CN113757986B - Handle forming method, air conditioner outdoor unit and air conditioner - Google Patents
Handle forming method, air conditioner outdoor unit and air conditioner Download PDFInfo
- Publication number
- CN113757986B CN113757986B CN202110961509.2A CN202110961509A CN113757986B CN 113757986 B CN113757986 B CN 113757986B CN 202110961509 A CN202110961509 A CN 202110961509A CN 113757986 B CN113757986 B CN 113757986B
- Authority
- CN
- China
- Prior art keywords
- target
- plate
- thickness
- die
- handle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/20—Casings or covers
-
- 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
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
-
- 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
- B21D53/00—Making other particular articles
- B21D53/60—Making other particular articles cutlery wares; garden tools or the like
- B21D53/70—Making other particular articles cutlery wares; garden tools or the like handle portions
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
Abstract
The application provides a handle forming method, an air conditioner outdoor unit and an air conditioner. The application includes: obtaining the target plate thickness of the plate; acquiring a target stamping size corresponding to the thickness of the target plate according to a preset thickness size corresponding relation, wherein the thickness size corresponding relation is established according to the surface flatness obtained in the simulation tensile test; selecting a target stretching die according to the target stamping size; and stretching the plate through the target stretching die to form the handle. Therefore, the handle forming method provided by the application forms the handle through stretching, the process is simple, the influence of the thickness of the target plate on the surface flatness is considered during stretching, the poor characteristics such as folds, cracks and burrs and the like cannot occur on the surface of the handle obtained through stretching forming, the quality is good, and the quality of the handle can be ensured while the handle is simple to manufacture through the handle forming method provided by the application.
Description
Technical Field
The application relates to the field of forming processes, in particular to a handle forming method, an air conditioner outdoor unit and an air conditioner.
Background
In furniture such as an outdoor unit of an air conditioner or a gas cooker, a handle is generally provided for convenience of transportation, and the handle is generally made of plastic or metal at present. And among them, metal handles are preferred by consumers due to their beautiful appearance and higher quality than plastic handles.
The traditional metal handle is usually obtained by forming a metal sheet, and in the forming process, because the metal sheet is thin, the conditions of fracture, corrugation and the like are very easy to occur, so that the quality of the handle is influenced, and the attractiveness of the handle is also influenced. When the quality of the handle is improved by adopting a complex process, a precision instrument matched with the process is needed, and the cost is greatly improved, so that a handle forming method with low cost and good quality of the manufactured handle is urgently needed.
Disclosure of Invention
The application provides a handle forming method, an air conditioner outdoor unit and an air conditioner, and aims to solve the problems that the existing handle forming method cannot simultaneously guarantee low cost and good handle quality.
In a first aspect, the present application provides a method of forming a handle, the method comprising:
obtaining the target plate thickness of the plate;
acquiring a target stamping size corresponding to the thickness of the target plate according to a preset thickness size corresponding relation, wherein the thickness size corresponding relation is established according to the surface flatness obtained in the simulation tensile test;
selecting a target stretching die according to the target stamping size;
and stretching the plate through the target stretching die to form the handle.
In a possible implementation manner of the present application, before obtaining a target stamping size corresponding to the thickness of the target plate according to a preset thickness size corresponding relationship, the method further includes:
generating a simulation plate, and acquiring the thickness of the simulation plate;
carrying out simulation tensile test on the simulation plate to obtain a plurality of simulation samples with different stamping bottom surface widths in the stamping size;
obtaining a target simulation sample with the largest surface evenness and a target stamping bottom width corresponding to the target simulation sample;
and establishing a corresponding relation between the thickness of the simulated plate corresponding to the target simulation sample and the width of the target stamping bottom surface to obtain a thickness size corresponding relation between the thickness of the plate and the stamping size.
In a possible implementation manner of the present application, the obtaining of the target simulation sample with the largest surface flatness includes:
obtaining an arc surface between the stamping fixed surface of each simulation plate and the side wall formed by a tensile test, and the surface flatness of the arc surface;
and obtaining the target simulation sample with the maximum surface flatness in each simulation sample.
In one possible implementation manner of the present application, the target stretching mold includes a target male mold and a preset female mold; when the target plate thickness h of the plate is less than 0.5mm, the concave-convex die gap between the target convex die and the preset concave die is 1.08h; when the target plate thickness h of the plate is more than or equal to 0.5mm and less than 1.2mm, the concave-convex die gap between the target convex die and the preset concave die is 1.1h; and when the target plate thickness h of the plate is more than or equal to 1.2mm, the concave-convex die gap between the target convex die and the preset concave die is 1.12h.
In one possible implementation manner of the present application, the selecting a target stretching die according to the target stamping size includes:
determining a target male die in a target stretching die according to the target stamping size;
obtaining a die drawing angle corresponding to the thickness of the plate according to a preset thickness angle corresponding relation;
and selecting a target female die in the target stretching die according to the die drawing angle.
In a possible implementation manner of the present application, before obtaining the draft angle corresponding to the thickness of the plate according to the preset thickness angle corresponding relationship, the method further includes:
generating a simulation plate, and acquiring the thickness of the simulation plate;
carrying out a tensile test on the simulated plate to obtain a plurality of simulated pattern drawing samples with different pattern drawing angles and the pattern drawing force of each simulated pattern drawing sample during pattern drawing;
obtaining the target pattern drawing sample with the minimum pattern drawing force;
and establishing a corresponding relation between the thickness of the simulated plate corresponding to the target drawing sample and the drawing force corresponding to the target drawing sample to obtain a preset thickness angle corresponding relation.
