Automobile electric drive rear axle oil baffle disc left-right rapid conversion punching-trimming composite die

Abstract

The utility model discloses a left-right rapid conversion punching-trimming composite die for an oil baffle disc of an electric drive rear axle of an automobile. The die comprises a die upper structure and a die lower structure, the die upper structure comprises a die handle, an upper die plate, an upper padding plate, an upper discharging spring, a rapid conversion movable block, an upper fixing plate, a die calibrator, a left kidney-shaped hole punching male die, a right kidney-shaped hole punching male die, a trimming female die, a material beating block, a round hole punching male die and a guide column. The lower die structure comprises a lower fixing plate, a guide sleeve, a composite film, a guide plate, a left kidney-shaped hole punching female die, a right kidney-shaped hole punching female die, lower discharging rubber, a lower cushion plate and a lower die plate. The die adopts a built-in guide pillar and guide sleeve structure for automatically correcting a die gap, a die corrector is additionally arranged on an upper die part, a guide plate is additionally arranged on a lower die part, and the like, so that the precision and the strength of the die are improved, and the service life of the die is prolonged by 16 times.

Description

Technical Field

[0001] The utility model belongs to the field of mechanical equipment and specifically discloses a punching-trimming composite die for quickly switching left and right of an oil baffle plate of an electric drive rear axle of an automobile. Background Art

[0002] The oil baffle is a disc-shaped part installed in the brake hub of the electric drive rear axle of an automobile, close to the bearing oil seal. Its main function is to prevent dust and foreign matter from entering the bearing oil seal, thereby protecting the normal operation of the bearing. The left and right oil baffles are traditionally produced in five steps: blanking → forming → trimming → punching round holes. Punching the left waist hole (left oil baffle) → punching round holes, punching the right waist hole (right oil baffle) to meet product design requirements. Due to the large production batch of oil baffles and the different waist holes on the left and right oil baffles, two sets of round hole punching and waist hole punching compound dies must be designed (i.e., the left and right oil baffles must be separated). This production process has low production efficiency, high production costs, and unstable product quality (because the product needs to be positioned twice in the trimming and punching steps). Moreover, the current traditional stamping die structure is that the guide sleeve and guide column are directly fixed on the upper and lower templates, and the mold gap is completely controlled by the manual skills of the fitter. In this way, the mold manufacturing accuracy is difficult to guarantee, which affects the stability of product quality. In addition, the guide plate in the traditional stamping die only plays the role of unloading, but does not play the role of guiding the composite die. The utility model is based on the optimization considerations of the production process and the existence of the mold in the existing technology. The left and right quick conversion punching-trimming composite die of the oil baffle is designed to optimize the two processes (i.e. the trimming process and the round hole punching and waist hole punching process) into one process. It is also very necessary to realize the sharing of a pair of molds for the left and right sides of the product by moving the movable block quickly forward and backward to improve product quality and production efficiency. Utility Model Content

[0003] One of the purposes of this utility model is to provide a composite die for punching and trimming the oil deflector discs of an electric rear axle of an automobile with a quick-switch mechanism for left and right sides. The die utilizes a built-in guide post and guide sleeve structure that automatically corrects the die gap, a die calibrator and a quick-switch movable block are added to the upper die portion, and a guide plate is added to the lower die portion to improve die precision, lifespan, and product quality. Furthermore, a single die pair can be used for both left and right sides of the product. The composite die for punching and trimming the oil deflector discs is installed on a press to perform the combined punching, piercing, and trimming operations on the left and right sides of the oil deflector discs.

[0004] The second purpose of this utility model is to design a punching and trimming compound die that uses a fast-switchable oil baffle plate on the left and right sides to replace the traditional two-step composite process (i.e., trimming, round hole punching, and waist hole punching). In particular, the process uses a fast-switchable movable block that moves forward and backward to achieve a single die for both the left and right sides of the product.

