Laminating and edge covering device for interior trim part in middle of B column of automobile

Abstract

The invention provides an automobile B column middle interior trim part covering and edge covering device which comprises an upper die part and a lower die part, the lower die part is provided with a lower die, a plurality of positioning needle mechanisms arranged on the periphery of the lower die and a plurality of edge covering mechanisms, and the multiple positioning needle mechanisms can be used for pre-positioning a skin with holes formed in the edge firstly; the upper die and the lower die are matched for covering the skin, and the multiple edge covering mechanisms are used for edge covering, so that skin pre-positioning, covering and edge covering can be realized through single integrated equipment, and the production efficiency is improved. And the lower die part is further provided with a lower die overturning mechanism, the lower die, the positioning pin mechanism and the like can be integrally overturned to a specific angle, and the operation of placing the skin by a worker is more convenient and time-saving. The edge covering mechanism comprises a middle edge covering mechanism designed for the PUR fabric, the middle edge covering mechanism is provided with a clamping assembly, a lifting assembly, a translation assembly and an inclined withdrawing guide part, the clamping assembly can withdraw backwards in the inclined downward direction relative to the lower die, and therefore edge covering is achieved under the condition that the stretching amount is small.

Description

Technical Field

[0001] The present invention belongs to the technical field of automobile component processing devices, and in particular relates to a device for laminating and edging an interior trim component in the middle of an automobile B-pillar. Background Art

[0002] Automotive interiors typically consist of a frame covered with a corresponding surface. There are numerous types of automotive interiors, and the shapes, colors, and materials of these components vary between car models. Interior panels used for the A-, B-, and C-pillars typically have curled edges. During the production of these panels, the glue-coated surface is applied to one surface of the frame, with the edge of the surface wrapping around the edge of the frame. To create a premium, aesthetically pleasing workshop space, the surface must be well adhered to the frame and well wrapped around the edges.

[0003] Traditionally, surfaces are typically made of fabric or leather. Compared to these traditional fabrics, the use of new PUR (polyurethane) fabrics for automotive interior surfaces offers several advantages. Firstly, this fabric is environmentally friendly, reducing odor in the vehicle and creating a more environmentally friendly factory process. Secondly, this fabric offers a visually appealing aesthetic, enhancing the interior's visual appeal. It also exhibits excellent aging resistance, resisting degradation from prolonged use or exposure to sunlight, resulting in a long service life and greater user convenience. Furthermore, this fabric is relatively lightweight, contributing to vehicle lightweighting.

[0004] However, PUR fabric is relatively rigid and not suitable for large stretching. In order to allow the surface to be better wrapped around the edge of the skeleton, traditional automatic hemming equipment needs to stretch the edge of the surface covered on the skeleton in both directions in a large amount, so that the edge of the surface can be rolled up and attached to the other side of the skeleton, thereby achieving hemming. If traditional hemming equipment is used to hem the surface of the PUR fabric, due to the large amount of stretching, the surface of the PUR fabric will have a messy texture after being wrapped on the skeleton, resulting in poor appearance of the produced interior parts and even causing the surface to be stretched. If the surface of the PUR fabric is hemmed manually, it will lead to low production efficiency and insufficient consistency of the produced interior parts.

[0005] In addition, in traditional automatic hemming equipment, manually placing the skin on the lower mold is still time-consuming and inconvenient. Depending on the size of the frame, the skin will need to be laid deeper into the equipment. Workers need to bend over and stretch their arms to operate, and they also have to take into account the flatness of the skin, which makes the operation more inconvenient.

[0006] In addition, traditional automatic hemming equipment can often only perform the hemming process. The previous processes such as skin positioning and skin-to-skeleton overlapping still require manual operation, or are operated by other equipment and then manually transferred. The operation is still relatively inconvenient, and production efficiency is therefore affected to a considerable extent. Summary of the Invention

[0007] The present invention is made to solve the above problems, and its purpose is to provide a laminating and hemming device that is well applicable to the surface of new PUR fabrics and has a high degree of automation and high production efficiency. The present invention adopts the following technical solutions:

[0008] The present invention provides a device for laminating and edging the interior parts of the middle part of the B-pillar of an automobile, which is used to laminate the surface of a PUR fabric onto a frame and perform edging. The device has the following technical features: the device comprises: an upper mold part, which is used to carry the frame and drive the frame to rise and fall; and a lower mold part, which is located below the upper mold part and is used to place the surface, and cooperate with the upper mold part to perform lamination and edging, wherein the upper mold part has an upper mold that matches the frame, and the lower mold part comprises: a lower mold that matches the upper mold and is used to cooperate with the upper mold for lamination; a plurality of positioning pin mechanisms, which are arranged around the lower mold and are used to pre-position the surface before lamination; a plurality of edging mechanisms, which are provided It is arranged around the lower mold, used to wrap the edge of the skin onto the edge of the skeleton; and a lower mold flipping mechanism, used to flip the lower mold, the positioning needle mechanism and the edging mechanism as a whole, wherein the edging mechanism includes at least one middle edging mechanism, and the middle edging mechanism includes a clamping assembly for clamping the edge of the skin, a lifting assembly for driving the clamping assembly to rise and fall, a translation assembly for driving the clamping assembly to translate, and an oblique withdrawal guide component, the oblique withdrawal guide component is used to guide when the clamping assembly descends and retreats relative to the lower mold, so that the clamping assembly retreats in an oblique downward direction relative to the lower mold.

[0009] The device for laminating and edging the interior trim of the middle part of the automobile B-pillar provided by the present invention may also have such technical features, wherein the skeleton is in the shape of an elongated strip, the shape of the lower mold matches the skeleton, and the multiple positioning pin mechanisms are respectively arranged on both sides of the width direction of the lower mold, and the edging mechanism also includes: multiple corner edging mechanisms, respectively arranged at the corners of the lower mold, for edging the corners of the skeleton; and multiple edge edging mechanisms, respectively arranged on both sides of the width direction of the lower mold, for edging the two edges of the skeleton in the width direction.

[0010] The automobile B-pillar middle interior trim laminating and edging device provided by the present invention may also have such technical features, wherein, there are multiple middle edging mechanisms, which are respectively arranged on both sides of the width direction of the lower mold, and the multiple middle edging mechanisms on the same side are arranged in sequence, and the multiple side edging mechanisms are respectively arranged between two adjacent middle edging mechanisms. The side edging mechanism has an edge edging block that matches the edge of the skeleton, and the edge edging block is located below the clamping assembly.

[0011] The automotive B-pillar middle interior trim laminating and edging device provided by the present invention may also have such technical features, wherein the positioning pin mechanism includes a vertically upward positioning pin and a positioning pin cylinder for driving the positioning pin to rise and fall, the clamping assembly includes a base, an edging block fixed on the base, and a clamping block movably arranged on the base and located above the edging block, the edging block and the clamping block are used to cooperate with each other to clamp the edge of the epidermis, the edging block and the clamping block respectively have a clearance notch matching the positioning pin, and multiple positioning pin mechanisms are respectively arranged under part or all of the clamping assemblies, and the position of each positioning pin corresponds to the position of the clearance notch of the corresponding edging block and the clamping block.

[0012] The device for laminating and edging the middle part of the interior trim of the automobile B-pillar provided by the present invention may also have such technical features, that the device also includes a heating transplanting part, which includes a plurality of heating lamps for heating the skin and the skeleton, wherein the outer end of the edging block is Z-shaped and has a curved shape that matches the edge of the skeleton, the material of the edging block is brass, the outer end of the clamping block is L-shaped at an obtuse angle that matches the outer end of the edging block, the surface of the clamping block has a Teflon coating, and the outer end edge of the clamping block has a plurality of triangular teeth arranged in sequence, and the interior of the edging block and the lower mold are respectively formed with flow channels for circulating coolant.

[0013] The device for laminating and edging the middle part of the interior trim of the automobile B-pillar provided by the present invention may also have such technical features, wherein the clamping assembly also includes a clamping guide component and a clamping cylinder, the middle part of the base is wedge-shaped and has a mounting groove, the lower side has an extended support arm, and the upper side has an extended connecting plate, the edging block is fixed on the support arm, and the clamping block can be arranged above the edging block in an inclined and movable manner relative to the lower mold through the clamping guide component, and the clamping cylinder is arranged in the mounting groove, and its piston rod is inclined upward and is connected to the clamping block through a transmission component.