In one possible implementation manner of the present application, the stretching the plate material by the target stretching mold to form the handle includes:
adjusting a target male die in the target stretching die to enable a pressing rib on the target male die to be located above a stamping area of the plate;
controlling the target male die to stamp the stamping area to form a handle convex hull;
and reversely stretching the convex hull of the handle to form a handle grip so as to obtain the handle.
In a possible implementation manner of the present application, before the drawing the sheet material by the target drawing die to form the handle, the method further includes:
acquiring the prestretching depth corresponding to the thickness of the target plate;
pre-stretching the plate according to the pre-stretching depth;
and the pre-stretching depth is the stretching depth of which the maximum stress on the side wall formed by stretching is equal to a preset stress threshold value when a simulation stretching test is carried out according to the thickness of the target plate.
In a second aspect, the present application further provides an outdoor unit of an air conditioner, wherein a handle manufactured by a handle forming method is disposed on the outdoor unit of the air conditioner.
In a third aspect, the present application further provides an air conditioner, including an outdoor unit of the air conditioner, wherein a handle manufactured by a handle forming method is disposed on the outdoor unit of the air conditioner.
To sum up, the present application includes: obtaining the target plate thickness of the plate; acquiring a target stamping size corresponding to the thickness of the target plate according to a preset thickness size corresponding relation, wherein the thickness size corresponding relation is established according to the surface flatness obtained in the simulation tensile test; selecting a target stretching die according to the target stamping size; and stretching the plate through the target stretching die to form the handle. Therefore, the handle forming method provided by the application forms the handle through stretching, the process is simple, the influence of the thickness of the target plate on the surface flatness is considered during stretching, the poor characteristics such as folds, cracks and burrs and the like cannot occur on the surface of the handle obtained through stretching forming, the quality is good, and the quality of the handle can be ensured while the handle is simple to manufacture through the handle forming method provided by the application.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic application scenario diagram of a handle forming method provided in an embodiment of the present application;
FIG. 2 is a schematic flow chart of a method for forming a handle provided in an embodiment of the present application;
FIG. 3 is a schematic flow chart of obtaining a target simulation sample provided in the embodiments of the present application;
FIG. 4 is a schematic view of a target drawing die provided in an embodiment of the present application;
FIG. 5 is a schematic illustration of the draft angles provided in the examples of the present application;
FIG. 6 is another schematic illustration of draft angles provided in embodiments of the present application;
FIG. 7 is a schematic view of a process for obtaining a handle by pressing a bead according to an embodiment of the present disclosure;
fig. 8 is a schematic flow chart of the pre-stretching performed in the embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application.
In the description of the embodiments of the present application, it should be understood that the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically defined otherwise.
The following description is presented to enable any person skilled in the art to make and use the application. In the following description, details are set forth for the purpose of explanation. It will be apparent to one of ordinary skill in the art that the present application may be practiced without these specific details. In other instances, well-known processes have not been described in detail so as not to obscure the description of the embodiments of the present application with unnecessary detail. Thus, the present application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed in the embodiments herein.
The embodiment of the application provides a handle forming method, an air conditioner outdoor unit and an air conditioner. The handle manufactured by the handle forming method can be arranged on an air conditioner outdoor unit of an air conditioner, and the air conditioner can adopt a working mode of independent operation or an equipment cluster working mode, for example, the air conditioner can be a multi-split air conditioner.
First, the related background content of the embodiments of the present application is described:
stretch forming is a stamping method that uses a die to form a flat blank into an open hollow part. Stretch forming is widely used as one of the main pressing steps. Thin-walled parts of cylindrical, rectangular, stepped, spherical, conical, parabolic and other irregular shapes can be made by drawing processes, and parts of more complex shapes can also be made if combined with other stamping processes.
In the stretch forming process, a stretching mold is required, and generally comprises a female mold, a female mold fixing piece and a male mold.
The female die is a die for forming the external size and shape of the drawn piece, and the finally formed target drawn piece is similar to the shape of the female die. The shape of the female die can be customized according to the shape of the stretching target part, for example, a worker can customize a rectangular parallelepiped die according to the length, width and height of the stretching target part to obtain the stretching target part with corresponding length, width and height.
The die fixing piece is a fixing device for fixing the die so that the die does not displace in the stamping process. The die holder may be a hollow cylinder having a wall thickness, and the die may be placed in the hollow area.
A punch is a die used for stamping to deform a flat blank and may be a solid cylinder. When the stretching forming is carried out, the flat plate blank fixed on the female die is punched through the male die, and the stretching target part can be obtained. Thus, in addition to customizing the female die, the dimensions of the male die can be varied to achieve different tensile targets.
The execution body of the handle forming method in the embodiment of the present application may be a handle forming device when forming a handle, and the handle forming device is exemplified as the execution body in the following description, and it should be noted that the example of the handle forming device as the execution body is only for convenience of understanding and is not meant to limit the present application.
