Edge wrapping mechanism imitating hand-like grasping and its edge wrapping method

Abstract

The present invention provides a hemming mechanism imitating hand-shaped grasping and a hemming method thereof, which are used for hemming the transition edge adhered to the automotive armrest skeleton. The transition edge is S-shaped in both the horizontal and vertical directions, and has the following characteristics: it includes a first flanging unit, which includes a first flanging driving member and a first flanging block, correspondingly arranged on the outer side of the transition edge, horizontally arranged, in an inverted L shape, matching the shape of the transition edge, and having a first upper surface that is S-shaped in the vertical direction; a first positioning and pressing unit, which includes a first pressing driving member and a first pressing block, rotatably connected to the first flanging block; a first control unit, which controls the first pressing driving member to drive the first pressing block to rotate forward by a predetermined angle, so that the pressing lower surface presses the skin on the first upper surface in a predetermined state, and the predetermined state is a state in which both the first pressing block and the first flanging block can drive the skin to move and can also slide relative to the skin.

Description

Technical Field

[0001] The present invention relates to the field of machinery, and particularly to a hemming mechanism for hand-like grasping and a hemming method thereof. Background Art

[0002] During the processing of automotive armrest semi-finished products, hot melt adhesive needs to be first sprayed on the inner surface of the cut skin to form a hot melt adhesive layer, and then the skin with the hot melt adhesive layer is pasted on the outer surface of the automotive armrest skeleton, and the skin located at the edge of the automotive armrest skeleton is turned over and wrapped and pasted on the inner surface of the automotive armrest skeleton.

[0003] Currently, the spraying process in the processing of automotive semi-finished products is usually completed manually, and the processes of pasting the skin, decorative fabric, etc. and hemming are completed manually or by automated hemming equipment. CN108582808A discloses a door panel hemming device with a pulling member, which is used for pasting decorative fabric and hemming the door panel skeleton. The fabric fixing structure used during fabric pasting is fixed by pulling the pulling member and evacuating, and the space occupied by the pulling member is relatively large, which is not conducive to the overall layout of the equipment, and the control process of the pulling member is also relatively complex.

[0004] In addition, the structure of the automotive armrest is very different from that of the automotive door panel, and the hemming requirements are also different. Figure 8 FIG. X is a schematic structural diagram of the automotive armrest skeleton in the present invention. As shown in the figure, the automotive armrest skeleton 1 includes a transition edge 2 and a non-transition edge 3. Figure 9 is Figure 8 an enlarged schematic view of the transition edge in FIG., as Figure 9 shown, the transition edge 2 gradually becomes narrower in the horizontal direction and gradually decreases in height in the vertical direction, that is, it is S-shaped in both the horizontal and vertical directions. The special structure of this transition edge 2 increases the hemming difficulty of this part, and the existing hemming structures cannot hem it.

[0005] In addition, the skin used for the above-mentioned automotive armrest processing is a PVC skin, which includes a first skin area and a second skin area connected together. For aesthetics, three stitches extending along the length direction are provided on the first skin area, and a plurality of positioning holes are pre-cut on the entire edge of the entire skin. The positioning holes penetrate the skin, and the plurality of positioning holes are evenly distributed along the edge of the skin. In the prior art, there is no special fixing device to position such a skin.

[0006] In summary, there is an urgent need to provide an automated device for spraying glue, fixing, and hemming the skin of automotive armrests. Summary of the Invention

[0007] The present invention is made to solve the above-mentioned problem of hemming the transition edge of the automotive armrest skeleton, and aims to provide a hemming mechanism imitating hand-shaped grasping and a hemming method thereof.

[0008] The present invention provides a hemming mechanism imitating hand-shaped grasping, which is used to turn the skin adhered to the transition edge of the automotive armrest skeleton from the outer surface of the automotive armrest skeleton to the inner surface. The transition edge is in an S shape both in the horizontal direction and the vertical direction, and has the following characteristics, including: a first flanging unit, a first positioning and pressing unit, and a first control unit. The first flanging unit includes: a first flanging block, which is correspondingly arranged on the outer side of the transition edge, horizontally arranged, in an inverted L shape, matching the shape of the transition edge, having a first upper surface and a first lower surface that are in an S shape in the vertical direction, and a first side surface that is in an S shape in the horizontal direction; and a first flanging driving member, which is used to drive the first flanging block to perform a forward or backward movement. The first positioning and pressing unit includes: a first pressing block, which is rotatably connected to the first flanging block, in an inverted L shape, having a pressing lower surface that matches the shape and size of the first upper surface; and a first pressing driving member, which is used to drive the first pressing block to rotate forward or backward by a predetermined angle. The first control unit controls the first pressing driving member to drive the first pressing block to rotate forward by a predetermined angle, so that the pressing lower surface presses the skin on the first upper surface in a predetermined state. The predetermined state is a state in which both the first pressing block and the first flanging block can drive the skin to move and can slide relative to the skin; the first control unit also controls the first flanging driving member to drive the first flanging block to perform a forward movement at a second predetermined speed, so that the skin is turned from the outer surface of the automotive armrest skeleton to the inner surface.

