firstly, when the pull rod 4 is in an unstressed state, the outer diameters of the aluminum alloy ring pieces 1 at the positions of the 12 clamping plates 6 are measured through the circle center, namely the outer diameters in an unconstrained state.
S32: and adjusting the length of each pull rod 4 according to the outer diameter of the aluminum alloy ring 1 corresponding to the position of the clamping plate 6.
The length of the pull rod 4 which needs to be adjusted is correspondingly adjusted according to the measurement result, so that the length of each pull rod 4 can be more efficiently adjusted until the outer diameter difference of the aluminum alloy ring 1 at each equant point is within the preset allowable error range. After the adjustment is completed, the connecting rods are fixed under the corresponding length, so as to restrain the aluminum alloy ring piece 1.
Specifically, the step S5 specifically includes:
s51: and after the aging heat preservation is carried out for the preset time, the heat treatment furnace is powered off, a door seam with the preset width of the heat treatment furnace door is opened, and the fan is started.
Namely, after the aging heat preservation is carried out for the preset time, the heat treatment furnace is powered off, the heat treatment furnace door is opened with a door seam with the preset width for heat dissipation, and the fan is opened to accelerate the air flow and increase the heat dissipation rate. The size of the specific preset width can be set according to needs, and is preferably set to be 25-35mm, and is most preferably set to be 30 mm.
S52: and when the temperature in the furnace is reduced to a third preset temperature, closing the furnace door and keeping the fan open.
And (3) closing the furnace door when the temperature in the furnace is reduced to a third preset temperature along with the reduction of the temperature in the furnace, continuing to open the fan for heat dissipation, and continuing to reduce the temperature of the aluminum alloy ring piece 1 along with the temperature in the furnace. The range of the third preset temperature is preferably 110 to 120 ℃.
S53: and discharging the aluminum alloy ring 1 when the temperature of the aluminum alloy ring is reduced to a first preset temperature, wherein the third preset temperature is higher than the first preset temperature.
Through the arrangement in the furnace slow cooling process, the internal stress of the ring can be in a relatively low and stable state after the ring is aged, and the shape with the same diameter can be still kept.
In the above embodiment, after the card 6 is removed, the method further includes:
s7: the out-of-roundness of the aluminum alloy ring 1 is measured. Through carrying out size detection after ageing shaping is accomplished, measure record aluminum alloy ring 1 size to effectively track ageing shaping effect.
In the above embodiments, the centering element includes the centering cylinder 3 and the center plate 2 which is fixedly connected to the centering cylinder 3 and has an equal length and a cross shape, and the cross point of the cross shape is the center of the centering cylinder 3, and then the step S2 of placing the centering element in the center of the aluminum alloy ring 1 specifically includes:
and placing the centering cylinder 3 in the aluminum alloy ring piece 1, and adjusting the position of the aluminum alloy ring piece 1 to enable the circle center of the centering cylinder 3 to be located at the center of the aluminum alloy ring piece 1.
Specifically, the center plate 2 may be welded in the centering cylinder 3, for example, spot-welded in the centering cylinder 3 to serve as the center of the whole tool. The centering cylinder 3 is placed in the center area of the aluminum alloy ring piece 1, the centering cylinder 3 and the aluminum alloy ring piece 1 are preferably placed on a cushion block, and the thickness of the cushion block is about 30 mm. And measuring the outer diameter of the aluminum alloy ring piece 1, and adjusting the position of the aluminum alloy ring piece 1 to ensure that the centering cylinder 3 is completely positioned in the center of the ring piece. The centering piece is arranged to be the centering cylinder 3 and the circle center plate 2, so that the circle center of the tool can be conveniently determined and placed in the center of the aluminum alloy ring piece 1.
In each of the above embodiments, the clamping plate 6 is U-shaped, and the clamping plate 6 is fixedly installed at each bisector of the aluminum alloy ring 1, which specifically includes:
and arranging a clamping plate 6 at each equal division point of the aluminum alloy ring 1 and clamping the aluminum alloy ring 1 in the U-shaped groove.
