阅读说明：本技术 用于汽车中央储物盒的热熔焊接设备及焊接方法 (Hot-melt welding equipment and welding method for automobile central storage box ) 是由 薛国强 于 2021-04-30 设计创作，主要内容包括：本发明涉及汽车塑料件的焊接技术领域,具体涉及一种用于汽车中央储物盒的热熔焊接设备及焊接方法。该热熔焊接设备包括支座、平台、下压机构、焊接装置、对塑料组件实施定位夹紧的固定装置和协助将塑料组件上料和下料的翻转机构。该设备将塑料组件放置在固定装置的底板上。利用定位块对塑料组件实施定位,夹具夹紧。下压动力缸驱动压板沿着下压滑轨靠近平台,并通过压头向塑料组件施加压紧力。第一焊接动力缸驱动安装板沿着焊接滑轨的延伸方向靠近塑料组件,热铆焊组件的铆焊头抵在塑料组件上完成铆焊操作。该设备提升了塑料组件在焊接后的连接强度,降低了焊接产生的热应力对塑料组件设计尺寸的影响,进一步提高了塑料组件的焊接效率。(The invention relates to the technical field of welding of automobile plastic parts, in particular to hot-melt welding equipment and a welding method for an automobile central storage box. The hot melting welding equipment comprises a support, a platform, a pressing mechanism, a welding device, a fixing device for positioning and clamping the plastic assembly and a turnover mechanism for assisting in feeding and discharging the plastic assembly. The apparatus places the plastic component on the floor of the fixture. And positioning the plastic component by using the positioning block, and clamping the clamp. The lower-pressure power cylinder drives the pressing plate to be close to the platform along the lower-pressure sliding rail, and pressing force is applied to the plastic component through the pressing head. The first welding power cylinder drives the mounting plate to be close to the plastic component along the extending direction of the welding slide rail, and the rivet welding head of the hot rivet welding component abuts against the plastic component to complete rivet welding operation. The equipment improves the connection strength of the plastic assembly after welding, reduces the influence of thermal stress generated by welding on the design size of the plastic assembly, and further improves the welding efficiency of the plastic assembly.)

1. A hot-melt welding device for an automobile central storage box is characterized by comprising a support, a platform, a pressing mechanism, a welding device, a fixing device for positioning and clamping a plastic component and a turnover mechanism for assisting in feeding and discharging the plastic component;

the welding device comprises a support, a platform, a welding device and a fixing device, wherein the platform is fixedly arranged on the support, the platform is provided with a welding slide rail for the welding device to slide, the welding slide rail comprises a left side slide rail and a right side slide rail, and the fixing device is positioned between the left side slide rail and the right side slide rail;

the fixing device comprises a bottom plate and a positioning block for positioning the plastic component, the positioning block is fixedly arranged on the bottom plate, a clamping hole is formed in the positioning block, a clamp for clamping the plastic component is arranged in the clamping hole, the bottom plate is provided with a turning axis, and a connecting seat is arranged at the turning end of the bottom plate;

the turnover mechanism comprises a turnover base and a turnover power cylinder for driving the bottom plate to rotate around a turnover axis, wherein the fixed end of the turnover power cylinder is hinged with a fixed seat, the end of a piston rod of the turnover power cylinder is hinged with a connecting piece, the bottom of the fixed seat is fixedly arranged on the platform, the connecting piece is fixedly arranged on the bottom plate, a pair of turnover bases is fixedly arranged on the platform, a turnover shaft is arranged between the pair of turnover bases, and the turnover shaft is connected with the connecting seat;

the welding device comprises a hot rivet welding assembly, a first welding power cylinder and an installation plate, wherein the hot rivet welding assembly is fixedly installed on the installation plate, the bottom of the installation plate is connected with a welding slide rail through a welding slide seat, the first welding power cylinder is fixedly installed on the platform, and the piston rod end of the first welding power cylinder is connected with the installation plate;

the mechanism of pushing down is located the top of platform, the mechanism of pushing down includes the clamp plate, pushes down the slide rail and drives the clamp plate along pushing down the gliding power cylinder that pushes down of slide rail, push down slide rail fixed mounting on the platform, and the extending direction perpendicular to platform's of push down the guide rail terminal surface, the clamp plate links to each other with the push down guide rail through pushing down the slide, the tailpiece of the piston rod of the power cylinder that pushes down links to each other with the clamp plate, the bottom of clamp plate is provided with the pressure head.

