Suspension bracket stamping device and process for reducing deformation

Abstract

This invention discloses a suspension bracket stamping processing equipment and process for reducing deformation, including a base, and further comprising: a mounting base fixed to the top outer wall of the base, and a lower die fixedly mounted on the mounting base; a slot penetrating one side inner wall of the lower die; a stress relief mechanism mounted on one side outer wall of the base; and an inner support mechanism mounted inside the lower die. The stress relief mechanism includes: a lead screw guide rail mounted on one side outer wall of the base, and a nut slider movably engaged on the lead screw guide rail; a lower support plate fixedly connected to the top outer wall of the nut slider, and multiple limiting rods fixedly connected to the top of the lower support plate; an upper support plate located directly above the lower support plate, and multiple limiting rods simultaneously movably inserted into the inner wall of the upper support plate; and multiple springs. The suspension bracket stamping processing equipment and process for reducing deformation disclosed in this invention has the effect of releasing stress through vibration and isolating and protecting the drive mechanism, thereby reducing the rebound deformation of the bracket.

Description

Technical Field

[0001] The present invention relates to the technical field of stamping forming, and in particular to a stamping processing device and process for a suspension bracket that reduces deformation. Background Art

[0002] As a key load-bearing component of automobile chassis, suspension brackets are usually formed by stamping processes. Such brackets generally have a Ω-shaped or U-shaped structure, featuring high side walls, thin wall thickness, small bottom fillets and other characteristics. During the stamping forming process, a plate is pressed down and folded by the upper die to form the side walls and the top of the bracket. After demolding, large uneven elastic stress remains inside the workpiece, which causes springback deformation such as outward expansion of the side walls and upward bulging of the top, seriously affecting the dimensional accuracy of the bracket and the quality of subsequent assembly.

[0003] To control springback deformation, the prior art mainly adopts methods such as pressure holding delay, die surface compensation and optimization of stamping process parameters. Pressure holding delay fully releases the internal stress of the material by extending the holding time of the upper die after pressing; die surface compensation reserves a reverse deformation allowance during die design, so that the dimensional of the workpiece just meets the requirements after springback; optimization of process parameters reduces the springback amplitude by adjusting parameters such as stamping speed and blank holder force. However, all these methods are passive countermeasures and do not fundamentally solve the problem of insufficient release of residual stress. When there are material batch fluctuations, die temperature changes or deviations in stamping speed, the springback amount will still fluctuate significantly, making it difficult to ensure the consistency of product quality. Summary of the Invention

[0004] The invention discloses a stamping processing device and process for a suspension bracket that reduces deformation, aiming at solving the technical problem that when material batch fluctuations, die temperature changes or deviations in stamping speed occur, the springback amount will still fluctuate significantly, making it difficult to ensure the consistency of product quality.

[0005] In order to achieve the above object, the present invention adopts the following technical solution: A stamping processing device for a suspension bracket that reduces deformation, comprising a base, further comprising: a mounting seat fixed to the top outer wall of the base, and a lower die is fixedly mounted on the mounting seat; a notch penetratingly arranged on an inner wall of one side of the lower die; a stress relief mechanism mounted on an outer wall of one side of the base; an internal support mechanism mounted inside the lower die; The stress relief mechanism includes: a lead screw guide rail, installed on one outer wall of the base, with a nut slider movably engaged on the lead screw guide rail; a lower support plate, fixedly connected to the top outer wall of the nut slider, with multiple limiting rods fixedly connected to the top of the lower support plate; an upper support plate, located directly above the lower support plate, with multiple limiting rods simultaneously moving through the inner wall of the upper support plate; multiple springs, simultaneously fixedly connected between the upper and lower support plates; and an ultrasonic generator, fixedly installed on the top outer wall of the upper support plate, with an amplitude transformer fixedly connected to its output end, one end of the amplitude transformer passing through a slot. A support frame is fixedly connected to the top outer wall of the base, and a top seat is movably sleeved on the support frame. An upper mold is fixedly installed at the bottom end of the top seat, and a hydraulic component is fixedly connected to the top end of the upper mold. The hydraulic component is installed at the top end of the support frame.

