Powder loading method and system of hydraulic servo forming machine and intelligent terminal

Abstract

The invention relates to a powder filling method and system of a hydraulic servo forming machine and an intelligent terminal, and relates to the field of hydraulic servo forming machines. The powder filling method comprises the steps that the product model of a to-be-formed product and image information of a forming cavity are obtained; matching powder demand according to the product model and a preset product database; shape and size information of the forming cavity is determined according to the image information of the forming cavity; according to the powder demand quantity and the shape and size information of the forming cavity, a powder filling device is controlled to fill the forming cavity with the metal powder and conduct preliminary smoothing, and metal powder image information after the forming cavity is filled with the metal powder is obtained; establishing a powder top surface fall model according to the metal powder image information and preset powder characteristics; determining all powder valley point positions and powder peak point positions according to a powder top surface fall model; and according to the powder valley point position and the powder peak point position, an air blowing device is controlled to conduct pulse air blowing on the metal powder so as to smoothen the metal powder. The forming device has the effect of improving the forming quality of the metal parts.

Description

Technical Field

[0001] The present invention relates to the field of hydraulic servo forming machines, and in particular to a powder loading method, system and intelligent terminal of a hydraulic servo forming machine. Background Art

[0002] The hydraulic servo forming machine is a device that drives the hydraulic system through a servo motor to control the forming mold to work. It combines the powerful driving force of the hydraulic system and the precise control ability of the servo motor to achieve efficient and precise forming processing.

[0003] When powder pressing is performed by a hydraulic servo forming machine, metal powder needs to be first filled into the forming cavity of the forming mold, and then the forming cavity is punched by a punch head to obtain a metal part. The method of filling the forming cavity with metal powder by traditional equipment is usually to directly pour the metal powder into the forming cavity and then directly punch it. Since the surface of the metal powder in the forming cavity is uneven, defects may appear on the surface of the metal parts formed by stamping, thereby affecting the forming quality of the parts, which needs to be improved. Summary of the invention

[0004] In order to improve the molding quality of metal parts, the present invention provides a powder loading method, system and intelligent terminal for a hydraulic servo molding machine.

[0005] In a first aspect, the present invention provides a powder loading method for a hydraulic servo forming machine, which adopts the following technical solution: A powder loading method for a hydraulic servo forming machine, comprising: Obtain product model and molding chamber image information of the product to be molded; Determine the powder requirement based on the product model and the preset product database; Determine the shape and size information of the molding chamber according to the molding chamber image information; According to the powder demand and the shape and size information of the molding chamber, a preset powder loading device is controlled to fill the metal powder into the molding chamber and perform preliminary smoothing, and the metal powder image information after the molding chamber is filled with the metal powder is obtained; A powder top surface drop model is established according to metal powder image information and preset powder characteristics; Determine all powder valley point positions and powder peak point positions according to the powder top surface drop model; According to the positions of the valley points and peak points of the powder, a preset air blowing device is controlled to blow pulse air on the metal powder to smooth it.

[0006] By adopting the above technical solution, the system first controls the powder loading device to load the metal powder into the molding chamber, and then preliminarily smoothes the metal powder in the molding chamber, and then obtains the powder valley point position and the powder peak point position, and blows the powder peak point position to the powder valley point position through the blowing device to smooth the metal powder. The metal powder in the molding chamber is processed in the above manner, and the metal powder is relatively flat before pressing, which can improve the molding quality of metal parts.

[0007] Optionally, the metal powder filling method includes: Determine the horizontal contour of the molding chamber, the horizontal center point of the molding chamber, and the horizontal cross-sectional area of ​​the molding chamber according to the shape and size information of the molding chamber; The bottom surface of the molding chamber is divided into a plurality of powder loading areas with regular shapes according to the horizontal contour of the molding chamber, the horizontal center point of the molding chamber and the preset spraying width; Determine the area contour and the center of each powder loading area according to the molding chamber image information and the powder loading area; Determine the filling path of each powder loading area according to the area contour, the center of the powder loading area and the spraying width of each powder loading area. The filling path is stepped and the same as the area contour. The filling path gradually narrows toward the center of the powder loading area. The powder loading device is controlled to load powder to each powder loading area along the filling path. After the powder loading is completed, the preset vibration device is controlled to vibrate the metal powder to initially smooth the metal powder.

[0008] Optionally, the method of vibrating the metal powder by the vibration device includes: Determine the powder ridge position and the powder ridge height according to the metal powder image information and the powder characteristics; Determine the powder path according to the metal powder image information and the powder convex strip position; matching the vibration movement path of the vibration device according to the powder path; Match the vibration amplitude of the vibration device according to the height of the powder ridges; The vibration device is controlled by the vibration amplitude to vibrate the metal powder along the vibration moving path to initially smooth the metal powder.

[0009] Optionally, the vibration device is disposed outside the molding chamber and vibrates the metal powder outside the molding chamber, and the vibration method of the metal powder by the vibration device further includes: Determine the shortest distance between a position point on the powder path and the inner wall of the molding chamber and the shortest path corresponding to the shortest distance according to the metal powder image information and the powder path; Screen all the shortest paths, determine the shortest path group with inclusion relationship, and select the relatively longest path from the shortest path group as the updated shortest path; Determine the wall thickness information of the inner wall of the molding chamber corresponding to the shortest path and the outer wall position of the mold corresponding to the wall thickness information according to the metal powder image information, the shortest path corresponding to the closest distance value, and the preset mold wall thickness; Determine the impact distance based on the updated shortest path and wall thickness information; Matching the corrected vibration amplitude of the vibration device according to the impact distance; Match the vibration frequency of the vibration device according to the preset powder material; According to the correction amplitude and vibration frequency, the vibration device is controlled to vibrate the position point on the powder path in the molding chamber at the outer wall of the mold to smooth the metal powder.

