Door cover edge wrapping device and method integrating welding, edge wrapping, testing and installation

Abstract

The present application belongs to the field of automotive parts technology, and specifically relates to a door cover hemming device and method that integrates welding, hemming, detection, and installation. The door cover hemming device includes an hemming mold, a trimming detection component, a hinge positioning component, a hole detection component, a fixture positioning component, and a welding component. The trimming detection component, the hinge positioning component, the hole detection component, the fixture positioning component, and the welding component are respectively arranged at corresponding positions of the hemming mold. A plurality of the segmented door outer panels are placed on the inner surface of the hemming mold. The trimming detection component is used to detect the trimming of the door cover. The hinge positioning component is used to install the hinge at the corresponding position of the door cover. The hole detection component is used to detect the hole size of the door cover. The fixture positioning component is used to clamp and position the door outer panel assembly and the door inner panel assembly. The welding component is used to weld a plurality of the segmented door outer panels into the door outer panel assembly. The present application reduces the number of steps in the door cover assembly, improves the saturation of the steps, and reduces the development cost of the hemming process.

Description

Technical Field

[0001] The present invention belongs to the technical field of automobile parts, and in particular relates to a door cover edge wrapping device and method integrating welding, edge wrapping, detection and installation. Background Art

[0002] The vehicle door cover is made by combining the inner panel and the outer panel together through the hemming process. The inner panel and the outer panel are sheet metal parts. Hemming refers to the connection of two sheet metal parts by wrapping the folded edge of one part around the periphery of another part when assembling. Vehicle door cover hemming is a relatively common process in traditional technology. The corresponding robot rolling or mold pressing accounts for a large proportion. Manual hemming is used in the trial production or small batch production of parts.

[0003] The door cover assembly process consists of inner panel welding, outer panel welding, hemming, hinge assembly, and assembly measurement. Each process requires corresponding tooling. Existing door cover assembly processes use independent tooling for each process, and the production lines are arranged sequentially. This results in a long overall process, large cumulative dimensional chain tolerances across different tooling, and complex dimensional chain quality control. This long process line also complicates dimensional chain quality control, resulting in a low pass rate for the finished door cover assembly. Installation onto the vehicle body is prone to various issues caused by assembly step differences. Furthermore, for trial production or small batch production, the long process line occupies a large space and increases development costs.

[0004] Therefore, a door cover edge binding device is needed to solve the above problems. Summary of the Invention

[0005] In response to the defects of the existing technology, the present invention proposes a door cover hemming device and method that integrates welding, hemming, testing and installation, with the aim of reducing the door cover assembly operation process, improving the process operation saturation and reducing the development cost of the hemming process.

[0006] In order to achieve the technical purpose of the present invention, the present invention will adopt the following technical solutions:

[0007] A door cover hemming device that integrates welding, hemming, testing, and installation. The door cover includes a door outer panel assembly and a door inner panel assembly. The door outer panel assembly is welded from multiple segmented door outer panels. The door cover hemming device includes an hemming die, a trimming detection component, a hinge positioning component, a hole position detection component, a fixture positioning component, and a welding component.

[0008] The trimming detection assembly, the hinge positioning assembly, the hole position detection assembly, the fixture positioning assembly and the welding assembly are respectively arranged at corresponding positions of the hemming mold; a plurality of the segmented door outer panels are placed on the inner surface of the hemming mold; the trimming detection assembly is used to detect the trimming of the door cover; the hinge positioning assembly is used to install the hinge at the corresponding position of the door cover; the hole position detection assembly is used to detect the hole position size of the door cover; the fixture positioning assembly is used to clamp and position the door outer panel assembly and the door inner panel assembly; the welding assembly is used to weld a plurality of the segmented door outer panels into the door outer panel assembly;

[0009] The welding assembly includes a lead-out welding electrode group and a lead-out welding conductive block group; there are multiple lead-out welding electrode groups and multiple lead-out welding conductive block groups, and multiple mounting seats for the lead-out welding electrode groups are opened in the top of the edging mold; the lead-out welding electrode group has a movable arm end and a static arm end, and the movable arm end has a welding point portion that matches the welding point area of ​​the door outer panel to be welded, and the door outer panel to be welded is located between the welding point portion of the movable arm end and the static arm end. A part of each lead-out welding conductive block group is installed on the support, and the other part is respectively connected to the welding point portion of the movable arm end and the static arm end.