[0006] By incorporating a stress-relief mechanism, ultrasonic high-frequency vibration is applied to the workpiece sidewall, effectively promoting the dynamic release and uniform distribution of residual stress within the workpiece after stamping. This significantly reduces springback deformation after pressure relief and improves the forming accuracy of the bracket. The elastic suspension mounting structure, composed of an upper support plate, a lower support plate, a spring, and a limiting rod, allows the amplitude rod to flexibly retract upon contact with the workpiece, preventing hard contact from causing pressure marks or scratches on the workpiece surface. Simultaneously, it effectively isolates the transmission of high-frequency vibration to the lead screw guide and nut slider, protecting the drive mechanism and extending the equipment's service life. The limiting rod serves a dual function of guidance and limitation, constraining the upper support plate to only move slightly vertically without skewing, and limiting the maximum compression and return of the spring, ensuring the consistency of the amplitude rod's extension position each time and improving the repeatability of the vibration point. In a preferred embodiment, the internal support mechanism includes: a cavity disposed on the central inner wall of the lower mold; and an electrically operated telescopic rod fixedly installed on the bottom inner wall of the cavity. The internal support mechanism further includes: a mounting frame, fixedly connected to the output end of the electric telescopic rod; and a rubber pad, fixedly installed on the inner wall of one end of the mounting frame. The internal support mechanism further includes: a through groove, which is disposed through one side of the inner wall of the cavity, and a rubber pad passes through the through groove; and a groove, which is disposed on one side of the inner wall of the lower mold and located outside the through groove. The inner support mechanism further includes: a limiting sheet, fixed to one side of the outer wall of the rubber pad and movably embedded in the groove; and multiple limiting rods, which are simultaneously fixedly connected to one side of the outer wall of the mounting frame. The internal support mechanism further includes: a side support plate, which is fixedly connected to the bottom inner wall of the cavity, and multiple limiting rods 2 are movably inserted through one side inner wall of the side support plate; multiple springs 2, which are simultaneously sleeved on the outer periphery of multiple limiting rods 2, and one end of the springs is fixedly connected to the mounting frame, and the other end of the springs is fixedly connected to the side support plate.

[0007] By incorporating an internal support mechanism and utilizing the cooperation of a limiting sheet and a groove, the rubber pad is fully submerged in the groove during the stamping stage, with the outer wall of the limiting sheet flush with the outer wall of the groove. This creates a smooth fill in any gaps in the groove, effectively preventing surface indentations or forming defects caused by the workpiece sinking into the groove during the folding and forming process, thus ensuring stamping accuracy. A spring applies a pre-tension force in the retraction direction to the mounting bracket, ensuring that the limiting sheet reliably abuts against the inner end face of the groove when the electric telescopic rod retracts. This ensures that the rubber pad accurately returns to its fully submerged state each time, resulting in reliable operation and high repeatability. The rubber pad adheres to the inner surface of the workpiece's sidewall from the inside, creating a synergistic effect with the outer amplitude transformer. Vibration waves penetrate the workpiece from the outside and are absorbed by the inner rubber pad, achieving unidirectional transmission and avoiding interference from reflected waves, significantly improving the efficiency and uniformity of stress release. The flexible buffering effect of spring two allows the rubber pad to have a flexible yielding ability when it contacts the workpiece, avoiding damage to the inner wall of the workpiece caused by the rigid drive of the electric telescopic rod; at the same time, spring two provides auxiliary restoring force when retracting, improving the reliability of the action.

