Fender and forming die thereof

Abstract

The front end of the upper portion, located between a headlamp and a cabin cover, of the fender is an angular plate face, and the upper edge and / or the lower edge of the angular plate face are / is provided with turned-over edges located in a cabin. The fender forming die comprises a male die used for forming the inner side plate face of the angular plate face, the edge of the top face of the male die abuts against the inner side face of the lower turned-over edge and the inner side face of the upper turned-over edge, the bottom of the male die is connected with a sliding wedge block, and a first section of motion of the male die is decomposed into first component motion facing the rear end of a fender and second component motion far away from the back face of the fender. The turnup edges are formed on the upper edge and the lower edge of the angular plate face, so that the strength of the parts is improved. According to the forming die, the flanges are formed through the male die, the first section of the male die moves so that the male die can avoid the flanges on the upper edge and the lower edge of the angular plate, then the fender can be conveniently taken away, and demolding can be conducted smoothly without other procedures.

Description

Technical Field

[0001] The invention relates to the technical field of automobile moulds, and in particular to a fender and a forming mould of the fender. Background Art

[0002] The fender of a car is an outer panel of the car body located above the wheel, and is named because of its shape and position that resembles a bird's wing. Some models design the front fender above the front wheel into a narrow and long shape, which is matched with the eagle-eye headlight group on the front side to form an appearance with a strong visual impact. However, a "U" or "V" shaped missing part A' is reserved at the front end of the fender to accommodate the corner of the headlight, that is, the corner of the headlight extends to the side of the car body to meet the requirements of styling or arranging turn signals. The upper edge contour A1 of the missing part A' and the upper edge A2 of the fender are surrounded by an angular panel surface A3.

[0003] Since the sharp corner of the fender near the upper side of the headlight is suspended in the whole vehicle, the narrow and long shape of the fender will lead to insufficient strength of this part, and its overall rigidity cannot meet the requirements. To solve this problem, the following solution is generally adopted in the prior art: adding reinforcement parts on the inner side of the sharp corner of the fender, and the two are fixed with glue to enhance the rigidity of the sharp corner of the fender. However, this solution increases the manufacturing cost, and the temperature expansion coefficient of the adhesive and the sheet metal are different, and the strength of the reinforcement parts is much greater than that of the sharp corner of the fender. These factors will increase the matching gap between the fender and the headlight and the outer panel of the hood, affecting the aesthetic appearance of the whole vehicle. Summary of the invention

[0004] The purpose of the present invention is to provide a fender and a molding die thereof, so as to improve the strength of the front end sharp corner portion of the upper portion of the fender and enable the workpiece to be smoothly demolded during the flanging molding of the sharp corner portion of the fender.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A fender, located between a headlight and a cabin cover, has an upper front end of an angular plate surface with a corner tip extending toward the front of the vehicle, and an upper edge and / or a lower edge of the angular plate surface is provided with a flange located in the cabin.

[0007] A fender forming mold includes a punch for forming the inner panel surface of an angled panel surface, the top surface of the punch abuts against the back surface of the angled panel surface and its top surface is consistent with the designed surface shape of the angled panel surface, the top surface edge of the punch abuts against the inner side surfaces of a lower flange and an upper flange respectively, and a sliding wedge is connected to the bottom of the punch. The first section of movement of the punch relative to the fender is decomposed into a first sub-movement toward the rear end of the fender and a second sub-movement away from the back surface of the fender, and the combined movement of the two constitutes the actual movement of the punch and the sliding wedge.

[0008] The present invention mainly forms flanges at the upper and lower edges of the angled plate surface at the front end of the upper part of the fender, so as to improve the strength of the angled plate surface. The forming mold forms the flanges through a convex mold, and the first stage movement of the convex mold relative to the fender makes the convex mold avoid the flanges at the upper and lower edges of the angled plate surface, and then the fender can be removed by a robot, and the demoulding can be smoothly carried out without adding other processes, and the operation is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 , 2 They are the isometric view and bottom view of the fender respectively;

[0010] Figure 3 for Figure 2 Sectional view at the middle BB;

[0011] Figure 4 for Figure 2 A partial enlarged view of the cross section at the middle BB;

[0012] Figure 5 , 6 They are schematic diagrams of the cooperation between the fender and the forming mold;

[0013] Figure 7 , 9 They are schematic diagrams of the cooperation between the punch and the fender respectively;

