Covering and edge covering equipment and method for interior trim part on upper portion of automobile B column

Abstract

The invention provides an automobile B pillar upper portion interior trim part covering and edge covering device and method.The device comprises a covering and edge covering device and a control device, and the covering and edge covering device comprises an upper die, an upper die lifting mechanism, a lower die, a plurality of edge covering mechanisms and a heating transplanting part; the control device sequentially controls the heating transplanting part to heat, controls the upper die to press downwards to cover the skin and the framework, and controls the edge covering mechanisms to cover the edges, so that the multiple working procedures of heating, covering and edge covering can be automatically completed, and the production efficiency is high. The edge covering mechanism comprises the middle edge covering mechanism which is provided with the maintaining assembly, so that the position of the skin part covering the step part can be maintained when the edge covering mechanism covers the edge of the framework, and the skin part covering the step part can be prevented from being pulled and driven due to edge covering operation; therefore, the surface skin can be well covered at the edge with the step part, and the appearance quality of a finished product is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of automated processing equipment for automobile parts, and in particular relates to an equipment and method for laminating and hemming an upper interior trim part of an automobile B-pillar. Background Art

[0002] Automobiles feature a variety of interior components, typically formed by wrapping a corresponding surface over a frame. The interior components used for the A- and B-pillars are typically curved, plate-like structures. The B-pillar interior components can be further divided into three sections: upper, middle, and lower. The upper B-pillar interior component features a clearance hole in the middle for the seatbelt mounting structure, and one edge features multiple stepped sections (fasteners) for assembly, making automatic hemming difficult. Traditional hemming equipment typically uses hemming blocks to push the edge of the surface forward and then wrap it down, thus achieving hemming. However, when hemming these edges with stepped sections, the stepped sections are obstructed. Furthermore, when hemming other edge sections, the surface section at the edge with the stepped sections is pulled by the other sections, causing it to peel or shift from the frame. This results in an unsatisfactory appearance for the finished interior component, necessitating manual processing.

[0003] On the other hand, in recent years, some car models have begun using new PUR (polyurethane) fabrics as the surface of automotive interior parts. Compared with traditional surfaces (usually fabrics or leather), PUR fabrics offer many advantages, including environmental friendliness, reduced interior odor, and a more environmentally friendly factory processing environment. They also offer a more attractive appearance, enhancing the sense of luxury within the vehicle interior. They also have excellent aging resistance, are less susceptible to aging from long-term use or exposure to sunlight, have a long service life, and are easier to maintain. They are also relatively lightweight, contributing to vehicle lightweighting. However, the surface of this new fabric is relatively rigid, and traditional automatic hemming equipment requires a significant amount of stretching in both directions on the edge of the cover attached to the frame to allow the cover to be rolled over and attached to the other side of the frame. This significant stretching of the PUR fabric causes the PUR fabric to have a disordered texture after being wrapped around the frame, resulting in poor appearance and even damage to the cover. Summary of the Invention

[0004] The present invention is made to solve the above problems, and its purpose is to provide a laminating and hemming device suitable for PUR skin, capable of hemming a frame with a stepped portion on one edge, and with a high degree of automation. The present invention adopts the following technical solutions:

[0005] The present invention provides a laminating and edging device for the upper interior parts of automobile B-pillars, which is used to laminate the surface of PUR fabric onto a frame and perform edging. One side edge of the frame has multiple step portions extending toward the middle of the frame. It has the following technical characteristics: the device includes: a laminating and edging device for laminating the surface onto the frame; and a control device for controlling the laminating and edging device according to a predetermined process sequence, wherein the laminating and edging device includes: an upper mold for carrying the frame; an upper mold lifting mechanism for driving the upper mold to lift and lower; a lower mold for cooperating with the upper mold to laminate the surface and the frame; a heating transfer portion arranged above the lower mold for heating the frame and the surface; and multiple edging mechanisms arranged around the lower mold for edging the edge of the surface onto the edge of the frame. The upper mold includes at least one middle edging mechanism, which is arranged corresponding to the step portion, and includes a clamping component for clamping the middle part of the skin edge, a lifting component for driving the clamping component to rise and fall, a translation component for driving the clamping component to translate relative to the lower mold, and a holding component for keeping the skin part covered on the step portion during the edging process. The control performed by the control device at least includes: controlling the heating transplanting part to heat the skin and the skeleton, and resetting after the heating is completed; controlling the upper mold carrying the skeleton to press downward toward the lower mold with the skin arranged above, so as to overlap the skin and the skeleton; and controlling multiple edging mechanisms to wrap the skin edge onto the skeleton edge, wherein the middle edging mechanism is controlled to clamp the middle part of the skin edge and wrap it onto the middle part of the skeleton edge.

[0006] The automobile B-pillar upper interior trim covering and edging equipment provided by the present invention may also have such technical features, wherein the lifting assembly includes a lifting bracket and a lifting cylinder arranged on the lifting bracket, the clamping assembly includes an edging block, a clamping block, and a clamping cylinder for driving the clamping block to move it close to or away from the edging block, the edging block and the clamping block both have an avoidance notch corresponding to the step portion, for avoiding the step portion when pressing down the edging, the holding assembly includes: a mounting seat, fixed on the lifting bracket; a holding member, which is Z-shaped as a whole and has a holding portion matching the step portion, for maintaining the position of the skin portion covered on the step portion during the edging process; a plurality of mutually parallel connecting guide members, which movably connect the holding member to the mounting seat and guide the movement of the holding member; and a plurality of pressing members, for pressing the holding portion against the edge of the skin to maintain its position.

[0007] The automobile B-pillar upper interior trim laminating and edging equipment provided by the present invention may also have such technical features, wherein one end of the retaining member is the retaining portion, and the other end is the connecting portion, the connecting portion has a plurality of connecting holes, and the mounting seat has a plurality of guide holes corresponding to the connecting holes, the connecting guide member includes a cylindrical portion closed at one end and a flange formed at the closed end of the cylindrical portion, the cylindrical portion is passed through the connecting hole and the corresponding guide hole, so that the retaining member is movably set on the mounting seat, and the clamping member is a spring, which is respectively arranged in each of the cylindrical portions, one end of which abuts against the inner side of the closed end of the connecting guide member, and the other end abuts against the support ring portion.

[0008] The automobile B-pillar upper interior trim laminating and hemming equipment provided by the present invention may also have such technical features, wherein the hemming mechanism also includes a plurality of edge hemming mechanisms, each of the edge hemming mechanisms includes an edge hemming block and a front push cylinder for driving the edge hemming block to move, the upper end of the edge hemming block has a limit groove, and a limit block portion matching the limit groove is formed below the holding portion, and the control device includes: an upper mold control unit, which at least includes a lifting control unit for controlling the upper mold lifting mechanism to drive the upper mold to lift and lower; a lower mold control unit The unit at least includes a middle edging control part; and a process control unit, which is used to control the upper mold control unit and the lower mold control unit according to the process sequence, wherein the edge edging control part is used to control the front push cylinder to drive the edge edging block to push forward toward the lower mold, pressing the skin edge against the skeleton edge, and the middle edging control part is used to control the clamping assembly to clamp and release the skin edge, control the lifting assembly to drive the clamping assembly to lift and lower, and control the translation assembly to drive the clamping assembly to translate.

[0009] The automobile B-pillar upper interior trim laminating and edging equipment provided by the present invention may also have such technical features, wherein the control device also includes a storage unit for storing the process sequence and relevant parameters of each process, the process sequence includes a preparation process, a heating process, a laminating process, an edging process and a reset process, and the relevant parameters include at least multiple lifting heights of the upper mold, multiple lifting heights of the clamping assembly and multiple translation positions.

