Bending die for bending two automobile electric drive rear axle stabilizer bar supporting frame at one time and machining technology of bending die for bending two automobile electric drive rear axle stabilizer bar supporting frame at one time

Abstract

The invention discloses an automobile electric drive rear axle stabilizer bar supporting frame one-time bending two-piece bending die and a machining technology thereof. The upper half portion of the die comprises a die handle, an upper die plate, an upper cushion plate, a discharging spring, an upper fixing plate, a guide sleeve, a bending upper die and a knockout rod. And the lower half part of the die comprises a mistake-proof pin, a lower fixing plate, a bending lower die, an ejector plate, a positioning pin, a lower base plate, a guide column, a lower die plate and an ejector rod. According to the die, the boss and the groove capable of automatically correcting the gap of the die are adopted, and two pieces are bent at a time to enable the die to be stressed in a balanced mode, so that the production efficiency is improved by 79%, the service life of the die is prolonged by 2.8 times, and a shaping process and shaping die cost which are additionally added due to the fact that the height difference of the two sides is out of tolerance after a traditional bending die is bent are saved; and the product quality is stable.

Description

Technical Field

[0001] The invention belongs to the field of mechanical equipment, and relates to a manufacturing die for a stabilizer bar support frame, and in particular to a bending die for bending two pieces of a stabilizer bar support frame for an electric drive rear axle of an automobile at one time, and a processing technology thereof. Background Art

[0002] The electric drive rear axle stabilizer bar support frame is welded on the body of the automobile drive axle bridge housing. Its main function is to fasten and install the automobile stabilizer bar and control the installation position of the stabilizer bar. It is used to resist the lateral force generated when the vehicle turns and limit the roll angle of the vehicle body, thereby improving the stability of the vehicle. Therefore, the difference in the bending height of the two sides of the stabilizer bar support frame after bending is required to be controlled within 1.0mm. According to the current traditional bending die design concept, the mold gap is completely controlled by the manual skills of the fitter, so the mold manufacturing accuracy is difficult to guarantee. Since the product bending surface has an inclination (i.e., the upper part is larger and the lower part is smaller), if a single piece is bent according to the traditional bending die design concept, the mold will be subjected to unilateral force, so the gap between the upper and lower molds of the mold is easy to move during the production process, and the difference in the bending height of the two sides of the product is difficult to meet the quality requirements, so an additional shaping process is required. Therefore, it is necessary to find a new way to design and produce a set of molds that are different from the original plan (that is, the mold is designed with a convex and concave platform that automatically corrects the bending gap, and the uniformity of the gap between the upper and lower molds is not controlled by the manual skills of the fitter, but by the processing accuracy of the machine tool. This not only ensures the uniformity of the mold gap, but also plays a guiding role in the mold production process), and design the mold to bend two pieces at a time to prevent the uniformity of the mold bending gap from being affected by the unilateral force on the mold, thereby ensuring the consistency and stability of product quality. Summary of the invention

[0003] One of the purposes of the present invention is to provide a bending die for bending two pieces of a stabilizer bar support frame of an electric drive rear axle of an automobile, and the die adopts a boss and a groove for automatically correcting the gap between the die, and a structure such as bending two pieces at a time to balance the force of the die to improve the die precision, life and product quality. The bending die for bending two pieces at a time is installed on a press to bend the stabilizer bar support frame.

[0004] The second purpose of the present invention is to design a bending mold using a stabilizer bar support frame to produce two pieces at a time, thereby replacing the traditional process of bending only one product at a time.