[0010] Furthermore, the edging mold includes door outer panel positioning holes, supports and slots; several of the door outer panel positioning holes are distributed on the inner side of the inner surface edge of the edging mold, and the door outer panel positioning holes cooperate with the pins to detect the position of the holes of the segmented door outer panel; several of the supports are distributed on the periphery of the edging mold, and the hinge positioning assembly, the hole position detection assembly, the fixture positioning assembly and the welding assembly are respectively installed on the supports at corresponding positions; several of the slots are opened around the top of the edging mold.

[0011] Furthermore, the trimming detection assembly includes several detection blocks; each detection block is slidably connected to the slot, and the detection block performs trimming detection when it moves along the slot toward the inner side of the edge of the hemming mold; and the detection block is used for other operations when it moves along the slot toward the outer side of the edge of the hemming mold.

[0012] Furthermore, the hinge positioning assembly and the hole position detection assembly both include a flip pressure arm, the flip pressure arm of the hinge positioning assembly is equipped with a positioning pin for positioning the hinge, and the flip pressure arm of the hole position detection assembly is equipped with a marking pin for detecting the position of each hole in the door cover.

[0013] Furthermore, the fixture positioning assembly has at least two structures, namely a first positioning fixture and a second positioning fixture. The first positioning fixture and the second positioning fixture both include a flip pressure arm. The flip pressure arm of the first positioning fixture is equipped with a pressure head for pressing the door outer panel assembly and the door inner panel assembly, and the flip pressure arm of the second positioning fixture is equipped with a positioning pin for positioning the door inner panel assembly.

[0014] Furthermore, the fixture positioning assembly also includes a door outer panel positioning pin; and corresponding door outer panel positioning pin holes are opened on the edging mold and the door outer panel assembly.

[0015] Furthermore, the movable arm end has a copper electrode cap, and the stationary arm end has a chromium-zirconium copper plate.

[0016] Furthermore, the central axis of the copper electrode cap is perpendicular to the bonding surface between the chromium-zirconium copper plate and the weldment.

[0017] The present invention also discloses a method for the door cover hemming device as described in any one of the above items, the method comprising the following steps:

[0018] Step 1: Welding the segmented door outer panel;

[0019] Place the segmented door outer panel on the hemming mold, use the positioning pin to install it on the detection hole of the hemming mold, and at the same time, knock down the second positioning fixture to press the door outer panel into position; the position sensor contacts and recognizes that the segmented door outer panel is installed in place, and the lead-out welding electrode group knocks down the welding point that presses the door outer panel. The door outer panel to be welded is located between the welding point part of the movable arm end and the static arm end. Use a resistance welding gun to energize the lead-out welding conductive block group for welding, and the segmented door outer panel is assembled into a door outer panel assembly. After welding is completed, the lead-out welding electrode group is opened in reverse, and the second positioning fixture is opened in reverse;

[0020] Step 2: Assemble the door outer panel assembly and the door inner panel assembly;

[0021] Apply glue to the welded door outer panel assembly, install the door inner panel assembly to the designated position of the door outer panel assembly, flip the first positioning fixture to position the door inner panel assembly, flip the second positioning fixture to press the door outer panel assembly and the door inner panel assembly together, use a rubber hammer to wrap the edge of the door outer panel assembly, fix the door inner panel assembly to the door outer panel assembly, and form the door cover;

[0022] Step 3: Measure the door cover hole position;

[0023] Turn over the hole position detection assembly so that the marking pin is inserted into the corresponding hole of the door cover to detect the position of the hole. After the detection is completed, turn over the hole position detection assembly in the reverse direction to open it;

[0024] Step 4: Door cover cutting edge detection;

[0025] After the hole position measurement is completed, the detection block on the edge of the hemming mold is pushed along the slot to the inner side of the edge of the hemming mold and locked. The theoretical measurement gap between the detection block and the door cover is Nmm. Use a vernier caliper to measure the gap between the door cover cutting edge and each detection block. The data obtained is the cutting edge status of the door cover. Based on the measurement data, it is judged whether the door cover is qualified;

[0026] Step 4: Door cover cutting edge detection;

[0027] Door cover hinge installation.

[0028] Step 4: After the door cover trimming inspection is completed, push the inspection block along the slot to the outside of the edge of the hemming mold and lock it, flip the hinge positioning assembly over and knock it down. At this time, the hinge is aligned with the hinge installation position of the door cover, lock the locking handle of the hinge positioning assembly, and fix the hinge to the door cover with a wrench and bolts.

[0029] Furthermore, a step of detecting the trimming of the door outer panel assembly is added between step 1 and step 2.

