Automobile armrest skin fixing device

Abstract

The present invention provides a fixing device for an automotive armrest skin, which is used to fix the skin with positioning holes pre-cut at the edges, and has the following characteristics: including a fixing frame; a profiling die, fixedly arranged on the fixing frame, having a shape matching the shape of the automotive armrest skeleton, for positioning the skin, and a plurality of through holes are arranged on the profiling die; a pneumatic positioning unit, fixedly arranged on the fixing frame, having positioning pins matching the positioning holes, and the positioning pins are used to pass through the positioning holes so that the skin is positioned on the profiling die; a vacuum generator, fixedly arranged on the fixing frame, respectively communicated with the plurality of through holes, and used to evacuate the through holes to adsorb and tightly hold the skin on the profiling die.

Description

Technical Field

[0001] The present invention relates to the field of machinery, and particularly to a fixing device for an automobile armrest skin. Background Art

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

[0003] Currently, the glue spraying process in the processing of automobile semi-finished products is usually completed manually, and the processes of pasting the skin, decorative fabric, etc. and edging are completed manually or by automated edging equipment. CN108582808A discloses a door panel edging device with a pulling member, which is used for pasting decorative fabric and edging processing on a door panel skeleton. The fabric fixing structure used when pasting the fabric is fixed by the pulling of the pulling member and vacuum pumping, and the space occupied by the setting of 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 automobile armrest is very different from that of the automobile door panel structure, and the edging requirements are also different. Figure 8 is a schematic structural diagram of the automobile armrest skeleton in the present invention. As Figure 8 shown, the automobile armrest skeleton 1 includes a transition edge 2 and a non-transition edge 3. Figure 9 is Figure 8 an enlarged schematic diagram of the transition edge in Figure 9 shown. As shown, the transition edge 2 becomes narrower from wide 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 difficulty of edging this part, and the existing edging structures cannot edge it.

[0005] In addition, the skin used for the above-mentioned automobile 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 edging the skin of an automobile armrest. Summary of the Invention

[0007] The present invention is made to solve the problem of fixing the skin when fixing and edging the automotive armrest, and aims to provide an automotive armrest skin fixing device.

[0008] The present invention provides an automotive armrest skin fixing device for fixing a skin with positioning holes pre-cut at the edges, having the following features: a fixing frame; a profiling die, fixedly arranged on the fixing frame, having a shape matching the shape of the automotive armrest skeleton for positioning the skin, and a plurality of through holes are arranged on the profiling die; a pneumatic positioning unit, fixedly arranged on the fixing frame, having positioning pins matching the positioning holes, and the positioning pins are used to pass through the positioning holes so that the skin is positioned on the profiling die; a vacuum generator, fixedly arranged on the fixing frame, respectively communicating with the plurality of through holes, and used to evacuate the through holes to adsorb and tightly hold the skin on the profiling die.

[0009] In the automotive armrest skin fixing device provided by the present invention, it may also have the following feature: wherein, the plurality of through holes are arranged in through hole groups, and the number of through holes in each through hole group is 4 - 8.

[0010] In the automotive armrest skin fixing device provided by the present invention, it may also have the following feature: wherein, the skin includes a first skin area, and a stitch extending along the length direction is arranged on the first skin area.

[0011] The profiling die includes a first die area corresponding to the first skin area.

[0012] The plurality of through holes in the through hole group arranged on the first die area are linearly distributed along the length direction of the profiling die, and the plurality of through hole groups are arranged in rows or columns.

[0013] In the automotive armrest skin fixing device provided by the present invention, it may also have the following feature: wherein, no through hole is arranged on the part of the first die area corresponding to the stitch.

[0014] In the automotive armrest skin fixing device provided by the present invention, it may also have the following feature: wherein, the skin further includes a second skin area, the profiling die further includes a second die area corresponding to the second skin area, the plurality of through holes in the through hole group arranged on the second die area are linearly distributed along the width direction of the profiling die, and the plurality of through hole groups are arranged in rows.