[0014] The device for laminating and hemming the middle part of the interior trim of the automobile B-pillar provided by the present invention may also have the following technical features, wherein the lifting assembly includes a lifting bracket, a first lifting cylinder and a second lifting cylinder, the first lifting cylinder and the second lifting cylinder are arranged in a stacked manner opposite to each other, and their piston rods face upward and downward respectively, the piston rod of the first lifting cylinder faces upward and is fixed to the connecting plate, and the piston rod of the second lifting cylinder faces downward and is fixed to the lifting bracket, the piston rod of the second lifting cylinder is longer than the piston rod of the first lifting cylinder, when the piston rod of the first lifting cylinder is extended and the piston rod of the second lifting cylinder is retracted, the height of the clamping assembly is a predetermined hemming height in place, when the piston rod of the first lifting cylinder is retracted and the piston rod of the second lifting cylinder is extended, the height of the clamping assembly is a predetermined height to be hemmed, when the piston rods of the first lifting cylinder and the second lifting cylinder are both extended, the height of the clamping assembly is a predetermined maximum stretching height, relative to the frame loaded on the lower die, the hemming height in place is lower than the edge of the frame, the height to be hemmed is flush with the edge of the frame, and the maximum stretching height is higher than the edge of the frame.

[0015] The automobile B-pillar middle interior trim covering and edging device provided by the present invention may also have such technical features, wherein the translation assembly includes a servo motor, a screw and a nut seat for driving the base to translate, and the nut seat is fixed to the bottom of the base, and the oblique withdrawal guide assembly includes a pair of oblique withdrawal guides and a pair of guide wheels. The oblique withdrawal guide has an elongated guide surface, which faces away from the lower mold, and the guide surface extends obliquely downward in the withdrawal direction. A pair of guide wheels are rotatably arranged below both sides of the base through corresponding brackets, and are used to roll along the guide surfaces on the corresponding sides when withdrawing, so that the clamping assembly withdraws in an oblique downward direction.

[0016] The device for laminating and edging the middle part of the automobile B-pillar provided by the present invention may also have such technical features, wherein the device is used to simultaneously produce two mirror-symmetrical middle part of the automobile B-pillar, the upper mold part includes an upper mold frame, an upper mold lifting mechanism for driving the upper mold frame to lift and lower, and two upper mold units arranged in the upper mold frame in a mirror-symmetrical manner, each of the upper mold units includes the upper mold, the lower mold part includes a lower mold frame correspondingly arranged below the upper mold frame, and two lower mold units arranged in the lower mold frame in a mirror-symmetrical manner, each of the lower mold units includes the lower mold, the positioning pin mechanism, the edging mechanism and the lower mold flipping mechanism.

[0017] The automobile B-pillar middle interior trim laminating and edging device provided by the present invention may also have such a technical feature, wherein the device also includes a heating and transferring part, wherein the heating and transferring part includes a translation mechanism arranged at the upper end of the lower mold frame, a transferring frame that can be translated on the lower mold frame through the translation mechanism, a transferring motor for driving the transferring frame to translate, and two heating units arranged in the transferring frame in a mirror-symmetrical manner, each of the heating units includes a plurality of brackets arranged in the transferring frame and a plurality of heating lamps arranged on the brackets, wherein the arrangement of the plurality of heating lamps in each heating unit matches the shape of the main covering surface of the skeleton.

[0018] Functions and effects of the invention

[0019] The device for laminating and hemming the center of an automotive B-pillar interior component provided by the present invention comprises an upper mold portion and a lower mold portion, wherein the lower mold portion comprises a lower mold, a plurality of positioning pin mechanisms disposed around the lower mold, and a plurality of hemming mechanisms. Thus, the plurality of positioning pin mechanisms are first used to pre-position the skin with an edge opening, and then the upper and lower molds cooperate to laminate the skin, and the plurality of hemming mechanisms disposed around the lower mold perform hemming at the edge. This allows the skin to be pre-positioned, laminated, and hemmed using a single, integrated device, reducing manual effort and improving the production efficiency of automotive B-pillar center interior components. Furthermore, the lower mold portion further comprises a lower mold flipping mechanism capable of flipping the lower mold, the positioning pin mechanisms, and the like as a whole, thereby enabling the flipping to an angle more convenient for manual placement of the skin, making the skin placement operation more convenient and time-saving for workers. In addition, since the edging mechanism includes a middle edging mechanism specially designed for PUR fabrics, which has a clamping assembly, a lifting assembly, a translation assembly and an oblique withdrawal guide component, the cooperation of these components can avoid excessive stretching of the skin in two directions. In particular, through the guiding effect of the oblique withdrawal guide component, the clamping assembly can be withdrawn in an oblique downward direction relative to the lower mold, so that the edge of the skin is smoothly attached to the inner side of the edge of the skeleton along the oblique line, thereby achieving edging with a small amount of stretching of the PUR fabric skin. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 3D diagram of a device for laminating and wrapping the inner lining of a middle B-pillar of an automobile according to an embodiment of the present invention;

[0021] Figure 2 2. This is a side view of a device for laminating and wrapping the inner trim of a middle portion of a B-pillar of an automobile according to an embodiment of the present invention;

[0022] Figure 3 3D diagram of the upper mold structure according to an embodiment of the present invention;

[0023] Figure 4This is a perspective view of a partial structure of a wrapping device for the middle portion of an interior trim part of a B-pillar of an automobile according to an embodiment of the present invention;

[0024] Figure 5 is a top view of the hemming mechanism in an embodiment of the present invention;

[0025] Figure 6 1 is a top view of the hemming mechanism and the positioning needle mechanism in an embodiment of the present invention;

[0026] Figure 7 This is a three-dimensional diagram of the middle hemming mechanism in use according to an embodiment of the present invention;

[0027] Figure 8 is a cross-sectional view of the middle hemming mechanism in use in an embodiment of the present invention;

[0028] Figure 9 is a perspective view of a clamping base according to an embodiment of the present invention;

[0029] Figure 10 is a three-dimensional diagram of an edge binding block and a clamping block in an embodiment of the present invention;

[0030] Figure 11 is a three-dimensional diagram of an edge-wrapping block according to an embodiment of the present invention;

[0031] Figure 12 yes Figure 4 An enlarged view of the portion within the middle frame A;

[0032] Figure 13 yes Figure 4 An enlarged view of the portion within the middle frame B;

[0033] Figure 14 is a schematic diagram of a predetermined position and a predetermined height in an embodiment of the present invention;

[0034] Figure 15 This is a schematic diagram of the hemming process in an embodiment of the present invention. Figure 1 ;

[0035] Figure 16 This is a schematic diagram of the hemming process in an embodiment of the present invention. Figure 2 ;

[0036] Figure 17 This is a schematic diagram of the hemming process in an embodiment of the present invention. Figure 3 ;

[0037] Figure 18 This is a schematic diagram of the hemming process in an embodiment of the present invention. Figure 4 ;

[0038] Figure 19 This is a schematic diagram of the hemming process in an embodiment of the present invention. Figure 5 ;

[0039] Figure 20 yes Figure 19 Enlarged view of the inner part of the middle frame C.

[0040] Reference numerals:

[0041] Device 100 for wrapping the middle interior trim of a B-pillar of an automobile; middle wrapping mechanism 10; mechanism bracket 11; clamping assembly 12; clamping base 121; support column 1211; mounting groove 1212; inclined surface 1213; connecting plate 1214; fixing plate portion 1215; fixing hole 1215a; wrapping block 122; fixing portion 1221; first extension portion 1222; recess 12221; second extension portion 1223; third extension portion 1224; clearance notch 1225; clearance groove 1226; wrapping inclined surface 1222a; wrapping bottom surface 1223a; clamping block 123; fixing portion 1231; clamping portion 1232; clearance notch 1233; triangular teeth 123 4; clamping transmission component 124; Y-type adapter 1241; T-type connector 1242; L-type connector 1243; clamping guide component 125; guide rail 1251; slider 1252; clamping cylinder 126; lifting assembly 13; lifting bracket 131; bottom plate 1311; vertical plate 1312; first lifting cylinder 132; second lifting cylinder 133; lifting guide component 134; guide rail 1341; slider 1342; translation assembly 14; translation guide component 141; guide rail 1411; slider 1412; screw rod 143; synchronous belt 144; synchronous pulley 145; servo motor 142; oblique withdrawal guide assembly 15; oblique push guide 151; guide Surface 1511a; guide wheel 152; guide wheel bracket 153; cooling assembly 16; corner hemming mechanism 20; front push cylinders 5-1, 5-2, 5-3, 5-4, 9-1, 9-2, 10-1; edge hemming mechanism 60; edge hemming block 61; front push cylinders 12-1, 12-2, 12-3, 12-4; upper mold section 30; upper mold unit 30A; upper mold frame 31; upper mold 32; pressing mechanism 33; upper mold lifting mechanism 34; upper mold bracket 35; front push cylinders 13-1 and 13-2, 14-1, 14-2, 14-3; lower mold section 40; lower mold unit 40A; lower mold frame 41; lower mold 42; lower mold flipping mechanism 43; positioning needle machine Structure 44; positioning needle 441; positioning needle cylinder 11-1, 11-2, 11-3, 11-4, 11-5, 11-6; forward pushing mechanism 45; heating transplanting part 50; heating unit 50A; transplanting frame 51; heating lamp 52; translation mechanism 53; transplanting motor 54; frame 70; epidermis 8; epidermis edge 81; skeleton 9; main covering surface 9a; secondary covering surface 9b; first edge portion 91; second edge portion 92; main board portion 93; hemming completion height H1; hemming height to be hemmed H2; maximum stretching height H3; backward limit position P1; hemming pressing position P2; origin position P3; hemming position to be hemmed P4; hemming position P5; pulling back position P6. DETAILED DESCRIPTION

[0042] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the following detailed description of the automotive B-pillar middle interior trim laminating and edging device of the present invention is given in conjunction with embodiments and drawings.

