Blanking die for simultaneously blanking multiple oil baffle plates of electric drive rear axle of automobile at one time

Abstract

The utility model relates to a blanking die for simultaneously blanking a plurality of automobile electric drive rear axle oil baffle plates at one time, which comprises a die upper structure and a die lower structure, the die upper structure comprises a die handle, an upper die plate, an upper base plate, an upper fixing plate, a guide column, a male die, discharging rubber and a guide plate. The die lower structure comprises a stop pin, a lower fixing plate, a guide sleeve, a female die, a lower base plate and a lower die plate. According to the die, the built-in guide pillar and guide sleeve structure capable of automatically correcting the die gap is adopted to ensure that the die gap is uniform, the upper die adopts the guide plate and other structures to improve the die strength and the like, so that the service life of the die is prolonged by 32 times, four blanking cutting edges on the female die are arranged in an end-to-end staggered mode, the utilization rate of plates is increased to 92% from 84%, the production cost is reduced, and the production efficiency is improved. And the product quality is stable.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of mechanical equipment, and particularly relates to a one-time simultaneous blanking multi-piece blanking die for an automobile electric drive rear axle oil baffle. BACKGROUND

[0002] The oil baffle is one of the most commonly used parts of the electric drive rear axle, which is welded on the inside of the cavity of the automobile rear axle shell body through resistance welding, and plays a role in preventing the lubricating oil in the rear axle gear from directly hitting the vent plug on the rear axle shell body (i.e., plays a buffering and blocking role), thereby preventing the lubricating oil from leaking from the vent plug of the rear axle. The production of the oil baffle is processed in four processes, and the process flow is: blanking, blanking, forming, and point pressing, to meet the design requirements of the product. Since the production batch of the oil baffle is large and the shape of the part is small, according to the current traditional blanking die design idea, only one workpiece is produced at a time, which is low in production efficiency, low in material utilization rate, and high in production cost. Moreover, the guide sleeve and guide column in the traditional stamping die are directly fixed on the upper and lower die plates, and the gap between the dies is completely controlled by the manual skills of the toolmaker, so that the manufacturing precision of the die is difficult to guarantee, thereby affecting the stability of the product quality. Moreover, the guide plate in the traditional stamping die only plays a role in unloading, and does not play a role in guiding the punch. The utility model is based on the consideration of the optimization of the existing production process and die, and therefore it is necessary to design and manufacture a die different from the original scheme (i.e., the die design automatically corrects the gap between the dies, and the guide column and guide sleeve structure are built-in, so that the uniformity of the gap between the upper and lower dies is not controlled by the manual skills of the toolmaker, but by the machining precision of the machine tool) to guarantee the product quality, and to complete the processing and manufacturing of multiple workpieces (i.e., four workpieces) at a time, thereby improving the production efficiency and reducing the production cost. CONTENT OF THE UTILITY MODEL

[0003] One of the purposes of the utility model is to provide a one-time simultaneous blanking multi-piece blanking die for an automobile electric drive rear axle oil baffle, and the die adopts an automatic automatic correction die gap built-in guide column and guide sleeve structure, and a guide plate is additionally arranged on the upper die to improve the die precision, service life and product quality. The one-time simultaneous blanking multi-piece blanking die is installed on a press machine to perform blanking processing on the oil baffle.

[0004] The second purpose of the utility model is to design a blanking die for an oil baffle, which blanks multiple products (i.e., four workpieces) at a time to replace the traditional process of blanking one workpiece at a time and the process of arranging the four blanking edges of the concave die in a head-to-head staggered arrangement to improve the utilization rate of the plate.