[0015] In the automotive armrest skin fixing device provided by the present invention, it may also have the following feature: wherein, the number of the positioning holes is multiple, the multiple positioning holes are evenly distributed along the edge of the skin, the number of the pneumatic positioning units is the same as the number of the positioning holes, and the pneumatic positioning units are arranged beside the profiling die.

[0016] In the automobile armrest skin fixing device provided by the present invention, it may further have the following characteristics: among them, the pneumatic positioning unit further has a cylinder, and the cylinder drives the positioning pin to move down or up.

[0017] In the automobile armrest skin fixing device provided by the present invention, it may further have the following characteristics: among them, the profiling die blank is further provided with through holes, and the positioning pins correspond to the through holes. After the cylinder drives the positioning pins to rise, the positioning pins pass through and out of the through holes, and the part of the positioning pins that passes through the through holes is used to position the skin. After the cylinder drives the positioning pins to move down, the top of the positioning pins is lower than the top of the through holes.

[0018] In the automobile armrest skin fixing device provided by the present invention, it may further have the following characteristics: among them, the skin is PVC.

[0019] Functions and effects of the invention

[0020] According to the automobile armrest skin fixing device involved in the present invention, because it includes a profiling die blank, a pneumatic positioning unit and a vacuum generator, the profiling die blank is provided with a plurality of through holes, and the pneumatic positioning unit has positioning pins that match the positioning holes on the skin. Through the cooperation of the positioning pins and the positioning holes, the skin can be initially positioned, so that the skin can be accurately placed on the positioning pins and the profiling die blank, and then the vacuum generator evacuates the through holes to adsorb and tightly hold the skin on the profiling die blank. Therefore, through this skin fixing device, rapid and accurate positioning of the skin can be achieved, and the device also has the advantages of simple structure and easy automation control. Description of the drawings

[0021] Figure 1 is the structural block diagram of the automobile armrest glue spraying and edge wrapping system in the embodiment of the present invention;

[0022] Figure 2 is the three-dimensional structure schematic diagram of the automobile armrest composite edge wrapping equipment in the embodiment of the present invention Figure 1 ;

[0023] Figure 3 is the three-dimensional structure schematic diagram of the automobile armrest composite edge wrapping equipment in the embodiment of the present invention Figure 2 ;

[0024] Figure 4 is the structural schematic diagram of the skin fixing device in the embodiment of the present invention;

[0025] Figure 5 is the structural schematic diagram of the pneumatic positioning unit in the embodiment of the present invention;

[0026] Figure 6 is the structural schematic diagram of the edge wrapping device in the embodiment of the present invention;

[0027] Figure 7 It is a schematic structural diagram of the edge - wrapping mechanism for hand - like grasping in the embodiments of the present invention;

[0028] Figure 8 It is a schematic structural diagram of the automotive armrest skeleton in the present invention;

[0029] Figure 9 is Figure 8 An enlarged schematic diagram of the transition edge in Specific embodiments

[0030] In order to make the technical means, creative features, achieved purposes and effects realized by the present invention easy to understand, the following embodiments will specifically elaborate on the automotive armrest skin fixing device of the present invention in conjunction with the accompanying drawings.

[0031] Figure 1 It is a structural block diagram of the automotive armrest spray - glue edge - wrapping system in the embodiments of the present invention.

[0032] 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.

[0033] The spray - glue device 100 is used to spray hot - melt adhesive 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 prior - published Chinese invention 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.

[0034] Figure 2 It is a three - dimensional structural schematic of the automotive armrest composite edge - wrapping device in the embodiments of the present invention Figure 1 ; Figure 3 It is a three - dimensional structural schematic of the automotive armrest composite edge - wrapping device in the embodiments of the present invention Figure 2 .

[0035] The automotive armrest composite edge - wrapping device 200 is used to paste the skin with hot - melt adhesive (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 - 3As shown in the figure, 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.

