A stamping apparatus for a metal part of an automobile

Abstract

The application relates to the technical field of metal stamping equipment, in particular to a stamping equipment for automobile metal parts, which comprises an upper die, a lower die, an oil injection hole and a material discharging hole, the upper die can move along the vertical direction, the upper die comprises an upper draw die and an upper flanging die, and the upper flanging die is slidably arranged outside the upper draw die. The lower edge of the upper draw die, the upper edge of the lower draw die, the lower edge of the inner side of the upper flanging die and the upper edge of the inner side of the lower flanging die are provided with chamfers, so that the cavity area is formed above and below the flanging position of the blank, more lubricating oil can be accommodated above and below the flanging area of the blank, and then more lubricating oil is sprayed to the flanging position of the blank in the cavity area through the oil injection assembly, so that the friction heat generated in the flanging process of the blank can be fully absorbed by the lubricating oil.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metal stamping equipment, in particular to a stamping equipment for automobile metal parts. BACKGROUND

[0002] Stamping is the core process of automobile body forming, which needs to spread the metal coil material through the uncoiler, remove the wrinkles through the leveler, and then cut the blank into a suitable shape for stamping through the shearing machine. The blank is deformed by the stamping equipment (mold) under the pressure of the press machine to form specific shaped parts such as doors, hoods, fenders, roofs, etc. Common stamping processes include:

[0003] Blanking: cutting out the general outline of the part;

[0004] Drawing: pressing a flat plate into a curved surface;

[0005] Punching: machining bolt holes, weight reduction holes, etc.

[0006] Flanging: folding the edges of the part.

[0007] Among them, in the flanging process, the blank is plastically deformed under the pressure of the mold, and a large amount of friction heat is generated between the surface of the blank and the mold cavity. At this time, the surfaces of the two may be "stuck" due to friction heating, resulting in scratches, fuzz, depressions, and other defects on the surface of the part, as well as damage to the surface precision of the mold. To solve this problem, the common method in the prior art is to spray lubricating oil on the surface of the blank, forming an isolation film between the blank and the mold, converting the direct friction between solids into liquid friction between lubricating oil molecules, thereby significantly reducing the friction coefficient and avoiding the problem of sticking and surface damage.

[0008] For example, the technical solution disclosed in the Chinese utility model patent with the authorized announcement number CN207982085U, the invention name of which is "Automobile parts stamping equipment capable of improving lubrication effect", lubricates the bending position of the blank with lubricating oil. However, the above technical solution has the following problems in production practice: it is difficult to control the amount of lubricating oil added. If the amount of lubricating oil added is too much, the upper and lower molds may not close tightly, and if the amount of lubricating oil added is too little, the heat absorption effect of the lubricating oil is limited. SUMMARY

[0009] Therefore, it is necessary to provide a stamping equipment for automobile metal parts to solve the problem of difficult control of the amount of lubricating oil added in view of the problems existing in the current stamping equipment.

[0010] The above-mentioned purpose is achieved by the following technical solutions:

[0011] A stamping equipment for automobile metal parts comprises:

[0012] an upper die capable of moving in a vertical direction, the upper die comprising an upper draw die and an upper flanging die, the upper flanging die being slidingly arranged outside the upper draw die;

[0013] a lower die comprising a lower draw die and a lower flanging die, the lower flanging die being slidingly arranged outside the lower draw die;

[0014] wherein the lower edge of the upper draw die, the upper edge of the lower draw die, the lower edge of the inner side of the upper flanging die, and the upper edge of the inner side of the lower flanging die are all provided with chamfers;

[0015] oil injection holes for spraying lubricating oil outward, the oil injection holes being divided into two groups, the two groups of oil injection holes being arranged in the upper draw die and the lower flanging die respectively, and the oil injection holes being directed toward the flanging position of the blank;

[0016] material discharge holes for discharging lubricating oil at the flanging position of the blank, the material discharge holes being divided into two groups, the two groups of material discharge holes being arranged in the upper flanging die and the lower draw die respectively, and the material discharge holes being directed toward the flanging position of the blank.