[0010] Optional metal powder pulse blowing methods include: Determine the average height of the powder according to the positions of the powder valley points and the powder peak points; Determine the smoothing height based on the average height of the powder and the position of the powder peak; Match the blowing force of the blowing device according to the smoothing height; Determine the blowing distance according to the positions of the powder valley points and the powder peak points; Determine the blowing angle according to the blowing distance and smoothing height; The force adjustment amount is matched according to the blowing distance, and the blowing force is corrected according to the force adjustment amount to obtain the corrected blowing force; According to the correction of blowing force and blowing angle, the blowing device is controlled to perform pulse blowing on the metal powder at the powder peak point in the form of an air cannon to blow the metal powder into the powder valley point.

[0011] Optionally, also include: Determine all powder valley positions around the powder peak position according to the metal powder image information, the powder peak position and the preset circumferential filling range; Determine the total volume of the valley point location based on the average height of the powder and the location of the powder valley point; Determine the volume removed from the peak point according to the average height of the powder and the position of the powder peak point; Currently, only when the volume removed from the peak position is greater than the sum of the volumes at the valley positions, the difference between the volume removed from the peak position and the sum of the volumes at the valley positions is calculated and defined as the dispersion volume; Match the dispersion force of the blowing device according to the dispersion volume; The air blowing device is controlled to blow the metal powder at the powder peak position to the powder valley position in the circumferential filling range. After the air blowing is completed, the air blowing device is controlled to move vertically downward and vibrate the remaining metal powder at the powder peak position with a vibrating force.

[0012] Optionally, an air blowing mesh cover is provided at the opening of the molding chamber, the air blowing mesh cover is in a grid shape and has a grid opening for the air blowing device to pass through, and the grid opening has air outlet holes in the circumference; when the air blowing device blows air to the metal powder, the method of preventing the powder from floating out of the molding chamber includes: Determine the drifting distance according to the powder peak position and the preset molding chamber opening position; Match the benchmark blowing force according to the floating distance; When the blowing force of the blowing device at the powder peak position is greater than the reference blowing force, the grid opening group of the blowing mesh cover is matched according to the powder peak position and the circumferential filling range; The air outlet holes of the grille opening group are controlled to rotate to blow air into the molding chamber to suppress the floating metal powder, and the remaining grille opening groups are controlled to blow air horizontally at a preset horizontal angle to form an air curtain.

[0013] Optionally, the angle control method of the grille opening includes: Determine the blowing range contour according to the powder peak position and the circumferential filling range; Determine the pressing angle and pressing distance according to the blowing range contour and drifting distance; Match the pressing and blowing strength of the grille opening group according to the pressing distance; According to the pressing angle and the pressing blowing force, the air outlet holes of the grille opening group are controlled to be tilted to blow air to the contour of the blowing range to form a conical wind blocking hood above the contour of the blowing range.

[0014] In the second aspect, the present application provides a powder loading system for a hydraulic servo forming machine, which adopts the following technical solution: A powder loading system for a hydraulic servo forming machine, comprising: An acquisition module, used to acquire the product model of the product to be formed, the image information of the forming chamber and the image information of the metal powder; A memory for storing a program of a powder loading method for any of the above-mentioned hydraulic servo forming machines; The program in the processor and the memory can be loaded and executed by the processor to realize a powder loading method of a hydraulic servo forming machine.

[0015] In a third aspect, the present application provides a smart terminal, which adopts the following technical solution: An intelligent terminal comprises a memory and a processor, wherein the memory stores a powder loading method which can be loaded and executed by the processor for any of the above-mentioned hydraulic servo forming machines.

[0016] In summary, the present application includes at least one of the following beneficial technical effects: 1. The system first controls the powder loading device to load the metal powder into the molding chamber, and then preliminarily smoothes the metal powder in the molding chamber. Then, by obtaining the powder valley point position and the powder peak point position, the blowing device blows the powder peak point position to the powder valley point position to smooth the metal powder. The above method is used to process the metal powder in the molding chamber. The metal powder is relatively flat before pressing, which can improve the molding quality of metal parts. 2. The metal powder in the molding chamber is vibrated by a vibration device outside the molding chamber. The vibration wave generated by the vibration device can vibrate and smooth all points on the powder path on the same straight line in the molding chamber, which is highly efficient. 3. When the air blowing device blows and smoothes the metal powder, the grille opening group of the air blowing net bag arranged at the opening of the molding chamber can blow air into the molding chamber and produce a wind blocking hood. The air blowing net bag can block the metal powder floating in the molding chamber and prevent external dust from entering the molding chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a method flow chart of a powder loading method of a hydraulic servo forming machine according to an embodiment of the present invention; Figure 2 is a method flow chart of a metal powder filling method according to an embodiment of the present invention; Figure 3 The method flow of the vibration method of the vibration device of the embodiment of the present invention on the metal powder is as follows Figure 1 ; Figure 4 The method flow of the vibration method of the vibration device of the embodiment of the present invention on the metal powder is as follows Figure 2 ; Figure 5 The method flow of the metal powder pulse blowing method according to the embodiment of the present invention is Figure 1 ; Figure 6 The method flow of the metal powder pulse blowing method according to the embodiment of the present invention is Figure 2 . DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0019] The embodiment of the present application discloses a powder loading method for a hydraulic servo forming machine. Metal powder is charged into the forming chamber according to a set path according to the shape of the forming chamber, the metal powder is initially smoothed by a vibration device, and finally the surface of the metal powder is finally smoothed by a blowing device, so that the surface of the metal powder in the forming chamber is flat.