[0043] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] Figure 1 This is a three-dimensional diagram of the wrapping device for the interior trim of the middle part of the B-pillar of an automobile in this embodiment. Figure 2 It is a side view of the laminating and edging device for the interior trim part in the middle of the automobile B-pillar in this embodiment.

[0045] like Figure 1 and Figure 2 As shown, the laminating and edging device 100 for the middle B-pillar interior part of an automobile is an integrated device used to laminate a skin onto a corresponding interior part frame and to edge the frame, thereby forming a middle B-pillar interior part. The frame can be made of a skeleton material known in the art, such as a metal part or a hard plastic part. One side of the frame is the primary laminating surface, to which the skin will be laminated, and the other side is the secondary laminating surface. The edge of the skin will be rolled up and wrapped around the edge of the frame, and the edge of the skin will be attached and fixed to the edge of the secondary laminating surface. The skin is a PUR fabric (moisture-curing reactive polyurethane hot-melt adhesive fabric) with one side pre-coated with glue. The side of the skin coated with glue is the laminating surface, and the other side is the non-laminating surface.

[0046] The device 100 for laminating and hemming the middle part of the interior trim of the automobile B-pillar includes a frame 70 , an upper mold part 30 , a lower mold part 40 , and a heating and transferring part 50 .

[0047] The frame 70 is generally an open rectangular frame with multiple legs at the bottom. The upper mold 30 is mounted on the upper portion of the frame 70 and is vertically movable. The lower mold 40 is mounted on the lower portion of the frame 70. The heating and transfer unit 50 is mounted on the frame of the lower mold 40 and is horizontally movable.

[0048] Figure 3 This is a three-dimensional diagram of the upper mold part structure in this embodiment. Figure 3The upper die frame and the upper die lifting mechanism are not shown.

[0049] like Figures 1 to 3 As shown, the upper mold portion 30 includes an upper mold frame 31 , two upper mold units 30A, and an upper mold lifting mechanism 34 .

[0050] The upper mold frame 31 is a generally long rectangular box-shaped frame with an opening facing downward and is mounted on the frame 70 via an upper mold lifting mechanism 34. Two upper mold units 30A are respectively disposed in the upper mold frame 31 and are arranged in a mirror-symmetrical manner, respectively used to carry two mirror-symmetrical skeletons.

[0051] Each upper mold unit 30A includes an upper mold support 35 , an upper mold 32 , and a plurality of pressing mechanisms 33 .

[0052] The upper mold support 35 is in the shape of an elongated frame, one end of which is fixed on the upper mold frame 31 and the other end is fixed with the upper mold 32. The lower part of the upper mold 32 has a shape that matches one surface (non-cladding surface) of the skeleton and is used to place the skeleton.

[0053] A plurality of clamping mechanisms 33 are used to clamp the skeleton placed on the upper mold 32 in different directions, thereby grasping the skeleton and fixing it on the upper mold 32. Each clamping mechanism 33 includes a push block and a front push cylinder that drives the push block to move. In this embodiment, the upper mold mechanism 30 is provided with five clamping mechanisms 33, and correspondingly provided with front push cylinders 13-1 and 13-2, 14-1 to 14-3. Among them, the front push cylinder 14-3 is arranged on one side of the length direction of the upper mold 32, pushing the corresponding push block toward one side edge of the skeleton; the remaining front push cylinders are all arranged above the upper mold 32, and are respectively used to push the corresponding push blocks toward the two edges in the width direction of the upper mold 32.

[0054] The upper die lifting mechanism 34 is used to drive the upper die frame 31 and the two upper die units 30A to move upward or downward as a whole, so that they move closer to or away from the lower die below. The upper die lifting mechanism 34 can adopt a lifting structure in the prior art. In this embodiment, the upper die lifting mechanism 34 includes a lifting servo motor 341 for driving the lifting.

[0055] Figure 4 This is a three-dimensional diagram of the structure of the device for wrapping the inner trim of the middle part of the B-pillar of an automobile in this embodiment, in which the structure of the frame and the upper mold part are omitted.

[0056] like Figure 1 、 Figure 2 and Figure 4 As shown, the lower mold portion 40 includes a lower mold frame 41 and two lower mold units 40A (only one of the lower mold units is shown in the figure).

[0057] The lower mold frame 41 is a generally upwardly open square box-shaped frame, and its size and installation position correspond to those of the upper mold frame 35. The two lower mold units 40A are arranged in mirror symmetry in the lower mold frame 41 and correspond to the two upper mold units 30A.

[0058] Each lower mold unit 40A includes a lower mold 42, a lower mold turning mechanism 43, multiple positioning pin mechanisms 44, and multiple hemming mechanisms. The hemming mechanisms include multiple middle hemming mechanisms 10 for PUR fabrics, multiple corner hemming mechanisms 20, and multiple side hemming mechanisms 60.

[0059] The lower mold 42 is positioned at the bottom of the lower mold frame 41. The upper portion of the lower mold 42 has a shape that matches the main laminating surface of the frame and includes a contoured surface for cooperating with the upper mold 32 to laminate the frame to the skin. In this embodiment, the contoured surface of the lower mold 42 is generally concave, corresponding to the shape of the frame, and also has relatively smooth raised portions. The length and width of the lower mold 42 vary significantly, resulting in a generally long, rectangular shape.

[0060] The lower mold flipping mechanism 43 is used to drive the lower mold 42, the positioning needle mechanism 44 and all the edge wrapping mechanisms to flip, so that the lower mold 42, the positioning needle mechanism and the edge wrapping mechanism are tilted relative to the horizontal plane, which is more convenient for placing the skin. The lower mold flipping mechanism 43 mainly includes a loading plate, a rotating shaft and a flipping drive motor. The lower mold 42, the positioning needle mechanism 44 and the edge wrapping mechanism are all fixed on the same surface of the loading plate. The rotating shaft is set at one end of the loading plate in the length direction, which can drive the loading plate to flip. The flipping drive motor is used to drive the rotating shaft to rotate. Figure 1 and Figure 2 As shown, before starting the automatic hemming process, the lower mold flipping mechanism 43 tilts the lower mold 42 and its surrounding hemming mechanism, positioning needle mechanism, etc. as a whole, so as to facilitate workers to place the skin. Figure 4 As shown, after the skin is placed, the lower mold flipping mechanism 43 flips the lower mold 42 and its surrounding hemming mechanism, positioning pin mechanism, etc. to a horizontal position, and then the automatic hemming process begins. In this embodiment, the flip angle of the loading plate is 0° (i.e., the loading plate is horizontal) to 45°.

[0061] A plurality of positioning needle mechanisms 44 are distributed around the lower mold 42, and are used to pre-position the epidermis before lamination and to tension the surface to a certain extent. Each positioning needle mechanism 44 includes a bracket, a positioning needle, and a positioning needle cylinder (a positioning needle lifting and lowering drive cylinder). Among them, one end of the bracket is fixed to the loading plate, and the other end is used to install the positioning needle, so as to adjust the installation height of the positioning needle. The positioning needle is needle-shaped as a whole, vertically arranged with the needle tip facing upward. Its needle tip is spherical and the diameter at the needle tip is slightly larger than the diameter of the needle body connected to the needle tip, so that it can pass through the small hole pre-opened on the edge of the epidermis to position and tension the epidermis. The positioning needle cylinder is used to drive the positioning needle to rise and fall. In this embodiment, a total of six positioning needle mechanisms 44 are provided, and their positioning needle cylinders are respectively recorded as positioning needle cylinders 11-1 to 11-6.

[0062] Figure 5 1 is a top view of the hemming mechanism in this embodiment; Figure 6 : is a top view of the hemming mechanism and the positioning needle mechanism in this embodiment, Figure 6 The middle hemming mechanism of the upper layer is omitted.