[0005] One of the purposes of this utility model is achieved in this way:

[0006] A composite die for punching and trimming a fuel deflector plate of an electric rear axle of an automobile with quick left-right switching, comprising an upper die structure and a lower die structure;

[0007] The upper structure of the mold includes a mold handle, an upper mold plate, an upper pad, an upper unloading spring, a quick-change movable block, an upper fixed plate, a mold adjuster, a punch for punching the left waist hole, a punch for punching the right waist hole, a trimming die, a punching block, a punch for punching the round hole, and a guide column.

[0008] The lower structure of the mold includes a lower fixed plate, a guide sleeve, a composite film, a guide plate, a left waist hole punching die, a right waist hole punching die, a lower unloading rubber, a lower pad and a lower template;

[0009] The left waist hole punch, the right waist hole punch and the four round hole punches are respectively installed in the corresponding punch fixing holes of the proofreader through interference fit. The guide pins are installed in the guide pin holes on both sides of the trimming die through interference fit. The upper section of the proofreader is installed in the middle fixed cavity of the upper fixed plate through interference fit. The lower section of the proofreader is installed in the middle trimming edge cavity of the trimming die through interference fit and connected with the upper pad. The die handle is installed in the die handle hole of the upper template through interference fit. The quick conversion movable block is installed through the intermediate The clearance fit is directly placed in the guide groove of the upper pad. The upper template, upper pad and upper fixed plate are connected to the trimming die through bolts and locating pins. The four upper unloading springs are pre-compressed and installed in the corresponding unloading spring holes of the proofreader and the upper pad. The punching blocks are respectively passed through the left waist hole punching punch, the right waist hole punch and the round hole punch through the clearance fit and are directly placed in the middle trimming edge shaped cavity of the trimming die, and are movably connected with the upper unloading spring, proofreader, upper pad and upper template through unloading bolts.

[0010] Furthermore, the dies for punching the left waist hole and the dies for punching the right waist hole are respectively installed in the corresponding fixed cavities of the compound die through interference fit, the compound die is installed in the middle fixed cavity of the lower fixed plate through interference fit, and the guide sleeve is installed in the guide sleeve holes on both sides of the lower fixed plate through interference fit, the lower template and the lower pad are connected to the lower fixed plate through bolts and locating pins, the guide plate passes through the guide sleeve and the compound die through clearance fit, and is movably connected to the lower unloading rubber, lower fixed plate, lower pad and lower template through unloading bolts.

[0011] Furthermore, when the quick-conversion movable block is moved and its A support surface contacts the front end surface of the upper fixed plate, the upper end surface of the left waist hole punch contacts the B support surface of the quick-conversion movable block, so that the left waist hole punch maintains the height of the punching working state, and the left waist hole can be punched on the product, while the upper end surface of the right waist hole punch contacts the C yielding surface of the quick-conversion movable block, so that the right waist hole punch is lower than the normal punching working state height, and the right waist hole will not be punched on the product. In this way, the composite mold of the quick-conversion movable block in this position state can perform punching and trimming processing on the left side of the oil baffle.

[0012] Furthermore, when the quick-conversion movable block is moved and its E support surface contacts the rear end surface of the upper fixed plate, the upper end surface of the right waist hole punch contacts the D support surface of the quick-conversion movable block, so that the right waist hole punch maintains the height of the punching working state, and the right waist hole can be punched on the product, while the upper end surface of the left waist hole punch contacts the C yielding surface of the quick-conversion movable block, so that the left waist hole punch is lower than the normal punching working state height, and the left waist hole will not be punched on the product. The composite die of the quick-conversion movable block in this position state can perform punching and trimming processing on the right of the oil baffle plate.

[0013] Furthermore, by moving the quick-conversion movable block forward and backward, the same composite mold can be used to perform punching-trimming composite processing on the left and right sides of the oil baffle plate, and the support surface and the yield surface on the quick-conversion movable block are set to a 30-degree inclined plane transition, which can ensure that the left waist hole punch and the right waist hole punch can move up and down smoothly without being stuck by the steps as the quick-conversion movable block moves forward and backward. The supporting surfaces on both sides of the quick-conversion movable block are provided with screw holes fixed to the front and rear end surfaces of the upper fixed plate, which can prevent the quick-conversion movable block from moving forward and backward in the guide groove of the upper pad during the operation of the mold, thereby scrapping the product.