[0009] In the hemming mechanism imitating hand-shaped grasping provided by the present invention, it may also have the following characteristics: wherein, the first flanging driving member is also used to drive the first flanging block to perform a downward or upward movement. The first control unit also controls the first flanging driving member to drive the first flanging block to perform an upward movement at a first predetermined speed, so that the first lower surface is higher than the upper surface of the transition edge by a predetermined height. The first control unit also controls the first flanging driving member to drive the first flanging block to perform a downward movement at a third predetermined speed, so that the skin covers the inner surface of the automotive armrest skeleton.

[0010] In the hemming mechanism imitating hand-shaped grasping provided by the present invention, it may also have the following characteristics: wherein, the first predetermined speed, the second predetermined speed, and the third predetermined speed are equal.

[0011] In the hemming mechanism imitating hand-shaped grasping provided by the present invention, it may also have the following characteristics: wherein, the predetermined height is less than or equal to the thickness of the skin.

[0012] In the hemming mechanism for hand-like grasping provided by the present invention, it may further have the following feature: among them, the first upper surface, the first lower surface, the first side surface, and the pressing lower surface are all smooth surfaces.

[0013] In the hemming mechanism for hand-like grasping provided by the present invention, it may further have the following feature: among them, the first pressing block and the first flanging block are rotatably connected through a rotating shaft.

[0014] In the hemming mechanism for hand-like grasping provided by the present invention, it may further have the following feature: among them, the first pressing drive member and the first flanging drive member are both cylinder drive members.

[0015] The present invention provides a hemming method. Using the above-mentioned hemming mechanism for hand-like grasping, the skin adhered to the transition edge of the automotive armrest skeleton is flipped from the outer surface of the automotive armrest skeleton to the inner surface. The transition edge is in an S shape both in the horizontal direction and the vertical direction, and has the following features, including the following steps: Step S1, the first control unit controls the first pressing drive member to drive the first pressing block to rotate forward by a predetermined angle, so that the pressing lower surface presses the skin on the first upper surface in a predetermined state; Step S2, the first control unit controls the first flanging drive member to drive the first flanging block to perform a rising action from the initial position at a first predetermined speed and reach the first flanging position. When the first flanging block is at the first flanging position, the first lower surface is higher than the upper surface of the transition edge by a predetermined height; Step S3, the first control unit controls the first flanging drive member to drive the first flanging block to perform a forward movement from the first flanging position at a second predetermined speed and reach the second flanging position, so that the skin is flipped from the outer surface of the automotive armrest skeleton to the inner surface; Step S4, the first control unit controls the first flanging drive member to drive the first flanging block to perform a downward movement from the second flanging position at a third predetermined speed, so that the skin covers the inner surface of the automotive armrest skeleton. Among them, in Steps S2 - S4, the first control unit also controls the first pressing block to remain in the state where the skin is pressed on the first upper surface in a predetermined state.

[0016] Functions and effects of the invention

[0017] According to the hemming mechanism for hand-like grasping involved in the present invention, since it includes a flanging unit, a positioning and pressing unit, and a first control unit, the flanging unit includes a pressing block and a pressing driving member, the positioning and pressing unit includes a pressing block and a pressing driving member, and the first control unit can control the pressing driving member to drive the pressing block to rotate forward by a predetermined angle, so that the pressing lower surface presses the skin on the first upper surface in a predetermined state. The predetermined state is a state where both the pressing block and the flanging block can drive the skin to move and slide relative to the skin. In this way, when the flanging block advances at a second predetermined speed under the control of the first control unit, causing the skin to flip from the outer surface of the automotive armrest skeleton to the inner surface, it can imitate the state of hemming while pulling the skin tight and slowly sliding it out during manual hemming, preventing the appearance of skin wrinkles and achieving high-quality hemming of the transition edge of the skeleton. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the structural block diagram of the automotive armrest spray adhesive hemming system in the embodiment of the present invention;

