Machining method of automobile pivoted window guide rail

Abstract

The invention relates to a machining method of an automobile pivoted window guide rail, a lower die comprises a lower die core and at least one riveting assembly, and each riveting assembly comprises two riveting blocks and an elastic piece. The machining method of the automobile pivoted window guide rail comprises the steps that a riveting screw part penetrates out of a mounting hole of a pivoted window sheet metal part; the window lifting sheet metal part is placed in the shaping cavity, and part of the riveting screws enter the riveting grooves. The window lifting sheet metal part is tightly pressed in the shaping cavity through the multiple pre-pressing assemblies of the upper die, the hole wall of the mounting hole is stretched to form a stretching part, and the two riveting blocks gradually slide to be closed and laterally extrude the stretching part to be tightly riveted to the riveting screws. And the upper die moves upwards, the riveting head is separated from the riveting screw, and the two riveting blocks are obliquely and slidably unfolded under the action of elastic force and jack up the automobile window lifting guide rail. And the riveting screw extrudes and stretches the wall body on the periphery of the mounting hole, and the two riveting blocks gradually slide to be closed and laterally extrude the stretching part to be riveted to the riveting screw, so that the riveting strength is further improved.

Description

Technical Field

[0001] The invention relates to the field of stamping technology, in particular to a method for processing a window roller guide rail for an automobile. Background Art

[0002] Automotive window rails require screws for fixing. These screws, as mounting structures for the wheel axles within the rails, must meet the rail's verticality and connection reliability requirements. In related art, screws and rails are connected using riveting, as exemplified by Chinese patent CN206215842U, which discloses a riveting tool for automotive window rails.

[0003] Existing riveting tooling for window-sprung rails uses a single screw for riveting, and the tooling is equipped with numerous sensors to detect riveting accuracy. This not only results in low production efficiency but also makes it difficult to match the morphological deviations of the window-sprung rails with the screw's riveting dimensions. The riveted dimensions of the screw and rail are limited solely by the thickness of the rail sheet, resulting in a small riveted bond area and a low strength riveted structure. This technical issue calls for improvement. Summary of the Invention

[0004] In order to overcome the problems existing in the related art, an embodiment of the present invention provides a processing method for a car window guide rail, which is used to solve the technical problems of the morphological deviation of the car window guide rail itself, the difficulty in matching and detecting the riveting size of the screws, and the low connection strength of the riveted structure.

[0005] According to a first aspect of an embodiment of the present invention, a method for processing an automotive window swing guide rail is provided, wherein the automotive window swing guide rail includes a window swing sheet metal component and at least one rivet screw, a stamping die includes an upper die and a lower die, the lower die includes a lower die core and at least one set of rivet components, the lower die core having a shaping cavity for accommodating the window swing sheet metal component, the rivet components including two rivet blocks that slide obliquely on the lower die core and an elastic member, the rivet blocks having rivet grooves, wherein the two rivet blocks, under the push of the elastic member, extend beyond the bottom surface of the shaping cavity and are relatively spread out; The processing methods of automobile window guide rails include: Insert the rivet screw partially through the mounting hole of the window shaker sheet metal; The window-sliding sheet metal part is placed in the shaping cavity, and some of the riveting screws enter the riveting grooves; The upper die is controlled to move downward and close the die with the lower die. The windshield sheet metal is pressed against the shaping cavity by the multiple pre-pressing components of the upper die. The wall of the mounting hole is stretched to form a stretched portion when the riveting head of the upper die pushes the riveting screw. The two riveting blocks gradually slide together and laterally squeeze the stretched portion to rivet it to the riveting screw. The upper die is controlled to move upward, the riveting head is separated from the riveting screw, and the two riveting blocks are tilted, slid and unfolded under the action of elastic force and lift up the window guide rail of the car.

[0006] In one embodiment, the rivet groove includes a concave screw area and a rivet area, and the depth of the rivet area is greater than the depth of the screw area.