[0008] A suspension bracket stamping process for reducing deformation includes the following specific steps: S1: Stamping: The sheet metal is placed between the lower and upper dies. The upper die presses down to fold the sheet metal into a suspension bracket workpiece. After stamping, an integral protruding contact protrusion is formed on the outer surface of the side wall of the workpiece. The position of the contact protrusion corresponds to the position of the slot on the side wall of the lower die; S2: Pressure holding and vibration: During the pressure holding stage, the lead screw guide rail drives the nut slider to extend the amplitude rod. The amplitude rod passes through the slot and directly contacts the outer side of the contact protrusion. At the same time, the ultrasonic generator is activated, and high-frequency vibration is transmitted to the inside of the workpiece through the contact protrusion to release residual stress; S3: Removal and grinding: After the stress is released, the amplitude rod retracts, the workpiece is demolded, and the subsequent trimming and grinding process is carried out to remove the contact protrusion and grind it flat, so that the surface of the main body side wall of the workpiece is restored to integrity. In the S1 stamping step, the contact protrusion is located at the bottom edge of the outer surface of the workpiece sidewall, and its protrusion direction is perpendicular to the outer surface of the workpiece sidewall. The outer surface area of ​​the contact protrusion is larger than the end face area of ​​the output end of the amplitude transformer. The contact protrusion is completely removed in the S3 cutting and grinding step. After the removal, the outer surface of the workpiece sidewall is flush with the sidewall of the workpiece body.

[0009] By creating or pre-forming contact protrusions on the outer surface of the workpiece sidewall during the stamping process, the amplitude transformer contacts these contact protrusions instead of the workpiece sidewall during the pressure holding vibration process. High-frequency vibration energy is indirectly transmitted to the interior of the workpiece through the contact protrusions to release stress, thus fundamentally avoiding indentations, scratches, or local deformations that may be caused by the amplitude transformer directly contacting the workpiece surface, effectively ensuring the surface quality of the finished workpiece.

[0010] As described above, a suspension bracket stamping processing equipment for reducing deformation includes a base, and further includes: a mounting base, fixed to the top outer wall of the base, and a lower die fixedly mounted on the mounting base; a slot, penetrating the inner wall of one side of the lower die; a stress relief mechanism, mounted on the outer wall of one side of the base; and an inner support mechanism, mounted inside the lower die. The stress relief mechanism includes: a lead screw guide rail, mounted on the outer wall of one side of the base, and a nut slider movably engaged on the lead screw guide rail; a lower support plate, fixedly connected to the top outer wall of the nut slider, and a plurality of limiting rods fixedly connected to the top of the lower support plate; an upper support plate, located directly above the lower support plate, and the plurality of limiting rods simultaneously moving through the inner wall of the upper support plate; a plurality of springs, simultaneously fixedly connected between the upper support plate and the lower support plate; and an ultrasonic generator, fixedly mounted on the top outer wall of the upper support plate, and an amplitude transformer fixedly connected to its output end, one end of which passes through the slot. The suspension bracket stamping equipment and process provided by the present invention have the technical effect of reducing deformation by releasing stress through vibration and isolating and protecting the drive mechanism, thereby reducing the rebound deformation of the bracket. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of a suspension bracket stamping processing equipment for reducing deformation proposed in this invention.

[0012] Figure 2 This is a schematic diagram of the bottom structure of a suspension bracket stamping equipment for reducing deformation, as proposed in this invention.

[0013] Figure 3 This is a schematic diagram showing the stress relief mechanism of a suspension bracket stamping equipment for reducing deformation, as proposed in this invention.

[0014] Figure 4 This is a schematic diagram of the internal structure of the lower die of a suspension bracket stamping equipment for reducing deformation, as proposed in this invention.

[0015] Figure 5 This is a schematic diagram showing the internal structure of the lower die of a suspension bracket stamping equipment for reducing deformation, as proposed in this invention.

[0016] In the diagram: 1. Top seat; 2. Stand; 3. Base; 4. Mounting seat; 5. Lower mold; 6. Stress relief mechanism; 7. Internal support mechanism; 8. Groove; 601. Amplitude rod; 602. Ultrasonic generator; 603. Upper support plate; 604. Screw guide rail; 605. Limiting rod one; 606. Lower support plate; 607. Nut slider; 608. Spring one; 701. Cavity; 702. Side support plate; 703. Electric telescopic rod; 704. Spring two; 705. Limiting rod two; 706. Mounting frame; 707. Rubber pad; 708. Through groove; 709. Groove; 710. Limiting sheet. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0018] The suspension bracket stamping equipment and process disclosed in this invention for reducing deformation are mainly applied to the scenario of suspension bracket stamping.