[0019] Figure 2 is the three-dimensional structural schematic diagram of the automotive armrest composite hemming equipment in the embodiment of the present invention Figure 1 ;

[0020] Figure 3 is the three-dimensional structural schematic diagram of the automotive armrest composite hemming equipment in the embodiment of the present invention Figure 2 ;

[0021] Figure 4 is the structural schematic diagram of the skin fixing device in the embodiment of the present invention;

[0022] Figure 5 is the structural schematic diagram of the pneumatic positioning unit in the embodiment of the present invention;

[0023] Figure 6 is the structural schematic diagram of the hemming device in the embodiment of the present invention;

[0024] Figure 7 is the structural schematic diagram of the hemming mechanism for hand-like grasping in the embodiment of the present invention;

[0025] Figure 8 is the structural schematic diagram of the automotive armrest skeleton in the present invention;

[0026] Figure 9 is Figure 8 the enlarged schematic diagram of the transition edge in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the following embodiments will specifically elaborate on the hemming mechanism for hand-like grasping and its hemming method of the present invention in conjunction with the accompanying drawings.

[0028] Figure 1 It is a structural block diagram of the automotive armrest spray - glue edge - wrapping system in the embodiment of the present invention.

[0029] As shown in the figure, the present embodiment provides an automotive armrest spray - glue edge - wrapping system 1000, which includes a spray - glue device 100, an automotive armrest composite edge - wrapping device 200, and a control device 300. The control device 300 is used to control the operation of the spray - glue device 100 and the automotive armrest composite edge - wrapping device 200, so that the skin processed by the spray - glue device 100 is transferred to the automotive armrest composite edge - wrapping device 200 for processing at a constant interval time. This transfer can be manual handling or automatic handling by equipment.

[0030] The spray - glue device 100 is used to spray hot - melt glue on the inner surface of the cut - to - size skin mentioned in the background technology, and has a spray - glue control device 110. This spray - glue device 100 is prior art. For example, the automotive interior door panel spray - glue device in the previously published Chinese patent application CN110947561A applied by the applicant can be used, and on this basis, the bracket for fixing the automotive interior door panel in its placement part is changed to a structure for fixing the skin. In addition, the spray - glue control device 110 is communicatively connected to the control device 300 and operates under the control of the control device 300.

[0031] Figure 2 It is a three - dimensional structure schematic of the automotive armrest composite edge - wrapping device in the embodiment of the present invention Figure 1 ; Figure 3 It is a three - dimensional structure schematic of the automotive armrest composite edge - wrapping device in the embodiment of the present invention Figure 2 .

[0032] The automotive armrest composite edge - wrapping device 200 is used to paste the skin with hot - melt glue (layer) on the inner surface processed by the spray - glue device 100 onto the automotive armrest skeleton 1 and perform edge - wrapping on the automotive armrest skeleton 1. As Figures 1 - 3 shown, the automotive armrest composite edge - wrapping device 200 includes a support mechanism 210, a skin fixing device 220, a skeleton fixing device 230, a baking device 240, an edge - wrapping device 250, and an edge - wrapping control device 260.

[0033] The edge - wrapping control device 260 is communicatively connected to the control device 300 and includes a first control part 261 and a second control part 262. The first control part 261 is used to control the operation of the skin fixing device 220, the skeleton fixing device 230, and the baking device 240 under the control of the control device 300. The second control part 262 is used to control the operation of the edge - wrapping device under the control of the control device 300.

[0034] As Figure 2 , 3As shown, the support mechanism 210 includes a lower support portion 211 and an upper support portion 212 that are connected together.

[0035] Figure 4 It is a schematic structural diagram of the epidermis fixing device in an embodiment of the present invention.

[0036] As Figure 4 shown, the epidermis fixing device 220 is used to fix and position the epidermis, and includes a fixing frame (not shown in the figure), a profiling mold 221, a pneumatic positioning unit 222, and a vacuum generator 223 (not shown in the figure). The fixing frame is installed on the lower support portion 211.

[0037] The profiling mold 221 is fixedly arranged on the fixing frame and has a shape matching the shape of the automotive armrest skeleton 1, and is used to fix the epidermis during the processing to prevent the epidermis from moving during the processing and facilitate the smooth progress of the processing. The profiling mold 221 includes a first mold area 2211, a second mold area 2212, and a long side area 2213. A plurality of through-hole groups 2214 are provided on the first mold area 2211 and the second mold area 2212, and each through-hole group 2214 includes 4 - 8 through-holes 22141 arranged in a straight line.