Referring to fig. 2, fig. 2 is a schematic view of a scene of a handle forming system provided in an embodiment of the present application. The handle forming system may include a handle forming apparatus 100, among other things. In addition, as shown in fig. 2, the handle molding system may further include a memory 200 for storing data.
It should be noted that the scene schematic diagram of the handle forming system shown in fig. 2 is only an example, and the handle forming system and the scene described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not form a limitation on the technical solution provided in the embodiment of the present application, and as a person having ordinary skill in the art knows that along with the evolution of the handle forming system and the appearance of a new service scene, the technical solution provided in the embodiment of the present invention is also applicable to similar technical problems.
Referring to fig. 2, fig. 2 is a schematic flow chart of a handle forming method according to an embodiment of the present disclosure. It should be noted that, although a logical order is shown in the flowcharts, in some cases, the steps shown or described may be performed in an order different from that shown or described herein. The handle forming method comprises the steps of 201-204, wherein:
201. and acquiring the target plate thickness of the plate.
The sheet material refers to a flat sheet blank for stretch forming. The shape of the plate is not limited in the embodiment of the application, and the plate can be any one of the shapes of an oval, a rectangle, a triangle and the like. In order to make the formed handle beautiful and light, it is necessary to select a material having an extremely thin and uniform thickness. Therefore, cold-rolled steel sheets can be used as the sheet material in the embodiments of the present application. Cold-rolled steel sheets are produced by rolling a coil of hot-rolled steel sheet at a temperature not higher than the recrystallization temperature at room temperature, and are further reduced in thickness in the cold-rolling process compared with hot-rolled steel sheets and the like, and are less expanded and uniform in thickness in the production process, and therefore, they are ideal hand-grip-forming blanks.
The target sheet thickness refers to the thickness of the sheet. There are various ways to obtain the target plate thickness, and for example, when the plate is fed in batch, the corresponding target plate thickness may be obtained according to the type of the plate and the feeding manufacturer. Alternatively, the target sheet thickness may be obtained by measurement. For example, when cold rolling is used as the sheet material, the target sheet thickness can be obtained by a cold rolling thickness gauge.
202. And acquiring a target stamping size corresponding to the thickness of the target plate according to a preset thickness size corresponding relation, wherein the thickness size corresponding relation is established according to the surface flatness obtained in the simulation tensile test.
The press size is the size of the sheet material after pressing the sheet material, and may also be understood as the size of the punch. For example, in the present embodiment, the punching size may be a convex hull width of a convex hull formed by punching, and if the male die is a cylinder, the larger the diameter of the cross section of the male die, the larger the convex hull width in the punching size.
The thickness dimension correspondence is a correspondence between the thickness of the sheet material and the punching dimension, and each sheet material thickness corresponds to one punching dimension. The reason why the thickness dimension correspondence is required is that the thickness of the sheet material becomes relatively thin and brittle with the drawing process during the drawing process. Therefore, in the process of stretching and forming, the clearance between the female die and the male die is small, so that the stretching resistance is increased, and the sheet material is cracked at the corner; the clearance between the female die and the male die is larger, and the wall opening or the convex hull of the plate is easy to wrinkle. Therefore, when the sheet material is subjected to stretch forming, the concave-convex die gap between the female die and the male die can be changed by adopting the corresponding stamping size, so that the surface of a product obtained after stretching is flat, and cracks or folds are avoided. The thickness size corresponding relationship may be a mapping relationship stored in the stretching mold, or may be a correspondence table obtained by a worker through handwriting, which is not limited in the embodiment of the present application.
Furthermore, if the female die is determined, the corresponding male die size, i.e. the punching size, can also be determined from the male-female die gap. Therefore, the thickness dimension correspondence relationship may also include a correspondence relationship between the sheet thickness and the clearance of the male and female dies.
The target press size is a press size corresponding to the target plate thickness in the thickness size correspondence relationship. For example, the target stamping dimension may refer to a convex hull width or convex hull depth corresponding to the target sheet material thickness in the thickness dimension correspondence.
The actual scene corresponding to the step 201 to the step 202 is to stretch the adopted plate blanks according to the thicknesses of the plate blanks to obtain handles with corresponding sizes after determining the plate blanks to be stretched. Besides the scene, the target stamping size can be determined according to the set handle size, then the corresponding target plate thickness is found in the thickness size corresponding relation according to the target stamping size, and then the proper plate is selected for stretch forming.
In the embodiment of the present application, the thickness size correspondence may be obtained according to a result of a simulation tensile test. The simulation stretching test is to perform simulation stretching on a virtual simulation plate through simulation software and obtain data during simulation stretching so as to determine ideal parameters during actual stretching. The simulated tensile test may be performed on simulation software, for example, a worker may perform the simulated tensile test on software such as Abaqus, auto, etc.
Specifically, the concave-convex die gap between the concave die and the convex die can be obtained through the thickness size corresponding relation table in table 1, and the concave die can be a preset concave die:
| thickness of the sheet | Concave-convex die gap |
| T<0.5mm | 1.1T |
| 0.5mm≤T<1.2mm | 1.12T |
| 1.2mm≤T≤3.0mm | 1.15T |
TABLE 1
Wherein T is the sheet thickness. It can be seen that as the thickness of the plate increases, the clearance between the male die and the female die also increases.
