Cab roof cross member hydro-forming apparatus

Abstract

This invention discloses a hydraulic forming device for a cab roof crossbeam, belonging to the field of hydraulic forming technology. It aims to solve the technical problem that due to the complex structure and numerous curvatures of the crossbeam, it is difficult to completely drain the forming fluid at low water levels. The device includes a fixed mold assembly and a moving mold assembly. The fixed mold assembly includes a base, with a fixed template installed in the inner cavity of the base. The top of the fixed template has a mold closing groove, a pressure groove, and a cavity. The moving mold assembly includes a lifting seat, with a moving template installed at its bottom. The bottom of the moving template has a mold closing plate, a pressure plate, and a forming fluid cavity. A punching assembly is arranged inside the moving template, including a lifting platform above the moving template and a draining rack inside the forming fluid cavity. The bottom of the lifting platform is connected to multiple round-hole punches and multiple square-hole punches, and the draining rack has a drainage channel inside its cavity. This invention not only achieves complete drainage of the forming fluid but also provides the advantage of continuous punching processing of the crossbeam.

Description

Technical Field

[0001] This invention relates to the field of hydraulic forming technology, and more specifically, to a hydraulic forming device for a cab roof beam. Background Technology

[0002] Hydraulic forming, also known as fluid forming, is an advanced plastic forming technology that uses high-pressure liquid as the force transmission medium to replace the traditional rigid punch or die. This causes metal sheets or tubes to undergo plastic deformation under pressure, ultimately fitting into the mold cavity to produce precision parts of the desired shape.

[0003] The crossbeam of the vehicle cab roof is a core load-bearing component of the vehicle body roof, playing a crucial role in supporting the roof, transmitting torsional forces to the vehicle body, and improving the torsional rigidity and collision resistance of the cab; as shown in the attached diagram in the instruction manual. Figure 1 The diagram shows a crossbeam structure, which is a crossbeam structure for the roof of a car cab. It is made of a high-strength steel plate structure formed by one-piece stamping. In the horizontal direction, it has an arc transition along the width of the car body to match the curved shape of the cab roof. In the vertical direction, it has an arc arch along the height of the car body, forming an arch-like stress structure that can effectively distribute the top load. The top is arranged with multiple protruding structures, and the protruding structures have round or square holes. The round holes are used for bolt fixing and are suitable for accessories with round mounting holes such as dome lights and wiring harness mounting brackets. The square holes are used for snap-fit ​​or bolt fixing and are suitable for accessories with long and narrow mounting positions such as sunroof rails and decorative strips. The two sides of the crossbeam are provided with flanged structures for welding and fixing to the inner panel of the cab roof and the side reinforcement plate, improving the overall connection between the crossbeam and the car body.

[0004] During the hydroforming process of this crossbeam, due to its complex structure, numerous curvatures, and localized low-lying areas, traditional drain ports are often located in the fixed mold cavity or conventional positions on the moving mold. This makes it difficult to accommodate residual fluid at low levels on the complex curved surface. The forming fluid at these low levels cannot be completely drained, leading to workpiece surface contamination, affecting subsequent punching accuracy, and even causing cavity corrosion and shortening mold life. Furthermore, after hydroforming, the workpiece must be removed and transported to a punching machine for secondary clamping and positioning to punch the round and square holes on its top protrusions. This results in fragmented processes, time-consuming workflows, significantly reduced production efficiency, and increased manufacturing costs. Therefore, we propose a hydroforming device for the cab roof crossbeam. Summary of the Invention

[0005] The purpose of this invention is to provide a hydraulic forming device for the cab roof crossbeam, so as to solve the technical problem that the forming fluid at low water levels is difficult to completely drain due to the complex structure and multiple curvatures of the crossbeam.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a hydraulic forming device for a cab roof crossbeam, comprising a fixed mold assembly, and a movable mold assembly capable of being raised and lowered arranged above the fixed mold assembly; the fixed mold assembly includes a base, a fixed template is installed in the inner cavity of the base, and the top of the fixed template is provided with a mold closing groove, a pressure groove and a cavity; the movable mold assembly includes a lifting seat, a movable template is installed at the bottom of the lifting seat, and a mold closing plate, a pressure plate and a forming liquid cavity are arranged at the bottom of the movable template; wherein, a punching assembly is arranged in the inner cavity of the movable template; the punching assembly includes a lifting platform arranged above the movable template and a draining rack arranged in the forming liquid cavity; the bottom of the lifting platform is connected to The device has multiple round hole punches and multiple square hole punches, all of which are movably inserted into the drain rack. The drain rack has a drainage channel inside, with the inlet of the channel located at the bottom. The drain rack can drain the forming liquid from the forming liquid cavity through the drainage channel. The lifting platform can first perform a low-speed downward movement and then a high-speed downward punching movement. During the low-speed downward movement, the lifting platform can drive the drain rack to press down on the top of the crossbeam, draining the forming liquid from the top of the crossbeam and positioning the crossbeam. Subsequently, the high-speed downward punching movement of the lifting platform drives the round hole punches and square hole punches to punch holes in the top of the crossbeam.

[0007] Preferably, the cavity includes multiple punches 1 and multiple punches 2. Punch 1 has a circular cavity from top to bottom, and punches 2 have a square cavity from top to bottom. The inner cavity of the fixed template is also equipped with a cylinder-driven lifting plate. The top of the lifting plate is connected to a top plate, and the top of the top plate is connected to multiple dome molds and multiple square dome molds. When the lifting plate rises, the dome molds can form an insertion fit with the circular cavity, and the square dome molds can form an insertion fit with the square cavity, so as to form a crossbeam outline structure at the top of the cavity. When the lifting plate descends, the dome molds disengage from the circular cavity, and the square dome molds disengage from the square cavity, so as to provide clearance space for the circular and square punches to punch holes in the top of the crossbeam.

[0008] Preferably, the flushing assembly further includes a frame installed on the top of the moving template, a telescopic cylinder is installed on the top of the frame, and the frame and the moving template are connected by multiple guide columns; the lifting platform is slidably arranged on the guide columns, and the output end of the telescopic cylinder is connected to the top of the lifting platform.