[0010] The equipment for laminating and hemming the upper interior trim parts of the automotive B-pillar provided by the present invention may also have the following technical features: the multiple lifting heights of the upper mold include, from low to high, a pressing height, a heating height, and a safety height. At the pressing height, the upper mold and the lower mold press the skeleton and the skin together; at the heating height, the upper mold and the skeleton are close to the heating unit; and at the safety height, the upper mold is located above the heating transfer portion. The multiple lifting heights of the clamping assembly include, from low to high, a hemming-in-place height, a height to be hemmed, and a maximum stretching height. At the hemming-in-place height, the lower end of the clamping assembly is lower than the edge of the skeleton placed on the lower mold; at the height to be hemmed, the lower end of the clamping assembly is flush with the edge of the skeleton placed on the lower mold; and at the maximum stretching height, the lower end of the clamping assembly is higher than the edge of the skeleton. The multiple translation positions of the clamping assembly include at least a hemming-down position, a hemming-in-place position, a hemming position, and a pull-back position. In the hemming pressing position, the lower end of the clamping assembly is closer to the middle of the frame relative to the edge of the frame; in the hemming position, the lower end of the clamping assembly is farther away from the middle of the frame relative to the edge of the frame; in the hemming position, the lower end of the clamping assembly is farther away from the middle of the frame relative to the hemming position, and the retaining portion of the retaining member abuts against the step portion; in the pulling back position, the lower end of the clamping assembly is farther away from the middle of the frame relative to the hemming position.

[0011] The automobile B-pillar upper interior trim laminating and edging equipment provided by the present invention may also have such technical features, wherein the translation assembly includes a translation servo motor, and the lifting assembly includes a first lifting cylinder and a second lifting cylinder arranged in opposite directions. In the preparation process, the process control unit controls the clamping assembly to clamp the skin edge. In the laminating process, the process control unit controls the upper mold control unit to control the upper mold lifting mechanism to drive the upper mold to press down to the clamping height, and at the same time controls the translation servo motor to drive the clamping assembly to translate to the position to be hemmed as the upper mold is pressed down. In the hemming process, the process control unit controls the clamping assembly to release the skin edge, and controls the lifting assembly and the translation assembly to respectively drive the clamping assembly to lift and translate, so that the middle part of the skin edge is bent and wrapped onto the middle part of the skeleton edge.

[0012] The automobile B-pillar upper interior trim covering and edging equipment 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 covering and edging device also has: multiple positioning pin mechanisms, which are arranged around the lower mold, for pre-positioning the skin above the lower mold; and a lower mold flipping mechanism, which is used to drive the lower mold, the edging mechanism and the positioning pin mechanism to flip as a whole. In the preparation process, the process control unit also controls the lower mold flipping mechanism to flip the lower mold, the edging mechanism and the positioning pin mechanism to a horizontal position. In the preparation process, the process control unit also controls the positioning pin mechanism to release the skin after the clamping assemblies of the multiple middle edging mechanisms clamp the skin edge.

[0013] The equipment for laminating and edging the upper interior trim of the automobile B-pillar provided by the present invention may also have the following technical features: the heating and transferring portion includes a heating unit that is movably arranged above the lower mold and a transferring motor for driving the heating unit to perform translation; the relevant parameters also include multiple translation positions of the heating unit, including an original position and a heating position. In the original position, the heating unit is located on one side of the lower mold; in the heating position, the heating unit is located above the lower mold. During the heating process, the process control unit controls the transferring motor to transfer the heating unit to the heating position, controls the upper mold lifting mechanism to lower the upper mold to the heating height, controls the heating unit to perform heating for a predetermined period of time, and controls the transferring motor to transfer the heating unit to the original position after the heating is completed.

[0014] The present invention provides a method for laminating and edging the upper interior trim of an automobile B-pillar using the above-mentioned equipment, which has the following technical features: a preparation process, placing a skeleton on the upper mold and setting the skin above the lower mold; a heating process, moving the heating transfer part between the skeleton and the skin, heating the skin and the skeleton, and resetting after heating is completed; a laminating process, pressing the upper mold downward toward the lower mold until it is pressed tightly, thereby laminating the skin and the skeleton; an edging process, multiple edging mechanisms wrap the edge of the skin onto the edge of the skeleton, wherein the middle edging mechanism clamps the middle of the edge of the skin and wraps it onto the middle of the edge of the skeleton, and in this process, the retaining component maintains the position of the skin portion wrapped on the step portion; and a resetting process, resetting the laminating and edging device.

[0015] Functions and effects of the invention

[0016] The present invention provides an apparatus and method for laminating and hemming an upper B-pillar interior trim component of an automobile. The apparatus comprises a laminating and hemming device and a control device. The laminating and hemming device comprises an upper mold, an upper mold lifting mechanism, a lower mold, multiple hemming mechanisms disposed around the lower mold, and a heating and transferring unit. The control device sequentially controls the heating and transferring unit to heat the frame and skin, controls the upper mold to press downward to laminate the skin and frame, and controls the multiple hemming mechanisms to hem the edges. Thus, the heating, laminating, and hemming processes of the frame and skin can be completed automatically, resulting in high production efficiency and minimal manual intervention. In particular, the hemming mechanism includes a central hemming mechanism designed for frames with a stepped portion on one side. The central hemming mechanism includes a retaining assembly that maintains the position of the skin portion covering the stepped portion while the control device controls the hemming mechanism to hem the frame edge. This prevents the skin portion covering the stepped portion from being pulled or pulled by the hemming operation, which could cause peeling or wrinkling of the skin portion at or near the stepped portion. This ensures that the skin is well hemmed at the stepped edge, thereby improving the appearance quality of the finished interior trim component. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural block diagram of an automobile B-pillar upper interior trim laminating and hemming equipment according to an embodiment of the present invention;

[0018] Figure 2 is a three-dimensional diagram of a laminating and hemming device according to an embodiment of the present invention;

[0019] Figure 3 3D diagram of the upper mold structure according to an embodiment of the present invention;

[0020] Figure 4 This is a three-dimensional diagram of a partial structure of a laminating and hemming device in an embodiment of the present invention;

[0021] Figure 5 is a top view of the hemming mechanism in an embodiment of the present invention;

[0022] Figure 6 1 is a top view of the hemming mechanism and the positioning needle mechanism in an embodiment of the present invention;

[0023] Figure 7 This is a three-dimensional diagram of the middle hemming mechanism in use according to an embodiment of the present invention;

[0024] Figure 8 is a cross-sectional view of the middle hemming mechanism in use in an embodiment of the present invention;

[0025] Figure 9 is a perspective view of a clamping base according to an embodiment of the present invention;

[0026] Figure 10 is a three-dimensional diagram of an edge binding block and a clamping block in an embodiment of the present invention;

[0027] Figure 11 is a three-dimensional diagram of an edge-wrapping block according to an embodiment of the present invention;

[0028] Figure 12 yes Figure 4 An enlarged view of the portion within the middle frame A;

[0029] Figure 13 is a perspective view of a retaining assembly according to an embodiment of the present invention;

[0030] Figure 14 is a structural block diagram of a control device in an embodiment of the present invention;

[0031] Figure 15 is a schematic diagram of a predetermined height and a predetermined position in an embodiment of the present invention;

[0032] Figure 16 is a flow chart of an automatic hemming method according to an embodiment of the present invention;

[0033] Figure 17 is a flow chart of a preparation process in an embodiment of the present invention;

[0034] Figure 18 This is a schematic diagram of the state of the middle hemming mechanism in the embodiment of the present invention. Figure 1 ;

[0035] Figure 19 is a flow chart of a heating process in an embodiment of the present invention;

[0036] Figure 20 is a flow chart of the laminating process in an embodiment of the present invention;

[0037] Figure 21 This is a schematic diagram of the state of the middle hemming mechanism in the embodiment of the present invention. Figure 2 ;

[0038] Figure 22 is a flow chart of the hemming process in an embodiment of the present invention;

[0039] Figure 23 This is a schematic diagram of the state of the middle hemming mechanism in the embodiment of the present invention. Figure 3 ;

[0040] Figure 24 This is a schematic diagram of the state of the middle hemming mechanism in the embodiment of the present invention. Figure 4 ;

[0041] Figure 25 This is a schematic diagram of the state of the middle hemming mechanism in the embodiment of the present invention. Figure 5 ;

[0042] Figure 26 yes Figure 25 Enlarged view of the portion inside frame C. DETAILED DESCRIPTION

[0043] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the following is a detailed description of the automobile B-pillar upper interior trim laminating and hemming equipment and method of the present invention in combination with embodiments and drawings.