In some embodiments, the thickness dimension correspondence table may further include a concave-convex die gap corresponding to different stretching times in the stretching process, so that the sheet may be stretched multiple times in the stretch forming process, and the stress of each stretching may be reduced by stretching multiple times under the condition that the handle cannot be obtained by stretching once. Referring to table 2, through the table of the thickness dimension correspondence in table 2, the concave-convex mold gap corresponding to different stretching times can be obtained:
TABLE 2
Here, the first stretching may be understood as a pre-stretching, the second to last stretching may be understood as a reverse stretching, and the last stretching may be understood as a stretching for correction.
According to the gap between the concave die and the convex die and the size of the preset concave die, the size of the adopted convex die during stretching forming, namely the stamping size, can be obtained.
In some embodiments, the thickness dimension correspondence may be determined by simulating the surface flatness at the time of the tensile test. At this time, before the obtaining of the target stamping size corresponding to the thickness of the target plate according to the preset thickness size corresponding relationship, the method further includes:
(1) And generating a simulation plate, and acquiring the thickness of the simulation plate.
The simulated sheet may refer to a sheet in simulation software. By acquiring the data of the simulated plate in the stretching test process, the data corresponding to the plate in the actual stretching forming process can be presumed. For example, by obtaining the average stress of the surface of the simulated sheet when the sheet is stretched to a certain depth, the average stress of the surface of the sheet when the sheet is stretched to the certain depth in the actual stretch-forming process can be obtained. The thickness of the simulated plate can be one or more. For example, the plate products with n thicknesses in the market are provided, and the thickness of the simulation plate can be n.
The worker can establish the model of the simulation plate by reading the stored simulation plate model or manually modeling and the like, and obtain the thickness of the simulation plate at the same time. It should be noted that, when the model of the simulated plate is established, the material type of the simulated plate can also be determined. For example, when the sheet material is cold-rolled, the material of the dummy sheet material needs to be cold-rolled when the dummy sheet material is created, so as to avoid the occurrence of a result error between the dummy and actual stretching due to the difference in the material.
(2) And carrying out simulation tensile test on the simulation plate to obtain a plurality of simulation samples with different stamping bottom surface widths in the stamping size.
The stamped bottom width is referred to as the convex hull width as described in step 202. Specifically, simulation samples with different stamping bottom surface widths can be obtained by changing the size of the male die in the simulation tensile test. Assuming that the punch is a cylinder, the larger the diameter of the cross section of the cylinder, the larger the width of the punch bottom, and the smaller the diameter of the cross section of the cylinder, the smaller the width of the punch bottom, and thus the punch bottom width can be indicative of the size of the punch. It should be noted that, if there is only one simulated plate thickness of the simulated plate, a plurality of simulated samples corresponding to the simulated plate thickness are obtained. If the simulated plate thickness of the simulated plate is various, the simulated sample corresponding to the simulated plate with each simulated plate thickness is obtained.
(3) And acquiring a target simulation sample with the maximum surface flatness and the width of the target stamping bottom corresponding to the target simulation sample.
Surface flatness is a parameter used to evaluate the surface for undesirable features such as wrinkles, burrs, cracks, and the like. Illustratively, the surface flatness may be determined according to the thickness variance of the simulation sample, and if the thickness variance is large, it indicates that a feature of increasing the thickness such as a wrinkle or a burr may occur on the surface of the simulation sample, or a feature of decreasing the thickness such as a crack occurs, and thus the surface flatness is lower.
The target simulation sample is a simulation sample with the maximum surface flatness after stretching for a simulation plate with the thickness of the simulation plate. For example, the target simulation sample is the simulation sample with the smallest thickness variance after stretching for the simulation plate with the same simulation plate thickness. For example, first, a simulation sample obtained by drawing a simulation plate having a thickness of 1mm by using punches having different sizes can be obtained. And then calculating the thickness variance of each simulation sample, and taking the simulation sample with the minimum thickness variance as a target simulation sample. After the simulation plates with different thicknesses are subjected to the operation, the male die with the largest surface evenness when the simulation plates with the different thicknesses are stretched can be obtained, and the target stamping bottom width corresponding to the target simulation sample can be obtained.
(4) And establishing a corresponding relation between the thickness of the simulated plate corresponding to the target simulation sample and the width of the target stamping bottom surface to obtain a thickness size corresponding relation between the thickness of the plate and the stamping size.
203. And selecting a target stretching die according to the target stamping size.
In the embodiment of the present application, the target drawing die may include a preset female die and a male die selected according to the target press size. When the target stamping size is the target stamping bottom width, the size of the male die can be determined according to the target stamping bottom width, and if the male die is a cylinder, the male die with the cross section diameter being the same as the target stamping bottom width can be selected from the multiple male dies to obtain the target stretching die.
In some embodiments, the sheet material may be stretched many times, and there may be multiple target stretching molds, for example, the concave-convex mold gap for each stretching may be obtained according to table 2, and then the size of the convex mold corresponding to each stretching is obtained according to the concave-convex mold gap and the size of the preset concave mold, so as to determine the convex mold selected for each stretching.
204. And stretching the plate through the target stretching die to form the handle.
When the sheet material is stretched, the specific stretching step may include pre-stretching, counter-stretching, or the like. The pre-stretching is to perform stretching in a certain depth in advance before formal stretching forming, so as to avoid damage of the plate due to overlarge stress when the plate is directly stretched to the set depth. Reverse stretching is the reverse stretching on the convex hull generated when the sheet is stretched to form the handle grip.