[0009] Preferably, the inner cavity of the moving template is further provided with an inlet cavity and an outlet cavity that communicate with the forming liquid cavity; the inlet of the inlet cavity is connected to the inlet valve body through a first pipe, and the inlet of the inlet valve body is connected to an external liquid filling system; the outlet of the outlet cavity is connected to the outlet valve body through a second pipe, and the outlet of the outlet valve body is connected to an external liquid drainage system.

[0010] Preferably, the top of the drain rack is integrally formed with multiple sliding cylinders, the inner cavity of the sliding cylinders forms the drainage channel, and the top of the sliding cylinders is provided with a notch; one of the sliding cylinders is slidably disposed in the liquid inlet chamber, and the drainage channel is connected to the liquid inlet chamber through the notch; another sliding cylinder is slidably disposed in the drain chamber, and the drainage channel is connected to the drain chamber through the notch.

[0011] Preferably, the round hole punch is a cylindrical rod structure. The round hole punch slides through the inner cavity of the moving template and extends into the drainage channel of the slide cylinder, with a clearance fit between the round hole punch and the inner wall of the drainage channel. A sealing groove, a spring groove, and a movable groove are also provided at the top of the forming liquid cavity. The sealing groove communicates with the movable groove through the spring groove. The top protrusion of the drain rack can form a sealed insertion state with the sealing groove. A square groove is also provided at the bottom of the drain rack. The square hole punch is movably arranged in the square groove. When the square hole punch moves up, it can drive the drain rack to rise through the square groove, and the top of the square hole punch forms a sealed fit with the inner wall of the square groove. The top of the square hole punch is connected to the bottom of the lifting platform through a connecting rod. The connecting rod movably passes through the square groove of the drain rack. A spring is arranged on the outer circumference of the connecting rod. One end of the spring is connected to the bottom of the lifting platform, and the other end is connected to the top of the drain rack. The spring is also spaced within the spring groove.

[0012] Preferably, the bottom of the drainage channel is a square groove structure, which is used to form a plug-in fit with the protruding structure on the top of the crossbeam, and the bottom of the drainage channel is also connected to an inclined channel, the entrance of the inclined channel being the lowest point of the drain rack.

[0013] Preferably, the cavity has multiple vent holes from top to bottom, which are used to expel air during the process of the high-pressure forming fluid pushing the crossbeam blank to fit against the inner wall of the cavity; the side wall of the fixed template has a waste outlet, the inner wall of the waste outlet has an inclined surface structure, the top of the top plate has an inclined surface structure, and the inclination angle of the top of the top plate is consistent with the inclination angle of the inner wall of the waste outlet.

[0014] Preferably, the inner sidewall of the fixed template has multiple slots and multiple control slots, which are connected. A blocking block is movably inserted into each slot. The sidewall of the blocking block is connected to a limiting plate via a sliding post. The limiting plate is movably arranged in the control slot. The sidewall of the limiting plate is connected to the inner wall of the control slot via a spring. The end of the blocking block has a double-sloped pointed structure. A convex plate is connected to the sidewall of the top plate. The end of the convex plate has a double-sloped pointed structure. The slope of the end of the convex plate can form a squeezing and sliding state with the slope of the end of the blocking block. Multiple inserts are connected to the top of the lifting plate. Limiting sliders are connected to the sidewalls of the inserts. Multiple cylinders are connected to the bottom of the top plate. The sidewalls of the cylinders have sliding grooves. The inserts are movably inserted into the inner cavity of the cylinders. The limiting sliders are movably arranged in the sliding grooves. A spring is sleeved on the outer circumference of the cylinder. One end of the spring is connected to the top of the lifting plate, and the other end is connected to the bottom of the top plate.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention, through the design of a fixed mold assembly, a moving mold assembly, and a venting assembly, allows for the following process: After the outline of the crossbeam is formed by the fixed mold assembly and the moving mold assembly, when a liquid draining operation is required, the lifting platform of the venting assembly moves downward at a low speed. This causes the draining frame to press down on the top of the crossbeam. During this process, the draining frame drains the forming liquid from the forming liquid cavity through a drainage channel. Since the inlet of the drainage channel is located at the bottom of the draining frame, as the draining frame moves downward, any residual forming liquid between the crossbeam and the forming liquid cavity can be completely drained, preventing residual forming liquid from affecting subsequent processes. During processing, the drain rack presses down on the top of the crossbeam to position it. Then, the lifting platform performs a high-speed downward punching motion, driving the round hole punch and square hole punch to punch holes in the top of the crossbeam. This not only achieves the effect of completely draining the forming liquid, but also enables continuous punching of the crossbeam. It solves the problems of complex crossbeam structure, many curvatures, inconvenient design of drain outlet in the cavity of the fixed mold, difficulty in completely draining forming liquid at low water levels due to design on the moving mold, and low efficiency of secondary positioning and punching after the workpiece is removed.

[0016] 2. This invention designs a drainage component. In this structure, as the lifting platform slowly descends, a spring on the connecting rod pushes the drainage frame to descend synchronously. During the descent, the drainage channel can drain liquid until the bottom of the drainage frame is in contact with the top of the crossbeam. The drainage channel can then smoothly empty the forming liquid in the forming liquid cavity. Furthermore, the round hole punch has a clearance fit with the inner wall of the drainage channel, which neither obstructs the flow of forming liquid nor hinders subsequent punching. After drainage is complete and the drainage frame is positioned on the crossbeam, the lifting platform continues to descend at high speed, overcoming the elasticity of the spring to drive the square hole punch... The head extends from the square slot of the drain rack, while the round hole punch extends from the drainage channel. The two work together to punch the round and square holes on the top of the crossbeam. The structure achieves flexible control of the drain rack's descent through the elastic force of spring one. When the lifting platform moves down at high speed, it overcomes the elastic force of spring one to drive the square hole punch and the round hole punch to perform the punching operation. This allows the draining of forming liquid, automatic positioning of the formed workpiece, and punching operation to be completed sequentially on a single device. It realizes the integration and automation of the entire process from sheet metal hydroforming to final punching.