[0019] Reference Figure 1 A suspension bracket stamping processing device for reducing deformation includes a base 3, a vertical frame 2, a top seat 1, a mounting base 4, a lower die 5, a stress relief mechanism 6, an inner support mechanism 7, and a slot 8. The vertical frame 2 is fixedly connected to the top outer wall of the base 3. The top seat 1 is movably sleeved on the vertical frame 2. An upper die is fixedly installed at the bottom end of the top seat 1, and a hydraulic component is fixedly connected to the top end of the upper die, which is installed at the top end of the vertical frame 2. The mounting base 4 is fixedly fixed to the top outer wall of the base 3, and the lower die 5 is fixedly installed on the mounting base 4. The slot 8 is formed through one inner wall of the lower die 5. The stress relief mechanism 6 is installed on one outer wall of the base 3, and the inner support mechanism 7 is installed inside the lower die 5.

[0020] Reference Figure 2 and Figure 3 The stress relief mechanism 6 is used to apply high-frequency vibration to the sidewall of the workpiece 9 during the pressure holding stage to release residual stress. Specifically, the stress relief mechanism 6 includes a lead screw guide 604, a nut slider 607, a lower support plate 606, a limiting rod 605, an upper support plate 603, a spring 608, an ultrasonic generator 602, and an amplitude transformer 601. The lead screw guide 604 is mounted on one outer wall of the base 3 and is driven to rotate by a servo motor. The nut slider 607 is movably engaged with the lead screw guide 604 and moves linearly along the lead screw axis as the lead screw guide 604 rotates. The lower support plate 606 is fixedly connected to the top outer wall of the nut slider 607 and moves forward and backward synchronously with the nut slider 607, thereby achieving precise control of the overall extension and retraction of the amplitude transformer 601. Multiple limiting rods 605 are fixedly connected to the top of the lower support plate 606. The upper support plate 603 is located directly above the lower support plate 606. Multiple limiting rods 605 are simultaneously inserted into the guide holes on the inner wall of the upper support plate 603 to guide and limit the vertical displacement of the upper support plate 603. Multiple springs 608 are simultaneously fixedly connected between the upper support plate 603 and the lower support plate 606, so that the upper support plate 603 is elastically suspended relative to the lower support plate 606. The ultrasonic generator 602 is fixedly installed on the top outer wall of the upper support plate 603, and its output end is fixedly connected to an amplitude transformer 601. One end of the amplitude transformer 601 passes through the slot 8 and points towards the side wall of the workpiece 9.

[0021] The working principle of the stress relief mechanism 6 is as follows: After stamping, the pressure holding stage begins. The lead screw guide rail 604 is driven to rotate by a servo motor, causing the nut slider 607 to move linearly along the lead screw axis. The lower support plate 606 moves forward synchronously with the nut slider 607. Through the spring 608 and the limiting rod 605, the upper support plate 603, the ultrasonic generator 602 mounted on it, and the amplitude transformer 601 move forward as a whole, so that the amplitude transformer 601 passes through the slot 8 on the side wall of the lower die 5 and contacts the outer surface of the side wall of the workpiece 9 or the protrusion. The ultrasonic generator 602 starts, converting the high-frequency electrical signal into mechanical vibration. After the amplitude transformer 601 amplifies the amplitude, it outputs high-frequency micro-amplitude vibration. The vibration energy penetrates the side wall of the workpiece 9, exciting the residual elastic stress inside the workpiece 9 to undergo micro-dynamic relaxation, making the stress distribution tend to be uniform. During this process, the upper support plate 603 generates a slight compression of the spring 608 relative to the lower support plate 606, achieving flexible contact and effectively blocking the transmission of high-frequency vibration to the lower support plate 606 and the lead screw guide 604, protecting the precision drive mechanism from vibration damage. The limiting rod 605 serves a dual function of guidance and limitation: on the one hand, it constrains the upper support plate 603 to only move slightly vertically and not to produce skew; on the other hand, it limits the maximum compression and maximum return of the spring 608, ensuring the consistency of the extension position of the amplitude rod 601 each time and improving the repeatability of the vibration point. After the vibration is completed, the lead screw guide 604 reverses, and the nut slider 607 drives the lower support plate 606 and the upper support plate 603 to retract as a whole, and the amplitude rod 601 exits the slot 8, making room for demolding.

