CUTTING AND PUNCHING DIE FOR THE C-PORT OF THE FRONT LOWER CONTROL ARM, AND METHOD OF CUTTING IT
Patent Information
- Authority / Receiving Office
- MX · MX
- Patent Type
- Patents
- Current Assignee / Owner
- SHANGHAI HUIZHONG AUTOMOTIVE MFG
- Filing Date
- 2023-02-09
- Publication Date
- 2026-06-12
AI Technical Summary
Existing methods for forming C-ports in front lower control arms of MacPherson struts face challenges in ensuring both sufficient strength and dimensional accuracy, often resulting in burrs and damaged edges due to complex geometric shapes and high-strength materials, leading to high maintenance costs.
A trimming and punching die system comprising a lower die with a conical wedge mechanism and a male trimming die, which allows for a single-trimming process by sliding mechanisms to ensure precise and burr-free cuts, using materials like tungsten carbide or titanium alloys for enhanced durability.
The system achieves improved dimensional accuracy and efficiency, reduces maintenance costs, and ensures the C-port conforms to digital models without nicks or burrs, enhancing production quality.
Smart Images
Figure MX435187B0
Abstract
Description
CUTTING AND PUNCHING DIE FOR THE C PORT OF THE FRONT LOWER CONTROL ARM, AND METHOD OF CUTTING IT BACKGROUND OF THE INVENTION The present invention falls within the field of C-port trimming and in particular relates to a trimming and punching die for a C-port of a front lower control arm and a method of trimming the same. TECHNICAL BACKGROUND In the prior art, a one-piece front lower control arm is a key component of a MacPherson strut, commonly used in current mainstream vehicles. The front lower control arm is formed from a single piece of ultra-high-strength steel plate by punching. Depending on the space requirements, this part has unique geometric characteristics. A C-port has a unique shape and stringent dimensional requirements. Fig. 1 shows a schematic structural diagram of a front lower control arm in the prior art. As shown in Fig. 1, the front lower control arm has two C10 ports. Currently, the C10 port is typically formed by conventional punching. For C10 port trimming, it is difficult to ensure that a trimming insert has sufficient strength while simultaneously guaranteeing dimensional accuracy. Therefore, it is impossible to meet the requirements for both the service life of the trimming insert and the trimming quality of a punched part. Figure 2 shows a first schematic diagram of a clipping method for a C-port in the prior art. Figure 3 shows a second schematic diagram of the clipping method for a C-port in the prior art. As shown in Figures 2 and 3, in a conventional trimming method for a port C, the trimming is performed twice from the outside of the part to the inside. Figure 2 shows the first trimming, in which a male trimming die 23 is used and moved in direction A to perform the first trimming in port C. Figure 3 shows the second trimming, in which the male trimming die 23 is used and moved in direction A. ML / a / ZUZ J / UUl DO í movement of the male die to perform the second cut in port C 10. Fig. 4 shows a schematic diagram of a C-port burr in the prior art after trimming. As shown in Fig. 4, in this process, the two side trimming procedures are performed at different trimming and punching angles, and a notch and burr are formed in a joined position of the process, i.e., a burr 100 generated after the two trimming procedures, which, therefore, cannot meet the dimension and appearance requirements. Furthermore, due to the part's shape limitations, port C has a small and narrow positional space, making it difficult to configure a side-trimming structure and thus impossible to guarantee the quality and stability of the trimming. Additionally, the part is made of a high-strength material, and the die has limited space, restricting the structural shape and dimensions. Consequently, the trimmed edge of port C is frequently damaged, resulting in high maintenance costs. In view of this, the inventor of the present application has designed a trimming method for processing a C port, in order to overcome the above technical problems. BRIEF DESCRIPTION OF THE INVENTION The technical problem to be solved by the present invention is to provide a method of trimming for a C-port, in order to overcome problems such as the configuration of a side trimming structure for a C-port in the prior art, which cannot guarantee the quality and stability of the trimming. The present invention solves the above technical problem by means of the following technical solution: A trimming and punching die for a port C of a front lower control arm, the trimming and punching die comprising a lower die and an upper die, wherein the lower die comprises a lower die base, a female die taper wedge mechanism, a male trimming die, and a male die taper wedge mechanism, the female die taper wedge mechanism and the male die taper wedge mechanism being slidably mounted on the lower die base, a mounting space formed between the female die taper wedge mechanism and the male die taper wedge mechanism, a first arm portion of a front lower control arm to be processed being