[0017] 3. This invention also features an inclined channel at the bottom of the drainage channel, with the inlet located at the lowest point of the drain rack. The bottom of the drainage channel is designed as a square trough structure that matches the protruding structure at the top of the crossbeam. When the bottom of the drain rack is in contact with the top of the crossbeam, and the square trough structure at the bottom of the drainage channel is plugged into the protruding structure at the top of the crossbeam, the inclined channel ensures that the drainage channel and the forming liquid cavity remain connected. At the same time, by utilizing the structural design that the inlet is located at the lowest point of the drain rack, the forming liquid at the lowest water level in the forming liquid cavity can be completely drained. That is, the last small amount of residual forming liquid accumulated at the lowest depression between the bottom of the drain rack and the complex curved surface at the top of the crossbeam is drawn in through the inlet at this lowest point and smoothly discharged through the inclined channel and the main body of the drainage channel. This solves the problem that due to the complex structure and multiple curvatures of the crossbeam, the lowest depression where it is in contact with the drain rack during drainage is prone to residual forming liquid that cannot be completely discharged.

[0018] 4. This invention designs the top plate with an inclined surface structure. After the hydraulic forming operation of the crossbeam is completed and the forming fluid is drained through the punching assembly, just before the punching operation, the lifting plate is controlled by a cylinder to lower the top plate, causing the dome mold to detach from the round hole cavity and the square top mold to detach from the square hole cavity, providing clearance space for punching. The waste generated by punching can slide down the inclined surface of the top plate to the waste port on the side wall of the fixed template. Because the inclination angle of the top plate is consistent with the inclination angle of the inner wall of the waste port, the waste can slide smoothly out of the equipment, realizing automatic collection and discharge of waste, and avoiding the accumulation of waste in the cavity, which affects subsequent forming and punching processing.

[0019] 5. This invention also incorporates a protruding plate and a blocking block. After the punching operation is completed and the waste material generated by punching slides down the inclined surface of the top plate to the waste outlet on the side wall of the fixed template for discharge, the top plate needs to rise and reset again. This maintains the dome mold and the round cavity in an interlocking fit, and the square top mold and the square cavity in an interlocking fit, forming a beam-shaped outline structure at the top of the cavity. This provides a complete cavity structure for the next forming process. When the top plate rises with the cylinder-driven lifting plate, the double-sloped tips of the protruding plate on its side wall will press and slide against the double-sloped tips of the blocking block in the slot on the side wall of the fixed template, pushing the blocking block back into the control groove and compressing the second spring. During this process, the lifting plate continues to rise, while the top plate remains stable due to the pressure between the protruding plate and the blocking block. During a brief pause in the upward motion, spring three is rapidly compressed. The moment the convex plate pushes open the blocking block, the pause in the upward motion of the top plate fails, and the compressed spring three quickly releases its elasticity, propelling the top plate upward rapidly until the convex plate makes squeezing contact with the next blocking block. During this process, the rapid rise and sudden stop of the top plate will generate a high-frequency impact vibration effect, which will shake off any residual or stuck punching waste material on the top of the top plate, ensuring that the waste material slides smoothly to the waste outlet for discharge. This solves the problem that punching waste material is easily stuck or stuck on the top of the top plate due to the influence of the dome mold and square mold structure on the top of the top plate, and cannot slide smoothly to the waste outlet for discharge, thus causing the dome mold and square mold to be unable to reset and maintain the integrity of the cavity structure. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a beam structure according to the present invention; Figure 2 This is a schematic diagram of the hydraulic forming equipment of the present invention; Figure 3 This is a schematic diagram of the moving template structure of the present invention; Figure 4 This is a schematic diagram of the cross-sectional structure of the lifting seat of the present invention; Figure 5 This is a schematic diagram of the moving template cutting structure of the present invention; Figure 6 This is a schematic diagram of the structure of each groove in the inner cavity of the moving template of the present invention; Figure 7 This is a cross-sectional structural diagram of the flushing assembly of the present invention; Figure 8 This is a schematic diagram of the disassembled structure of the base and fixed template of the present invention; Figure 9 This is a schematic diagram of the top structure of the fixed template of the present invention; Figure 10 This is a schematic diagram of a cross-sectional structure of the template of the present invention; Figure 11 This is a schematic diagram of another cross-sectional structure of the template of the present invention; Figure 12This is a schematic diagram of the convex plate and blocking block structure of the present invention; Figure 13 This is a schematic diagram of the disassembled structure of the lifting plate and the top plate of the present invention; Figure 14 This is a schematic diagram of a usage state structure of the present invention; Figure 15 This is a schematic diagram of another usage state of the present invention.

[0021] Explanation of the labels in the diagram: 1. Crossbeam; 2. Fixed mold assembly; 3. Moving mold assembly; 21. Base; 22. Fixed template; 2201. Mold closing groove; 2202. Pressure groove; 2203. Cavity; 2204. Punch 1; 2205. Punch 2; 2206. Round cavity; 2207. Square cavity; 2208. Lifting plate; 2209. Top plate; 22091. Thrust plate; 2210. Dome mold; 2211. Square dome mold; 2212. Vent hole; 2213. Scrap outlet; 2214. Slot; 2215. Control groove; 2216. Block; 2217. Sliding column; 2218. Limiting plate; 2219. Spring 2; 2220. Insert post; 2221. Limiting slider; 2222. Insert cylinder; 2223. Slide groove; 2224. Spring 3; 31. Lifting seat; 32. Moving template; 33. Punch discharge assembly; 3201. Forming template; 3202. Pressure plate; 3203. Forming liquid cavity; 3204. Liquid inlet cavity; 3205. Liquid outlet cavity; 3206. Pipeline 1; 3207. Liquid inlet valve body; 3208. Pipeline 2; 3209. Liquid outlet valve body; 3210. Sealing groove; 3211. Spring groove; 3212. Movable groove; 3301. Lifting platform; 3302. Round hole punch; 3303. Square hole punch; 3304. Liquid outlet rack; 3305. Drainage channel; 33051. Inclined channel; 3306. Frame; 3307. Telescopic cylinder; 3308. Guide column; 3309. Slide cylinder; 3310. Notch; 3311. Connecting rod; 3312. Spring 1. Detailed Implementation