[0038] Among them, the first mold area 2211 corresponds to the first epidermis area of the epidermis, and the plurality of through-holes 22141 in the through-hole group 2214 provided on the first mold area 2211 are linearly distributed along the length direction of the profiling mold 221, and the plurality of through-hole groups 2214 are distributed in rows and columns. No through-holes 22141 are provided in the part of the first mold area 2211 corresponding to the suture of the epidermis. The second mold area 2212 corresponds to the second epidermis area of the epidermis, and the plurality of through-holes 22141 in the through-hole group 2214 provided on the second mold area 2212 are linearly distributed along the length direction of the profiling mold 221, and the plurality of through-hole groups 2214 are distributed in rows. A plurality of through-holes 2215 are provided on the long side area 2213 and are uniformly distributed along its length direction.

[0039] The vacuum generator is fixedly arranged on the fixing frame and is a vacuum pump. The vacuum pump is respectively connected to the through-holes 22141 through vacuum pipelines (not shown in the figure). When the vacuum pump evacuates the air in the vacuum pipelines and the through-holes 22141, the through-holes 22141 suck the epidermis tightly onto the profiling mold 221.

[0040] Figure 5 It is a schematic structural diagram of the pneumatic positioning unit in an embodiment of the present invention.

[0041] As Figure 5As shown in the figure, the pneumatic positioning unit 222 is fixedly arranged on the fixing frame and has a positioning pin 2221 and a positioning pin driving cylinder 2222. The positioning pin 2221 matches the positioning holes on the skin and is used to pass through the positioning holes so that the skin is positioned on the profiling die 221. The positioning pin driving cylinder 2222 is used to drive the positioning pin 2221 to move down or up. After the positioning pin driving cylinder 2222 drives the positioning pin 2221 to rise, the positioning pin 2221 is in the positioning station. At this time, by placing the skin on the positioning pin, the skin can be positioned on the profiling die 221, so that the first skin area corresponds to the first die area 2211 and the second skin area corresponds to the second die area 2212. After the positioning pin driving cylinder 2222 drives the positioning pin 2221 to move down, it is convenient for the edge wrapping device 250 to perform edge wrapping from above the positioning pin 2221.

[0042] The number of pneumatic positioning units 222 is the same as the number of positioning holes on the skin. A plurality of pneumatic positioning units 222 are arranged around the periphery of the profiling die 221, and their distribution corresponds to the distribution of the positioning holes.

[0043] Among them, the pneumatic positioning unit 222 corresponding to the long side area 2213 is arranged below the through hole 2215 of the long side area 2213. After the positioning pin driving cylinder 2222 drives these positioning pins 2221 to rise, the positioning pins 2221 pass through and out of the through hole 2215, so as to reach their positioning stations. The part of the positioning pin 2221 passing through the through hole 2215 is used to position the skin. After the positioning pin driving cylinder 2222 drives the positioning pin 2221 to move down, the top of the positioning pin 2221 is lower than the top of the through hole 2215.

[0044] As Figure 2 shown in the figure, the skeleton fixing device 230 is installed on the upper support part 212 and is used to fix the automotive armrest skeleton 1. It includes a skeleton fixing unit (not shown in the figure) and a vertical driving unit (not shown in the figure). The skeleton fixing unit is installed on the vertical driving unit and is located directly above the profiling die 221. It is used to fix the automotive armrest skeleton 1 and move up and down under the drive of the vertical driving unit. The skeleton fixing unit is a prior art, such as a structure using a positioning die and clamping jaws in cooperation. The vertical driving unit is a prior art, such as a slide rail type structure.

[0045] As Figure 3As shown, the baking device 240 is installed on the lower support portion 211 and is used to heat the hot melt adhesive on the automotive armrest skeleton 1 and the skin. The baking device 240 includes a heating unit 241 and a horizontal driving unit (not shown in the figure). The heating unit 241 includes a heating rack (not shown in the figure), an upper heating tube (not shown in the figure), and a lower heating tube (not shown in the figure). The heating rack is installed on the horizontal driving unit. The upper heating tube is installed on the heating rack and is used to heat the automotive armrest skeleton 1 under the control of the first control unit 261; the lower heating tube is installed on the heating rack and is used to melt the hot melt adhesive layer of the skin under the control of the first control unit 261. The horizontal driving unit is used to drive the heating rack of the heating unit 241 to move horizontally. When the heating rack is driven by the horizontal driving unit and moves horizontally from the heating initial position to the heating position, the upper heating tube is located below the skeleton fixing unit and corresponds to the skeleton fixing unit, and the lower heating tube is located above the profiling mold 221 and corresponds to the profiling mold 221. The horizontal driving unit is a prior art, such as a slide rail type structure.