[0063] like Figures 4 to 6 As shown, multiple hemming mechanisms are arranged around the lower mold 42. In this embodiment, three central hemming mechanisms 10 for PUR fabrics are located on either side of the lower mold 42 in the width direction. The three central hemming mechanisms 10 on each side are arranged closely and roughly in a straight line. Two conventional edge hemming mechanisms 60 are also located on either side of the lower mold 42 in the width direction. Each edge hemming mechanism 60 is located between two adjacent positioning pin mechanisms 44 and utilizes the space between two adjacent central hemming mechanisms 10, resulting in a lower installation height compared to the central hemming mechanisms 10. A conventional corner hemming mechanism 20 is located at each of the four corners of the lower mold 42. The two corner hemming mechanisms 20 on one side of the lower mold 42 in the length direction are also linked by a forward push mechanism, which can push the two corner hemming mechanisms 20 toward the lower mold 42 by a predetermined distance.

[0064] Among these hemming mechanisms, the corner hemming mechanism 20 and the side hemming mechanism 60 can adopt corresponding structures in the prior art. Therefore, the structure of the middle hemming mechanism 10 will be mainly described in detail below, and the structures of the other hemming mechanisms will only be briefly described.

[0065] Figure 7 This is a three-dimensional diagram of the middle hemming mechanism in use in this embodiment; Figure 8 This is a cross-sectional view of the middle hemming mechanism in use in this embodiment. Figure 7 and Figure 8 In addition to the middle edging mechanism, the lower mold, skin and skeleton are also shown (the skeleton is actually fixed on the upper mold).

[0066] like Figure 7and Figure 8 As shown, the frame 9 of this embodiment is the frame of the interior trim in the middle of the B-pillar. It is in the shape of a thin plate that is bent along the width direction. Its two side edges in the width direction are respectively a first edge portion 91 and a second edge portion 92 to be hemmed. The middle portion is the frame main plate portion 93. Bends are formed between the first edge portion 91, the second edge portion 92 and the main plate portion 93. The first edge portion 91 has a gradually changing height, with one end having a greater height. Due to the formation of a large recess on this side of the frame 9, the middle portion of the first edge portion 91 has a portion with a large height difference. The first edge portion 91 is generally bent toward the middle of the frame 9. That is, when the frame 9 is placed on the lower mold 42 as shown, the upper end of the first edge portion 91 is closer to the middle of the frame 9 than its lower end (where it connects to the main plate portion 93). When viewed from the side, the first edge portion 91 is slanted toward the middle of the frame 9. Similarly, the second edge portion 92 has a gradually varying width, with one end being of greater height. One end and the middle portion of the second edge portion 92 are rolled toward the middle of the frame 9 , while the other end is slightly rolled toward the outside.

[0067] One surface of the skeleton 9 is generally convex, which is the main laminating surface 9a, and the epidermis is mainly laminated on this surface; the other surface of the skeleton 9 is generally concave, which is the secondary laminating surface 9b, and the edge of the epidermis needs to be rolled over to the secondary laminating surface at the edge of the skeleton and laminated on the edge part of the secondary laminating surface.

[0068] When the skeleton 9 is placed on the lower mold 42 as shown in the figure, that is, the non-covered surface of the skeleton 9 is in contact with the lower mold 42, when the covered surface is facing upward, the upper edges of the first edge 91 and the second edge 92 are closer to the middle of the skeleton 9 relative to their lower sides (that is, the connection position with the main board part 93).

[0069] The central hemming mechanism 10 for PUR fabric is used to hem the surface of the PUR fabric overlaid on a frame, wrapping the edge of the surface to the middle of the frame edge. The central hemming mechanism 10 includes a mechanism bracket 11, a clamping assembly 12, a lifting assembly 13, a translation assembly 14, a diagonal guide assembly 15, and a cooling assembly.

[0070] The mechanism bracket 11 is a substantially square frame, fixed to the inner bottom surface of the lower mold frame 41 , and is used to support other components so that the clamping assembly 12 is placed at a predetermined height.

[0071] The clamping assembly 12 includes a clamping base 121 , an edge block 122 , a clamping block 123 , a clamping transmission member 124 , a clamping guide member 125 , and a clamping cylinder 126 .

[0072] Figure 9 It is a three-dimensional diagram of the clamping base in this embodiment.

[0073] like Figure 9As shown, the clamping base 121 is in the shape of a special-shaped block and can be formed by combining multiple components or forming a single piece. The middle portion of the clamping base 121 is similar to a wedge-shaped block, with the bottom dimension of the wedge-shaped block being larger than the top dimension. The bottom side has two parallel support columns 1211 extending from the bottom, and the top side has a connecting plate 1214 extending from the top. The support columns 1211 and the connecting plate 1214 extend in opposite directions.

[0074] Support column 1211 is arranged horizontally. A mounting groove 1212 is formed in the middle of clamping base 121 and between the two support columns 1211. The mounting groove 1212 includes a fixing plate 1215 that is approximately perpendicular to the extension direction of the mounting groove 1212. The fixing plate 1215 is provided with a circular through-hole 1215a. Two inclined surfaces 1213 are formed on either side of the mounting groove 1212 for installing guide rails to guide clamping. The inclined surfaces 1213 are inclined relative to the length of the support column 1211. The angle between the inclined surfaces 1213 and the inclined surfaces 1213 is related to the stretch of the skin and the size of the edge of the frame, and is approximately 60° to 80°. After assembly, support column 1211 is essentially horizontal, so the inclined surfaces 1213 are inclined at 60° to 80° relative to the horizontal direction.

[0075] The connecting plate 1214 is arranged horizontally and extends a long distance for connecting with the lifting assembly 13 .

[0076] Figure 10 is a three-dimensional diagram of the edging block and the clamping block in this embodiment; Figure 11 : is a three-dimensional diagram of the edging block in this embodiment, Figure 10 and Figure 11 The three-dimensional images of the edging block at different angles are shown respectively.

[0077] like Figure 10 and Figure 11 As shown, the edging block 122 is a special-shaped part, which includes an integrally formed fixed portion 1221, a first extension portion 1222, a second extension portion 1223, and a third extension portion 1224. The fixed portion 1221 is roughly rectangular with a notch on one side. Two mounting holes are provided on both sides for fixing the edging block 122 to the two support columns 1211 of the clamping base 121. After installation, the surface direction of the fixed portion 1221 is roughly horizontal. The first extension portion 1222 extends from an edge of the fixed portion 1221. One side of the first extension portion 1222 is roughly parallel to the fixed portion 1221, and the other side is slightly inclined downward relative to the fixed portion 1221. A long strip-shaped recess 12221 is formed on the other side. Depending on the shape of the corresponding edge portion of the skeleton, the edging block 122 can also have recesses of other shapes, or no recesses, or have other curved shapes.

[0078] Seen from the side, the outer end of the edging block 122 is roughly Z-shaped, and its outer end has a curved shape that matches the edge of the corresponding side of the frame.

[0079] In addition, if Figure 11 As shown, the second extension 1223 of the edging block 122 is in the shape of a long wedge. A raised portion protrudes away from the lower mold 42 at the connection point between the second extension 1223 and the third extension 1224, thereby forming an inclined edging slope 1223a on the back of the second extension 1223. The bottom surface of the third extension 1224 is a edging bottom surface 1224a connected to the edging slope 1223a. The shape and inclination angle of the edging slope 1223a match the edge portion of the secondary cladding surface 9b (concave surface) of the frame; the shape of the edging bottom surface 1224a matches the edge end face of the frame.

[0080] The clamping block 123 is also a special-shaped part, comprising a fixing portion 1231 and a chuck portion 1232. The fixing portion 1231 is in the shape of a rectangular plate and is provided with a plurality of mounting holes for securing the clamping block 123 to one end of the clamping transmission member 124. The chuck portion 1232 is in the shape of a plate, extending from one side of the fixing portion 1231. The angle between the chuck portion 1232 and the fixing portion 1231 is an obtuse angle that is closer to a right angle. The width of one side of the chuck portion 1232 is greater than that of the other side, i.e., it is roughly trapezoidal. The edge of the chuck portion 1232 has a curved shape that matches the edge of the edging block 122. The outer edge of the chuck portion 1232 has a plurality of triangular teeth 1234 arranged in sequence. Depending on the shape of the corresponding frame edge portion, the chuck portion 1232 of the clamping block 123 can also have other shapes, for example, the chuck portion 1232 can have a uniform width or other curved shapes.

[0081] Viewed from the side, clamping block 123 is generally L-shaped with an obtuse angle, with its outer end being straight and tilted outward. This outer end also has a curved shape that matches the edge of the corresponding side of the frame and matches the shape of the edging block 122 in the same mechanism. Clamping block 123 and edging block 122 cooperate to clamp the edge of the epidermis. When clamping, a triangular through-hole is formed between two adjacent triangular teeth 1234 of clamping block 123 and the upper surface of the epidermis, allowing light from the heating lamp to pass through and illuminate the clamped edge of the epidermis.

[0082] Figure 12 yes Figure 4 Enlarged view of the portion inside frame A.