[0020] Reference Figure 1 A powder loading method for a hydraulic servo forming machine comprises the following steps: Step S100: obtaining the product model and molding chamber image information of the product to be molded.

[0021] The product model refers to the model information of the part to be processed. The product model is directly input into the equipment by the staff, and the equipment system then obtains the input product model.

[0022] The molding cavity image information refers to an image of the molding cavity obtained by photographing the molding cavity of the molding mold through a camera.

[0023] Step S101: Determine the powder requirement based on the product model and the preset product database.

[0024] The product database is a database that is pre-entered in the system by technicians and contains the material quantities required for the production and processing of all product models, and will not be elaborated here.

[0025] Powder demand refers to the amount of metal powder required to process the parts of the corresponding product model. The powder demand can be directly matched in the product database by entering the product model into the product database.

[0026] Step S102: determining the shape and size information of the molding chamber according to the molding chamber image information.

[0027] The molding chamber shape and size information refers to the shape and size parameter information of the internal space of the molding chamber. The molding chamber shape and size information can be obtained by performing image recognition analysis on the molding chamber through the molding chamber image information. The molding chamber shape and size information includes parameter information such as the bottom contour and area of ​​the molding chamber.

[0028] Step S103: According to the powder demand and the shape and size information of the molding chamber, a preset powder loading device is controlled to fill the metal powder into the molding chamber and perform preliminary smoothing, and metal powder image information after the molding chamber is filled with the metal powder is obtained.

[0029] After determining the powder demand required for producing metal parts and the shape and size information of the molding chamber, the powder loading device in the equipment can fill the metal powder into the molding chamber according to a preset powder loading method. The specific powder loading method is not described in detail and will be introduced in detail in subsequent embodiments.

[0030] After the process of filling the molding chamber with powder is completed, the metal powder in the molding chamber needs to be smoothed, so the surface of the metal powder in the molding chamber needs to be identified first. The metal powder image information is the image captured by the camera of the metal powder already filled in the molding chamber.

[0031] Step S104: establishing a powder top surface drop model according to the metal powder image information and preset powder features.

[0032] After the metal powder is filled into the molding chamber, its surface has a height difference due to its unevenness. The powder top surface difference model refers to the three-dimensional data formed by three-dimensional modeling of the height difference distance. The metal powder image information includes the distance parameters of the height difference of the metal powder surface. The metal powder top surface difference model can be obtained by three-dimensional modeling of the metal powder through the metal powder image information.

[0033] Step S105: determining all powder valley point positions and powder peak point positions according to the powder top surface drop model.

[0034] The powder valley point position refers to the position where the surface of the metal powder is depressed downward to form a valley, and the height of the powder valley point position is lower than the preset average height of the metal powder.

[0035] The powder peak position refers to the position where the metal powder surface bulges upward to form a peak, and the height of the powder peak position is higher than the preset average height of the metal powder.

[0036] By analyzing the parameters of the metal powder surface from the powder top surface drop model, the positions of all powder valley points and powder peak points can be obtained.

[0037] Step S106: controlling a preset air blowing device to blow pulse air to the metal powder to smooth it according to the positions of the powder valley points and the powder peak points.

[0038] After the powder valley point position and the powder peak point position are determined, the system controls the blowing device preset on the equipment to blow the metal powder at the powder peak point position, and blows the metal powder at the powder peak point position to the powder valley point position, thereby smoothing the surface of the metal powder. The specific method of blowing the metal powder by the blowing device is not described here, and will be described in detail in the subsequent embodiments.

[0039] Reference Figure 2 The metal powder filling method comprises the following steps: Step S200: determining the horizontal contour of the molding chamber, the horizontal center point of the molding chamber, and the horizontal cross-sectional area of ​​the molding chamber according to the shape and size information of the molding chamber.

[0040] The horizontal profile of the molding chamber refers to the cross-sectional profile of any horizontal cross section of the molding chamber. The horizontal center point of the molding chamber refers to the center position of the horizontal profile of the molding chamber. The horizontal cross-sectional area of ​​the finished cavity refers to the area enclosed by the horizontal profile of the molding chamber.

[0041] The molding chamber shape and size information includes the parameters of the molding chamber horizontal contour, the molding chamber horizontal center point and the molding chamber horizontal cross-sectional area. The system can directly analyze the molding chamber horizontal contour, the molding chamber horizontal center point and the molding chamber horizontal cross-sectional area from the molding chamber shape and size information.

[0042] Step S201: Divide the bottom surface of the molding chamber into a plurality of powder loading areas with regular shapes according to the horizontal contour of the molding chamber, the horizontal center point of the molding chamber and a preset spraying width.

[0043] In this embodiment, the molding chamber is loaded with powder along the contour of the molding chamber by a powder loading device. When the contour of the molding chamber is irregular, loading powder along the contour of the molding chamber may cause powder overlap, thereby making the height of the metal powder inconsistent. Therefore, it is necessary to first divide the horizontal contour of the molding chamber into multiple more regular shape contours. For contours with more regular shapes, the metal powder is not easy to overlap when loading powder along its contour, which facilitates powder loading.

[0044] The spraying width is the width of the path filled by the metal powder when the metal powder is filled into the molding chamber, which is determined by the parameters of the powder loading device and will not be elaborated here.

[0045] The powder loading area refers to the powder loading area formed after the horizontal contour of the molding chamber is divided into areas. Each powder loading area requires a powder loading device to load powder along the contour separately.

[0046] The system analyzes the horizontal contour of the molding chamber, the horizontal center point of the molding chamber and the spraying width, simulates the powder loading path of the powder loading device, and divides the horizontal contour of the molding chamber according to the simulation results to obtain a powder loading area with a regular shape.