That is cardboard 6 includes two vertical sides and fixed connection in the horizontal limit of two vertical limit one ends to form the U-shaped structure, the width of concrete U-shaped cardboard 6 is that the distance between two vertical sides can be according to the corresponding setting of width of aluminum alloy ring 1, so that aluminum alloy ring 1 can block in the inslot of U-shaped. Furthermore, in step S2, the clamping plate 6 is fixedly installed at each bisector of the aluminum alloy ring 1, and in order to install each bisector of the aluminum alloy ring 1 into the U-shaped groove of the clamping plate 6, the clamping plate 6 can exert a constraint on the aluminum alloy ring 1 under the pulling force of the pull rod 4. The clamping plate 6 is convenient to mount with the aluminum alloy ring piece 1 by adopting the structure. Of course, the shape of the clamping plate 6 is not limited to the above shape, and other structures capable of applying constraint to the aluminum alloy ring 1 may be adopted.
Further, connect each cardboard 6 through length-adjustable's pull rod 4 and centering piece on corresponding equant point respectively, specifically include:
two pull rods 4 with adjustable lengths are respectively arranged corresponding to the clamping plates 6, one ends of the two pull rods 4 are respectively connected with two vertical sides of the U-shape of the clamping plates 6, and the other ends of the two pull rods are respectively connected with the upper end and the lower end of the corresponding equal division point on the centering piece.
Namely, when the aluminum alloy ring piece 112 is equally divided, 12 clamping plates 6 and 24 pull rods 4 are correspondingly arranged, every two pull rods 4 correspond to one clamping plate 6 and are respectively connected to the end parts of two vertical edges of the clamping plate 6, and the other ends of the pull rods 4 are connected to the upper end and the lower end of the centering piece corresponding to equal division points, so that the two pull rods 4 at the same equal division point are parallel. And when each equant point of the aluminum alloy ring 1 is respectively arranged in the U-shaped groove of the clamping plate 6, the pull rod 4 corresponding to each equant point restrains the aluminum alloy ring 1 from two sides of the aluminum alloy ring 1 in the thickness direction. In this embodiment, the length of each pull rod 4 is adjusted to make the difference between the outer diameters of the aluminum alloy ring 1 at each bisector point within a preset allowable error range, specifically:
the length of each pull rod 4 is adjusted to enable the difference of the outer diameters of the aluminum alloy ring 1 at each equant point to be within a preset allowable error range, and the lengths of the two pull rods 4 corresponding to the same equant point are equal.
On the basis of above-mentioned each embodiment, pull rod 4 includes dead lever, movable rod and sleeve 5, and the one end card of dead lever rotates in sleeve 5's one end and with sleeve 5 to be connected, the other end and the centering piece fixed connection of dead lever, the other end of sleeve 5 and the one end threaded connection of movable rod, the other end and the 6 fixed connection of cardboard of movable rod then adjust the length of each pull rod 4, specifically include:
the sleeve 5 of each pull rod 4 is rotated to adjust the distance between the movable rod and the fixed rod and thus the length of each pull rod 4.
Specifically, the one end of sleeve 5 can set up the flange, and one section joint of dead lever is in the flange, and the flange prevents that the dead lever is deviate from in by sleeve 5, and sleeve 5 can rotate relative to the dead lever. Further, when the sleeve 5 is rotated, the sleeve 5 is in threaded connection with the movable rod, so that the sleeve 5 moves axially relative to the movable rod to change the distance between the movable rod and the fixed rod, that is, the overall length of the pull rod 4. The pull rod 4 is simple in structure and convenient for adjusting the length of the pull rod 4. The two ends of the pull rod 4 can be respectively connected with the clamping plate 6 and the centering member through bolts, in this embodiment, the movable rod is connected with the clamping plate 6 through bolts, and the fixed rod is connected with the centering member through bolts.
When the pull rod 4 adopts the structure, the length of the pull rod 4 is adjusted to be the sleeve 5 of the rotary pull rod 4. When each clamping plate 6 is connected with the corresponding equant points on the centering piece through the pull rod 4, the movable rod and the sleeve 5 can be installed firstly, then the movable rod is connected with the clamping plate 6 through bolts, the fixed rod is connected with the centering piece through the bolts, and the pull rod 4 is in an unstressed state integrally.