[0036] The edge wrapping control device 260 is communicatively connected to the control device 300 and includes a first control unit 261 and a second control unit 262. The first control unit 261 is configured 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 unit 262 is configured to control the operation of the edge wrapping device under the control of the control device 300.

[0037] As Figure 2 , 3 shown in the figure, the support mechanism 210 includes a lower support portion 211 and an upper support portion 212 that are connected together.

[0038] Figure 4 FIG. is a schematic structural diagram of the skin fixing device in an embodiment of the present invention.

[0039] As Figure 4 shown in the figure, the skin fixing device 220 is used to fix and position the skin, 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 mounted on the lower support portion 211.

[0040] 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 skin during the processing to prevent the skin 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.

[0041] Among them, the first mold area 2211 corresponds to the first skin area of the skin, 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. The part of the first mold area 2211 corresponding to the seam of the skin is not provided with through-holes 22141. The second mold area 2212 corresponds to the second skin area of the skin, 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 evenly distributed along its length direction.

[0042] The vacuum generator is fixedly arranged on the fixed frame and is a vacuum pump. The vacuum pump is respectively connected to the through hole 22141 through a vacuum pipeline (not shown in the figure). When the vacuum pump evacuates the air in the vacuum pipeline and the through hole 22141, the through hole 22141 sucks the skin tightly onto the profiling mold 221.

[0043] Figure 5 It is a schematic structural diagram of the pneumatic positioning unit in the embodiment of the present invention.

[0044] As Figure 5 shown, the pneumatic positioning unit 222 is fixedly arranged on the fixed frame and has a positioning pin 2221 and a positioning pin driving cylinder 2222. The positioning pin 2221 matches the positioning hole on the skin and is used to pass through the positioning hole so that the skin is positioned on the profiling mold 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 mold 221, so that the first skin area corresponds to the first mold area 2211, and the second skin area corresponds to the second mold 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.

[0045] The number of the pneumatic positioning units 222 is the same as the number of the positioning holes on the skin. A plurality of pneumatic positioning units 222 are arranged around the periphery of the profiling mold 221, and their distribution corresponds to the distribution of the positioning holes.

[0046] Among them, the pneumatic positioning units 222 corresponding to the long side area 2213 are 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.

[0047] As Figure 2As shown, the skeleton fixing device 230 is installed on the upper support portion 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 mold 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, for example, it adopts a structure in which a positioning mold and a clamping jaw cooperate. The vertical driving unit is a prior art, for example, it adopts a slide rail type structure.

[0048] As Figure 3 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 moves horizontally from the heating initial position to the heating position under the drive of the horizontal driving unit, 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, for example, it adopts a slide rail type structure.

[0049] Figure 6 It is a schematic structural diagram of the edge wrapping device in the embodiment of the present invention.

[0050] 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.

[0051] 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.

[0052] As Figure 7As shown, the hemming mechanism 251 that mimics hand-like grasping is used to hem the transition edge 2 of the automotive armrest skeleton 1. Therefore, this mechanism is also called the transition edge hemming mechanism. The number of the transition edge hemming mechanisms 251 is at least two, which are respectively arranged at positions corresponding to the transition edge 2. Each hemming mechanism 251 for the transition edge includes a first flanging unit 2511, a first positioning and pressing unit 2512, and a first control unit (not shown in the figure).

[0053] 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.

[0054] 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 not only rotate relative to the first flanging block 25111, but also move forward or backward or downward or upward 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.

[0055] 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.

[0056] 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. This predetermined state is a state in which the first pressing block 25121 and the first flanging block 25111 can both drive the skin to move and slide relative to the skin.

[0057] The first control unit is further configured to control, under the control of the second control unit 262, the first flanging drive member 25112 to drive the first flanging block 25111 to perform forward or backward or upward or downward movement. 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.

[0058] As Figure 6 As 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).