[0044] <Example>

[0045] Figure 1 This is a structural block diagram of the automobile B-pillar upper interior trim laminating and hemming equipment in this embodiment.

[0046] like Figure 1 As shown, the laminating and hemming equipment for the upper B-pillar interior trim of an automobile includes a laminating and hemming device 100 and a control device 200. The laminating and hemming device 100 includes a mechanical structure for laminating and hemming, and the control device 200 is used to control the mechanical structure of the laminating and hemming device 100 according to a predetermined process flow and related parameters, thereby achieving automated processing. The control device 200 can be, for example, an industrial computer. The following will first describe the structure of the laminating and hemming device 100, and then, in conjunction with its structure, will detail the automated control implemented by the control device 200.

[0047] Figure 2 It is a three-dimensional diagram of the laminating and hemming device in this embodiment.

[0048] like Figure 2 As shown, the laminating and edging device 100 is used to laminate the skin onto the corresponding interior component frame and to hem the edge of the frame, thereby forming the upper B-pillar interior component. The frame can be made of the frame 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 (i.e., the appearance surface).

[0049] The hemming device 100 includes a frame 70 , an upper mold portion 30 , a lower mold portion 40 , and a heating and transferring portion 50 .

[0050] 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.

[0051] Figure 3 It is a three-dimensional diagram of the partial structure of the upper mold part in this embodiment.

[0052] like Figure 2 and Figure 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 .

[0053] 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.

[0054] Each upper mold unit 30A includes an upper mold support 35 , an upper mold 32 , and a plurality of pressing mechanisms 33 .

[0055] 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.

[0056] Multiple clamping mechanisms 33 are used to compress the skeleton placed on the upper mold 32 in different directions, thereby grasping the skeleton and fixing it to the upper mold 32. Each clamping mechanism 33 includes a push block and a front push cylinder that drives the push block. In this embodiment, the upper mold mechanism 30 is equipped with five clamping mechanisms 33, and corresponding front push cylinders 13-1 and 13-2, and 14-1 to 14-3 are provided, respectively, for pushing the corresponding push block toward the edge of the upper mold 32.

[0057] 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.

[0058] Figure 4 It is a three-dimensional diagram of the partial structure of the laminating and hemming device in this embodiment.

[0059] like 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).

[0060] 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.

[0061] 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.

[0062] 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, strip-like shape.

[0063] 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 2 and Figure 4 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°.

[0064] 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.

[0065] Figure 51 is a top view of the hemming mechanism in this embodiment; Figure 6 It is a top view of the hemming mechanism and the positioning needle mechanism in this embodiment.

[0066] like Figure 5 and Figure 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.

[0067] Figure 7 and Figure 8 They are respectively a stereoscopic view and a cross-sectional view of the middle hemming mechanism in use in this embodiment, and the lower mold, the surface skin and the frame are also shown in the figure.

[0068] like Figure 7 and Figure 8 As shown, the skeleton 9 is generally in the shape of a plate with both sides bent in the width direction. One surface of the skeleton is generally convex, which is the main laminating surface, and the skin is laminated on this surface; the other surface of the skeleton is generally concave, which is the secondary laminating surface, and the edge of the skin needs to be wrapped to the edge of the secondary laminating surface.

[0069] The frame 9 has two side edges, a first edge 91 and a second edge 92, with a central portion, the main plate 93. Both edges have a certain curvature along their length and a gradually varying width. When placed on the upper mold 32 (i.e., with the secondary laminating surface 9b facing upward), the two edges bend upward, with their uppermost ends closer to the center of the frame 9 than their lower ends (i.e., where they connect to the main plate).

[0070] There are multiple step portions 94 distributed at the second edge 92 . Each step portion 94 is roughly L-shaped and extends from the outermost end of the second edge 92 (the uppermost end in the figure) toward the middle of the skeleton 9 .

[0071] The central hemming mechanism 10 is used to hem the PUR fabric covering the frame, wrapping the middle edge of the fabric over the middle edge of the frame. 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. The central hemming mechanism 10 used to hem the second edge 92 further includes a retaining assembly 17.

[0072] 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.

[0073] 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 .

[0074] Figure 9 It is a three-dimensional diagram of the clamping base in this embodiment.

[0075] like Figure 9 As 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.

[0076] The support column 1211 is arranged horizontally. A mounting slot 1212 is formed in the middle of the clamping base 121 and between the two support columns 1211, tilted relative to the support columns 1211. A fixing plate 1215 is formed in the mounting slot 1212, extending approximately perpendicular to the direction of the mounting slot 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 slot 1212 for mounting guide rails to guide the clamping. The inclined surfaces 1213 are tilted relative to the length of the support column 1211, and the angle between them is approximately 60° to 80°, depending on the amount of stretch required for the skin and the dimensions of the frame's edge. After assembly, the support column 1211 is essentially horizontal, so the inclined surfaces 1213 are tilted 60° to 80° relative to the horizontal. A connecting plate 1214 is arranged horizontally and extends a considerable distance for connection to the lifting assembly 13.

[0077] Figure 10 is a three-dimensional diagram of the edging block and the clamping block in this embodiment; Figure 11 It is a three-dimensional diagram of the edge block in this embodiment.

[0078] 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 protrusion 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 a recess of other shapes, or no recess, or have other curved shapes.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] Furthermore, 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 roughly horizontal rectangular notch. The clearance groove 1226 is formed on the second extension 1223 and is a groove with a curved bottom surface. It extends in the same direction as the second extension 1223, that is, roughly vertically. 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 portion 1232 and is a roughly inclined, elongated notch. Its position and width correspond to those of the clearance groove 1226, and its width is greater than the diameter of the positioning pins. These clearance notches and clearance grooves are used to make way for the positioning pins, thereby enabling the skin edge, which is positioned and tensioned by multiple positioning pins, to be clamped without interfering with the positioning pins.

[0084] Figure 12 yes Figure 4 Enlarged view of the portion within frame A.

[0085] like Figure 12 As shown, the three hemming blocks 122 of the three central 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.

[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 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.

[0088] 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 on the horizontal plate-shaped portion. The piston rod of the cylinder faces upward and has the same inclination angle as the guide rail 1251. The piston rod of the clamping cylinder 126 is connected to the clamping block 123 through the clamping transmission member 124, and 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.

[0089] 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.

[0090] 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 .

[0091] 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.

[0092] 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.

[0093] 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.

[0094] 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.

[0095] 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 and a synchronous pulley (not shown in the figure).

[0096] 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 can be 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.