mounted in the mounting space, the male trimming die being mounted on an inner wall surface of the male die taper wedge mechanism, and the male trimming die being inserted into a port C of the first arm portion;an upper portion of the female die taper wedge mechanism is provided with a recess, and a second portion of the front lower control arm is mounted in the recess so that the front lower control arm is mounted through the female die taper wedge mechanism;and the upper die comprises an upper die base, a female die drive block, and a male die drive block, and when the upper die and the lower die match each other and hold the die, the female die drive block cooperates with the female die conical wedge mechanism to drive the female die conical wedge mechanism to move, and the male die drive block cooperates with the male die conical wedge mechanism to drive the male die conical wedge mechanism to move, so that the male die trims the C port of the front lower control arm from the inside out. In one embodiment of the present invention, two ends of one side of the female die conical wedge mechanism are respectively provided with at least one first driving surface that is oblique, the female die driving block and the first driving surface coincide with each other, and the female die conical wedge mechanism is moved by a thrust force between the female die driving block and the first driving surface. In one embodiment of the present invention, the first driving surfaces are located on two sides of the recess. In one embodiment of the present invention, the recess has a greater width than the second part of the arm, and gaps are left between the surfaces of the inner walls of the side parts of the recess and the second part of the arm. In one embodiment of the present invention, the base of the lower die is provided with at least one guide rail, a lower end of the female die's conical wedge mechanism is provided with at least one sliding groove in the guide rail, and the female die's conical wedge mechanism is mounted on the guide rail via the sliding groove in the guide rail. In one embodiment of the present invention, a wall surface of the female die conical wedge mechanism facing the first arm part is provided with a female cutting groove that matches the shape of the first arm part and is configured to allow the first arm part to be fitted into a fixed position. In one embodiment of the present invention, an outer side surface of the male die conical wedge mechanism is provided with at least a second driving surface that is oblique, the female die driving block and the second driving surface coincide with each other, and the male die conical wedge mechanism is moved by a thrust force between the male die driving block and the second driving surface. In one embodiment of the present invention, the male trimming die comprises a base body and an edge portion, the edge portion being mounted on the base body by means of additive manufacturing. In one embodiment of the present invention, an end portion of the edge portion has an arc surface. In one embodiment of the present invention, the rim portion is made of tungsten carbide, a titanium alloy, a titanium-based composite material, an iron-based composite material, or a metal-based ceramic material. The present invention further provides a method for trimming a port C of a front lower control arm, wherein the trimming method uses the trimming and punching die for a port C of a front lower control arm mentioned above. The trimming method comprises the following steps: ML / a / ZUZ J / UUl DO í Yes, placing a front lower control arm to be processed having a C port on a lower die of a trimming and punching die, with a first arm portion, having the C port, of the front lower control arm being in a mounting space between a female die taper wedge mechanism and a male die taper wedge mechanism of the lower die, and a second portion of the front lower control arm mounting in a recess of the female die taper wedge mechanism, such that the front lower control arm is mounted through the female die taper wedge mechanism; S2, move a press down to allow an upper die of the trimming and punching die to move down together to compress the front lower control arm; S3, enabling a female die drive block of the upper die to be in contact and cooperate with the female die taper wedge mechanism in the lower die to drive the female die taper wedge mechanism so that it slides close and compresses the first part of the arm, which has port C, of the front lower control arm; S4, enabling a male die drive block of the upper die to contact and cooperate with the male die taper wedge mechanism in the lower die to drive the male die taper wedge mechanism to slide near the front lower control arm, and trim port C by means of the male trimming die provided in the male die taper wedge mechanism; and S5, move the press upwards to allow the upper die to separate from the lower die, and pull out the front lower control arm. In one embodiment of the present invention, step S2 specifically comprises: allowing a pressure plate of the upper die to come into contact with the front lower control arm and