In addition to stretching, workers can also perform punching, shaping and other treatments on the stretched product to obtain a handle capable of being taken out of a warehouse.
The handle that forms after handling can be used to the off-premises station of air conditioner, can also use on other equipment that need the handle, and this application embodiment does not restrict this.
Because the R angle is the part which is most concentrated in stress and most prone to thinning and pulling crack of the material in the stretching forming process, the R angle of the handle can be considered when the male die is selected in the stretching forming process, and the R angle of the handle can be increased as much as possible to avoid thinning and pulling crack of the material at the corner.
To sum up, the embodiment of the present application includes: obtaining the target plate thickness of the plate; acquiring a target stamping size corresponding to the thickness of the target plate according to a preset thickness size corresponding relation, wherein the thickness size corresponding relation is established according to the surface flatness obtained in the simulation tensile test; selecting a target stretching die according to the target stamping size; and stretching the plate through the target stretching die to form the handle. Therefore, the handle forming method provided by the embodiment of the application forms the handle by stretching, the process is simple, and the influence of the thickness of the target plate on the surface flatness is considered during stretching, so that the surface of the handle obtained by stretching and forming cannot have poor characteristics such as wrinkles, cracks and burrs, the quality is good, and the handle forming method provided by the embodiment of the application is simple in handle manufacturing and can ensure the quality of the handle.
In some embodiments, only areas that are prone to poor features may be considered when performing the simulation pull test, and thus the amount of computation in the simulation is less. Referring to fig. 3, the acquiring of the target simulation sample with the maximum surface flatness at this time includes:
301. and obtaining an arc surface between the stamping fixed surface of each simulation plate and the side wall formed by the tensile test, and the surface flatness of the arc surface.
The stamping fixed surface refers to a surface on which the simulation plate is fixed on the female die and does not deform in the stretching process. The punching press stationary plane can be in order to realize fixedly with the retainer plate cooperation that sets up on the die.
The side wall refers to a surface deformed during stretching, and can be understood as a surface of a convex hull formed by stretching, and can be understood as an R angle.
In the process of the simulation tensile test, when the male die punches the simulation plate, an arc surface is formed between the side wall and the punching fixing surface under the action of stress, and the stress is most concentrated on the arc surface, so that the possibility of generating bad characteristics such as folds, cracks or burrs on the arc surface is the largest, and if the surface flatness on the arc surface meets the requirement, the surface flatness on other surfaces can be inferred to meet the requirement.
It should be noted that the method for representing the flatness of the entire surface by the surface flatness of the arc surface between the side wall and the stamping fixing surface is only a method for reducing the calculation amount, and in the process of the simulation tensile test, the flatness of the entire surface can be represented by the surface flatness of other surfaces, for example, the flatness of the entire surface can be represented by the surface flatness of the side wall surface.
302. And acquiring the target simulation sample with the maximum surface flatness in each simulation sample.
Through the method provided by the steps 201 to 202, the calculation amount in simulation can be reduced, and the efficiency of the handle forming method can be improved.
In some embodiments, the female die can be determined according to the drawing angle after the male die is determined, so as to replace the preset female die. Referring to fig. 4, the selecting a target drawing die according to the target press size includes:
401. and determining a target male die in the target stretching die according to the target stamping size.
As can be seen from the description in step 202, the target punching size can also be understood as the size of the male die, so that the target male die refers to the male die corresponding to the target punching size, for example, the male die is a cylinder, and when the target punching size is the width of the convex hull, the target male die can be the male die whose cross-sectional diameter of the cylinder is equal to the width of the convex hull.
402. And acquiring a drawing angle corresponding to the thickness of the plate according to a preset corresponding relation of the thickness and the angle.
The draft angle is an angle designed to facilitate demolding. For example, the draft angle may be an angle between the side surface of the female die and a perpendicular line of a horizontal plane, and when the side surface of the female die is close to a perpendicular bisector of the female die, the draft angle is negative, and it is difficult to remove the die. When the side surface of the female die is far away from the perpendicular bisector of the female die, the die drawing angle is positive, and the die stripping is easy. In addition, since the side of the handle obtained by the stretch forming is always kept in contact with the side of the female die during the stretching process, the draft angle can be understood as an angle between the side of the handle and a perpendicular to a horizontal plane, referring to fig. 5, fig. 5 is a sectional view of the handle, a is one of the sides of the handle, b is a perpendicular to a horizontal plane, and θ is the draft angle.
The thickness angle corresponding relation refers to the corresponding relation between the thickness of the plate and the drawing angle, and each plate corresponds to one drawing angle.
Specifically, the thickness angle correspondence may be obtained through a simulation test. At this time, before obtaining the draft angle corresponding to the thickness of the plate according to the preset corresponding relationship of the thickness angle, the method further includes:
generating a simulation plate, and acquiring the thickness of the simulation plate.
For the description of step (i), reference may be made to step (1), which is not described in detail.
And (II) carrying out a tensile test on the simulated plate to obtain a plurality of simulated pattern drawing samples with different pattern drawing angles and the pattern drawing force of each simulated pattern drawing sample during pattern drawing.
The simulation drawing sample refers to a sample with different drawing angles obtained after a simulation plate is subjected to a tensile test.