[0097] 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.

[0098] A synchronous belt and pulleys are used to transmit power between the translational servo electrode 142 and the lead screw 143, miniaturizing the overall dimensions of the central hemming mechanism 10. One synchronous pulley is mounted on the output shaft of the servo motor 142, while the other is mounted on one end of the lead screw 143. Both pulleys are positioned in a roughly aligned vertical direction. A synchronous belt is fitted over these pulleys, allowing the servo motor 142 to drive the lead screw 143 through the belt structure.

[0099] 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.

[0100] 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.

[0101] 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.

[0102] 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.

[0103] Figure 13 3D is a perspective view of the retaining assembly in this embodiment.

[0104] like Figure 13 As shown, the retaining assembly 17 includes a mounting seat 171, a retaining member 172, a connecting guide member 173 and a pressing member (not shown in the figure).

[0105] The mounting base 171 is an L-shaped block fixed to the end of the bottom plate 1311 of the lifting bracket 131 facing the lower mold 42. The mounting base 171 has a plurality of guide holes 1711 facing the lower mold 42. The guide holes 1711 are relatively deep and have a raised annular support ring inside.

[0106] The retaining member 172 (insert) is used to press the epidermis at the stepped edge, thereby maintaining a good fit of the epidermis at this position during the edging process. The retaining member 172 is a special-shaped member that is roughly Z-shaped as a whole, including a connecting portion 1721, a first extension portion 1722, a second extension portion 1723, and a retaining portion 1724. The connecting portion 1721 is in the shape of a rectangular block and is provided with a plurality of connecting holes. The connecting holes correspond to the guide holes 1721, and their number, distribution, inner diameter of each hole, and direction are consistent. The first extension portion 1722 is close to a wedge shape and extends from the upper end of the connecting portion 1721 roughly along the axial direction of the connecting hole. The second extension portion 1723 is roughly in the shape of a rectangular plate and further extends from one end of the first extension portion 1722, and a bending portion is formed between the two, and the angle between the extension directions of the two is an obtuse angle. The retaining portion 1724 is roughly in the shape of a step block, further extending from one end of the second extension portion 1723, and a bend is formed between the two. The angle between the extension directions of the two is an obtuse angle, and the portion of the retaining portion 1714 near the connection position between the two is relatively thicker, so a protruding limit block portion 1725 is formed below the retaining portion 1724. After assembly, the extension direction of the retaining portion 1724 is roughly horizontal. The outer end of the retaining portion 1724 has a roughly vertical first end face 1724a and a second end face 1724b inclined toward the lower mold 42. These two end faces are used for the epidermis at the step portion 94. There is a smooth transition between the two end faces and between the two end faces and other surfaces to avoid damaging the epidermis.

[0107] Multiple connecting guides 173 are used to movably connect the retaining member 172 to the mounting base 171 and guide the movement of the retaining member 172. Each connecting guide 173 comprises a cylindrical portion with one end closed and a flange formed at one end of the cylindrical portion. The cylindrical portion mates with the guide hole 1711. The multiple connecting guides 173 pass through the connecting holes in the connecting portion 1721 and the corresponding guide holes 1711, thereby connecting the retaining member 172 to the mounting base 171. After assembly, the connecting guides 173 are arranged generally horizontally.

[0108] The pressing member is used to press the retaining member 172 onto the epidermis at the stepped edge. In this embodiment, the pressing member is a plurality of springs, which are respectively arranged inside each connecting guide member 173, one end of which abuts against the inner side of the closed end of the connecting guide member 173, and the other end abuts against the support ring portion in the guide hole 1711, thereby driving the retaining member 172 to press the epidermis through the spring force.

[0109] In addition, the edge edging block 61 has a pressing surface that matches the shape of the edge of one side of the frame, which is used to press the skin against the edge of one side of the frame, and the upper end of the edge edging block 61 has a limiting groove 611 that matches the limiting block portion 1725. When the retaining member 172 moves toward the step portion of the frame, the limiting block portion 1725 will be embedded in the limiting groove 611 and abut against its groove wall, thereby preventing the retaining member 172 from applying excessive force to the skin.

[0110] like Figure 10 and Figure 11 As shown, the outer end of the edging block 122 also has a clearance notch 1229, and the outer end of the clamping block 123 also has a clearance notch 1239. The shapes and positions of these two notches correspond to the shapes and positions of the step portion 94 respectively, and the depth of the notch corresponds to the predetermined edging lowering height. Therefore, the clamping assembly 12 will not be obstructed by the step portion 94 when the edging is lowered.

[0111] 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.

[0112] The edge hemming mechanism 60 can also adopt a corresponding structure in the prior art. In this embodiment, it includes an edge hemming block 61 and a front push cylinder. The edge hemming block 61 is long and 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.

[0113] 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).

[0114] 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 .

[0115] 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.

[0116] 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.

[0117] 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.

[0118] The sensor assembly 80 includes a skeleton sensor, a skin sensor, and multiple cylinder sensor assemblies.

[0119] The skeleton sensor is disposed on the upper mold 32, for example, in a corresponding slot or hole on the upper mold 32, with its detection end facing outward. It can detect whether a skeleton is placed on the upper mold 32 and generate a corresponding skeleton detection signal when a skeleton is detected. The skeleton sensor can be, for example, a photoelectric sensor or a proximity sensor.

[0120] The skin sensor is disposed on the lower mold 42, for example, in a corresponding slot or hole on the lower mold 42, with its detection end facing outward. The sensor can detect whether a skin is placed at a predetermined distance above the lower mold 42 and generate a corresponding skin detection signal when the skin is detected. The skin sensor can be, for example, a photoelectric sensor or a proximity sensor.

[0121] Multiple cylinder sensor assemblies are installed on each cylinder (such as the aforementioned push cylinder, clamping cylinder, and lifting cylinder), or at least on some of the more important cylinders. They are used to detect whether the cylinder is fully reset and in place. When the cylinder is reset (piston rod retracted), a corresponding cylinder reset signal is generated. When the cylinder is in place (piston rod extended), a corresponding cylinder in place signal is generated. Cylinder sensor assemblies usually use magnetic switches, but proximity switches or photoelectric sensors can also be used.

[0122] Figure 14 It is a structural block diagram of the control device in this embodiment.

[0123] like Figure 14 As shown, the control device 200 includes a storage unit 210, a signal receiving unit 220, an upper mold control unit 230, a lower mold control unit 240, a heating control unit 250, a process control unit 260, a start-stop control unit 270, and a general control unit 280 for coordinating and controlling the above units.

[0124] The storage unit 210 is used to store the data required for laminating and hemming, including the process sequence and parameters associated with each process. In this embodiment, the processes sequentially include a preparation process, a heating process, a laminating process, an hemming process, and a reset process. The parameters for each process include the identification numbers of the motors and cylinders involved in the process, the target position, the target height, and the corresponding motor operating parameters.

[0125] Figure 15 is a schematic diagram of the predetermined height and predetermined position in this embodiment, Figure 15 The various heights and positions in the figure are for illustration only, mainly to show the relative position / relative height relationship. In actual applications, the specific values ​​can be adjusted as needed.

[0126] like Figure 15 As shown, in this embodiment, the storage unit 210 stores a plurality of predetermined heights of the clamping assembly 12 and corresponding cylinder control parameters, a plurality of predetermined positions and corresponding translation servo motor control parameters in the hemming process S4.

[0127] From low to high, 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 (10mm higher than the edge of the frame). The corresponding relationship between each height and the action of the two lifting cylinders is as described above.

[0128] Taking the horizontal distance at the edge of the skeleton as the origin position P3 (0mm), multiple predetermined positions include the retreat 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).