compress the front lower control arm. In one embodiment of the present invention, the pressure of the pressure plate is 100 12t. In one embodiment of the present invention, step S3 specifically comprises: S31, allowing a driving surface of the female die drive block and a driving surface of the female die taper wedge mechanism to come into contact and slide against each other, so that the female die taper wedge mechanism slides along a guide rail of the lower die; and S32, allow a female trim groove of the female die's tapered wedge mechanism to fit snugly into port C and continue applying pressure. In one embodiment of the present invention, step S4 specifically comprises: S41, allowing a driving surface of the male die drive block and a driving surface of the male die taper wedge mechanism to come into contact and slide against each other, so that the male die taper wedge mechanism slides close to a port C; and S42, mount the male trimming die on the male die's tapered wedge mechanism and trim port C by means of the male trimming die together with the movement of the male die's tapered wedge mechanism. In one embodiment of the present invention, step S5 specifically comprises: S51, move the press upwards to allow the driving surface of the male die drive block to separate from the driving surface of the male die taper wedge mechanism, so that the male die taper wedge mechanism returns to an initial assembly position under the action of its own force source; MA / a / ZUZ J / UUl DO í S52, separating the driving surface of the male die drive block from the driving surface of the female die taper wedge mechanism, so that the female die taper wedge mechanism retracts to an initial assembly position under the action of its own force source; and S53, separate the upper die pressure plate from the front lower control arm and remove the front lower control arm from the cutting and punching die. In one embodiment of the present invention, the distance between the female die conical wedge mechanism and the male die conical wedge mechanism in step Si is greater than 70 mm before trimming. In one embodiment of the present invention, the distance between the female die conical wedge mechanism and the male die conical wedge mechanism in step S4 is greater than or equal to 20 mm during trimming. The present invention has the following beneficial effects. The trimming and punching die for a C-port of a front lower control arm of the present invention ensures that the C-port can be processed with a single cut, improving both the dimensional accuracy of the C-port and the trimming efficiency. The C-port trimmed with the trimming and punching die is burr-free and consistent with a digital model. Furthermore, the use of new materials for the trimming and punching die effectively reduces die maintenance costs while also achieving good dimensions and appearance. The trimming method for a C-port of a front lower control arm of the present invention ensures that the C-port can be processed with a single trimming procedure, thereby improving both the dimensional accuracy of the C-port and the trimming efficiency. Using this trimming method, the C-port, after trimming and drilling, is free of burrs and nicks and remains consistent with the digital model. BRIEF DESCRIPTION OF THE FIGURES The foregoing and other features, properties and advantages of the present invention will become clearer from the following description together with the accompanying drawings and embodiments, and the same reference numbers indicate the same features in all the figures, in which: Fig. 1 shows a schematic structural diagram of a front lower control arm in the prior art. Fig. 2 shows a first schematic diagram of a clipping method for a C port in the prior art. Fig. 3 shows a second schematic diagram of the clipping method for a C port in the prior art. Fig. 4 shows a schematic diagram of a C-port burr in the prior art after trimming. Fig. 5 is a perspective view of a lower die in a trimming and punching die for a C-port of the front lower control arm of the present invention. Fig. 6 is a perspective view of an upper die in the trimming and punching die for a C-port of the front lower control arm of the present invention. Fig. 7 is a first perspective view of a female die taper wedge mechanism in the trimming and punching die for a C port of the front lower control arm of the present invention. Fig. 8 is a second perspective view of the female die conical wedge mechanism in the trimming and punching die for a C port of the front lower control arm of the present invention. Fig. 9 is a perspective view of a male trimming die in the trimming and punching die for a C port of the front lower control arm of the present invention. Fig. 10 is a schematic diagram of the cutting and punching die for a C port of the front lower control arm of the present invention in a state of use. Fig. 11 is a flowchart of a trimming method for a C-port of the front lower control arm of the present invention. Detailed description of preferred modalities The present invention is further illustrated below in conjunction with the embodiments and drawings. Figure 5 is a