[0046] Figure 6 It is a schematic structural diagram of the edge wrapping device in the embodiment of the present invention.

[0047] As Figure 6 shown, the edge wrapping device 250 is used to turn the skin adhered to the automotive armrest skeleton 1 from the outer surface of the automotive armrest skeleton 1 to the inner surface, and includes an edge wrapping mechanism 251 that imitates hand-like grasping and a non-transition edge wrapping mechanism 252. The edge wrapping mechanism 251 that imitates hand-like grasping and the non-transition edge wrapping mechanism 252 are both arranged outside the profiling mold 221.

[0048] Figure 7 It is a schematic structural diagram of the edge wrapping mechanism that imitates hand-like grasping in the embodiment of the present invention.

[0049] As Figure 7 shown, the edge wrapping mechanism 251 that imitates hand-like grasping is used to wrap the transition edge 2 of the automotive armrest skeleton 1. Therefore, this mechanism is also called the transition edge wrapping mechanism. The number of the transition edge wrapping mechanisms 251 is at least two and are respectively arranged at positions corresponding to the transition edge 2. Each transition edge wrapping mechanism 251 includes a first flanging unit 2511, a first positioning and pressing unit 2512, and a first control unit (not shown in the figure),

[0050] The first flanging unit 2511 includes a first flanging block 25111 and a first flanging driving member 25112. The first flanging block 25111 is correspondingly arranged outside the transition edge 2, horizontally arranged, in an inverted L shape, matching the shape of the transition edge, and having a first upper surface 251111 and a first lower surface 251112 that are S-shaped in the vertical direction, and a first side surface 251113 that is S-shaped in the horizontal direction. The first flanging driving member 25112 is used to drive the first flanging block 25111 to perform forward or backward or downward or upward movements. The first flanging driving member 25112 is a cylinder driving member. The cylinder driving member includes, for example, two cylinders, and these two cylinders respectively drive the first flanging block 25111 to move in the horizontal direction and the vertical direction.

[0051] The first positioning and pressing unit 2512 includes a first pressing block 25121 and a first pressing driving member 25122. The first pressing block 25121 is rotatably connected to the first flanging block 25111 through a rotating shaft. Therefore, the first pressing block 25121 can both rotate relative to the first flanging block 25111 and perform forward or backward or downward or upward movements together with the first flanging block 25111. The first pressing block 25121 is in an inverted L shape and has a pressing lower surface 251211 that matches the shape and size of the first upper surface 251111. The first pressing driving member 25122 is used to drive the first pressing block to rotate forward or backward by a predetermined angle. The first pressing driving member 25122 is a cylinder driving member.

[0052] The first upper surface 251111, the first lower surface 251112, the first side surface 251113, and the pressing lower surface 251211 are all smooth surfaces.

[0053] The first control unit is communicatively connected to the second control part 262 and is used to control the first pressing driving member 25122 to drive the first pressing block 25121 to rotate forward or backward by a predetermined angle under the control of the second control part 262. When the first pressing block 25121 rotates forward by a predetermined angle, the pressing lower surface 251211 presses the skin on the first upper surface 251111 in a predetermined state. The predetermined state is a state in which both the first pressing block 25121 and the first flanging block 25111 can drive the skin to move and can slide relative to the skin.

[0054] The first control unit is further configured to control the first flanging driving member 25112 to drive the first flanging block 25111 to perform forward or backward or upward or downward movement under the control of the second control unit 262. When the first flanging block 25111 performs a forward movement, the first flanging block 25111 flips the skin from the outer surface of the vehicle armrest skeleton 1 to the inner surface; when the first flanging block 25111 performs a downward movement, the first flanging block 25111 causes the skin to cover the inner surface of the vehicle armrest skeleton 1.

[0055] As Figure 6 shown, the non-transition edge hemming mechanism 252 is used to hem the non-transition edge 3 of the vehicle armrest skeleton 1. The number of non-transition edge hemming mechanisms 252 is multiple, and they are respectively arranged at positions corresponding to the non-transition edge 3. Each non-transition edge hemming mechanism 252 includes a second flanging unit 2521 and a first control unit (not shown in the figure).