[0129] Furthermore, the storage unit 210 stores multiple predetermined heights for the upper mold 32 during each process, along with the corresponding control parameters for the lifting servo motor. These parameters, arranged in ascending order, include a pressing height h1, a heating height h2, and a downward pressure safety height h3. At the pressing height h1, the upper mold 32 and lower mold 42 press the skin and frame together. At the heating height h2, the upper mold 32 and frame are partially positioned within the transplant frame 51, as close as possible to the heating lamps 52. At the downward pressure safety height h3, the upper mold 32 is depressed a certain distance, but the lower mold 32 remains above the transplant frame 51, preventing interference with the translational movement of the heating and transplanting unit 50.

[0130] In addition, the storage unit 210 also stores two predetermined positions of the heating transfer part 50 in the heating process, namely the original position (located beside the lower mold and not blocked between the upper and lower molds) and the heating position (located between the upper and lower molds).

[0131] The signal receiving unit 220 is used to receive sensing signals from the above-mentioned various sensors, including the above-mentioned skeleton detection signal, skin detection signal, cylinder reset signal, and cylinder in-position signal, so as to perform corresponding control based on these signals.

[0132] The upper mold control unit 230 is used to control the operation of the upper mold 30 and includes a lift control unit 231 and a pressure release control unit 232. The lift control unit 231 controls the upper mold lift mechanism 34 to move the upper mold 32 up and down. The pressure release control unit 232 controls the various clamping mechanisms 33 to tighten or loosen the frame.

[0133] The lower mold control unit 240 includes a flipping control unit 241, a positioning needle control unit 242, a middle edging control unit 243, a side edging control unit 244, and a corner edging control unit 245, which are respectively used to control the lower mold flipping mechanism 43 to flip the lower mold 42 and the positioning needle mechanism, the edging mechanism, etc. as a whole, control the positioning needle cylinder to drive the positioning needle 441 to rise and fall, control the middle edging mechanism 10 to perform edging, control the side edging mechanism 60 to perform edging, and control the corner edging mechanism 20 to perform edging.

[0134] The heating control unit 250 includes a moving control unit 251 and a heating control unit 252. The moving control unit 251 controls the moving motor 54 to drive the translation mechanism 53, thereby moving the heating lamp 52 to its original position or heating position. The heating control unit 252 controls the heating lamp 52 to illuminate for a predetermined duration.

[0135] The process control unit 260 controls the upper mold control unit 230, lower mold control unit 240, and heating control unit 250 accordingly based on the process sequence and relevant parameters of each process stored in the storage unit 210, as well as the signals received by the signal receiving unit 220, thereby achieving automatic lamination and hemming. In this embodiment, corresponding to the above-mentioned processes, the process control unit 260 includes a preparation control unit 261, a heating control unit 262, a lamination control unit 263, an hemming control unit 264, a reset control unit 265, and an alarm control unit 266, which is used to generate corresponding alarm information when the corresponding sensor signal is not received or is received inconsistently during the corresponding process, so as to remind the worker to verify. The specific control process of each of the above-mentioned control units will be further described in detail in the method below.

[0136] The start / stop control unit 270 is used by workers or relevant control and management personnel to start and stop the automatic laminating and hemming process. It may include, for example, a start button and a stop button, or may be in the form of a touch screen. The start / stop control unit 270 starts the automatic laminating and hemming process after manual operation and when both the skeleton detection signal and the skin detection signal have been received.

[0137] Figure 16 4 is a flow chart of the automatic hemming method in this embodiment.

[0138] like Figure 16 As shown, based on the above-mentioned automatic laminating and hemming equipment for the middle interior parts of the automobile B-pillar, the automatic laminating and hemming method implemented by the equipment includes the following steps:

[0139] In preparation step S1, the skeleton is placed and secured in the upper mold 32. Multiple positioning pin mechanisms 44 are used to pre-position the skin over the lower mold 42, and the automatic lamination and hemming process is initiated. During this process, the equipment is in the reset state, and the lower mold 42 and its surrounding positioning pin mechanisms, hemming mechanism, and other components are tilted as a whole.

[0140] Figure 17 It is a flow chart of the preparation process in this embodiment.

[0141] like Figure 17 As shown, the specific process of the preparation process S1 is controlled by the preparation control unit 261 and includes the following sub-processes:

[0142] S1-1, manually place the skeleton on the upper mold, the skeleton sensor detects the skeleton, the control device 200 receives the skeleton detection signal, and the pressing and releasing control part 232 of the upper mold control unit 230 controls each pressing mechanism 33 to press the skeleton.

[0143] S1-2, manually hang the skin on each positioning pin 441 and confirm that the skin is laid flat. The skin sensor detects the skin and the control device 200 receives the skin detection signal.

[0144] S1-3, manually start the automatic laminating and hemming process through the start-stop control unit 270.

[0145] S1-4, the middle hemming control unit 243 controls the clamping components 12 of each middle hemming mechanism 10 to clamp the skin edge (clamping cylinders 2-n, 6-n are in place).

[0146] S1-5, the turning control unit 241 controls the lower mold turning mechanism 43 to turn the lower mold 42 and the hemming mechanism to a horizontal position.

[0147] Figure 18 This is a schematic diagram of the state of the middle hemming mechanism in this embodiment. Figure 1, the figure also shows the lower mold, skin and frame next to the middle edging mechanism (the frame is actually fixed on the upper mold, which is not shown in the figure).

[0148] like Figure 18 As shown, in step S1, the skin 8 is positioned above the lower die 42 and is tensioned by a plurality of positioning pins 441, temporarily preventing the skin from contacting the lower die 42. Then, the clamping cylinder 126 of the middle hemming mechanism 10 drives the clamping block 123 toward the hemming block 122, causing the clamping assembly 12 to clamp the skin edge 81.

[0149] In the heating step S2 , the heating transfer unit 50 moves between the upper mold 32 and the lower mold 42 to heat the skin and the skeleton, and then returns to its original position after the heating is completed.

[0150] Figure 19 It is a flow chart of the heating process in this embodiment.

[0151] like Figure 19 As shown, the specific process of the heating process S2 is controlled by the heating control unit 262 and includes the following sub-processes:

[0152] S2-1, the lifting control unit 231 controls the lifting servo motor 341 to drive the upper mold 32 down to the safety height h3.

[0153] S2-2, the transplanting control unit 251 controls the transplanting motor 54 to drive the transplanting frame 51 and the heating lamp 52 to move horizontally to the heating position (between the upper and lower molds).

[0154] In step S2-3, the positioning pin control unit 242 controls the positioning pin cylinder 11-n to move the positioning pin 441 downward, disengaging the positioning pin from the skin (the positioning pin cylinder is in place). At this point, the skin is only clamped by the clamping assemblies 12 of the multiple middle hemming mechanisms 10, which still hold the skin above the lower mold 42. Alternatively, in step S1, the positioning pins can be withdrawn after the clamping assemblies 12 have clamped the skin.

[0155] S2-4, the lifting control part 2432 of the middle edging control part 243 controls the lifting assembly 14, so that the clamping assembly 12 and the clamped skin edge rise to the maximum stretching height H3 (lifting cylinders 3-n, 7-n, 4-n, 8-n are in place).

[0156] S2-5, the lifting control unit 231 controls the lifting servo motor 341 to drive the upper mold 32 down to the heating height h2.

[0157] S2-6, the heating control unit 252 controls the plurality of heating lamps 52 to heat for 12 seconds.

[0158] S2-7, after heating is completed, the lifting control unit 231 controls the lifting servo motor 341 to drive the upper mold 32 to rise to the safety height h3.