perspective view of a lower die in a trimming and punching die for a C-port of the front lower control arm of the present invention. Figure 6 is a perspective view of an upper die in the trimming and punching die for a C-port of the front lower control arm of the present invention. As shown in Figures 5 and 6, the present invention describes a trimming and punching die for a C-port of a front lower control arm. The trimming and punching die comprises a lower die 20 and an upper die 30. The lower die 20 comprises a lower die base 21, a female die taper wedge mechanism 22, a male trimming die 23, and a male die taper wedge mechanism 24. The female die taper wedge mechanism 22 and the male die taper wedge mechanism 24 are slidably mounted on the lower die base 21.A mounting space B is formed between the female die taper wedge mechanism 22 and the male die taper wedge mechanism 24. A first arm portion 41 of a front lower control arm 40 to be machined is mounted in the mounting space B. The male trimming die 23 is mounted on an inner wall surface of the taper wedge mechanism 24 of the male die, and the male trimming die 23 enters and exits ports C 43 of the first arm portion 41. An upper portion of the female die taper wedge mechanism 22 is provided with a recess 221, and a second arm portion 42 of the front lower control arm is mounted in the recess 221 so that the front lower control arm 40 is mounted through the female die taper wedge mechanism 22. The upper die 30 comprises an upper die base 31, a female die drive block 32, and a male die drive block 33. When the J / UUl DO í upper die 30 and lower die 20 match each other and hold the die, the female die drive block 32 cooperates with the female die taper wedge mechanism 22 to drive the female die taper wedge mechanism 22 to move, and the male die drive block 33 cooperates with the male die taper wedge mechanism 24 to drive the male die taper wedge mechanism 24 to move, so that the male die 23 trims the C 43 ports of the front lower control arm 40 from the inside out. Before and after the C ports are cut, the male cutting die 23 is located between the two C ports of the part, i.e., during the cutting, the male cutting die 23 moves from the inside of the part to the outside of the part to perform the cutting. In addition, the upper die 30 can also be provided with a pressure plate 34. During clamping of the upper die 30 and the lower die 20, the pressure plate 24 is used to compress a workpiece, such as the front lower control arm 40. Here, the width of the mounting space B (i.e., a space enclosed between the female die taper wedge mechanism 22 and the male die taper wedge mechanism 24) is equivalent to the minimum distance between the female die taper wedge mechanism 22 and the male die taper wedge mechanism 24, which must be greater than 70 mm before trimming (i.e., both the female die taper wedge mechanism 22 and the male die taper wedge mechanism 24 have a stroke of 0), to ensure that the front lower control arm 40 can be inserted and removed normally. During trimming (i.e., both the female die taper wedge mechanism 22 and the male die taper wedge mechanism 24 reach their maximum stroke), the minimum distance between the female die taper wedge mechanism 22 and the male die taper wedge mechanism 24 must be greater than or equal to 20 mm. Fig. 7 is a first perspective view of a female die taper wedge mechanism in the trimming and punching die for a C port of the front lower control arm of the present invention. Fig. 8 is a second perspective view of the female die conical wedge mechanism in the trimming and punching die for a C port of the front lower control arm of the present invention. As shown in Figures 7 and 8, preferably, two ends of one side of the female die taper wedge mechanism 22 are respectively provided with at least a first driving surface 222 that is oblique, the female die drive block 32 and the first driving surface 222 coincide with each other, and the female die taper wedge mechanism 22 is moved by a thrust force between the female die drive block 21 and the first driving surface 222. Preferably, the first driving surfaces 222 are located on two sides of the recess 221. In particular, the recess 221 in the present has a greater width than the second part of arm 42, and gaps are left between the surfaces of the inner walls of the side parts of the recess 221 and the second part of arm 42. In other words, the recess 221 must be larger than the part (for example, greater than 200 mm), and it can completely encompass the part and completely prevent it from making contact with the workpiece during movement. Here, the workpiece is a front lower control arm, for example. The female die 22 conical wedge mechanism is structurally configured to pass through the workpiece because, due to the workpiece's shape limitations, it is impossible to accommodate a sufficiently large structure on the same side of the workpiece. Therefore, the conical wedge mechanism of the female die 22, which extends from the workpiece, is an important component of the method for trimming a C-port. Furthermore, the base of the lower die 21 is provided with at least one