2. The hot-melt welding device for the automobile central storage box according to claim 1, wherein a welding port is formed in the platform and located between the left side sliding rail and the right side sliding rail, a hot rivet welding assembly is arranged in the welding port and fixedly mounted on the mounting plate, a second welding power cylinder is arranged at the bottom of the mounting plate and fixedly mounted on a support, a piston rod end of the second welding power cylinder is connected with the bottom of the mounting plate, a guide mechanism for ensuring the movement precision of the second welding power cylinder is arranged at the bottom of the platform, and a through hole for the hot rivet welding assembly to pass through is formed in a bottom plate of the fixing device.

3. The hot melt welding device for the automobile central storage box according to claim 1 or 2, wherein the hot rivet welding assembly is a non-contact infrared plastic hot melt welding head.

4. The hot melt welding apparatus for the automobile central storage box according to claim 3, wherein the turnover power cylinder is an oil cylinder or an air cylinder.

5. The hot melt welding device for the automobile central storage box according to claim 1, wherein an enclosure is arranged on the platform, the enclosure is arranged along the outer side edge of the platform to enclose a processing area, the enclosure is provided with an opening for the plastic component to enter and exit the processing area, and a safety grating is arranged at the opening.

6. The apparatus of claim 1, wherein the platform is provided with a pillar, the pillar is provided with a first sensor for detecting a rotational position of the turnover mechanism, and the fixing device is provided with a second sensor and a third sensor for detecting an outer shape of the plastic member on the bottom plate.

7. The apparatus for thermally welding an automobile center storage box according to claim 1, wherein the turnover mechanism has a first station where a plastic component is placed and a second station where the plastic component is welded.

8. The hot-melt welding device for the automobile central storage box according to claim 1, wherein the plastic component comprises a main panel, a left side plate and a right side plate, a riveting column is arranged on the side wall of the main panel, mounting holes matched with the riveting column are formed in the left side plate and the right side plate, and a reinforcing plate is arranged at the front end of the main panel.

9. A welding method using the thermal welding apparatus for the center storage box of the automobile according to any one of claims 1 to 8, comprising: the plastic component is arranged on a bottom plate of the fixing device, the clamp is clamped after the plastic component is positioned by the positioning block, the downward pressing power cylinder driving pressing plate is close to the platform along the extending direction of the downward pressing sliding rail, pressing force is applied to the plastic component through the pressing head, the first welding power cylinder driving mounting plate is close to the plastic component along the extending direction of the welding sliding rail, and the rivet welding head of the hot rivet welding component abuts against the plastic component to complete rivet welding operation.

10. The welding method of claim 9, wherein the rivet welding operation comprises: the rivet welding head of the hot rivet welding assembly compresses the plastic assembly, the rivet column is heated inside the hot rivet welding assembly through laser radiation, and the punch of the hot rivet welding assembly punches the rivet column to form the locking rivet head.

Technical Field

The invention relates to the technical field of welding of automobile plastic parts, in particular to hot-melt welding equipment and a welding method for an automobile central storage box.

Background

At present, automotive interior parts are usually formed by splicing large plastic parts and are used for realizing the light weight of an automobile body and improving the decoration of the interior of an automobile. In order to further improve the installation efficiency of the vehicle body final assembly, the automotive interior trim part is pre-installed when entering a final assembly workshop. For example, for complex large components such as an instrument panel, a door interior trim panel, and a glove box, a suitable welding process is selected to splice plastic parts together according to the requirements of materials, structures, performance, and the like. Conventional plastic welding processes include ultrasonic welding, hot plate welding, vibration friction welding, and the like.