[0017] Preferably, the oil injection holes and the material discharge holes are alternately arranged along the flanging contour line of the blank.

[0018] Preferably, the lubricating oil sprayed by the oil injection holes is in an atomized state.

[0019] Preferably, the lubricating oil has an electric charge.

[0020] Preferably, an upper limit component is arranged between the upper draw die and the upper flanging die, the upper limit component being used to limit the relative sliding distance between the upper draw die and the upper flanging die.

[0021] Preferably, the upper limit component comprises an upper limit block and an upper limit strip, the upper limit block being elastically connected to the lower side of the upper draw die, and the upper limit block being capable of moving toward or away from the upper draw die in a horizontal direction, the upper limit strip being arranged at the inner lower part of the upper flanging die, and the upper limit block and the upper limit strip being capable of being stopper-fitted.

[0022] Preferably, a lower limit component is arranged between the lower draw die and the lower flanging die, the lower limit component being used to limit the relative sliding distance between the lower draw die and the lower flanging die.

[0023] Preferably, the lower limit component comprises a lower limit block and a lower limit strip, the lower limit block being elastically connected to the inner upper part of the lower flanging die, and the lower limit block being capable of moving toward or away from the lower flanging die in a horizontal direction, the lower limit strip being arranged at the upper side of the lower draw die, and the lower limit block and the lower limit strip being capable of being stopper-fitted.

[0024] Preferably, the stamping device for the automobile metal part further comprises an oil injection assembly, which is used for delivering the lubricating oil in the charged atomized state to the oil injection hole and spraying the lubricating oil out of the oil injection hole to the flanging position of the blank.

[0025] Preferably, the stamping device for the automobile metal part further comprises a material discharging assembly, which is used for gradually discharging the lubricating oil at the flanging position of the blank during the flanging process through the material discharging hole.

[0026] The beneficial effects of the present application are as follows:

[0027] The present application has the beneficial effects that: BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 FIG. 1 is a schematic diagram of the stamping device for the automobile metal part according to the present application;

[0029] Figure 2 FIG. 3 is a bottom view of the upper die in the stamping device for the automobile metal part according to the present application;

[0030] Figure 3 FIG. 5 is a top view of the lower die in the stamping device for the automobile metal part according to the present application;

[0031] Figure 4 FIG. 7 is a top view of Figure 1 ;

[0032] Figure 5 FIG. 9 is an A-A sectional view of Figure 4 ;

[0033] Figure 6 FIG. 11 is a schematic diagram of the structure at position B in Figure 5 ;

[0034] Figure 7 FIG. 13 is a schematic diagram of the structure at position C in Figure 6 ;

[0035] Figure 8 for Figure 4 D-D section view;

[0036] Figure 9 for Figure 8 E structure enlarged schematic view;

[0037] Figure 10 for the structure of the upper flanging die and the upper limit block of the stamping equipment of the automobile metal parts of the application is shown;

[0038] Figure 11 for Figure 10 F structure enlarged schematic view;

[0039] Figure 12 for the structure of the automobile parts one is shown;

[0040] Figure 13 for the structure of the automobile parts two is shown.

[0041] wherein:

[0042] 100, upper die; 110, upper drawing die; 120, upper flanging die;

[0043] 200, lower die; 210, lower drawing die; 220, lower flanging die;

[0044] 300, chamfer;

[0045] 410, oil injection hole;

[0046] 510, discharge hole;

[0047] 600, upper limit assembly; 610, upper limit block; 620, upper limit clamping strip;

[0048] 700, lower limit assembly; 710, lower limit block; 720, lower limit clamping strip;

[0049] 800, automobile parts one;

[0050] 900, automobile parts two. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical scheme and advantages of the application more clear and obvious, the application is further described in detail below through examples and in combination with the drawings. It should be understood that the specific examples described herein are only used to explain the application and do not limit the application.