[0047] Step S202: determining the area contour and the center of each powder loading area according to the molding chamber image information and the powder loading area.

[0048] The area contour refers to the contour of the powder loading area. The center of the powder loading area refers to the center position of the area contour of the powder loading area. The area contour corresponds to the horizontal contour of the molding chamber, and the center of the powder loading area corresponds to the horizontal center point of the molding chamber. Both the area contour and the center of the powder loading area can be obtained by image analysis of the powder loading area divided from the molding chamber image information.

[0049] Step S203: Determine a filling path for each powder loading area according to the area contour, the center of the powder loading area and the spraying width of each powder loading area. The filling path is stepped and the same as the area contour. The filling path gradually narrows toward the center of the powder loading area.

[0050] The filling path refers to the path of the landing point of the metal powder when the powder filling device fills the metal powder into the molding chamber.

[0051] In this embodiment, each powder loading area is loaded with powder separately, and the filling path is the same as the area contour of each powder loading area. In addition, the powder loading device fills the metal powder into the powder loading area in a step-by-step manner, that is, each powder loading area has multiple circles of filling paths, and the filling paths gradually narrow toward the center of the powder loading area. When the filling of the outer circle filling path is completed, the inner circle filling path is continued to be loaded with powder.

[0052] Step S204: Control the powder loading device to load powder to each powder loading area along the filling path. After the powder loading is completed, control the preset vibration device to vibrate the metal powder to initially smooth the metal powder.

[0053] When all the required metal powders are loaded into the molding chamber, the system vibrates the metal powders through the vibration device, so that the high protrusions in the metal powders are initially smoothed. The method of vibrating the metal powders by the vibration device is not described here, but will be described in detail in the subsequent embodiments.

[0054] Reference Figure 3 The method of vibrating metal powder by a vibrating device comprises the following steps: Step S300: determining the powder ridge position and the powder ridge height according to the metal powder image information and the powder characteristics.

[0055] When the powder loading device is used to load powder along the contour of the powder loading area, metal powder may overlap. When overlap occurs, the metal powder is in the form of convex strips.

[0056] The powder ridge position refers to the actual position of the ridges formed by the overlapping of powder on the metal powder surface. The powder ridge height refers to the height of the overlapping of powder on the metal powder surface. Both the powder ridge position and the powder ridge height can be obtained by image recognition analysis of powder features from the metal powder image information.

[0057] Step S301: determining a powder path according to metal powder image information and powder ridge positions.

[0058] The powder path refers to the shape path of the convex stripe-shaped metal powder protrusions. The powder path can be obtained by performing image recognition analysis on the metal powder at the powder convex stripe position in the metal powder image information.

[0059] Step S302: Matching the vibration movement path of the vibration device according to the powder path.

[0060] For the metal powder at the position of the powder ridge, a vibration device is used to vibrate it so that its height decreases. The vibration device can be set in the molding chamber or outside the molding mold. In this embodiment, the vibration device extends into the molding chamber and vibrates the metal powder at the position of the powder ridge point to point, so the vibration device needs to move along the powder path. The vibration movement path refers to the movement path of the vibration device, and the vibration movement path is consistent with the powder path. The vibration movement path can be directly matched according to the powder path.

[0061] Step S303: matching the vibration amplitude of the vibration device according to the height of the powder ridges.

[0062] The vibration amplitude is the amplitude value when the vibration device vibrates the metal powder. The vibration amplitude is proportional to the height of the powder ridges. The greater the height of the powder ridges, the greater the vibration amplitude.

[0063] Step S304: controlling the vibration device to vibrate the metal powder along the vibration moving path with a vibration amplitude to initially smooth the metal powder.

[0064] When the parameters such as the vibration amplitude and the vibration moving path of the vibration device are determined, the system can control the vibration device according to the obtained parameters. The vibration device extends into the molding chamber to vibrate the metal powder along the powder path to initially smooth it.

[0065] In this embodiment, the vibration device can be arranged outside the molding chamber and vibrate the metal powder outside the molding chamber, and the vibration wave can vibrate the metal powder along its path.

[0066] Reference Figure 4 The method for vibrating the metal powder by the vibration device also includes the following steps: Step S400: Determine the shortest distance between a position point on the powder path and the inner wall of the molding chamber and the shortest path corresponding to the shortest distance according to the metal powder image information and the powder path.

[0067] In this embodiment, the vibration device is controlled to vibrate outside the molding chamber, so it is necessary to determine the shortest distance between the powder path and the outside of the molding chamber to facilitate the vibration of the vibration device. The shortest distance value here refers to the shortest distance from a point on the powder path to the inner wall of the molding chamber. The shortest path is the path where the shortest distance is located.

[0068] The shortest path can be obtained by performing a comprehensive image analysis of the powder path and the inner wall of the molding chamber from the metal powder image information. After the shortest path is determined, the shortest distance value corresponding to the shortest path can be directly analyzed from the metal powder image information.

[0069] Step S401: Screen all shortest paths to determine a shortest path group with a containment relationship, and select a relatively longest path from the shortest path group as an updated shortest path.

[0070] In this embodiment, when the shortest paths from points on different powder paths to the inner wall of the molding chamber are on the same straight line, the vibration device vibrates the points on the powder path that are farther away from the inner wall of the molding chamber. At this time, the points on the powder path that are closer to the inner wall of the molding chamber can also be vibrated synchronously with the vibration waves generated by the vibration device.