For example, chinese patent document CN108145980B discloses an automatic ultrasonic-hot rivet welding apparatus for plastic parts and a welding method thereof. The equipment comprises a welding tool and a welding machine. When the welding tool is used, the welding tool enters the welding machine through the roller on the upper surface of the die changing trolley, the lower template is fixed on the working platform, the middle template is fixed on the middle template fixing plate, and the upper template is fixed on the upper template fixing plate. After the welding machine is started, different cylinders respectively drive the middle template fixing plate and the upper template fixing plate to move downwards along a guide rail in the welding machine, the middle template and the upper template are driven to move downwards together, and when a pressure point on the middle template is contacted with and pressed by a plastic part, an ultrasonic welding head and a hot riveting welding head on the upper template start welding.

Although the automatic ultrasonic-hot rivet welding equipment for the plastic parts reduces the labor intensity of assembly workers, the ultrasonic welding mode is limited to some plastics with low melting points, and the connection strength of welding spots formed by welding is not high. At the same time, the apparatus is difficult to adapt to welding between plastic parts of larger dimensions. For example, in the case of plastic parts with dimensions exceeding 250mm by 250mm, the welding noise increases with the increase in the dimensions of the plastic parts during the ultrasonic welding process.

For another example, chinese patent document CN108357112A discloses a precision plastic welding apparatus. The equipment is used for welding and connecting the first plastic part to the second plastic part and comprises a hot melting device, a conveying device, a driving device and a fixing support. The hot melting device is provided with a first hot melting end in contact with the first plastic piece and a second hot melting end in contact with the second plastic piece. The conveying device picks up the first weldment. The driving device comprises a hot melting driver for driving the hot melting device. The hot melting driver comprises a connecting plate connected with the hot melting device, a sliding block which is arranged on the connecting plate and is provided with a through hole, a rotating shaft which is in switching fit with the through hole and a servo driver which drives the rotating shaft to rotate.

Although the above welding apparatus improves the strength of the connection between the plastic weld members by increasing the depth of the weld, the apparatus lacks a treatment for thermal stress generated in the weld. The thermal stress generated in the welding process is easy to cause the deformation of a plastic welding part, and the size precision of the plastic part after welding is difficult to ensure, so that the yield is reduced, and the difficulty of the whole vehicle assembly is increased.

In summary, how to design a welding device to improve the connection strength of the welded plastic parts and improve the dimensional accuracy in the welding process of the automotive interior plastic parts becomes a technical problem to be solved by those skilled in the art.

Disclosure of Invention

The invention aims to provide welding equipment for a welding process of an automotive interior plastic part, which is used for improving the connection strength of the welded plastic part and reducing the influence of thermal stress generated by welding on the design size of the plastic part, so that the size precision of the welded plastic part is improved, the welding efficiency of the plastic part is further improved, and the whole welding process of the plastic part is more silent, environment-friendly and energy-saving.

In order to achieve the purpose, the invention adopts the following scheme: the hot-melting welding equipment for the automobile central storage box comprises a support, a platform, a pressing mechanism, a welding device, a fixing device for positioning and clamping a plastic component and a turnover mechanism for assisting in feeding and discharging the plastic component;

the welding device comprises a support, a platform, a welding device and a fixing device, wherein the platform is fixedly arranged on the support, the platform is provided with a welding slide rail for the welding device to slide, the welding slide rail comprises a left side slide rail and a right side slide rail, and the fixing device is positioned between the left side slide rail and the right side slide rail;