[0059] The second flanging unit 2521 includes a second flanging block 25211 and a second flanging drive 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 drive member 25212 is used to drive the second flanging block 25211 to perform forward or backward or upward or downward movement. The second flanging drive member 25212 is a cylinder drive member.

[0060] The second control unit is communicatively connected to the second control unit 262, and is configured to control, under the control of the second control unit 262, the second flanging drive member 25212 to drive the second flanging block 25211 to perform forward or backward or upward or downward movement. 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.

[0061] 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:

[0062] Step S1-1, the first control unit 261 controls the positioning pin drive cylinder 2222 to drive the positioning pin 2221 to rise from its initial position to the positioning position, and then proceeds to step S1-2.

[0063] Step S1-2: Align the positioning holes on the skin with the positioning pins 2221, and place the skin on the profiling mold 221 and the positioning pins 2221 with its back facing up. Also, fix the automotive armrest skeleton 1 on the skeleton fixing unit with the surface (outer surface) to which the skin is to be pasted facing down. Then proceed to step S1-3.

[0064] 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.

[0065] 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 station to the station 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.

[0066] 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.

[0067] 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.

[0068] Step S1-7: The first control unit 261 controls the vertical drive unit to drive the skeleton fixing unit to move down from the station to be heated to the pasting station, pressing the automotive armrest skeleton 1 against the skin. Then proceed to step S1-8.

[0069] Step S1-8: The first control unit 261 controls the positioning pin driving cylinder 2222 to drive the positioning pins 2221 to return from their positioning stations to their initial stations. 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.

[0070] Step S1-9: The first control unit 261 controls the vacuum generator to stop evacuating the air, and then proceed to step S1-10.

[0071] 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 station from the pasting station, and then proceed to step S1-11.

[0072] 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.

[0073] Under the control of the control device 300, the process of the second control unit 262 controlling the transition edge hemming mechanism 251 to hem the transition edge 2 of the automotive armrest skeleton 1 through the first control unit includes the following steps:

[0074] 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 enters 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.

[0075] 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 enter 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.

[0076] 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 automotive armrest skeleton 1 to the inner surface, and then enter step S2-4.

[0077] 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 automotive armrest skeleton, and then enter step S2-5.

[0078] 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.

[0079] 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.

[0080] Under the control of the control device 300, the process of the second control unit 262 controlling the non-transition edge hemming mechanism 252 to hem the non-transition edge 3 of the automotive armrest skeleton 1 through the second control unit includes the following steps:

[0081] In step S3-1, the second control unit controls the second flanging driving member 25212 to drive the second flanging block 25211 to move forward 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 step S3-2 is entered.

[0082] In step S3-2, the second control unit controls the second flanging driving member 25212 to drive the second flanging block 25211 to move downward, so that the skin covers the inner surface of the vehicle armrest skeleton, and then step S3-3 is entered.

[0083] In 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.

[0084] Functions and effects of the embodiment

[0085] According to the skin fixing device involved in this embodiment, it includes a profiling die, a pneumatic positioning unit and a vacuum generator. Multiple through holes are provided on the profiling die. The pneumatic positioning unit has positioning pins that match the positioning holes on the skin. Through the cooperation of the positioning pins and the positioning holes, the skin can be initially positioned, so that the skin can be accurately placed on the positioning pins and the profiling die. Then, the vacuum generator evacuates the through holes to suck and tighten the skin on the profiling die. Therefore, through this skin fixing device, rapid and accurate positioning of the skin can be achieved, and the device also has the advantages of simple structure and easy automation control.

[0086] Furthermore, since the profiling die in this embodiment includes a first die area, the first die area corresponds to the first skin area of the skin. The multiple through holes provided on the first die area are linearly distributed along the length direction of the profiling die. Therefore, it is convenient to avoid arranging through holes in the part corresponding to the sewing line on the first die area, thereby avoiding the influence on the sewing line connection part on the skin during subsequent vacuum positioning.