[0022] like Figures 1 to 15As shown, the present invention relates to a hydraulic forming equipment for a cab roof crossbeam, comprising a press body, the press body including a fixed mold assembly 2, and a movable mold assembly 3 that can be raised and lowered arranged above the fixed mold assembly 2, the raising and lowering of the movable mold assembly 3 being controlled by a cylinder arranged above it; the fixed mold assembly 2 includes a base 21, a fixed template 22 installed in the inner cavity of the base 21, and the top of the fixed template 22 having a mold closing groove 2201, a pressure groove 2202 and a cavity 2203, the cavity 2203 being used to form the structure of the crossbeam body 1; the movable mold assembly 3 includes The lifting seat 31 has a movable template 32 installed at its bottom. The bottom of the movable template 32 is provided with a closing template 3201, a pressure plate 3202, and a forming liquid cavity 3203. When the movable template 32 descends to a closed state with the fixed template 22, the closing template 3201 and the mold closing groove 2201 form a combined and sealed state. The pressure plate 3202 and the pressure groove 2202 clamp and fix the crossbeam blank. Then, high-pressure forming liquid is injected into the forming liquid cavity 3203. The high-pressure forming liquid pushes the crossbeam blank to fit against the inner wall of the cavity 2203, forming the outline of the crossbeam body 1.

[0023] The moving template 32 has a punching assembly 33 inside its cavity. The punching assembly 33 includes a lifting platform 3301 above the moving template 32 and a draining rack 3304 inside the forming liquid cavity 3203. The bottom of the lifting platform 3301 is connected to a plurality of round hole punches 3302 and a plurality of square hole punches 3303. The round hole punches 3302 and the square hole punches 3303 are movably inserted into the draining rack 3304. The draining rack 3304 has a drainage channel 3305 inside its cavity. The entrance of the drainage channel 3305 is located at the bottom of the draining rack 3304. The draining rack 3304 can drain the forming liquid inside the forming liquid cavity 3203 through the drainage channel 3305.

[0024] After the beam body 1 is formed, the lifting platform 3301 can first move downward at low speed and then move downward at high speed. When the lifting platform 3301 moves downward at low speed, it can drive the drain rack 3304 to press down on the top of the beam body 1, discharge the forming liquid on the top of the beam body 1, and position the beam body 1. Then, the lifting platform 3301 moves downward at high speed, driving the round hole punch 3302 and the square hole punch 3303 to punch holes on the top of the beam body 1.

[0025] This invention, through the design of a fixed mold assembly 2, a moving mold assembly 3, and a punching assembly 33, allows for the hydraulic forming of the beam body 1. The beam blank is simply placed in the pressure groove 2202, and then the moving mold plate 32 descends to a closed state with the fixed mold plate 22, creating a sealed connection between the closed mold plate 3201 and the mold groove 2201. The pressure plate 3202 and the pressure groove 2202 clamp and fix the beam blank. High-pressure forming fluid is injected into the forming liquid cavity 3203, pushing the beam blank against the inner wall of the cavity 2203 to form the outline of the beam body 1. After forming the beam body 1, the lifting platform 3301 of the punching assembly 33 moves downwards at a low speed, causing the drain rack 3304 to press down on the top of the beam body 1. During this process, the drain rack 3304 drains the forming fluid from the forming liquid cavity 3203 through the drainage channel 3305. The inlet of channel 3305 is located at the bottom of the drain rack 3304. Therefore, as the drain rack 3304 moves downward, the residual forming liquid between the crossbeam 1 and the forming liquid cavity 3203 can be completely discharged, avoiding the residual forming liquid from affecting subsequent processing. At the same time, after the drain rack 3304 presses down on the top of the crossbeam 1, it positions the crossbeam 1. Then, the lifting platform 3301 performs a high-speed downward punching motion, driving the round hole punch 3302 and the square hole punch 3303 to punch the top of the crossbeam 1. This not only achieves the effect of completely draining the forming liquid, but also enables continuous punching processing of the crossbeam 1. It solves the problems that the complex structure and multiple curvatures of the crossbeam 1 make it inconvenient to design the drain outlet in the cavity 2203 of the fixed mold plate 22. Designing it on the moving mold makes it easy for the forming liquid at low water levels to be difficult to completely drain, and the low efficiency of secondary positioning and punching after the workpiece is removed.

[0026] In an embodiment of the present invention, the cavity 2203 includes a plurality of first punches 2204 and a plurality of second punches 2205. The first punches 2204 have a circular cavity 2206 formed from top to bottom, and the second punches 2205 have a square cavity 2207 formed from top to bottom. The inner cavity of the fixed template 22 is also equipped with a cylinder-driven lifting plate 2208. A top plate 2209 is connected to the top of the lifting plate 2208, and a plurality of dome molds 2210 and a plurality of square dome molds 2211 are connected to the top of the top plate 2209. When the lifting plate 2208... After the lifting plate 2208 rises, the dome mold 2210 can form an insertion fit with the round cavity 2206, and the square top mold 2211 can form an insertion fit with the square cavity 2207, which is used to form the outline structure of the crossbeam body 1 on the top of the cavity 2203; when the lifting plate 2208 descends, the dome mold 2210 disengages from the round cavity 2206, and the square top mold 2211 disengages from the square cavity 2207, which is used to provide clearance space for the round hole punch 3302 and the square hole punch 3303 to punch holes on the top of the crossbeam body 1.

[0027] In an embodiment of the present invention, the flushing assembly 33 further includes a frame 3306 installed on the top of the moving template 32. A telescopic cylinder 3307 is installed on the top of the frame 3306. The frame 3306 and the moving template 32 are also connected by a plurality of guide columns 3308. The lifting platform 3301 is slidably arranged on the guide columns 3308, and the output end of the telescopic cylinder 3307 is connected to the top of the lifting platform 3301.

[0028] By first moving the telescopic cylinder 3307 downward at low speed and then downward at high speed, the lifting platform 3301 can be driven to move downward at low speed on the guide column 3308 and then downward at high speed. This allows the drain rack 3304 to be driven to press down at low speed to the top of the crossbeam 1 to complete the draining of the forming liquid and the positioning of the workpiece. Then, the round hole punch 3302 and the square hole punch 3303 are driven to downward at high speed to complete the punching of the crossbeam 1, thus realizing the continuous action of draining, positioning and punching.