[0056] The second flanging unit 2521 includes a second flanging block 25211 and a second flanging driving member 25212. The second flanging block 25211 matches the shape of the non-transition edge and is in an inverted L shape. The second flanging driving member 25212 is configured to drive the second flanging block 25211 to perform forward or backward or upward or downward movement. The second flanging driving member 25212 is a cylinder driving member.

[0057] The second control unit is communicatively connected to the second control unit 262, and is configured to control the second flanging driving member 25212 to drive the second flanging block 25211 to perform forward or backward or upward or downward movement under the control of the second control unit 262. When the second flanging block 25211 performs a forward movement, the second flanging block 25211 flips the skin from the outer surface of the vehicle armrest skeleton 1 to the inner surface; when the second flanging block 25211 performs a downward movement, the second flanging block 25211 causes the skin to cover the inner surface of the vehicle armrest skeleton 1.

[0058] Under the control of the control device 300, the first control unit 261 controls the operation of the skin fixing device 220, the skeleton fixing device 230, and the baking device 240. The process of pasting the skin with a hot melt adhesive (layer) on the inner surface to the vehicle armrest skeleton 1 includes the following steps:

[0059] Step S1-1, the first control unit 261 controls the positioning pin driving cylinder 2222 to drive the positioning pin 2221 to rise from its initial position to the positioning position, and then enters step S1-2.

[0060] Step S1-2: Align the positioning holes on the skin with the positioning pins 2221, and place the skin with its back facing up on the profiling mold 221 and the positioning pins 2221. Also, fix the automotive armrest skeleton 1 with its surface to be pasted with the skin (outer surface) facing down on the skeleton fixing unit. Then proceed to step S1-3.

[0061] Step S1-3: The first control unit 261 controls the vacuum generator to evacuate the air, adsorbing the decorative fabric on the profiling mold 221. Then proceed to step S1-4.

[0062] Step S1-4: The first control unit 261 controls the vertical drive unit to drive the skeleton fixing unit to move down from its initial position to the position to be heated, and at the same time controls the horizontal drive unit to drive the heating unit 241 to move horizontally from the initial heating position to the heating position. Then proceed to step S1-5.

[0063] Step S1-5: The first control unit 261 controls the upper heating tube to heat the automotive armrest skeleton 1, and at the same time controls the lower heating tube to heat the hot melt adhesive layer of the skin fixed on the profiling mold 221. Then proceed to step S1-6.

[0064] Step S1-6: The first control unit 261 controls the horizontal drive unit to drive the heating unit 241 to retract to the initial heating position, and controls the upper heating tube and the lower heating tube to stop heating. Then proceed to step S1-7.

[0065] Step S1-7: The first control unit 261 controls the vertical drive unit to drive the skeleton fixing unit to move down from the position to be heated to the pasting position, pressing the automotive armrest skeleton 1 against the skin. Then proceed to step S1-8.

[0066] Step S1-8: The first control unit 261 controls the positioning pin drive cylinder 2222 to drive the positioning pins 2221 to return from their positioning positions to their initial positions. At this time, the edge wrapping device 250 operates to flip and press the skin at the edge of the automotive armrest skeleton 1 to the inner surface of the automotive armrest skeleton 1. Then proceed to step S1-9.

[0067] Step S1-9: The first control unit 261 controls the vacuum generator to stop evacuating the air, and then proceed to step S1-10.

[0068] Step S1-10: The first control unit 261 controls the vertical drive unit to drive the skeleton fixing unit to rise back to its initial position from the pasting position, and then proceed to step S1-11.

[0069] Step S1-11: Remove the automotive armrest skeleton 1 that has completed pasting and edge wrapping (processing completed) from the skeleton fixing unit, thus completing one round of pasting and edge wrapping processing.

[0070] Under the control of the control device 300, the process by which the second control unit 262 controls the transition edge hemming mechanism 251 to hem the transition edge 2 of the vehicle armrest skeleton 1 through the first control unit includes the following steps:

[0071] Step S2-1, the first control unit controls the first pressing drive member 25122 to drive the first pressing block 25121 to rotate forward by a predetermined angle, so that the pressing lower surface 251211 presses the skin against the first upper surface 251111 in a predetermined state, and then proceeds to step S2-2. This predetermined state is a state in which both the first pressing block 25121 and the first flanging block 25111 can drive the skin to move and can slide relative to the skin.