[0022] Reference Figures 4 to 5The inner support mechanism 7 is used to fill the gap in the slot 708 during the stamping stage to maintain the integrity of the inner wall of the lower die 5, and to adhere to the side wall of the workpiece 9 from the inside during the pressure holding and vibration stage to absorb vibration waves. Specifically, the inner support mechanism 7 includes a cavity 701, an electric telescopic rod 703, a mounting bracket 706, a rubber pad 707, a slot 708, a groove 709, a limiting sheet 710, a second limiting rod 705, a side support plate 702, and a second spring 704. The cavity 701 is located inside the center of the lower die 5, providing installation space for the components of the inner support mechanism 7. The electric telescopic rod 703 is fixedly installed on the inner wall of the bottom end of the cavity 701. The mounting bracket 706 is fixedly connected to the output end of the electric telescopic rod 703. The rubber pad 707 is fixedly installed on the inner wall of one end of the mounting bracket 706. The slot 708 is provided through one side of the inner wall of the cavity 701, and the rubber pad 707 passes through the slot 708 and can reciprocate along the direction of the slot 708. A groove 709 is located on one inner wall of the lower mold 5 and outside the through groove 708. A limiting sheet 710 is fixed to the outer wall of the rubber pad 707 near the groove 709 and is movably embedded in the groove 709. Multiple limiting rods 705 are simultaneously fixedly connected to one outer wall of the mounting frame 706. A side support plate 702 is fixedly connected to the bottom inner wall of the cavity 701, and multiple limiting rods 705 are movably inserted into guide holes on one inner wall of the side support plate 702 to guide the telescopic movement of the mounting frame 706 and ensure that its movement direction is consistent with the axis of the through groove 708. Multiple springs 704 are simultaneously sleeved on the outer periphery of multiple limiting rods 705. One end of the spring 704 is fixedly connected to the mounting frame 706, and the other end is fixedly connected to the side support plate 702. The spring 704 always applies a pulling force to the mounting frame 706 in the retraction direction.

[0023] The working principle of the inner support mechanism 7 is as follows: During the stamping stage, the electric telescopic rod 703 is in the retracted state, and the tension of the spring 704 pulls the mounting bracket 706 and the rubber pad 707 back until the limiting sheet 710 abuts against the inner end face of the groove 709, so that the rubber pad 707 is completely submerged in the through groove 708 and does not protrude from the inner side wall surface of the lower die 5. At this time, the outer wall of the limiting sheet 710 is flush with the outer wall of the groove 709, forming a smooth filling of the missing part of the through groove 708, so that the inner side wall of the lower die 5 maintains a complete plane at the through groove 708 position, avoiding the workpiece 9 from being crushed into the through groove 708 during the folding and forming process, resulting in indentations or forming defects. During the pressure-holding vibration stage, the electric telescopic rod 703 extends, pushing the mounting bracket 706 to move closer to the side wall of the workpiece 9, overcoming the tension of the second spring 704. The limiting sheet 710 moves synchronously with the mounting bracket 706, and the rubber pad 707 extends from the slot 708 and adheres to the inner surface of the side wall of the workpiece 9. At this time, the second spring 704 is further stretched, providing a reverse flexible tension to prevent the rubber pad 707 from generating a rigid impact on the side wall of the workpiece 9, while keeping the contact pressure of the rubber pad 707 within a certain range. When the high-frequency vibration wave output by the outer amplitude rod 601 passes through the side wall of the workpiece 9 and reaches the inner side, the rubber pad 707 absorbs the vibration energy with its elastic deformation, preventing the vibration wave from reflecting on the rigid mold surface and forming standing wave interference, so that the vibration energy penetrates the workpiece 9 unidirectionally, achieving a full and uniform release of residual stress. After the vibration ends, the electric telescopic rod 703 retracts, and the pulling force of the second spring 704 assists in pulling the mounting bracket 706 back to its original position. The limiting sheet 710 abuts against the inner end face of the groove 709 again, causing the rubber pad 707 to retract completely into the through groove 708, thus freeing up demolding space.