[0005] One of the purposes of the present invention is achieved in that: A two-piece bending die for bending a stabilizer bar support frame of an electric drive rear axle of an automobile at one time, which is divided into an upper part of the die and a lower part of the die. The upper part of the die includes: a die handle, an upper die plate, an upper pad, a discharge spring, an upper fixing plate, a guide sleeve, a bending upper die and a punching rod; The lower part of the mold includes: anti-error pin, lower fixing plate, bending lower mold, ejector plate, positioning pin, lower pad, guide column, lower template and ejector pin; The bending upper die is installed in the fixed cavity of the upper fixed plate through interference fit, and is 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 die through interference fit. The guide sleeve is installed in the guide sleeve holes on both sides of the upper die through interference fit. Four punching rods are directly placed in the corresponding punching rod holes of the bending upper die through clearance fit. Four unloading springs are pre-compressed and installed in the corresponding unloading spring holes of the bending upper die and the upper pad. The upper die plate and the upper pad are connected to the upper fixed plate through bolts and positioning pins. Two bending lower dies are installed on the left and right sides of the fixed cavity of the lower fixed plate through interference fit, and are connected to the lower fixed plate from the side by bolts respectively. Two anti-error pins are installed in the anti-error pin holes of the right bending lower die through interference fit. The guide pillars are installed in the guide pillar holes on both sides of the lower template through interference fit. The lower template and the lower pad are connected to the lower fixed plate through bolts and locating pins. Three ejector rods are directly placed in the corresponding ejector rod holes of the lower pad and the lower template through clearance fit. Four locating pins are respectively installed in the locating pin holes of the ejector plate through interference fit. The assembly of the ejector plate and the locating pins is directly placed in the ejector plate cavity composed of the lower fixed plate and the bending lower die through clearance fit.

[0006] Furthermore, a boss for automatically correcting the mold gap is provided at each end of the bending upper mold, and a groove for automatically correcting the mold gap is provided at the upper and lower parts of the lower fixed plate, and the double-sided clearance between the automatic mold gap correction boss of the bending upper mold and the automatic mold gap correction groove of the lower fixed plate is 0.10 to 0.12 mm.

[0007] Furthermore, the lower bending die is of an inlaid type, the lower fixing plate is of an integral type, and the lower bending die is fixed in the cavity of the lower fixing plate by interference fit.

[0008] Furthermore, a boss is provided at each of the upper and lower ends of the ejector plate, and the double-sided clearance between the ejector plate and the middle automatic mold clearance groove is 0.15 to 0.17 mm.

[0009] Furthermore, the outer corner of the bending lower die is designed to have a slope of 30°, and arc transitions are used on both sides.

[0010] Furthermore, the mold bends two products at a time, ensuring balanced force on both sides of the mold and reducing the change in the gap between the two sides of the mold.

[0011] Furthermore, two anti-error pins are provided on the right bending lower die.

[0012] Furthermore, four ejector rods and unloading springs are added to the upper part of the mold to eject the material and prevent the product from sticking to the mold.

[0013] The second object of the present invention is achieved in this way: A processing technology for bending two bending dies at one time using the automotive electric drive rear axle stabilizer bar support frame of claim 1, comprising the following steps: Step 1: Install the bending die of the automotive electric drive rear axle stabilizer bar support frame, which is bent two pieces at a time, on a 160T press with a lower ejector cylinder; Step 2: Place the two prefabricated stabilizer bar support frames after the blanking, blanking and punching processes on the upper surface of the top plate, and use positioning pins to fix the two inner holes of the products, and use anti-misplacement pins to prevent misplacement; Step 3: Start the press, the upper die plate moves downward along with the worktable on the machine bed, the upper bending die and the ejector plate first press the product under the force of the lower ejector cylinder, and then continue to move downward with the upper bending die until the lower surface of the ejector plate contacts the upper surface of the lower pad, and the upper bending die, the lower bending die and the ejector plate complete the bending process of the workpiece; Step 4: After the workpiece is bent, the upper slide of the press drives the upper part of the mold to return to its original position. The punch rod unloads the product under the force of the unloading spring and leaves the product in the lower mold. The ejector rod ejects the ejector plate under the force of the ejector cylinder under the machine tool. The ejector plate ejects the product, and then the workpiece is taken out with auxiliary tools and placed in the material box. Step 5: Repeat steps 2 to 4 to make the next two products.

[0014] The beneficial effects of the present invention are as follows: the mold of the present invention adopts bosses and grooves for automatically correcting the mold gap, and bends two pieces at a time to balance the force on the mold, thereby improving production efficiency by 79%, increasing the mold life by 2.8 times, and saving the need for an additional shaping process and shaping mold costs due to the height difference between the two sides after bending with a traditional bending mold, and the product quality is stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the main structure of the mold in an embodiment of the present invention.

[0016] Figure 2 It is a schematic diagram of the top structure of the lower mold part in an embodiment of the present invention.

[0017] Figure 3 Schematic diagram of the curved upper mold structure of the mold in an embodiment of the present invention.