[0083] like Figure 12As shown, the three hemming blocks 122 of the three PUR fabric middle hemming mechanisms 10 on the same side are closely arranged in sequence. The outer edges of the three hemming blocks 122 form a continuous arc shape that corresponds to the shape of the frame edge on the corresponding side. The same applies to the three clamping blocks 123. The width of the outer edges of the hemming blocks 122 and clamping blocks 123 is greater than the width of the other parts, so that their outer edges can be connected in sequence.

[0084] Figure 13 yes Figure 4 Enlarged view of the portion within frame B.

[0085] like Figure 13 As shown, the outer end of the edging block 122 has a clearance notch 1225 and a clearance groove 1226 connected to the notch. The clearance notch 1225 is formed on the third extension 1224 and is a generally horizontal rectangular notch. The clearance groove 1226 is formed on the second extension 1223 and is a groove with an arc-shaped bottom surface. The extension direction is the same as that of the second extension 1223, that is, generally vertical. The outer end of the clamping block 123 also has a clearance notch 1233 that matches the clearance notch on the edging block 122. The clearance notch 1233 is formed on the clamping head 1232 and is generally an inclined long strip. Its position and width correspond to the position and width of the clearance groove 1226, respectively, and its width is greater than the diameter of the positioning pin 441. These clearance notches and clearance grooves are used to make room for the positioning pins 441 , so that the skin edge positioned and tensioned by a plurality of positioning pins can be clamped without interfering with the positioning pins.

[0086] In addition, in this embodiment, the material of the edging block 122 is H62 brass. The surface of the clamping block 123 is plated with black Teflon material, which can prevent or reduce glue from adhering to the clamping block 123. The material is high temperature resistant and can maintain stable performance during heating.

[0087] The clamping transmission member 124 includes a Y-shaped adapter 1241, a rotating shaft, a T-shaped connector 1242 and an L-shaped connector 1243. One end of the Y-shaped adapter 1241 is fixed to the piston rod end of the clamping cylinder 126, and the other end has a pair of mounting holes for mounting the rotating shaft. One end (the lower end of the T) of the T-shaped connector 1242 is rotatably connected to the rotating shaft and is located between the pair of mounting holes of the Y-shaped connector 1241. The other end (the upper end of the T) of the T-shaped connector 1242 is fixed to the upper end of the L-shaped connector 1243. The L-shaped connector 1243 is L-shaped with an obtuse angle when viewed from the side, and the clamping block 123 is fixed to the lower surface of the other end of the L-shaped connector 1243.

[0088] The clamping guide assembly 125 is used to guide the movement of the clamping block 123 and includes two linear guide rails 1251 and two sliders 1252. The guide rails 1251 are fixed to the inclined surface 1213 and are arranged at the same angle as the inclined surface 1213. The sliders 1252 are slidably mounted on the guide rails 1251. The two sides of the L-shaped connector 1243 are fixed to the two sliders 1252, respectively, and the T-shaped connector 1242 is located between the two sliders 1252.

[0089] The clamping cylinder 126 (clamping drive cylinder) is installed in the mounting groove 1212 of the clamping base 121 and is inserted into the mounting hole of the horizontal plate-shaped portion. The piston rod of the cylinder faces upward and has the same inclination angle as the guide rail 1251. It is used to drive the clamping block 123 toward the hemming block 122 or in the opposite direction, thereby clamping or loosening the edge of the skin. For ease of description, the clamping cylinders of the three middle hemming mechanisms 10 on one side are respectively referred to as clamping cylinders 2-1 to 2-3, and the clamping cylinders of the three middle hemming mechanisms 10 on the other side are respectively referred to as clamping cylinders 6-1 to 6-3.

[0090] The lifting assembly 13 is used to drive the clamping assembly 12 to move up and down as a whole. The lifting assembly 13 includes a lifting bracket 131, a first lifting cylinder 132 (lifting drive cylinder), a second lifting cylinder 133, and a lifting guide component 134.

[0091] The lifting bracket 131 is roughly L-shaped and can be composed of a plurality of components or formed in one piece, including a bottom plate 1311 and a vertical plate 1312 .

[0092] The first lifting cylinder 132 and the second lifting cylinder 133 are arranged back to back, with their bottom surfaces fixed. The piston rods of the two are respectively vertically upward and downward, and are arranged roughly coaxially. Among them, the first lifting cylinder 132 is located at the top, with its piston rod facing upward and fixed to the connecting plate 1214. The second lifting cylinder 133 is located at the bottom, with its piston rod facing downward and fixed to the bottom plate 1311, and the piston rod of the second lifting cylinder 133 is longer than the piston rod of the first lifting cylinder 132. The two lifting cylinders are combined into a lifting drive component, which can provide four different lifting heights for the clamping assembly 12, and the heights are from low to high as follows: (1) the piston rods of both lifting cylinders are retracted; (2) the piston rod of the first lifting cylinder 132 is extended and the piston rod of the second lifting cylinder 133 is retracted; (3) the piston rod of the first lifting cylinder 132 is retracted and the piston rod of the second lifting cylinder 133 is extended; (4) the piston rods of both lifting cylinders are extended.

[0093] In this embodiment, in case (2), the height of the clamping assembly 12 is the height at which the hemming is completed. In case (3), the height of the clamping assembly 12 is the height to be hemmed, at which point the outer edge of the hemming block 122 is flush with the edge of the frame. In case (4), the clamping assembly 12 is at the maximum stretched height, at which point the outer edge of the hemming block 122 is above the edge of the frame, and the height difference between the two is less than or equal to 10 mm.

[0094] For the convenience of description, the first lifting cylinders of the three middle edging mechanisms 10 on one side are respectively recorded as first lifting cylinders 3-1 to 3-3, and the second lifting cylinders are respectively recorded as second lifting cylinders 4-1 to 4-3; the first lifting cylinders of the three middle edging mechanisms 10 on the other side are respectively recorded as first lifting cylinders 7-1 to 7-3, and the second lifting cylinders are respectively recorded as second lifting cylinders 8-1 to 8-3.

[0095] The lifting guide component 134 is used to guide the lifting of the clamping assembly 12. It includes multiple linear guide rails 1341 and multiple sliders 1342, two of which are provided in this embodiment. The two sliders 1342 are respectively fixed to the side of the vertical plate 1312. The grooves on the sliders 1342 extend in the vertical direction. The sliders 1342 and the two lifting cylinders are respectively located on either side of the vertical plate 1312. The two guide rails 1341 are respectively fixed to the side of the clamping base 121 and located below the connecting plate 1214. The guide rails 1341 and the sliders 1342 are slidably engaged to achieve lifting guidance.

[0096] The translation assembly 14 is used to drive the lifting assembly 13 and the clamping assembly 12 to translate as a whole. The translation assembly 14 includes a translation guide component 141, a translation servo motor 142, a screw 143, a synchronous belt (not shown), and a synchronous pulley 145.

[0097] Among them, the translation guide component 141 includes multiple linear guide rails 1411 and multiple sliders 1412. The multiple guide rails 1411 are fixed parallel to each other on the upper surface of the mechanism bracket 11. The sliders 1412 are slidably embedded in the guide rails 1411, and the sliders 1412 are fixed on the lower surface of the base plate 1311 of the lifting bracket 131.

[0098] Screw rod 143 is provided with a corresponding nut seat, which is also fixed to the lower surface of base plate 1311. A translation servo motor 142 is used to drive screw rod 143, thereby driving the overall movement of lifting assembly 13 and clamping assembly 12. In this embodiment, the screw rod lead is 5 mm. The motor reduction ratio of translation servo motor 142 is 1:1.

[0099] The synchronous belt and pulley 145 are used to transmit power between the translational servo electrode 142 and the screw 143, thereby miniaturizing the overall dimensions of the PUR fabric middle hemming mechanism 10. One synchronous pulley 145 is mounted on the output shaft of the servo motor 142, while the other is mounted on one end of the screw 143. Both pulleys 145 are positioned in a roughly aligned vertical direction. A synchronous belt is fitted over these pulleys 145, allowing the servo motor 142 to drive the screw 143 through the synchronous belt structure.

[0100] The oblique withdrawal guide assembly 15 is used to guide the movement of the clamping assembly 12 when it descends and withdraws (relative to the lower mold), so that the clamping assembly 12 can withdraw obliquely. The oblique withdrawal guide assembly 15 includes a pair of oblique withdrawal guide members 151, a pair of guide wheels 152 (rollers) and their guide wheel brackets 153.

[0101] Among them, the oblique withdrawal guide 151 is roughly an L-shaped component with an obtuse angle, which includes a first block part and a second block part, and a bending part is formed between the two blocks. The two blocks are roughly in the shape of long strips. One edge of the second block part is fixed on the upper surface of the mechanism bracket 11, and the first block part extends upwardly at an angle toward the lower mold 42. The first block part has an inclined long strip guide surface 1511a facing away from the lower mold 42.