In a preferred embodiment, the aging shaping method of the large aluminum alloy ring 1 provided by the invention comprises the following steps: the method comprises the steps of installing an aging tool for the aluminum alloy ring 1 → aging heating, heat preservation → after heat preservation, slightly opening a furnace door seam for cooling → when the temperature in the furnace can be reduced to 110-120 ℃, closing the furnace door → reducing the temperature of the aluminum alloy ring 1 to 60-65 ℃, discharging the aluminum alloy ring 1 from the furnace, reducing the temperature of the aluminum alloy ring 1 to room temperature, and removing the aging tool.
In conclusion, in order to realize accurate shape control in the aging process of the large aluminum alloy ring 1 with the 10m grade and the like, the design and manufacturing research of a large creep aging furnace must be carried out, and the research, development and manufacturing cost is expected to reach more than 4000 ten thousand yuan. According to the invention, under the condition of low production capacity of the large aluminum alloy ring 1 of 10m grade and the like, synchronous aging and circle correction and shaping of the ring can be realized only by investing very little tooling preparation cost, the size after circle correction can also meet the machining allowance requirement of the large aluminum alloy ring 1 of 10m grade and the like, the aluminum alloy ring 1 can obtain required structure and performance after aging, and meanwhile, the out-of-roundness can be controlled within 12 mm. Thereby saving the huge equipment investment cost of the large-scale creep aging furnace of 10 m-grade and other large-scale aluminum alloys.
The aging shaping tool used in the aging shaping method specifically comprises N clamping plates 6 detachably and fixedly connected with N equal division points of the aluminum alloy ring 1 and a centering piece used for determining the circle center, wherein each clamping plate 6 is connected with the centering piece through a pull rod 4 with adjustable length, and N is a positive integer larger than 3. For the detailed structures of the clamping plate 6, the centering member and the connecting rod, please refer to the related expressions in the above aging shaping method, and the details are not repeated here.
According to the aging shaping tool, clamping plates 6 are fixedly installed at equal division points of an aluminum alloy ring piece 1 during aging treatment, a centering piece is placed at the center of the aluminum alloy ring piece 1, and each clamping plate 6 is connected with the corresponding equal division points on the centering piece through a pull rod 4 with adjustable length. The length of each pull rod 4 is adjusted to enable the outer diameter difference of the aluminum alloy ring 1 at each equant point to be within a preset allowable error range, and at the moment, the ring is in a stressed state. And further, in the aging process, the aluminum alloy ring piece 1 is subjected to stress relaxation, so that synchronous shaping is realized. The tool is simple in structure, changes into machining, and obviously reduces the cost of deformation shaping after solution quenching of the large aluminum alloy ring 1 of 10m grade and the like.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. The aging shaping method of the large aluminum alloy ring piece is characterized by comprising the following steps:
measuring the outer circumference of the aluminum alloy ring piece, determining the outer diameter of a standard circle corresponding to the outer circumference, calculating to obtain the standard arc length of each section corresponding to N equal divisions of the standard circle according to the outer diameter of the standard circle, dividing the whole ring of the aluminum alloy ring piece into N equal divisions according to the standard arc length, and marking equal division points, wherein N is a positive integer greater than or equal to 3;
fixedly mounting a clamping plate at each equant point of the aluminum alloy ring piece, placing a centering piece at the center of the aluminum alloy ring piece, dividing the centering piece into N equal parts correspondingly, and respectively connecting each clamping plate with the corresponding equant point on the centering piece through a pull rod with adjustable length;
adjusting the length of each pull rod to enable the outer diameter difference of the aluminum alloy ring piece at each equant point to be within a preset allowable error range;
charging and carrying out aging treatment;
slowly cooling in the furnace after the aging heat preservation is carried out for the preset time, and discharging the aluminum alloy ring piece when the temperature of the aluminum alloy ring piece is reduced to a first preset temperature;
when the temperature of the aluminum alloy ring piece is reduced to a second preset temperature, the clamping plate is dismounted, wherein the second preset temperature is lower than the first preset temperature;
the cardboard is the U-shaped, then every of the aluminium alloy ring piece equant point fixed mounting cardboard specifically includes:
arranging a clamping plate at each equant point of the aluminum alloy ring piece and clamping the aluminum alloy ring piece in the U-shaped groove;
the cardboard respectively through length-adjustable's pull rod with the halving point that corresponds on the centering piece is connected, specifically includes:
two pull rods with adjustable lengths are respectively arranged corresponding to the clamping plates, one ends of the two pull rods are respectively connected with two vertical sides of the U shape of the clamping plates, the other ends of the two pull rods are respectively connected with the upper end and the lower end of the corresponding equal division point on the centering piece, and the clamping plates form restraint on the outer diameter of the ring piece under the action of the pulling force of the pull rods;
the centering piece includes centering drum and fixed connection in equal and criss-cross heart board that is of length in the centering drum, criss-cross intersect is the centre of a circle of centering drum, then the centering piece is placed at the center of aluminum alloy ring spare, specifically includes:
and placing the centering cylinder in the aluminum alloy ring piece, and adjusting the position of the aluminum alloy ring piece to enable the circle center of the centering cylinder to be located at the center of the aluminum alloy ring piece.