[0024] Reference Figures 1 to 5 The present invention also provides a stamping process for reducing deformation of suspension brackets, comprising the following specific steps: S1. Stamping: The sheet metal is placed between the lower die 5 and the upper die. The upper die presses down to fold the sheet metal into the suspension bracket workpiece 9. After stamping, an integral protruding contact protrusion is formed on the outer surface of the side wall of the workpiece 9. The position of this contact protrusion corresponds to the position of the slot 8 on the side wall of the lower die 5. This contact protrusion is located at the bottom edge of the outer surface of the side wall of the workpiece 9, and its protrusion direction is perpendicular to the outer surface of the side wall of the workpiece 9. The outer surface area of ​​the contact protrusion is larger than the end face area of ​​the output end of the amplitude transformer 601. This contact protrusion utilizes the process allowance that already exists after stamping. There is no need to add complex structures or special forming processes to the mold. It is only necessary to reserve forming space for the contact protrusion in the corresponding area of ​​the slot 8 in the mold cavity.

[0025] S2, Pressure Holding Vibration: During the pressure holding stage, the lead screw guide 604 rotates under the drive of the servo motor, causing the nut slider 607 to move linearly along the lead screw axis. The lower support plate 606 moves forward synchronously with the nut slider 607, driving the upper support plate 603, the ultrasonic generator 602 mounted on it, and the amplitude transformer 601 forward as a whole via the spring 608 and the limiting rod 605. This allows the amplitude transformer 601 to pass through the slot 8 on the side wall of the lower die 5. The output end of the amplitude transformer 601 directly contacts the outer surface of the contact protrusion on the outer surface of the workpiece 9's side wall. Because the outer surface area of ​​the contact protrusion is larger than the end face area of ​​the output end of the amplitude transformer 601, full coverage of vibration energy transmission is ensured, avoiding energy loss or localized stress concentration due to insufficient contact area. The ultrasonic generator 602 starts, converting the high-frequency electrical signal into mechanical vibration, which is then amplified by the amplitude transformer 601 and output as a high-frequency micro-amplitude vibration. High-frequency vibration energy is transmitted to the interior of workpiece 9 through the output end of amplitude transformer 601, contact protrusion, and the side wall of workpiece 9, exciting the residual elastic stress inside workpiece 9 to undergo dynamic relaxation, making the stress distribution more uniform, thereby effectively reducing rebound deformation after pressure relief. During this process, since the vibration energy is indirectly transmitted through the contact protrusion, the output end of amplitude transformer 601 does not directly contact the surface of the side wall of workpiece 9, thus leaving no indentations, scratches, or microscopic damage on the surface. Simultaneously, the upper support plate 603 generates a slight compression of the spring 608 relative to the lower support plate 606, achieving flexible contact and effectively blocking the transmission of high-frequency vibration to the lower support plate 606 and the lead screw guide 604. The electric telescopic rod 703 of the inner support mechanism 7 extends synchronously, pushing the rubber pad 707 out of the slot 708 and into contact with the inner surface of the side wall of workpiece 9, absorbing the vibration waves penetrating workpiece 9 from the inside, preventing reflected wave interference, and achieving coordinated stress release from both inside and outside.

[0026] S3. Removal and Grinding: After stress release, the amplitude transformer 601 retracts, the rubber pad 707 retracts into the slot 708, and the workpiece 9 is demolded, entering the subsequent trimming and grinding process. Since the contact protrusion is a process allowance formed during stamping and not a functional structure of the finished workpiece 9, it is completely removed and ground until flush with the outer surface of the main body sidewall of workpiece 9 during the trimming and grinding process. After removal, the main body sidewall surface of workpiece 9 is intact, the dimensional accuracy meets the finished product design requirements, and the appearance quality of the finished product is not affected in any way.