[0030] The beneficial effects of the present invention are:

[0031] The present invention reduces the number of door cover assembly operation procedures, improves the operation saturation of the process, and reduces the development cost of the hemming process; reduces the dimension chain, reduces the difficulty of quality control, and reduces defects such as process and precision; the present invention can effectively reduce production costs through trial production, reduce the quality risks of assembly appearance and dimensions, and shorten the process for trial production or small batch projects to achieve a match between cycle time and cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a three-dimensional structural diagram of a door cover hemming device integrating welding, hemming, testing, and installation according to an embodiment of the present invention;

[0033] Figure 2 This is a top view of a door cover hemming device integrating welding, hemming, testing, and installation according to an embodiment of the present invention;

[0034] Figure 3 yes Figure 2 AA cross-sectional view;

[0035] Figure 4 3D diagram of the hemming die according to an embodiment of the present invention;

[0036] Figure 5 yes Figure 4 A partial enlarged view of I;

[0037] Figure 6 yes Figure 2 A partial enlarged view of H;

[0038] Figure 7is a three-dimensional structural diagram of a hinge positioning assembly according to an embodiment of the present invention;

[0039] Figure 8 is a three-dimensional structural diagram of a hole position detection assembly according to an embodiment of the present invention;

[0040] Figure 9 is a three-dimensional structural diagram of a first positioning fixture according to an embodiment of the present invention;

[0041] Figure 10 is a three-dimensional structural diagram of a second positioning fixture according to an embodiment of the present invention;

[0042] Figure 11 is a three-dimensional structural diagram of a welding assembly according to an embodiment of the present invention;

[0043] Figure 12 is a side view of a welding assembly according to an embodiment of the present invention;

[0044] Figure 13 This is a three-dimensional structural diagram of the lead-out welding electrode group according to an embodiment of the present invention;

[0045] Figure 14 It is a three-dimensional structural diagram of the lead-out welding conductive block group according to an embodiment of the present invention.

[0046] Among them, 1-edge mold; 10-door outer panel positioning hole; 11-support; 12-latch; 13-slot; 2-edge cutting detection assembly; 20-detection block; 21-locking bolt; 3-hinge positioning assembly; 4-hole detection assembly; 5-fixture positioning assembly; 50-first positioning fixture; 51-second positioning fixture; 6-welding assembly; 60-lead welding electrode group; 600-flip arm; 601-flip cylinder; 602-copper electrode cap; 603-copper electrode rod; 604-copper electrode seat; 605-chromium zirconium copper plate; 61-lead welding conductive block group; 610-first welding copper block; 611-second welding copper block; 612-copper plate line brand; A-door outer panel assembly; B-door inner panel assembly; C-hinge. DETAILED DESCRIPTION

[0047] In order to enable those skilled in the art to better understand the technical solution of the present application, the present application will be further described in detail below with reference to the accompanying drawings and embodiments.

[0048] The terms "up", "down", "left", "right", "front", and "back" in this application are based on the positional relationships shown in the accompanying drawings. The corresponding positional relationships may vary depending on the drawings, and should not be construed as limiting the scope of protection.

[0049] In this application, the terms "installed," "connected," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, integral connection, mechanical connection, electrical connection, or mutual communication. They can also be directly connected or indirectly connected through an intermediate medium. They can also refer to internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0050] The present invention aims to provide a door cover hemming device and a method for performing the same, integrating welding, hemming, testing, and installation. The door cover hemming device reduces the number of steps required for door cover assembly, improves process saturation, and reduces hemming process development costs. It also reduces dimensional chains, eases quality control difficulties, and mitigates process and precision defects.

[0051] Example 1

[0052] Refer to the instruction manual Figure 1-3 A door cover hemming device integrating welding, hemming, detection and installation includes an hemming mold 1, a cutting edge detection component 2, a hinge positioning component 3, a hole position detection component 4, a fixture positioning component 5 and a welding component 6.

[0053] The trimming detection component 2, the hinge positioning component 3, the hole position detection component 4, the fixture positioning component 5 and the welding component 6 are respectively arranged at the corresponding positions of the hemming mold 1. The door cover includes a door outer panel assembly A and a door inner panel assembly B. The door outer panel assembly A is welded by multiple segmented door outer panels. The multiple segmented door outer panels are placed in the inner surface of the hemming mold 1. The door inner panel assembly B is placed on the top of the door outer panel assembly A. Figure 3 In the placement state shown, the door inner panel assembly B is combined with the door outer panel assembly A to form a door cover by hemming the edges of the door outer panel assembly A.