[0007] In one embodiment, the automobile window-lift guide rail is provided with two sets of riveting screws, and the lower die is symmetrically provided with riveting assemblies at both ends of the shaping cavity.

[0008] In one embodiment, the lower die is provided with at least one punching seat, and the upper die is provided with a punching head corresponding to the punching seat, and the punching head punches out a punching notch at the edge of the window swing sheet metal component.

[0009] In one embodiment, the punching head includes a flat punching portion and guide portions protruding from both sides of the punching portion, and the thickness of the guide portions is greater than or equal to the width of the punching portion.

[0010] In one embodiment, the lower die is provided with at least one flanging groove, the upper die is provided with a flanging punch corresponding to the flanging groove, there is a flanging space between the flanging groove and the flanging punch, and the concave direction of the flanging space is the same as the protruding direction of the stretching portion.

[0011] In one embodiment, two symmetrical shaping cavities are provided.

[0012] In one embodiment, the processing method further comprises: The burr edge of the window shaker sheet metal is protruded out of the shaping cavity; The edge of the window-swing sheet metal component is punched, wherein the portion of the passivation punch corresponding to the pressing of the edge of the window-swing sheet metal component is set as a concave passivation curved surface.

[0013] In one embodiment, the edge of the window roll sheet metal component is a smooth curved surface or a flat surface.

[0014] In one embodiment, one of the blunt punches is used to simultaneously punch the edges of the window shutter sheet metal parts in the two shaping cavities.

[0015] The technical solution provided by the embodiments of the present invention can achieve the following beneficial effects: the upper and lower dies close together to press the window swing sheet metal component, providing support and restraint for the component, thereby maintaining its stable shape. The rivet screws, through the cooperation of the rivet assembly and the rivet head, are pressed into the window swing sheet metal component at a specified angle, achieving high crimping angle consistency and ensuring that the rivet screws meet the press-fitting standards for the window swing sheet metal component.

[0016] The rivet screw squeezes and stretches the wall around the mounting hole, expanding the bonding area between the rivet screw and the window swing sheet metal, significantly increasing the rivet contact area and enhancing the rivet strength. The two rivet blocks gradually slide together and laterally squeeze and rivet the stretched portion to the rivet screw, further increasing the rivet strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0018] Figure 1 is a schematic diagram showing a stamping die in a mold closing state according to an embodiment.

[0019] Figure 2 FIG1 is an exploded schematic diagram showing a stamping die according to an embodiment.

[0020] Figure 3 FIG. 1 is a schematic cross-sectional view of an upper mold according to an embodiment.

[0021] Figure 4 1 is a schematic structural diagram of a lower mold according to an embodiment.

[0022] Figure 5 FIG1 is a schematic structural diagram showing a riveting assembly according to an embodiment.

[0023] Figure 6 The diagram is a partially enlarged schematic diagram showing a riveting assembly riveting a riveting screw according to an embodiment.

[0024] Figure 7 The figure is a partially enlarged schematic diagram showing the riveting of a riveting screw and a tensile part according to one embodiment.

[0025] Figure 8 1 is a schematic structural diagram of an upper mold according to an embodiment.

[0026] Figure 9 FIG1 is a partially enlarged schematic diagram showing a blunt punch punching two first sides according to an embodiment.

[0027] In the figure, the lower mold 10; the lower mold core 11; the shaping cavity 12; the positioning groove 121; the flanging groove 122; the riveting assembly 13; the riveting block 131; the riveting groove 132; the screw area 1321; the riveting area 1322; the punching seat 14; the upper mold 20; the riveting head 21; the pre-pressing assembly 22; the pre-pressing block 221; the spring member 222; the flanging punch 23; the passivation punch 24; the passivation curved surface 241; the punching head 25; the punch head 251; the guide part 252; the automobile window winder guide rail 30; the window winder sheet metal part 31; the flanging structure 311; the punching notch 312; the first side 313; the stretching part 314; the mounting hole 315; and the riveting screw 32. DETAILED DESCRIPTION

[0028] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inside", "outside" and the like indicate directions or positional relationships, they are based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] like Figures 1 to 4 As shown, the present invention provides a method for processing a window guide rail for an automobile. The window guide rail 30 includes a window sheet metal part 31 and at least one riveting screw 32. The window sheet metal part 31 is a stamped part. A mounting hole 315 is provided on the window sheet metal part 31. The riveting screw 32 needs to be riveted into the mounting hole 315.