[0052] The serial numbers of components in the present application, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequence or technical meaning. The "connection" and "coupling" in the present application include direct and indirect connection (coupling) unless otherwise specified. In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0053] In the present application, unless otherwise explicitly specified and limited, the "upper" or "lower" of a first feature to a second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the "over", "above" and "on" of the first feature to the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "under", "below" and "under" of the first feature to the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0054] As shown in Figures 1 to 12 A stamping device for stamping a metal part of an automobile into an automobile part 800, the stamping device for stamping a metal part of an automobile comprises an upper die 100, a lower die 200, an oil injection hole 410 and a discharge hole 510, the upper die 100 is movable in a vertical direction, the upper die 100 comprises an upper draw die 110 and an upper flanging die 120, the upper flanging die 120 is slidingly arranged outside the upper draw die 110, the lower die 200 comprises a lower draw die 210 and a lower flanging die 220, the lower flanging die 220 is slidingly arranged outside the lower draw die 210, wherein the lower edge of the upper draw die 110, the upper edge of the lower draw die 210, the inner lower edge of the upper flanging die 120 and the inner upper edge of the lower flanging die 220 are all provided with chamfers 300, the oil injection hole 410 is used for spraying lubricating oil outward, the oil injection hole 410 is divided into two groups, the two groups of oil injection holes 410 are respectively arranged in the upper draw die 110 and the lower flanging die 220, and the oil injection hole 410 faces the flanging position of the blank, the discharge hole 510 is used for discharging the lubricating oil at the flanging position of the blank, the discharge hole 510 is divided into two groups, the two groups of discharge holes 510 are respectively arranged in the upper flanging die 120 and the lower draw die 210, and the discharge hole 510 faces the flanging position of the blank.

[0055] When the punch forming is performed, the operator first manually or through an automatic feeding device feeds the blank to a set position between the upper die 100 and the lower die 200, and then controls the upper die 100 to move downward by a first preset distance (i.e., the upper draw die 110 and the upper flanging die 120 move downward by the first preset distance synchronously), so that the upper draw die 110 and the lower draw die 210 cooperate to complete the punch forming of the blank. At this time, the upper draw die 110 and the upper flanging die 120 are on the same parting surface, and the upper draw die 110 and the upper flanging die 120 are in close contact with the upper forming surface of the blank. At the same time, since the lower edge of the upper draw die 110 and the inner lower edge of the upper flanging die 120 are both provided with the chamfer 300, the upper draw die 110, the upper flanging die 120 and the blank enclose a cavity region above the flanging position of the blank. Similarly, since the upper edge of the lower draw die 210 and the inner upper edge of the lower flanging die 220 are both provided with the chamfer 300 at this time, the lower draw die 210, the lower flanging die 220 and the blank enclose a cavity region below the flanging position of the blank. Thus, the cavity region is formed above and below the flanging position of the blank, so that more lubricating oil can be accommodated above and below the flanging position of the blank. At this time, more lubricating oil is sprayed into the oil injection hole 410. Since the oil injection hole 410 faces the flanging position of the blank, the lubricating oil is attached to the flanging position of the blank after the lubricating oil is sprayed into the cavity on the corresponding side. Next, the upper flanging die 120 is controlled to continue to move downward by a second preset distance. At this time, the upper flanging die 120 indirectly pushes the lower flanging die 220 to move downward synchronously through the blank, so that the flanging forming of the blank is completed through the upper flanging die 120 and the lower flanging die 220. During the flanging forming of the blank, the flanging position of the blank slides downward relative to the upper draw die 110 and the lower draw die 210. At this time, the friction heat generated by the mutual sliding of the blank and the upper draw die 110 and the lower draw die 210 is absorbed by the lubricating oil. Since more lubricating oil is accommodated above and below the flanging position of the blank, the upper draw die 110, the lower draw die 210 and the blank are not easy to overheat due to relative sliding. At the same time, since the discharge hole 510 faces the flanging position of the blank and is in communication with the corresponding cavity region, the lubricating oil is gradually squeezed into the discharge hole 510 as the flanging forming of the blank is completed. Thus, the problem of incomplete die closing of the upper die 100 and the lower die 200 due to the lubricating oil remaining between the upper die 100 and the lower die 200 is avoided. When the upper die 100 and the lower die 200 are closed, the blank is punch formed into the automobile part 800. Next, the upper die 100 and the lower die 200 are reset to the initial position, and the next blank can be punch formed.