guide rail 25, a lower end of the tapered wedge mechanism of the female die 22 is provided with at least one sliding groove of the guide rail 223, and the tapered wedge mechanism of the female die 22 is mounted on the guide rail 25 via the sliding groove of the guide rail 223. This tapered wedge mechanism of the female die 22 can only move in the directions defined by the guide rail 25 (e.g., the directions MA / a / ZUZ J / UUl DO (indicated by the arrows shown in Figure 7), with movement restricted in other directions, and the error is less than 0.05 mm. Similarly, the male die taper wedge mechanism 24 can also be slidably connected to the lower die base 21 via the guide rail. Furthermore, a wall surface of the female die tapered wedge mechanism 22 facing the first arm portion 41 of the front lower control arm 40 is provided with a female trim groove 224, and the female trim groove 224 matches the shape of the first arm portion 41 and is configured to allow the first arm portion 41 to be in a fixed position. As shown in Figures 5 and 6, preferably, an outer side surface of the male die conical wedge mechanism 24 is provided with at least a second driving surface 241 that is oblique, the female die driving block 33 and the second driving surface 241 coincide with each other, and the male die conical wedge mechanism 24 is moved by a thrust force between the male die driving block 33 and the second driving surface 241. Figure 9 is a perspective view of a male trimming die in the trimming and punching die for a C port of the front lower control arm of the present invention. As shown in Fig. 9, the male trimming die 23 preferably comprises a base body 231 and an edge portion 232, the edge portion 232 being mounted onto the base body 231 by additive manufacturing. An end portion of the edge portion 232 preferably has an arc surface. Specifically, since the design space of the male trimming die 23 is strictly limited, it is also necessary to ensure that the trimming edge has sufficient hardness while ensuring that the male die has sufficient toughness. Therefore, the male trimming die 23 is manufactured using additive manufacturing. The edge portion 232 of the male trimming die 23 is made of a special material, and the region of this material in contact with a workpiece is made of a 3D-printed high-strength alloy bonded to the base body 231, which has good toughness. This not only ensures the shear resistance of the trimming edge but also guarantees sufficient hardness, significantly extending the service life of the male trimming die. At the joint between the edge portion 232 and the base body 231, the joint line 233 is a quadratic curve, ensuring the reliability of the joint's operation. The rim portion 232 is preferably made of tungsten carbide, a titanium alloy, a titanium-based composite material, an iron-based composite material, or a metal-based ceramic material, and is attached to the base body 231 based on 3D laser printing technology. The front lower control arm, made of high-strength steel, is used in many different vehicle models. This cutting method can simplify the C-port cutting process and improve production efficiency. The application of new materials can effectively reduce die maintenance costs while also achieving good dimensions and appearance. Fig. 10 is a schematic diagram of the cutting and punching die for a C port of the front lower control arm of the present invention in a state of use. As shown in Fig. 10, in the trimming and punching die for processing a port C of the present invention, a female die conical wedge mechanism is used. By means of the conical wedge structure, the female die conical wedge mechanism passes through the underside of the workpiece. This structure solves the problem of insufficient space on the left side of port C 43 for accommodating a conical wedge. During the trimming of port C 43, the female trimming die 224 is pushed by the female die conical wedge structure 22 to move to the right in the direction indicated by the arrow shown in Fig. 7 to compress port C 41. The male trimming die 23 then moves to the left in the direction indicated by the arrow shown in Fig. 7 to perform the trimming, and after trimming, the male trimming die 23 moves to the right to retract.The female trimming die 224 is driven by the tapered wedge structure of the female die 22 to move backward and complete the trimming of port C 43. MA / a / ZUZ J / UUl DO í The trimming and punching die for a C-port on a front lower control arm ensures that the C-port can be processed in a single cut, improving both the dimensional accuracy and trimming efficiency. The C-port trimmed and punched with this die is free of burrs and scuffs and remains consistent with a digital model. In conclusion, the trimming and punching die for a C-port of a front lower control arm of the present invention can ensure that the C-port can be processed with only one cut, which not only improves the dimensional accuracy of the C-port but also enhances trimming efficiency. The C-port trimmed with the trimming and punching die is burr-free and consistent with a digital model. Furthermore, the use of new materials for