[0018] Figure 4 Schematic diagram of the bent lower die structure of the mold in an embodiment of the present invention.

[0019] Figure 5 Schematic diagram of the structure of the stabilizer bar support frame in an embodiment of the present invention. DETAILED DESCRIPTION

[0020] The present invention can be specifically implemented through technical solutions, and the present invention can be further described through the following embodiments, but the scope of the present invention is not limited to the following embodiments.

[0021] Reference Figures 1 to 5 A two-piece bending mold for bending a stabilizer bar support frame of an electric drive rear axle of an automobile at one time is divided into an upper part of the mold and a lower part of the mold. The upper part of the mold includes: a mold handle 1, an upper mold plate 2, an upper pad 3, a discharge spring 4, an upper fixed plate 5, a guide sleeve 6, a bending upper mold 7 and a knockout rod 8. The lower part of the mold includes: an anti-error pin 9, a lower fixed plate 10, a bending lower mold 11, a ejector plate 12, a positioning pin 13, a lower pad 14, a guide column 15, a lower mold plate 16 and an ejector rod 17.

[0022] The bending upper die 7 is installed in the fixed cavity of the upper fixed plate 5 through interference fit, and is connected to the upper pad 3 from the upper end face through bolts. The die handle 1 is installed in the die handle hole of the upper die plate 2 through interference fit. The guide sleeve 6 is installed in the guide sleeve holes on both sides of the upper die plate 2 through interference fit. Four punching rods 8 are directly placed in the corresponding punching rod holes of the bending upper die 7 through clearance fit. Four unloading springs 4 are pre-compressed and installed in the corresponding unloading spring holes of the bending upper die 7 and the upper pad 3. The upper die plate 2 and the upper pad 3 are connected to the upper fixed plate 5 through bolts and positioning pins; two bending lower dies 11 are installed on the left and right sides of the fixed cavity of the lower fixed plate 10 through interference fit, and are respectively The edge is connected to the lower fixed plate 10 by bolts, the two anti-error pins 9 are installed in the anti-error pin holes of the right bending lower mold 11 by interference fit, the guide column 15 is installed in the guide column holes on both sides of the lower template 16 by interference fit, the lower template 16 and the lower pad 14 are connected to the lower fixed plate 10 by bolts and locating pins, the three ejector rods 17 are directly placed in the corresponding ejector rod holes of the lower pad 14 and the lower template 16 by clearance fit, the four locating pins 13 are respectively installed in the locating pin holes of the ejector plate 12 by interference fit, and the assembly of the ejector plate 12 and the locating pins 13 is directly placed in the ejector plate-shaped cavity composed of the lower fixed plate 10 and the bending lower mold 11 by clearance fit.

[0023] The curved upper die 7 of the upper die part has a boss at each end for automatically correcting the die gap, and the lower fixed plate 10 of the lower die part has a groove on the upper and lower sides for automatically correcting the die gap, and the double-sided clearance between the boss for automatically correcting the die gap of the curved upper die 7 and the groove for automatically correcting the die gap of the lower fixed plate 10 is 0.10 to 0.12 mm. In this way, the uniformity of the gap between the upper and lower dies is not controlled by the manual skills of the fitter, but is guaranteed by the machining accuracy of the machine tool, thereby improving the manufacturing accuracy and life of the die.

[0024] The bending lower die 11 is of an inlaid type, the lower fixed plate 10 is of an integral type, and the bending lower die 11 is fixed in the shape cavity of the lower fixed plate 10 by interference fit, which can save the material cost of the bending lower die 11 and facilitate and speed up the mold maintenance, and can also improve the strength of the bending lower die 11, thereby increasing the mold life.

[0025] A boss is provided at each end of the top plate 12, and the double-sided clearance between the top plate 12 and the middle automatic correction mold clearance groove of the lower fixed plate 10 is 0.15-0.17mm, thus ensuring the accuracy of the positioning of the top plate 12, thereby ensuring the bending height quality of both sides after the product is bent.

[0026] The outer corner of the bending lower die 11 is designed to be inclined at 30°, and then the two sides are arc transitions, which can reduce the bending friction (because the product plate thickness is 6.0mm, it belongs to thick plate bending, and the friction is very large during bending), thereby ensuring that the bending heights of both sides of the product are the same after bending, and reducing the product's quality defects such as deep scratches due to high friction.