[0014] Figure 8 It is an isometric view of the punch;

[0015] Fig.10 , 11 1 and 12 are isometric views of the forming die when the punch is at the starting point and end point of the first stage of movement and the end point of the second stage of movement respectively;

[0016] Fig.13 for Fig.10 Cross-section at mid-MM;

[0017] Fig.14 Isometric view of the forming die after removing the sliding wedges;

[0018] Fig.15 for Fig.14 A partial enlarged view of

[0019] Fig.16 This is a schematic diagram of the molding die after removing the sliding seat. DETAILED DESCRIPTION

[0020] See also Figures 1 to 4The fender shown in the figure has an upper front end of the fender A between the headlight and the engine compartment cover, which is an angled panel A3 with the corner tip extending toward the front of the vehicle, and an upper edge A2 and / or a lower edge A1 of the angled panel A3 with a flange located inside the engine compartment. The above scheme can also be understood as the front side of the fender facing the outside of the vehicle body and the panel facing the inside of the engine compartment is called the back side, so the flange is set at the edge of the back side of the angled panel A3. In the prior art, the angled panel A3 of the fender A is suspended, and the narrow and long shape of the angled panel A3 will lead to insufficient strength of this part, while the flanges of the upper edge A2 and the lower edge A1 located inside the engine compartment in the present scheme increase the installation points of the fender A between the angled panel A3 and the headlight and the engine compartment cover, thereby enhancing the strength of the angled panel A3, and at the same time the profile posture of the angled panel A3 is kept stable.

[0021] The preferred solution is that the angle between the upper flange A21 at the upper edge A2 of the angled panel surface A3, the lower flange A11 at the lower edge A1 and the angled panel surface A3 at the intersection is an acute angle. The angled panel surface A3 of the fender A is an arc-shaped surface, and the angle at the intersection in the above solution refers to the angle between the section of the arc-shaped angled panel surface A3 at its upper edge A2 and lower edge A1 and the surface where the upper flange A21 and the lower flange A11 are located. Since the space where the angled panel surface A3 is located is relatively narrow, in order to reserve the installation position of the headlight and the cabin cover, the above angle is designed to be an acute angle.

[0022] Preferably, the lower flange A11 is arranged on the upper edge of the lower edge A1 of the angular profile missing portion A' of the fender A that accommodates the headlight. It should be noted that the upper and lower position definitions in the above description refer to the orientation relationship on the fender in the actual vehicle state. During installation, the lower flange A11 is connected to the top of the headlight, and the above arrangement makes it easier to select the installation point between the two.

[0023] As another implementation scheme, in order to reduce the difficulty of flange forming, the front ends of the upper flange A21 and the lower flange A11 are arranged intermittently, which solves the problem that the continuous flange will inevitably fold and cause the finishing part of the angle panel A3 to warp.

[0024] Under the premise of not affecting the forming of the fender A, the lengths of the upper flange A21 and the lower flange A11 of the angular panel surface A3 are increased and mounting points are added at the flanges. The dimensional accuracy between the fender A and the surrounding sheet metal parts is also easy to control, and the investment required is also less. In addition, the lower flange A11 can be connected to the housing of the headlight, thereby improving the surface difference accuracy between the angular panel surface A3 and the headlight and obtaining a uniform gap between the lower flange A11 and the headlight.

[0025] like Figure 2 , 3As shown in Figures 4 and 5, due to the existence of the upper flange A21 and the lower flange A11, the demolding path of the working punch in the traditional mold structure will be blocked by the upper flange A21 and the lower flange A11 that are arranged continuously or at intervals, and the workpiece cannot be demolded normally. Therefore, a corresponding new mold structure is essential.