[0030] In this embodiment, the automobile window guide rail 30 is repaired and riveted using a stamping die. The riveting screws 32 can be riveted and fixed while shaping the shape of the window sheet metal 31, thereby improving the overall shape accuracy and dimensional accuracy of the automobile window guide rail 30. In addition, one mold realizes the overall riveting assembly and shaping processing, greatly improving the production efficiency of the automobile window guide rail 30.

[0031] The stamping die includes an upper die 20 and a lower die 10. The lower die 10 includes a lower die core 11 and at least one set of riveting components 13. The upper die 20 is provided with an upper die core and a riveting head 21, which are arranged opposite to the riveting components 13. The lower die core 11 is provided with a shaping cavity 12 for accommodating a window swing sheet metal component 31. The shaping cavity 12 is a concave structure that can adapt to the shape of the window swing sheet metal component 31.

[0032] The riveting assembly 13 includes two riveting blocks 131 that slide obliquely on the lower mold core 11 and an elastic member. The elastic member is located at the bottom of the riveting blocks 131. The two riveting blocks 131 slide obliquely along the slide under the elastic force of the elastic member. When the stamping die is in the open mold state, the top ends of the two riveting blocks 131 extend out of the shaping cavity 12 and expand to form an opening structure for receiving the riveting screw 32. When the upper mold 20 and the lower mold 10 are closed, the two riveting blocks 131 are closed. The riveting blocks 131 are provided with riveting grooves 132 that can accommodate and clamp the positioning riveting screw 32. Furthermore, the riveting grooves 132 can also clamp the metal surrounding the riveting screw 32 in the window swing sheet metal 31 to improve the riveting strength.

[0033] The processing method of the automobile window guide rail 30 includes: S101: partially pass the rivet screw 32 through the mounting hole 315 of the window swing sheet metal 31. The window swing sheet metal 31 is provided with a through mounting hole 315, and the rivet screw 32 passes through the mounting hole 315, and the two constitute a preliminary assembly positioning.

[0034] S102: Place the window swing sheet metal 31 in the shaping cavity 12, with a portion of the rivet screw 32 entering the rivet groove 132. The window swing sheet metal 31 and the shaping cavity 12 are aligned, with the rivet screw 32 extending from the window swing sheet metal 31 and entering the rivet groove 132 between the two rivet blocks 131, thus securing the assembly.

[0035] S103: The upper mold 20 is controlled to move downward and close with the lower mold 10. The window swing sheet metal part 31 is pressed tightly against the shaping cavity 12 by the multiple pre-pressing components 22 of the upper mold 20. The wall of the mounting hole 315 is stretched to form a stretched portion 314 when the rivet head 21 of the upper mold 20 pushes the rivet screw 32. The two rivet blocks 131 gradually slide together and laterally squeeze the stretched portion 314 to rivet the rivet screw 32. The pre-pressing components 22 can press the window swing sheet metal part 31 tightly against the shaping cavity 12, ensuring that the window swing sheet metal part 31 is accurately installed and the shaping quality is maintained high.

[0036] After the multiple pre-stressing components 22 complete the pre-stressing, the rivet head 21 pushes the window swing sheet metal 31, the rivet screw 32 and the two rivet blocks 131 to move accordingly, and when the mold is closed, the two rivet blocks 131 laterally extrude the tensile portion 314 and rivet it to the rivet screw 32 to improve the riveting strength. Among them, the tensile portion 314 is a tensile rib structure around the mounting hole 315, which greatly improves the riveting strength of the window swing sheet metal 31 and the rivet screw 32, and also improves the center line accuracy of the rivet screw 32. The rivet screw 32 squeezes and stretches the wall around the mounting hole 315, which can expand the bonding area between the rivet screw 32 and the window swing sheet metal 31, greatly increasing the riveting contact area and improving the riveting strength. The two rivet blocks 131 gradually slide together and laterally extrude the tensile portion 314 and rivet it to the rivet screw 32 to further improve the riveting strength.