When the simulation plate is subjected to a tensile test, in order to ensure that variables are uniform, a target male die can be used as a male die in a tensile process to stretch the simulation plate. Specifically, during the simulation tensile test, a plurality of simulation drawing samples with different drawing angles can be obtained by matching the female dies with different drawing angles with the target male die.
After obtaining each simulation pattern drawing sample, the pattern drawing can be carried out, and the pattern drawing force corresponding to each simulation pattern drawing sample is detected while the pattern drawing is carried out.
And (III) obtaining the target pattern drawing sample with the minimum pattern drawing force.
The target pattern drawing sample refers to the sample with the smallest pattern drawing force in the simulation pattern drawing samples.
And (IV) establishing a corresponding relation between the thickness of the simulated plate corresponding to the target pattern drawing sample and the pattern drawing force corresponding to the target pattern drawing sample to obtain a preset thickness angle corresponding relation.
403. And selecting a target female die in the target stretching die according to the die drawing angle.
Referring to fig. 6, fig. 6 shows the handle after stretch forming, and A, B, C, D are 4 side surfaces of the handle, respectively. For the handle on the outdoor unit of the air conditioner, the handle width is required to be designed to be as small as possible, so the drawing of the B surface and the C surface is more difficult than the drawing of the C surface and the D surface, and the drawing angle of the B surface and the C surface is also more difficult, for example, 35 degrees, and the drawing angle of the A surface is also increased, but can be smaller than the drawing angle of the B surface and the C surface, for example, 25 degrees, and the D surface is required to be 45 degrees because the wire through hole is usually arranged on the D surface.
In some embodiments, wrinkles on the surface of the handle obtained after molding can be avoided through the material pressing ribs. Referring to fig. 7, the drawing the sheet material through the target drawing die to form the handle at this time includes:
501. and adjusting a target male die in the target stretching die to enable a pressing rib on the target male die to be located above the stamping area of the plate.
The pressing rib is a rib-shaped protrusion used for controlling the flow of the plate in the stretching forming process, and the pressing rib can be a part integrally formed with the female die or an independent part arranged on the female die.
In the process of stretch forming, the pressing ribs can press the punching fixing surface of the plate, so that the plate is not prone to tilting, the deformation speed of the plate after the plate is contacted with the male die can be controlled, and the surface of the handle is not wrinkled.
502. And controlling the target male die to punch the punching area to form a handle convex hull.
The handle convex hull is a convex hull generated by the deformation of the plate through the matching of the target convex die and the target concave die, and referring to fig. 5, the area in the dotted frame in fig. 5 is the handle convex hull.
503. And reversely stretching the handle convex hull to form a handle grip so as to obtain the handle.
The reverse stretching is that the target male die is arranged above the handle convex hull, pressure is applied to the handle convex hull to deform the contact area of the target male die and the handle convex hull, and the deformation direction of the plate is opposite to that of the plate during the reverse stretching and the stretching. During the reverse stretching, the size of the R angle between the deformed area and the undeformed area of the convex hull of the handle also needs to be considered, and the R angle is increased as much as possible so as to avoid the situation that the material at the corner becomes thinner and is pulled apart.
In some embodiments, the sheet may also be pre-stretched. Referring to fig. 8, before the drawing the sheet material through the target drawing die to form the handle, the method further includes:
601. and acquiring the prestretching depth corresponding to the thickness of the target plate.
The prestretching depth refers to the deformation depth of the plate when the plate is prestretched. The pre-stretch depth may be determined based on the target sheet thickness of the sheet. When the target sheet thickness is large, the maximum depth at which the sheet is once stretched without generating cracks is larger because the depth at which the sheet thickness reaches the critical point of fracture is large when the target sheet thickness is large.
The pre-stretching depth can be obtained by a simulated stretching test. For example, a model of the simulated plate can be established according to the thickness of the target plate, then the simulated plate is pre-stretched by the target female die and the target male die at different stretching depths, and the maximum stress on the side wall formed by the deformation of the simulated plate in each pre-stretching process is obtained. Typically this maximum stress occurs at the R-angle after deformation. By comparing the obtained maximum stress with a preset stress threshold, the pretension depth can be determined. The predetermined stress threshold may be a critical stress at which the plate is broken, for example, when the stress is greater than 500 newtons, the plate is broken, and the predetermined stress threshold may be set to 500 newtons.
602. And pre-stretching the plate according to the pre-stretching depth.
The above detailed description is provided for a method, an apparatus, a storage medium and an air conditioner for forming a handle according to embodiments of the present application, and a specific example is applied to illustrate the principle and the implementation of the present application, and the description of the above embodiments is only used to help understanding the method and the core concept of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (8)
1. A method of forming a handle, the method comprising:
obtaining the target plate thickness of the plate;
acquiring a target stamping size corresponding to the thickness of the target plate according to a preset thickness size corresponding relation, wherein the thickness size corresponding relation is established according to the surface flatness obtained in the simulation tensile test;
selecting a target stretching die according to the target stamping size;
stretching the plate through the target stretching die to form a handle;
the selecting a target drawing die according to the target stamping size includes:
determining a target male die in a target stretching die according to the target stamping size;
obtaining a die drawing angle corresponding to the thickness of the plate according to a preset thickness angle corresponding relation;
selecting a target female die in the target stretching die according to the die drawing angle;
before obtaining the die drawing angle corresponding to the plate thickness according to the preset thickness angle corresponding relation, the method further includes:
generating a simulation plate, and acquiring the thickness of the simulation plate;
performing a tensile test on the simulated plate to obtain a plurality of simulated pattern drawing samples with different pattern drawing angles and a pattern drawing force of each simulated pattern drawing sample during pattern drawing;
obtaining the target pattern drawing sample with the minimum pattern drawing force;
and establishing a corresponding relation between the thickness of the simulated plate corresponding to the target pattern drawing sample and the pattern drawing force corresponding to the target pattern drawing sample to obtain a preset thickness angle corresponding relation.