[0027] The mold bends two products at the same time, which not only ensures balanced force on both sides of the mold and reduces the gap change on both sides of the mold, thereby ensuring product quality and increasing mold life, but also improves production efficiency (that is, production efficiency increased by 79%).

[0028] Two anti-error pins 9 are provided on the right bending lower die 11 (because the product bending has directionality), so as to prevent the product from being scrapped due to positioning being placed in reverse (that is, when the product is positioned in reverse, it will be interfered by the anti-error pins 9 and cannot be placed in place).

[0029] Four punching rods 8 and unloading springs 4 are added to the upper die part for punching, which can prevent the product from sticking to the die, thereby improving production efficiency.

[0030] The present application is described in detail below in conjunction with the mold processing technology.

[0031] The two-piece bending die for the rear axle stabilizer bar support frame of the Jiangling E820 pure electric light truck is installed on a 160T press with a lower ejector cylinder in the same way as a common stamping die.

[0032] This type of Jiangling E820 pure electric light truck rear axle stabilizer bar support frame is made of 6.0mm thick hot-rolled plate through stamping. After the blanking, blanking-punching process, it can be directly used for bending processing of the bending die: Step 1: Install the bending die for bending two pieces of the automotive electric drive rear axle stabilizer bar support frame at one time on a 160T press with a lower ejection cylinder; Step 2: Place the two prefabricated stabilizer bar support frames after the blanking and punching process on the upper surface of the top plate 12, and use the positioning pins 13 to fix the two inner holes of the products, and use the anti-misplacement pins 9 to prevent misplacement; Step 3: Start the press machine, the upper mold plate 2 moves downward with the worktable on the machine bed, the upper bending mold 7 and the ejector plate 12 first press the product under the force of the lower ejector cylinder, and then continue to move downward with the upper bending mold 7 until the lower surface of the ejector plate 12 contacts the upper surface of the lower pad 14, and the upper bending mold 7, the lower bending mold 11 and the ejector plate 12 complete the bending process of the workpiece; Step 4: After the workpiece is bent, the upper slide of the press drives the upper part of the mold to return to its original position, and the punching rod 8 unloads the product under the force of the unloading spring 4, and the product remains in the lower mold, while the ejector 17 ejects the ejector plate 12 under the force of the ejector cylinder under the machine tool, and the ejector plate 12 ejects the product, and then the workpiece is taken out with an auxiliary tool and placed in the material box; Step 5: Repeat steps 2 to 4 to make the next two products.

[0033] After the Jiangling E820 pure electric light truck rear axle stabilizer bar support frame uses a two-piece bending mold and its processing technology, the bending-related dimensions are all within the tolerance range, which can continuously and stably ensure that the Jiangling E820 pure electric light truck rear axle stabilizer bar support frame meets the product drawing design requirements. The traditional one-piece bending is optimized to two-piece bending, which increases production efficiency by 79%, and saves the need to add another shaping process and shaping mold fees due to the height difference between the two sides after bending with the traditional bending mold. The mold uses bosses and grooves that automatically correct the mold gap, and bends two pieces at a time to balance the mold force, thereby increasing the mold life by 2.8 times, reducing production costs, and ensuring stable workpiece quality. It can continuously and stably ensure that the Jiangling E820 pure electric light truck rear axle stabilizer bar support frame meets the product drawing design requirements.

[0034] 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 by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A two-piece bending mold for bending a stabilizer bar support frame of an electric drive rear axle of an automobile at one time, which is divided into an upper part of the mold and a lower part of the mold. The upper part of the mold includes: Die handle, upper die plate, upper pad, unloading spring, upper fixing plate, guide sleeve, bent upper die and knockout rod; The lower part of the mold includes: anti-error pin, lower fixing plate, bending lower mold, ejector plate, positioning pin, lower pad, guide column, lower template and ejector rod; The invention is characterized in that the bending upper die is installed in the fixed cavity of the upper fixed plate by interference fit, and is connected to the upper pad from the upper end surface by bolts, the die handle is installed in the die handle hole of the upper die by interference fit, the guide sleeve is installed in the guide sleeve holes on both sides of the upper die by interference fit, four punching rods are directly placed in the corresponding punching rod holes of the bending upper die by clearance fit, four unloading springs are pre-compressed and installed in the corresponding unloading spring holes of the bending upper die and the upper pad, and the upper die plate and the upper pad are connected to the upper fixed plate by bolts and positioning pins; Two bending lower dies are installed on the left and right sides of the fixed cavity of the lower fixed plate through interference fit, and are connected to the lower fixed plate from the side by bolts respectively. Two anti-error pins are installed in the anti-error pin holes of the right bending lower die through interference fit. The guide pillars are installed in the guide pillar holes on both sides of the lower template through interference fit. The lower template and the lower pad are connected to the lower fixed plate through bolts and locating pins. Three ejector rods are directly placed in the corresponding ejector rod holes of the lower pad and the lower template through clearance fit. Four locating pins are respectively installed in the locating pin holes of the ejector plate through interference fit. The assembly of the ejector plate and the locating pins is directly placed in the ejector plate cavity composed of the lower fixed plate and the bending lower die through clearance fit.