[0056] In summary, the present application is characterized in that the lower edge of the upper draw die 110, the upper edge of the lower draw die 210, the inner lower edge of the upper flanging die 120 and the inner upper edge of the lower flanging die 220 are provided with chamfers 300, so that the cavity area is formed above and below the flanging position of the blank, so that the flanging area of the blank can accommodate more lubricating oil above and below, and then the flanging position of the blank in the cavity area is sprayed with more lubricating oil by the oil injection assembly, so as to ensure that the friction heat generated during the flanging of the blank can be fully absorbed by the lubricating oil, and at the same time, since the discharge hole 510 is in communication with the corresponding cavity area, the excess lubricating oil is gradually squeezed into the discharge hole 510 as the blank is flanged and formed, so that the amount of lubricating oil is optimized and adjusted, which can not only ensure that the friction heat generated during the flanging and forming is fully absorbed by the lubricating oil, but also gradually reduce the lubricating oil as the flanging and forming is completed, so that the problem of tight closing of the upper die 100 and the lower die 200 is avoided.

[0057] Further, the upper draw die 110 and the upper flanging die 120 are connected with a hydraulic system, and the upper draw die 110 and the upper flanging die 120 are driven to move in the vertical direction by the hydraulic system.

[0058] Further, the bottom of the lower flanging die 220 is provided with a spring return device, which is used to reset the lower flanging die 220 to the initial position after the upper flanging die 120 is reset by the spring force of the spring return device.

[0059] It should be further pointed out that the discharge hole 510 not only gradually squeezes out the lubricating oil from between the upper die 100 and the lower die 200, but also squeezes out the air from between the upper die 100 and the lower die 200 if the parting surface of the upper die 100 and the lower die 200 causes air to remain in the upper die 100 and the lower die 200 during the closing process.

[0060] In further embodiments, as shown in Figure 10 and Figure 11 , the oil injection hole 410 and the discharge hole 510 are alternately arranged along the flanging contour line of the blank.

[0061] The oil injection hole 410 and the discharge hole 510 are alternately arranged along the flanging contour line of the blank, so as to increase the consistency of the oil film thickness at each position of the flanging position of the blank during the process of squeezing out the lubricating oil into the discharge hole 510, and to avoid the problem of local thick or thin oil film.

[0062] In further embodiments, the lubricating oil sprayed by the oil injection hole 410 is in an atomized state.

[0063] It can be understood that the atomized lubricating oil exists in the form of small droplets with a diameter of several microns to tens of microns, which can more evenly cover the surface of the blank and form a continuous, thin and uniform oil film, and is especially suitable for lubricating the flanging or stamping position of complex shapes such as curved surfaces, grooves, hole edges, etc. It can reduce the waste caused by "accumulation" or "flowing" of large droplets in traditional spraying. In addition, the atomized spraying can accurately control the amount of lubricating oil by adjusting the air pressure, flow rate and other parameters.

