Bending die for bending two automobile electrically-driven rear axle stabilizer bar supporting frame at one time

Abstract

The utility model discloses a die for bending two automobile electric drive rear axle stabilizer bar supporting frames at a time. The upper half portion of the die comprises a die handle, an upper die plate, an upper padding plate, a discharging spring, an upper fixing plate, a guide sleeve, an upper bending 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, a reshaping procedure and reshaping die cost which are needed 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 production cost is reduced. And the product quality is stable.

Description

Technical Field

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

[0002] The electric drive rear axle stabilizer bar support is welded to the vehicle's drive axle housing. Its main function is to securely install the vehicle stabilizer bar and control its installation position. This is used to resist the lateral force generated when the vehicle turns, limit the roll angle of the vehicle body, and thus improve the stability of the vehicle. Therefore, after the stabilizer bar support is bent, the difference in bending height on both sides 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, which makes it difficult to ensure the accuracy of mold production. Because the curved surface of the product has an inclination (i.e., larger at the top and smaller at the bottom), if a single piece is bent according to the traditional bending die design concept, the mold will be subjected to unilateral force. In this way, the gap between the upper and lower dies of the mold is prone to movement during the production process, and the difference in bending height on both sides of the product is difficult to meet the quality requirements, thus requiring an additional shaping process. Therefore, is it possible 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 is guaranteed 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 the mold design bends two pieces at a time to prevent the uniformity of the mold bending gap from being affected by unilateral force on the mold, thereby ensuring the consistency and stability of product quality, which is very necessary. Utility Model Content

[0003] One of the objectives of this utility model is to provide a two-piece bending die for a stabilizer bar support bracket for an electric rear axle vehicle. The die utilizes bosses and grooves that automatically adjust the gap between the two pieces, and balances the force applied to the two pieces during bending. This improves die precision, lifespan, and product quality. The two-piece bending die is installed on a press to bend the stabilizer bar support bracket.

[0004] The second purpose of the present invention is to design a bending die 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 this utility model is achieved in this way:

[0006] A two-piece bending die for bending a stabilizer bar support frame for an electric drive rear axle of an automobile at one time is divided into an upper half and a lower half of the die. The upper half 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;

[0007] 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;

[0008] 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. The four knockout rods are directly placed in the corresponding knockout rod holes of the bending upper die through clearance fit. The 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.

[0009] The 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. The 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. The three ejector rods are directly placed in the corresponding ejector rod holes of the lower pad and the lower template through clearance fit. The 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.

[0010] 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.

[0011] Furthermore, 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 cavity of the lower fixing plate by interference fit.

[0012] 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.

[0013] Furthermore, the outer corner of the bending lower die is designed to have a 30° slope, with arc transitions on both sides.

[0014] Furthermore, 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.

[0015] Furthermore, two anti-error pins are provided on the right bending lower die.

[0016] 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.

[0017] The second purpose of this utility model is achieved in this way:

[0018] A processing technology for bending two bending dies at one time using an automobile electric drive rear axle stabilizer bar support frame includes the following steps:

[0019] Step 1: Install the bending die for bending two pieces of the electric drive rear axle stabilizer bar support frame at a time on a 160T press with a lower ejector cylinder;

[0020] 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-error pins to prevent them from being placed upside down;

[0021] Step 3: Start the press, and the upper template moves downward with the worktable on the machine. The bending upper 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 bending upper die until the lower surface of the ejector plate contacts the upper surface of the lower pad. The bending upper die, the bending lower die and the ejector plate complete the bending process of the workpiece;

[0022] 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 ejector pin unloads the product under the force of the unloading spring and leaves the product in the lower mold. The ejector pin ejects the ejector plate under the force of the ejector cylinder under the machine tool. The ejector plate ejects the product, and then auxiliary tools are used to remove the workpiece and place it in the material box.

[0023] Step 5: Repeat steps 2 to 4 to make the next two products.

[0024] The beneficial effects of the utility model are as follows: the mold of the utility model adopts bosses and grooves that automatically correct 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 excessive height difference between the two sides after bending with a traditional bending mold, and the product quality is stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the main structure of the mold in the embodiment of the present utility model.

[0026] Figure 2 It is a schematic diagram of the top structure of the lower mold part in the embodiment of the present utility model.

[0027] Figure 3 It is a schematic diagram of the curved upper mold structure of the mold in the embodiment of the present utility model.

[0028] Figure 4 It is a schematic diagram of the bent lower die structure of the mold in the embodiment of the present utility model.

[0029] Figure 5 It is a schematic diagram of the structure of the stabilizer bar support frame in an embodiment of the present utility model. DETAILED DESCRIPTION

[0030] 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.

[0031] Reference Figures 1 to 5 A two-piece bending mold for bending the rear axle stabilizer bar support frame of an automobile electric drive at one time is divided into the upper part of the mold and the 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 a ejector rod 17.

[0032] 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 by bolts. The die handle 1 is installed in the die handle hole of the upper template 2 through interference fit. The guide sleeve 6 is installed in the guide sleeve holes on both sides of the upper template 2 through interference fit. The four punching rods 8 are directly placed in the corresponding punching rod holes of the bending upper die 7 through clearance fit. The 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 template 2 and the upper pad 3 are connected to the upper fixed plate 5 through bolts and locating pins; the 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, and 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. 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.

[0033] The curved upper die 7 of the upper die part is provided with a boss at each end for automatically correcting the die gap, and the lower fixed plate 10 of the lower die part is provided with a groove on the upper and lower sides for automatically correcting the die gap, and the double-sided clearance between the automatic mold gap correction boss of the curved upper die 7 and the automatic mold gap correction groove 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 mold manufacturing accuracy and life.