the cutting and punching die can effectively reduce the cost of maintaining the die and also achieve a good dimension and appearance. Fig. 11 is a flowchart of a trimming method for a C-port of the front lower control arm of the present invention. As shown in Fig. 11, the present invention further discloses a trimming method for a C-port of a front lower control arm, the trimming method using the trimming die for a C-port of a front lower control arm mentioned above, the trimming method comprises the following steps. In step Si, a front lower control arm 40 to be processed having a port C is placed in the lower die 20 of the trimming and punching die, with a first arm portion 41, having ports C 43, of the front lower control arm 40 located in a mounting space B between the female die taper wedge mechanism 22 and the male die taper wedge mechanism 24 of the lower die 20, so that the front lower control arm 40 is mounted through the female die taper wedge mechanism 22. ML / a / ZUZ J / UUl DO í the distance between the female die conical wedge mechanism 22 and the male die conical wedge mechanism 24 is greater than 70 mm before trimming. In step S2, a press moves down to allow an upper die 30 of the trimming and punching die to move down together to compress the front lower control arm 40. Preferably, step S2 may also specifically comprise: allowing the pressure plate 34 of the upper die 30 to come into contact with the front lower control arm 40 and compress the front lower control arm 40. In this mode, the pressure of the 210 pressure plate is preferably 12t. In step S3, the female die drive block 32 of the upper die 30 is in contact and cooperates with the female die taper wedge mechanism 22 in the lower die 20, and the female die taper wedge mechanism 22 is driven to slide close and compress the first part of the arm 41, which has the C ports 43, of the front lower control arm 40. Preferably, step S3 can also specifically include: S31, allowing a driving surface of the female die drive block 32 and a driving surface of the female die taper wedge mechanism 22 to come into contact and slide against each other, so that the female die taper wedge mechanism 22 slides along a guide rail 25 of the lower die 20 (which moves to the right in the direction indicated by the arrow shown in Figure 10); and S32, allow a female trim groove 224 of the female die taper wedge mechanism 22 to fit snugly into port C 43 and continue applying pressure. More specifically, the female trimming die 224 is pressed by the tapered wedge mechanism of the female die 22 to move to the right in the direction indicated by the arrow shown in Figure 10, and when the tapered wedge mechanism of the female die 224 reaches its maximum stroke, the female trimming die 224 fits snugly into port C 43 and maintains a certain pressure. ML / a / ZUZ J / UUl DO í In step S4, the male die drive block 33 of the upper die 30 is in contact and cooperates with the male die taper wedge mechanism 24 in the lower die 20, the male die taper wedge mechanism 24 is driven to slide close to the front lower control arm 40, and the C port 43 is trimmed by means of the male trimming die 23 provided in the male die taper wedge mechanism 24. Preferably, step S4 may also specifically include: S4i, allowing a driving surface of the male die drive block 33 and a driving surface of the male die taper wedge mechanism 24 to come into contact and slide against each other, so that the male die taper wedge mechanism 24 slides close to port C 43 (moving to the left in the direction indicated by the arrow shown in Figure 10); and S42, mount the male trimming die 23 on the tapered wedge mechanism of the male die 24 and trim port C 43 by means of the male trimming die 23 together with the movement of the tapered wedge mechanism of the male die 24. When the male die's tapered wedge structure reaches its maximum stroke, the C 43 position cutout is complete. The distance between the female die conical wedge mechanism 22 and the male die conical wedge mechanism 24 is greater than or equal to 20 mm during trimming. In step Ss, the press moves upwards to allow the upper die 30 to separate from the lower die 20, and the front lower control arm 40 is pulled out. Preferably, step S5 can also specifically include: S51, 24 move the press upwards to allow the driving surface of the male die drive block 33 to separate from the driving surface of the male die taper wedge mechanism 24, so that the male die taper wedge mechanism 24 returns to an initial assembly position (i.e., the position where the stroke of the male die taper wedge mechanism 24 is 0) under the action of its own force source; ML / a / ZUZ J / UUl DO í Ss2, separate the driving surface of the female die drive block 32 from the driving surface of the female die taper wedge mechanism 22, so that the female die taper wedge mechanism 22 recoils to an initial assembly position (i.e., the position where the stroke of the female die taper wedge mechanism 22 is 0) under the action of its own force source, at this time, the female trim groove 224 separating from the front lower control arm 40; and S53, separate the pressure plate 34 