[0102] The two guide wheel brackets 153 are respectively installed on the lower parts of the opposite sides of the clamping base 121 and extend to the bottom of the clamping base 121. The two guide wheels 152 are respectively rotatably installed on the lower ends of the two rolling brackets 153, and the positions of the two guide wheels 152 correspond to the two oblique push guides 151 respectively.

[0103] The cooling assembly includes a flow channel formed in the hemming block 122 and a pipeline connected to the flow channel. The flow channel and the pipeline are used to circulate a coolant, such as cooling water, to cool the skin. The water inlet and outlet of the flow channel on the hemming block 122 are located on its side. In addition, in this embodiment, a similar flow channel is also formed in the lower mold 42.

[0104] The corner hemming mechanism 20 can adopt the corresponding structure in the prior art. In this embodiment, it includes a corner hemming block and a forward push cylinder (forward push drive cylinder). The shape of the corner hemming block matches the shape of the frame corner. The forward push cylinders of the four corner hemming mechanisms 20 are respectively recorded as forward push cylinders 5-1 to 5-4. In addition, the two corner hemming mechanisms 20 on one side are linked by a forward push mechanism 45. The forward push mechanism 45 includes a connecting plate and forward push cylinders 10-1, 9-1, and 9-2. Among them, the forward push cylinder 10-1 is used to push the two corner hemming mechanisms 20 together toward the lower mold 42 for a distance, and the forward push cylinders 9-1 and 9-2 are respectively used to push the two corner hemming mechanisms 20 toward the lower mold 42 for a distance. The forward push distances of the two can be different. The forward push cylinders of the two corner hemming mechanisms 20 respectively push their corner hemming blocks obliquely toward the corners of the frame.

[0105] The edge hemming mechanism 60 can also adopt a corresponding structure in the prior art. In this embodiment, it includes an edge hemming block and a front push cylinder. The edge hemming block is long and narrow, and its shape matches the edge shape of the frame. The height of the edge hemming block is lower than that of the hemming block 122. The four front push cylinders of the edge hemming mechanism 60 are respectively denoted as front push cylinders 12-1 to 12-4.

[0106] The heating transplanting unit 50 includes a transplanting frame 51 , two heating units 50A, a translation mechanism 53 , and a transplanting motor 54 (translation drive motor).

[0107] The transplanting frame 51 is a square box-shaped frame opened upward, and is horizontally movably disposed on the upper end of the lower mold frame 41 via a translation mechanism 53 .

[0108] Each heating unit 50A includes multiple brackets and multiple heating lamps 52. The brackets are fixed to the bottom of the transplanting frame 51, and the heights of the brackets vary. The heating lamps 52 are fixed to the transplanting frame 51 by the brackets and are used to heat the frame and skin, activating the glue on the skin and allowing it to better fit onto the frame. In this embodiment, the multiple heating lamps 52 in each heating unit 50A are arranged roughly parallel to each other, corresponding to the shape of the frame surface, and arranged in a curved pattern corresponding to the shape of the frame surface.

[0109] The translation mechanism 53 includes guide rails, sliders, gears and racks, etc., which is a conventional translation mechanism structure, so it is not described in detail. The transplanting frame 51 is installed on the lower mold frame 41 through the translation mechanism 53, and can move horizontally relative to the lower mold frame 41, thereby driving multiple heating lamps 52 to move between the upper mold 32 and the lower mold 42 and to one side, no longer blocking the lower mold 42.

[0110] The transplanting drive motor 54 is used to drive the gears to rotate, thereby driving the transport frame 51 and the heating lamp 52 to translate as a whole through the meshing gear racks.

[0111] In other words, the apparatus of this embodiment includes two sets of mirror-symmetrical hemming devices, which can simultaneously process two mirror-symmetrical B-pillar middle interior parts. Since a car needs two mirror-symmetrical B-pillar middle interior parts, this arrangement is very advantageous.

[0112] In addition, multiple sensors are installed on the upper mold 32 and lower mold 42 to detect the status of the workpiece or mechanism. The automotive B-pillar center interior trim wrapping device 100 is equipped with a corresponding control device that can automatically control various mechanisms based on sensor signals. For example, it may include a workpiece sensor installed on the upper mold 32 to detect whether a frame is placed on the upper mold 32; a skin sensor installed on the lower mold 42 to detect whether a skin is present at a predetermined distance above the lower mold 42. Both the workpiece sensor and the skin sensor can be photoelectric sensors, etc. Cylinder position sensors can also be installed on each cylinder to detect whether the piston rod of each cylinder is retracted or extended. In addition, the control device includes a start button for the worker to initiate the automatic lamination and hemming process.

[0113] Figure 14 Schematic diagram of the predetermined position and predetermined height in this embodiment.

[0114] As mentioned above, multiple height adjustment controls are achieved by two lifting cylinders arranged in opposite directions, such as Figure 14 As shown, from low to high, the multiple predetermined heights include the edging height H1 (lower than the edge of the frame), the edging height H2 (roughly flush with the edge of the frame), and the maximum stretching height H3 (10 mm higher than the edge of the frame).

[0115] In addition, the control device pre-stores a plurality of predetermined horizontal positions and control parameters corresponding to each horizontal position, which are used to control the translation servo motor 142 to drive the clamping assembly 12 to move to the predetermined position. Figure 14 As shown, the horizontal distance at the edge of the skeleton is taken as the origin position P3 (0mm), and multiple predetermined positions include the backward limit position P1 (-15mm), the edge pressing position P2 (-5mm), the edge position P4 (15mm), the edge position P5 (75mm), and the pull-back position P6 (85mm).

[0116] The above parameters are only examples. In actual applications, they can be adjusted according to the specific performance parameters of the PUR fabric, the specific size and shape of the frame, etc.

[0117] Before processing begins, the lower mold 42, the positioning pin mechanism 43, and the hemming mechanism are all tilted. A worker places the skeleton onto the upper mold 31. Sensors on the upper mold 31 detect the skeleton, and the control device activates the multiple clamping mechanisms 33 on the upper mold 30 to secure the skeleton. The worker places the skin over the lower mold 42 and hooks the edges of the skin onto the positioning pins. Sensors on the lower mold 42 detect the skin. Then, the worker presses the start button, initiating the automatic hemming process.

[0118] After starting, the lower mold turning mechanism 43 turns the lower mold 42 and its surrounding positioning pin mechanism 44, hemming mechanism, etc. to a horizontal position, thus forming Figure 4 . Then, the transplanting motor 54 drives the transplanting frame 51 and the heating lamp 52 to move between the upper mold 32 and the lower mold 42, and the upper mold 32 drives the skeleton to press down slightly, and the heating lamp 52 heats the skeleton and the surface. After heating is completed, the upper mold 32 is reset, and the heating transplanting part 50 is reset. Then, after multiple PUR fabric middle hemming mechanisms 10 respectively clamp the edges of the surface, the upper mold 32 is pressed down toward the lower mold 42 to laminate the skeleton and the surface, and then multiple hemming mechanisms perform laminating and hemming. After laminating and hemming are completed, the device is reset and the processed B-pillar interior parts are output.

[0119] The following will describe in detail the process in which the middle hemming mechanism 10 wraps the skin edge to the middle of the frame edge during the above-mentioned hemming process. The hemming processes of other hemming mechanisms are basically the same as those in the prior art and will not be repeated here.

[0120] Figure 15 This is a schematic diagram of the edge middle hemming process in this embodiment. Figure 1 .

[0121] like Figure 15 As shown, before the upper mold 32 starts to press down or before it is pressed into place, the skin 8 is located between the upper mold 32 and the lower mold 42 and is tensioned by multiple positioning pins 441. The lifting assembly 13 places the clamping assembly 12 at the maximum stretching height H3 (about 10 mm). Then, the clamping cylinder 126 drives the clamping block 123 to press toward the edging block 122, so that the clamping assembly 12 clamps the skin edge 81. Then, the translation servo motor 142 drives the clamping assembly 12 to retreat (relative to the lower mold 42, the same below) to the retraction position P5, thereby tensioning the skin 8 through the multiple clamping assemblies 12 on both sides. At this time, the positioning pin cylinder can drive the positioning pin 441 to move downward, allowing the positioning pin 441 to detach from the skin.

[0122] Figure 16 This is a schematic diagram of the edge middle hemming process in this embodiment. Figure 2 .

[0123] like Figure 16As shown, during the downward pressing of the upper mold 32, the translation servo motor 142 drives the clamping assembly 12 to the predetermined hemming position P4, where the height difference between the skin edge and the frame edge remains approximately 10 mm. The forward cylinders of the corner hemming mechanism 20 and the edge hemming mechanism 60 then drive their respective corner hemming blocks and edge hemming blocks to press the skin against the edge of the frame corner (slightly below the edge).