[0005] One of the purposes of the utility model is achieved as follows:

[0006] A die for simultaneously blanking multiple pieces of oil shields for an electric-drive rear axle of an automobile, comprising an upper die structure and a lower die structure;

[0007] The upper structure of the mold includes: mold handle, upper mold plate, upper pad, upper fixed plate, guide pillar, punch, discharge rubber and guide plate;

[0008] The lower structure of the mold includes: a stop pin, a lower fixing plate, a guide sleeve, a die, a lower pad and a lower template;

[0009] The punches are respectively installed in the punch fixed cavities of the upper fixed plate through interference fit, and are connected to the upper pad from the upper end surface through bolts. The die handle is installed in the die handle hole of the upper template through interference fit. The guide pins are installed in the guide pin holes on both sides of the upper fixed plate through interference fit. The upper template and the upper pad are connected to the upper fixed plate through bolts and positioning pins. The guide plates pass through the guide pins and punches through clearance fit, and are movably connected to the unloading rubber, the upper fixed plate, the upper pad, and the upper template through unloading bolts.

[0010] The die is installed in the die fixed cavity of the lower fixed plate through interference fit, the stop pins are respectively installed in the stop pin holes of the die through interference fit, the guide sleeves are installed in the guide sleeve holes on both sides of the lower fixed plate through interference fit, and the lower template and the lower pad are connected to the lower fixed plate.

[0011] Furthermore, the mold also includes a guide pin and a guide sleeve structure. The guide pin and the punch are fixed on the upper fixed plate, and the guide sleeve and the die are fixed on the lower fixed plate. The double-sided clearance between the guide pin and the guide sleeve is 0.07 to 0.09 mm.

[0012] Furthermore, two guide post holes are provided on both sides of the guide plate, which cooperate with the guide post clearance, and the double-sided clearance is 0.14~0.16mm. A punch guide cavity is provided in the middle of the guide plate, which cooperates with the punch clearance, and the double-sided clearance is 0.16~0.18mm.

[0013] Furthermore, the blanking cutting edge depth of the die is set to only 6.0 mm, and the slope behind the cutting edge is 1.5°.

[0014] Furthermore, the concave mold is of inlaid type and the lower fixing plate is of integral type.

[0015] Furthermore, the guide pin and the guide sleeve adopt a non-equal diameter structure, wherein the guide hole diameter of one guide sleeve is Φ19.5 mm, and the guide hole diameter of the other guide sleeve is Φ20 mm.

[0016] Furthermore, the upper fixing plate and the upper pad are both provided with four Φ42 holes for placing unloading rubbers.

[0017] Furthermore, the four blanking cutting edges on the die are arranged in a staggered manner.

[0018] Furthermore, the double-sided clearance between the punch and the die 12 is 0.14-0.16 mm, and both the punch and the die are made of Cr12MoV1 die steel with a quenching hardness of HRC57-59.

[0019] The second technical solution of the present invention is achieved as follows:

[0020] The processing technology of the blanking die for simultaneously blanking multiple pieces of oil shields for the rear axle of an electric drive vehicle includes the following steps:

[0021] Step 1: Install the blanking die for blanking multiple pieces of oil shields for electric drive rear axles of automobiles on a 63T pneumatic press;

[0022] Step 2: Place the oil baffle strip after the blanking process on top of the lower fixed plate and the die, and use the baffle pins to position the left end face and the front end face of the strip respectively;

[0023] Step 3: Start the press, and the upper template moves downward with the workbench on the machine. Under the pressure of the unloading rubber, the guide plate, the lower fixed plate, and the die first press the strip material tightly, and then as the punch continues to move downward, it completes the workpiece blanking process with the die.

[0024] Step 4: After the workpiece is blanked, the upper slide of the press drives the upper structure of the mold to return to its original position. The guide plate unloads the blanked waste under the force of the unloading rubber, and the blanked workpiece leaks out from the lower die and the lower workbench of the machine tool;

[0025] Step 5: Repeat steps 2 to 4 to make the next four workpieces.