[0072] Step S2-2, the first control unit controls the first flanging drive member 25122 to drive the first flanging block 25111 to perform a rising action from the initial position at a first predetermined speed, reach the first flanging position, and then proceed to step S2-3. When the first flanging block 25111 is at the first flanging position, the first lower surface 251112 is higher than the upper surface of the transition edge 2 by a predetermined height, and this predetermined height is less than or equal to the thickness of the skin.

[0073] Step S2-3, the first control unit controls the first flanging drive member 25122 to drive the first flanging block 25111 to perform a forward movement from the first flanging position at a second predetermined speed, reach the second flanging position, so that the skin is flipped from the outer surface of the vehicle armrest skeleton 1 to the inner surface, and then proceeds to step S2-4.

[0074] Step S2-4, the first control unit controls the first flanging drive member 25122 to drive the first flanging block 25111 to perform a downward movement from the second flanging position at a third predetermined speed, so that the skin covers the inner surface of the vehicle armrest skeleton, and then proceeds to step S2-5.

[0075] Among them, in steps S2-S4, the first control unit also controls the first pressing block 25121 to remain in a state where the skin is pressed against the first upper surface 251111 in a predetermined state. The first predetermined speed, the second predetermined speed, and the third predetermined speed are equal.

[0076] Step S2-5, the first control unit controls the first flanging drive member 25122 to drive the first flanging block 25111 to return to the initial position through rising, retracting, and downward movement in sequence. The return speed of the first flanging block 25111 is greater than or equal to the first predetermined speed, preferably greater than the first predetermined speed.

[0077] Under the control of the control device 300, the process by which the second control unit 262 controls the non-transition edge hemming mechanism 252 to hem the non-transition edge 3 of the vehicle armrest skeleton 1 through the second control unit includes the following steps:

[0078] Step S3-1, the second control unit controls the second flanging driving member 25212 to drive the second flanging block 25211 to perform a forward movement from its initial position, so that the skin is flipped from the outer surface of the vehicle armrest skeleton 1 to the inner surface, and then proceeds to Step S3-2.

[0079] Step S3-2, the second control unit controls the second flanging driving member 25212 to drive the second flanging block 25211 to perform a downward movement, so that the skin covers the inner surface of the vehicle armrest skeleton, and then proceeds to Step S3-3.

[0080] Step S3-3, the second control unit controls the second flanging driving member 25212 to drive the second flanging block 25211 to return to its initial position through ascending and retracting movements in sequence.

[0081] Functions and effects of the embodiment

[0082] According to the hemming mechanism for hand-like grasping involved in this embodiment, since it includes a flanging unit, a positioning and pressing unit, and a first control unit, the flanging unit includes a pressing block and a pressing driving member, the positioning and pressing unit includes a pressing block and a pressing driving member, and the first control unit can control the pressing driving member to drive the pressing block to rotate forward by a predetermined angle, so that the lower pressing surface presses the skin against the first upper surface in a predetermined state. The predetermined state is a state in which both the pressing block and the flanging block can drive the skin to move and can slide relative to the skin. In this way, when the flanging block performs a forward movement at a second predetermined speed under the control of the first control unit, so that the skin is flipped from the outer surface of the vehicle armrest skeleton to the inner surface, it can imitate the state of hemming while pulling the skin tightly and slowly sliding out during manual hemming, preventing the appearance of skin wrinkles and achieving high-quality hemming of the transition edge of the skeleton.

[0083] Similarly, when the flanging block performs an ascending movement at a first predetermined speed and a downward movement at a third predetermined speed under the control of the first control unit, the skin is also in a state of being tight and slowly sliding out.

[0084] Furthermore, the first control unit also controls the flanging driving member to drive the flanging block to perform an ascending movement at a first predetermined speed, so that the first lower surface is higher than the upper surface of the transition edge by a predetermined height, and the predetermined height is less than or equal to the thickness of the skin, which is convenient for the flanging block to press the skin against the vehicle armrest skeleton when flipping the skin from the outer surface of the vehicle armrest skeleton to the inner surface, thereby achieving a better pasting and hemming effect.

[0085] Furthermore, the first predetermined speed, the second predetermined speed, and the third predetermined speed are equal and less than the return speed of the flanging block, which not only ensures the uniform consistency during flanging and achieves a good flanging effect, but also further shortens the retraction time and improves the processing efficiency.

[0086] Furthermore, the pressing block and the flanging block are rotatably connected by a rotating shaft, with a simple structure and facilitating the control of the flanging block to rotate by a predetermined angle.