from the upper die 30 of the front lower control arm 40 and remove the front lower control arm 40 from the cutting and punching die. Additionally, preferably the edge portion of the male trimming die 23 is made of tungsten carbide, a titanium alloy, a titanium-based composite material, an iron-based composite material, or a metal-based ceramic material. The trimming method for processing a C-port of the present invention ensures that the C-port can be processed with only one trimming procedure, which not only improves the dimensional accuracy of the C-port but also enhances trimming efficiency. Using this trimming method, the C-port, after trimming and drilling, is free of burrs and nicks and remains consistent with the digital model. Although specific implementations of the present invention have been described above, those skilled in the art should understand that these are merely examples, and that the scope of protection for the present invention is defined by the appended claims. Those skilled in the art may make various alterations or modifications to these implementations without departing from the principle and substance of the present invention. However, all such alterations and modifications fall within the scope of protection of the present invention. ML / a / ZUZ J / UUl DO í NOVELTY OF THE INVENTION Having described the present invention as above, the following is considered novel and, therefore, is claimed as property:
Claims
1. A trimming and punching die for a port C of a front lower control arm, the trimming and punching die comprising a lower die and an upper die, wherein the lower die comprises a lower die base, a female die taper wedge mechanism, a male trimming die, and a male die taper wedge mechanism, the female die taper wedge mechanism and the male die taper wedge mechanism being slidably mounted on the lower die base, a mounting space being formed between the female die taper wedge mechanism and the male die taper wedge mechanism, a first arm portion of a front lower control arm to be processed being mounted in the mounting space, the male trimming die being mounted on an inner wall surface of the male die taper wedge mechanism, and the male trimming die being inserted into a port C of the first arm portion;an upper portion of the female die taper wedge mechanism is provided with a recess, and a second portion of the front lower control arm is mounted in the recess so that the front lower control arm is mounted through the female die taper wedge mechanism;and the upper die comprises an upper die base, a female die drive block, and a male die drive block, and when the upper die and the lower die match each other and hold the die, the female die drive block cooperates with the female die conical wedge mechanism to drive the female die conical wedge mechanism to move, and the male die drive block cooperates with the male die conical wedge mechanism to drive the male die conical wedge mechanism to move, so that the male die trims the C port of the front lower control arm from the inside out.
2. The trimming and punching die for a port C of a front lower control arm according to claim 1, wherein two ends of one side of the female die conical wedge mechanism are respectively provided with at least a first driving surface that is oblique, the female die driving block and the first driving surface coincide with each other, and the female die conical wedge mechanism is moved by a thrust force between the female die driving block and the first driving surface.
3. The cutting and punching die for a port C of a front lower control arm according to claim 2, wherein the first driving surfaces are located on two sides of the recess.
4. The cutting and punching die for a port C of a front lower control arm according to claim 3, wherein the recess has a greater width than the second part of the arm, and gaps are left between the surfaces of the inner walls of the side parts of the recess and the second part of the arm.
5. The trimming and punching die for a port C of a front lower control arm according to claim 1, wherein the base of the lower die is provided with at least one guide rail, a lower end of the female die's tapered wedge mechanism is provided with at least one guide rail sliding groove, and the female die's tapered wedge mechanism is mounted on the guide rail via the guide rail sliding groove.
6. The cutting and punching die for a port C of a front lower control arm according to claim 2, wherein a wall surface of the female die tapered wedge mechanism facing the first arm part is provided with a female cutting groove matching the shape of the first arm part and configured to allow the first arm part to be fitted into a fixed position.
7. The die for cutting and punching a port C of a front lower control arm according to claim 1, wherein an outer side surface of the male die's conical wedge mechanism is provided with at least a second oblique driving surface, the female die's driving block and the second driving surface coincide with each other, and the male die's conical wedge mechanism is moved by a thrust force between the male die's driving block and the second driving surface.