[0026] 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 that automatically corrects the mold gap to ensure uniform mold gap, the upper mold adopts a guide plate and other structures to improve the mold strength, etc., thereby increasing the mold life by 32 times, and the four blanking cutting edges on the die are arranged in a staggered manner, the utilization rate of the plate is increased from 84% to 92%, reducing production costs and ensuring stable product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the main structure of the mold in the embodiment of the present utility model.

[0028] 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.

[0029] Figure 3 It is a schematic diagram of the die structure of the mold in the embodiment of the present utility model.

[0030] Figure 4 It is a schematic structural diagram of the oil baffle in an embodiment of the present utility model. DETAILED DESCRIPTION

[0031] 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.

[0032] Reference Figures 1 to 4 A blanking die for simultaneously blanking multiple pieces of oil deflectors for electric-driven rear axle automobiles. The die adopts a built-in guide pin and guide sleeve structure that automatically corrects the die gap, and adds guide plates and other structures to the upper die to improve die precision, life, and product quality. In addition, the multiple blanking cutting edges of the die are arranged in a staggered manner to improve the utilization rate of the plate, thereby reducing production costs.

[0033] Specifically, the mold is divided into a mold upper structure and a mold lower structure. The mold upper structure includes: a mold handle 1, an upper template 2, an upper pad 3, an upper fixing plate 4, a guide column 5, a punch 6, a discharge rubber 7 and a guide plate 8;

[0034] The lower structure of the mold includes: a stop pin 9, a lower fixing plate 10, a guide sleeve 11, a die 12, a lower pad 13 and a lower template 14. Its characteristics are as follows: four punches 6 are respectively installed in the punch fixed cavities of the upper fixed plate 4 by interference fit, and are connected to the upper pad 3 from the upper end face by bolts, the die handle 1 is installed in the die handle hole of the upper template 2 by interference fit, the guide column 5 is installed in the guide column holes on both sides of the upper fixed plate 4 by interference fit, the upper template 2 and the upper pad 3 are connected to the upper fixed plate 4 by bolts and locating pins, the guide plate 8 passes through the guide column 5 and the punch 6 respectively by clearance fit, and is movably connected to the unloading rubber 7, the upper fixed plate 4, the upper pad 3, and the upper template 2 by unloading bolts; the die 12 is installed in the die fixed cavity of the lower fixed plate 10 by interference fit, the three stop pins 9 are respectively installed in the stop pin holes of the die 12 by interference fit, the guide sleeve 11 is installed in the guide sleeve holes on both sides of the lower fixed plate 10 by interference fit, and the lower template 14 and the lower pad 13 are connected to the lower fixed plate 10 by bolts and locating pins.

[0035] The upper and lower parts of the mold are equipped with built-in guide pins and guide sleeve structures, that is, the guide pins 5 and the punch 6 are fixed on the upper fixed plate 4, and the guide sleeve 11 and the die 12 are fixed on the lower fixed plate 10. Moreover, the double-sided clearance between the guide pins 5 and the guide sleeve 11 is 0.07~0.09mm. In this way, the uniformity of the mold gap is not controlled by the manual skills of the fitter, but is guaranteed by the processing accuracy of the machine tool, thereby improving the mold accuracy.

[0036] The guide plate 8 is provided with two guide pin holes on both sides and is in clearance fit with the guide pin 5, the double-side clearance is 0.14-0.16mm, and the guide plate 8 is provided with a punch guide cavity in the middle and is in clearance fit with the punch 6, the double-side clearance is 0.16-0.18mm, so that the guide plate 8 plays a guiding role on the punch 6 to improve the strength of the punch 6, thereby improving the precision and service life of the die, and the guide plate 8 also plays the role of the ejection plate.

[0037] The blanking edge depth of the concave die 12 is only 6.0mm, and then the rear of the edge is inclined at an angle of 1.5°, so that the product can be smoothly discharged from the concave die 12, thereby preventing too much product from being left in the edge of the concave die 12, because the more product left in the edge of the concave die 12, the greater the stress on the edge of the concave die 12, so that the concave die 12 is more prone to cracking, and the product is also prone to burrs and multiple products being stuck together.