[0014] Furthermore, two guide sleeve holes are provided on both sides of the guide plate, and the guide sleeve holes and the guide sleeve clearance are matched, and the double-sided clearance is 0.16~0.18mm. A guide cavity is provided in the middle of the guide plate, and the guide cavity and the composite mold clearance are matched, and the double-sided clearance is 0.10~0.12mm.

[0015] Furthermore, both the left waist hole punching die and the right waist hole punching die are mosaic structures and are fixed in the composite die.

[0016] Furthermore, the lower fixing plate is a stepped structure, so that the fixing height of the composite mold is as high as possible.

[0017] Furthermore, the lower fixing plate and the lower pad are both provided with four Φ42 holes for placing the lower unloading rubber.

[0018] The second technical solution of the present invention is achieved as follows:

[0019] A processing technology for a punching-trimming composite die for rapid left-right switching of an oil baffle plate of an electric drive rear axle of an automobile comprises the following steps:

[0020] Step 1: Install the left and right quick-change punching-trimming composite dies for the electric drive rear axle oil deflector of the automobile on a 100T pneumatic press;

[0021] Step 2: Move the quick-change movable block of the upper die part so that its A support surface contacts the front end surface of the upper fixed plate, and fix it to the upper fixed plate from the side with bolts. At this time, the upper end surface of the punch for punching the left waist hole contacts the support surface B of the quick-change movable block. Then use the auxiliary workpiece to move the punch for punching the right waist hole upward until its upper end surface contacts the C clearance surface of the quick-change movable block. The compound die of the quick-change movable block in this position state can punch and trim the left side of the oil baffle plate.

[0022] Step 3: Place the prefabricated oil baffle workpiece after the blanking and forming process in the middle positioning cavity of the composite mold, and use the product slope to prevent rotation;

[0023] Step 4: Start the press, and the upper template moves downward along with the worktable on the machine. The punching block and the compound die first press the inner cavity of the workpiece under the pressure of the upper unloading spring, while the guide plate and the trimming die first press the outer edge of the workpiece under the pressure of the lower unloading rubber. Then, as the left waist hole punching punch, the trimming die, and the round hole punch continue to move downward, the compound die and the left waist hole punching die complete the workpiece left waist hole punching, trimming, and round hole punching processes.

[0024] Step 5: After the workpiece is punched with the left waist hole, trimmed, and punched with round holes, the upper slide of the press drives the upper half of the mold to return to its original position. Then, the punching block unloads the workpiece under the action of the upper unloading spring, and the guide plate unloads the trimming waste under the action of the lower unloading rubber. The waste from punching the round hole and the waist hole leaks out from the lower die and the lower workbench of the machine tool. Then, auxiliary tools are used to remove the workpiece and trimming waste.

[0025] Step 6: Repeat steps 3 to 5 to make the next workpiece until all the left workpieces of the oil baffle plate to be processed are completed;

[0026] Step 7: Remove the connecting bolts between the quick-conversion movable block and the front end face of the upper fixed plate in step 2, move the quick-conversion movable block of the upper die part so that its E support surface contacts the rear end face of the upper fixed plate, and fix it to the upper fixed plate from the side with bolts. At this time, the upper end face of the right waist hole punch contacts the D support surface of the quick-conversion movable block, and then use the auxiliary workpiece to move the left waist hole punch upward until its upper end face contacts the C yielding surface of the quick-conversion movable block. The composite die of the quick-conversion movable block in this position state can punch and trim the right side of the oil baffle plate.

[0027] Step 8: Repeat steps 3 to 5 to make the right workpiece of the oil baffle.