[0071] The shortest path group refers to the set of shortest paths that are on the same straight line and correspond to points on different powder paths. The shortest path group can be screened by comprehensive analysis of all the shortest paths. The updated shortest path refers to the shortest path that is ultimately used to control the vibration device. When the relatively longest path in the shortest path group is used as the shortest path, the vibration device vibrates the point on the powder path corresponding to the relatively longest path, and at this time, all points on different powder paths on the updated shortest path can be smoothed by vibration.

[0072] Step S402: determining the wall thickness information of the inner wall of the molding cavity corresponding to the shortest path and the outer wall position of the mold corresponding to the wall thickness information according to the metal powder image information, the shortest path corresponding to the closest distance value and the preset mold wall thickness.

[0073] When the vibration device vibrates outside the molding chamber, the vibration wave needs to pass through the inner wall of the molding chamber. At this time, the thickness of the inner wall of the molding chamber needs to be determined. After the endpoint position of the shortest path on the inner wall of the molding chamber is determined in the metal powder image information, the endpoint position is input into the mold wall thickness database, so that the wall thickness information of the inner wall of the molding chamber at the corresponding position can be matched. The mold wall thickness is a database set by technicians, which contains the wall thickness information of all positions of the molding mold, which will not be described here.

[0074] The mold outer wall position refers to the outer wall position corresponding to the endpoint position of the shortest path on the inner wall of the molding chamber. Once the endpoint position of the shortest path on the inner wall of the molding chamber is determined, the corresponding mold outer wall position can also be synchronously matched according to the mold wall thickness database.

[0075] Step S403: determining the influence distance according to the updated shortest path and wall thickness information.

[0076] The impact distance is the distance between the outer wall position where the vibrating device vibrates and the point on the powder path to be vibrated. The impact distance is the sum of the updated shortest path and the wall thickness information.

[0077] Step S404: matching the vibration amplitude of the vibration device according to the impact distance.

[0078] The corrective vibration amplitude is the vibration amplitude value required when the vibration device vibrates the metal powder at the outer wall of the molding chamber. The corrective vibration amplitude is proportional to the impact distance. The larger the impact distance, the larger the corrective vibration amplitude.

[0079] Step S405: matching the vibration frequency of the vibration device according to the preset powder material.

[0080] The vibration frequency is the frequency value of the vibration device vibrating the metal powder. When the vibration frequency value of the vibration device is close to the natural frequency value of the metal powder, the two can reach resonance, so that the metal powder can be dispersed. According to the powder material of the metal powder, the natural frequency of the metal powder can be matched from the fixed frequency database of the metal, and then the vibration frequency of the vibration device is determined according to the matched natural frequency.

[0081] Step S406: Control the vibration device to vibrate the position points on the powder path in the molding chamber at the outer wall of the mold according to the correction amplitude and the vibration frequency to smooth the metal powder.

[0082] When vibrating the metal powder in the molding chamber, the vibration device is controlled to continuously adjust its position on the outer wall of the mold so that the position points on the powder path in the molding chamber can be vibrated, thereby smoothing the metal powder on the powder path.

[0083] Reference Figure 5 The metal powder pulse blowing method includes the following steps: Step S500: determining the average height of the powder according to the positions of the powder valley points and the powder peak points.

[0084] The average height of powder refers to the estimated height of powder after it is smoothed. After determining the positions of powder valley points and powder peak points in the powder top surface drop model, the height values ​​of all powder valley points and all powder peak points can be directly obtained from the powder top surface drop model. The average height of powder can be obtained by averaging all the obtained parameters.

[0085] Step S501: Determine the smoothing height according to the average height of the powder and the position of the powder peak.

[0086] The smoothing height refers to the height required to smooth the height of the powder peak to the average height of the powder. The smoothing height is the difference between the height of the powder peak and the average height of the powder.

[0087] Step S502: matching the blowing force of the blowing device according to the smoothing height.

[0088] Blowing force refers to the force required by the blowing device to blow the metal powder at the powder peak. The blowing force of the blowing device is proportional to the smoothing height. The greater the smoothing height, the greater the blowing force of the blowing device.

[0089] Step S503: determining the blowing distance according to the powder valley point position and the powder peak point position.

[0090] The blowing distance refers to the distance that the blowing device blows the metal powder from the powder peak position to the powder valley position. The blowing distance can be obtained by analyzing the powder valley position and the powder peak position in the powder top surface drop model.

[0091] Step S504: determining the blowing angle according to the blowing distance and the smoothing height.

[0092] The blowing angle refers to the angle required by the blowing device when blowing metal powder at the powder peak position into the powder valley position. When the blowing distance and the smoothing height are determined, the blowing angle can be calculated according to the trigonometric function relationship in the powder top surface drop model. The blowing angle will change as the smoothing height decreases during the blowing device smoothing the metal powder.

[0093] Step S505: matching the force adjustment amount according to the blowing distance, and correcting the blowing force according to the force adjustment amount to obtain a corrected blowing force.

[0094] When the blowing device is controlled by blowing force to blow air to the powder peak position, only the metal powder can be blown but the metal powder at the powder peak position cannot be directly blown into the powder valley position. Adjustment is also required based on the blowing distance between the powder peak position and the powder valley position.

[0095] The force adjustment amount is the amount of adjustment for adjusting the blowing force of the blowing device. The force adjustment amount is proportional to the blowing device, and the greater the blowing distance, the greater the force adjustment amount.

[0096] The corrected blowing force is the blowing force after the blowing force of the blowing device is corrected. The corrected blowing force is the sum of the blowing force and the force adjustment amount.

[0097] Step S506: According to the corrected blowing force and blowing angle, the blowing device is controlled to perform pulse blowing on the metal powder at the powder peak point in the form of an air cannon to blow the metal powder into the powder valley point.