[0064] In order to make the lubricating oil sprayed out of the oil injection hole 410 in an atomized state, further, the stamping equipment for the automobile metal part further comprises an oil injection assembly, the oil injection assembly comprising a high-pressure pump, an oil inlet pipe and an atomizing nozzle, the input end of the high-pressure pump being connected to the oil tank of the lubricating oil, the output end of the high-pressure pump being connected with the oil inlet pipe, the end of the oil inlet pipe away from the high-pressure pump being inserted into the oil injection hole 410, and the end of the oil inlet pipe inserted into the oil injection hole 410 being connected with the atomizing nozzle. In use, the high-pressure pump is started, the high-pressure pump sucks the lubricating oil in the oil tank into its interior, and after being pressurized, the lubricating oil is delivered to the position of the atomizing nozzle through the oil inlet pipe, and is sprayed out through the atomizing nozzle. Then the atomized lubricating oil flows along the oil injection hole 410 to the corresponding cavity area, thereby adhering to the flanging position of the blank.

[0065] In a further embodiment, the atomized and sprayed lubricating oil has an electric charge.

[0066] It can be understood that the charged oil mist droplets will generate electrostatic attraction with the uncharged surface of the blank, so that the lubricating oil droplets are more firmly adsorbed on the flanging position, to prevent the lubricating oil droplets from falling off due to mechanical force or airflow scouring during the flanging process, thereby solving the problem that the ordinary atomized oil film is easily "scattered". For the areas such as grooves, corners, holes and other areas of the blank that are difficult to reach by traditional lubrication, the charged oil mist will uniformly diffuse due to electrostatic repulsion, and at the same time will be attracted to the surface of the blank, and will actively "penetrate" into the fine gaps, thereby achieving no dead angle coverage and avoiding local lubrication deficiency.

[0067] In order to make the oil mist sprayed into the cavity area have an electric charge, a needle electrode is further provided near the nozzle, and a high voltage is applied to make the air around the electrode produce corona discharge, thereby generating a large number of positive and negative ions. When the high-pressure oil mist is sprayed out of the atomizing nozzle, it will collide with these ions and be charged.

[0068] In a further embodiment, the non-flanging position of the blank has an electric charge, and the polarity of the electric charge of the non-flanging position of the blank is the same as the polarity of the electric charge contained in the oil mist of the lubricating oil.

[0069] Because the same kind of charges repel each other, the oil mist can be prevented from adhering to the non-flanging position, which not only avoids waste of lubricating oil, but also facilitates subsequent cleaning of the automobile part after stamping and forming, and further prevents the material at the non-flanging position of the blank from flowing disorderly or even wrinkling due to lubrication.

[0070] In a further embodiment, as shown in Figure 6 An upper limit assembly 600 is arranged between the upper draw die 110 and the upper flanging die 120, and is used to limit the relative sliding distance between the upper draw die 110 and the upper flanging die 120. In this way, the control accuracy of the moving distance of the upper flanging die 120 is improved, so as to prevent the upper flanging die 120 from moving too far.

[0071] In a further embodiment, as shown in Figure 7 The upper limit assembly 600 includes an upper limit block 610 and an upper limit block 620. The upper limit block 610 is elastically connected to the lower side of the upper draw die 110, and can move towards or away from the upper draw die 110 in the horizontal direction. Specifically, a limiting guide groove is formed on the upper draw die 110, and the upper limit block 610 is slidingly connected in the limiting guide groove. The bottom of the limiting guide groove is connected to the upper limit block 610 by a spring. The upper limit block 620 is arranged on the inner lower side of the upper flanging die 120. The upper limit block 610 and the upper limit block 620 can be stop-fitted. Specifically, a stop protrusion is formed on the lower side of the upper limit block 610, and is located directly below the upper limit block 620.

[0072] When the upper flanging die 120 moves downward, the upper flanging die 120 drives the upper limit block 620 to move downward synchronously. When the upper limit block 620 abuts against the stop protrusion, the upper flanging die 120 cannot continue to move downward. At this time, the blank flanging is completed. Compared with driving the upper flanging die 120 to move downward by the hydraulic system only, the cooperation of the upper limit block 620 and the stop protrusion can control the moving distance of the upper flanging die 120 more accurately.