[0028] The beneficial effects of the utility model are as follows: the mold of the utility model adopts a built-in guide pin and guide sleeve structure which automatically corrects the mold gap, the upper mold part is additionally provided with a mold proofreader, the lower mold part is additionally provided with a guide plate and other structures to improve the mold precision and strength, thereby increasing the mold life by 16 times, and the upper mold part is additionally provided with a quick conversion movable block so that the left and right products can share a pair of molds, saving the mold development cost of a set of processes, and optimizing the traditional two processes (i.e. trimming, punching round holes and punching waist holes) into one process, thereby increasing the production efficiency by 1.1 times and achieving stable product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the main structure of an embodiment of the present utility model.

[0030] Figure 2 It is a schematic diagram of the top view of the lower structure of the mold in an embodiment of the present utility model.

[0031] Figure 3 It is a schematic diagram of the structure of the quick-conversion movable block of the mold in the embodiment of the utility model.

[0032] Figure 4 It is a schematic diagram of the left and right structures of the oil baffle in the embodiment of the present utility model. DETAILED DESCRIPTION

[0033] The present invention can be specifically implemented through technical solutions, and the present invention can be further described through the following embodiments. However, the scope of the present invention is not limited to the following embodiments.

[0034] Reference Figures 1 to 4 A composite die for punching and trimming a fuel deflector plate of an electric rear axle of an automobile with quick left-right switching, comprising an upper die structure and a lower die structure;

[0035] Among them, the upper structure of the mold includes a mold handle 1, an upper template 2, an upper pad 3, an upper unloading spring 4, a quick-conversion movable block 5, an upper fixed plate 6, a mold corrector 7, a left waist hole punch 8, a right waist hole punch 9, a trimming die 10, a punching block 11, a round hole punch 12 and a guide column 13. The lower half of the mold includes: a lower fixed plate 14, a guide sleeve 15, a composite film 16, a guide plate 17, a left waist hole punch 18, a right waist hole punch 19, a lower unloading rubber 20, a lower pad 21 and a lower template 22. Its characteristics are as follows: the punch 8 for punching the left waist hole, the punch 9 for punching the right waist hole and the four punch dies 12 for punching the round hole are respectively installed in the corresponding punch fixing holes of the proofreader 7 through interference fit, the guide pins 13 are installed in the guide pin holes on both sides of the trimming die 10 through interference fit, the upper section of the proofreader 7 is installed in the middle fixed cavity of the upper fixed plate 6 through interference fit, and the lower section of the proofreader 7 is installed in the middle trimming edge cavity of the trimming die 10 through interference fit (i.e., the trimming edge is kept in the middle of the trimming die). The upper plate 2 is connected to the upper plate 3 by bolts, and the upper plate 3 is connected to the upper plate 2 by an interference fit. The quick-change movable block 5 is directly placed in the guide groove of the upper plate 3 by a clearance fit. The upper plate 2, the upper plate 3, and the upper fixed plate 6 are connected to the trimming die 10 by bolts and positioning pins. The four upper unloading springs 4 are pre-compressed and installed on the corresponding unloading springs of the proofreader 7 and the upper plate 3. In the spring hole, the punching blocks 11 are respectively passed through the left waist hole punching punch 8, the right waist hole punching punch 9 and the round hole punch 12 through clearance fit and are directly placed in the middle trimming edge cavity of the trimming die 10, and are movably connected with the upper unloading spring 4, the mold proofreader 7, the upper pad 3 and the upper template 2 through unloading bolts; the left waist hole punching die 18 and the right waist hole punching die 19 are respectively installed in the corresponding die fixed cavities of the compound die 16 through interference fit, the compound die 16 is installed in the middle fixed cavity of the lower fixed plate 14 through interference fit, and the guide sleeve 15 is installed in the guide sleeve holes on both sides of the lower fixed plate 14 through interference fit, the lower template 22 and the lower pad 21 are connected to the lower fixed plate 14 through bolts and locating pins, the guide plate 17 passes through the guide sleeve 15 and the compound die 16 through clearance fit, and is movably connected with the lower unloading rubber 20, the lower fixed plate 14, the lower pad 21 and the lower template 22 through unloading bolts.