[0027] The overall workflow of the suspension bracket stamping equipment and process for reducing deformation provided by this invention is as follows: First, the sheet metal is placed on the lower die 5. The hydraulic component drives the top seat 1 to move down along the upright 2, and the upper die presses down accordingly, causing the sheet metal to fold and form the suspension bracket workpiece 9. During the stamping process, the rubber pad 707 of the inner support mechanism 7 is completely submerged in the through groove 708 under the tension of the spring 704. The limiting sheet 710 is flush with the groove 709, and the inner sidewall of the lower die 5 remains a complete plane, preventing the workpiece 9 from sinking into the through groove 708 and causing defects. After stamping, the pressure holding stage begins. The lead screw guide 604 of the stress relief mechanism 6 drives the nut slider 607 to move forward, and the amplitude rod 601 passes through the slot 8 and contacts the contact protrusion on the outer surface of the sidewall of the workpiece 9. At the same time, the electric telescopic rod 703 of the inner support mechanism 7 extends, pushing the rubber pad 707 out of the through groove 708 and into contact with the inner surface of the sidewall of the workpiece 9. The ultrasonic generator 602 is activated, and high-frequency vibrations are transmitted to the interior of the workpiece 9 through the output end of the amplitude transformer 601 and the contact protrusion, releasing residual stress. The vibration waves penetrating the workpiece 9 are absorbed by the inner rubber pad 707 to prevent reflection interference. After vibration is complete, the amplitude transformer 601 retracts, the rubber pad 707 retracts into the groove 708, the upper mold is lifted, and the workpiece 9 is demolded. Finally, the subsequent trimming and grinding process is carried out to completely remove the contact protrusion and grind it flat, resulting in a finished suspension bracket with stable dimensions and a complete surface.

[0028] Working Principle: During use, the sheet metal is placed on the lower die 5, and the upper die presses down to fold the sheet metal into the suspension bracket workpiece 9. During the stamping process, the stress relief mechanism 6 is in a retracted state, and the amplitude transformer 601 is located outside the lower die 5, not interfering with the stamping action. After stamping, the pressure holding stage begins. The lead screw guide 604 drives the nut slider 607 to move forward, causing the lower support plate 606 and the upper support plate 603 to move as a whole towards the workpiece 9, so that the amplitude transformer 601 passes through the slot 8 on the side wall of the lower die 5 and contacts the outer surface of the side wall of the workpiece 9. At the same time, the ultrasonic generator 602 is activated, converting the high-frequency electrical signal into mechanical vibration. After being amplified by the amplitude transformer 601, it outputs high-frequency micro-amplitude vibration. The vibration energy penetrates the side wall of the workpiece 9, exciting the residual elastic stress inside the workpiece 9 to undergo dynamic relaxation, making the stress distribution tend to be uniform, thereby reducing the rebound deformation after pressure relief. During this process, the upper support plate 603 and the lower support plate 606 are elastically connected by multiple springs 608. The amplitude rod 601 is mounted on the upper support plate 603. When high-frequency vibration occurs, the upper support plate 603 slightly compresses the springs 608 relative to the lower support plate 606, achieving flexible contact and effectively blocking the transmission of high-frequency vibration to the lower support plate 606 and the lead screw guide 604, protecting the drive mechanism from vibration damage. The limiting rod 605 guides and limits the vertical displacement of the upper support plate 603, ensuring the consistency of the extension position of the amplitude rod 601 each time. After vibration is completed, the lead screw guide 604 reverses and drives the nut slider 607 to retract, causing the amplitude rod 601 to retract, and the workpiece 9 is demolded, subsequently entering the subsequent trimming and grinding process. Thus, a complete stamping stress relief operation is completed.

[0029] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A suspension bracket stamping processing equipment for reducing deformation, comprising a base (3), characterized in that, Also includes: Mounting base (4) is fixed to the top outer wall of the base (3), and a lower mold (5) is fixedly mounted on the mounting base (4). The slot (8) is provided through the inner wall of one side of the lower mold (5); Stress relief mechanism (6) is installed on one side of the outer wall of the base (3); The inner support mechanism (7) is installed inside the lower mold (5); The stress relief mechanism (6) includes: The lead screw guide (604) is installed on one side of the outer wall of the base (3), and a nut slider (607) is movably engaged on the lead screw guide (604). The lower support plate (606) is fixedly connected to the top outer wall of the nut slider (607), and multiple limiting rods (605) are fixedly connected to the top of the lower support plate (606). The upper support plate (603) is located directly above the lower support plate (606), and multiple limiting rods (605) simultaneously move and insert into the inner wall of the upper support plate (603); Multiple springs (608) are simultaneously fixedly connected between the upper support plate (603) and the lower support plate (606); An ultrasonic generator (602) is fixedly installed on the top outer wall of the upper support plate (603), and its output end is fixedly connected to an amplitude transformer (601), one end of which passes through the slot (8).