[0038] The concave die 12 is of an inlaid type, and the lower fixed plate 10 is of a whole type, so that the material cost of the concave die 12 can be saved, the die is convenient and fast to maintain, the strength of the concave die 12 is improved, thereby improving the service life of the die, and the guide sleeve 11 and the concave die 12 are both fixed in the lower fixed plate 10 through interference fit, so that when the concave die 12, which is a wear part, is replaced, the precision of the die will not be affected (because the lower fixed plate 10 and the guide sleeve 11 do not need to be replaced).

[0039] The two guide pins 5 and the guide sleeves 11 of the upper and lower dies are of a non-equal diameter structure, one of the guide sleeves 11 has a guide hole diameter of Φ19.5mm, and the other guide sleeve 11 has a guide hole diameter of Φ20mm (i.e. one large and one small, the difference in the guide hole diameter is 0.5mm), so that the stability of the die in the production process is ensured, and the die can be prevented from being placed in reverse during maintenance and assembly (i.e. when the die is placed in reverse, the guide pin of the upper die part cannot be placed into the guide sleeve hole of the lower die part).

[0040] The upper fixed plate 4 and the upper backing plate 3 are both provided with four Φ42 holes for placing the ejection rubber 7, so that the height of the punch 6 can be as low as possible, thereby improving the rigidity of the punch 6, and the ejection rubber 7 has sufficient ejection force.

[0041] The four blanking edges of the concave die 12 are arranged in a head-to-head staggered manner, so that the utilization rate of the plate material is increased from 84% to 92%, thereby reducing the production cost.

[0042] The double-side clearance between the punch 6 and the concave die 12 is 0.14-0.16mm, and the punch 6 and the concave die 12 are both made of Cr12MoV1 die steel, and the quenching hardness is HRC57-59, thereby improving the service life of the die.

[0043] The utility model will be described below in combination with a specific processing example.

[0044] The blanking die for simultaneously blanking multiple pieces of rear axle oil deflectors for the Jiangling Jingma 3.5T electric light passenger vehicle is installed on a 63T pneumatic press in the same way as a common stamping die.

[0045] This type of Jiangling Jingma 3.5T electric light passenger car rear axle oil shield is made of 1.2mm thick ST12 cold-rolled plate through stamping. After the blanking process, it can be directly used for blanking die blanking processing. Specifically:

[0046] Step 1: Install the blanking die for blanking multiple pieces of oil baffles for electric drive rear axles of automobiles on a 63T pneumatic press;

[0047] Step 2: Place the oil baffle strip after the blanking process on top of the lower fixed plate 10 and the die 12, and use the baffle pin 9 to position the left end face and the front end face of the strip respectively;

[0048] Step 3: Start the press, the upper template 2 moves downward with the workbench on the machine, the guide plate 8, under the pressure of the unloading rubber 7, presses the strip material together with the lower fixed plate 10 and the die 12, and then as the punch 6 continues to move downward, it completes the workpiece blanking process with the die 12;

[0049] Step 4: After the workpiece is blanked, the upper slide of the press drives the upper part of the mold to return to its original position. The guide plate 8 unloads the blanking waste under the force of the unloading rubber 7, and the blanked workpiece leaks out from the lower mold and the lower workbench of the machine tool;

[0050] Step 5: Repeat steps 2 to 4 to make the next four workpieces.

[0051] The Jiangling Jingma 3.5T electric light passenger vehicle rear axle oil deflector utilizes a die and processing technology that simultaneously blanks multiple pieces, increasing production efficiency by 3.7 times. The die utilizes built-in guide pins and bushings that automatically correct gaps to ensure uniform gaps. The upper die utilizes guide plates and other structures to enhance die strength, increasing die life by 32 times. The four blanking cutting edges on the die are arranged in a staggered pattern, increasing sheet material utilization from 84% to 92%, reducing production costs and ensuring consistent product quality. This ensures that the Jiangling Jingma 3.5T electric light passenger vehicle rear axle oil deflector consistently meets the design requirements of the product drawings.