2. The handle forming method according to claim 1, wherein before obtaining the target pressing size corresponding to the target plate thickness according to the preset thickness size correspondence, the method further comprises:
generating a simulation plate, and acquiring the thickness of the simulation plate;
carrying out simulation tensile test on the simulation plate to obtain a plurality of simulation samples with different stamping bottom surface widths in the stamping size;
obtaining a target simulation sample with the largest surface evenness and a target stamping bottom width corresponding to the target simulation sample;
and establishing a corresponding relation between the thickness of the simulated plate corresponding to the target simulation sample and the width of the target stamping bottom surface to obtain a thickness size corresponding relation between the thickness of the plate and the stamping size.
3. The method of claim 2, wherein the obtaining of the target simulation specimen with the maximum surface flatness comprises:
obtaining an arc surface between the stamping fixed surface of each simulation plate and the side wall formed by the tensile test, and the surface flatness of the arc surface;
and obtaining the target simulation sample with the maximum surface flatness in each simulation sample.
4. A handle forming method according to claim 2, wherein the target drawing die comprises a target male die and a preset female die; when the target plate thickness h of the plate is less than 0.5mm, the concave-convex die gap between the target convex die and the preset concave die is 1.08h; when the target plate thickness h of the plate is more than or equal to 0.5mm and less than 1.2mm, the concave-convex die gap between the target convex die and the preset concave die is 1.1h; and when the target plate thickness h of the plate is more than or equal to 1.2mm, the concave-convex die gap between the target convex die and the preset concave die is 1.12h.
5. The handle forming method as claimed in claim 1, wherein said drawing said plate material by said target drawing die to form a handle comprises:
adjusting a target male die in the target stretching die, so that a pressing rib on the target male die is positioned above a stamping area of the plate;
controlling the target male die to stamp the stamping area to form a handle convex hull;
and reversely stretching the convex hull of the handle to form a handle grip so as to obtain the handle.
6. The method of forming a handle according to claim 1, wherein before said drawing said sheet material through said target drawing die to form a handle, said method further comprises:
acquiring the prestretching depth corresponding to the thickness of the target plate;
pre-stretching the plate according to the pre-stretching depth;
and the pre-stretching depth is the stretching depth of which the maximum stress on the side wall formed by stretching is equal to a preset stress threshold value when the simulation stretching test is carried out according to the thickness of the target plate.
7. An outdoor unit of an air conditioner, wherein a handle manufactured by the method of forming a handle as claimed in any one of claims 1 to 6 is provided.
8. An air conditioner comprising an outdoor unit of an air conditioner, wherein the outdoor unit of the air conditioner is provided with a handle manufactured by the method for forming a handle according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110961509.2A CN113757986B (en) | 2021-08-20 | 2021-08-20 | Handle forming method, air conditioner outdoor unit and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110961509.2A CN113757986B (en) | 2021-08-20 | 2021-08-20 | Handle forming method, air conditioner outdoor unit and air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113757986A CN113757986A (en) | 2021-12-07 |
| CN113757986B true CN113757986B (en) | 2022-12-13 |
Family
ID=78790647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110961509.2A Active CN113757986B (en) | 2021-08-20 | 2021-08-20 | Handle forming method, air conditioner outdoor unit and air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113757986B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201249241Y (en) * | 2008-09-12 | 2009-06-03 | 合肥市华林模具有限公司 | Handle die |
| JP2010279986A (en) * | 2009-06-05 | 2010-12-16 | Polysis:Kk | Method of manufacturing press die and hard particle dispersing sheet used for it |
| CN102672059A (en) * | 2011-03-16 | 2012-09-19 | 重庆长安汽车股份有限公司 | Method for determining modification molding surface of female mold or male mold of mold according to thickness of simulation stamped workpiece |
| CN102825132A (en) * | 2012-09-04 | 2012-12-19 | 东莞市精力仁模具有限公司 | Punching technology of handle of cabinet freezer and punching die thereof |
| CN204176808U (en) * | 2014-04-29 | 2015-02-25 | 美的集团股份有限公司 | The front panel of air-conditioner outdoor unit and air-conditioner outdoor unit thereof |
| CN104928995A (en) * | 2014-03-20 | 2015-09-23 | 吴鸣华 | Automatic molding machine for producing pulp moulded products at super small draft angle |