[0037] At step S104, the upper die 20 is moved upward, the rivet head 21 disengages the rivet screw 32, and the two rivet blocks 131 tilt and slide under the action of elastic force to expand and lift the window guide rail 30. The two rivet blocks 131 tilt and expand, allowing the rivet screw 32 to be ejected from the lower die 10, thereby achieving automatic material removal and reducing the risk of the window guide rail 30 becoming stuck.

[0038] like Figures 4 to 7As shown, the upper mold 20 and the lower mold 10 are combined to press the window swing sheet metal 31, providing support and restraint for the window swing sheet metal 31, maintaining the shape of the window swing sheet metal 31. The rivet screw 32 is pressed into the window swing sheet metal 31 at a specified angle through the rivet assembly 13 and the rivet head 21. The crimping angle is highly consistent, ensuring that the press-fit angle of the rivet screw 32 meets the press-fit standard of the window swing sheet metal 31.

[0039] The two rivet blocks 131 are closed to form a rivet structure, and the rivet groove 132 rivets the rivet screw 32 in sections. The rivet groove 132 includes a concave screw area 1321 and a rivet area 1322. The depth of the rivet area 1322 is greater than the depth of the screw area 1321. The rivet area 1322 can accommodate the tensile portion 314 and can close and squeeze the tensile portion 314. The screw area 1321 can accommodate the portion of the rivet screw 32 not covered by the tensile portion 314, maintaining a controllable connection effect for the corresponding portion of the rivet screw 32.

[0040] Preferably, the shaping cavity 12 is provided with a concave positioning groove 121, the sidewall of which fits the frustum of the window roll sheet metal part 31. The riveting assembly 13 is located at the bottom of the positioning groove 121, which can position the window roll sheet metal part 31.

[0041] In a preferred embodiment, the window swing guide rail 30 is provided with two sets of rivet screws 32, and the lower die 10 is symmetrically provided with rivet assemblies 13 at both ends of the shaping cavity 12. The rivet screws 32 are distributed at both ends of the window swing sheet metal component 31. During the stamping and assembly process of the window swing guide rail 30, the symmetrical structure enables the two sets of rivet screws 32 to form a reference point positioning structure for the shaping area of ​​the window swing sheet metal component 31, thereby improving the shaping position accuracy of the window swing sheet metal component 31.

[0042] The two groups of riveting screws 32 extend beyond the window swing sheet metal 31 , and the center distance between the two groups of riveting screws 32 is a fixed value. The riveting screws 32 are inserted into the riveting assembly 13 , which can perform regional positioning of the window swing sheet metal 31 and improve resistance to bending, torsion and deviation.

[0043] The pre-stressing assembly 22 pre-stresses the window swing sheet metal component 31 to position and tighten it before the rivet pressing assembly 13 and other functional mechanisms are activated, thereby preventing the window swing sheet metal component 31 from shifting. The pre-stressing assembly 22 includes a pre-stressing block 221 and a spring member 222. The spring member 222 is mounted on the upper mold 20. The pre-stressing block 221 slides within the upper mold 20. The protrusion height of the pre-stressing block 221 is greater than the protrusion height of the rivet pressing head 21. Two sets of pre-stressing assemblies 22 are provided, and the two sets of pre-stressing assemblies 22 are spaced apart and pressed together in the central area of ​​the window swing sheet metal component 31.

[0044] like Figure 2 、 Figure 3 and Figure 8As shown, in one embodiment, the lower die 10 is provided with at least one punching seat 14, which is provided with a through-hole. The upper die 20 is provided with a punching head 25 corresponding to the punching seat 14. The punching head 25 matches the hole. When the die is closed, the punching head 25 punches a notch 312 on the edge of the window swing sheet metal component 31. The notch 312 can be punched simultaneously with the shaping process, reducing the subsequent notch punching process and shortening the entire processing cycle.