[0026] See also Figures 5 to 16 The fender forming mold shown includes a punch 10 for forming the inner panel surface of the angled panel surface A3. The top surface of the punch 10 abuts against the back of the angled panel surface A3 and its top surface is consistent with the design surface shape of the angled panel surface A3. The top edge of the punch 10 abuts against the inner side surfaces of the lower flange A11 and the upper flange A21 respectively. The bottom of the punch 10 is connected with a sliding wedge 20. The first section of the movement of the punch 10 relative to the fender A defined by the sliding wedge 20 includes a first sub-movement toward the rear end of the fender A and a second sub-movement away from the back of the fender A. The combined movement of the first sub-movement and the second sub-movement constitutes the movement displacement path of the punch 10. In the above scheme, regarding the movement direction of the sliding wedge 20, when forming the fender A, the arrangement of the punch at the bottom and the die at the top is adopted. During the forming, the panel surface of the fender A is placed flat as a whole between the punch and the die. The side where the missing part A' of the fender A is located is defined as the front end of the fender A, and the side adjacent to the engine compartment when the fender A is installed is defined as the upper end of the fender A. The first stage of the movement of the punch 10 relative to the fender A makes the punch 10 avoid the flanges at the upper edge A2 and the lower edge A1 of the angular plate surface A3. Since the angles at the intersection of the upper flange A21 at the upper edge A2 and the lower flange A11 at the lower edge A1 with the angular plate surface A3 are acute angles, the angle and distance of the first stage of the movement of the punch 10 need to be set according to the angle and length of the flanges. Only after the above movement is completed can the robot arm be used to remove the fender A, and demolding can be successfully performed without the need for additional processes.

[0027] In order to facilitate the demoulding of fender A, Figure 6 , Fig.10 As shown, the movement of the punch 10 relative to the fender A is a first section movement and a second section movement connected front and back. The second section movement of the punch 10 is toward the lower end of the fender A, and the end point of the first section movement path constitutes the starting point of the second section movement path. In the actual production process, the first section movement of the punch 10 relative to the fender A forms an acute angle with the horizontal plane, that is, the first sub-movement of the punch 10 toward the rear end of the fender A is in the horizontal direction, and the second sub-movement away from the back of the fender A is in the vertical downward direction. The second section movement of the punch 10 relative to the fender A is in the horizontal direction and is perpendicular to the first sub-movement direction of the first section movement. The two sections of movement of the punch 10 are connected in a continuous manner, and its second section movement path avoids the lower flange A11 and the upper flange A21.

[0028] In a more specific solution, the sliding wedge block 20 is arranged on the inclined wedge seat 30, and the inclined wedge seat 30 is installed on the base 40. The sliding cooperation between the sliding wedge block 20 and the inclined wedge seat 30 constitutes the first stage of movement of the punch 10, and the sliding cooperation between the inclined wedge seat 30 and the base 40 constitutes the second stage of movement of the punch 10. In the above solution, the sliding wedge block 20 is installed on the inclined wedge surface of the inclined wedge seat 30, and its inclined wedge surface is parallel to the first stage of movement direction of the punch 10. The sliding wedge block 20 is fixedly connected to the punch 10, so the movement direction of the punch 10 is consistent with the sliding wedge block 20. The inclined wedge seat 30 moves in the horizontal direction on the base 40. When the inclined wedge seat 30 moves, the position of the sliding wedge block 20 relative to the inclined wedge seat 30 remains unchanged, so the movement direction of the inclined wedge seat 30 is also consistent with the movement direction of the punch 10. In actual application, the base 40 is installed on the lower mold for producing the fender A, and the punch 10 and the fender A are both located between the upper mold and the lower mold. The upper mold and the lower mold of the present invention are not shown in the figure.

[0029] Preferably, the inclined wedge seat 30 is in a wedge-shaped block shape, and a groove 31 for mounting the sliding wedge block 20 is provided on its wedge surface, and a groove bottom surface 312 of the groove 31 constitutes a supporting surface for the sliding wedge block 20 to slide relative to the inclined wedge seat 30 .

[0030] A guide rail 32 with a trapezoidal or angular cross section is provided on the bottom surface of the groove 31 of the inclined wedge seat 30, and a sliding seat 21 matching the trapezoidal or angular inclined surface of the guide rail 32 is provided at the bottom of the sliding wedge block 20, and the extension direction of the limiting surface of the guide rail 32 constitutes the motion displacement path of the first stage of the movement of the punch 10. The trapezoidal or angular guide rail 32 limits the movement direction of the sliding wedge block 20 to be consistent with the length direction of the guide rail 32.

[0031] In order to reduce the movement friction between the sliding wedge 20 and the inclined wedge seat 30, support plates 34 are provided on both sides of the guide rails 32 of the groove bottom surface 312 of the groove 31 to support the sliding of the sliding wedge 20. The length direction of the support plate 34 is consistent with the direction of the first segment movement of the punch 10. A first stop block 35 is installed on the groove end wall at the top of the groove 31. The position where the first stop block 35 abuts against the sliding wedge 20 is the starting position of the movement path of the sliding wedge 20. The first stop block 35 in the above scheme can easily determine the movement starting point of the sliding wedge 20 and improve the position accuracy of the sliding wedge 20.