[0073] It should be further pointed out that, in the present embodiment, as shown in Figure 7 The oil injection hole 410 corresponding to the upper draw die 110 is preferably formed on the upper limit block 610.

[0074] In a further embodiment, as shown in Figure 6 A lower limit assembly 700 is arranged between the lower draw die 210 and the lower flanging die 220, and is used to limit the relative sliding distance between the lower draw die 210 and the lower flanging die 220.

[0075] In this way, the control accuracy of the moving distance of the lower flanging die 220 is improved, so as to prevent the lower flanging die 220 from moving too far.

[0076] In a further embodiment, as shown in Figure 7As shown, the lower limit component 700 includes a lower limit clamping block 710 and a lower limit clamping strip 720. The lower limit clamping block 710 is elastically connected to the inner upper portion of the lower flanging die 220 and can move closer to or away from the lower flanging die 220 in the horizontal direction. Specifically, a limiting guide groove is formed on the lower flanging die 220, and the lower limit clamping block 710 is slidingly connected in the limiting guide groove. The lower limit clamping block 710 is connected to the groove bottom of the limiting guide groove by a spring. The lower limit clamping strip 720 is arranged on the upper side of the lower draw die 210. The lower limit clamping block 710 and the lower limit clamping strip 720 can be stopper matched. Specifically, a stopper protrusion is formed on the upper portion of the lower limit clamping block 710, and the stopper protrusion is located directly above the lower limit clamping strip 720.

[0077] When the upper flanging die 120 moves downward, the blank is indirectly pushed by the upper flanging die 120 to move the lower flanging die 220 downward synchronously. The lower flanging die 220 drives the stopper protrusion to move downward synchronously. When the stopper protrusion abuts against the lower limit clamping strip 720, the lower flanging die 220 cannot continue to move downward. At this time, the flanging of the blank is completed.

[0078] Similarly, in the present embodiment, as shown in Figure 7 The oil injection hole 410 corresponding to the lower flanging die 220 is preferably formed on the lower limit clamping block 710.

[0079] In further embodiments, the stamping device for automobile metal parts further includes a discharging assembly. The discharging assembly includes a negative pressure pump and a discharging pipe. The output end of the negative pressure pump is connected to the discharging pipe. The end of the discharging pipe away from the air pump is inserted into the discharging hole 510. When it is necessary to discharge the oil mist in the discharging hole 510, the negative pressure pump is started. Under the driving action of the negative pressure pump, the oil mist in the discharging hole 510 is discharged outward through the discharging pipe.

[0080] In other embodiments, for the automobile part 800 being a part with different stamping thicknesses, the corresponding upper draw die 110 and the lower draw die 210 should be composed of multiple upper draw sub-dies and lower draw sub-dies, which are independent of each other and controlled by independent hydraulic systems. When flanging, the control method of the hydraulic system can be divided into two kinds. The first kind is a preset program. The hydraulic system first drives multiple upper draw sub-dies to move downward by a certain distance at the same time to complete the stamping of positions with smaller stamping depth. Then, the upper draw sub-dies corresponding to the positions with smaller stamping depth are excluded from moving downward by a certain distance to complete the stamping of positions with second depth. Similarly, until the entire blank is stamped. The second kind is to set corresponding pressure sensors at the parting surface of the upper draw sub-die and the lower draw sub-die. The set pressure threshold of the pressure sensor corresponds to different stamping depths. When the pressure at the stamping position reaches the threshold of the pressure sensor, the corresponding upper draw sub-die and lower draw sub-die stop moving downward.