[0054] The trim inspection assembly 2 is used to inspect the trimming of the door cover for compliance. The hinge positioning assembly 3 is used to install the hinges in the corresponding positions on the door cover. The hole detection assembly 4 is used to inspect the dimensions of holes in the door cover, such as hinge mounting holes, trim mounting holes, and lock holes. The fixture positioning assembly 5 is used to securely clamp the door outer panel assembly A and the door inner panel assembly B in place. The welding assembly 6 is used to weld multiple segmented door outer panels together to form the door outer panel assembly A.

[0055] It should be noted that the positions of the trimming detection component 2, the hinge positioning component 3, the hole position detection component 4, the fixture positioning component 5 and the welding component 6 are all uniformly positioned based on the modeling reference hole of the edging mold 1 to ensure that the door cover edging device has a short size chain and high dimensional accuracy.

[0056] The hemming mold 1 of this embodiment further includes an in-place sensor, which is installed at a specified position of the hemming mold 1. The in-place sensor is a contact sensor for identifying whether the part is installed in place.

[0057] By adopting the structure of this embodiment, the welding, hemming, detection and installation processes are integrated into one device through the hemming mold 1, the trimming detection component 2, the hinge positioning component 3, the hole detection component 4, the fixture positioning component 5 and the welding component 6. Compared with the long process chain of the traditional door cover assembly, the integrated structure of this embodiment is compact, the cumulative assembly tolerance of different processes is small, the quality of the manufactured product is high, the dimensional chain quality control is simple, the trial production cost is reduced, the overall device is easy to place, and takes up little space. It is suitable for trial production of parts or small batch production.

[0058] Example 2

[0059] Refer to the instruction manual Figure 4-6 Based on Example 1, the top inner surface of the hemming mold 1 matches the styling features of the door outer panel assembly A, allowing the door outer panel assembly A to fit naturally with the inner surface of the hemming mold 1. The hemming mold 1 includes a door outer panel positioning hole 10, a support 11, a latch 12, and a slot 13.

[0060] Several door outer panel positioning holes 10 are distributed on the inner edge of the inner surface of the hemming mold 1. Each door outer panel positioning hole 10 matches the corresponding hole of the segmented door outer panel. The corresponding latch 12 is inserted into the hole of the segmented door outer panel and the door outer panel positioning hole 10 to detect the hole position of the segmented door outer panel. Several supports 11 are distributed on the periphery of the hemming mold 1. The supports 11 are provided with corresponding reference holes and threaded holes, such as Figure 4 As shown in the example, this embodiment has 12 door outer panel positioning holes 10. The hinge positioning assembly 3, hole position detection assembly 4, fixture positioning assembly 5, and welding assembly 6 are respectively mounted on a number of supports 11 at corresponding positions. A plurality of slots 13 are formed around the top of the hemming mold 1. Each slot 13 has an internally threaded hole at the top. One end of each slot 13 communicates with the outer side of the top edge of the hemming mold 1, while the other end does not communicate with the inner side of the top edge of the hemming mold 1.

[0061] The number of the trimming detection components 2 corresponds to the number of the slots 13 . The trimming detection components 2 include a detection block 20 and a locking bolt 21 .

[0062] The detection block 20 has a boss at its bottom and an oblong hole extending vertically through its top. This oblong hole facilitates the sliding of the detection block 20. During trimming inspection, the detection block 20 is slid toward the inside of the hemming mold 1. After the inspection is complete, the detection block 20 is slid toward the outside of the hemming mold 1 to prevent the hemming operation and trimming inspection from interfering with each other. The bottom surface of the boss of the detection block 20 abuts against the top surface of the retaining groove 13. The locking bolt 21 passes through the oblong hole of the detection block 20 and is screwed into the internal threaded hole of the retaining groove 13.

[0063] By adopting the structure of this embodiment, two processes of the door cover hemming device, namely the hemming operation and the trimming detection, are realized.

[0064] Example 3

[0065] Refer to the instruction manual Figure 2 and attached Figure 7-8 On the basis of embodiment 2, there are at least two hinge positioning components 3 and hole position detection components 4, and each hinge positioning component 3 and hole position detection component 4 is installed as a set on a support 11. Figure 2 Taking the top view of the door cover hemming device as an example, each set of hinge positioning components 3 and hole position detection components 4 are symmetrically installed on the supports 11 on both sides above the door cover hemming device.