[0034] The bending lower die 11 is of inlaid type, the lower fixed plate 10 is of 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 make the mold maintenance convenient and quick, and can also improve the strength of the bending lower die 11, thereby increasing the life of the mold.

[0035] There is a boss at each end of the top plate 12, and the double-sided clearance between the automatic mold gap correction groove in the middle of the lower fixed plate 10 is 0.15 to 0.17 mm, which ensures the accuracy of the positioning of the top plate 12 and thus ensures the quality of the bending height on both sides of the product after bending.

[0036] The outer corner of the bending lower die 11 is designed to be inclined at 30 degrees, and then the two sides are arc transitions, which can reduce the bending friction (because the product plate thickness is 6.0mm, which is a 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 quality defects such as deep scratches due to high friction.

[0037] The mold bends two products at the same time, which not only ensures balanced force on both sides of the mold and reduces the change in the gap between the two sides of the mold, thereby ensuring product quality and increasing the life of the mold, but also improves production efficiency (that is, production efficiency increased by 79%).

[0038] Two anti-error pins 9 are provided on the right bending lower die 11 (because the product bending has directionality), which can prevent the product from being scrapped due to positioning being placed upside down (that is, when the product is positioned upside down, it will be interfered by the anti-error pins 9 and cannot be put into place).

[0039] 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.

[0040] The present application is described in detail below in conjunction with the mold processing technology.

[0041] The Jiangling E820 pure electric light truck rear axle stabilizer bar support frame bends two pieces at a time. The bending die is installed on a 160T press with a lower ejector cylinder in the same way as a common stamping die.

[0042] This type of rear axle stabilizer bar support for the Jiangling E820 pure electric light truck is made from 6.0mm thick hot-rolled plate through stamping. After the blanking and punching processes, it can be directly used for bending with a bending die:

[0043] Step 1: Install the bending die for bending two pieces of the automotive electric drive rear axle stabilizer bar support frame at a time on a 160T press with a lower ejection cylinder;

[0044] Step 2: Place the two prefabricated stabilizer bar support frames after the blanking, blanking-punching processes on the upper surface of the ejector plate 12, and use the positioning pins 13 to fix the two inner holes of the products, and use the anti-error pins 9 to prevent them from being placed upside down;

[0045] Step 3: Start the press, and the upper template 2 moves downward with the worktable on the machine. The bending upper die 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 bending upper die 7 until the lower surface of the ejector plate 12 contacts the upper surface of the lower pad 14. The bending upper die 7, the bending lower die 11 and the ejector plate 12 complete the bending process of the workpiece;

[0046] 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 ejector rod 8 unloads the product under the force of the unloading spring 4 and leaves the product in the lower mold. The ejector rod 17 ejects the ejector plate 12 under the force of the ejector cylinder under the machine tool. The ejector plate 12 ejects the product, and then the workpiece is taken out with auxiliary tools and placed in the material box.

[0047] Step 5: Repeat steps 2 to 4 to make the next two products.

[0048] The Jiangling E820 pure electric light truck's rear axle stabilizer bar support utilizes a two-piece bending die and its processing technology, ensuring that all bending-related dimensions remain within tolerance, consistently and reliably ensuring that the Jiangling E820 pure electric light truck's rear axle stabilizer bar support meets the product drawing design requirements. The optimization of the traditional one-piece bending process to two-piece bending improves production efficiency by 79%, eliminating the need for an additional shaping process and die costs associated with excessive height differences between the two sides after bending with traditional bending dies. The die incorporates bosses and grooves that automatically correct for gaps between the two sides, and a two-piece bending process that balances the die's forces. This increases die life by 2.8 times, reduces production costs, and ensures consistent part quality. This consistently and reliably ensures that the Jiangling E820 pure electric light truck's rear axle stabilizer bar support meets the product drawing design requirements.

[0049] 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 two-piece bending die for a rear axle stabilizer support frame for an electric drive vehicle is provided. The die is divided into an upper portion and a lower portion. The upper portion includes: Die handle, upper die plate, upper pad, unloading spring, upper fixing plate, guide sleeve, bending 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 pin; It is characterized in that the curved 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, the four knockout rods are directly placed in the corresponding knockout rod holes of the curved upper die through clearance fit, the four unloading springs are pre-compressed and installed in the corresponding unloading spring holes of the curved upper die and the upper pad, and the upper die plate and the upper pad are connected to the upper fixed plate through bolts and positioning pins; The 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. The 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. The three ejector rods are directly placed in the corresponding ejector rod holes of the lower pad and the lower template through clearance fit. The 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 bending die for bending two pieces of the electric drive rear axle stabilizer bar support frame of an automobile according to claim 1 is characterized in that: A boss for automatically correcting the mold gap is provided at each end of the curved upper mold, and a groove for automatically correcting the mold gap is provided at the upper and lower ends of the lower fixed plate, and the double-sided clearance between the automatic mold gap correction boss of the curved upper mold and the automatic mold gap correction groove of the lower fixed plate is 0.10 to 0.12 mm.

3. A two-piece bending die for bending a two-piece electric drive rear axle stabilizer bar support frame of an automobile 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 ejector plate and the middle automatic mold clearance groove is 0.15-0.17 mm.

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 degrees, and arc transitions are used on both sides.

6. 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: 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 electric drive rear axle stabilizer bar support frame of an automobile according to claim 1 or 2, characterized in that: Two anti-error pins are provided on the right bending lower die.

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.

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