the fixing device comprises a bottom plate and a positioning block for positioning the plastic component, the positioning block is fixedly arranged on the bottom plate, a clamping hole is formed in the positioning block, a clamp for clamping the plastic component is arranged in the clamping hole, the bottom plate is provided with a turning axis, and a connecting seat is arranged at the turning end of the bottom plate;

the turnover mechanism comprises a turnover base and a turnover power cylinder for driving the bottom plate to rotate around a turnover axis, wherein the fixed end of the turnover power cylinder is hinged with a fixed seat, the end of a piston rod of the turnover power cylinder is hinged with a connecting piece, the bottom of the fixed seat is fixedly arranged on the platform, the connecting piece is fixedly arranged on the bottom plate, a pair of turnover bases is fixedly arranged on the platform, a turnover shaft is arranged between the pair of turnover bases, and the turnover shaft is connected with the connecting seat;

the welding device comprises a hot rivet welding assembly, a first welding power cylinder and an installation plate, wherein the hot rivet welding assembly is fixedly installed on the installation plate, the bottom of the installation plate is connected with a welding slide rail through a welding slide seat, the first welding power cylinder is fixedly installed on the platform, and the piston rod end of the first welding power cylinder is connected with the installation plate;

the mechanism of pushing down is located the top of platform, the mechanism of pushing down includes the clamp plate, pushes down the slide rail and drives the clamp plate along pushing down the gliding power cylinder that pushes down of slide rail, push down slide rail fixed mounting on the platform, and the extending direction perpendicular to platform's of push down the guide rail terminal surface, the clamp plate links to each other with the push down guide rail through pushing down the slide, the tailpiece of the piston rod of the power cylinder that pushes down links to each other with the clamp plate, the bottom of clamp plate is provided with the pressure head.

Preferably, a welding port is formed in the platform and located between the left side sliding rail and the right side sliding rail, a hot rivet welding assembly is arranged in the welding port, the hot rivet welding assembly is fixedly mounted on the mounting plate, a second welding power cylinder is arranged at the bottom of the mounting plate, the support of the second welding power cylinder is fixedly mounted, the piston rod end of the second welding power cylinder is connected with the bottom of the mounting plate, a guide mechanism for guaranteeing the movement precision of the second welding power cylinder is arranged at the bottom of the platform, and a through hole through which the heat supply rivet welding assembly passes is formed in the bottom plate of the fixing device. So set up for hot melt welding equipment not only can carry out hot rivet welding to the welding point position on the left side and the right side of plastic component, can also carry out hot rivet welding at the welding point position of plastic component's bottom, further enlarged hot melt welding equipment's application range, to same section plastic component, add the welding point position of bottom, be favorable to further improving the joint strength of plastic component after the welding.

Preferably, the hot rivet welding assembly is a non-contact infrared plastic hot melting welding head. So set up, utilize non-contact infrared ray focus radiation to implement the heating to the riveting post on the plastic component, after the punching press formed the locking die, compressed air cooled locking die fast is favorable to reducing the thermal stress that the plastic component exists after the welding, has reduced plastic component's deformation, has further improved the yield.

Preferably, the overturning power cylinder is an oil cylinder or an air cylinder. Because the requirement on the movement precision of the turnover mechanism is low when the plastic component is placed, the turnover power cylinder is favorable for reducing the cost of equipment by selecting an oil cylinder or an air cylinder.

Preferably, the platform is provided with a surrounding barrier which is arranged along the outer side edge of the platform to form a processing area, the surrounding barrier is provided with an opening for the plastic component to enter and exit the processing area, and the opening is provided with a safety grating. So set up, when the hot melt welding equipment was in operation, if in the object got into the processing region through safe grating, equipment will promptly stop, has further improved the security performance of equipment.