[0159] S2-8, the transplanting control unit 251 controls the transplanting motor 54 to drive the transplanting frame 51 and the heating lamp 52 to move horizontally to the original position.

[0160] Among them, S2-1 to S2-4 can be performed simultaneously.

[0161] In the laminating step S3 , the upper mold 32 is pressed toward the lower mold 42 to laminate the skin and the frame, and at the same time, the middle hemming mechanism 10 is pressed down with the upper mold 32 into the position to be hemmed.

[0162] Figure 20 1 is a flow chart of the laminating process in this embodiment.

[0163] like Figure 20 As shown, the specific process of the laminating step S3 is controlled by the laminating control unit 263 and includes the following sub-steps:

[0164] S3-1, the translation control part 2433 of the middle hemming control part 243 controls the translation servo motor 142 to drive the clamping assembly 12 to retreat to the retraction position P6 to tighten the skin.

[0165] S3-2, the lifting control part 231 controls the lifting servo motor 341 to drive the upper mold 32 to descend to the clamping height h1, and at the same time the translation control part 2433 controls the translation servo motor 142 to drive the clamping assembly 12 to move forward to the hemming position P4.

[0166] Figure 21 This is a schematic diagram of the state of the middle hemming mechanism in this embodiment. Figure 2 .

[0167] like Figure 21 As shown, in step S4, when the upper mold 32 is pressed down, the translation servo motor 142 drives the clamping assembly 12 to advance to the predetermined edge-wrapped position P4, and the height difference between the skin edge and the frame edge is still about 10 mm.

[0168] In the edging process S4, multiple edging mechanisms respectively wrap the skin edges at corresponding positions onto the edges of the skeleton, wherein the middle edging mechanism 10 wraps the middle of the skin edge onto the middle of the edge on one side of the skeleton, and during the edging process, the position of the skin edge portion wrapped on the step portion of the skeleton is maintained by the retaining component 17.

[0169] Figure 22 1 is a flow chart of the hemming process in this embodiment.

[0170] like Figure 22 As shown, the specific process of the hemming process S4 is controlled by the hemming control unit 264 and includes the following sub-processes:

[0171] S4-1, the edge hemming control unit 244 controls the front push cylinders of each edge hemming mechanism 60 to drive its edge hemming block to push forward, pressing the skin tightly against the edges on both sides of the skeleton (the front push cylinders 11-n are in place).

[0172] S4-2, the clamping and releasing control part 2431 controls the clamping components 12 of each middle hemming mechanism 10 to release the skin edge (the clamping cylinders 2-n, 6-n are in place).

[0173] S4-3, the corner edging control unit 245 controls the front push cylinders of each corner edging mechanism 20 to drive its corner edging block forward, pressing the skin tightly against the corner of the skeleton (the front push cylinder 5-n is in place).

[0174] S4-4, the lifting control part 2432 controls the lifting components 13 of each middle hemming mechanism 10 to drive its clamping component 12 to descend to the height H2 to be hemmed (the lifting cylinders 3-n and 7-n are in place).

[0175] At step S4-5, the translation control unit 2433 controls the translation assembly 14 of each middle hemming mechanism 10 to drive its clamping assembly 12 to the hemming downward pressing position P2, thereby pushing the skin edge to the other side of the frame (the secondary hemming surface side of the frame). Part of the skin edge is wrapped around the step 94, and the translation servo motor 142 is controlled to open the brake. At this time, the guide wheel 152 contacts the top of the guide surface 1511a.

[0176] S4-6: The lift control unit 2432 controls the lift assembly 13 of each central hemming mechanism to lower its clamping assembly 12 to the hemming height H1 (lift cylinders 4-n and 8-n are in their original positions). The oblique withdrawal guide assembly 15 guides (guide wheel 152 rolls along guide surface 1511a), causing the clamping assembly 12 to withdraw obliquely. Simultaneously, the translation servo motor 142 follows, thereby bending the middle portion of the skin edge over the middle portion of the frame edge and obliquely attaching the middle portion of the skin edge to the middle portion of the other side (the secondary hemming side) of the frame. During this process, the retaining assembly 17 maintains the position of the skin portion on the step 94.

[0177] S4-7, the corner edging control unit 245 controls the forward pushing mechanism to push two of the corner edging mechanisms 20 forward (the forward pushing cylinders 9-n and 10-n are in place), pressing the skin tightly against the corners of the skeleton.

[0178] S4-8, wait for 25 seconds, that is, maintain the pressure of the above-mentioned front push cylinders for a certain period of time, thereby completing the hemming.

[0179] Among them, S4-2 to S4-4 can be performed simultaneously.

[0180] like Figure 21As shown, in step S4, the front push cylinders of each corner hemming mechanism 20 and the side hemming mechanism 60 respectively drive their corner hemming blocks and side hemming blocks to press the skin tightly against the corner edges of the frame.

[0181] Figure 23 This is a schematic diagram of the state of the middle hemming mechanism in this embodiment. Figure 3 .

[0182] like Figure 23 As shown, the clamping cylinder 126 then 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 portion (third extension portion 1224) of the hemming block 122.

[0183] Figure 24 This is a schematic diagram of the state of the middle hemming mechanism in this embodiment. Figure 4 .

[0184] like Figure 24 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. Then, the servo motor 142 drives the clamping assembly 12 forward to the predetermined hemming pressing position P2, so that the hemming block 122 pushes the skin edge and rolls the skin edge to the other side of the frame edge (that is, rolls the skin edge to the edge of the secondary overlapping surface 9b of the frame 9). The bottom surface 1224a of the hemming block 122 contacts the non-overlapping surface of the skin 8, pressing the skin edge 81 against the upper end of the edge of the frame. At the same time, part of the skin edge is pushed onto the step portion 94. At this time, the guide wheel 152 is roughly in contact with the upper end of the guide surface 1511a of the oblique guide member 151.

[0185] Figure 25 This is a schematic diagram of the state of the middle hemming mechanism in this embodiment. Figure 5 , Figure 26 yes Figure 5 An enlarged view of the inner part of the middle frame C, Figure 26 The figure shows the shape of the middle of the skeleton edge and the middle of the epidermis edge after the hemming is completed.

[0186] like Figure 25 and Figure 26As 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, playing a guiding role. At the same time, the translation servo motor 142 follows, causing the clamping assembly 12 to retreat in an inclined backward direction. The hemming inclined surface 1223a of the hemming block 122 presses the skin edge 81 downwardly against the edge portion of the secondary overlapping surface 9b of the frame 9, thereby completing the hemming operation with a small amount of stretching of the skin 8. During this process, the pressure provided by the pressing member (spring) causes the retaining portion 1724 of the retaining member 172 to always press against the skin portion wrapped on the step portion 94, thereby maintaining the position of the skin portion during the hemming process.

[0187] In the reset step S5, the reset control unit 265 controls each mechanism to reset. Specifically, the lift control unit 231 controls the upper die lift mechanism 34 to raise the upper die 32 to its original height. The translation control unit 2433 controls the clamping assemblies 12 of each central hemming mechanism 10 to retract to the hemming position P5. The equipment returns to its origin.

[0188] In the above process, if the skeleton / skin is not detected in process S1, or the corresponding cylinder in-position / reset signal is not received in each process, or the received motor feedback signal is abnormal, the start-stop control unit 270 will stop the automatic lamination and hemming process, and the alarm control unit 266 will generate corresponding alarm information based on the sensor signal. The worker can eliminate the problem accordingly, or take away the workpiece, return the equipment to the origin, and then restart a new round of lamination and hemming process.