[0066] Both the hinge positioning assembly 3 and the hole position detection assembly 4 include a first connecting block connected to the support 11 and a flip pressure arm connected to the connecting block. The difference between the hinge positioning assembly 3 and the hole position detection assembly 4 is that the chain positioning assembly 3 also includes a hinge positioning pin with a second connecting block, and the hole position detection assembly 4 also includes a marking pin with a third connecting block. The second connecting block of the chain positioning assembly 3 is connected to the flip pressure arm, and the hinge positioning pin is connected to the hinge C. By flipping the flip pressure arm, the hinge C is positioned at the corresponding position of the door cover assembly, and the bolt is fixed to the hinge C and the door cover assembly with a wrench. The hole position detection assembly 4 flips the flip pressure arm to insert the marking pin into the corresponding hole of the door cover assembly to detect the position.

[0067] The positions of the hinge locating pin with the second connecting block and the marking pin with the third connecting block match the features of the door cover assembly, and the positions of the hinge locating pin are set based on the reference hole of the hemming mold 1 .

[0068] It should be noted that the flip pressing arm is provided with Figure 7-8 The locking handle has a screw rod, and the locking handle is selected to abut against the bottom of the flip pressure arm, and the flip pressure arm is locked after locking.

[0069] In another embodiment, according to the detection requirements of different hole positions of the door cover, multiple hole position detection components 4 are added and installed on the corresponding supports 11.

[0070] By adopting the structure of this embodiment, the hole position detection of the door cover hemming device and the installation of the hinge C are realized, the detection is accurate, the installation is convenient, and the work efficiency is improved.

[0071] Example 4

[0072] Refer to the instruction manual Figure 2 and attached Figure 9-10 Based on Example 2, the fixture positioning assembly 5 has at least two structures, namely a first positioning fixture 50 and a second positioning fixture 51.

[0073] The first positioning fixture 50 is used to position the door inner panel assembly B, and the second positioning fixture 51 is used to press the door outer panel assembly A and the door inner panel assembly B together. There are multiple first positioning fixtures 50 and second positioning fixtures 51, and each first positioning fixture 50 and second positioning fixture 51 is installed on a support 11. Figure 2 Taking the top view of the door cover edging device as an example, each first positioning fixture 50 is symmetrically installed on the lower supports 11 on the left and right sides of the door cover edging device, and each second positioning fixture 51 is installed on the remaining supports 11 of the door cover edging device.

[0074] The first positioning fixture 50 and the second positioning fixture 51 have partially identical structures to the hinge positioning assembly 3 and the hole position detection assembly 4, and both include a first connecting block connected to the support 11 and a flip pressure arm connected to the connecting block. The difference between the first positioning fixture 50 and the second positioning fixture 51 is that the first positioning fixture 50 also includes a positioning pin with a third connecting block, while the second positioning fixture 51 also includes a pressure head with a fourth connecting block. The first positioning fixture 50 positions the door inner panel assembly B by flipping the pressure arm so that the positioning pin is inserted into the corresponding pin hole of the door inner panel assembly B. The second positioning fixture 51 presses the pressure head against the surface of the door inner panel assembly B by flipping the pressure arm so that the pressure head presses against the surface of the door inner panel assembly B, thereby pressing the door outer panel assembly A, which is in contact with the door inner panel assembly B, against the hemming mold 1.

[0075] In another embodiment, the fixture positioning assembly 5 also includes a door outer panel positioning pin, and corresponding door outer panel positioning pin holes are opened on the edging mold 1 and the door outer panel assembly A. The door outer panel positioning pin and the door outer panel positioning pin hole cooperate to position the door outer panel assembly A on the edging mold 1, further improving the positioning and clamping of the door outer panel assembly A and the door inner panel assembly B during the edging process.

[0076] By adopting the structure of this embodiment, the clamping and positioning function of the door cover edge binding device is realized, thereby preventing the door outer panel assembly A and the door inner panel assembly B from moving during edge binding, welding, measurement and assembly operations.

[0077] Example 5

[0078] Refer to the instruction manual Figure 11-14On the basis of Example 2, the welding assembly 6 includes a lead-out welding electrode group 60 and a lead-out welding conductive block group 61. There are multiple lead-out welding electrode groups 60 and lead-out welding conductive block groups 61, and the number is matched. The top of the hemming mold 1 is provided with multiple mounting seats for the lead-out welding electrode groups 60, such as Figure 11 In the illustrated state, the four lead-out welding electrode groups 60 are arranged in pairs facing each other. The lead-out welding electrode groups 60 have a movable arm end and a stationary arm end. The movable arm end has a welding spot portion that matches the welding spot area of ​​the door outer panel to be welded. The door outer panel to be welded is located between the welding spot portion of the movable arm end and the stationary arm end. Each lead-out welding conductive block group 61 has a portion mounted on the support 11, and the other portion is connected to the welding spot portion of the movable arm end and the stationary arm end, respectively. The portion connected to the welding spot portion of the movable arm end serves as the positive electrode for welding, and the portion connected to the stationary arm end serves as the negative electrode for welding.