[0029] In an embodiment of the present invention, the inner cavity of the moving template 32 is further provided with an inlet chamber 3204 and a outlet chamber 3205 that communicate with the forming liquid chamber 3203; the inlet of the inlet chamber 3204 is connected to the inlet valve body 3207 through a first pipe 3206, and the inlet of the inlet valve body 3207 is connected to an external liquid filling system; the outlet of the outlet chamber 3205 is connected to the outlet valve body 3209 through a second pipe 3208, and the outlet of the outlet valve body 3209 is connected to an external liquid drainage system. The inlet valve body 3207 and the outlet valve body 3209 are both existing solenoid valve structures in the example, and the opening and closing timing of the valve body can be precisely controlled by electrical control.

[0030] Furthermore, the top of the drain rack 3304 is integrally formed with multiple sliding cylinders 3309, the inner cavity of the sliding cylinder 3309 forms a drainage channel 3305, and the top of the sliding cylinder 3309 is provided with a notch 3310; one of the sliding cylinders 3309 is slidably disposed in the liquid inlet cavity 3204, and the drainage channel 3305 is connected to the liquid inlet cavity 3204 through the notch 3310; another sliding cylinder 3309 is slidably disposed in the drain cavity 3205, and the drainage channel 3305 is connected to the drain cavity 3205 through the notch 3310.

[0031] When high-pressure forming fluid needs to be injected into the forming fluid chamber 3203, the inlet valve 3207 opens, and the forming fluid from the external filling system is transported to the forming fluid chamber 3203 through pipe 1 3206, inlet chamber 3204 and drainage channel 3305, providing high-pressure power for the hydraulic forming of the beam blank. When the forming is completed and the fluid needs to be drained, the outlet valve 3209 opens, and the forming fluid in the forming fluid chamber 3203 is drained to the external drainage system through drainage channel 3305, drainage chamber 3205 and pipe 2 3208. The inlet and outlet valves are independently controlled, realizing precise opening and closing of the fluid circuit during the hydraulic forming process.

[0032] In an embodiment of the present invention, the round hole punch 3302 is a cylindrical rod structure. The round hole punch 3302 slides through the inner cavity of the movable template 32 and extends into the drainage channel 3305 of the slide cylinder 3309. The round hole punch 3302 is clearance-fitted with the inner wall of the drainage channel 3305 to avoid affecting the flow of the forming liquid in the drainage channel 3305. The top of the forming liquid cavity 3203 is also provided with a sealing groove 3210, a spring groove 3211, and a movable groove 3212. The sealing groove 3210 is connected to the movable groove 3212 through the spring groove 3211. The protruding structure on the top of the drain rack 3304 can form a sealed insertion state with the sealing groove 3210 to ensure the sealing of the forming liquid cavity 3203. The drain rack 3304 has a square groove at its bottom, and a square hole punch 3303 is movably arranged in the square groove. When the square hole punch 3303 moves upward, it can drive the drain rack 3304 to rise through the square groove, and the top of the square hole punch 3303 forms a sealed fit with the inner wall of the square groove. The top of the square hole punch 3303 is connected to the bottom of the lifting platform 3301 through a connecting rod 3311. The connecting rod 3311 moves through the square groove of the drain rack 3304. A spring 3312 is arranged on the outer circumference of the connecting rod 3311. One end of the spring 3312 is connected to the bottom of the lifting platform 3301 and the other end is connected to the top of the drain rack 3304. The spring 3312 is also spaced in the spring groove 3211.

[0033] This invention utilizes a punching assembly 33. In this structure, as the lifting platform 3301 slowly descends, the spring 3312 on the connecting rod 3311 pushes the draining frame 3304 to descend synchronously. During the descent, the drainage channel 3305 can drain liquid until the bottom of the draining frame 3304 is in contact with the top of the crossbeam 1. The drainage channel 3305 can then smoothly drain the forming liquid from the forming liquid cavity 3203. Furthermore, the round punch 3302 and the inner wall of the drainage channel 3305 are fitted with a clearance, which neither obstructs the flow of the forming liquid nor hinders subsequent punching. After the draining is complete and the draining frame 3304 positions the crossbeam 1, the lifting platform 3301 continues to descend at high speed, overcoming the spring 3312's resistance. The force drives the square hole punch 3303 to extend from the square slot of the drain rack 3304, while the round hole punch 3302 extends from the drainage channel 3305. The two punches simultaneously complete the punching operation of the round hole and the square hole on the top of the crossbeam 1. The structure achieves flexible control of the descent of the drain rack 3304 through the elastic force of the spring 3312. When the lifting platform 3301 moves down at high speed, it overcomes the elastic force of the spring 3312 to drive the square hole punch 3303 and the round hole punch 3302 to perform the punching operation. This realizes that the forming liquid is drained, the forming workpiece is automatically positioned, and the punching operation is completed sequentially on a single device. It realizes the integration and automation of the whole process from sheet metal hydroforming to final punching.

[0034] In an embodiment of the present invention, the bottom of the drainage channel 3305 is a square groove structure, which is used to form a plug-in fit with the protruding structure on the top of the crossbeam 1, and the bottom of the drainage channel 3305 is also connected to an inclined channel 33051, the inlet of the inclined channel 33051 being the lowest point of the drain rack 3304.

[0035] The present invention also features an inclined channel 33051 at the bottom of the drainage channel 3305, with its inlet located at the lowest point of the drain rack 3304. The bottom of the drainage channel 3305 is designed as a square groove structure that matches the protruding structure at the top of the crossbeam 1. When the bottom of the drain rack 3304 is in contact with the top of the crossbeam 1, and the square groove structure at the bottom of the drainage channel 3305 is inserted into the protruding structure at the top of the crossbeam 1, the inclined channel 33051 ensures that the drainage channel 3305 and the forming liquid cavity 3203 remain in constant communication. Simultaneously, it utilizes its… The structural design of the inlet being located at the lowest point of the drain rack 3304 can completely drain the molding liquid at the lowest water level in the molding liquid chamber 3203. That is, the last small amount of residual molding liquid accumulated at the lowest depression between the bottom of the drain rack 3304 and the top of the crossbeam 1 is drawn in through the inlet at this lowest point and smoothly discharged through the main body of the inclined channel 33051 and the drainage channel 3305. This solves the problem that the lowest depression where the crossbeam 1 is in contact with the drain rack 3304 is prone to residual molding liquid that cannot be completely discharged during the draining process due to the complex structure and multiple curvatures of the crossbeam 1.