[0045] In a preferred embodiment, the punch head 25 includes a flat punch portion 251 and guide portions 252 protruding from both sides of the punch portion 251. The thickness of the guide portions 252 is greater than or equal to the width of the punch portion 251. The punch portion 251 and the guide portions 252 form a substantially T-shaped structure. The guide portions 252 are distributed on both sides of the punch portion 251 to balance the impact force of the punch portion 251 and improve the impact stability of the punch portion 251.

[0046] The punch portion 251 is a flat structure, which reduces the impact force required to punch the notch 312 in the window swing sheet metal 31, thereby reducing the deformation force caused by the impact pressure on the window swing sheet metal 31. Furthermore, the notch 312 is located outside the window swing sheet metal 31 where the rivet screw 32 is located. The rivet screw 32 further enhances the impact deformation resistance of the window swing sheet metal 31.

[0047] In one embodiment, the lower die 10 is provided with at least one flanging groove 122, and the upper die 20 is provided with a flanging punch 23 corresponding to the flanging groove 122. A flanging space is defined between the flanging groove 122 and the flanging punch 23, and the concave direction of the flanging space is the same as the convex direction of the stretching portion 314. The flanging punch 23 and the flanging groove 122 cooperate to form a locally protruding flanging structure 311 in the corresponding hole area of ​​the window swing sheet metal component 31, thereby enhancing the structural strength of the window swing sheet metal component 31. Preferably, the flanging space is located in the middle area of ​​the window swing sheet metal component 31. The flanging punch 23 and the flanging groove 122 can enhance the deformation resistance of the middle area of ​​the window swing sheet metal component 31 during stamping, thereby improving the positioning accuracy of the middle area.

[0048] like Figure 2 、 Figures 8 and 9 As shown, in one embodiment, two symmetrical shaping cavities 12 are provided. The shaping cavity 12 of the stamping die can accommodate two window adjustment sheet metal parts 31, enabling simultaneous processing of the two window adjustment sheet metal parts 31, thereby improving production efficiency and balancing the overall force and impact of the entire stamping die, thereby improving molding quality.

[0049] In the above embodiment, the processing method of the automobile window guide rail 30 further includes: The burr edge of the window-rolling sheet metal part 31 is protruded out of the shaping cavity 12; The edge of the windshield sheet metal part 31 is punched, wherein the portion of the blunt punch 24 corresponding to the edge of the windshield sheet metal part 31 pressed together is configured as a concave blunt curved surface 241 .

[0050] The window swing sheet metal part 31 is a stamped part produced using a different stamping die. Consequently, it may have burrs and sharp edges. These burrs and sharp edges require multiple grinding cycles to meet product requirements. For ease of description, the sharp edges to be removed are defined as first edge 313.

[0051] In the present application, a blunting punch 24 is provided on the upper die 20 to press-blunt the first edge 313 during the die closing process to eliminate sharp edges. Preferably, the depth of the shaping cavity 12 corresponding to the first edge 313 is less than the thickness of the window swing sheet metal 31, so that the edge of the window swing sheet metal 31 extends beyond the shaping cavity 12. During the stamping process, the blunting punch 24 can blunt the edge of the first edge 313 of the sheet metal, forming a circular chamfer at the first edge 313, which can both locally enhance the local strength of the first edge 313 and improve the edge smoothness of the first edge 313.

[0052] It is worth mentioning that the stamping die in this application integrates the riveting reinforcement of the riveting screws 32, the punching processing of the punching notch 312, the flanging reinforcement of the middle part of the window adjustment sheet metal 31, and the passivation processing of the first edge 313, which realizes multi-process optimization on the basis of shaping the window adjustment sheet metal 31, greatly improves the product qualification rate and processing efficiency, and shortens the production cycle.