2. The suspension bracket stamping equipment for reducing deformation according to claim 1, characterized in that, The top outer wall of the base (3) is fixedly connected to the upright (2), and the top seat (1) is movably sleeved on the upright (2). The bottom end of the top seat (1) is fixedly installed with an upper mold, and the top end of the upper mold is fixedly connected with a hydraulic component. The hydraulic component is installed on the top end of the upright (2).

3. The suspension bracket stamping equipment for reducing deformation according to claim 1, characterized in that, The internal support mechanism (7) includes: A cavity (701) is located on the inner wall of the center of the lower mold (5); An electric telescopic rod (703) is fixedly installed on the inner wall of the bottom end of the cavity (701).

4. The suspension bracket stamping equipment for reducing deformation according to claim 2, characterized in that, The internal support mechanism (7) also includes: Mounting bracket (706) is fixedly connected to the output end of electric telescopic rod (703); A rubber pad (707) is fixedly installed on the inner wall of one end of the mounting bracket (706).

5. The suspension bracket stamping equipment for reducing deformation according to claim 4, characterized in that, The internal support mechanism (7) also includes: A through groove (708) is provided through one side of the inner wall of the cavity (701), and a rubber pad (707) passes through the through groove (708). The groove (709) is provided on one side of the inner wall of the lower mold (5) and is located outside the through groove (708).

6. The suspension bracket stamping equipment for reducing deformation according to claim 5, characterized in that, The internal support mechanism (7) also includes: The limiting sheet (710) is fixed to one side of the outer wall of the rubber pad (707) and is movably embedded in the groove (709); Multiple limit rods (705) are simultaneously fixedly connected to one side of the outer wall of the mounting bracket (706).

7. The suspension bracket stamping equipment for reducing deformation according to claim 6, characterized in that, The internal support mechanism (7) also includes: The side support plate (702) is fixedly connected to the bottom inner wall of the cavity (701), and multiple limiting rods (705) are movably inserted through one side inner wall of the side support plate (702); Multiple springs (704) are simultaneously sleeved on the outer periphery of multiple limit rods (705), with one end of each spring fixedly connected to the mounting bracket (706) and the other end of each spring fixedly connected to the side support plate (702).

8. A stamping process for reducing deformation of a suspension bracket, applied to the stamping equipment for reducing deformation of a suspension bracket as described in claim 2, characterized in that, The specific steps include the following: S1: Stamping: The sheet metal is placed between the lower die (5) and the upper die. The upper die presses down to fold the sheet metal into a suspension bracket workpiece. After stamping, an integral protruding contact protrusion is formed on the outer surface of the side wall of the workpiece. The position of the contact protrusion corresponds to the position of the slot (8) on the side wall of the lower die (5). S2: Pressure holding vibration: When entering the pressure holding stage, the lead screw guide (604) drives the nut slider (607) to extend the amplitude rod (601). The amplitude rod (601) passes through the slot (8) and directly contacts the outer side of the contact protrusion. At the same time, the ultrasonic generator (602) is started, and high-frequency vibration is transmitted to the inside of the workpiece through the contact protrusion to release residual stress. S3: Cutting and Grinding: After the stress is released, the amplitude rod (601) retracts, the workpiece is demolded, and enters the subsequent trimming and grinding process. The contact protrusion is cut off and ground flat, so that the surface of the main body side wall of the workpiece is restored to completeness.

9. The suspension bracket stamping process for reducing deformation according to claim 8, characterized in that, In the S1 stamping step, the contact protrusion is located at the bottom edge of the outer surface of the workpiece sidewall, and its protrusion direction is perpendicular to the outer surface of the workpiece sidewall. The outer surface area of ​​the contact protrusion is greater than the end face area of ​​the output end of the amplitude transformer (601). The contact protrusion is completely removed in the S3 cutting and grinding step. After the removal, the outer surface of the workpiece sidewall is flush with the sidewall of the workpiece body.

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