[0036] The upper die part is provided with a quick-conversion movable block 5. When the quick-conversion movable block 5 is moved and its A support surface contacts the front end surface of the upper fixed plate 6, the upper end surface of the left waist hole punch 8 contacts the B support surface of the quick-conversion movable block 5, so that the left waist hole punch 8 maintains the height of the punching working state, and the left waist hole can be punched on the product, and the upper end surface of the right waist hole punch 9 contacts the C yield surface of the quick-conversion movable block 5, so that the right waist hole punch 9 is lower than the normal punching working state height (that is, 6mm shorter, because the yield surface on the quick-conversion movable block 5 is 6mm lower than the support surface), and the right waist hole will not be punched on the product (because the right waist hole punch and concave die edges cannot touch each other and will not work). In this way, the composite die of the quick-conversion movable block 5 in this position state can punch the left side of the oil baffle. Punching-trimming processing; when the quick-conversion movable block 5 is moved and its E support surface contacts the rear end surface of the upper fixed plate 6, the upper end surface of the right waist hole punch 9 contacts the D support surface of the quick-conversion movable block 5, so that the right waist hole punch 9 maintains the height of the punching working state, and the right waist hole can be punched on the product, and the upper end surface of the left waist hole punch 8 contacts the C yield surface of the quick-conversion movable block 5, so that the left waist hole punch 8 is lower than the normal punching working state height (that is, 6mm shorter, because the yield surface on the quick-conversion movable block 5 is 6mm lower than the support surface), and the left waist hole will not be punched on the product (because the left waist hole punch and concave die edges cannot touch each other at all and will not work). In this way, the composite die of the quick-conversion movable block 5 in this position state can punch and trim the right of the oil baffle plate. Therefore, as long as the quick-conversion movable block 5 is moved forward and backward, the same composite mold can be used to perform punching-trimming composite processing on the left and right sides of the oil baffle plate (because the left and right sides of the oil baffle plate are only different in the position of the waist holes, which are symmetrical about the center, and everything else is the same). The supporting surface and the yielding surface on the quick-conversion movable block 5 are set to a 30-degree inclined plane transition, which can ensure that the left waist hole punch 8 and the right waist hole punch 9 move up and down smoothly as the quick-conversion movable block 5 moves forward and backward without being stuck by the steps. The supporting surfaces on both sides of the quick-conversion movable block 5 are provided with screw holes fixed to the front and rear end surfaces of the upper fixed plate 6, which can prevent the quick-conversion movable block 5 from moving forward and backward in the guide groove of the upper pad 3 during the operation of the mold, thereby scrapping the product.

[0037] The upper and lower parts of the mold are provided with built-in guide pin and guide sleeve structures, and the upper part of the mold is also provided with a proofreader 7, that is, the guide pin 13 is fixed on the trimming die 10, the guide sleeve 15 and the compound die 16 are both fixed on the lower fixed plate 14, and the double-sided clearance between the guide pin 13 and the guide sleeve 15 is 0.08~0.10mm, the left waist hole punch 8, the right waist hole punch 9 and the round hole punch 12 are all fixed on the proofreader 7, the upper section of the proofreader 7 is fixed on the upper fixed plate 6, and the lower section of the proofreader 7 (that is, the fixed height is 8mm) is fixed in the middle trimming edge cavity of the trimming die 10, so that the uniformity of the mold gap and the position of each hole are not controlled by the manual skills of the fitter, but are guaranteed by the processing accuracy of the machine tool, thereby improving the mold accuracy.

[0038] Two guide sleeve holes are provided on both sides of the guide plate 17 to match the clearance of the guide sleeve 15, and the double-sided clearance is 0.16~0.18mm. A guide cavity is provided in the middle of the guide plate 17 to match the clearance of the compound mold 16, and the double-sided clearance is 0.10~0.12mm. In this way, the guide plate 17 not only guides the compound mold 16 to improve the strength of the compound mold 16, thereby improving the life and precision of the mold (because the wall thickness of the thinnest edge of the compound mold 16 is only 4.1mm, if the guide plate 17 is not added, the compound mold 16 will often crack at the thinnest edge), but also the guide plate 17 also serves as a discharge plate.