8. The trimming and punching die for a port C of a front lower control arm according to claim 1, wherein the male trimming die comprises a base body and an edge portion, the edge portion being mounted onto the base body by additive manufacturing.
9. The cutting and punching die for a C-port of a front lower control arm according to claim 8, wherein an end portion of the edge portion has an arc surface.
10. The cutting and punching die for a C-port of a front lower control arm according to claim 9, wherein the edge portion is made of tungsten carbide, a titanium alloy, a titanium-based composite material, an iron-based composite material, or a metal-based ceramic material.
11. A method of trimming a port C of a front lower control arm, wherein in the trimming method, the trimming and punching die for a port C of a front lower control arm according to any of claims 1-10 used, the trimming method comprises the following steps: If, placing a front lower control arm to be processed having a port C in a lower die of a trimming and punching die, with a first arm portion, having the port C, of the front lower control arm being in a mounting space between a female die taper wedge mechanism and a male die taper wedge mechanism of the lower die, and a second portion of the front lower control arm being mounted in a recess of the female die taper wedge mechanism, such that the front lower control arm is mounted through the female die taper wedge mechanism;S2, moving a press downwards to allow an upper die of the trimming and punching die to move downwards as a whole to compress the front lower control arm; S3, allowing a female die drive block of the upper die to contact and cooperate with the female die taper wedge mechanism in the lower die to drive the female die taper wedge mechanism to slide close to and compress the first part of the arm, which has port C, of the front lower control arm; S4, allowing a male die drive block of the upper die to contact and cooperate with the male die taper wedge mechanism in the lower die to drive the male die taper wedge mechanism to slide close to the front lower control arm, and trim port C by means of the male trimming die provided in the male die taper wedge mechanism;and S5, move the press upwards to allow the upper die to separate from the lower die, and pull out the front lower control arm.; 12. The trimming method for a port C of a front lower control arm according to claim 11, wherein step S2 specifically comprises: allowing a pressure plate of the upper die to come into contact with the front lower control arm and compress the front lower control arm.
13. The trimming method for a port C of a front lower control arm according to claim 12, wherein the pressure from the pressure plate is 12t.
14. The trimming method for a port C of a front lower control arm according to claim 11, wherein step S3 specifically comprises: S31, allowing a driving surface of the female die drive block and a driving surface of the female die taper wedge mechanism to contact and slide against each other, such that the female die taper wedge mechanism slides along a guide rail of the lower die; and S32, allowing a female trimming groove of the female die taper wedge mechanism to fit snugly against port C and continue applying pressure. MA.a.ZUZ J / UUl DO í 15. The trimming method for a port C of a front lower control arm according to claim 11, wherein step S4 specifically comprises: S41, allowing a driving surface of the male die drive block and a driving surface of the male die taper wedge mechanism to come into contact and slide against each other, so that the male die taper wedge mechanism slides close to a port C; and S42, mounting the male trimming die on the male die taper wedge mechanism and trimming port C by means of the male trimming die together with the movement of the male die taper wedge mechanism.
16. The method of trimming a port C of a front lower control arm according to claim 11, wherein step S5 specifically comprises: S51, moving the press upwards to allow the driving surface of the male die drive block to separate from the driving surface of the male die taper wedge mechanism, so that the male die taper wedge mechanism retracts to an initial mounting position under the action of its own force source; S52, separating the driving surface of the male die drive block from the driving surface of the female die taper wedge mechanism, so that the female die taper wedge mechanism retracts to an initial mounting position under the action of its own force source; and S53, separating the upper die pressure plate from the front lower control arm and removing the front lower control arm from the cutting and punching die.
17. The trimming method for a port C of a front lower control arm according to claim 11, wherein the distance between the female die taper wedge mechanism and the male die taper wedge mechanism at step Si is greater than 70 mm before trimming.
18. The trimming method for a port C of a front lower control arm according to claim 11, wherein the distance between the female die taper wedge mechanism and the male die taper wedge mechanism at step S4 is greater than or equal to 20 mm during trimming.