[0098] According to the relative position relationship between the powder peak point position and the powder valley point position, the blowing device is controlled to correct the blowing force and blowing angle to blow the metal powder. The metal powder can be blown into the powder valley point position to fill the powder valley point position. At this time, the height of the powder peak point position decreases and the height of the powder valley point position increases, and finally both reach the average height of the powder.

[0099] In this embodiment, the blowing device blows air in the form of pulses of an air cannon rather than continuously, so as to avoid continuous blowing that may generate upward airflow and cause a large amount of metal powder to be raised.

[0100] Reference Figure 6 The metal powder pulse blowing method also includes the following steps: Step S600: determining all powder valley positions around the powder peak position according to the metal powder image information, the powder peak position and a preset circumferential filling range.

[0101] In this embodiment, the metal powder at the powder peak position is only blown to the powder valley position within a certain range around it to avoid the powder valley position around other powder peak positions being occupied and only the blowing force of the blowing device can be increased.

[0102] The circumferential filling range is the range of the circumference of the powder peak position set by the technician that can be filled with the metal powder at the current powder peak position, and will not be elaborated here.

[0103] The circumferential filling range of the powder peak position is identified and analyzed from the metal powder image information to obtain all the powder valley positions in the circumferential filling range. The identified powder valley positions can be used to fill the metal powder at the current powder peak position.

[0104] Step S601: Determine the total volume of the valley points according to the average height of the powder and the positions of the powder valley points.

[0105] The total volume of valley points refers to the amount of metal powder that can be accommodated when all powder valley points within the circumferential filling range are filled to the average height of the powder. All powder valley points are analyzed from the powder top surface drop model, and the total volume of valley points can be determined based on the height difference between them and the average height of the powder.

[0106] Step S602: Determine the peak point removal volume according to the average height of the powder and the peak point position of the powder.

[0107] The peak removal volume refers to the volume that needs to be blown away to smooth the metal powder at the powder peak to the average height of the powder. The metal powder at the powder peak is analyzed from the powder top surface drop model, and the peak removal volume can be determined based on the height difference between it and the average height of the powder.

[0108] Step S603: Currently, only when the peak point position displacement volume is greater than the sum of the valley point position volumes, the difference between the peak point position displacement volume and the sum of the valley point position volumes is calculated and defined as the dispersion volume.

[0109] If the volume removed from the peak position is not greater than the sum of the volumes of the valley positions, the metal powder at the powder peak position can be completely blown to the powder valley position within the circumferential filling range, and no other adjustments are required to the blowing device.

[0110] If the volume removed from the peak position is greater than the sum of the volumes of the valley positions, at this time, after the powder valley positions in the circumferential filling range are all filled, there is still a portion of metal powder at the powder peak position that has not been smoothed. In this embodiment, for this portion of metal powder that has not been smoothed, the system controls the air blowing device to blow air vertically downward to disperse this portion of metal powder that has not been smoothed to the surroundings.

[0111] The vibration volume refers to the volume of the remaining metal powder at the powder peak position that still needs to be smoothed by the vibration method after being blown by the blowing device. The vibration volume is the difference between the volume removed from the peak position and the sum of the volumes at the valley position.

[0112] Step S604: matching the dispersion force of the blowing device according to the dispersion volume.

[0113] The dispersion force is the force with which the blowing device blows air at the powder peak position in a dispersion manner. The dispersion force is proportional to the dispersion volume. The larger the dispersion volume, the greater the dispersion force.

[0114] Step S605: Control the air blowing device to blow the metal powder at the powder peak position to the powder valley position in the circumferential filling range. After the air blowing is completed, control the air blowing device vertically downward and vibrate the remaining metal powder at the powder peak position with a vibrating force.

[0115] The powder peak position is blown by the blowing device to blow the metal powder into the powder valley position within the circumferential filling range. If the powder peak position is still not smoothed after the powder valley position is filled, adjust the angle of the blowing device to vertically downward, and continue to blow the powder peak position in the form of an air cannon to vibrate the remaining metal powder to the surroundings.

[0116] When the blowing device blows air to the metal powder, the method for preventing the powder from floating out of the molding chamber comprises the following steps: When the air blowing device blows air to the metal powder, there is a possibility that the metal powder floats upward and floats out from the opening of the molding chamber. When the metal powder floats out, the overall weight of the metal powder in the molding chamber decreases, which may affect the quality of the final product. In this embodiment, an air blowing mesh cover is provided at the opening of the molding chamber. The air blowing mesh cover is in a grid shape, and the air blowing mesh cover has a grid opening for the air blowing device to pass through. The grid opening has air outlet holes in the circumference, and the angle of the air outlet holes can be adjusted. Under normal circumstances, when the metal powder is filled into the molding chamber, the air outlet holes of the air blowing mesh cover blow horizontally, thereby forming a wind curtain at the opening of the molding chamber. At this time, external dust is not easy to enter the molding chamber, and the metal powder in the molding chamber is not easy to float out from the opening of the molding chamber.

[0117] Step S700: determining the floating distance according to the powder peak position and the preset molding chamber opening position.

[0118] The floating distance refers to the distance that the metal powder at the powder peak position needs to travel to float out from the opening position of the molding chamber under the blowing of the blowing device. The floating distance is the vertical straight line distance from the powder peak position to the opening position of the molding chamber.

[0119] Step S701: matching a reference blowing force according to the floating distance.

[0120] The reference blowing force is used to measure whether the blowing device will blow the metal powder out of the opening of the molding chamber. If the blowing force of the blowing device on the metal powder is not greater than the reference blowing force, the metal powder will not float out of the opening of the molding chamber. Otherwise, it will.

[0121] Step S702: When the blowing force of the blowing device at the powder peak position is greater than the reference blowing force, the grille opening group of the blowing mesh cover is matched according to the powder peak position and the circumferential filling range.

[0122] In this embodiment, if metal powder floats out of the opening of the molding chamber, the system will control the air outlet holes of the grille opening of the air blowing mesh cover to blow air into the molding chamber to blow the metal powder back into the molding chamber.

[0123] The blowing device blows the metal powder at the powder peak position to the powder valley position in the circumferential filling range. Therefore, the circumferential filling range of the powder peak position may have the possibility of metal powder floating vertically upward. In order to suppress all the floating metal powder in this range downward, it is necessary to use multiple grille openings to blow air into the molding chamber at the same time. The grille opening group is a collection of multiple grille openings that blow air into the molding chamber at the same time. The position of the grille opening group is determined according to the powder peak position, and the range of the grille opening group can cover the circumferential filling range of the powder peak position.

[0124] Step S703: Control the air outlet holes of the grille opening group to rotate to blow air into the molding chamber to suppress the floating metal powder, and control the remaining grille opening groups to blow air horizontally at a preset horizontal angle to form an air curtain.

[0125] After determining the grille opening group, when the blowing device blows air to the powder peak position, if metal powder floats up, the air outlet holes of the grille opening group are adjusted in angle to face the molding chamber and blow air, while the other grille openings continue to blow air horizontally to prevent external dust.

[0126] The angle control method of the grille opening comprises the following steps: Step S800: determining the blowing range contour according to the powder peak position and the circumferential filling range.

[0127] The blowing range contour refers to the contour of the circumferential filling range of the powder peak position. When the powder peak position is determined, the blowing range contour can be obtained by analyzing and identifying the circumferential filling range of the powder peak position from the metal powder image information.

[0128] Step S801: Determine the pressing angle and pressing distance according to the blowing range contour and the drifting distance.

[0129] In this embodiment, the air outlet holes of the grille opening group do not blow air vertically downward, but blow air toward the contour of the blowing range.

[0130] The pressing angle refers to the angle between the air outlet of the grille opening group and the air blowing position point on the air blowing range contour. The pressing distance refers to the distance between the air outlet of the grille opening group and the air blowing position point on the air blowing range contour.

[0131] The pressing angle and pressing distance are both related to the blowing range contour and the drifting distance. The pressing distance is the hypotenuse of the triangle formed by the pressing distance, the radius of the blowing range contour and the drifting distance, and the pressing angle is the inclination angle of the hypotenuse. According to the trigonometric function relationship, the pressing angle and pressing distance can be calculated from the blowing range contour and the drifting distance.

[0132] Step S802: Matching the pressing and blowing force of the grille opening group according to the pressing distance.

[0133] The pressing and blowing force refers to the force with which the air outlets of the grille opening group blow air into the molding chamber. The pressing and blowing force is proportional to the pressing distance. The greater the pressing distance, the greater the pressing and blowing force.

[0134] Step S803: controlling the inclination of the air outlet holes of the grille opening group according to the pressing angle and the pressing blowing force to blow air to the contour of the blowing range to form a conical wind blocking hood above the contour of the blowing range.

[0135] The wind blown out from the air outlet holes of the grille opening group is continuous wind. When the air outlet holes of the grille opening group blow air along the contour of the blowing range at a pressing angle, the blown wind can form a conical wind blocking hood in the molding chamber that covers the upper circumferential filling range of the powder peak position. The radius of the wind blocking hood gradually increases from top to bottom, and metal powder cannot pass through the wind blocking hood.

[0136] Based on the same inventive concept, an embodiment of the present invention provides a powder loading system for a hydraulic servo forming machine, comprising: The acquisition module is used to acquire the product model of the product to be formed, the image information of the forming chamber and the image information of the metal powder.

[0137] The memory is used to store a program of a powder loading method of a hydraulic servo molding machine.

[0138] The program in the processor and the memory can be loaded and executed by the processor to realize a powder loading method of a hydraulic servo forming machine.

[0139] Based on the same inventive concept, an embodiment of the present invention provides an intelligent terminal, including a memory and a processor, wherein the memory stores a powder loading method for a hydraulic servo forming machine that can be loaded and executed by the processor.

[0140] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A powder loading method for a hydraulic servo forming machine, characterized in that: include: Obtain product model and molding chamber image information of the product to be molded; Determine the powder requirement based on the product model and the preset product database; Determine the shape and size information of the molding chamber according to the molding chamber image information; According to the powder demand and the shape and size information of the molding chamber, a preset powder loading device is controlled to fill the metal powder into the molding chamber and perform preliminary smoothing, and the metal powder image information after the molding chamber is filled with the metal powder is obtained; A powder top surface drop model is established according to metal powder image information and preset powder characteristics; Determine all powder valley point positions and powder peak point positions according to the powder top surface drop model; According to the positions of the valley points and peak points of the powder, a preset air blowing device is controlled to blow pulse air on the metal powder to smooth it.

2. A powder loading method for a hydraulic servo forming machine according to claim 1, characterized in that: Metal powder filling methods include: Determine the horizontal contour of the molding chamber, the horizontal center point of the molding chamber, and the horizontal cross-sectional area of ​​the molding chamber according to the shape and size information of the molding chamber; The bottom surface of the molding chamber is divided into a plurality of powder loading areas with regular shapes according to the horizontal contour of the molding chamber, the horizontal center point of the molding chamber and the preset spraying width; Determine the area contour and the center of each powder loading area according to the molding chamber image information and the powder loading area; Determine the filling path of each powder loading area according to the area contour, the center of the powder loading area and the spraying width of each powder loading area. The filling path is stepped and the same as the area contour. The filling path gradually narrows toward the center of the powder loading area. The powder loading device is controlled to load powder to each powder loading area along the filling path. After the powder loading is completed, the preset vibration device is controlled to vibrate the metal powder to initially smooth the metal powder.

3. The powder loading method of a hydraulic servo forming machine according to claim 2, characterized in that: The vibration method of the vibrating device on the metal powder includes: Determine the powder ridge position and the powder ridge height according to the metal powder image information and the powder characteristics; Determine the powder path according to the metal powder image information and the powder convex strip position; matching the vibration movement path of the vibration device according to the powder path; Match the vibration amplitude of the vibration device according to the height of the powder ridges; The vibration device is controlled by the vibration amplitude to vibrate the metal powder along the vibration moving path to initially smooth the metal powder.

4. The powder loading method for a hydraulic servo forming machine according to claim 3, characterized in that: The vibration device is disposed outside the molding chamber and vibrates the metal powder outside the molding chamber. The vibration method of the metal powder by the vibration device also includes: Determine the shortest distance between a position point on the powder path and the inner wall of the molding chamber and the shortest path corresponding to the shortest distance according to the metal powder image information and the powder path; Screen all the shortest paths, determine the shortest path group with inclusion relationship, and select the relatively longest path from the shortest path group as the updated shortest path; Determine the wall thickness information of the inner wall of the molding chamber corresponding to the shortest path and the outer wall position of the mold corresponding to the wall thickness information according to the metal powder image information, the shortest path corresponding to the closest distance value, and the preset mold wall thickness; Determine the impact distance based on the updated shortest path and wall thickness information; Matching the corrected vibration amplitude of the vibration device according to the impact distance; Match the vibration frequency of the vibration device according to the preset powder material; According to the correction amplitude and vibration frequency, the vibration device is controlled to vibrate the position point on the powder path in the molding chamber at the outer wall of the mold to smooth the metal powder.

5. The powder loading method for a hydraulic servo forming machine according to claim 1, characterized in that: Metal powder pulse blowing methods include: Determine the average height of the powder according to the positions of the powder valley points and the powder peak points; Determine the smoothing height based on the average height of the powder and the position of the powder peak; Match the blowing force of the blowing device according to the smoothing height; Determine the blowing distance according to the positions of the powder valley points and the powder peak points; Determine the blowing angle according to the blowing distance and smoothing height; The force adjustment amount is matched according to the blowing distance, and the blowing force is corrected according to the force adjustment amount to obtain the corrected blowing force; According to the correction of blowing force and blowing angle, the blowing device is controlled to perform pulse blowing on the metal powder at the powder peak point in the form of an air cannon to blow the metal powder into the powder valley point.

6. A powder loading method for a hydraulic servo forming machine according to claim 5, characterized in that: Also includes: Determine all powder valley positions around the powder peak position according to the metal powder image information, the powder peak position and the preset circumferential filling range; Determine the total volume of the valley point location based on the average height of the powder and the location of the powder valley point; Determine the volume removed from the peak point according to the average height of the powder and the position of the powder peak point; Currently, only when the volume removed from the peak position is greater than the sum of the volumes at the valley positions, the difference between the volume removed from the peak position and the sum of the volumes at the valley positions is calculated and defined as the dispersion volume; Match the dispersion force of the blowing device according to the dispersion volume; The air blowing device is controlled to blow the metal powder at the powder peak position to the powder valley position in the circumferential filling range. After the air blowing is completed, the air blowing device is controlled to move vertically downward and vibrate the remaining metal powder at the powder peak position with a vibrating force.

7. The powder loading method for a hydraulic servo forming machine according to claim 6, characterized in that: An air blowing mesh cover is provided at the opening of the molding chamber. The air blowing mesh cover is in a grid shape and has a grid opening for the air blowing device to pass through. The grid opening has air outlet holes in the circumference. When the air blowing device blows air to the metal powder, the method of preventing the powder from floating out of the molding chamber includes: Determine the drifting distance according to the powder peak position and the preset molding chamber opening position; Match the benchmark blowing force according to the floating distance; When the blowing force of the blowing device at the powder peak position is greater than the reference blowing force, the grid opening group of the blowing mesh cover is matched according to the powder peak position and the circumferential filling range; The air outlet holes of the grille opening group are controlled to rotate to blow air into the molding chamber to suppress the floating metal powder, and the remaining grille opening groups are controlled to blow air horizontally at a preset horizontal angle to form an air curtain.

8. The powder loading method for a hydraulic servo forming machine according to claim 7, characterized in that: The angle control methods of the grille opening include: Determine the blowing range contour according to the powder peak position and the circumferential filling range; Determine the pressing angle and pressing distance according to the blowing range contour and drifting distance; Match the pressing and blowing strength of the grille opening group according to the pressing distance; According to the pressing angle and the pressing blowing force, the air outlet holes of the grille opening group are controlled to be tilted to blow air to the contour of the blowing range to form a conical wind blocking hood above the contour of the blowing range.

9. A powder loading system for a hydraulic servo forming machine, characterized in that: include: An acquisition module, used to acquire the product model of the product to be formed, the image information of the forming chamber and the image information of the metal powder; A memory for storing a program of a powder loading method for a hydraulic servo forming machine according to any one of claims 1 to 8; The program in the processor and the memory can be loaded and executed by the processor to realize a powder loading method of a hydraulic servo forming machine.

10. An intelligent terminal, characterized in that: The invention comprises a memory and a processor, wherein the memory stores a powder loading method for a hydraulic servo forming machine which can be loaded and executed by the processor as claimed in any one of claims 1 to 8.

Images