[0087] Furthermore, since the profiling die in this embodiment further includes a second die area, the multiple through holes in the through hole group on the second die area are linearly distributed along the width direction of the profiling die. This distribution direction is perpendicular to the arrangement direction of the through holes in the through hole group on the first die area. The different arrangements during vacuum pumping on the two die areas can enable the entire profiling die to achieve a better vacuum positioning effect on the skin.

[0088] Furthermore, since the number of pneumatic positioning units in this embodiment is the same as the number of positioning holes on the skin and they are correspondingly arranged, good positioning of the edge of the skin can be achieved.

[0089] Furthermore, since the pneumatic positioning unit in this embodiment drives the positioning pin to move down and up through the air cylinder, the positioning pin can provide the positioning function only during the process of pasting the skin, thus not interfering with the edge wrapping process of the subsequent edge wrapping device.

[0090] Furthermore, since through holes are also provided in the long side area of the profiling die in this embodiment, after the air cylinder drives the positioning pin to rise, the positioning pin passes through and out of the through holes, and the part of the positioning pin that passes through the through holes can position the skin. After the air cylinder drives the positioning pin to move down, the top of the positioning pin is lower than the top of the through holes. In this way, when the edge wrapping device performs edge wrapping, although the edge of the skin is no longer positioned by the positioning pin, it can still be supported by the long side area of the profiling die, thus achieving a better edge wrapping effect.

[0091] 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. An automotive armrest skin fixing device is used to fix the skin with positioning holes pre-cut at the edges. The skin is made of PVC and includes a first skin area and a second skin area. A stitch extending along the length direction is provided on the first skin area. It is characterized in that it includes: a fixing frame; a profiling die, fixedly arranged on the fixing frame, having a shape matching the shape of the automotive armrest skeleton for positioning the skin. A plurality of through holes are provided on the profiling die; a pneumatic positioning unit, fixedly arranged on the fixing frame, having positioning pins matching the positioning holes. The positioning pins are used to pass through the positioning holes so that the skin is positioned on the profiling die; a vacuum generator, fixedly arranged on the fixing frame, respectively communicated with a plurality of the through holes, used to evacuate the through holes to adsorb and tightly hold the skin on the profiling die, wherein, the plurality of through holes are arranged in through hole groups, and the number of through holes in each through hole group is 4 - 8, the profiling die includes a first die area corresponding to the first skin area and a second die area corresponding to the second skin area, a plurality of the through holes in the through hole group arranged on the first die area are linearly distributed along the length direction of the profiling die. The plurality of through hole groups are arranged in rows or columns. No through holes are provided in the part of the first die area corresponding to the stitch, a plurality of the through holes in the through hole group arranged on the second die area are linearly distributed along the width direction of the profiling die. The plurality of through hole groups are arranged in rows, the distribution direction of the through holes in the through hole group on the second die area is perpendicular to the arrangement direction of the through holes in the through hole group on the first die area.

2. The automotive armrest skin fixing device according to claim 1, characterized in that: wherein, the number of the positioning holes is multiple, and the multiple positioning holes are evenly distributed along the edge of the skin, the number of the pneumatic positioning units is the same as the number of the positioning holes, and the pneumatic positioning units are arranged beside the profiling die.

3. The automotive armrest skin fixing device according to claim 1, characterized in that: wherein, the pneumatic positioning unit further has a cylinder, and the cylinder drives the positioning pin to move down or up.

4. The automotive armrest skin fixing device according to claim 3, characterized in that: wherein, a through hole is further provided on the profiling die, and the positioning pin corresponds to the through hole, when the cylinder drives the positioning pin to rise, the positioning pin passes through and penetrates out of the through hole, and the part of the positioning pin penetrating out of the through hole is used to position the skin, when the cylinder drives the positioning pin to move down, the top of the positioning pin is lower than the top of the through hole.

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