[0087] The above embodiments are preferred cases of the present invention and are not used to limit the protection scope of the present invention.

Claims

1. A hemming mechanism imitating hand-like grasping, which is used to turn the skin adhered to the transition edge of the automotive armrest skeleton from the outer surface of the automotive armrest skeleton to the inner surface. The transition edge is S-shaped both in the horizontal direction and the vertical direction. The transition edge becomes narrower from wide in the horizontal direction and gradually decreases in height in the vertical direction. Characterized in that, Comprising: A first flanging unit, a first positioning and pressing unit, and a first control unit. The first flanging unit includes: A first flanging block, which is correspondingly arranged outside the transition edge, horizontally arranged, in an inverted L shape, matching the shape of the transition edge, having a first upper surface and a first lower surface that are S-shaped in the vertical direction, and a first side surface that is S-shaped in the horizontal direction; and A first flanging driving member, which is used to drive the first flanging block to perform forward or backward movement or downward or upward movement, including two driving cylinders, and these two driving cylinders respectively drive the first flanging block to move in the horizontal direction and the vertical direction. The first positioning and pressing unit includes: A first pressing block, which is rotatably connected to the first flanging block, in an inverted L shape, having a pressing lower surface that matches the shape and size of the first upper surface; and A first pressing driving member, which is used to drive the first pressing block to rotate forward or backward by a predetermined angle. The first control unit controls the first pressing driving member to drive the first pressing block to rotate forward by the predetermined angle, so that the pressing lower surface presses the skin on the first upper surface in a predetermined state. The predetermined state is a state in which both the first pressing block and the first flanging block can drive the skin to move and can slide relative to the skin. The first control unit also controls the first flanging driving member to drive the first flanging block to perform a forward movement at a second predetermined speed, so that the skin is turned from the outer surface of the automotive armrest skeleton to the inner surface.

2. The hemming mechanism imitating hand-like grasping according to claim 1, characterized in that: Wherein, The first control unit also controls the first flanging driving member to drive the first flanging block to perform an upward movement at a first predetermined speed, so that the first lower surface is higher than the upper surface of the transition edge by a predetermined height. The first control unit also controls the first flanging driving member to drive the first flanging block to perform a downward movement at a third predetermined speed, so that the skin covers the inner surface of the automotive armrest skeleton.

3. The hemming mechanism imitating hand-like grasping according to claim 2, characterized in that: Wherein, The first predetermined speed, the second predetermined speed, and the third predetermined speed are equal.

4. The hemming mechanism imitating hand-like grasping according to claim 2, characterized in that: Wherein, The predetermined height is less than or equal to the thickness of the skin.

5. The hemming mechanism imitating hand-like grasping according to claim 1, characterized in that: Wherein, The first upper surface, the first lower surface, the first side surface, and the pressing lower surface are all smooth surfaces.

6. The hemming mechanism imitating hand-like grasping according to claim 1, characterized in that: Wherein, The first pressing block and the first flanging block are rotatably connected by a rotating shaft.

7. The hemming mechanism for hand-like grasping according to claim 1, characterized in that: Wherein, The first pressing drive member and the first flanging drive member are both cylinder drive members.

8. A hemming method for using the hemming mechanism for hand-like grasping according to any one of claims 1-7 to turn the skin adhered to the transition edge of the automotive armrest skeleton from the outer surface of the automotive armrest skeleton to the inner surface, wherein the transition edge is S-shaped in both the horizontal and vertical directions. It is characterized in that It includes the following steps: Step S1, the first control unit controls the first pressing drive member to drive the first pressing block to rotate forward by the predetermined angle, so that the pressing lower surface presses the skin on the first upper surface in the predetermined state. Step S2, the first control unit controls the first flanging drive member to drive the first flanging block to perform a rising action from the initial position at the first predetermined speed to reach the first flanging position. When the first flanging block is at the first flanging position, the first lower surface is higher than the upper surface of the transition edge by a predetermined height. Step S3, the first control unit controls the first flanging drive member to drive the first flanging block to perform a forward movement from the first flanging position at the second predetermined speed to reach the second flanging position, so that the skin is turned from the outer surface of the automotive armrest skeleton to the inner surface. Step S4, the first control unit controls the first flanging drive member to drive the first flanging block to perform a downward movement from the second flanging position at the third predetermined speed, so that the skin covers the inner surface of the automotive armrest skeleton. Wherein, in steps S2-S4, the first control unit also controls the first pressing block to remain in the state where the skin is pressed on the first upper surface in the predetermined state.

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