[0032] In order to limit the sliding wedge block 20 from sliding along the guide rail 32, the upper wall edges 311 of the groove walls on both sides of the groove 31 are provided with limit plates 33 extending from the plate edges to the groove openings of the groove cavity. The limit plates 33 and the sliding wedge block 20 form a limit fit perpendicular to the wedge surface direction of the inclined wedge seat 30.

[0033] Preferably, the base 40 is provided with a cavity 41 for mounting the inclined wedge seat 30, the bottom surface 411 of the cavity 41 is provided with a guide rail 42 that is slidably matched with the inclined wedge seat 30 and a pad 44 that is arranged to avoid the guide rail 42, the length direction of the guide rail 42 is consistent with the direction of the second segment movement of the punch 10, the cross section of the guide rail 42 is trapezoidal or angular, the bottom of the inclined wedge seat 30 is provided with a guide seat 46 that matches the trapezoidal slope or angular slope of the guide rail 42, the top 412 of the inner wall on both sides of the cavity 41 along the second segment movement direction is provided with a second limiting plate 43 whose plate edge extends toward the cavity mouth of the cavity 41, and the second limiting plate 43 and the inclined wedge seat 30 form a limiting match perpendicular to the bottom surface 411 of the cavity 41. The limiting plate 33, the second limiting plate 43 and the base 40 are all detachably connected, and the cavity 41 and the second limiting plate 43 jointly define the movement path of the inclined wedge seat 30.

[0034] like Fig.16 As shown, a cylinder 50 for driving the wedge seat 30 is provided on the base 40, and the extension direction of the cylinder 50 is consistent with the direction of the second stage movement of the punch 10, and a second stop block 45 is installed on the inner wall of the cavity 41 at both ends of the movement path of the wedge seat 30. The second stop block 45 defines the starting point and the end point of the movement of the wedge seat 30 on the base 40.

[0035] The overall working process of the fender forming mold is as follows: after the fender A is placed in the mold and the preparation stage is completed, the upper mold moves downward, the air circuit starts to work, the cylinder 50 pushes the inclined wedge seat 30 to move the punch 10 to the starting position of the second stage of movement, the upper mold continues to move downward under the drive of the press, drives the sliding wedge block 20 to move the punch 10 to the starting position of the first stage of movement, at this time the punch 10 and the fender A plate are reshaped. The upper mold continues to move downward, the press plate installed on the upper mold applies pressure to the punch 10, and then the molding knife block of the mold completes the molding of the upper flange A21 and the lower flange A11.

[0036] After the above forming process is completed, the pressing plate of the upper die is separated from the stamping part, and the press drives the upper die to continue to move upward. The sliding wedge block 20 is driven by the nitrogen spring to move the punch 10, so that the punch 10 moves from the starting point of the first stage of movement to the end point of the first stage of movement. At this time, the forming surface at the top of the punch 10 avoids the upper flange A21 and the lower flange A11. The mold continues to move upward, and under the influence of the electronic cam, the air circuit starts to work, and the cylinder 50 drives the inclined wedge seat 30 to move along the guide rail 42, so that the punch 10 moves from the starting point of the second stage of movement to the end point of the second stage of movement, so that the punch 10 avoids the plate edge A4 extending from the top of the fender A toward the back of itself. At this point, the punch 10 and the fender A are completely avoided, and the fender A can be directly taken away by the robot, and the whole process is completed.

Claims

1. A fender, characterized in that: The front end of the upper part of the fender (A) between the headlight and the engine cover is an angular plate surface (A3) with the corner tip extending toward the front of the vehicle, and the upper edge (A2) and / or the lower edge (A1) of the angular plate surface (A3) is provided with a flange located inside the engine cover.

2. The fender according to claim 1, characterized in that: The angles at the intersections of the upper flange (A21) at the upper edge (A2) of the angled plate surface (A3), the lower flange (A11) at the lower edge (A1) and the angled plate surface (A3) are acute angles.

3. The fender according to claim 2, characterized in that: The front ends of the upper flange (A21) and the lower flange (A11) are arranged discontinuously.

4. The fender according to claim 2 or 3, characterized in that: The lower flange (A11) is arranged on the upper edge of the angular contour missing portion A' of the fender (A) for accommodating the headlight, which constitutes the lower edge (A1).