| CN106295010A (en) * | 2016-08-12 | 2017-01-04 | 卓达新材料科技集团威海股份有限公司 | A kind of method rolling out line production sheet material |
| CN107025354A (en) * | 2017-04-15 | 2017-08-08 | 贵州大学 | A kind of window lifting plate forming technology optimization method based on range analysis |
| CN107092745A (en) * | 2017-04-15 | 2017-08-25 | 贵州大学 | A kind of window lifting plate forming technology optimization method based on variance analysis |
| CN110750888A (en) * | 2019-10-11 | 2020-02-04 | 马鞍山钢铁股份有限公司 | Stamping forming analysis method for vehicle frame cross beam part |
| CN111651929A (en) * | 2019-12-24 | 2020-09-11 | 广东海洋大学 | Multi-objective optimization method based on fusion of Dynaform and intelligent algorithm |
| CN212704034U (en) * | 2020-08-10 | 2021-03-16 | 苏州东博精密制造有限公司 | Pressing device of stamping and drawing die |
| CN112588921A (en) * | 2020-11-06 | 2021-04-02 | 安徽江淮汽车集团股份有限公司 | Automobile door outer plate stamping process and stamping die |
-
2021
- 2021-08-20 CN CN202110961509.2A patent/CN113757986B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201249241Y (en) * | 2008-09-12 | 2009-06-03 | 合肥市华林模具有限公司 | Handle die |
| JP2010279986A (en) * | 2009-06-05 | 2010-12-16 | Polysis:Kk | Method of manufacturing press die and hard particle dispersing sheet used for it |
| CN102672059A (en) * | 2011-03-16 | 2012-09-19 | 重庆长安汽车股份有限公司 | Method for determining modification molding surface of female mold or male mold of mold according to thickness of simulation stamped workpiece |
| CN102825132A (en) * | 2012-09-04 | 2012-12-19 | 东莞市精力仁模具有限公司 | Punching technology of handle of cabinet freezer and punching die thereof |
| CN104928995A (en) * | 2014-03-20 | 2015-09-23 | 吴鸣华 | Automatic molding machine for producing pulp moulded products at super small draft angle |
| CN204176808U (en) * | 2014-04-29 | 2015-02-25 | 美的集团股份有限公司 | The front panel of air-conditioner outdoor unit and air-conditioner outdoor unit thereof |
| CN106295010A (en) * | 2016-08-12 | 2017-01-04 | 卓达新材料科技集团威海股份有限公司 | A kind of method rolling out line production sheet material |
| CN107025354A (en) * | 2017-04-15 | 2017-08-08 | 贵州大学 | A kind of window lifting plate forming technology optimization method based on range analysis |
| CN107092745A (en) * | 2017-04-15 | 2017-08-25 | 贵州大学 | A kind of window lifting plate forming technology optimization method based on variance analysis |
| CN110750888A (en) * | 2019-10-11 | 2020-02-04 | 马鞍山钢铁股份有限公司 | Stamping forming analysis method for vehicle frame cross beam part |
| CN111651929A (en) * | 2019-12-24 | 2020-09-11 | 广东海洋大学 | Multi-objective optimization method based on fusion of Dynaform and intelligent algorithm |
| CN212704034U (en) * | 2020-08-10 | 2021-03-16 | 苏州东博精密制造有限公司 | Pressing device of stamping and drawing die |
| CN112588921A (en) * | 2020-11-06 | 2021-04-02 | 安徽江淮汽车集团股份有限公司 | Automobile door outer plate stamping process and stamping die |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113757986A (en) | 2021-12-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4908763B2 (en) | Forming method of painted steel sheet | |
| US7322222B2 (en) | Method of press molding and molding device | |
| TWI490055B (en) | Forming method and forming device of battery case | |
| US9630229B2 (en) | Device for molding and method for molding metal plate | |
| JP3375602B2 (en) | Method of manufacturing fin for heat exchanger and mold for manufacturing fin for heat exchanger | |
| CN109789468B (en) | Method and device for producing a component having a matched base region | |
| JP6776768B2 (en) | How to make a square can | |
| JP2790999B2 (en) | Fin unit for heat exchanger | |
| US3263637A (en) | Method of deep drawing rectangular shapes | |
| JP2002126825A (en) | Apparatus and method for deforming and processing blank composed of rolled and flexible metal strip member | |
| CN113757986B (en) | Handle forming method, air conditioner outdoor unit and air conditioner | |
| US8973420B2 (en) | Corrugated fin manufacturing apparatus | |
| JP2002239644A (en) | Corner drawing method and its die | |
| JP4120119B2 (en) | Burring forming method and mold apparatus | |
| CN111266465A (en) | Stress-relieving stamping die, stress-relieving stamping method and metal plate stamping part | |
| CN112364549A (en) | Method for establishing forming limit field of rolling variable-thickness plate | |
| CN211247975U (en) | Aluminum profile bending die | |
| JP5400537B2 (en) | Deep drawing iron square can multistage press molding method and deep drawing iron square can | |
| KR20100116340A (en) | Can for cylindrical-type battery and method of the same | |
| RU2282516C2 (en) | Method and die set for forming body parts | |
| CN210586640U (en) | Heat shield rotary-cut mould | |
| JP2007015016A (en) | Method for manufacturing metal plate having cambered hole | |
| CN210115375U (en) | Be applied to fashioned structure of attenuation turn-ups | |
| JP3440620B2 (en) | Method of manufacturing ventilator | |
| JP2004195504A (en) | Apparatus and method for forming steel pipe and manufacturing equipment train |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |