A precision forming method for aluminum alloy comb hanger forgings for textile machinery

Abstract

The embodiment of the present invention discloses a precision forming method for an aluminum alloy comb hanger forging for textile machinery, including obtaining plane graphic data of the comb hanger forging, similar structural feature units and depth distribution data of the similar structural feature units, and constructing a plane angle conversion origin based on the center of mass of the comb hanger forging according to the similar structural feature units; marking the surface of the raw material by scribing using the plane graphic data, and marking the plane angle conversion origin; setting corresponding forming dies, and setting the order of the forming dies according to the degree of deformation of forging; feeding the pretreated raw material into the corresponding forming dies of the similar structural feature units in sequence, and forming corresponding structural elements on the raw material under the forging action of the die section machine to form a forging blank. The present invention ensures the forming accuracy of the structural parts by splitting the structural elements on the aluminum alloy comb hanger and forging them in sequence according to the degree of deformation.

Description

Technical Field

[0001] The embodiment of the present invention relates to the technical field of forging processing, and in particular to a precision forming method of an aluminum alloy comb hanger forging for a textile machinery. Background Art

[0002] The comb hanger is a device that connects the bottom comb with the comb and other structures in the warp knitting machine. In the high-speed operation of textile, the comb hanger of the warp knitting machine is always in a working environment of strong impact, great wear and high stress. Due to the large force it is subjected to, it is very easy to fail in various ways, which seriously affects the stability of the machine. Therefore, in textile machinery, the comb hanger is required to have greater strength, fatigue resistance and toughness.

[0003] At present, aluminum alloy parts with complex structures, especially those with high requirements for strength and fatigue resistance, such as comb hangers, are mostly made by casting. However, casting will produce problems such as coarse structure, many defects, high casting labor intensity and unstable casting quality, resulting in defects such as short service life of processed parts. Compared with casting, die forging can solve these problems, so the performance of such parts processed by die forging is far greater than that of casting products.

[0004] In die forging, due to the influence of the fluidity of the metal, the flow of liquid metal during forming is much worse than that during casting. Therefore, it is much more difficult to form the mold cavity by relying solely on the plastic flow of the metal. Therefore, if the die forging method is used to produce parts with complex shapes and structures, its forming is much more difficult than casting. In the prior art, due to the influence of fluidity, it is difficult to efficiently process the comb hanger with complex structure through the die forging process. Moreover, in the prior art, when die forging is performed, die forging is often performed one by one, but since multiple steps are required in the die forging process, the efficiency of the die forging is low. And the traditional forging method can only forge relatively simple structures and one-time formed structural parts. When the structure on the structural parts is relatively complex, and there are structural elements that affect each other during the forging process, it cannot guarantee that the forging rough material can be perfectly formed after one forging during the forging process, so the accuracy of precision forming cannot be clearly guaranteed. Summary of the invention

[0005] To this end, an embodiment of the present invention provides a precision forming method for an aluminum alloy comb hanger forging for a textile machinery to solve the problems of difficult forming and low die forging efficiency in the prior art.

[0006] In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:

[0007] A precision forming method for an aluminum alloy comb hanger forging for a textile machinery comprises the following specific steps:

[0008] Step 100: obtaining plane graphic data of the comb hanger forging, similar structural characteristic units and depth distribution data of the similar structural characteristic units according to finite element analysis of the three-dimensional data of the comb hanger forging, and constructing a plane angle conversion origin based on the centroid of the comb hanger forging according to the similar structural characteristic units;

[0009] The structural elements contained in the same type of structural feature units include holes, grooves, planes, curved surfaces and protrusions;

[0010] Step 200, cutting an aluminum alloy sheet of a specified length as a rough material, marking the surface of the rough material by scribing using the plane graphic data, and marking the plane angle conversion origin on the surface of the aluminum alloy sheet;

[0011] Step 300, setting corresponding forming dies according to similar structural characteristic units of the same batch of comb hanger forgings, and setting the order of the corresponding forming dies according to the degree of deformation during the forging process;

[0012] Step 400, the pre-treated raw material is clamped by a clamping structure, and sequentially fed into a forming die of a corresponding similar structural feature unit, and corresponding structural elements are formed on the raw material under the forging action of a die segment machine, to form a forging blank with flash;

[0013] Among them, the clamping angle of the clamping structure clamping the forging blank in the current forming die and the rotation angle of conveying it to the next forming die are determined according to the plane angle conversion origin;

[0014] Determine the forging distance of the die press in each forging process compared to the thickness of the rough material based on the depth distribution data of the characteristic units of the same structure;

[0015] Step 500: Perform final forging on the forging blank with flash to obtain a rough forging of a gold comb hanger.

[0016] As a preferred solution of the present invention, in step 100, the method of constructing a plane angle conversion origin based on the center of mass of the comb hanger forging according to the same type of structural feature units specifically includes:

[0017] Step 101: using the quadrant method to divide the similar structural characteristic units of the comb hanger forging into quadrants, and at the same time obtaining the center, center of gravity or center of mass of each structural element contained in the similar structural characteristic units;

[0018] Step 102: Fitting the center, center or centroid of similar structural elements in the same quadrant to the extension line in the plane or space obtains the structural intersection of the similar structural elements, and then obtains the plane angle conversion origin of the similar structural elements in each quadrant by projecting the structural intersection on the plane image data.

[0019] As a preferred embodiment of the present invention, in step 400, the specific steps of pre-treating the wool material include medium frequency heating of the wool material to remove impurities, and the specific steps are:

[0020] The wool material is fed into the medium frequency heating tube, and the medium frequency heating tube completely wraps the wool material, and the medium frequency heating tube is started to quickly heat the wool material so that the surface temperature of the wool material reaches above 400°C, and the wool material is rotated at a high speed to make the surface temperature of the wool material relatively uniform, and after heating to the specified temperature, the temperature is maintained unchanged and kept warm for more than 30 minutes.

[0021] As a preferred embodiment of the present invention, before medium frequency heating and impurity removal, the mass of the wool material is 110% to 115% of the designed mass, and the wool material is weighed after medium frequency heating and impurity removal. When the mass of the wool material is less than 110% of the designed mass, the surface of the wool material is grooved, and wool material that has undergone the same medium frequency heating and impurity removal is inserted into the groove to fill the mass defect.

[0022] As a preferred embodiment of the present invention, the pretreated raw material is heated to 440-450°C and then blanked to obtain a blank, and the blank is kept at a temperature of 440-450°C for 2-4 hours, and the temperature of the blank out of the furnace is not lower than 410°C.

[0023] As a preferred embodiment of the present invention, in step 500, the cooled rough forging blank of the gold comb hanger is cut and polished and then etched and solution treated; the forged blank is subjected to aging treatment and acid-base polishing treatment in sequence; and the qualified forging is placed in a shot blasting machine for shot blasting to obtain the forging.

[0024] As a preferred solution of the present invention, in step 400, the forging blank is heated during the transfer process of two adjacent forming dies.

[0025] As a preferred solution of the present invention, during the transfer process of two adjacent forming dies, a water-based release agent is used to lubricate the blank and the forming dies, and the specific steps of lubrication are:

[0026] The water-based mold release agent is evenly sprayed on the inner surface of the forming die, and a specified volume of the water-based mold release agent is stored in the forming die. During the die forging process, the water-based mold release agent continuously flows into the forming die to achieve continuous lubrication.

[0027] As a preferred solution of the present invention, in step 400, the pre-treated raw material is clamped by a clamping structure and sequentially fed into the forming die. It is necessary to calculate the moving distance of the raw material after being forged by a forming die and fed into the next forming die. The calculation method includes:

[0028] The relative position of the plane angle conversion origin of similar structural feature units on the surface of the aluminum alloy sheet after forging by the forming die is obtained by image acquisition, and the origin position after forging by the forming die is obtained by circle center fitting, and the distance between the origin position and the position set by the forming die is obtained.

[0029] As a preferred embodiment of the present invention, a precision molding system is also included, and the precision molding system includes:

[0030] A molding device, the molding device comprising a molding die set, and a conveying module and a clamping module installed on the molding die set, the clamping module being installed on the conveying module via a rotating module;

[0031] Wherein, the working surfaces of the forming die set are located on the same forging plane;

[0032] The conveying module is used to convey the clamping module in the direction of the forging plane; the clamping module is used to clamp the forging;

[0033] The rotating module is used to realize the angular rotation of the clamping module relative to the forging plane;

[0034] An image acquisition module, which is arranged at the entrance end of each forming die of the forming die set and is used to acquire surface image data of the forging;

[0035] A marking module, arranged at the front end of the molding die set as a whole, for marking the surface of the rough material;

[0036] The central control program module is connected with the image acquisition module, the control system of the mold segment machine of the forming mold group, and the marking module;

[0037] Wherein, the hollow program module is used to obtain the plane graphic data of the comb hanger forging, the same type of structural characteristic units and the depth distribution data of the same type of structural characteristic units according to the finite element analysis of the three-dimensional data of the comb hanger forging, and to construct the plane angle conversion origin based on the center of mass of the comb hanger forging according to the same type of structural characteristic units, and to generate the plane graphic data, the same type of structural characteristic units and the depth distribution data of the same type of structural characteristic units according to the plane graphic data, the same type of structural characteristic units and the depth distribution data of the same type of structural characteristic units, including:

[0038] A marking driving signal of the marking module;

[0039] A conveying distance signal of the conveying module;

[0040] The rotation module drives the rotation angle signal of the clamping device;

[0041] The forging distance signal of the die segment machine of the forming die set.

[0042] The embodiments of the present invention have the following advantages:

[0043] The present invention realizes precise forging of the structure on the aluminum alloy comb hanger by splitting the structural elements on the aluminum alloy comb hanger, selecting the forging sequence according to the deformation degree of the structural elements, and performing forging in sequence, thereby ensuring the forming accuracy of the aluminum alloy comb hanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the implementation of the present invention or the technical solution in the prior art, the following briefly introduces the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0045] Figure 1 It is a schematic diagram of a flow chart in an embodiment of the present invention. DETAILED DESCRIPTION

[0046] The following is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] Embodiment 1:

[0048] like Figure 1 As shown, the present invention provides a precision forming method for an aluminum alloy comb hanger forging for a textile machinery, comprising the following steps:

[0049] Step 100, cutting aluminum alloy bars of a specified length as raw materials, and pre-treating the raw materials;

[0050] Step 200, heating the pretreated raw material to 440-450°C to obtain a blank, and keeping the blank at 440-450°C for 2-4 hours, and the temperature of the blank out of the furnace is not less than 410°C;

[0051] Step 300, feeding the blank into a forming die to obtain a forging blank with flash under the action of a die forging machine, and cooling the forging blank after forging by water cooling;

[0052] Step 400, cutting and grinding the cooled forging blank and then etching and solution treatment;

[0053] Step 500, performing aging treatment and acid-base polishing treatment on the forged blank in sequence;

[0054] Step 600: Put the qualified forgings into a shot blasting machine for shot blasting to obtain forgings.

[0055] In step 100, a 7022 aluminum alloy extrusion bar with a diameter of 45 mm is selected as a rough material, and is cut into a billet with a length of 120 mm along the extrusion direction to obtain a billet with a specific specification of Φ45 mm×120 mm.

[0056] In actual cutting, a certain amount of surplus material needs to be reserved to prevent the loss of the blank during processing. Generally speaking, the surplus material shall not be less than 5% of the whole material. When isothermal forging is performed, the blank flows in the mold cavity and fills the cavity, thereby forming the desired shape. At the same time, the quality of the product is improved by die forging, and the excess blank is discharged to form flash. After subsequent processing, the corresponding product can be obtained.

[0057] In this embodiment, the elements and mass percentages of the 7022 aluminum alloy extruded bar are as shown in Table 1:

[0058] Table 1 Chemical composition of 7022 aluminum alloy (mass fraction, %)

[0059]

[0060] It complies with the national standard for the composition of 7022 aluminum alloy; at the same time, the grain size requirement for 7022 aluminum alloy billet is less than or equal to the first-level grain size and the appearance is free of oil stains, aluminum chips, cracks, scratches, bubbles, corrosion, etc., and meets the appearance inspection standards without burrs and sharp corners.

[0061] In this embodiment, the blank contains a lot of impurities, and it is difficult to meet the quality requirements when it is directly processed. Therefore, in this embodiment, it is necessary to perform a pretreatment of the raw material to remove impurities.

[0062] Conventional pretreatment only includes the removal of the oxide layer, but it is difficult to remove impurities in the raw material. In this embodiment, since the forging temperature of the 7022 aluminum alloy is relatively high, the impurities in the entire raw material can be removed by strengthening the heat.

[0063] In order to reduce the impact of the impurity removal process on the wool, the specific steps of pre-treating the wool include medium frequency heating of the wool to remove impurities. The specific steps are:

[0064] The wool material is fed into the medium frequency heating tube, and the medium frequency heating tube completely wraps the wool material, and the medium frequency heating tube is started to quickly heat the wool material so that the surface temperature of the wool material reaches above 400°C, and the wool material is rotated at a high speed to make the surface temperature of the wool material relatively uniform, and after heating to the specified temperature, the temperature is maintained unchanged and kept warm for more than 30 minutes.

[0065] It should be noted that when using enhanced heating for impurity removal, after heating to a specified temperature and maintaining it for a certain period of time, the internal impurities will be oxidized, and at the same time, an oxide scale will form on its surface. Therefore, after heating, it is necessary to remove the surface oxide scale by upsetting. After the above treatment, the quality of the raw material may be greatly reduced, so it is necessary to weigh its quality twice in succession to ensure that the quality of the raw material after impurity removal is greater than 5% of the designed quality.

[0066] The specific method is:

[0067] Before medium frequency heating and impurity removal, the mass of the wool material is 110% to 115% of the design mass, and the wool material is weighed after medium frequency heating and impurity removal. When the mass of the wool material is less than 110% of the design mass, grooves are cut on the surface of the wool material, and wool material that has undergone the same medium frequency heating and impurity removal is inserted into the groove to fill the mass defect.

[0068] In this embodiment, when the quality of the raw material is reduced after impurities are removed, grooves are cut around the raw material in a circumferential manner, and the raw material that has been processed in the same manner is inserted into the grooves, and the added raw material is forged to form a whole before die forging.

[0069] This method can control the quality of the rough material more accurately and flexibly, that is, the rough material will not be too large, resulting in too large flash, nor will the rough material quality be too small, resulting in defects in the workpiece.

[0070] In the present invention, by adding blanks by grooving and forging to make up for the deficiency, the quality of the product can be improved by releasing part of the stress of the rough material by grooving without affecting the quality of the product.

[0071] In the prior art, the blank is directly used for die forging, so that residual stress exists in the die forging blank, which may affect the quality of the later product. In particular, in the comb hanger of the present invention, the structure is relatively fine and complex. When residual stress exists, it often affects the final product quality. Therefore, in this embodiment, it is necessary to release the stress by cutting grooves.

[0072] It should be emphasized that grooving and filling of blanks are not only required when the quality of the raw material is insufficient, but also when the quality of the raw material is sufficient, grooving is also required, but at this time, filling of blanks is not required.

[0073] In step 300, the blank is die forged at 460-470°C to obtain a forged blank with flash. The die forging is performed using a 2500-ton die forging machine, with an initial forging temperature of 460-470°C and an impact energy of 200r / min.

[0074] In the present invention, the processing is carried out by die forging, which is different from the conventional method in at least the following two aspects:

[0075] Difference 1: The forming die includes a plurality of die forging stations, and the plurality of die forging stations are arranged in sequence according to the processing sequence. The die forging stations are, in sequence according to the processing sequence, an upsetting station, a final forging forming station, and a trimming and punching station.

[0076] Difference 2: Differentiated temperature control is performed on different die forging stations, so that the raw material can be better filled in the die cavity;

[0077] Difference 3: Dynamic release agent addition is used to fill the space between the blank and the mold, thereby promoting the fit between the blank and the mold cavity.

[0078] Regarding the above difference 1, the specific steps of feeding the blank into the forming die and forging it under the action of the die forging machine are:

[0079] Step 301, sending the first blank to the upsetting station for the first die forging process;

[0080] Step 302, sending the first blank after the first die forging process to the final forging forming station for secondary die forging, and sending the second blank to the upsetting station for the first die forging process;

[0081] Step 303, sending the first blank after the second die forging process to the trimming and punching station for trimming and punching, sending the second blank to the final forging station for secondary die forging, and sending the third blank to the upsetting station for the first die forging;

[0082] Repeat steps 301 to 303 to complete the die forging process of multiple blanks.

[0083] That is to say, in the present invention, three processing steps can be completed simultaneously in the same set of molding dies. Of course, the three processing steps mentioned here are not for the same blank, but for multiple blanks to be processed in different steps, that is, three blanks can be processed simultaneously in the same molding die.

[0084] During the die forging process, different temperatures need to be maintained at different die forging stations so that the temperatures of the die forging stations can adapt to different processing procedures. That is to say, in different processing steps of the same billet, the mold temperature must be adjusted so that it can adapt to different die forging requirements, so as to improve the fluidity of the billet in the mold, to promote the complete integration of the billet into the mold, and to improve the density distribution of the product after forming.

[0085] Since different blank properties require different temperatures to be maintained, in this embodiment, the temperature of each die forging station is not specifically described.

[0086] In addition, a water-based release agent is used for lubrication during the forging process, and the ratio of the release agent is 1:8. The temperature after forging reaches ≥350°C. During the die forging process, the temperature of the die is maintained between 160 and 180°C under the action of a heating device. The forged forging blank is water-cooled, and the forging is cooled with water at 60 to 70°C.

[0087] During the die forging process, a water-based release agent is used to lubricate the blank and the forming die. The specific steps of lubrication are:

[0088] The water-based mold release agent is evenly sprayed on the inner surface of the forming die, and a specified volume of the water-based mold release agent is stored in the forming die. During the die forging process, the water-based mold release agent continuously flows into the forming die to achieve continuous lubrication.

[0089] A reflux groove is provided at the top edge of the forming die, and a plurality of notches connected to the die forging station are provided on the reflux groove, and the reflux groove is connected to a liquid storage tank provided in the cavity of the forming die through a drainage groove, and the water-based mold release agent stored in the liquid storage tank is distributed at the edge of the die forging station through the reflux groove and continuously input into the die forging station through the notch to lubricate the blank.

[0090] In the foregoing, the liquid reservoir is filled with a sufficient amount of release agent, and during the entire die forging process, the release agent can be continuously and continuously filled into the forming die, so that the release agent is neither excessive nor missing.

[0091] In this embodiment:

[0092] After trimming and grinding off the excess flash of the forged forgings, the forgings are etched and washed, and the forging blanks after etching are inspected for size, and the forging blanks without forging defects and forming defects are selected to obtain qualified forging blanks. The etching solution and time are soaking in a nitric acid solution with a mass fraction of 15-30% for 10 minutes, and then soaking in a NaOH solution with a mass fraction of 20% for 10 minutes;

[0093] After etching, the forging blank without forging defects and forming defects is subjected to solid solution treatment to obtain the forging blank after solid solution treatment. The temperature of solid solution treatment is 420°C. After the furnace temperature reaches 420°C, the forging is placed in a heat treatment furnace for heat preservation. After the solid solution treatment is completed, the forging is quickly transferred to warm water for cooling for 20 minutes. The transfer time is ≤15s.

[0094] After the solution treatment is completed, the forging blank is subjected to aging treatment, that is, the forging of the aluminum alloy comb hanger is completed. After the furnace temperature reaches the set temperature, the forging is placed in a heat treatment furnace for insulation;

[0095] The qualified forgings after heat treatment are pickled and placed in a solution with a mass ratio of opalescent agent: sulfuric acid: water of 5:2:93 at room temperature for 5 to 10 minutes for degreasing. Then they are washed with clean water and polished with a grinding wheel machine. Then they are polished with water using a grinding liquid as a brightener for 8 to 10 minutes. They are alkaline etched with a 20% NaOH solution at 40 to 50°C for 15 to 20 minutes. Then they are washed with water and polished with a 30% HNO3 solution at room temperature for 1 to 2 minutes. Finally, they are sealed with hot water at 95°C.

[0096] The qualified forgings after heat treatment are placed in a shot blasting machine for shot blasting for 15 minutes to obtain forgings with certain surface work hardening and residual stress.

[0097] After the above treatment, the performance is tested and compared. Under the prior art, samples are cut from cast parts for the same purpose and subjected to tensile tests, which is a comparative example. The above specific preparation process in the present invention is recorded as an embodiment.

[0098] The performance of the aluminum alloy comb hanger prepared in the embodiment and the comparative example is shown in Table 2:

[0099] Table 2

[0100] Rm / MPa Rp0.2 / MPa Elongation / % Hardness / HRB Metallographic structure Comparative Example ≥500 ≥450 ≥8 ≥70 No overburning Example 608 546 11.0 89.5 No overburning

[0101] From the above comparison, we can see that:

[0102] Compared with the performance parameters of the comparative example, the mechanical properties of the forgings of the embodiment are greatly improved, and the metallographic structure also meets the requirements, while the processing cost is reduced and the utilization rate of the material is improved.

[0103] Embodiment 2:

[0104] In the forming of the existing aluminum alloy comb hanger forgings for textile machinery, the above method has been able to improve the mechanical properties of the forgings. However, due to the relatively complex structure of the aluminum alloy comb hanger forgings for textile machinery, the traditional forging method can only forge relatively simple structures and one-time formed structural parts. When the structure on the structural parts is relatively complex and there are structural elements that affect each other during the forging process, it cannot be guaranteed that the forging raw material can be perfectly formed after one forging during the forging process, and the precision of the precision forming cannot be clearly guaranteed. Therefore, the present invention further provides a forging forming method, which ensures the forming accuracy of the structural parts by splitting the structural elements on the aluminum alloy comb hanger and forging them sequentially according to the degree of deformation, including the following specific steps:

[0105] Step 100: obtaining plane graphic data of the comb hanger forging, similar structural characteristic units and depth distribution data of the similar structural characteristic units according to finite element analysis of the three-dimensional data of the comb hanger forging, and constructing a plane angle conversion origin based on the centroid of the comb hanger forging according to the similar structural characteristic units;

[0106] The structural elements contained in the same type of structural feature units include holes, grooves, planes, curved surfaces and protrusions;

[0107] Step 200, cutting an aluminum alloy sheet of a specified length as a rough material, marking the surface of the rough material by scribing using the plane graphic data, and marking the plane angle conversion origin on the surface of the aluminum alloy sheet;

[0108] Step 300, setting corresponding forming dies according to similar structural characteristic units of the same batch of comb hanger forgings, and setting the order of the corresponding forming dies according to the degree of deformation during the forging process;

[0109] Step 400, the pre-treated raw material is clamped by a clamping structure, and sequentially fed into a forming die of a corresponding similar structural feature unit, and corresponding structural elements are formed on the raw material under the forging action of a die segment machine, to form a forging blank with flash;

[0110] Among them, the clamping angle of the clamping structure clamping the forging blank in the current forming die and the rotation angle of conveying it to the next forming die are determined according to the plane angle conversion origin;

[0111] Determine the forging distance of the die press in each forging process compared to the thickness of the rough material based on the depth distribution data of the characteristic units of the same structure;

[0112] Step 500: Perform final forging on the forging blank with flash to obtain a rough forging of a gold comb hanger.

[0113] In step 100, the method for constructing a plane angle conversion origin based on the center of mass of the comb hanger forging according to the same type of structural feature units specifically includes:

[0114] Step 101: using the quadrant method to divide the similar structural characteristic units of the comb hanger forging into quadrants, and at the same time obtaining the center, center of gravity or center of mass of each structural element contained in the similar structural characteristic units;

[0115] Step 102: Fitting the center, center or centroid of similar structural elements in the same quadrant to the extension line in the plane or space obtains the structural intersection of the similar structural elements, and then obtains the plane angle conversion origin of the similar structural elements in each quadrant by projecting the structural intersection on the plane image data.

[0116] In step 400, the specific steps of pre-treating the wool material include removing impurities by medium frequency heating of the wool material, and the specific steps are:

[0117] The wool material is fed into the medium frequency heating tube, and the medium frequency heating tube completely wraps the wool material, and the medium frequency heating tube is started to quickly heat the wool material so that the surface temperature of the wool material reaches above 400°C, and the wool material is rotated at a high speed to make the surface temperature of the wool material relatively uniform, and after heating to the specified temperature, the temperature is maintained unchanged and kept warm for more than 30 minutes.

[0118] Before medium frequency heating and impurity removal, the mass of the wool material is 110% to 115% of the design mass, and the wool material is weighed after medium frequency heating and impurity removal. When the mass of the wool material is less than 110% of the design mass, grooves are cut on the surface of the wool material, and wool material that has undergone the same medium frequency heating and impurity removal is inserted into the groove to fill the mass defect.

[0119] The pretreated raw material is heated to 440-450°C and then blanked to obtain a blank. The blank is kept at a temperature of 440-450°C for 2-4 hours, and the temperature of the blank out of the furnace is not less than 410°C.

[0120] In step 500, the cooled rough forging blank of the gold comb hanger is cut and polished, and then etched and solution treated; the forged blank is subjected to aging treatment and acid-base polishing treatment in sequence; and the qualified forging is placed in a shot blasting machine for shot blasting treatment to obtain a forging.

[0121] In step 400, the forging blank is heated during the transfer process between two adjacent forming dies.

[0122] During the transfer process between two adjacent forming dies, a water-based release agent is used to lubricate the blank and the forming die. The specific steps of lubrication are as follows:

[0123] The water-based mold release agent is evenly sprayed on the inner surface of the forming die, and a specified volume of the water-based mold release agent is stored in the forming die. During the die forging process, the water-based mold release agent continuously flows into the forming die to achieve continuous lubrication.

[0124] In step 400, the pre-treated raw material is clamped by a clamping structure and sent into the forming die in sequence. It is necessary to calculate the moving distance of the raw material sent to the next forming die after being forged by the forming die once. The calculation method includes:

[0125] The relative position of the plane angle conversion origin of similar structural feature units on the surface of the aluminum alloy sheet after forging by the forming die is obtained by image acquisition, and the origin position after forging by the forming die is obtained by circle center fitting, and the distance between the origin position and the position set by the forming die is obtained.

[0126] The present invention further provides a precision forming system for an aluminum alloy comb hanger forging for a textile machinery, the precision forming system comprising:

[0127] A molding device, the molding device comprising a molding die set, and a conveying module and a clamping module installed on the molding die set, the clamping module being installed on the conveying module via a rotating module;

[0128] Wherein, the working surfaces of the forming die set are located on the same forging plane;

[0129] The conveying module is used to convey the clamping module in the direction of the forging plane; the clamping module is used to clamp the forging;

[0130] The rotating module is used to realize the angular rotation of the clamping module relative to the forging plane;

[0131] An image acquisition module, which is arranged at the entrance end of each forming die of the forming die set and is used to acquire surface image data of the forging;

[0132] A marking module, arranged at the front end of the molding die set as a whole, for marking the surface of the rough material;

[0133] The central control program module is connected with the image acquisition module, the control system of the mold segment machine of the forming mold group, and the marking module;

[0134] Wherein, the hollow program module is used to obtain the plane graphic data of the comb hanger forging, the same type of structural characteristic units and the depth distribution data of the same type of structural characteristic units according to the finite element analysis of the three-dimensional data of the comb hanger forging, and to construct the plane angle conversion origin based on the center of mass of the comb hanger forging according to the same type of structural characteristic units, and to generate the plane graphic data, the same type of structural characteristic units and the depth distribution data of the same type of structural characteristic units according to the plane graphic data, the same type of structural characteristic units and the depth distribution data of the same type of structural characteristic units, including:

[0135] A marking driving signal of the marking module;

[0136] A conveying distance signal of the conveying module;

[0137] The rotation module drives the rotation angle signal of the clamping device;

[0138] The forging distance signal of the die segment machine of the forming die set.

[0139] Although the present invention has been described in detail above by general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A precision forming method for aluminum alloy comb hanger forgings for textile machinery, characterized in that: The specific steps include: Step 100: obtaining plane graphic data of the comb hanger forging, similar structural characteristic units and depth distribution data of the similar structural characteristic units according to finite element analysis of the three-dimensional data of the comb hanger forging, and constructing a plane angle conversion origin based on the centroid of the comb hanger forging according to the similar structural characteristic units; Among them, the structural elements contained in the same type of structural feature units include holes, grooves, planes, curved surfaces and protrusions; Step 200, cutting an aluminum alloy sheet of a specified length as a rough material, marking the surface of the rough material by scribing using the plane graphic data, and marking the plane angle conversion origin on the surface of the aluminum alloy sheet; Step 300, setting corresponding forming dies according to similar structural characteristic units of the same batch of comb hanger forgings, and setting the order of the corresponding forming dies according to the degree of deformation during the forging process; Step 400, the pre-treated raw material is clamped by a clamping structure, and sequentially fed into a forming die of a corresponding similar structural feature unit, and corresponding structural elements are formed on the raw material under the forging action of a die segment machine, to form a forging blank with flash; Among them, the clamping angle of the clamping structure clamping the forging blank in the current forming die and the rotation angle of conveying it to the next forming die are determined according to the plane angle conversion origin; Determine the forging distance of the die press in each forging process compared to the thickness of the rough material based on the depth distribution data of the characteristic units of the same structure; Step 500, performing final forging on the forging blank with flash to obtain a rough forging of a gold comb hanger; In step 100, the method for constructing a plane angle conversion origin based on the center of mass of the comb hanger forging according to the same type of structural feature units specifically includes: Step 101: using the quadrant method to divide the similar structural characteristic units of the comb hanger forging into quadrants, and at the same time obtaining the center, center of gravity or center of mass of each structural element contained in the similar structural characteristic units; Step 102: Fitting the center, center or centroid of the same structural element in the same quadrant with the extended line in the plane or space to obtain the structural intersection of the same structural element, and obtaining the plane angle conversion origin of the same structural element in each quadrant by projecting the structural intersection on the plane image data; In step 400, the pre-treated raw material is clamped by a clamping structure and sent into the forming die in sequence. It is necessary to calculate the moving distance of the raw material sent to the next forming die after being forged by the forming die once. The calculation method includes: The relative position of the plane angle conversion origin of similar structural feature units on the surface of the aluminum alloy sheet after forging by the forming die is obtained by image acquisition, and the origin position after forging by the forming die is obtained by circle center fitting, and the distance between the origin position and the position set by the forming die is obtained.

2. The precision forming method of an aluminum alloy comb hanger forging for textile machinery according to claim 1 is characterized in that: In step 400, the specific steps of pre-treating the wool material include removing impurities by medium frequency heating of the wool material, and the specific steps are: The wool material is fed into the medium frequency heating tube, and the medium frequency heating tube completely wraps the wool material, and the medium frequency heating tube is started to quickly heat the wool material so that the surface temperature of the wool material reaches above 400°C, and the wool material is rotated at a high speed to make the surface temperature of the wool material relatively uniform, and after heating to the specified temperature, the temperature is maintained unchanged and kept warm for more than 30 minutes.

3. The precision forming method of an aluminum alloy comb hanger forging for textile machinery according to claim 2, characterized in that: Before medium frequency heating and impurity removal, the mass of the raw material is 110%~115% of the design mass, and the raw material is weighed after medium frequency heating and impurity removal. When the mass of the raw material is less than 110% of the design mass, grooves are cut on the surface of the raw material, and raw material that has undergone the same medium frequency heating and impurity removal is inserted into the groove to fill the mass defect.

4. The precision forming method of an aluminum alloy comb hanger forging for textile machinery according to claim 3 is characterized in that: The pretreated raw material is heated to 440-450°C and then blanked to obtain a blank. The blank is kept at 440-450°C for 2-4 hours, and the temperature of the blank out of the furnace is not less than 410°C.

5. The precision forming method of an aluminum alloy comb hanger forging for textile machinery according to claim 1, characterized in that: In step 500, the cooled rough forging blank of the gold comb hanger is cut and polished, and then etched and solution treated; the forged blank is subjected to aging treatment and acid-base polishing treatment in sequence; The qualified forgings are placed in a shot blasting machine for shot blasting to obtain forgings.

6. The precision forming method of an aluminum alloy comb hanger forging for textile machinery according to claim 1, characterized in that: In step 400, the forging blank is heated during the transfer process between two adjacent forming dies.

7. The precision forming method of an aluminum alloy comb hanger forging for textile machinery according to claim 1, characterized in that: During the transfer process between two adjacent forming dies, a water-based release agent is used to lubricate the blank and the forming die. The specific steps of lubrication are as follows: The water-based mold release agent is evenly sprayed on the inner surface of the forming die, and a specified volume of the water-based mold release agent is stored in the forming die. During the die forging process, the water-based mold release agent continuously flows into the forming die to achieve continuous lubrication.

8. The precision forming method of an aluminum alloy comb hanger forging for textile machinery according to claim 1, characterized in that: Also included is a precision forming system, the precision forming system comprising: A molding device, the molding device comprising a molding die set, and a conveying module and a clamping module installed on the molding die set, the clamping module being installed on the conveying module via a rotating module; Wherein, the working surfaces of the forming die set are located on the same forging plane; The conveying module is used to convey the clamping module in the direction of the forging plane; the clamping module is used to clamp the forging; The rotating module is used to realize the angular rotation of the clamping module relative to the forging plane; An image acquisition module, which is arranged at the entrance end of each forming die of the forming die set and is used to acquire surface image data of the forging; A marking module, arranged at the front end of the molding die set as a whole, for marking the surface of the rough material; The central control program module is connected with the image acquisition module, the control system of the mold segment machine of the forming mold group, and the marking module; The central control program module is used to obtain the plane graphic data of the comb hanger forging, the same structural characteristic units and the depth distribution data of the same structural characteristic units according to the finite element analysis of the three-dimensional data of the comb hanger forging, and to construct the plane angle conversion origin based on the center of mass of the comb hanger forging according to the same structural characteristic units, and to generate the plane graphic data, the same structural characteristic units and the depth distribution data of the same structural characteristic units according to the plane graphic data, the same structural characteristic units and the depth distribution data of the same structural characteristic units, including: A marking driving signal of the marking module; A conveying distance signal of the conveying module; The rotation module drives the rotation angle signal of the clamping module; The forging distance signal of the die segment machine of the forming die set.

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