Preferably, the platform is provided with a stand column, the stand column is provided with a first detection sensor for detecting the rotating position of the turnover mechanism, and the bottom plate of the fixing device is provided with a second detection sensor and a third detection sensor for detecting the appearance of the plastic component. So set up, detect tilting mechanism's position through first detection sensor, can in time judge whether the hot melt welding equipment is in operating condition, be favorable to reminding operating personnel in time material loading or unloading, be convenient for guarantee the continuity of hot melt welding processing, utilize the appearance border size that second detection sensor and third detection sensor detected plastic component, be favorable to on-line comparison before the hot melt welding size error between the plastic component after plastic component and the hot melt welding, the process of artifical reinspection has been reduced, hot melt welding's efficiency has further been improved.

Preferably, the turnover mechanism has a first station for placing the plastic component and a second station for welding the plastic component. And the pressing device is positioned at a first station, the downward-pressing power cylinder drives the pressing plate to be far away from the platform along the extending direction of the downward-pressing slide rail, the power cylinder is overturned to drive the bottom plate to rotate above the platform, and the downward-pressing power cylinder is positioned at a second station to drive the pressing plate to apply pressing force to the plastic component.

As preferred, the plastics subassembly includes interarea board, left side board and right side board, is provided with the riveting post on the lateral wall of interarea board, all be provided with on left side board and the right side board with rivet post assorted mounting hole, the front end of interarea board is provided with the reinforcing plate. So set up, optimized the split of spare part when the design, be favorable to the plastic component to match the hot melt welding equipment more.

The invention also provides a welding method using the hot melting welding equipment for the automobile central storage box, which comprises the following steps: the plastic component is arranged on a bottom plate of the fixing device, the clamp is clamped after the plastic component is positioned by the positioning block, the downward pressing power cylinder driving pressing plate is close to the platform along the extending direction of the downward pressing sliding rail, pressing force is applied to the plastic component through the pressing head, the first welding power cylinder driving mounting plate is close to the plastic component along the extending direction of the welding sliding rail, and the rivet welding head of the hot rivet welding component abuts against the plastic component to complete rivet welding operation.

Preferably, the rivet welding operation comprises: the rivet welding head of the hot rivet welding assembly compresses the plastic assembly, the rivet column is heated inside the hot rivet welding assembly through laser radiation, and the punch of the hot rivet welding assembly punches the rivet column to form the locking rivet head.

Compared with the prior art, the hot-melt welding equipment and the welding method for the automobile central storage box have the following prominent substantive characteristics and remarkable progress:

1. according to the hot-melt welding equipment for the automobile central storage box, the plastic component is respectively positioned and clamped by utilizing the positioning block and the clamp in the fixing device, the downward pressing power cylinder driving pressing plate applies downward pressure through the pressing head, and in the hot rivet welding process, the first welding power cylinder driving mounting plate applies pressing force to the plastic component through the hot rivet welding component, so that the connection strength of the plastic component after welding is favorably improved, the influence of the thermal stress generated by welding on the design size of the plastic component is greatly reduced, and the size precision of the plastic component after welding is improved;

2. this a set up tilting mechanism in hot melt welding equipment for car central authorities storing box, utilize upset power cylinder drive bottom plate to rotate around the trip axis, assist the material loading and the unloading of plastic components, during material loading and unloading, the platform is kept away from along the extending direction of pushing down the slide rail to the power cylinder drive clamp plate that pushes down, and upset power cylinder drive bottom plate rotates to the top of platform, and the operating personnel's of being convenient for operation has further improved the machining efficiency of plastic components in hot melt welding technology.

Drawings

FIG. 1 is a schematic perspective view of a thermal welding apparatus for an automobile central storage box according to an embodiment of the present invention;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a left side view of FIG. 1;

FIG. 4 is a cross-sectional view taken at A-A of FIG. 2;

FIG. 5 is a cross-sectional view taken at B-B of FIG. 2;

FIG. 6 is a cross-sectional view taken at C-C of FIG. 3;

FIG. 7 is a cross-sectional view taken at D-D in FIG. 3;

FIG. 8 is a perspective view of a plastic component;

FIG. 9 is an assembled schematic view of the plastic component;

fig. 10 is a schematic view of the hot rivet welding operation of the hot rivet welding assembly.