[0079] The lead-out welding electrode assembly 60 includes a tilting arm 600, a tilting cylinder 601 (e.g., AirTac custom cylinder), a copper electrode cap 602, a copper electrode rod 603, a copper electrode holder 604, and a chromium-zirconium copper plate 605. The lead-out welding conductive block assembly 61 includes a first welding copper block 610, a second welding copper block 611, and a copper plate wire plate 612.

[0080] In this embodiment, each lead-out welding electrode group 60 has two flip arms 600 and a flip cylinder 601. Each of the two flip arms 600 is connected to a copper electrode holder 604. Multiple copper electrode rods 603 are spaced apart inside the copper electrode holder 604. A copper electrode cap 602 is mounted on each copper electrode rod 603. Each chromium-zirconium copper plate 605 is mounted at a corresponding position on the hemming mold 1 and is arranged opposite the copper electrode cap 602 of each lead-out welding electrode group 60. The outer door panel to be welded is tightly fitted with the chromium-zirconium copper plate 605 and is located between the copper electrode cap 602 and the chromium-zirconium copper plate 605. The flipping of the flip arm 600 drives the weld point of each copper electrode cap 602 to coincide with the outer door panel. The copper electrode cap 602 is the welding point of the movable arm end, and the chromium-zirconium copper plate 605 is the static arm end.

[0081] Furthermore, the central axis of the copper electrode cap 602 at the boom end is perpendicular to the bonding surface between the chromium-zirconium copper plate 605 and the weldment.

[0082] like Figure 11Taking the illustrated state as an example, two sets of welding copper block groups are installed on the supports 11 on both sides below the hemming mold 1. Each welding copper block group includes a first welding copper block 610 and a second welding copper block 611. Each lead-out welding electrode group 60 has two copper plate wire plates 612. The first welding copper block 610 is connected to the copper electrode cap 602 via a copper plate wire plate 612. The copper plate wire plate 612 is used to lead the movable arm end welding electrode to the first welding copper block 610, which is the welding positive electrode; the second welding copper block 611 is connected to the chromium-zirconium copper plate 605 via another copper plate wire plate 612. The copper plate wire plate 612 is used to lead the static arm end welding conductive electrode to the second welding copper block 611, which is the welding negative electrode.

[0083] After applying a certain pressure at the welding point (copper electrode cap 602) through the flip arm 600 and the flip cylinder 601, power is applied to the welding copper block group through the external resistance welding clamp to increase the current and plate resistance for a certain period of time. The current is transmitted to the electrode at the end of the movable arm through the copper plate wire plate 612. The electrode presses the outer door panel and forms a weld nugget after cooling, thereby welding the welding point of the outer panel.

[0084] By adopting the structure of this embodiment, one end of two copper plate wire plates 612 are respectively connected to the movable arm end and the static arm end, and the other end is respectively connected to two welded copper blocks to form a current loop, and the welding process of multiple door outer panels is realized through the basic principle of resistance spot welding.

[0085] The door cover edging device of the present invention, which integrates welding, edging, testing and installation, integrates edging, welding, measurement and assembly processes into one integrated whole to adapt to different production modes. Compared with traditional independent process devices, the applicant has reduced equipment costs by about 110,000 yuan and reduced costs by about 35%.

[0086] Example 6

[0087] Based on the above embodiments 1-5, this embodiment provides a method for a door cover hemming device that integrates welding, hemming, testing, and installation, and the method includes:

[0088] Step 1: Weld the segmented door outer panels.

[0089] Place the segmented door outer panel on the edging mold 1, use the positioning pin to install it on the detection hole of the edging mold 1, and at the same time knock down the second positioning fixture 51 to press the door outer panel into position; the position sensor contacts and recognizes that the segmented door outer panel is installed in place, and the lead-out welding electrode group 60 knocks down the welding point that presses the door outer panel. The door outer panel to be welded is located between the welding point part of the movable arm end and the static arm end. Use a resistance welding gun to energize and weld the lead-out welding conductive block group 61 to assemble the segmented door outer panel into a door outer panel assembly. After welding is completed, the lead-out welding electrode group 60 is opened in reverse, and the second positioning fixture 51 is opened in reverse.

[0090] Step 2: Assemble the door outer panel assembly and the door inner panel assembly.