[0039] The left waist hole die 18 and the right waist hole die 19 are both inlaid structures and fixed in the composite die 16, so that the mold maintenance is convenient and quick (if they are integrated together in the composite die 16, the waist hole die of the mold is difficult to repair).

[0040] The lower fixing plate 14 is a stepped structure, so that the fixing height of the composite mold 16 is as high as possible, which can improve the strength of the composite mold 16 and thus increase the life of the mold.

[0041] The lower fixed plate 14 and the lower pad 21 are provided with four Φ42 holes for placing the lower discharge rubber 20. This can not only reduce the height of the composite mold 16 as much as possible, thereby improving the strength of the composite mold 16, but also provide the lower discharge rubber 20 with sufficient discharge force, and also reduce the closed height of the mold so that the mold can be installed on a 100T press.

[0042] This embodiment will be described below in conjunction with the working steps of the mold.

[0043] The left and right quick-change punching and trimming composite dies for the rear axle oil deflector of the Jiangling Jinhu EV electric light truck are installed on a 100T pneumatic press in the same way as ordinary stamping dies.

[0044] The left and right rear axle oil deflectors of the Jiangling Jinhu EV electric light truck are made of 1.5mm thick ST14 cold-rolled sheet through stamping. After the blanking, blanking and forming processes, they can be directly used for the punching and trimming composite processing of the composite die:

[0045] Step 1: Install the left and right quick-change punching-trimming composite dies for the electric drive rear axle oil deflector of the automobile on a 100T pneumatic press;

[0046] The second step is to move the quick conversion movable block 5 of the upper die part so that its A leaning surface contacts the front end surface of the upper fixed plate 6, and fix it to the upper fixed plate 6 from the side by bolts (that is, to prevent the quick conversion movable block 5 from moving forward and backward in the guide groove of the upper pad 3 during the working process of the die). At this time, the upper end surface of the left waist hole punch 8 contacts the B support surface of the quick conversion movable block 5 (that is, the left waist hole punch 8 maintains the height of the punching working state, and the left waist hole can be punched on the product). Then, the auxiliary workpiece is used to move the right waist hole punch 9 upward until its upper end surface contacts the C giving surface of the quick conversion movable block 5 (that is, the right waist hole punch 9 is lower than the normal punching working state height, and the right waist hole punch 9 and the right waist hole die 19 cutting edge do not contact at all when the die is working, so the right waist hole will not be punched on the product). In this way, the composite die of the quick conversion movable block 5 in this position state can punch and trim the left side of the oil baffle plate.

[0047] Step 3: The prefabricated oil baffle after blanking and forming process (i.e. the product is formed regardless of left or right direction)

[0048] The workpiece is placed in the middle positioning cavity of the composite die 16 and is prevented from rotating by the product bevel;

[0049] Step 4: Start the press, the upper template 2 moves downward with the worktable on the machine bed, the punching block 11 is pressed against the inner cavity of the workpiece with the compound die 16 under the pressure of the upper discharge spring 4, and the guide plate 17 is pressed against the outer edge of the workpiece with the trimming die 10 under the pressure of the lower discharge rubber 20, and then the left waist hole punch 8, the trimming die 10, and the round hole punch 12 continue to move downward with the compound die 16 and the left waist hole punch 18 to complete the workpiece punching, trimming, and round hole punching processes (i.e., the left side of the oil baffle plate);

[0050] Step 5: After the workpiece is punched with the left waist hole, trimmed, and punched with the round hole, the upper slide of the press drives the upper half of the mold to return to its original position, and then the punching block 11 unloads the workpiece under the force of the upper unloading spring 4, and the guide plate 17 unloads the trimming waste under the force of the lower unloading rubber 20, while the waste from punching the round hole and the waist hole leaks out from the lower die and the lower workbench of the machine tool, and then the workpiece and trimming waste are taken out with auxiliary tools;

[0051] Step 6: Repeat steps 3 to 5 to make the next workpiece until all the left parts of the oil baffle plate to be processed are completed;