Reference numerals: the device comprises a support 1, a platform 2, a downward pressing mechanism 3, a welding device 4, a fixing device 5, a plastic component 6, a safety grating 7, a turnover mechanism 8, a first detection sensor 9, a second detection sensor 10, a third detection sensor 11, a pressing plate 31, a pressure head 32, a downward pressing slide rail 33, a hot rivet welding component 41, a mounting plate 42, a welding slide rail 43, a protective cover 44, a first welding power cylinder 45, a second welding power cylinder 46, a guide mechanism 47, a bottom plate 51, a positioning block 52, a clamp 53, a left side plate 61, a right side plate 62, a main panel 63, a reinforcing plate 64, a rivet column 65, a turnover power cylinder 81, a connecting piece 82, a fixed seat 83, a turnover base 84, a rivet welding head 411 and a punch 412.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings.

The hot melting welding equipment for the automobile central storage box, as shown in fig. 1-3, is used for improving the connection strength of the plastic components after welding and reducing the influence of the thermal stress generated by welding on the design size of the plastic components. The hot-melting welding equipment utilizes the positioning block and the clamp in the fixing device to position and clamp the plastic component respectively. The lower pressure is exerted through the pressure head to the power cylinder drive clamp plate that pushes down to at the in-process of hot rivet welding, the packing force is exerted to the plastics subassembly through hot rivet welding subassembly to first welding power cylinder drive mounting panel. The method is favorable for improving the connection strength of the plastic assembly after welding, greatly reduces the influence of thermal stress generated by welding on the design size of the plastic assembly, and improves the size precision of the plastic assembly after welding.

As shown in fig. 1 and fig. 2, a hot-melt welding device for an automobile central storage box comprises a support 1, a platform 2, a pressing mechanism 3, a welding device 4, a fixing device 5 for positioning and clamping a plastic component 6, and a turnover mechanism 8 for assisting in loading and unloading the plastic component 6.

As shown in fig. 4, the platform 2 is fixedly mounted on the support 1. The platform 2 is provided with a welding slide rail 43 for the welding device 4 to slide. The welding slide 43 includes a left side slide and a right side slide. The fixing device 5 is positioned between the left side slide rail and the right side slide rail. The manufacturing 1 can be processed by aluminum alloy section bars and is connected by fasteners to form a frame structure.

The fixing device 5 comprises a base plate 51 and a positioning block 52 which forms a positioning for the plastic component 6. The positioning block 52 is fixedly mounted on the base plate 51. The positioning block 52 is provided with a clamping hole. And a clamp 53 for clamping the plastic component 6 is arranged in the clamping hole. The base plate 51 has a flip axis. The turning end of the bottom plate 51 is provided with a connection seat.

As shown in fig. 5, the turnover mechanism 8 includes a turnover base 84 and a turnover power cylinder 81 for driving the base plate 51 to rotate about the turnover axis. The fixed end of the turning power cylinder 81 is hinged with a fixed seat 83. The piston rod end of the turning power cylinder 81 is hinged with a connecting piece 82. The bottom of the fixed seat 83 is fixedly installed on the platform 2. The connecting member 82 is fixedly mounted on the base plate 51. A pair of roll-over mounts 84 are fixedly mounted on the platform 2. A roll-over shaft is provided between the pair of roll-over bases 84. The turnover shaft is connected with the connecting seat.

Wherein the turning mechanism 8 has a first station for placing the plastic component 6 and a second station for welding the plastic component 6. In the first station, the downward-pressing power cylinder drives the pressing plate 31 to be far away from the platform 2 along the extending direction of the downward-pressing sliding rail 33, and the overturning power cylinder 81 drives the bottom plate 51 to rotate towards the upper part of the platform 2; at the second station, the pressing cylinder drives the pressing plate 31 to apply pressing force to the plastic component 6.