[0036] In an embodiment of the present invention, the cavity 2203 is provided with a plurality of vent holes 2212 from top to bottom. The vent holes 2212 are used to expel air during the process of the high-pressure forming fluid pushing the crossbeam blank to fit the inner wall of the cavity 2203.

[0037] In an embodiment of the present invention, a waste outlet 2213 is provided on the side wall of the template 22. The inner wall of the waste outlet 2213 is an inclined surface structure, and the top of the top plate 2209 is an inclined surface structure. The inclination angle of the top of the top plate 2209 is consistent with the inclination angle of the inner wall of the waste outlet 2213.

[0038] This invention designs the top of the top plate 2209 as an inclined surface structure. When the hydraulic forming operation of the crossbeam 1 is completed and the forming liquid is drained by the punching assembly 33, just before the punching operation, the lifting plate 2208 is controlled by the cylinder to drive the top plate 2209 to descend, so that the dome mold 2210 is disengaged from the round hole cavity 2206 and the square top mold 2211 is disengaged from the square hole cavity 2207, providing clearance space for punching. The waste generated by punching can slide down the inclined surface of the top plate 2209 to the waste port 2213 on the side wall of the fixed template 22. Since the inclined angle of the top of the top plate 2209 is consistent with the inclined angle of the inner wall of the waste port 2213, the waste can slide smoothly out of the equipment, realizing the automatic collection and discharge of waste, and avoiding the accumulation of waste in the cavity 2203, which affects the subsequent forming and punching processing.

[0039] In an embodiment of the present invention, the inner sidewall of the fixed template 22 is provided with multiple slots 2214 and multiple control slots 2215, the slots 2214 and control slots 2215 are in a connected state, a blocking block 2216 is movably inserted into the slot 2214, the sidewall of the blocking block 2216 is connected to a limiting plate 2218 through a sliding post 2217, the limiting plate 2218 is movably arranged in the control slot 2215, and the sidewall of the limiting plate 2218 is connected to the inner wall of the control slot 2215 through a spring 2219; the end of the blocking block 2216 has a double-sloped pointed structure; the sidewall of the top plate 2209 is connected to a protruding plate 22091, the end of the protruding plate 22091 has a double-sloped pointed structure. The inclined surface at the end of the convex plate 22091 can form a squeezing and sliding state with the inclined surface at the end of the blocking block 2216; the top of the lifting plate 2208 is connected to multiple inserts 2220, and the side wall of the inserts 2220 is connected to a limit slider 2221; the bottom of the top plate 2209 is connected to multiple inserts 2222, and the side wall of the inserts 2222 is provided with a sliding groove 2223; the inserts 2220 are movably inserted into the inner cavity of the inserts 2222, and the limit slider 2221 is movably arranged in the sliding groove 2223; and the outer circumference of the inserts 2222 is fitted with a spring 2224, one end of the spring 2224 is connected to the top of the lifting plate 2208, and the other end is connected to the bottom of the top plate 2209.

[0040] The present invention also designs a protruding plate 22091 and a blocking block 2216. After the punching operation is completed and the waste generated by punching slides down the inclined surface of the top plate 2209 to the waste outlet 2213 on the side wall of the fixed template 22 for discharge, the top plate 2209 needs to rise and reset again to maintain the dome mold 2210 and the round cavity 2206 in an interlocking fit, and the square dome mold 2211 and the square cavity 2207 in an interlocking fit, so that the top of the cavity 2203 forms the outline structure of the beam body 1, providing a complete cavity structure for the next forming. When the top plate 2209 rises with the cylinder-driven lifting plate 2208, the double-sloped tips of the side wall protrusion 22091 will press and slide against the double-sloped tips of the blocking block 2216 in the slot 2214 on the side wall of the fixed template 22, pushing the blocking block 2216 back into the control groove 2215 and compressing the spring 2219. During this process, the lifting plate 2208 will continue to rise, while the top plate 2209 will remain in a suspended rising state for a short time due to the pressure between the protrusion 22091 and the blocking block 2216. The insert 2220 at the top of the top plate 2208 and the insert 2222 at the bottom of the top plate 2209 slide together via the limiting slider 2221 and the slide groove 2223. The spring 2224 is rapidly compressed. The moment the convex plate 22091 pushes open the blocking block 2216, the stagnant upward state of the top plate 2209 is lost. The compressed spring 2224 quickly releases its elastic force, pushing the top plate 2209 upward rapidly until the convex plate 22091 forms a pressing contact with the next blocking block 2216. During this process, the top plate 2208... The rapid rise and sudden stop of step 9 will generate a high-frequency impact vibration effect, which will shake off any residual or stuck punching waste material on the top of the top plate 2209, ensuring that the waste material slides smoothly to the waste discharge port. This solves the problem that punching waste material is easily stuck or stuck on the top of the top plate 2209 due to the structure of the dome mold 2210 and the square mold 2211 on the top of the top plate 2209, and cannot slide smoothly to the waste discharge port 2213, which in turn causes the dome mold 2210 and the square mold 2211 to be unable to reset and maintain the complete cavity structure.