[0189] Functions and Effects of the Embodiments

[0190] The apparatus and method for laminating and hemming an upper B-pillar interior trim component provided in this embodiment include a laminating and hemming device and a control device. The laminating and hemming device includes an upper mold, an upper mold lifting mechanism, a lower mold, multiple hemming mechanisms disposed around the lower mold, and a heating and transferring unit. The control device sequentially controls the heating and transferring unit to heat the frame and skin, controls the upper mold to press downward to laminate the skin and frame, and controls the multiple hemming mechanisms to hem the edges. Thus, the heating, laminating, and hemming processes of the frame and skin can be completed automatically, resulting in high production efficiency and minimal manual intervention. In particular, the hemming mechanism includes a central hemming mechanism designed for frames with a stepped portion on one side. The central hemming mechanism includes a retaining assembly that maintains the position of the skin portion covering the stepped portion while the control device controls the hemming mechanism to hem the frame edge. This prevents the skin portion covering the stepped portion from being pulled or pulled during the hemming operation, which could cause peeling or wrinkling of the skin portion at or near the stepped portion. This ensures that the skin is well hemmed even at the stepped edge, improving the appearance quality of the finished interior trim component.

[0191] In an embodiment, the retaining assembly has a mounting seat, a retaining member, a connecting guide member, and a pressing member, and the retaining member is Z-shaped, with a retaining portion at one end matching the step portion on the skeleton. Therefore, the retaining member can only move in a predetermined direction through the guiding action of the connecting guide member, and the pressure provided by the pressing member can enable the retaining member to maintain the effect of pressing the edge of the skin.

[0192] Furthermore, a limiting groove is provided at the upper end of the edge edging block for pressing the edge of the epidermis, and a matching limiting block portion is formed below the retaining portion of the retaining member, thereby limiting the movement of the retaining member toward the skeleton so that it does not exert excessive pressure on the epidermis.

[0193] Furthermore, in the retaining assembly, the clamping part is a spring, so the spring force of multiple springs can be used to maintain the effect of clamping the edge of the skin covered at the step, and when the clamping assembly moves back and forth with the clamped edge of the skin, the spring force can adaptively maintain the clamping effect, and no complex electrical control is required to achieve such a clamping effect, thereby simplifying the relevant automation control.

[0194] In the embodiment, the middle hemming mechanism also has an oblique withdrawal guide assembly, including an inclined guide surface and a guide wheel that can roll along the guide surface, and the translation assembly adopts a translation servo motor. Therefore, when the lifting assembly drives the clamping assembly to descend for hemming, under the guidance of the oblique withdrawal guide assembly, the clamping assembly can be withdrawn in an oblique downward direction relative to the lower mold, and at the same time the translation servo motor can follow, so that the edge of the skin can be smoothly attached to the inner side of the edge of the skeleton along the oblique line, so that hemming can be achieved when the stretching amount of the PUR fabric skin is small, avoiding the situation where the texture of the skin of this type of fabric is messy due to large stretching, thereby ensuring the beautiful appearance of the finished product.

[0195] Furthermore, the clamping assembly includes a edging block and a clamping block. The outer end of the edging block is Z-shaped, while the outer end of the clamping block is L-shaped at an obtuse angle that matches the outer end of the edging block. Both edges have a curved shape that matches the edge of the frame. Multiple edging blocks and clamping blocks on each side of the device are closely arranged in sequence, and their outer edges are connected in sequence to form a curved shape that matches the edge of the frame. This not only effectively clamps the surface, making it less likely to slip during the edging process, but also better edging frames with specific edge shapes, resulting in a better appearance of the interior trim after edging. In addition, both the edging block and the clamping block have avoidance notches, ensuring that the edging process is not hindered by the step portion.

[0196] 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.

[0197] 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.

[0198] 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.

[0199] 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. The control device only needs to control the two lifting cylinders to be in place and reset according to the required height.

[0200] 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.

[0201] Furthermore, servo motors are used to control the lifting and translation of the upper mold lifting mechanism, the heating and transferring part, and the translation components of the middle edging mechanism, and the control device pre-stores the process sequence and relevant parameters of each process, including multiple lifting heights, translation positions and corresponding servo motor control parameters. Therefore, the height and position of the upper mold, heating unit, and clamping assembly in each process can be conveniently and accurately controlled, thereby improving the yield and the quality of the produced interior parts.

[0202] Among them, especially for the height and position control of the clamping component, there are the edge-wrapping height, the edge-to-be-wrapped height, and the maximum stretching height, and the maximum stretching height does not exceed 10mm; there are the backward limit position, the edge-wrapping pressing position, the edge-to-be-wrapped position, the edge-wrapping position, and the pull-back position. Through these heights and positions, the skin can be accurately tensioned, pulled to the top of the edge of the skeleton, pushed to the other side of the skeleton, and pressed down to the edge of the other side of the skeleton. The control accuracy is high, which is beneficial to improving the quality of the final product. Moreover, since each translation position is achieved by controlling the servo motor, the corresponding servo motor control parameters can be pre-stored or set in the control device. Therefore, for PUR fabric skins with different performance parameters, or skeletons with different edge structures, the specific values ​​of each position can be adjusted very conveniently, so that the equipment has a wide range of applications and can adapt to the processing needs of various automotive B-pillar middle interior parts.

[0203] In one embodiment, the laminating and hemming device comprises two mirror-symmetrical sets of upper mold units, lower mold units, and heating units. This allows for the simultaneous production of two mirror-symmetrical automotive B-pillar center interior trim pieces. Since two mirror-symmetrical pieces of such interior trim pieces are required for a single vehicle, this arrangement is highly advantageous, improving production efficiency and ensuring consistency across a pair of interior trim pieces within a vehicle, enhancing the visual quality of the vehicle's interior. Furthermore, since the two sets share the upper mold lifting mechanism, transfer frame, and transfer motor, the dual configuration does not increase the complexity of automated control.

[0204] 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.

[0205] 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 laminating and hemming device for an upper B-pillar interior part of an automobile, used for wrapping the surface of a PUR fabric onto a frame to form an upper B-pillar interior part of an automobile, wherein one side edge of the frame has multiple steps extending toward the middle of the frame, characterized in that: include: A wrapping device for wrapping the skin onto the frame; as well as A control device for controlling the laminating and hemming device according to a predetermined process sequence, Wherein, the laminating and hemming device comprises: an upper mold for carrying the skeleton; An upper die lifting mechanism, used for driving the upper die to move up and down; A lower mold, used for cooperating with the upper mold to laminate the skin and the frame; a heating transplanting portion, disposed above the lower mold, for heating the skeleton and the skin; and A plurality of hemming mechanisms are arranged around the lower mold for wrapping the skin edge onto the frame edge, including at least one middle hemming mechanism, which is arranged corresponding to the step portion, and includes a clamping assembly for clamping the middle portion of the skin edge, a lifting assembly for driving the clamping assembly to rise and fall, a translation assembly for driving the clamping assembly to translate relative to the lower mold, and a holding assembly for keeping the skin portion wrapped on the step portion during the hemming process. The control performed by the control device at least includes: Controlling the heating transplanting part to heat the skin and the skeleton, and resetting them after heating is completed; Controlling the upper mold on which the skeleton is placed to press downward toward the lower mold on which the skin is provided, thereby overlapping the skin with the skeleton; and The plurality of edging mechanisms are controlled to wrap the skin edge onto the skeleton edge, wherein the middle edging mechanism is controlled to clamp the middle of the skin edge and wrap it onto the middle of the skeleton edge.