2. The aging shaping method according to claim 1, wherein the adjusting of the length of each pull rod to make the difference of the outer diameters of the aluminum alloy rings at each bisector point within a preset allowable error range specifically comprises:
adjusting the length of each pull rod to enable the aluminum alloy ring piece to be in a free state, and measuring the outer diameter of the aluminum alloy ring piece corresponding to the position of each clamping plate;
and adjusting the length of each pull rod according to the outer diameter of the aluminum alloy ring corresponding to the position of the clamping plate, so that the outer diameter difference of the aluminum alloy ring at each equant point is within a preset allowable error range.
3. The aging shaping method according to claim 1, wherein the aging is carried out for slow cooling in the furnace after the aging is carried out for a preset time, and the aluminum alloy ring is discharged when the temperature of the aluminum alloy ring is reduced to a first preset temperature, and the method specifically comprises the following steps:
after the aging heat preservation is carried out for the preset time, the heat treatment furnace is powered off, a door seam with the preset width of the heat treatment furnace door is opened, and a fan is started;
when the temperature in the furnace is reduced to a third preset temperature, closing the furnace door and keeping the fan open;
and discharging the aluminum alloy ring piece when the temperature of the aluminum alloy ring piece is reduced to a first preset temperature, wherein the third preset temperature is higher than the first preset temperature.
4. The age shaping method according to claim 3, wherein the first predetermined temperature is in a range of 60 ℃ to 65 ℃, the third predetermined temperature is in a range of 110 ℃ to 120 ℃, and the second predetermined temperature is room temperature.
5. The age shaping method as set forth in claim 1, further comprising, after said removing the clip:
and measuring the out-of-roundness of the aluminum alloy ring piece.
6. The age shaping method as claimed in any one of claims 1 to 5, wherein the pull rods comprise a fixed rod, a movable rod and a sleeve, one end of the fixed rod is clamped at one end of the sleeve and is rotatably connected with the sleeve, the other end of the fixed rod is fixedly connected with the centering member, the other end of the sleeve is in threaded connection with one end of the movable rod, and the other end of the movable rod is fixedly connected with the clamping plate, so that the adjusting of the length of each pull rod specifically comprises:
the sleeve of each pull rod is rotated to adjust the distance between the movable rod and the fixed rod so as to adjust the length of each pull rod.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811448939.9A CN109266982B (en) | 2018-11-28 | 2018-11-28 | Aging shaping method for large aluminum alloy ring piece |
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| JP4360721B2 (en) * | 1999-11-22 | 2009-11-11 | 第一高周波工業株式会社 | Ring material straightening method |
| CN201552212U (en) * | 2009-12-23 | 2010-08-18 | 中国有色（沈阳）冶金机械有限公司 | Cylinder roundness correcting and keeping device |
| CN203155771U (en) * | 2012-09-26 | 2013-08-28 | 安徽海螺川崎装备制造有限公司 | Checking circle tooling for cylinder body |
| JP6701675B2 (en) * | 2015-11-10 | 2020-05-27 | 日本精工株式会社 | Ring-shaped member roundness correction method, ring-shaped member manufacturing method, and mechanical device manufacturing method |
| CN105312367B (en) * | 2015-11-30 | 2017-07-28 | 上海电机学院 | The straightening method of high strength steel circular thin-wall forging |
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