[0041] Working principle: This embodiment provides a hydraulic forming equipment for the cab roof beam. In use, the beam blank is first placed in the pressure groove 2202 on the top of the fixed template 22. The lifting seat 31 of the moving mold assembly 3 is lowered by the cylinder, which drives the moving template 32 to move downward until the moving template 32 and the fixed template 22 are closed. At this time, the closing template 3201 and the closing groove 2201 form a closed and sealed state. The pressure plate 3202 and the pressure groove 2202 cooperate with each other to stably clamp and fix the beam blank, preparing for subsequent hydraulic forming. After the mold is closed, the liquid inlet valve 3207 is opened, and the high-pressure forming liquid of the external liquid filling system enters the liquid inlet chamber 3204 through the pipe 3206, and then enters the drainage channel 3305 through the notch 3310 on the slide cylinder 3309 of the drain rack 3304, and is finally delivered to the forming liquid chamber 3203. The high-pressure forming liquid pushes the beam blank to fit against the cavity 2203 of the fixed template 22. The air in the cavity 2203 is smoothly discharged through the exhaust hole 2212. Under the action of the high-pressure forming liquid, the beam blank fits against the inner wall of the cavity 2203. At the same time, the dome mold 2210 in the cavity 2203 is inserted into the round hole cavity 2206, and the square dome mold 2211 is inserted into the square hole cavity 2207, which together form the outline structure of the beam body 1 at the top of the cavity 2203, completing the hydraulic forming of the beam blank. After molding is completed, the liquid outlet valve 3209 is opened, and the telescopic cylinder 3307 of the flushing assembly 33 is activated simultaneously. The output end of the telescopic cylinder 3307 first drives the lifting platform 3301 to move downward at a low speed along the guide column 3308. The lifting platform 3301 pushes the liquid discharge rack 3304 to move downward synchronously through the spring 3312 on the connecting rod 3311. The molding liquid in the molding liquid chamber 3203 enters the drainage channel 3305 through the inclined channel 33051, and then passes through the notch 331. 0 enters the drainage chamber 3205 and is finally discharged to the external drainage system through the second pipe 3208; since the inlet of the inclined channel 33051 is located at the lowest point of the drainage rack 3304, and the square groove at the bottom of the drainage channel 3305 is inserted and matched with the protruding structure at the top of the crossbeam 1, the residual molding liquid in the lowest depression in the molding liquid chamber 3203 can be completely discharged. After the drainage rack 3304 continues to move down and fits against the top of the crossbeam 1, it forms a precise position for the crossbeam 1, completing the drainage and positioning operation; Then, the cylinder in the fixed mold assembly 2 is activated to control the lifting plate 2208 to drive the top plate 2209 to descend, so that the dome mold 2210 is disengaged from the round hole cavity 2206 and the square top mold 2211 is disengaged from the square hole cavity 2207, providing clearance space for punching; then, the output end of the telescopic cylinder 3307 drives the lifting platform 3301 to perform high-speed downward punching motion. The lifting platform 3301 overcomes the elastic force of the spring 3312, and drives the round hole punch 3302 to extend out from the drainage channel 3305 and the square hole punch 3303 to extend out from the square groove of the drain rack 3304. The round hole punch 3302 and the square hole punch 3303 simultaneously punch the top of the crossbeam 1, completing the processing of the round hole and the square hole. The waste generated by punching falls to the top of the top plate 2209, slides down the inclined surface of the top plate 2209, and is discharged outside the equipment through the waste port 2213 on the side wall of the fixed mold plate 22, realizing the automatic collection of waste. After punching is completed, the telescopic cylinder 3307 drives the lifting platform 3301 to move up and reset. The round hole punch 3302 and the square hole punch 3303 retract accordingly. At the same time, the cylinder drives the lifting plate 2208 to move the top plate 2209 up and reset. During the rise of the top plate 2209, the protruding plate 22091 on the side wall and the blocking block 2216 in the slot 2214 squeeze and slide against each other, pushing the blocking block 2216 to retract into the control slot 2215 and compress the second spring 2219. The lifting plate 2208 continues to rise, compressing the third spring 2224. When the protruding plate 22091 squeezes out the blocking block 2216, the third spring 2224 releases its elastic force to push the top plate 2209 up rapidly until the protruding plate 22091 contacts the next blocking block 2216. The rapid rise and fall of the top plate 2209 generates high-frequency impact vibration, which shakes off the residual waste material that is stuck or stuck on its top, ensuring that all waste material is discharged. After the top plate 2209 rises to the designated position, the dome mold 2210 is inserted into the round cavity 2206 again, and the square top mold 2211 is inserted into the square cavity 2207 again, and the cavity 2203 is restored to the complete outline structure of the crossbeam 1; finally, the moving template 32 of the moving mold assembly 3 is controlled to move upward to open the mold, and the processed crossbeam 1 is taken out from the cavity 2203 of the fixed template 22, completing a complete hydraulic forming and punching process of the cab top beam. The equipment can repeat the above steps for continuous production.

[0042] The embodiments disclosed in this invention are preferred embodiments, but are not limited thereto. Those skilled in the art can easily understand the spirit of this invention based on the above embodiments and make different extensions and variations, but as long as they do not depart from the spirit of this invention, they are all within the protection scope of this invention.

Claims

1. A cab roof cross member hydro-forming apparatus characterized by, It includes a fixed mold assembly (2), and a movable mold assembly (3) that can be raised and lowered is arranged above the fixed mold assembly (2); The fixed mold assembly (2) includes a base (21), a fixed template (22) is installed in the inner cavity of the base (21), and the top of the fixed template (22) is provided with a mold closing groove (2201), a pressure groove (2202) and a cavity (2203). The moving mold assembly (3) includes a lifting seat (31), a moving template (32) is installed at the bottom of the lifting seat (31), and a closing template (3201), a pressure plate (3202) and a forming liquid cavity (3203) are arranged at the bottom of the moving template (32). The moving template (32) has a flushing assembly (33) arranged in its inner cavity. The flushing assembly (33) includes a lifting platform (3301) arranged above the moving template (32) and a drain rack (3304) arranged in the forming liquid cavity (3203). The bottom of the lifting platform (3301) is connected to a plurality of round hole punches (3302) and a plurality of square hole punches (3303), and the round hole punches (3302) and the square hole punches (3303) are movably inserted into the drain rack (3304); The inner cavity of the drain rack (3304) is provided with a drainage channel (3305), and the entrance of the drainage channel (3305) is located at the bottom of the drain rack (3304). The drain rack (3304) can drain the molding liquid in the molding liquid cavity (3203) through the drainage channel (3305).

2. The hydraulic forming equipment for the cab roof crossbeam according to claim 1, characterized in that, The cavity (2203) includes a plurality of punches one (2204) and a plurality of punches two (2205). The punches one (2204) have a circular cavity (2206) from top to bottom, and the punches two (2205) have a square cavity (2207) from top to bottom. The inner cavity of the fixed template (22) is also provided with a cylinder-driven lifting plate (2208), the top of the lifting plate (2208) is connected to a top plate (2209), and the top of the top plate (2209) is connected to multiple dome molds (2210) and multiple square dome molds (2211). When the lifting plate (2208) rises, the dome mold (2210) can be inserted into the round cavity (2206), and the square top mold (2211) can be inserted into the square cavity (2207) to form the outline structure of the crossbeam (1) on the top of the cavity (2203); when the lifting plate (2208) falls, the dome mold (2210) disengages from the round cavity (2206), and the square top mold (2211) disengages from the square cavity (2207) to provide clearance space for the round hole punch (3302) and the square hole punch (3303) to punch holes on the top of the crossbeam (1).