[0091] Apply glue to the welded door outer panel assembly, install the door inner panel assembly to the specified position of the door outer panel assembly, flip the first positioning fixture 50 to position the door inner panel assembly, flip the second positioning fixture 51 to press the door outer panel assembly and the door inner panel assembly together, use a rubber hammer to wrap the edge of the door outer panel assembly, fix the door inner panel assembly on the door outer panel assembly to form a door cover.

[0092] Step 3: Measure the door cover hole position.

[0093] The hole position detection assembly 4 is turned over to insert the marking pin into the corresponding hole of the door cover to detect the position of the hole. After the detection is completed, the hole position detection assembly 4 is reversed and opened.

[0094] In this embodiment, the diameter of the marking pin is 3-4 mm smaller than the diameter of the door cover hole.

[0095] Step 4: Door cover edge inspection.

[0096] After the hole position measurement is completed, the detection block 20 on the edge of the hemming mold 1 is pushed along the slot 13 toward the inner side of the edge of the hemming mold 1 and locked. The theoretical measurement gap between the detection block 20 and the door cover is 5 mm. Use a vernier caliper to measure the gap between the door cover cutting edge and each detection block 20. The data obtained is the cutting edge status of the door cover, and whether the door cover is qualified is judged based on the measurement data.

[0097] Step 5: Door cover hinge installation.

[0098] Step 4: After the door cover trimming inspection is completed, push the inspection block 20 along the slot 13 to the outside of the edge of the edging mold 1 and lock it, flip the hinge positioning assembly 3 over and knock it down. At this time, the hinge is aligned with the hinge installation position of the door cover, lock the locking handle of the hinge positioning assembly 3, and fix the hinge to the door cover with a wrench and bolts.

[0099] In another method of using the door cover edging device, a door outer panel assembly trimming detection step is added between step 1 and step 2 to detect whether the trimming of the door outer panel assembly before edging is qualified, thereby improving the overall quality of the door cover. The detection method is the same as step 4, and the measured theoretical gap between the detection block 20 and the door outer panel assembly is based on the setting.

[0100] The above is only an embodiment of the present invention, and common sense such as the specific structure and characteristics of the scheme are not described in detail here. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claim involved.

Claims

1. A door cover hemming device integrating welding, hemming, testing and installation, wherein the door cover comprises a door outer panel assembly and a door inner panel assembly, wherein the door outer panel assembly is welded by a plurality of segmented door outer panels, characterized in that: The door cover edge wrapping device comprises an edge wrapping die (1), an edge trimming detection component (2), a hinge positioning component (3), a hole position detection component (4), a fixture positioning component (5) and a welding component (6); The trimming detection component (2), the hinge positioning component (3), the hole position detection component (4), the fixture positioning component (5) and the welding component (6) are respectively arranged at corresponding positions of the edge wrapping mold (1); a plurality of the segmented door outer panels are placed on the inner surface of the edge wrapping mold (1); the trimming detection component (2) is used to detect the trimming of the door cover; the hinge positioning component (3) is used to install the hinge at the corresponding position of the door cover; the hole position detection component (4) is used to detect the hole position size of the door cover; the fixture positioning component (5) is used to clamp and position the door outer panel assembly and the door inner panel assembly; the welding component (6) is used to weld a plurality of the segmented door outer panels into the door outer panel assembly; The welding assembly (6) includes a lead-out welding electrode group (60) and a lead-out welding conductive block group (61); there are a plurality of the lead-out welding electrode group (60) and the lead-out welding conductive block group (61), and a plurality of mounting seats for the lead-out welding electrode group (60) are opened in the top of the edge wrapping mold (1); the lead-out welding electrode group (60) has a movable arm end and a stationary arm end, the movable arm end has a welding point portion that matches the welding point area of ​​the door outer panel to be welded, and the door outer panel to be welded is located between the welding point portion of the movable arm end and the stationary arm end, and a part of each lead-out welding conductive block group (61) is installed on the edge wrapping mold (1), and the other part is respectively connected to the welding point portion of the movable arm end and the stationary arm end; The edge wrapping mold (1) includes a door outer panel positioning hole (10), a support (11) and a slot (13); a plurality of the door outer panel positioning holes (10) are distributed on the inner side of the inner surface edge of the edge wrapping mold (1), and the door outer panel positioning holes (10) cooperate with the latch to detect the position of the hole of the segmented door outer panel; a plurality of the supports (11) are distributed on the periphery of the edge wrapping mold (1), and the hinge positioning component (3), the hole position detection component (4), the fixture positioning component (5) and the welding component (6) are respectively installed on the supports (11) at corresponding positions; a plurality of the slots (13) are opened around the top of the edge wrapping mold (1); The edge trimming detection assembly (2) includes a plurality of detection blocks (20); each detection block (20) is slidably connected to the card slot (13); the detection block (20) performs edge trimming detection when it moves along the card slot (13) toward the inner side of the edge of the edge wrapping mold (1); and the detection block (20) is used for other operations when it moves along the card slot (13) toward the outer side of the edge of the edge wrapping mold (1).