[0052] 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 die for simultaneously blanking multiple pieces of oil shields for electric drive rear axles of automobiles, comprising an upper die structure and a lower die structure, characterized in that: The upper structure of the mold includes: mold handle, upper mold plate, upper pad, upper fixing plate, guide pillar, punch, discharge rubber and guide plate; The lower structure of the mold includes: a stop pin, a lower fixing plate, a guide sleeve, a die, a lower pad and a lower template; The punches are respectively installed in the punch fixed cavities of the upper fixed plate through interference fit, and are connected to the upper pad from the upper end surface through bolts. The die handle is installed in the die handle hole of the upper template through interference fit. The guide pins are installed in the guide pin holes on both sides of the upper fixed plate through interference fit. The upper template and the upper pad are connected to the upper fixed plate through bolts and positioning pins. The guide plates pass through the guide pins and punches respectively through clearance fit, and are movably connected to the unloading rubber, the upper fixed plate, the upper pad, and the upper template through unloading bolts. The die is installed in the die fixed cavity of the lower fixed plate by interference fit, the stop pins are respectively installed in the stop pin holes of the die by interference fit, the guide sleeves are installed in the guide sleeve holes on both sides of the lower fixed plate by interference fit, and the lower template and the lower pad are connected to the lower fixed plate.

2. The die for simultaneously blanking multiple pieces of oil shields for rear axles of electric-driven automobiles according to claim 1 is characterized in that: It also includes a guide post and a guide sleeve structure. The guide post and the punch are fixed on the upper fixed plate, and the guide sleeve and the die are fixed on the lower fixed plate. The double-sided clearance between the guide post and the guide sleeve is 0.07 to 0.09 mm.

3. A blanking die for blanking multiple pieces of oil shields for electric drive rear axles of automobiles according to claim 1 or 2, characterized in that: Two guide post holes are provided on both sides of the guide plate, which are clearance-matched with the guide posts, and the double-sided clearance is 0.14-0.16mm. A punch guide cavity is provided in the middle of the guide plate, which is clearance-matched with the punch, and the double-sided clearance is 0.16-0.18mm.

4. A die for simultaneously blanking multiple pieces of oil shields for electric drive rear axles of automobiles according to claim 1 or 2, characterized in that: The blanking cutting edge depth of the die is only set to 6.0 mm, and the slope behind the cutting edge is 1.5°.

5. A die for simultaneously blanking multiple pieces of oil shields for rear axles of electric-driven automobiles according to claim 1 or 2, characterized in that: The concave mold is of inlaid type, and the lower fixing plate is of integral type.

6. The die for simultaneously blanking multiple pieces of oil shields for rear axles of electric-driven automobiles according to claim 2, characterized in that: The guide pin and the guide sleeve adopt a non-equal diameter structure, wherein the guide hole diameter of one guide sleeve is Φ19.5 mm, and the guide hole diameter of the other guide sleeve is Φ20 mm.

7. A die for simultaneously blanking multiple pieces of oil shields for electric rear axles of automobiles according to claim 1 or 2, characterized in that: The upper fixing plate and the upper pad are both provided with four Φ42 holes for placing unloading rubbers.

8. A die for simultaneously blanking multiple pieces of oil shields for electric rear axles of automobiles according to claim 1 or 2, characterized in that: The four blanking cutting edges on the die are arranged in a staggered manner.

9. A die for simultaneously blanking multiple pieces of oil shields for electric drive rear axles of automobiles according to claim 1 or 2, characterized in that: The double-sided clearance between the punch and the die 12 is 0.14-0.16 mm. Both the punch and the die are made of Cr12MoV1 die steel with a quenching hardness of HRC57-59.

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