[0124] Figure 17 This is a schematic diagram of the edge middle hemming process in this embodiment. Figure 3 .

[0125] like Figure 17 As shown, after the skin edge is placed in the above position, the clamping cylinder 126 drives the clamping block 123 to move in the opposite direction, so that the clamping assembly 12 releases the skin edge 81. At this time, the skin edge 81 is placed on the outer end of the hemming block 122 (the third extension 1224).

[0126] Figure 18 This is a schematic diagram of the edge middle hemming process in this embodiment. Figure 4 .

[0127] like Figure 18 As shown, after the clamping assembly 12 releases the skin edge, the lifting assembly 13 lowers the clamping assembly 12 to the hemming height H2. The servo motor 142 then drives the clamping assembly 12 forward to the predetermined hemming downward pressing position P2, causing the hemming block 122 to push the skin edge, rolling it to the other side of the frame edge (i.e., rolling it to the edge of the secondary laminating surface 9b of the frame 9). Furthermore, the hemming bottom surface 1224a of the hemming block 122 contacts the non-laminating surface of the skin 8, pressing the skin edge 81 against the upper end of the frame edge. At this point, the guide wheel 152 is roughly in contact with the upper end of the guide surface 1511a of the oblique guide 151.

[0128] Figure 19 This is a schematic diagram of the edge middle hemming process in this embodiment. Figure 5 , Figure 20 yes Figure 19 An enlarged view of the inner part of the middle frame C, Figure 20 The figure shows the shape of the skeleton edge and the skin edge after the hemming is completed.

[0129] like Figure 19 and Figure 20As shown, after the skin edge 81 is rolled over to the other side of the frame edge, the lifting assembly 13 drives the clamping assembly 12 down to the hemming height H1. During the descent, the guide wheel 152 rolls downward along the inclined guide surface 1511a, providing guidance. At the same time, the translation servo motor 142 follows, causing the clamping assembly 12 to retreat in an inclined backward direction. The hemming bevel 1223a of the hemming block 122 presses the skin edge 81 downward against the edge of the secondary laminating surface 9b of the frame 9, thereby completing the hemming operation with minimal stretching of the skin 8.

[0130] Functions and Effects of the Embodiments

[0131] The device for hemming the center B-pillar interior trim provided by this embodiment comprises an upper mold portion and a lower mold portion. The lower mold portion comprises a lower mold, multiple positioning pin mechanisms disposed around the lower mold, and multiple hemming mechanisms. Thus, the multiple positioning pin mechanisms are used to pre-position the skin with an edge opening. The upper and lower molds then cooperate to laminate the skin, and the multiple hemming mechanisms surrounding the lower mold hem the edges. This allows the pre-positioning, lamination, and hemming of the skin to be accomplished using a single, integrated device, reducing manual effort and improving the production efficiency of the center B-pillar interior trim. Furthermore, the lower mold portion comprises a lower mold flipping mechanism that flips the lower mold, the positioning pin mechanisms, and the like as a whole, thereby enabling the flipping to a more convenient angle for manual skin placement, making skin placement more convenient and time-saving for workers. In addition, since the edging mechanism includes a middle edging mechanism specially designed for PUR fabrics, which has a clamping component, a lifting component, a translation component and an oblique withdrawal guide component, the cooperation of these components can avoid excessive stretching of the skin in two directions. In particular, through the guiding effect of the oblique withdrawal guide component, the clamping component can be withdrawn in an oblique downward direction relative to the lower mold, so that the edge of the skin is smoothly attached to the inner side of the edge of the skeleton along the oblique line, thereby achieving edging with a small amount of stretching of the PUR fabric skin.

[0132] In the embodiment, the device also includes a heating transplanting part, which can not only heat the skin coated with glue and the main overlapping surface of the skeleton to make the skin adhere to the skeleton more effectively, but also can be translated to one side after the heating is completed without causing obstruction between the upper and lower molds. Therefore, it is easy to realize automatic heating and resetting after heating, and no manual heating is required through other tools.

[0133] In the embodiment, in the middle edging mechanism, the translation assembly is driven by a servo motor, and the oblique withdrawal guide assembly includes a pair of oblique withdrawal guides and a pair of guide wheels. The oblique withdrawal guide has an inclined surface inclined downward facing the lower mold, and the guide wheel can roll along the inclined surface. Therefore, when the lifting assembly drives the clamping assembly to descend, the guidance can be achieved by the rolling of the pair of guide wheels along the guide surface. At the same time, the servo motor can achieve follow-up, so that the clamping assembly can drive the clamped skin to retreat in an oblique downward direction, thereby achieving edging while reducing the stretching of the skin.

[0134] Furthermore, the clamping assembly includes an edging block and a clamping block, wherein the outer end portion of the edging block is Z-shaped, and the outer end portion of the clamping block is L-shaped at an obtuse angle that matches the outer end portion of the edging block, and the edges of both have a curved shape that matches the edge of the skeleton. The multiple edging blocks and clamping blocks on each side of the device are arranged closely in sequence, and their outer end edges are connected in sequence to form a curved shape that matches the edge of the skeleton. Therefore, it can not only clamp the skin well, making it less likely to slip during the edging process, but also better perform edging operations on skeletons with specific edge shapes, so that the appearance of the interior parts after edging is better.

[0135] Furthermore, the outer edge of the clamping block has a plurality of triangular teeth (inverted triangular teeth) arranged in sequence, so that after clamping the skin, a plurality of triangular through holes can be formed between two adjacent triangular teeth and the upper surface of the skin. These through holes can allow the light of the heating lamp to pass through and illuminate the edge of the clamped skin, thereby better activating the glue at the edge and making the overlapping and edging effect at the edge of the skin better.

[0136] Furthermore, the outer end of the edging block has a special shape, forming a connected edging bottom surface and edging inclined surface, which match the upper end surface of the frame and the inner side edge portion of the frame respectively. Therefore, the clamping assembly can not only be used to clamp the edge of the skin and stretch it above the edge of the frame, but also to achieve edging through these specially shaped edging blocks, and further push the skin to roll over to the other side of the frame edge. In this process, the skin is well fitted with the upper end surface of the frame through its edging bottom surface, and in the subsequent retreat process, the skin is well attached to the inner edge of the frame through its edging inclined surface, that is, the composite function is achieved through a streamlined structure, which is conducive to the miniaturization of the mechanism and device while meeting the functional requirements.

[0137] Furthermore, the edging block is made of brass and has a flow channel inside for circulating coolant. A similar flow channel is also provided in the lower mold. Therefore, the edging block will not be deformed or deteriorated when exposed to the heating lamp, and can stably clamp the surface. After the edging is completed, the internal flow channel can be used to cool the surface and the frame, thereby improving the production rhythm.

[0138] Furthermore, the surface of the clamping block is coated with Teflon material, which has excellent thermal stability and will not deform or deteriorate when exposed to a heating lamp. It can stably clamp the skin, and the material is not easy to adhere to glue. Combined with the design of the triangular teeth on the outer end of the clamping block, it can avoid sticking to and taking away the glue on the skin as much as possible, and it can also avoid having to carefully clean the glue on the clamping block after each use, making the use of the mechanism and device more convenient and production more efficient.

[0139] Furthermore, the lifting assembly includes two lifting cylinders stacked back to back, whose piston rods are respectively facing upward and downward and have different piston rod lengths (strokes). Therefore, four different heights can be provided through the action of these two lifting cylinders. In this embodiment, three of the heights are used as the hemming height, the height to be hemmed, and the maximum stretching height, respectively. This enables precise multi-height adjustment control to be achieved with a very simple and streamlined mechanical structure, and does not require complex software control.

[0140] Furthermore, the maximum stretching height is that the height difference between the edge of the skin and the uppermost end of the skeleton is less than or equal to 10 mm, thereby further preventing the skin from being excessively stretched.

[0141] Furthermore, in the translation assembly, a screw is positioned above the translation servo motor, and the two are connected by a synchronous belt structure, thereby reducing the footprint of the PUR fabric's central hemming mechanism. Because numerous hemming mechanisms are required around the lower mold, the available space for each is very limited. This design is highly advantageous, allowing for the placement of more hemming mechanisms within the limited space, thereby improving the precision of the hemming. Furthermore, the use of a translation servo motor not only ensures high translation accuracy but also enables follow-up after the brake is engaged, thereby cooperating with the diagonal withdrawal guide component to achieve diagonal retreat.

[0142] In the embodiment, the device has two sets of upper mold units, lower mold units and heating units that are mirror-symmetrical, so two mirror-symmetrical automobile B-pillar middle interior parts can be processed at the same time. Since two such interior parts are required to be mirror-symmetrical in a car, such a setting is very advantageous and can improve the production efficiency of automobile interior parts. It can also better ensure the consistency of a pair of automobile interior parts in a car, making the interior space of the car look better.