The tilt cylinder 81 may be selected as either a cylinder or a pneumatic cylinder. Because the requirement on the movement precision of the overturning mechanism 8 is low when the plastic component 6 is placed, the overturning power cylinder 81 adopts an oil cylinder or an air cylinder, which is beneficial to reducing the cost of equipment. The overturning power cylinder 81 can be preferably an air cylinder, can utilize the existing air source in a workshop as the power of the air cylinder, and is cleaner and more environment-friendly.

As shown in fig. 4 in conjunction with fig. 6, the welding device 4 includes a hot rivet welding assembly 41, a first welding power cylinder 45, and a mounting plate 42. The hot rivet welding assembly 41 is fixedly mounted on the mounting plate 42. The bottom of the mounting plate 42 is connected to a welding slide 43 by a welding slide. The first welding power cylinder 45 is fixedly mounted on the platform 2. The rod end of the first weld power cylinder 45 is connected to the mounting plate 42. A protective cover 44 is also arranged above the hot rivet welding assembly 41. The protective cover 44 is arranged for protecting the hot rivet welding assembly 41; and on the other hand, the welding device is used for reducing the influence of light and heat generated in the welding process on the outside.

As shown in fig. 6 in conjunction with fig. 7, the platform 2 is provided with a welding port. The welding port is located between the left side slide rail and the right side slide rail. A hot rivet welding assembly 41 is arranged in the welding opening. The hot rivet welding assembly 41 is fixedly mounted on the mounting plate 42. The bottom of the mounting plate 42 is provided with a second welding power cylinder 46. The second welding power cylinder 46 is fixedly mounted on the support 1. The rod end of the second weld power cylinder 46 is attached to the bottom of the mounting plate 42. The bottom of the platform 2 is provided with a guide mechanism 47 which ensures the movement accuracy of the second welding power cylinder 46. The bottom plate 51 of the fixing device 5 is provided with a through hole for the heat rivet welding assembly 41 to pass through.

So set up for hot melt welding equipment not only can carry out hot rivet welding to the welding point position on the left side and the right side of plastic component 6, can also carry out hot rivet welding at the welding point position of the bottom of plastic component 6, further enlarged hot melt welding equipment's application range, to same section plastic component 6, add the welding point position of bottom, be favorable to further improving the joint strength of plastic component 6 after the welding.

As shown in fig. 3, the hold-down mechanism 3 is located above the stage 2. The pressing mechanism 3 includes a pressing plate 31, a pressing rail 33, and a pressing cylinder that drives the pressing plate 31 to slide along the pressing rail 33. The downward-pressing slide rail 33 is fixedly installed on the platform 2, and the extending direction of the downward-pressing slide rail is perpendicular to the end surface of the platform 2. The press plate 31 is connected to the press rail through a press slider. The rod ends of the down-pressure power cylinders are connected to the pressure plate 31. The bottom of the platen 31 is provided with a ram 32.

The hot rivet welding assembly 41 may be a non-contact infrared plastic hot melt welding head. So set up, utilize non-contact infrared focusing radiation to implement the heating to the riveting post 65 on the plastic component 6, after the punching press formed the locking rivet, compressed air cooled locking rivet fast is favorable to reducing the thermal stress that plastic component 6 exists after the welding, has reduced plastic component 6's deformation, has further improved the yield.

As shown in fig. 1, a fence is provided on the platform 2. The enclosing barriers are arranged along the outer side edge of the platform 2 to form a processing area. The enclosure has an opening for the plastic component 6 to enter and exit the processing area. The opening is provided with a safety grating 7. So set up, when the hot melt welding equipment was in operation, if the object had passed through safety grating 7 and got into the processing region, equipment will promptly stop, has further improved the security performance of equipment.