[0081] Further, the stamping apparatus for the automobile metal parts according to the present application is also suitable for stamping automobile parts such as Figure 13 The automobile part two 900 shown in FIG. 9 has a circumferentially enclosed flanging feature, and although the upper and lower limit blocks 610 and 710 are not circumferentially enclosed before the flanging operation, since the flowability of the atomized and sprayed charged lubricating oil is weak, the diffusion and waste of the lubricating oil is small, and thus no great negative problems are caused, and thus the stamping apparatus according to the present application is also suitable for stamping automobile parts such as Figure 13 The automobile part two 900 shown in FIG. 9 has a circumferentially enclosed flanging feature, and although the upper and lower limit blocks 610 and 710 are not circumferentially enclosed before the flanging operation, since the flowability of the atomized and sprayed charged lubricating oil is weak, the diffusion and waste of the lubricating oil is small, and thus no great negative problems are caused, and thus the stamping apparatus according to the present application is also suitable for stamping automobile parts such as

[0082] The technical features of the above embodiments can be combined in any manner, and for the sake of brevity, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combinations of the technical features do not contradict each other, they should be considered within the scope of the present disclosure.

[0083] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A stamping equipment for automotive metal parts, characterized in that, The utility model relates to a double-sided drawing die for drawing and flanging blank, comprising: an upper die capable of moving in a vertical direction, the upper die comprising an upper drawing die and an upper flanging die, the upper flanging die being slidingly arranged outside the upper drawing die; a lower die comprising a lower drawing die and a lower flanging die, the lower flanging die being slidingly arranged outside the lower drawing die; wherein the lower edge of the upper drawing die, the upper edge of the lower drawing die, the lower edge of the inner side of the upper flanging die and the upper edge of the inner side of the lower flanging die are all provided with a chamfer; oil injection holes for spraying lubricating oil outward, the oil injection holes being divided into two groups, the two groups of oil injection holes being arranged in the upper drawing die and the lower flanging die respectively, and the oil injection holes being directed toward the flanging position of the blank; discharge holes for discharging lubricating oil at the flanging position of the blank, the discharge holes being divided into two groups, the two groups of discharge holes being arranged in the upper flanging die and the lower drawing die respectively, and the discharge holes being directed toward the flanging position of the blank; an upper limiting assembly is arranged between the upper drawing die and the upper flanging die, the upper limiting assembly being used to limit the relative sliding distance between the upper drawing die and the upper flanging die; the upper limiting assembly comprises an upper limiting block and an upper limiting strip, the upper limiting block being elastically connected to the lower side of the upper drawing die, and the upper limiting block being capable of moving closer to or farther away from the upper drawing die in a horizontal direction, the upper limiting strip being arranged at the lower inner side of the upper flanging die, and the upper limiting block and the upper limiting strip being capable of being blocked and matched; a lower limiting assembly is arranged between the lower drawing die and the lower flanging die, the lower limiting assembly being used to limit the relative sliding distance between the lower drawing die and the lower flanging die; the lower limiting assembly comprises a lower limiting block and a lower limiting strip, the lower limiting block being elastically connected to the upper inner side of the lower flanging die, and the lower limiting block being capable of moving closer to or farther away from the lower flanging die in a horizontal direction, the lower limiting strip being arranged at the upper side of the lower drawing die, and the lower limiting block and the lower limiting strip being capable of being blocked and matched.

2. The apparatus according to claim 1, wherein The oil injection holes and the discharge holes are alternately arranged along the flanging contour line of the blank.

3. The apparatus according to claim 2, wherein The lubricating oil sprayed by the oil injection holes is in an atomized state.

4. The apparatus according to claim 3, wherein The lubricating oil has an electric charge.

5. The apparatus according to claim 4, wherein The utility model further comprises an oil injection assembly, the oil injection assembly being used to deliver the lubricating oil in an atomized state with an electric charge to the oil injection holes and spray the lubricating oil outward from the oil injection holes to the flanging position of the blank.

6. The apparatus according to claim 1, wherein The utility model further comprises a discharge assembly, the discharge assembly being used to gradually discharge the lubricating oil at the flanging position of the blank during the flanging process through the discharge holes.

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