[0143] Furthermore, the two upper mold units share the upper mold frame and the upper mold lifting mechanism, and the two heating units share the transplanting frame, the translation mechanism and the transplanting motor, thereby relatively reducing the number of electronic control components and making automated control easier.

[0144] Furthermore, a workpiece sensor is provided on the upper die, and a skin sensor is provided on the lower die. These sensors can automatically detect whether a skeleton is placed on the upper die and whether a skin is placed at a predetermined distance above the lower die. This allows the skeleton to be automatically captured after placement, and the automatic lamination and hemming process to be initiated only after both the skeleton and skin are in place. This prevents damage to components or waste of raw materials caused by starting the process without a workpiece. Furthermore, sensors for cylinder position / reset can be provided on each cylinder, or on relatively important cylinders, to automatically detect whether key actions are executed at specific process times, ensuring the quality of the final product.

[0145] The above embodiments are merely illustrative of specific implementations of the present invention, and the present invention is not limited to the scope of the description of the above embodiments. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention as claimed. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for laminating and hemming the middle part of the B-pillar of an automobile, used for laminating the surface of a PUR fabric onto a frame and performing hemming, characterized in that: include: The upper mold part is used to carry the skeleton and drive the skeleton to rise and fall; as well as The lower mold part is located below the upper mold part and is used to place the skin and cooperate with the upper mold part to perform lamination and hemming. Wherein, the upper mold part has an upper mold matching the skeleton, The lower mold part comprises: A lower mold, matched with the upper mold, and used for cooperating with the upper mold for lamination; A plurality of positioning pin mechanisms are arranged around the lower mold and are used to pre-position the skin with corresponding holes on the edge before lamination; a plurality of edge wrapping mechanisms, arranged around the lower mold, for wrapping the edges of the skin onto the edges of the frame; and The lower mold flipping mechanism is used to flip the lower mold, the positioning needle mechanism and the hemming mechanism as a whole. Wherein, the edge binding mechanism includes at least one middle edge binding mechanism, The middle hemming mechanism includes a clamping assembly for clamping the edge of the skin, a lifting assembly for driving the clamping assembly to move up and down, a translation assembly for driving the clamping assembly to move horizontally, and an oblique guide component. The oblique withdrawal guide component is used to play a guiding role when the clamping assembly descends and withdraws relative to the lower mold, so that the clamping assembly withdraws in an oblique downward direction relative to the lower mold.

2. The automotive B-pillar middle interior trim wrapping device according to claim 1, Its characteristics are: in, The skeleton is in the shape of an elongated strip, and the shape of the lower mold matches the skeleton. The plurality of positioning pin mechanisms are respectively arranged on both sides of the width direction of the lower mold. The hemming mechanism further comprises: A plurality of corner hemming mechanisms are respectively provided at each corner of the lower mold and are used to hem the corners of the frame; as well as A plurality of edge wrapping mechanisms are respectively arranged on both sides of the lower mold in the width direction, and are used to wrap the two edges in the width direction of the frame.

3. The device for laminating and hemming the middle part of the interior trim of the automobile B-pillar according to claim 2, characterized in that: in, There are multiple middle edge wrapping mechanisms, which are respectively arranged on both sides of the width direction of the lower mold, and the multiple middle edge wrapping mechanisms on the same side are arranged in sequence. The plurality of edge binding mechanisms are respectively arranged between two adjacent middle binding mechanisms, and the edge binding mechanisms have edge binding blocks that match the edges of the frame, and the edge binding blocks are located below the clamping assembly.

4. The device for laminating and hemming the middle part of the interior trim of the automobile B-pillar according to claim 3, characterized in that: in, The positioning needle mechanism includes a positioning needle pointing vertically upward and a positioning needle cylinder for driving the positioning needle to move up and down. The clamping assembly includes a base, a edging block fixed on the base, and a clamping block movably arranged on the base and located above the edging block. The edging block and the clamping block are used to cooperate with each other to clamp the edge of the skin. The edging block and the clamping block respectively have a clearance notch matching the positioning pin. The plurality of positioning pin mechanisms are respectively arranged under part or all of the clamping assemblies, and the position of each positioning pin corresponds to the position of the corresponding edging block and the position of the clearance notch of the clamping block.

5. The device for laminating and wrapping the inner lining of the middle part of the B-pillar of an automobile according to claim 4, characterized in that: Also includes: A heating transplanting part, comprising a plurality of heating lamps, for heating the skin and the skeleton, The outer end of the edging block is Z-shaped and has a curved shape that matches the edge of the frame. The material of the edging block is brass. The outer end of the clamping block is in an obtuse L-shape that matches the outer end of the edging block. The surface of the clamping block has a Teflon coating, and the outer edge of the clamping block has a plurality of triangular teeth arranged in sequence. Flow channels for circulating cooling liquid are respectively formed inside the edge wrapping block and the lower mold.

6. The device for laminating and hemming the middle part of the interior trim of the automobile B-pillar according to claim 4, characterized in that: in, The clamping assembly further comprises a clamping guide component and a clamping cylinder. The middle part of the base is wedge-shaped and has a mounting groove, a support arm extending from one side of the lower part, and a connecting plate extending from one side of the upper part. The edging block is fixed on the support arm, The clamping block is arranged above the edge-wrapping block so as to be tiltably movable relative to the lower die through the clamping guide component. The clamping cylinder is arranged in the installation groove, and its piston rod is tilted upward and is connected to the clamping block through a transmission component.

7. The device for laminating and hemming the middle part of the interior trim of the automobile B-pillar according to claim 6, characterized in that: in, The lifting assembly includes a lifting bracket, a first lifting cylinder and a second lifting cylinder. The first lifting cylinder and the second lifting cylinder are stacked and arranged back to back, with their piston rods facing upward and downward respectively. The piston rod of the first lifting cylinder faces upward and is fixed to the connecting plate. The piston rod of the second lifting cylinder faces downward and is fixed to the lifting bracket. The piston rod of the second lifting cylinder is longer than the piston rod of the first lifting cylinder. When the piston rod of the first lifting cylinder is extended and the piston rod of the second lifting cylinder is retracted, the height of the clamping assembly is the predetermined hemming height. When the piston rod of the first lifting cylinder is retracted and the piston rod of the second lifting cylinder is extended, the height of the clamping assembly is the predetermined height to be hemmed. When the piston rods of the first lifting cylinder and the second lifting cylinder are both extended, the height of the clamping assembly is a predetermined maximum stretching height. Relative to the frame placed on the lower die, the hemming height is lower than the frame edge, the to-be-hemmed height is flush with the frame edge, and the maximum stretching height is higher than the frame edge.

8. The device for laminating and hemming the middle part of the interior trim of the automobile B-pillar according to claim 4, characterized in that: in, The translation assembly includes a servo motor, a screw rod and a nut seat for driving the base to translate, and the nut seat is fixed to the bottom of the base. The oblique withdrawal guide assembly includes a pair of oblique withdrawal guide members and a pair of guide wheels. The oblique withdrawal guide has a long strip guide surface facing away from the lower mold, and along the withdrawing direction, the guide surface extends obliquely downward. A pair of guide wheels are rotatably arranged below both sides of the base through corresponding brackets, and are used to roll along the guide surfaces on the corresponding sides when retreating, so that the clamping assembly retreats in an oblique downward direction.

9. The device for laminating and hemming the middle part of the interior trim of the automobile B-pillar according to claim 1, characterized in that: in, The device is used to simultaneously produce two mirror-symmetrical automobile B-pillar middle interior trim parts. The upper mold part includes an upper mold frame, an upper mold lifting mechanism for driving the upper mold frame to lift and lower, and two upper mold units arranged in a mirror-symmetrical manner in the upper mold frame, each of the upper mold units includes the upper mold, The lower mold part includes a lower mold frame correspondingly arranged below the upper mold frame, and two lower mold units mirror-symmetrically arranged in the lower mold frame. Each of the lower mold units includes the lower mold, the positioning pin mechanism, the edging mechanism and the lower mold flipping mechanism.

10. The device for laminating and wrapping the inner lining of the middle part of the automobile B-pillar according to claim 9, characterized in that: Also includes: Heating the transplanting part, The heating and transplanting part includes a translation mechanism provided at the upper end of the lower mold frame, a transplanting frame which is translationally provided on the lower mold frame by the translation mechanism, a transplanting motor for driving the transplanting frame to translate, and two heating units which are mirror-symmetrically provided in the transplanting frame. Each of the heating units comprises a plurality of brackets arranged in the transplanting frame and a plurality of heating lamps arranged on the brackets. Wherein, the arrangement of the plurality of heating lamps in each heating unit matches the shape of the main covering surface of the skeleton.

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