[0052] Step 7: Remove the connecting bolts of the quick-conversion movable block 5 and the front end face of the upper fixed plate 6 in step 2, move the quick-conversion movable block 5 of the upper mold part so that its E-supporting surface contacts the rear end face of the upper fixed plate 6, and fix it to the upper fixed plate 6 from the side through bolts (that is, prevent the quick-conversion movable block 5 from moving forward and backward in the guide groove of the upper pad 3 during the working process of the mold). At this time, the upper end face of the right waist hole punch 9 contacts the D support surface of the quick-conversion movable block 5 (that is, the right waist hole punch 9 keeps the punching hole The height of the working state can punch the right waist hole of the product), and then use the auxiliary workpiece to move the left waist hole punch 8 upward until its upper end surface contacts the C-dispensing surface of the quick-conversion movable block 5 (that is, the left waist hole punch 8 is lower than the normal punching working state height, and the left waist hole punch 8 and the left waist hole punching die 18 cutting edge cannot contact at all when the mold is working, and the left waist hole cannot be punched on the product). In this way, the composite mold with the quick-conversion movable block 5 in this position state can punch and trim the right side of the oil baffle plate;

[0053] Step 8: Repeat steps 3 to 5 to make the right workpiece of the oil baffle.

[0054] The Jiangling Jinhu EV electric light truck rear axle oil deflector's left and right sides are produced using a quick-change punching and trimming composite die and its processing technology. Punching holes, waist holes, trimming, and other related dimensions are all within tolerance. The traditional two-step process (i.e., trimming, punching holes, and waist holes) has been optimized into a single step, increasing production efficiency by 1.1 times. The die utilizes built-in guide pins and bushings that automatically correct die gaps. A die calibrator has been added to the upper die, and guide plates have been added to the lower die to improve die precision and strength, thereby increasing die life by 16 times. A quick-change movable block has been added to the upper die, allowing the left and right sides of the product to share a single die, saving the mold development costs of a single set of steps. This ensures consistent product quality and reduces production costs, ensuring that the Jiangling Jinhu EV electric light truck rear axle oil deflector's left and right sides meet the design requirements of the product drawings.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A composite die for punching and trimming a fuel deflector plate of an electric rear axle of an automobile with quick left and right switching, comprising an upper die structure and a lower die structure; in, The upper structure of the mold includes a mold handle, an upper mold plate, an upper pad, an upper unloading spring, a quick-changing movable block, an upper fixed plate, a mold adjuster, a punch for punching a left waist hole, a punch for punching a right waist hole, a trimming die, a punching block, a punch for punching a round hole, and a guide column. The lower structure of the mold includes a lower fixed plate, a guide sleeve, a composite film, a guide plate, a left waist hole punching die, a right waist hole punching die, a lower unloading rubber, a lower pad and a lower template; It is characterized in that the punch for punching the left waist hole, the punch for punching the right waist hole and the four punches for punching the round holes are respectively installed in the corresponding punch fixing holes of the proofreader through interference fit, the guide pillars are installed in the guide pillar holes on both sides of the trimming die through interference fit, the upper section of the proofreader is installed in the middle fixed cavity of the upper fixed plate through interference fit, the lower section of the proofreader is installed in the middle trimming edge cavity of the trimming die through interference fit, and are connected to the upper pad, the die handle is installed in the die handle hole of the upper template through interference fit, and the quick turn The movable block is directly placed in the guide groove of the upper pad through clearance fit. The upper template, upper pad and upper fixed plate are connected to the trimming die through bolts and locating pins. The four upper unloading springs are pre-compressed and installed in the corresponding unloading spring holes of the proofreader and the upper pad. The punching blocks are respectively passed through the left waist hole punching punch, the right waist hole punch and the round hole punch through clearance fit and are directly placed in the middle trimming edge shaped cavity of the trimming die, and are movably connected to the upper unloading spring, proofreader, upper pad and upper template through unloading bolts.