[0053] In one embodiment, the edge of the window roll-down sheet metal component 31 is a smooth curved surface or a flat surface, and the first side 313 of the window roll-down sheet metal component 31 is a curved surface or a flat surface. Accordingly, the projection of the first side 313 on the plane is a straight line. The blunt punch 24 strikes the first side 313 to form an arc-shaped fillet.

[0054] Furthermore, a passivation punch 24 is simultaneously punched on the edges of the two window-sliding sheet metal parts 31 in the two shaping cavities 12. A passivation punch 24 moves in the center and can simultaneously passivate the first edges 313 of the two window-sliding sheet metal parts 31, which can simplify the die punch and improve space utilization.

[0055] The other template structures of the stamping die are similar to those of the existing stamping die, which can be understood by reference and will not be described here in detail.

[0056] It should be understood that the present invention is not limited to the exact construction described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A method for processing a window guide rail for an automobile, wherein the window guide rail comprises a window sheet metal part and at least one riveting screw, wherein: The stamping die includes an upper die and a lower die, the lower die includes a lower die core and at least one set of riveting components, the lower die core is provided with a shaping cavity for accommodating the window swing sheet metal component, the riveting components include two riveting blocks and an elastic member that slide obliquely on the lower die core, the riveting blocks are provided with riveting grooves, wherein the two riveting blocks exceed the bottom surface of the shaping cavity and are relatively spread out under the push of the elastic member; The processing methods of automobile window guide rails include: Insert the rivet screw partially through the mounting hole of the window shaker sheet metal; The window-sliding sheet metal part is placed in the shaping cavity, and some of the riveting screws enter the riveting grooves; The upper die is controlled to move downward and close the die with the lower die. The windshield sheet metal is pressed against the shaping cavity by the multiple pre-pressing components of the upper die. The wall of the mounting hole is stretched to form a stretched portion when the riveting head of the upper die pushes the riveting screw. The two riveting blocks gradually slide together and laterally squeeze the stretched portion to rivet it to the riveting screw. The upper die is controlled to move upward, the riveting head is separated from the riveting screw, and the two riveting blocks are tilted, slid and unfolded under the action of elastic force and lift up the window guide rail of the car.

2. The processing method according to claim 1, characterized in that: The rivet groove includes a concave screw area and a rivet area, and the depth of the rivet area is greater than the depth of the screw area.

3. The processing method according to claim 1, characterized in that: The automobile window-lifting guide rail is provided with two groups of riveting screws, and the lower die is symmetrically provided with riveting assemblies at both ends of the shaping cavity.

4. The processing method according to claim 1, characterized in that: The lower die is provided with at least one punching seat, and the upper die is provided with a punching head corresponding to the punching seat, and the punching head punches the edge of the window swing sheet metal part to form a punching notch.

5. The processing method according to claim 4, characterized in that: The punching head includes a flat punching portion and guide portions protruding from both sides of the punching portion, and the thickness of the guide portions is greater than or equal to the width of the punching portion.

6. The processing method according to claim 1, characterized in that: The lower die is provided with at least one flanging groove, and the upper die is provided with a flanging punch corresponding to the flanging groove. There is a flanging space between the flanging groove and the flanging punch, and the concave direction of the flanging space is the same as the convex direction of the stretching portion.

7. The processing method according to any one of claims 1 to 6, characterized in that: The shaping cavities are symmetrically provided with two.

8. The processing method according to claim 7, characterized in that: The processing method also includes: The burr edge of the window shaker sheet metal is protruded out of the shaping cavity; The edge of the window-swing sheet metal component is punched, wherein the portion of the passivation punch corresponding to the pressing of the edge of the window-swing sheet metal component is set as a concave passivation curved surface.

9. The processing method according to claim 8, characterized in that: The edge of the window-rolling sheet metal part is a smooth curved surface or a flat surface.

10. The processing method according to claim 8, characterized in that: One of the blunt punches is synchronously punched on the edges of the window-rolling sheet metal parts in the two shaping cavities.

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