3. The hydraulic forming equipment for the cab roof crossbeam according to claim 2, characterized in that, The flushing assembly (33) also includes a frame (3306) installed on the top of the moving template (32), a telescopic cylinder (3307) is installed on the top of the frame (3306), and the frame (3306) and the moving template (32) are connected by a plurality of guide columns (3308); the lifting platform (3301) is slidably arranged on the guide columns (3308), and the output end of the telescopic cylinder (3307) is connected to the top of the lifting platform (3301).

4. The hydraulic forming equipment for the cab roof crossbeam according to claim 3, characterized in that, The inner cavity of the moving template (32) is also provided with an inlet cavity (3204) and a drain cavity (3205) that are connected to the forming liquid cavity (3203); The inlet of the liquid inlet chamber (3204) is connected to the liquid inlet valve body (3207) through a pipe (3206), and the inlet of the liquid inlet valve body (3207) is connected to an external liquid filling system; The outlet of the drain chamber (3205) is connected to the outlet valve body (3209) through the second pipe (3208), and the outlet of the outlet valve body (3209) is connected to the external drain system.

5. The hydraulic forming equipment for the cab roof crossbeam according to claim 4, characterized in that, The top of the drain rack (3304) is integrally formed with multiple slide cylinders (3309), the inner cavity of the slide cylinder (3309) forms the drainage channel (3305), and the top of the slide cylinder (3309) is provided with a notch (3310). One of the slide cylinders (3309) is slidably disposed in the liquid inlet chamber (3204), and the drainage channel (3305) is connected to the liquid inlet chamber (3204) through the notch (3310); Another slide cylinder (3309) is slidably disposed in the drainage chamber (3205), and the drainage channel (3305) is connected to the drainage chamber (3205) through the notch (3310).

6. The hydraulic forming equipment for the cab roof crossbeam according to claim 5, characterized in that, The round hole punch (3302) is a cylindrical rod structure. The round hole punch (3302) slides through the inner cavity of the moving template (32) and extends into the drainage channel (3305) of the slide cylinder (3309). The round hole punch (3302) is in clearance fit with the inner wall of the drainage channel (3305). The top of the forming liquid cavity (3203) is also provided with a sealing groove (3210), a spring groove (3211) and a movable groove (3212), and the sealing groove (3210) is connected to the movable groove (3212) through the spring groove (3211); The protruding structure on the top of the drain rack (3304) can form a sealed insertion state with the sealing groove (3210); The bottom of the drain rack (3304) is also provided with a square groove, and the square hole punch (3303) is movably arranged in the square groove. When the square hole punch (3303) moves upward, it can drive the drain rack (3304) to rise through the square groove, and the top of the square hole punch (3303) forms a sealed fit with the inner wall of the square groove. The top of the square hole punch (3303) is connected to the bottom of the lifting platform (3301) via a connecting rod (3311). The connecting rod (3311) moves through the square groove of the drain rack (3304). A spring (3312) is arranged on the outer circumference of the connecting rod (3311). One end of the spring (3312) is connected to the bottom of the lifting platform (3301), and the other end is connected to the top of the drain rack (3304). The spring (3312) is also spaced within the spring groove (3211).

7. The hydraulic forming equipment for a cab roof crossbeam according to claim 6, characterized in that, The bottom of the drainage channel (3305) is a square groove structure, which is used to form a plug-in fit with the protruding structure on the top of the crossbeam (1). The bottom of the drainage channel (3305) is also connected to an inclined channel (33051). The entrance of the inclined channel (33051) is the lowest point of the drain rack (3304).

8. The hydraulic forming equipment for the cab roof crossbeam according to claim 2, characterized in that, The cavity (2203) has multiple vent holes (2212) from top to bottom. The vent holes (2212) are used to expel air during the process of the high-pressure forming fluid pushing the crossbeam blank to fit against the inner wall of the cavity (2203).

9. The hydraulic forming equipment for the cab roof crossbeam according to claim 2, characterized in that, The side wall of the template (22) is provided with a waste outlet (2213). The inner wall of the waste outlet (2213) is an inclined surface structure. The top of the top plate (2209) is an inclined surface structure. The inclination angle of the top of the top plate (2209) is consistent with the inclination angle of the inner wall of the waste outlet (2213).

10. The hydraulic forming equipment for the cab roof crossbeam according to claim 9, characterized in that, The inner sidewall of the fixed template (22) is provided with multiple slots (2214) and multiple control slots (2215). The slots (2214) and control slots (2215) are in a connected state. A blocking block (2216) is movably inserted in the slot (2214). The sidewall of the blocking block (2216) is connected to a limiting plate (2218) through a sliding column (2217). The limiting plate (2218) is movably arranged in the control slot (2215). The sidewall of the limiting plate (2218) is connected to the inner wall of the control slot (2215) through a spring (2219). The end of the blocking block (2216) has a double-sloped pointed structure; The top plate (2209) has a convex plate (22091) connected to its side wall. The end of the convex plate (22091) is a double-sloped pointed structure. The sloping surface of the end of the convex plate (22091) can form a squeezing and sliding state with the sloping surface of the end of the blocking block (2216). The top of the lifting plate (2208) is connected to a plurality of insert posts (2220), and the side wall of the insert posts (2220) is connected to a limit slider (2221). The bottom of the top plate (2209) is connected to a plurality of inserts (2222), and the side wall of the inserts (2222) is provided with a sliding groove (2223); The insert (2220) is movably inserted into the inner cavity of the insert (2222), and the limiting slider (2221) is movably arranged in the groove (2223); Furthermore, a spring three (2224) is sleeved on the outer circumference of the insert (2222), one end of the spring three (2224) is connected to the top of the lifting plate (2208), and the other end is connected to the bottom of the top plate (2209).

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