2. The composite die for punching and trimming a fuel deflector plate of an electric rear axle of an automobile with quick left and right switching according to claim 1, characterized in that: The left waist hole punching die and the right waist hole punching die are respectively installed in the corresponding die fixed cavities of the compound die through interference fit, the compound die is installed in the middle fixed cavity of the lower fixed plate through interference fit, and the guide sleeve is installed in the guide sleeve holes on both sides of the lower fixed plate through interference fit, the lower template and the lower pad are connected to the lower fixed plate through bolts and locating pins, the guide plate passes through the guide sleeve and the compound die respectively through clearance fit, and is movably connected to the lower unloading rubber, lower fixed plate, lower pad and lower template through unloading bolts.

3. The composite die for punching and trimming a fuel deflector plate of an electric rear axle of an automobile with quick left and right switching according to claim 1, characterized in that: When the quick-conversion movable block is moved and its A support surface contacts the front end surface of the upper fixed plate, the upper end surface of the left waist hole punch contacts the B support surface of the quick-conversion movable block, so that the left waist hole punch maintains the height of the punching working state, and the left waist hole can be punched on the product, while the upper end surface of the right waist hole punch contacts the C yielding surface of the quick-conversion movable block, so that the right waist hole punch is lower than the normal punching working state height, and the right waist hole will not be punched on the product. In this way, the composite die of the quick-conversion movable block in this position state can perform punching and trimming processing on the left of the oil baffle plate.

4. The composite die for punching and trimming a fuel deflector plate of an electric rear axle of an automobile with rapid left-right switching according to claim 3, characterized in that: When the quick-conversion movable block is moved and its E support surface contacts the rear end surface of the upper fixed plate, the upper end surface of the right waist hole punch contacts the D support surface of the quick-conversion movable block, so that the right waist hole punch maintains the height of the punching working state, and the right waist hole can be punched on the product, while the upper end surface of the left waist hole punch contacts the C yielding surface of the quick-conversion movable block, so that the left waist hole punch is lower than the normal punching working state height, and the left waist hole will not be punched on the product. The composite die of the quick-conversion movable block in this position can perform punching and trimming processing on the right of the oil baffle plate.

5. The composite die for punching and trimming of the oil baffle plate of the electric drive rear axle of an automobile with rapid left-right switching according to claim 3, characterized in that: By moving the quick-conversion movable block forward and backward, the same composite mold can be used to perform punching-trimming composite processing on the left and right sides of the oil baffle. The support surface and the yield surface on the quick-conversion movable block are set to a 30-degree inclined transition, which can ensure that the left waist hole punching punch and the right waist hole punch can move up and down smoothly without being stuck by the steps as the quick-conversion movable block moves forward and backward. The supporting surfaces on both sides of the quick-conversion movable block are provided with screw holes fixed to the front and rear end surfaces of the upper fixed plate, which can prevent the quick-conversion movable block from moving forward and backward in the guide groove of the upper pad during the operation of the mold, thereby scrapping the product.

6. A composite die for punching and trimming a fuel deflector plate for an electric rear axle of an automobile with rapid left-right switching according to claim 1 or 2, characterized in that: Two guide sleeve holes are provided on both sides of the guide plate, and the guide sleeve holes and the guide sleeve clearance are matched, and the double-side clearance is 0.16-0.18mm. A guide cavity is provided in the middle of the guide plate, and the guide cavity and the composite mold clearance are matched, and the double-side clearance is 0.10-0.12mm.

7. A composite die for punching and trimming a fuel deflector plate for an electric rear axle of an automobile with rapid left-right switching according to claim 1 or 2, characterized in that: The left waist hole punching die and the right waist hole punching die are both inlaid structures and are fixed in the composite die.

8. A composite die for punching and trimming a fuel deflector plate for an electric rear axle of an automobile with rapid left-right switching according to claim 1 or 2, characterized in that: The lower fixing plate is a stepped structure, so that the fixing height of the composite mold is as high as possible.

9. A composite die for punching and trimming a fuel deflector plate for an electric rear axle of an automobile with rapid left-right switching according to claim 1 or 2, characterized in that: The lower fixing plate and the lower pad are both provided with four Φ42 holes for placing the lower discharge rubber.

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