5. A fender forming die according to claims 1 to 4, characterized in that: The invention comprises a punch (10) for forming the inner side panel surface of an angled panel surface (A3); the top surface of the punch (10) abuts against the back side of the angled panel surface (A3) and its top surface is consistent with the design surface shape of the angled panel surface (A3); the top surface edge of the punch (10) abuts against the inner side surfaces of a lower flange (A11) and an upper flange (A21), respectively; the bottom of the punch (10) is connected with a sliding wedge (20); the first section of movement of the punch (10) relative to the fender (A) defined by the sliding wedge (20) comprises a first sub-movement toward the rear end of the fender (A) and a second sub-movement away from the back side of the fender (A); the combined movement of the first sub-movement and the second sub-movement constitutes the movement displacement path of the punch (10).

6. The fender forming mold according to claim 5, characterized in that: The movement of the punch (10) relative to the fender (A) is a first movement and a second movement connected front and back, the second movement of the punch (10) is toward the lower end of the fender (A), and the end point of the first movement path constitutes the starting point of the second movement path.

7. The fender forming mold according to claim 6, characterized in that: The sliding wedge block (20) is arranged on the inclined wedge seat (30), and the inclined wedge seat (30) is installed on the base (40). The sliding cooperation between the sliding wedge block (20) and the inclined wedge seat (30) constitutes the first stage movement of the punch (10), and the sliding cooperation between the inclined wedge seat (30) and the base (40) constitutes the second stage movement of the punch (10).

8. The fender forming mold according to claim 7, characterized in that: The inclined wedge seat (30) is in the shape of a wedge block, and a groove (31) for mounting the sliding wedge block (20) is provided on its wedge surface, and the groove bottom surface (312) of the groove (31) constitutes a support surface for the sliding wedge block (20) to slide relative to the inclined wedge seat (30).

9. The fender forming mold according to claim 8, characterized in that: A guide rail (32) having a trapezoidal or angular cross section is provided on the bottom surface of the groove (31) of the inclined wedge seat (30), and a sliding seat (21) matching the trapezoidal inclined surface or the angular inclined surface of the guide rail (32) is provided at the bottom of the sliding wedge block (20), and the extension direction of the limiting surface of the guide rail (32) constitutes the movement displacement path of the first stage movement of the punch (10).

10. The fender forming mold according to claim 8, characterized in that: The upper wall edges (311) of the groove walls on both sides of the groove (31) are provided with limit plates (33) extending from the plate edges to the groove openings of the groove cavity, and the limit plates (33) and the sliding wedge block (20) form a limit fit perpendicular to the wedge surface direction of the inclined wedge seat (30).

11. The fender forming mold according to claim 9, characterized in that: Support plates (34) for supporting the sliding wedge block (20) are provided on both sides of the guide rail (32) of the groove bottom surface (312) of the groove (31), and the length direction of the support plate (34) is consistent with the direction of the first section movement of the punch (10). A first limit block (35) is installed on the groove end wall at the top of the groove (31), and the abutment position of the first limit block (35) and the sliding wedge block (20) is the starting position of the movement path of the sliding wedge block (20).

12. The fender forming mold according to claim 7, characterized in that: A concave cavity (41) for mounting an inclined wedge seat (30) is provided on the base (40), a guide rail (42) slidably matched with the inclined wedge seat (30) and a pad (44) arranged to avoid the guide rail (42) are provided on the bottom surface (411) of the concave cavity (41), the length direction of the guide rail (42) is consistent with the direction of the second section movement of the punch (10), the cross section of the guide rail (42) is trapezoidal or angular, a guide seat (46) matching with the trapezoidal inclined surface or angular inclined surface of the guide rail (42) is provided at the bottom of the inclined wedge seat (30), and a second limiting plate (43) extending from the plate edge to the concave cavity mouth of the concave cavity (41) is provided at the top (412) of the inner walls on both sides of the concave cavity (41) along the second section movement direction, and the second limiting plate (43) and the inclined wedge seat (30) form a limiting match perpendicular to the bottom surface (411) of the concave cavity (41).

13. The fender forming mold according to claim 12, characterized in that: A cylinder (50) for driving the inclined wedge seat (30) is provided on the base (40), and the extension direction of the cylinder (50) is consistent with the direction of the second stage movement of the punch (10). Second limit blocks (45) are installed on the inner walls of the cavity (41) at both ends of the movement path of the inclined wedge seat (30).

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