2. The two-piece bending die for bending a two-piece automotive electric drive rear axle stabilizer bar support frame at one time according to claim 1, characterized in that: A boss for automatically correcting the mold gap is provided at each end of the bending upper mold, and a groove for automatically correcting the mold gap is provided at the upper and lower parts of the lower fixed plate, and the double-sided clearance between the boss for automatically correcting the mold gap of the bending upper mold and the groove for automatically correcting the mold gap of the lower fixed plate is 0.10-0.12mm.

3. A two-piece bending die for bending a two-piece automotive electric drive rear axle stabilizer bar support frame at one time according to claim 1 or 2, characterized in that: The bending lower die is of an inlaid type, the lower fixing plate is of an integral type, and the bending lower die is fixed in the shape cavity of the lower fixing plate through interference fit.

4. A two-piece bending die for bending a two-piece automotive electric drive rear axle stabilizer bar support frame at one time according to claim 1 or 2, characterized in that: The upper and lower ends of the ejector plate are each provided with a boss, and the double-sided clearance between the automatic mold clearance correction groove in the middle of the lower fixed plate is 0.15-0.17mm.

5. A two-piece bending die for bending a two-piece automotive electric drive rear axle stabilizer bar support frame at one time according to claim 1 or 2, characterized in that: The outer corner of the bending lower die is designed to have a slope of 30°, and arc transitions are used on both sides.

6. A two-piece bending die for bending a two-piece automotive electric drive rear axle stabilizer bar support frame at one time according to claim 1 or 2, characterized in that: The mold bends two products at the same time, ensuring balanced force on both sides of the mold and reducing changes in the gap between the two sides of the mold.

7. A two-piece bending die for bending a two-piece automotive electric drive rear axle stabilizer bar support frame at one time according to claim 1 or 2, characterized in that: The right bending lower die is provided with two anti-error pins.

8. A two-piece bending die for bending a stabilizer bar support frame for an electric drive rear axle of an automobile according to claim 1 or 2, characterized in that: Four ejector rods and unloading springs are added to the upper part of the mold to eject the material and prevent the product from sticking to the mold.

9. A processing technology for bending two bending dies at one time using the automotive electric drive rear axle stabilizer bar support frame according to claim 1, characterized in that: The steps include: Step 1: Install the bending die for bending two pieces of the automotive electric drive rear axle stabilizer bar support frame at one time on a 160T press with a lower ejection cylinder; Step 2: Place the two prefabricated stabilizer bar support frames after the blanking, blanking and punching processes on the upper surface of the top plate, and use positioning pins to fix the two inner holes of the products, and use anti-misplacement pins to prevent misplacement; Step 3: Start the press, the upper die plate moves downward along with the worktable on the machine bed, the upper bending die and the ejector plate first press the product under the force of the lower ejector cylinder, and then continue to move downward with the upper bending die until the lower surface of the ejector plate contacts the upper surface of the lower pad, and the upper bending die, the lower bending die and the ejector plate complete the bending process of the workpiece; Step 4: After the workpiece is bent, the upper slide of the press drives the upper part of the mold to return to its original position. The punch rod unloads the product under the force of the unloading spring and leaves the product in the lower mold. The ejector rod ejects the ejector plate under the force of the ejector cylinder under the machine tool. The ejector plate ejects the product, and then the workpiece is taken out with auxiliary tools and placed in the material box. Step 5: Repeat steps 2 to 4 to make the next two products.

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