2. The door cover edge binding device according to claim 1, characterized in that: The hinge positioning assembly (3) and the hole position detection assembly (4) both comprise a flip pressure arm, the flip pressure arm of the hinge positioning assembly (3) being equipped with a positioning pin for positioning the hinge, and the flip pressure arm of the hole position detection assembly (4) being equipped with a marking pin for detecting the position of each hole of the door cover.

3. The door cover edge binding device according to claim 1, characterized in that: The fixture positioning assembly (5) has at least two structures, namely a first positioning fixture (50) and a second positioning fixture (51), wherein the first positioning fixture (50) and the second positioning fixture (51) both include a flip pressure arm, the flip pressure arm of the first positioning fixture (50) is equipped with a pressure head for pressing the door outer panel assembly and the door inner panel assembly, and the flip pressure arm of the second positioning fixture (51) is equipped with a positioning pin for positioning the door inner panel assembly.

4. The door cover hemming device according to claim 3, characterized in that: The fixture positioning assembly (5) further includes a door outer panel positioning pin; and corresponding door outer panel positioning pin holes are provided on the edge wrapping mold (1) and the door outer panel assembly.

5. The door cover edge binding device according to claim 1, characterized in that: The movable arm end has a copper electrode cap (602), and the stationary arm end has a chromium-zirconium copper plate (605).

6. The door cover edge binding device according to claim 5, characterized in that: The central axis of the copper electrode cap (602) is perpendicular to the bonding surface between the chromium-zirconium copper plate (605) and the weldment.

7. A method for the door cover hemming device according to any one of claims 1 to 6, characterized in that: The method comprises the following steps: Step 1: Welding the segmented door outer panel; The segmented door outer panel is placed on the hemming mold (1), and a positioning pin is used to install it on the detection hole of the hemming mold (1), and at the same time, the second positioning fixture (51) is knocked down to press the door outer panel into position; the position sensor contacts and recognizes that the segmented door outer panel is installed in place, and the lead-out welding electrode group (60) is knocked down to press the welding point of the door outer panel, and the door outer panel to be welded is located between the welding point part of the movable arm end and the static arm end, and the lead-out welding conductive block group (61) is energized and welded using a resistance welding gun, and the segmented door outer panel is formed into a door outer panel assembly, and after welding is completed, the lead-out welding electrode group (60) is opened in reverse, and the second positioning fixture (51) is opened in reverse; Step 2: Assemble the door outer panel assembly and the door inner panel assembly; Apply glue to the welded door outer panel assembly, install the door inner panel assembly to the designated position of the door outer panel assembly, flip the first positioning fixture (50) to position the door inner panel assembly, flip the second positioning fixture (51) to press the door outer panel assembly and the door inner panel assembly together, use a rubber hammer to perform hemming along the door edge of the door outer panel assembly, fix the door inner panel assembly on the door outer panel assembly, and form a door cover; Step 3: Measure the door cover hole position; The hole position detection assembly (4) is turned over so that the marking pin is inserted into the corresponding hole of the door cover to detect the position of the hole. After the detection is completed, the hole position detection assembly (4) is turned over in the reverse direction to open; Step 4: Door cover cutting edge detection; After the hole position measurement is completed, the detection block (20) on the edge of the hemming mold (1) is pushed along the slot (13) toward the inner side of the edge of the hemming mold (1) and locked. The theoretical measurement gap between the detection block (20) and the door cover is Nmm. A vernier caliper is used to measure the gap between the door cover cutting edge and each detection block (20). The data obtained is the cutting edge state of the door cover. Based on the measurement data, it is determined whether the door cover is qualified. Step 4: Door cover cutting edge detection; Door cover hinge installation; Step 4 After the door cover trimming inspection is completed, push the inspection block (20) along the card slot (13) to the outside of the edge of the hemming mold (1) and lock it, flip the hinge positioning assembly (3) and knock it down. At this time, the hinge is aligned with the hinge installation position of the door cover, lock the locking handle of the hinge positioning assembly (3), and fix the hinge to the door cover with a wrench and bolts.

8. The method for edge binding of a door cover according to claim 7, characterized in that: Add the trimming inspection step of the door outer panel assembly between step 1 and step 2.

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