2. The automobile B-pillar upper interior trim laminating and hemming equipment according to claim 1, Its characteristics are: in, The lifting assembly includes a lifting bracket and a lifting cylinder arranged on the lifting bracket. The clamping assembly includes a mutually matching edge-wrapping block, a clamping block, and a clamping cylinder for driving the clamping block to move closer to or away from the edge-wrapping block. The edge wrapping block and the clamping block are both provided with an avoidance notch corresponding to the step portion, for avoiding the step portion when pressing down the edge wrapping. The retaining assembly comprises: A mounting base, fixed on the lifting bracket; A retaining member, which is in a Z-shape as a whole and has a retaining portion that matches the step portion, and is used to maintain the position of the skin portion covered on the step portion during the hemming process; a plurality of mutually parallel connecting guide members, which movably connect the retaining member to the mounting seat and guide the movement of the retaining member; and A plurality of pressing members are used to press the retaining portion onto the edge of the skin to maintain its position.

3. The automobile B-pillar upper interior trim laminating and hemming equipment according to claim 2, characterized in that: in, One end of the retaining member is the retaining portion, and the other end is a connecting portion, wherein the connecting portion has a plurality of connecting holes. The mounting seat has a plurality of guide holes corresponding to the connecting holes, and a raised support ring portion is formed in the guide holes. The connecting guide member includes a cylindrical portion with one end closed and a flange formed at the closed end of the cylindrical portion. The cylindrical portion is inserted into the connecting hole and the corresponding guide hole, so that the retaining member is movably arranged on the mounting seat. The pressing member is a spring, which is respectively arranged in each of the cylindrical parts, one end of which abuts against the inner side of the closed end of the connecting guide member, and the other end abuts against the supporting ring portion.

4. The automobile B-pillar upper interior trim laminating and hemming equipment according to claim 1, Its characteristics are: in, The edge binding mechanism also includes a plurality of edge binding mechanisms, Each of the edge hemming mechanisms includes an edge hemming block and a front push cylinder for driving the edge hemming block to move, and the upper end of the edge hemming block has a limiting groove. A limiting block portion matching the limiting groove is formed below the holding portion. The control device comprises: An upper mold control unit, comprising at least a lifting control unit, configured to control the upper mold lifting mechanism to drive the upper mold to move up and down; A lower die control unit, comprising at least a middle edge wrapping control unit; and A process control unit is used to control the upper mold control unit and the lower mold control unit according to the process sequence, The edge wrapping control unit is used to control the forward push cylinder to drive the edge wrapping block to push forward toward the lower mold, pressing the skin edge tightly against the frame edge. The middle edge wrapping control part is used to control the clamping assembly to clamp and release the skin edge, control the lifting assembly to drive the clamping assembly to lift and lower, and control the translation assembly to drive the clamping assembly to translate.

5. The automobile B-pillar upper interior trim laminating and hemming equipment according to claim 4, characterized in that: in, The control device further includes a storage unit for storing the process sequence and relevant parameters of each process. The process sequence includes a preparation process, a heating process, a lamination process, an edge wrapping process and a reset process. The related parameters include at least a plurality of lifting heights of the upper mold, a plurality of lifting heights of the clamping assembly, and a plurality of translation positions.

6. The automobile B-pillar upper interior trim laminating and hemming equipment according to claim 5, Its characteristics are: in, The multiple lifting heights of the upper mold include: pressing height, heating height, and safety height from low to high. At the pressing height, the upper mold and the lower mold press the skeleton and the skin tightly; at the heating height, the upper mold and the skeleton are close to the heating unit; at the safety height, the upper mold is located above the heating transplanting part. The multiple lifting heights of the clamping assembly include, from low to high, the hemming height, the height to be hemmed, and the maximum stretching height. At the hemming height, the lower end of the clamping assembly is lower than the edge of the frame placed on the lower die; at the hemming height, the lower end of the clamping assembly is flush with the edge of the frame placed on the lower die; at the maximum stretching height, the lower end of the clamping assembly is higher than the edge of the frame. The multiple translation positions of the clamping assembly include at least a hemming pressing position, a hemming waiting position, an hemming position, and a pull-back position. In the hemming pressing position, the lower end of the clamping assembly is closer to the middle of the frame relative to the edge of the frame; in the hemming position, the lower end of the clamping assembly is farther away from the middle of the frame relative to the edge of the frame; in the hemming position, the lower end of the clamping assembly is farther away from the middle of the frame relative to the hemming position, and the retaining portion of the retaining member abuts against the step portion; in the pulling back position, the lower end of the clamping assembly is farther away from the middle of the frame relative to the hemming position.

7. The automobile B-pillar upper interior trim laminating and hemming equipment according to claim 6, characterized in that: in, The translation assembly includes a translation servo motor, The lifting assembly includes a first lifting cylinder and a second lifting cylinder arranged in opposite directions. In the preparation process, the process control unit controls the clamping assembly to clamp the skin edge. During the laminating process, the process control unit controls the upper die control unit to control the upper die lifting mechanism to drive the upper die to be pressed down to the pressing height, and at the same time, controls the translation servo motor to drive the clamping assembly to translate to the position to be hemmed as the upper die is pressed down. During the edging process, the process control unit controls the clamping assembly to loosen the skin edge, and controls the lifting assembly and the translation assembly to respectively drive the clamping assembly to lift and translate, so as to bend the middle part of the skin edge to wrap around the middle part of the skeleton edge.

8. The automobile B-pillar upper interior trim laminating and hemming equipment according to claim 7, 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. The laminating and hemming device further comprises: a plurality of positioning pin mechanisms, arranged around the lower mold, for pre-positioning the skin above the lower mold; and The lower mold flipping mechanism is used to drive the lower mold, the hemming mechanism and the positioning needle mechanism to flip as a whole. In the preparation process, the process control unit further controls the lower mold flipping mechanism to flip the lower mold, the hemming mechanism and the positioning pin mechanism to a horizontal position. In the preparation process, the process control unit further controls the positioning needle mechanism to release the skin after the clamping components of the plurality of middle hemming mechanisms clamp the skin edge.

9. The automobile B-pillar upper interior trim laminating and hemming equipment according to claim 5, characterized in that: in, The heating and transplanting part includes a heating unit that is arranged above the lower mold in a translational manner and a transplanting motor for driving the heating unit to translate. The related parameters also include a plurality of translation positions of the heating unit, which include an original position, a heating position, In the original position, the heating unit is located on one side of the lower mold; in the heating position, the heating unit is located above the lower mold. During the heating process, the process control unit controls the transplanting motor to transplant the heating unit to the heating position, controls the upper mold lifting mechanism to lower the upper mold to the heating height, and then controls the heating unit to heat for a predetermined time. After the heating is completed, the transplanting motor is controlled to transplant the heating unit to the original position.

10. A method for laminating and hemming an automobile B-pillar upper interior trim using the automatic laminating and hemming equipment according to any one of claims 1 to 9, characterized in that: include: Preparation step: placing the skeleton on the upper mold and placing the skin on the lower mold; a heating step, wherein the heating transplanting portion moves between the skeleton and the skin, heats the skin and the skeleton, and resets the skeleton after heating is completed; a laminating step, wherein the upper mold is pressed downward toward the lower mold until it is tightly pressed, thereby laminating the skin and the frame; a hemming process, wherein the plurality of hemming mechanisms wrap the skin edge onto the frame edge, wherein the middle hemming mechanism clamps the middle portion of the skin edge and wraps it onto the middle portion of the frame edge, and during this process, the retaining assembly maintains the position of the skin portion wrapped on the step portion; and In the resetting process, the laminating and hemming device is reset.

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