As shown in fig. 1 and 2, the platform 2 is provided with a column. The upright post is provided with a first detection sensor 9 for detecting the rotation position of the turnover mechanism 8. The bottom plate 51 of the fixture 5 is provided with a second detection sensor 10 and a third detection sensor 11 that detect the outer shape of the plastic component 6. So set up, detect tilting mechanism 8's position through first detection sensor 9, can in time judge whether the hot melt welding equipment is in operating condition, be favorable to reminding timely material loading of operating personnel or unloading, be convenient for guarantee the continuity of hot melt welding processing. The appearance edge size of the plastic component 6 is detected by the second detection sensor 10 and the third detection sensor 11, so that the size error between the plastic component 6 before hot-melt welding and the plastic component 6 after hot-melt welding can be compared on line, the manual re-inspection process is reduced, and the hot-melt welding efficiency is further improved.

The first detecting sensor 9, the second detecting sensor 10 and the third detecting sensor 11 can be laser sensors. The first welding power cylinder 45, the second welding power cylinder 46 and the pressing power cylinder can be electric cylinders to improve the position accuracy of the actuating mechanism. The first welding power cylinder 45, the second welding power cylinder 46 and the pressing power cylinder can also be air cylinders or oil cylinders according to actual requirements.

As shown in fig. 8 in conjunction with fig. 9, the plastic component 6 includes a main panel 63, a left side panel 61, and a right side panel 62. The main panel 63 is provided with a rivet 65 on a side wall thereof. And mounting holes matched with the riveting columns 65 are formed in the left side plate 61 and the right side plate 62. The front end of the main panel 63 is provided with a reinforcing plate 64. So set up, optimized the split of spare part when the design, be favorable to plastic component 6 to match the hot melt welding equipment more.

The embodiment of the invention also provides a welding method using the hot melting welding equipment for the automobile central storage box, which comprises the following steps: after the plastic component 6 is mounted on the bottom plate 51 of the fixing device 5, the positioning block 52 is used to position the plastic component 6, the clamp 53 clamps the plastic component, the lower power cylinder drives the pressing plate 31 to approach the platform 2 along the extending direction of the lower slide rail 33, and the pressing head 32 applies pressing force to the plastic component 6, the first welding power cylinder 45 drives the mounting plate 42 to approach the plastic component 6 along the extending direction of the welding slide rail 43, and the rivet head 411 of the hot rivet welding component 41 abuts against the plastic component 6 to complete the rivet welding operation.

Wherein, rivet welding operation includes: the rivet head 411 of the hot rivet welding assembly 41 compresses the plastic assembly 6, the rivet column 65 is heated by laser radiation inside the hot rivet welding assembly 41, and the punch 412 of the hot rivet welding assembly 41 punches the rivet column 65 to form a locking rivet head.

As shown in fig. 10, a rivet 65 of the main panel 63 is inserted into the mounting hole of the left side plate 61. The ram 32 and the rivet head 411 of the hot rivet assembly 41 both apply an axial force to the plastic assembly 5, creating a further grip on the plastic assembly 6. The influence of thermal stress generated by welding on the design size of the plastic component 6 is reduced, and the size precision of the plastic component 6 after welding is improved. The hot tack welding assembly 41 may optionally heat the rivet stem 65 with focused infrared radiation. After heating for a period of time, the punch 412 in the hot rivet welding assembly 41 is driven by the pneumatic structure to punch the rivet stem 65 to form a locking rivet head. Meanwhile, compressed air is introduced into the hot rivet welding assembly 41 to cool and shape the locking rivet head. The influence of thermal stress on the design size of the plastic component 6 is further reduced, and the connection strength between parts in the plastic component 6 is greatly improved.

The present invention is not limited to the specific technical solutions described in the above embodiments, and other embodiments may be made in the present invention in addition to the above embodiments. It will be understood by those skilled in the art that various changes, substitutions of equivalents, and alterations can be made without departing from the spirit and scope of the invention.